Wed Nov 20 12:59:37 2024, Tyler, Update, Electronics, RIN Update
|
I went ahead and compared the noise spectrum of the ADC to those of the photodetectors with the FROSTI on and off. As discussed last meeting, it looks like
the measurements with the Red Pitaya (RP) are limited by the ADC noise floor. Another avenue to explore in this measurement could be switching to the
cymac ADCs. |
Wed Nov 20 12:31:24 2024, Luis, Update, VAC, Leak test RGA Scan after vacuum repairs
|
[Luke, Luis]
After the gasket replacement performed on Monday (11/18/24) we let the vacuum pump down to UHV pressure for a couple days. Today (11/20/24) we
measured the pressure to be 5.30*e^-9 with a temperature of 22C, and we performed a leak test and RGA Scan. |
Tue Nov 19 17:10:34 2024, Luke , Update, VAC, Leak check
|
Chamber temperature: 23C
Chamber Initial Pressure: ~1.8e-8 main, ~3.5e-8 rga
Did another leak test after monday's work to check how the seal was holding up initial leak was 5.5e-9. I then tried to tighten the bolts a bit |
Thu Nov 14 11:58:05 2024, Shane, Update, CDS, Turbo pump connection troubleshooting
|
Attempted connection to the TV551 turbo pump through Varian/Agilent's software on spica. Successful connection established, and we are able to read out
al the readings associated with the pump (status, temperature, etc) through the software, which is actually pretty extensive and well organized. Was able
to stop and restart the pump with no issues. Serial communications seem to be working fine, and the current serial settings (baud rate 9600, serial type |
Thu Nov 14 10:46:20 2024, Luke , Summary, Cleanroom, Cleanroom cleaning
|
[Luke, Luis, Michael]
cleaning cleanroom and particle count |
Wed Nov 13 14:06:00 2024, Luke , Update, General,
|
slides |
Wed Nov 13 14:03:32 2024, Tyler, Update, Electronics, RIN Update
|
[Tyler]
We've added two low-pass filters in hopes of reducing any potential aliasing that may be introducing additional noise into the power spectra
for the RIN measurements. It still looks like the noise levels are too high. Attached below are some recent measurements taken with the FROSTI powered
on and off.
|
Wed Nov 6 13:48:55 2024, Liu, Update, Interferometer Simulations, QN modeling update
|
Slides |
Tue Nov 5 11:08:40 2024, Luis Martin, Update, VAC, ISO Test
|
[Luis, Luke, Ma Michael]
The isolation test was conducted on the vacuum system. Every pump was turned off under vacuum, and pressure measurements were taken
every minute for 15 minutes. The results are displayed in the sheet linked at the end of this report. The pressure of the main volume dropped very slowly.
|
Tue Nov 5 09:56:04 2024, Luis Martin, Update, Clean & Bake, MR Bake
|
[Luke, Luis]
On Friday, 11/1/24, the MR was unpackaged and cleaned under the flow bench. We noticed an ink stain on one of the corners of the
material. After wiping it down with IPA and Vector Alpha wipes, the stain was removed. However, the material showed some wear.
|
Tue Oct 29 16:37:35 2024, Tyler, Update, Electronics, Red Pitaya OS Update
|
The Red Pitaya ecosystem has been upgraded to OS 2.00-35, with a key feature being greater freedom in adjusting the sampling frequency for signal
analysis. Before, decimation factors could only be applied if they were a power of 2 (i.e 2,4,8,16,...) up to 65536. Now, the factors can be any power
of two up to 16, and any whole number greater than 16 up to 65536. Further information can be found here. |
Fri Oct 25 10:56:30 2024, Shane, Update, CDS, Timing Chassis fixed and reinstalled
|
[Ma, Shane]
We replaced the 1A breaker in the timing chassis today with a 4A one, and tested that all is working
well. The chassis successfully outputted the correct signal (image attached). The real time models have also been restarted and the CyMAC diagnostics screen
is showing all green flags. Timing chassis has been closed up and reinstalled in the server rack. |
Wed Oct 23 12:33:54 2024, Luke , Update, , Zernike calculation update
|
PowerPoint slides new
PowerPoint slides older |
Wed Oct 23 12:08:36 2024, Luis Martin, Update, VAC, RGA Scan
|
[Luke, Luis, Mary, Ma]
On 10/22/24 Luke, Ma, Mary and myself ran a RGA scan, the results are displayed below. The overall pressure of the vacuum was 2.0e-8 and the temperature
readings were 26C for the RGA and 25C for the main volume. |
Wed Oct 23 11:48:06 2024, Luis Martin, Update, VAC, Leak Test Results
|
[Luke, Luis, Mary, Ma]
On 10/22/24 Luke, Ma, Mary and myself ran a leak test, the results are displayed below. The overall pressure of the vacuum was 2.0e-8 and the
temperature readings were 26C for the RGA and 25C for the main volume. |
Thu Oct 17 13:24:23 2024, Shane, Update, CDS, Timing Chassis issue identified
|
[Ma, Luis, Shane]
Working theory for the timing chassis issues had been that the 1A breaker was tripping and
causing the failure of the Valon 5015 and 3010 to output the timing signal correctly. We just tried bypassing the breaker, running 6 V on the benchtop
power supply (set the current limit to 1.5A), with the 5010 generating the sine wave to pass to the 3010. All worked correctly, and there were no issues. |
Wed Oct 16 14:13:31 2024, Liu, Update, , FROSTI with non uniform absorption scattering sources
|
Slides |
Wed Oct 16 13:58:59 2024, Luis Martin, Update, VAC, RGA Scan
|
The following figure displays data acquired on 10/09, and it shows that we are no longer below the cleanliness standard. Also, the system's pressure
went up to 1.9x10-8 Torr (approximately 7x10-9 Torr previously). This might be due to a leak somewhere in the system. More tests
will be performed later. |
Tue Oct 15 15:27:38 2024, Xuesi Ma, Update, ELOG, Timing Chassis Update 12x
|
I conducted separate tests on the '5015' and '3010a'. When powered individually, the '5015' outputs a signal at 33.55 MHz with an amplitude of 608
mV. It draws 1 A of current from the power source. The input signal for the '3010a' is 33.54 MHz with an amplitude of 670 mV (peak-to-peak) and a 15 mV
DC offset. The output signal from channel 1 is a 65.5 kHz square wave with an amplitude of 3.28 V. The '3010a' draws 0.1 A of current.
|
Wed Oct 9 13:52:31 2024, Tyler, Update, TCS, RIN Update 10/09/2024
|
I tried adjusting the gain settings on the photodetectors to check if this would help improve the RIN spectra measurements. Overall, it doesn't look
like it does, and if anything, looks worse. I assume this is so because as the gain is lowered, the amount of detectable signal from the FROSTI becomes
smaller and smaller. |
Thu Oct 3 19:35:04 2024, Shane, Update, Cleanroom, Cleanroom cleaning and particle count
|
[Luke, Michael, Cynthia, Mary]
cleaning cleanroom and particle count
12:25 pm: started particle count
zone 3: 0.3 u: 46140.5 u: 8721.0 u:83
zone
4: 0.3 u: 24110.5 u: 4151.0 u: 83
12:48 pm: began surface check and wipedown, including |
Wed Oct 2 14:49:59 2024, Liu, Update, , FROSTI ETM actuation
|
Proposed FROSTI ETM actuation on the HOM7 resonance.
Animation |
Wed Oct 2 13:38:00 2024, Cynthia, Update, Interferometer Simulations, cavity scan with averaged O4 ETM coating as plume
|
|
Wed Oct 2 12:20:43 2024, Tyler, Update, TCS, Updated FROSTI Analysis 10/02/2024
|
Attached below are updates on current FROSTI prototype analysis. |
Wed Oct 2 12:05:42 2024, Luke , Update, , Ringheater modeling Update
|
Power point slides |
Wed Oct 2 10:31:46 2024, Xuesi Ma, Configuration, , Group Meeting Slides 10/2/2024
|
Group Meeting slides for Non-deterministic Heater Response.
|
Tue Oct 1 19:41:23 2024, Shane, Update, CDS, CyMAC Timing Chassis Issue
|
[Shane, Luis]
Summary of the issue we've been having with the timing chassis: when we connect only the Valon 5015 to power, the timing signal comes
out of it sinusoidal as expected and the status lights are steady and all looks good. As soon as we connect the 3010 to power, the signal (both coming
out of the 5015 and coming out of the 3010) go flat and the status lights of the 5015 start to flicker.
We think what may be going on is that the 5015 |
Wed Sep 25 09:06:09 2024, Luis Martin, Update, VAC, RGA Scans
|
RGA
Scan Comparison
The following images compare the RGA scans from 9/23/24, after the first bake with the new vacuum system,
with those from 3/14/24, after bake 12 with the old system. |
Mon Sep 23 15:11:21 2024, Tyler, Update, Scripts/Programs, Effective Emissivity Analysis and RIN Update
|
A quick update on the effective emissivity analysis for the CIT FROSTI testing:
I was able to (roughly) match the OPD data to a referenced COMSOL model, with an applied power of 12.6 W (as seen below). However, when changing
the emissivity of the ETM in COMSOL, the dT profiles do not seem to change much. I am not sure as to why this is the case at the moment, and will continue |
Mon Sep 23 15:00:41 2024, Cynthia , Update, Interferometer Simulations, corrections on assumption for O5 coating
|
The document recording ETM07 and ETM08 coating (T2300093) was discussed:
the current plume files are not necessarily correct in a way that LIGO lab
have tried to add it on uncoated ETM such as ETM07 and it does not match what the coated ETM07 would look like.
the plume should be added on top of
the uncoated ETM instead of assuming an ideal ETM. According to Garilynn, the imperfection on uncoated ETM matters.
So far the possible ETM data used |
Mon Sep 23 08:29:49 2024, Luke, Update, Interferometer Simulations, Ringheater update
|
Ringheater Update
If the link does not work here is the file. |
Mon Sep 16 15:18:59 2024, Cynthia , Update, Interferometer Simulations, a breakdown of FROSTI and thermal effects and the resulting cavity scan
|
|
Mon Sep 16 14:59:51 2024, Tyler, Update, TCS, FLIR RIN Update 09/16
|
Below is the dark noise spectrum of the Red Pitaya, which was measured over the course of a weekend. Additionally, I have successfully measured a signal
from the photodetectors with the FROSTI as the IR source, so it seems there shouldn't be any worry of these particular detectors not being feasible for
the RIN measurement. |
Mon Sep 16 13:51:23 2024, Luis Martin, Update, VAC, RGA Scans
|
[Luis, Luke}
Three RGA scans were taken. The improvement in the amount of HC in the vacuum is visible across the different measurements.
Images are attached. |
Mon Sep 16 07:28:16 2024, Luke, Update, Interferometer Simulations, Ring heater update
|
|
Mon Sep 9 21:02:37 2024, Luke, Update, VAC, Steadystate temperature of flanges
|
I measured the temperature of the flanges and reconnected the RGA turning on its filament. I then turned off the PID controllers.
Here is a table that has the temperature of the different parts of the vacuum chamber.
Electronics
Temperature (C)
Pressure gauge (Main volume)
81
Main |
Mon Sep 9 14:27:36 2024, Pooyan, Infrastructure, Computers, Chimay backup attempt
|
One ongoing work is to make all lab machines automatically backed-up on Scribe on a daily basis. The updates should be boatable and stored for some time
(potentially a few weeks) on Scribe. Making whole disk images has already been tried for some of the machines with no problems. (e.g., Cymac and WorkStations)
The same thing can not be done with Chimay though, as it currently has one huge RAID-controlled volume that stores all the information (OS, home |
Mon Sep 9 12:36:45 2024, Michael, Update, Interferometer Simulations, Update on Analysis of Mode Mismatch Minimization in A#
|
I have taken a closer look at the solution curve in the mirror parameter space which I have searched, focusing on the "resilience" of specific points, with
the plan to analyze how certain conditions of the interferometer change as we move along this solution curve. |
Fri Sep 6 14:34:52 2024, Luke , Update, VAC, Heating tape work
|
On the 5th I had tried to start baking the vacuum chamber however certain parts of the chamber were getting too hot and causing the controllers to shut
off. So I turned them off so that the next day I could rearrange the temperature probes. I then on the 6th set them up so that instead of overshooting
the temperature they would be a little low in places. |
Tue Sep 3 18:24:17 2024, Tyler, Update, CDS, Cymac Timing Chassis Issue
|
[Tyler, Jon]
The timing chassis used for the cymac has been shut off due to an unknown issue causing its supplied current to fluctuate. All real-time
models will be suspended until a solution is found.
|
Tue Sep 3 15:52:56 2024, Luke, Update, VAC, Heater tape initilization
|
[Luke, Tyler, Jon]
On the 3rd we set up the pid controllers for the heater tapes and after putting on the insulation we started heating them up. We first brought
it to ~50C and let it stabilize, there was about a 6-7 degree difference between the RGA and the barrel temperature, with the barrel being higher. We then |
Sun Sep 1 16:17:40 2024, Luke, Update, VAC, Vacuum chamber leak checking and re-applying heating tape
|
[Luke, Luis, Cinthia, Michal, Tyler]
On the 26th Cinthia, Michal, and I took off the insolation on the vacuum chamber and re-routed it to include the new RGA volume.
The next day Luis and I finished up the last of the flanges to be attached. We attached the Pirani gauge with a conical reducing nipple to the |
Thu Aug 29 16:39:34 2024, Luke, Update, VAC, Photos of heater tape 6x
|
|
Tue Aug 27 18:37:40 2024, Luke, Update, Interferometer Simulations, Ringheater model update
|
Updated the model to produce a more circular deformation in the HR surface. The first three attachments are from irradiance patterns gotten from ray tracing.
The last is from a pre-defined irradiance pattern. |
Tue Aug 27 15:01:26 2024, Luke, Update, VAC, RGA line leak testing
|
[Luke, Tyler]
On the 27th Tyler and I ran the RGA leak test again with the electron multiplier on. These were the leaks we measured. The chamber's overall pressure
was at ~6e-8 torr. |
Mon Aug 26 14:42:04 2024, Cynthia , Update, Interferometer Simulations, current status on cavity scan with effects of FROSTI
|
I used the code and arm cavity model used for previous O5 study on mirrors and HOM (the pdf of the study and the result can be found at https://dcc.ligo.org/LIGO-G2100878),
but it seems like the result I obtained is different from the study result. Since my cavity scans codes have a large portion of it relying on this code,
I will have to go over the study result and the code to make sure there is no issue with that code itself first. There are also some other updates or issued |
Fri Aug 23 16:08:32 2024, Luke, Update, VAC, RGA line leak testing
|
[Luke, Luis, Jon, Tyler]
On the 22nd Dr. Richardson showed Luis, Tyler and I how to preform a leak test with the RGA. We did the initiall test and found a few leaks two
were particuarly bad highlighted in orenge below. To try and remidy this we planned on replacing the copper gaskests on the leaking flanges. We then began |
Mon Aug 19 07:11:55 2024, Cynthia, Update, Interferometer Simulations, cavity scans with FROSTI effects
|
|
Fri Aug 16 12:51:46 2024, Luis Martin, Update, VAC, Update on vacuum chamber status
|
[Luis, Luke, Tyler]
Vacuum chamber parts were finally received and assembled. After whipping down the parts, the blank was removed from the reducing cross. Then,
the zero-length reducer was attached. Lastly, we installed the T that had the argon leak and RGA. The final pump down showed signs of an improved seal |
Mon Aug 12 17:09:04 2024, Cynthia , Update, Interferometer Simulations, O4 vs O5 cavity scans with ITM plume guess or ETM
|
So far the proposed solution for what to use for O5 ITM mirror for SIS simulations is either the plume guess file or using the O5 ETM mirror for ITM. I
had ran a cavity scan for both of these possibilities and it seems like the results produced are fairly different. The next step is most likely moving
on to adding the Frosti effects including both of the proposed possibilities, and before this, a few confirmations and verifications are needed using similar |
Mon Aug 12 16:35:30 2024, Luke , Update, , Ringheater modeling Update
|
|
Mon Jul 29 14:30:16 2024, Tyler, Update, Cleanroom, RIN Measurement Set-up
|
[Tyler]
I have begun moving parts into the cleanroom for the upcoming FROSTI RIN tests that will be conducted within the next few weeks. While waiting
for the rest of the equipment to arrive to perform the full-scale tests, I have additionally moved the FROSTI under the shelf above the optical table,
where it will stay for the meantime. As always, please use caution when in the cleanroom. Aside from the FROSTI, the IR photodetectors that will be used |
Mon Aug 12 16:24:34 2024, Tyler, Update, Cleanroom, RIN Measurement Update 1
|
[Tyler]
For some preliminary tests, I moved the IR photodetectors outside of the cleanroom and onto the other optical table. The basic goal was
to obtain a signal from both photodetectors. To achieve this, one of the heater cartridges used for early FLIR measurements months ago was hooked up to
a power supply (PS). The PS was set to supply 0.20 A with a voltage of 2.8 V; the corresponding power is thus 0.56 W. With this, I was able to measure |
Tue Aug 6 13:07:07 2024, Xuejun, Update, Interferometer Simulations,
|
[Xuejun]
The width and location of the measured in-air change in temperature profile has been determined to be 0.045m and 0.137m respectively. Subsequently,
a fake irradiance profile was able to be generated that best resembled what the actual irradiance profile could be using this information for testing in
COMSOL. The generated irradiance profile that output the most similar change in temperature profile as the measured in-air profile has been included as |
Sun Aug 4 09:01:01 2024, Michael, Update, Interferometer Simulations, Update on SRC Mode Mismatch Analysis
|
An update on my analysis to minimize mode mismatch/scattering by introducing toroidal mirrors to the SRC. |
Fri Aug 2 13:50:22 2024, Shane, Update, CDS, Serial Comm. Test (Agilent Turbo Pump)
|
Did a brief communication test with the agilent turbo pump today, to see if we could get serial communications up and running for it. Used a simplified
python script with sockets package to establish a connection and send a simple command to query the pump's operational status. The connection was successful,
and had no issues establishing. The command also sent successfully, and received a response. The response didn't make sense, though, as all the possible |
Thu Jul 11 21:01:37 2024, Jon, Infrastructure, General, Cable tray installed in 1129
|
Today I installed a 10' cable tray in 1129, for permanently routing Ethernet lines to the workstations. It is securely bolted to C-channels in the side
wall and in the center cable tray. |
Tue Jul 30 07:42:47 2024, Jon, Infrastructure, General, Cable tray installed in 1119
|
Yesterday I installed another 5' cable tray in 1119, for permanently routing Ethernet lines to the L-bench. It is securely bolted to the top of the electronics
rack, on one end, and to the top of the glass-door storage cabinet, on the other. This eliminates the need for the cable ramp which previously sat behind
the rack. |
Thu Mar 21 16:56:42 2024, Tyler, Update, DAQ, RTD Parameter Calibration
|
[Jon,Tyler]
We noticed that the RTD temperature readings given on the Cymac were off, and traced the issue to miscalibration in the relationship
between the resistance and temperature of each RTD (Callendar-Van Dusen eqn). Below is the table of values inferred from independent measurements of temperature
and resistance to rectify this problem. This data was then fitted to better determine the coefficients present in the temperature-resistance relation: |
Mon Mar 25 10:55:33 2024, Tyler, Update, DAQ, RTD Parameter Calibration
|
Refitted RTD calibration, neglecting quadratic term:
R_0 (ohm) Alpha (1/C)
RTD 0 79.3962 0.002031
RTD 1 78.2874 0.002530 |
Tue Mar 26 13:51:56 2024, Tyler, Update, DAQ, RTD Parameter Calibration
|
Another re-fit, but this time the quadratic coefficient (beta) is set to 1.003e-6:
R_0 (ohm) Alpha
(1/C)
RTD 0 79.7386 0.001863 |
Mon Jul 29 13:39:16 2024, Tyler, Update, DAQ, RTD Parameter Calibration
|
[Tyler]
Using the data taken during the FROSTI testing at Caltech, I attempted to find a better calibration of the RTD sensors, given our past issues
with inaccurate readings. The fit parameters, alpha and beta, are still all different from the initial values given to us by Fralock (alpha = .003, beta
= 1.003e-6, R_0 was not given), but the true values will differ based on factors such as part geometry.
|
Mon Jul 29 12:23:10 2024, Liu, Update, Interferometer Simulations, Update on mechanical resonances of CE BS with stiffener ring
|
Update on mechanical resonances of CE BS with stiffener ring is attached. |
Mon Jul 29 12:20:56 2024, Liu, Update, Interferometer Simulations, Update on wavefront actuation with astigmatically driven RH for CE
|
Update on wavefront actuation with astigmatically driven RH for CE is attached. |
Mon Jul 29 12:18:52 2024, Liu, Update, Interferometer Simulations, Update on FROSTI O5 ETM profile optimization
|
Update on FROSTI O5 ETM profile optimization is attached. |
Fri Jul 26 17:25:42 2024, Jon, Infrastructure, Computers, New workstation ws4 installed in 1129
|
Today I installed the second desktop workstation in 1129. The new machine is an Intel NUC13ANHi5, with a 12-Core Intel i5-1340P CPU, 32GB DDR4 RAM, and
a 1TB SSD.
I loaded it with a fresh installation of Debian 12 and installed the LIGO CDS workstation (control room) tools. It is assigned the hostname ws4 |
Mon Jul 22 18:19:34 2024, Luke, Update, VAC, Zero length reducer stuck bolts
|
Today, I borrowed a bolt extractor drill bit from the machine shop to remove some stuck bolts from the zlr. Before starting, I laid down a sheet of aluminum
foil on the work table and wiped down all the tools I was going to use. I began by drilling a small pilot hole and then enlarged it with a 5/32 drill bit.
However, when I attempted to use the bolt extractor, it didn't grip the bolt effectively. Our bolts were too seized, causing the extractor bit to repeatedly |
Tue Jul 9 18:19:50 2024, Shane, Update, CDS, ADC-DAC loopback testing and IOLAN installation
|
[Shane, Jon]
Finished ADC-DAC loopback testing today (see attached xlsx file or access directly here).
All looks well with the first 8 channels, with the gain hovering just under 2. Also edited c1msc model in simulink to add channels 7-15 (the last 8 channels),
and changed the rate back to 64K. See image 1 for the updated c1msc model. The last 8 channels are also looking good and show no problems, with slightly |
Tue Jul 16 18:43:07 2024, Shane, Update, CDS, ADC-DAC loopback testing and IOLAN installation
|
UPDATE:
Follow up ADC-DAC loopback testing now complete, matching all the ADC channels to a single DAC channel, and then matching all the DAC channels
to a single ADC channel (see attached xlsx file or access directly here).
Also note c1msc model file has been updated to include the second set of 16 ADC channels. The newly added channels also have their own filter modules, |
Mon Jul 15 15:52:40 2024, Michael, Update, Interferometer Simulations, aLIGO locking with varying SRC mirrors and measuring mode mismatch
|
|
Mon Jul 15 15:44:52 2024, Cynthia , Update, Interferometer Simulations, performed cavity scans with thermal effects and ring heater
|
|
Mon Jul 15 14:49:06 2024, Pooyan, Update, Computers, Synology NAS server setup
|
Installed a Synology NAS server (Synology RackStation RS1221) in lab room 1129, with host name “scribe” and ip “192.168.1.17”. It is mounted on the rack
and each of its 8 storage bays has a 2TB SSD disk. It will be used to set up automated backups of all the lab machines (e.g., chimay, logrus, megatron).
One shared storage is set on it with SHR-2 as its RAID type. It can tolerate the failure of two disks and has 10.4TB of total capacity. |
Mon Jul 15 14:28:32 2024, Pooyan, Update, Interferometer Simulations, aLIGO test mass surface profiles
|
Created a Google Slides presentation to summarize all the mirror surface map information that we use for simulating interferometers.
A+ expected maps are based on correspondence with G. Billingsley. The estimate for the A+ ITMs will be to take the “as polished” data and add coating
non-uniformity to it. (T2000398) Neither of these are scaled for the precise thickness of the Ti:Ge coatings. |
Mon Jul 15 13:30:49 2024, Luke , Update, VAC, Problem with 2.75" to 1.33" zero length reducer
|
Last Friday while checking the depth of the ZLR I got one of the screws stuck. Today I tried a couple things to get it out. First I tried a few different
pliers to be able to grip lower on the screw this didn't work. So I switched to the other method of drilling a small hole to see if maybe the threads would
pull away from the walls of the hole a bit. This kind of worked as seen in the picture below I was able to remove most of the screw but there is a bit |
Mon Jul 15 09:36:44 2024, Liu, Update, Interferometer Simulations, ETM Profile Optimization for FROSTI
|
This is to optimize the FROSTI heating profile for ETM, by minimizing the residual RMSE of the HR surface deformation after the beam size weighted curvature
is removed by the current RH. The parameters of the profile being explored are the location, width, and total power for the Gaussian Annulus. As shown
in the attached series of plots, the optimal location is 9.9 cm, with a width of 7.7 cm, and a total FROSTI power of 12.7 W (for 1 W of Gaussian beam absorption). |
Sat Jul 13 15:09:04 2024, Luke, Update, General, Ring heater COMSL model update
|
After the feedback from last meeting and Liu's help narrowing down what I should do to improve the model. I made some changes: First with Liu's help
I made the proportions of the test mass and ring heater much more reasonable and parametrized by constants. Second from Cao's paper "FROSTI Nonimaging
Reflector Design" Liu showed me what I should do to define the elliptical mirrors. Third during Friday's modeling/programming meeting walked me through |
Thu Jul 11 15:53:39 2024, Luke, Update, VAC, RGA line upgrade
|
[ Luke, Jon ]
Started work at 11:00
As mentioned in my previous post the RGA was not clearing the table because of a tilt in the cross. So I removed the 90 deg elbow, loosened the |
Wed Jul 10 17:31:07 2024, Luke, Update, VAC, RGA line disassembly and upgrade
|
[ Luke, Cynthia, Michael, Xuesi, Anthony ]
Started work around 12:45
We vented the chamber first and once it reached atmospheric pressure we started taking apart the RGA line. |
Mon Jul 8 17:01:45 2024, Shane, Update, CDS, New CyMAC internal layout
|
[Jon, Shane]
Internal layout of CyMAC has been updated (labeled image attached) to accommodate the replacement of the two ribbon cables. Looking down
on the chassis from the front, and going from left to right, the new placement is as follows: BIO card, DAC adapter board, ADC adapter board, DAC card,
ADC card. NOTE: As part of ADC-DAC loopback testing, we're disconnecting from the FROSTI readout chassis and using the cables to connect directly from |
Mon Jul 8 12:26:10 2024, Michael, Update, Interferometer Simulations, Minimizing Astigmatic Effects in the SRC of LIGO
|
This is the first look and analysis of the effects of astigmatism in the aLIGO optical layout which can lead to mode mismatch and therefore increased losses
into higher order modes. Specifically I am currently looking at measuring the effect of changing the radii of curvature of the SRC mirrors https://docs.google.com/presentation/d/1qhIehqyNukg4g8S2fqfQZz83yr9aB76tEa6fn2J-TrM/edit?usp=sharing |
Mon Jul 8 10:39:14 2024, Xuejun, Update, FLIR, Average Temperature Profile
|
After taking data for each of the individual heater elements, I imported them into python and overlayed them to produce an average temperature profile.
I rotated the 7 of the elements to align with element 1's profile and averaged them out. By setting the range to 28C - 33C (this gave the best visibility
of the heating pattern) it gave the profile attached. |
Fri Jul 5 14:23:13 2024, Liu, Update, Interferometer Simulations, Engineering drawings for straight edge heater element designs for FROSTI
|
Step files and engineering drawings for the straight edge heater element designs have been created in COMSOL and SolidWorks. They are available in the group
Git
Repo. With those, we will initiate a discussion with the ceramics supplier for an estimate of the feasibility and benefits of the straight edge element |
Fri Jul 5 14:12:32 2024, Liu, Update, Interferometer Simulations, CE BS Mechanical Resonances
|
The butterfly and drumhead mechanical modes for the aLIGO BS were calculated in COMSOL. The resonant frequencies for the two acoustic modes are 2.45
kHz and 3.61 kHz, matching the results in reference
for instance.
For a quick projection for the resonant frequencies going from aLIGO to CE, the height and width of the BS are increased assuming |
Fri Jul 5 13:17:44 2024, Liu, Update, Interferometer Simulations, Four-quadrant FROSTI-like RH for astigmatic thermal actuation for CE optics 7x
|
In the CE corner layout design and down selection study, interferometer layouts with large incidence angles on some of the curved optics are being considered,
such as the folding mirrors in the "long crab". This however generates astigmatic beams upon reflection and results in mode mismatches in coupled cavities
that need to be mitigated. Astigmatic thermal actuation for the optics involved is thus essential. One way we are considering is to implement a FROSTI-like |
Mon Jul 1 15:19:42 2024, Cynthia , Update, Interferometer Simulations, O4 and O5 mirror cavity scans with thermal effect
|
|
Mon Jul 1 11:45:45 2024, Sid, Update, Interferometer Simulations,
|
Progress update: Most of last week was spent getting set up with SIS, and learning how to do basic simulations. The goal for this week is to begin reproducing
the methodology from T2000338. I have begun with studying perturbations to mirror curvature and position in a simple FP cavity, but thus far have been
unable to get the same results. |
Fri Jun 28 18:15:16 2024, Luke, Update, VAC, Vacuum chamber
|
We will be configuring the RGA line to remove the spherical cube from the system. Currently our plan for the new design is to connect a 4.5" to 2.75"
Reducing Cross to the gate valve on the vacuum system. It will be orientated vertically with the turbo pump on top coming off the end will be a 90 deg
elbow. On the bottom there will be a 4.5" to 2.75" Zero length reducer attached to that will be a Tee on one side the pressure sensor and the other the |
Fri Jun 28 10:43:13 2024, Xuejun, Update, Cleanroom, Frosti
|
[Xuejun, Tyler]
We moved Frosti into the cleanroom and debugged it to make sure everything was working. One of the DB25 pins broke off at the connector
for element 1 so it needed to be recrimped. Element 6 short circuited but fixed with adjustment to the heater power pin position. We connected the power
and sensor connectors to the power box and recalibrated the RTD sensors.
|
Thu Jun 27 13:42:02 2024, Shane, Update, Cleanroom, cleanroom 5 zone particle count measurement
|
Here's today's 5 zone measurement of the cleanroom. We're above the limit by a bit in zone three (all three size ranges), likely as a result of the recent
work installing FROSTI, so it could probably use another focused cleaning. Everything else is below the limit. |
Thu Jun 27 11:09:14 2024, Liu, Update, Scripts/Programs, Straight edge STEP files and ray loss analysis
|
Drawings and CAD models of the straight-edge designs are exported, and are visualized in SOLIDWORKS. Two are attached. One is a single edge of the evenly
spaced polygon design with 16 edges, and the other is the 8x2 design, with two neighboring edges grouped together to replace the original single curved
heater.
For the straight edge design in COMSOL, ray power detectors were placed at the heater's front surface. The irradiance is shown in |
Wed Jun 26 16:39:34 2024, Luke, Update, VAC, Vacuum chamber leak checking
|
On Tuesday I had isolated the main volume and let it pump down over-night. Today, Wednesday, I checked it and it had only gone down by a small amount compared
to when I left it on Tuesday.
I then proceeded to tighten down the bolts attaching the tubo-pump to the zero-length reducer while it was under vacuum.
This caused the pressure to drop down a few orders of magnitude. |
Thu Jun 20 18:01:11 2024, Jon, Infrastructure, Computers, New workstation ws3 in 1129
|
I have repurposed a spare Intel NUC to serve as the first of two planned workstations in 1129. Today I set it up with a fresh installation of Debian 12.5,
assigned it the static IP address 192.168.1.15, and installed the LIGO CDS workstation packages. It is assigned the host name ws3.
Temporarily, the
mouse is borrowed from ws1 in 1119. We need to order another mouse as well as a 25-ft Ethernet cable for connecting the workstation to the 1129 switch, |
Wed Jun 26 15:33:41 2024, Jon, Infrastructure, Computers, New workstation ws3 in 1129
|
Set-up of the first CDS workstation for 1129, ws3, is complete and the machine is ready for use. The login credentials are the same as the other lab
machines.
All that now remains is to install a permanent cable tray for running the new Ethernet cables between the electronics rack and bench (they are |
Tue Jun 25 17:19:42 2024, Luke, Update, VAC, Vacuum chamber leak checking
|
Currently our main leak is in the RGA line. We found this by closing the gate valve from the main volume to see if which side was leaking more.
After
identifying this we are pumping down the main volume to see how low it can go the third attachment was taken at 4:16 6/25/24. Pumping started around 3:15.
We have not been able to find exactly which flange is leaking, but our guess is on the small blanks and where the cube attaches to the gate valve |
Tue Jun 25 12:34:18 2024, Shane, Update, Cleanroom, cleanroom cleaning and particle count
|
[Luke, Shane, Xuejun, Mohak, Michael, Tyler, Cynthia]
cleaning cleanroom and particle count
10:45 am: ran zero count test on particle counter
11:02 am: started particle count
zone 3: 0.3 u: 32840.5
u: 12471.0 u:332
zone 4: 0.3 u: 18290.5 u: 5811.0 u: 207
11:15 |
Mon Jun 24 21:38:25 2024, Pooyan, Infrastructure, Computers, Computer server changes in 1119 and 1129
|
[Jon, Pooyan, Tyler]
A few computer machine changes have been made. |
Mon Jun 24 14:28:51 2024, Cynthia , Update, Interferometer Simulations, SIS cavity with thermal effect
|
tried to run a cavity scan with thermal deformation and ring heater for ITM04 ETM08 (aLIGO mirrors). Not sure about the accuracy of the graph as there is
some commands that still need to verified. |
Fri Jun 21 11:47:30 2024, Liu, Update, Scripts/Programs, COMSOL simulation on alternative straightened heater elements design 6x
|
In the previous post, we saw that for the heater element design with straight
edges in replacement of the current eight-element ring-like design, it provides the similar Gaussian-like irradiance profiles, but with smaller power delivery
efficiencies, as shown in the plot. This turned |
Wed Jun 19 18:45:14 2024, Luke, Update, , Vacuum chamber reassembly
|
[Luke, Aiden, Mohak , Tyler]
On Tuesday we had the silver screws for the spherical cube shortened by a quarter of an inch so that they would fit into
the gate valve. We then attached the spherical cube to the vacuum chamber.
On Wednesday we finished assembling the RGA line and the main turbo pump.
|
Mon Jun 17 11:47:46 2024, Liu, Infrastructure, General, Temporary cooling units for the labs
|
Below are the temporary cooling units installed last week in labs 1119 and 1129. They are the temp. replacement for the building AC system, which will be
shut down during the Physics roof replacement. |
Fri Jun 14 13:32:13 2024, Liu, Update, Scripts/Programs, COMSOL simulation on rectangular heater elements design 6x
|
I have been looking at the feasibility of an alternative heater element design for FROSTI that replaces the original ring-like heater elements with n
rectangular elements with straight edges. They form an n-sided regular polygon that could well approximate the original annular ring if n is large enough.
This eliminates curved surfaces requirement for the heater elements, which was the source of the many month production delay for the prototype parts. |
Mon Jun 3 14:14:39 2024, Tyler, Update, FLIR, Initial CIT FROSTI Analysis
|
[Tyler]
Attached below are the initial results of the CIT FROSTI testing analysis.
|
Mon Jun 10 14:52:38 2024, Tyler, Update, FLIR, CIT FROSTI Analysis Update
|
[Tyler]
Upon further inspection, one adjustment was made to the FROSTI profile analysis: changing the transmission value of the ZnSe viewport. It
was initially assumed that the viewport possessed an AR coating, which would bring the transmission into the 90% range. Without the coating, it drops to
roughly 70%. Assuming no coating, the estimated delivered power was calculated to be 11.7 W. This is consistent with the estimated power given from the |
Mon Jun 3 14:59:44 2024, Cynthia, Update, Interferometer Simulations, Created cavity scan with LG modes
|
|
Mon Jun 3 09:24:48 2024, Aiden, Update, VAC, Vacuum Chamber Rendering
|
Here is a new render of the vacuum chamber that includes the 2.75 tee to place the Argon leak right next to the RGA. The conical reducer under the spherical
cube was also replaced with a 4.5 blank. The height from the bottom of the blank to the bottom face of the chamber is 5.45". With the chamber now on 1"
standoffs, we will need a support with a height of 6.45". |
Fri May 31 19:37:47 2024, Luke, Update, , Vacuum chamber Disassembly
|
[Luke, Aiden, Jon, Michel, Tyler]
Work done:
On Tuesday (5/28) we removed the RGA line with minimal difficulty. On Wednesday (5/29) we removed the turbo
pump, which had a few bolts that we needed to cut. We borrowed a dremel with ceramic blades from the machine shop to help remove some of the bolts. On
Thursday we moved the vacuum chamber onto the floor to check and resecure the heating band on the bottom of the vacuum chamber. We then relocated the posts |
Thu May 16 15:23:14 2024, Shane, Update, Cleanroom, Cleanroom cleaning and particle count
|
[Luis, Michael, Luke, Shane]
cleaning cleanroom and particle count
1:45 pm: ran zero count test on particle counter
1:50 pm: started particle count
zone 3: 0.3 u: 2660 0.5
u: 3321.0 u: 41
zone 4: 0.3 u: 81060.5 u: 24941.0 u: 831
2:08 |
Mon May 13 14:53:29 2024, Peter, Update, VLC Update, VLC
|
VLC Update WEEK 7 attached below |
Mon May 13 14:48:27 2024, Aiden, Update, VAC, New Vacuum Chamber Design
|
I created a new model for the vacuum chamber based on the ideas from last week's meeting.
It should be noted that we can not have the zero length
reducer and the gate valve on the same arm as they both have blind tapped holes. We need to decide if we want the gate valve or not as if we do, we will
need to use the 3 inch long reducer.
Important Measurements:
From the back of the flange to the back of the RGA: 25.25 in
Height from |
Mon May 13 13:03:41 2024, Tyler, Update, FLIR, Readout Code Updates
|
[Tyler]
Some changes have been made to the FLIR readout code to help improve its functionality:
More accurate temperature readings
than before due to updates in the calculation procedure. A bug was causing one of the parameters to not update correctly; this is now fixed.
Saved
data now stored in HDF5 files rather than CSV.
User can now enable automatic data storage by specifying a collection interval (in minutes). The |
Tue May 7 20:34:31 2024, shane, Update, CDS, frosti MEDM screen update
|
[Luis, Shane]
Here is the updated MEDM screen, with new orientation and updated labeling to reflect the actual positions of the heater elements. Note that
indices start at T0 to be consistent with simulink model, though in the previous elog for the FROSTI layout the heater elements are labeled 1-8.
Also,
we finally learned how to take a screenshot on debian. |
Thu May 2 22:43:36 2024, Tyler, Update, Electronics, RTD Readout Chassis Redesign
|
[Tyler, Jon]
Today the FROSTI RTD readout chassis underwent a redesign:
Instead of the original ratiometric method, which involved wiring the FROSTI RTDs in series, each element is individually powered by separate
excitations. Each element additionally possesses its own reference resistor of 100 Ohm. Now, if an RTD experiences an electrical short, it should not affect |
Mon Apr 22 15:06:33 2024, Cynthia , Update, Interferometer Simulations, cavity scan update
|
[Cynthia,Pooyan]
Completed some simulations injecting 0-10th order modes. Some graphs will be used for the poster after some further titles, axis, and
range adjustments. |
Wed Apr 17 15:07:04 2024, Shane, Update, Cleanroom, Cleanroom cleaning and particle count
|
[Mohak, Luke, Luis, Shane, Cynthia, Michael, Xuesi]
cleaning cleanroom and particle count
NOTE: particle counter was found dead, with the charging dock unplugged. For future reference, if you need to unplug
the dock, please either plug it back in when you're done, or make a note in an elog so someone else can come down and charge it. |
Mon Apr 15 15:25:10 2024, Cynthia, Update, Interferometer Simulations, progress on simulation so far
|
|
Mon Apr 15 11:51:03 2024, Peter, Update, VLC Update, VLC
|
An update on the VLC project is attached below: |
Mon Apr 8 14:57:41 2024, Cynthia, Pooyan, Update, Interferometer Simulations, performed cavity scans for O4 O5, and coupled cavity
|
|
Mon Apr 8 14:43:29 2024, Pooyan, Update, Interferometer Simulations, SIS update single and coupled cavities
|
[Pooyan, Cynthia]
Attached is a brief recap PDF file. A video file showing separate HOMs plots for the cavity scan with ETM08 surface map is also
attached.
The codes are available at https://git.ligo.org/uc_riverside/hom-rh/-/tree/main/SIS |
Sun Apr 7 13:42:51 2024, Michael, Update, Interferometer Simulations, Update on status of gtrace project
|
[Pooyan, Michael]
After meeting and discussing the current state of our work with Prof. Fulda a few weeks ago, we have decided that the best next
step for the gtrace project is its integration into finesse work. Our first step towards this integration involved creating a sequential beam trace in
contrast to the previous non sequential gtrace simulations. A sequential beam trace not only allows for faster runtimes of the simulation ( |
Wed Mar 27 00:03:57 2024, Pooyan, Update, Computers, Chimay relocation to Physics 1129
|
[Jon, Pooyan]
Moved Chimay from the server rack in Physics 1119 to a new rack in Physics 1129. It is connected to the switch in that rack
and has the same ip address as before.
All services are up and running.
It appears that JupyterHub creates some processes whenever a user
connects to an instance of it, but in some cases does not stop those processes after the user is not using that instance. This results in having lots of |
Sun Mar 24 11:50:37 2024, Aiden, Update, Clean & Bake, Cal Tech FROSTI Parts
|
Bagged the FROSTI legs and feet after the conclusion of the clean and bake. They are double bagged and sitting in the flow bench. |
Sun Mar 24 11:49:27 2024, Aiden, Update, General, FROSTI RGA Scan
|
Took RGA data 1 day after the conclusion of Bake 13. Bake 13 ended on Saturday March 23, the RGA data shown was taken on Sunday March 24. The scan shows
that the FROSTI is very clean with no outgassing. The HC levels are at 25 e-10. The pressure in the chamber was also a 1.64 e-8 Torr. |
Tue Mar 19 15:22:27 2024, Aiden, Update, Clean & Bake, FROSTI Legs Clean and Bake
|
[Aiden, Luke]
Cleaned and baked the Cal Tech FROSTI legs and showed Luke the procedure on how to clean parts. |
Tue Mar 19 10:55:30 2024, Tyler, Update, FLIR, In-Air Optical Test
|
Below is an image I took using the FLIR just before leaving for the LVK meeting. The profile is roughly what we would expect (annular). Any distortions
seen are likely from the screen not being completely parallel to the plane of the FroSTI (i.e. the screen slightly bends in various locations). Next step:
In-vacuum test at CIT. |
Fri Mar 15 16:58:55 2024, Aiden, Update, VAC, Vacuum Chamber Frosti Testing
|
[Luke, Luis, Aiden]
On Thursday, March 14 - Took preliminary RGA scans of the empty chamber to compare later on. Vented the chamber and placed the FROSTI
into the chamber. Plugged in the DB-25 connectors into the feed through port and checked the connection to make sure there were no shorts before closing
the chamber and starting the pumps again.
On Friday, March 15 - The pressure in the chamber has come down to 7 e-6 torr. It seems to be coming down |
Wed Mar 6 09:57:52 2024, Tyler, Update, TCS, FROSTI Wiring
|
Upon finishing the FROSTI assembly last week, we ran into some electrical issues. An electrical short was found between two of the d-sub pins (2 and
8). It appears that the pins were somehow coming into contact with the aluminum surrounding them. This was causing the power supply to trip. The issue
was seemingly fixed by adjusting the positioning of the cabling leading out of the reflector. When handling the device in the future, please make sure |
Thu Feb 29 17:16:48 2024, Shane, Update, CDS, MEDM screen for FROSTI T/P readouts
|
Here's the latest draft of the MEDM screen for the FROSTI temp and power readouts, now with a button linking to the c1msc file display. Size/color/label
are all changeable, if adjustment is needed. Checked in execute mode as well, and it's working correctly. Also noticed that the MEDM file name has been
changed to FROSTI.adl, which I'm noting here for future reference. Still in medm_sandbox directory. |
Mon Feb 26 21:23:27 2024, Jon, Update, TCS, FROSTI Assembly - Day 1 7x
|
[Jon, Tyler, Luis, Luke, Mohak, Cynthia, Michael, Aiden]
FROSTI assembly began today. After a final set of RGA scans were taken, the vacuum chamber
was vented and the reflectors were removed. The chamber was then resealed and pumped down again.
Today we completed the installation of the Macor hardware and heater elements between the two reflector halves. Tomorrow we will route, bundle, |
Wed Feb 28 17:49:18 2024, Tyler, Update, TCS, FROSTI Assembly - Days 2-3
|
[Aiden, Jon, Luis, Luke, Michael, Tyler]
FROSTI assembly was completed today. The RTD and power wires were terminated at the DB-25 connectors and
the legs were put on. It is currently placed in front of the stand-in test mass (~5 cm away). The FLIR has also been moved back to it's nominal position.
As of now, it appears there are some shorts within the power cabling. This will be a focus of tomorrow's work.
|
Wed Jan 17 15:47:49 2024, Aiden, Update, General, Resistors for Heater Elements
|
Power Res (Ohm) RTD Res (Ohm)
Heater 1= 73.6; 81.8
Heater 2= 70.4; 82.1
Heater 3= 71; 84.5
Heater 4= 71.5; 80
Heater
5= 70.5; 81.7
Heater 6= 72; 79.4
Heater 7= 69.2; 78.2
Heater 8= 71.1; 84.2 |
Wed Feb 28 12:02:08 2024, Tyler, Update, General, Resistors for Heater Elements Update
|
Power Res (Ohm) RTD Res (Ohm)
Heater 1= 72.8; 80.6
Heater 2= 69.5; 80.8
Heater 3= 70; 83.2
Heater 4= 70.6; 78.7
Heater
5= 69.9; 80.6
Heater 6= 71.1; 78.2
Heater 7= 68.5; 76.8
Heater 8= 70.1; 82.8
Quote:
|
Tue Feb 27 09:06:29 2024, Cynthia , Update, Interferometer Simulations, cavity scan with higher order input laser
|
I performed a few cavity scan with the inputing laser with a different mode (not pure 00). For each laser I included a graph for just plotting the order
with highest power (for example 1st order laser input the first plot only scanned for 1st order in that cavity), and I have also included a graph scanning
for order 1-10. |
Tue Feb 27 03:26:28 2024, Michael, Update, Interferometer Simulations, Reverse aLIGO Layout Created in Gtrace
|
I've created the simulation for reverse aLIGO layout in gtrace. Attached are the desmos model and the output dxf file. From here Pooyan and I plan to create
a brief report of our progress to the CE optical design group. |
Mon Feb 26 15:15:39 2024, Aiden, Update, General, Vacuum Chamber Baking Update
|
Started Bake 12 on Wednesday Feb. 21 and turned the bake off on Saturday Feb. 24. This was a normal low temp bake with the PID controllers set to 110 degC. |
Sat Feb 24 08:53:38 2024, Jon, Infrastructure, Computers, Matlab upgraded to 2023b on Chimay
|
I upgraded Matlab on chimay to the latest stable release, 2023b. From some quick tests, it appears to be in working order. Let me know of any issues. |
Fri Feb 23 18:03:27 2024, Tyler, Update, FLIR, Optical Test Setup in Cleanroom
|
[Tyler, Xuesi]
The FLIR and test mass stand-in have been transferred into the cleanroom. A software test will be run as soon as we get an ethernet
cable long enough to reach into the cleanroom where the camera is set up. Once this is finished, the FLIR will be moved aside for construction of the FROSTI!
When completed, the camera will be placed back into position for in-air optical testing.
|
Fri Feb 23 15:01:48 2024, Shane, Update, CDS, Latest draft of MEDM screen for FROSTI readouts
|
Here's the latest draft of the MEDM screen for the FrOSTI temp and power readouts. Also, debugged the text readout boxes so they're now correctly reading
out the live temperature and power values. |
Thu Feb 22 21:48:16 2024, Jon, Update, VAC, Vacuum vent for RGA testing of reflector
|
[Jon, Tyler, Luke, Aiden]
Summary
Following Wednesday's cleanroom cleaning [333],
we proceeded to vent the vacuum chamber, remove the heater elements and their mount structure, and install the FROSTI reflectors. The reflectors are the
final components to undergo RGA testing before the FROSTI prototype can be assembled. After installing the reflectors, we pumped the chamber |
Wed Feb 21 23:15:07 2024, Michael, Update, Interferometer Simulations, Long Shoelaces 1 Layout Created in Gtrace and Fixed Ghosting in Beamsplitter
|
I have created the long shoelaces 1 layout for cosmic explorer using gtrace, a slight modification from the shoelaces 1 layout design. I also modified the
simulation code slightly to remove ghosting effects in the beamsplitter. Originally the python code specified that the HR and AR sides of the beamsplitter
both have the same transmission/reflection. I modified this to the ideal case of: Refl_AR = 0, Trans_AR = 1. I have attached two images below to show the |
Wed Feb 21 11:58:30 2024, Shane, Update, Cleanroom, cleanroom cleaning and particle count
|
[Luke, Shane, Tyler]
cleaning cleanroom and particle count
11:50 am: ran zero count test on particle counter
11:55 am: started particle count
zone 3: 0.3 u: 17870.5
u: 5811.0 u: 166
zone 4: 0.3 u: 6230.5 u: 2901.0 u: 124
12:17 |
Tue Feb 20 18:08:24 2024, Aiden, Update, General, Degassing the RGA
|
I took an RGA measurement before and after degassing the RGA. Both data was taken with the Argon open. The pressure before taking data was 2.39 e-8 torr
in the main volume. Note that the main chamber was fully valved off for the degas and the main chamber pressure quickly rose to e-6 torr. Further investigation
of this rise should be done as this might be the main culprit for the leaking. |
Tue Feb 20 11:31:49 2024, Tyler, Update, Cleanroom, Garment Cabinet Door Replacement
|
[Luis, Luke, Pooyan, Tyler]
The replacement door for the HEPA garment cabinet arrived last week, and was installed on Thursday. However, it looks
like there's a small gap between the door and where the hinge is attached to the cabinet frame. No screws were provided with the replacement door. If we
want to perform any adjustments, we have to be very careful; the screws break very easily.
|
Mon Jan 15 22:29:34 2024, Jon, Infrastructure, General, Cabinet installation & lab clean-up completed
|
[Jon, Tyler, Aiden, Shane, Pooyan, Michael, Cynthia, Luke]
On Wednesday, we completed long list of work towards making the new lab (1129) fully operational and enabling the next phase of FROSTI testing.
Cabinet Installation
Three new VWR cabinets with sliding glass doors were installed in 1129. Each unit measures 48" |
Tue Feb 20 08:01:30 2024, Jon, Infrastructure, General, Power and network equipment installed in 1129 rack
|
[Jon, Tyler, Pooyan, Luis, Luke, Peter]
On Thursday we installed the power conditioning/distribution equipment and networking equipment in the new 1129
rack. The hardware is identical to the setup in the 1119 rack and includes:
Tripp Lite SU5KRT3UTF - 208V, 5kVA on-line UPS with 120V transformer
CyberPower PDU20M2F12R - metered power distribution unit, |
Mon Feb 19 14:40:21 2024, Shane, Update, CDS, MEDM screen for FROSTI temp readouts
|
Here's the latest draft of the MEDM screen for the FROSTI heating elements' temperature readouts. Note that the MEDM screen isn't actually this grainy,
this just happens to be a photo of the lab monitor's screen off a phone. |
Mon Feb 19 14:17:50 2024, Aiden, Update, VAC, Heater Element RGA Scan
|
Three days after the completion of Bake 11, the Heater elements RGA scan looks much cleaner. The HC level is back down to 33 e-10 torrl/s with the pressure
at 2.13 e-8 torr. I could not take a= scan with the Argon closed as it was left open during the bake and not closed since then. |
Fri Feb 16 18:37:28 2024, Jon, Update, VAC, Bake ended 6:23 pm
|
I ended the bake of the UHV system (that began on Monday) at 6:23 pm today by switching OFF both PID controllers. The heaters elements were run at max
power (24 V DC / 200 mA per element) during this bake, and I left them powered at the same level.
At the time, the instrument readings were as follows: |
Tue Feb 13 13:02:41 2024, Pooyan, Update, Interferometer Simulations, Cacity sacn of Fabry-Perot
|
Created a simple model of Fabry-Perot cavity in SIS, and did a cavity scan. Total power in the cavity, 00 mode, and HOMs is measured. |
Tue Feb 13 12:34:04 2024, Aiden, Update, VAC, VAC Heating System Update
|
Here is an overlay with for all the heating steps done with the heater elements. |
Tue Feb 13 12:26:23 2024, Tyler, Update, Interferometer Simulations, BS Code Update
|
I reproduced Cao's CE beamsplitter code (see below for example plots). I received the current info on the beamsplitter parameters for A+ and A# from
GariLynn also. The next steps are to perform a similar power loss analysis on the anticipated A# beamsplitter. |
Tue Feb 13 11:54:45 2024, Tyler, Configuration, FLIR, In-Air Optical Test Configuration
|
Below is the proposed schematic for FROSTI optical testing, chosen so enough space is allotted for prototype assembly.
Steps to be taken include:
Reconstruct FLIR staging apparatus
Move test mass stand-in to cleanroom
Mark FLIR camera position on cleanroom |
Tue Feb 13 04:05:32 2024, Michael, Update, Interferometer Simulations, Shoelaces 1 Layout Simulated in GTrace
|
I've worked on and have completed a first simulation of Cosmic Explorer's Shoelaces 1 layout. This is based off of Pooyan's original work with Gtrace much
like the Long Crab 1 layout I worked on last week. This layout will allow me to quickly created the alternate shoelaces layouts. I've included an image
of the dxf, and a desmos model for reference. |
Tue Feb 13 01:26:30 2024, Peter, Update, Interferometer Simulations, CARM Power Simulations
|
Cao's simulations of the circulating power and gouy phase through a single arm cavity of the interferometer have been reproduced. Images of the plots can
be shown in the pdfs attached. There are approx. 400 lines in this code (scenario_3_carm) that produces these plots. This code also calls on a separate
code source file (thermal_models) that defines many of the functions used in this main simulation. The thermal_models file consists of over 1000 lines. |
Mon Feb 12 17:35:47 2024, Aiden, Update, VAC, Heater Element RGA Scan
|
Took more RGA data before and after increasing the heater elements to 300 degC and before heating them up.
Started Bake 11 as well to hopefully prevent any hydrocarbons from getting captured by the room temperature walls of the chamber. The PID controllers
were set to 100C. |
Thu Feb 8 17:37:48 2024, Aiden, Update, VAC, Heater Element RGA Scan
|
Took more RGA data now that the heaters are powered by 18V. The pressure of the system during the data taking was 3.8 e-8 torr. The RGA scans seem to have
gotten worse as well with this power increase. |
Wed Feb 7 12:43:22 2024, shane, Update, Cleanroom, cleanroom particle counts (full 5 zone measurement)
|
Here's today's full 5 zone measurement of the cleanroom. Everything is back under the requirement. |
Tue Feb 6 22:40:25 2024, Michael, Update, Scripts/Programs, Long Crab 1 Design Created In Gtrace
|
Worked on and completed the python code for the simulation of the Long Crab 1 layout for Cosmic Explorer basing off of Pooyan's original work with the Crab
1 layout. From here I'll look into creating the shoelaces layouts. |
Mon Feb 5 14:17:52 2024, Aiden, Update, VAC, Heater Element RGA Scan
|
Here are the new RGA scans for the powered Heater elements. The pressure at the time of taking data was 2.88 e-8 torr. The HC levels are at 40 e-10 torrl/s
which is not bad but still higher than the lowest we have recorded. |
Fri Feb 2 19:18:24 2024, shane, Update, Cleanroom, cleanroom cleaning and particle count
|
[Aiden, Shane, Luis, Luke]
cleaning cleanroom and particle count
5:10 pm: ran zero count test on particle counter
5:14 pm: started particle count
NOTE: initial counts
are significantly above allowed limit. ~10 times larger than ISO class 5 standard in the smallest size range. Realized partway through ceiling tile changes |
Fri Feb 2 19:08:20 2024, Aiden, Update, VAC, 1st Hot Element RGA Scan
|
Here are the measurements for the RGA scan of the elements while on at around 160C. The pressure of the chamber during the test was 4.12 e-8 torr. |
Fri Feb 2 16:56:56 2024, Jon, Update, CDS, RTS model implemented for FROSTI RTD readouts
|
Summary
Today I finished implementing an RTS model to read out the integrated FROSTI RTDs (temperature sensors) via the CyMAC. The model is
named "MSC" and is located at cymac:/opt/rtcds/usercode/models/c1msc.mdl. We successfully tested it with the heater elements operating in vacuum at low
power (12 VDC), finding them to reach an average steady-state temperature of 160 C. |
Wed Jan 31 14:37:26 2024, Shane, Summary, CDS, path directions for CyMAC model and parts library
|
Path to cds parts library in Matlab simulink: /usr/share/advligorts/src/src/epics/simLink. File name CDS_PARTS.mdl
Path to user models: /opt/rtcds/usercode/models,
using file name c1msc.mdl |
Tue Jan 23 12:17:41 2024, Tyler, Update, Electronics, RTD Chassis
|
After updating the wiring in the RTD Chassis, a signal is now seen at each ADC input. However, there seems to be a discrepancy between the voltages
I measured out with the multimeter (see below). Next steps include:
Finish final debugging
Calibrate ADC inputs with known voltage source (likely to use DAC).
Voltage Readings:
|
Tue Jan 30 11:36:19 2024, Tyler, Update, Electronics, RTD Chassis
|
Quote:
After updating the wiring in the
RTD Chassis, a signal is now seen at each ADC input. However, there seems to be a discrepancy between the voltages I measured out with the multimeter (see |
Thu Jan 18 18:06:49 2024, shane, Update, Cleanroom, cleanroom 5 zone particle count measurement
|
Here's today's full five zone measurement of the cleanroom |
Thu Jan 18 15:13:37 2024, Aiden, Update, VAC, VAC Heating System Update
|
[Aiden]
Took more data today and the chamber and elements are showing an even lower HC level than we have gotten before. It is safe to say that the
elements are not contaminated and out gassing HC into the chamber. |
Tue Jan 16 16:11:41 2024, Aiden, Update, VAC,
|
[Aiden,Luis]
Below is the data for the most recent bake. I believe the chamber is cleaner than it is actually showing as the RGA data was still getting
lower while the data was being taken. I will take the data again tomorrow just in case. Still, the data shows that the chamber is basically as clean as
it was before bake 10 and this means further power testing can proceed.
Helium leak tested the chamber again today to check if the sealant changed |
Mon Nov 20 10:10:50 2023, Tyler, Configuration, Electronics, RTD Logic/Schematic Diagrams
|
Below are a basic diagram of what the RTD measurement circuit logically looks like and an example schematic of the actual wiring. The schematic wiring
will be placed internally into a chassis, connected to the RTDs via DB25 cable.
Note: The DB25 Breakout Board connector is Female, not Male. |
Fri Dec 29 16:02:27 2023, Jon, Configuration, Electronics, RTD Readout Chassis
|
The custom front and rear panels for the RTD readout chassis arrived last Friday. I installed them in the chassis frame to check their fit. They fit
very well, so all that now remains is to complete the internal wiring and test the connections.
The chassis panel designs are archived to LIGO-D2300452 and LIGO-D2300453. |
Tue Jan 9 12:08:59 2024, Tyler, Configuration, Electronics, RTD Readout Chassis Update
|
Below is the current state of the RTD readout chassis wiring. Initial continuity tests seem good, will run through one more time to confirm.
Quote:
The custom front and rear panels for |
Tue Jan 16 12:20:21 2024, Tyler, Configuration, Electronics, RTD Readout Chassis Update 2
|
I performed another continuity test on the RTD chassis wiring, and everything seems to be set up correctly. The chassis should be ready for installation.
Quote:
Below is the current state of the |
Tue Jan 16 10:01:21 2024, Peter, Update, VLC Update, VLC Faraday Isolator and Mode Matching
|
Attached is a PDF of my weekly updates. |
Wed Jan 10 15:27:18 2024, Shane, Update, Cleanroom, cleanroom cleaning and particle count
|
[Aiden, Shane]
cleaning cleanroom and particle count
2:03 pm: changed sticky floor mats
2:05 pm: started particle count
zone 3: 0.3 u: 48630.5 u: 12051.0
u: 872
zone 4: 0.3 u: 19530.5 u: 7891.0 u: 457
2:35 |
Tue Jan 9 16:35:09 2024, Aiden, Update, VAC, VAC System Leak and Heating
|
[Luis, Luke, Aiden]
Leak tested each flange and weld and only found two flanges to have noticeable leaks with the electron multiplier on. These were
the turbo pump flange and the RGA flange that connects to the cross. The RGA one is rather new as it has not had a measurable leak before and it was around
2 e-8. We then applied the new sealant to these two flanges as directed by the instructions on the packaging.
Then after waiting a few minutes for |
Mon Jan 8 20:24:53 2024, Aiden, Update, General,
|
[Jon, Aiden]
Installed the heater elements into their fixture and prepped the cables by twisting the wires into pairs. We also installed the pins
onto the wires and placed them into the peek DB 25 connector. The installation tool we had did not fit the pin size we had so the pins needed to be installed
by hand by opening the connector and holding them in place. In the future we will need to make sure we twist the wires together, group them, and then splice |
Sun Dec 17 21:04:15 2023, Jon, Infrastructure, Clean & Bake, Clean and bake lab migrated to 1129
|
[Jon, Tyler, Aiden, Luke]
On Friday we completed assembly of the new stainless steel-topped benches in 1129. We then moved the clean and bake equipment from 1119 to its
new larger space in 1129. This included the HEPA flow bench, ultrasonic washer, deionized water drum, nitrogen tanks, and forced-convection oven. The oven |
Wed Dec 20 10:33:34 2023, Jon, Infrastructure, Clean & Bake, Clean and bake lab migrated to 1129
|
Update: I have completed permanent routing of the electrical cables. I also ran the ultrasonic washer's drain line to
the sink drain (the current hose does reach). The new clean and bake lab is now fully operational.
|
Tue Dec 19 15:45:05 2023, Aiden, Update, VAC, Vacuum Chamber Baking Update
|
Took RGA data for the macor parts inside of the chamber. With the Ar open the HC levels read 30 torrl/s which is around where it was before the bake. |
Mon Dec 18 15:51:49 2023, Aiden, Update, VAC, VAC System Heating Update
|
After letting the chamber cool down I put the electronics back on and turned the RGA element back on. No data has been taken yet as to let the pressure
continue to fall as the RGA is powered. |
Sun Dec 17 19:43:18 2023, Aiden, Update, VAC, Vac Heating Update
|
[Aiden]
I measured the temperature of the flanges where some of the electronics will go and I found that the RGA flange was at 55C and the two full
range gauges were at 65C. I also stopped bake 9 to cool down for measurement. |
Fri Dec 15 14:03:02 2023, Aiden, HowTo, VAC, Vacuum Chamber Opening
|
[Aiden]
1. Turn off the RGA filament and disconnect it.
2. Record the pressure and then close the angle valve and gate valve on the RGA line
to isolate it from the system.
3. Turn off the backing and turbo pump and let the turbo pump spin to a stop by slowly leaking the chamber. The slower
the safer.
4.Slowly open the vents on the chamber and the turbo pump. Making sure not to raise the pressure too fast.
5. Once done venting |
Mon Dec 11 16:20:17 2023, Jon, Summary, TCS, FROSTI Assembly Procedure
|
Below is the procedure we will follow to assemble the FROSTI prototype.
Install SS guide rods and bottom Macor spacers in bottom reflector
Install AlN elements on top of bottom Macor spacers
Install
upper Macor spacers on top of AlN elements
Feed unterminated power and RTD leads through slots in upper reflector
Install upper reflector, |
Mon Dec 11 12:58:57 2023, Shane, Luis, Update, CDS, DAC-ADC loopback test debugging
|
[Luis, Shane]
Working on debugging last week's weird results for the ADC-DAC loopback test for channels 14 and 15. With DAC output channels 12-15 connected
to ADC input channels 12-15: tried setting matrix coefficients for channels 12-15 to 1, and as with last week's results, DAC is outputting as expected
for all three channels and ADC is not reading in the signal (hovering around -4,-5) for channels 14 and 15. Channels 12 and 13 still reading in correctly. |
Thu Nov 30 13:50:32 2023, Tyler, Update, Lore, Workbench Assembly Completed
|
[Tyler, Luke, Aiden]
The workbenches are now completely assembled and put into their final places. Additionally, the tool chest has been moved.
|
Sat Dec 9 12:34:12 2023, Jon, Update, General, Electronics workshop migrated to 1129
|
[Jon, Tyler, Shane, Luis]
On Wednesday we completed the migration of the electronics workshop from 1119 to the large new workbenches in 1129. The two workstations pictured
closest to the front of the room are for electronics assembly and testing, while the two in the rear will house LIGO CDS workstations. We moved all of |
Fri Dec 8 11:15:21 2023, Peter, Update, VLC Update, VLC Assembly
|
The optics of the visible light cavity have been assembled. The mode matching telescope is folded through the two stirring mirrors at the corners shown
in the image below, with the first lens (f=0.2m) before the first stirring mirror, and the second lens (f=0.5m) between the two stirring mirrors. The distance
from the cavity to the edge of the table is 14cm. There is still some work to be done on the alignment of the cavity, as the beam does not seem to be completely |
Thu Dec 7 14:13:15 2023, Shane, Update, Cleanroom, cleanroom cleaning and particle count
|
[Aiden, Shane, Michael, Luke, Cynthia]
cleaning cleanroom and particle count
12:30 pm: ran zero count test on particle counter
12:32 pm: started particle count.
zone 3: 0.3 u: 59,488
0.5 u: 95611.0 u: 706
zone 4: 0.3 u: 77320.5 u: 19121.0 u: 290
|
Thu Dec 7 12:42:42 2023, Aiden, Update, VAC, Vacuum Chamber Baking Update
|
After leaving the RGA on for a few days the chamber has settled at 2.01 e-8 torr. I also have good news that the chamber looks to be even cleaner as the
HC levels are now the lowest they have been being at 26 e-10 Torr l/s. |
Mon Dec 4 21:27:53 2023, Shane, Update, CDS, ADC-DAC loopback test results
|
Here are the test results from today's ADC-DAC loopback tests. Channels 14 and 15 were the only ones behaving abnormally. Not sure what the issue is, but
needs further debugging. The DAC output was as expected for both of them, but the corresponding ADC inputs were the same regardless of what offset was
used (hovering around values of -4 and -5). NOTE: all measurements listed in the attached table are 'averages' in the sense that the ADC inputs and DAC |
Mon Dec 4 11:19:50 2023, Aiden, Update, VAC, Vacuum Chamber Baking Update
|
[Aiden]
Took some RGA data of the chamber after it has been cooling down. I do not believe that this data accurately shows the HC levels in the chamber
as the pressure is still above where it was at before the bake and was still falling. I believe more time is needed to let the pressure fall and for the
RGA filament to remain on to return to a point where the data can be trusted. |
Sat Dec 2 18:10:23 2023, Aiden, Update, VAC, VAC System Heating Update
|
[Aiden]
Turned off the heating tape today in anticipation to take more RGA data on Sunday or Monday morning before the meeting. |
Thu Nov 30 13:58:18 2023, Aiden, Update, VAC, VAC System Heating Update
|
[Aiden]
Came into the lab in the morning to check on the chamber heating. I decided to set the PID controllers to 110C rather than 120C as the chamber
lid and wall were reading near 140C. With the PID controllers at 110C the chamber lid and wall now read 126C and 132C. Currently the PID controllers are
placed on the cross in front of the RGA and the reducing nipple in front of the turbo pump. I believe this is a good equilibrium and will leave the tape |
Wed Nov 29 21:13:32 2023, Aiden, Update, VAC, VAC System Heating Update
|
Started Bake 8 today. Set the PID controllers to 120 C and will check in the morning for equilibrium temperatures for the lid and chamber wall. The chamber
pressure was 2.13 e-8 torr before taking off the full range gauges.
After the bake is done on Saturday it will be cooled down and RGA data will
be taken to measure the out gassing rate of the stainless steel fasteners inside the chamber. Then on Tuesday we will plan to vent and open the chamber |
Mon Nov 27 19:34:50 2023, Aiden, Update, Clean & Bake, Clean and Bake Batch 20 Bagging
|
Bagged and tagged bath 20 which included the macor hardware and place it inside the clean room on the table. |
Mon Nov 27 14:22:30 2023, Tyler, Update, Lore, 1129 Assembly Update
|
[Tyler, Michael, Luke, Cynthia]
The tabletops have been attached to the workbench frames. Unfortunately, one of the tabletops came out of the box
with a large scratch and small dent in the middle. One of the electric top shelves is ready to be attached to the undamaged table, but the other is yet
to be opened. Assembly will be completed Wednesday morning.
|
Wed Nov 22 15:46:50 2023, Shane, Update, CDS, DB25 signal connections for FROSTI heaters
|
[Shane, Jon]
Installed new DC smart switch in electronics rack, configured power connections. Images attached. Attached is a diagram of the male DB25 signal connections
to be used for FROSTI heaters. Also included below is table detailing pin and signal configuration.
|
Thu Nov 23 12:34:44 2023, Jon, Update, CDS, DB25 signal connections for FROSTI heaters
|
Update: I was able to put the FROSTI power controller on the lab network. It is connected to the switch in the top of the rack and is assigned
a static IP address of 192.168.1.12 and an NDS hostname of relay1.
The controller can be remotely accessed through an SSH command line interface as well as an HTML webpage, which can be opened from any web browser |
Tue Nov 21 22:09:44 2023, Aiden, Update, General, Testing Parts 8x
|
[Aiden, Luis]
Luis and Aiden vented the chamber today. We closed off the RGA section and then proceeded to open the the vent on the main body after
turning off the turbo and backing pump. We then opened the lid and placed in all the stainless steel hardware that will be used in evaluating the FROSTI
optics and heater elements. We also inspected the weldments before closing it up. Check the clean and bake data base where there is now a new section outlining |
Tue Nov 21 14:47:24 2023, Tyler, Update, Lore, 1129 Workbench Assembly Update 1
|
[Tyler, Shane, Mohak, Cynthia, Luke, Michael, Luis]
Started assembly of the workbench equipment today. We completed the stools, and have constructed the frames of each workbench. All that needs to
be added are the tabletops and the top shelves, which will be done on Monday. |
Mon Nov 20 20:45:16 2023, Aiden, Update, VAC, Leak Test
|
[Aiden, Luis]
Tested every weld and flange to find leaks. Only found that the flange on the turbo pump and reducing nipple was still at 2e-9
torr on the leak. The chamber still rose in pressure when the two gate valves were closed but no noticeable leak could be found on the lid or welds. |
Mon Nov 20 20:37:45 2023, Aiden, Update, VAC, Clean and Bake Batch 20
|
[Aiden, Luis]
Started to clean and bake the macor parts for the FROSTI reflector. Per LIGO documentation cleaned the macor in liquinox for 10 minutes and
put them in the oven at 200 degC for 24 hours. |
Fri Nov 17 14:06:01 2023, Shane, Update, Cleanroom, 5 zone particle count
|
Here's today's 5 zone particle count measurement for the cleanroom. Zone 5 (closest to back wall by fire cabinet) is still above the limit for the larger
size ranges; everything else is in good shape and roughly 10 times under the limit. Not sure why zone 5 is still so dirty (maybe some of the electronics
being stored in bags/bins on the upper shelf of the desk aren't clean?) but will focus cleaning efforts on this zone next time. |
Thu Nov 16 19:32:31 2023, Aiden, Update, VAC, VAC HC Levels Update
|
Took some more RGA data today and overlaid it with data taken from October 19. I added a red line that symbolizes where all amu peaks above 44 need to be
bellow as well as a black square around the 44th amu peak. The chamber is very close to being meeting LIGO's vacuum chamber standards. |
Thu Nov 16 17:12:42 2023, Luis, Shane, Mohak, Update, Cleanroom, Cleanroom cleaning and particle count
|
[Shane, Luis, Mohak]
cleaning cleanroom and particle count
3:37 pm: started particle count
zone 3: 0.3 u: 12050.5 u: 7481.0 u: 249
zone
4: 0.3 u: 14960.5 u: 7481.0 u: 290
3:57 pm: began surface check and wipedown, including |
Wed Nov 15 21:52:33 2023, Aiden, Update, VAC, Vacuum Chamber Baking Update
|
Took RGA data before running the degas mode. Made sure to close off the main volume before running the degas. And left the filament on. |
Thu Nov 9 13:48:47 2023, Aiden, Update, VAC, Vacuum Chamber Baking Update
|
After bake 7 was stopped on Wednesday morning (11,8,2023), I took RGA data of the chamber to compare to a later scan that will be done on Monday to make
sure the chamber has reached its lowest pressure. Below are the graphs. |
Fri Nov 10 08:32:34 2023, Jon, Update, VAC, RGA experiments
|
I ran a 3-minute degas cycle of the RGA filament for the first time yesterday (in this process, the filament gets very hot in
order to "boil off" settled particulate). I was surprised to see the pressure (of not just the RGA volume, but also
the main volume) rise from 2e-8 to 5e-6 torr.
This observation, |
Tue Nov 14 17:21:40 2023, Jon, Update, VAC, RGA best practices
|
As a follow up ELOG 261, I have received advice from one of the vacuum experts at LIGO Hanford
on best practices for our RGA:
For future RGA degassing, definitely keep the main volume isolated, since it |
Thu Nov 2 17:14:36 2023, Shane, Jon , Update, CDS, CyMAC set up permanentized
|
CyMAC connections have been finalized and made permanent. Also tested voltages, which are all looking good. Warning:
power is on. Do not touch power supply terminals or screws connected to grounding cables (see attached images 4 and 5; green wires on back of power supply
with black and yellow covers, and exposed positive and negative terminals on back of power supply). |
Mon Nov 13 11:23:54 2023, Jon , Update, CDS, CyMAC testing
|
[Jon, Shane, Luis]
My repair of the internal ribbon connecting the ADC to the adapter board resolved the timing signal problem. After this repair, we were able to
start the front-end IOP model and checked out the RTS diagnostic screens (pictured below). All indicator lights were green except for the DK flag (indicating |
Mon Nov 13 11:07:50 2023, Tyler, Update, VAC, RTD Analysis
|
After initial analysis from last week on a single RTD, I then extended to looking at all 8 in series with R_ref (set to 1 kOhm). Shown below are the
edge cases for the setup:
RTDs are all at ambient lab temperature. This would correspond to a minimum resistance value.
RTDs all read out 400 C. This gives the maximum resistance value.
|
Mon Nov 13 06:15:45 2023, Peter, Update, VLC Update, VLC Mode Matching
|
Weekly Updates Attached in pdf |
Fri Nov 10 14:16:04 2023, shane, Update, Cleanroom, new cleanroom zone diagram
|
since the vac system has been moved and made permanent, here's a new diagram of the cleanroom zones. The zones themselves haven't moved, but the diagram
has been updated to reflect the new set up of the cleanroom. |
Thu Nov 9 19:06:46 2023, shane, Update, Cleanroom, 5 zone cleanroom measurement
|
Here's today's five zone measurement, taken ~5 hours after the cleaning. Zone 5 (closest to fire cabinet and back wall) is a bit over the limit in all size
ranges (about 1500 particles in 1.0u size range over), and zone 2 is slightly over the limit in the 1.0u range, but everything else is under the requirement.
|
Thu Nov 9 13:57:58 2023, Shane, Luis, Aiden, Tyler, Update, Cleanroom, cleanroom cleaning and particle count
|
[Aiden, Shane, Luis, Tyler]
cleaning cleanroom and particle count
12:30 pm: Tyler and Aiden started organizing cables in cleanroom
12:35 pm: started particle count in flow bench
0.3 u: 116810.5 u: 32841.0 u: 1039
12:50 pm: started cleanroom particle count
zone 3: 0.3 |
Wed Nov 8 17:55:49 2023, Jon, Update, General, Lab Clean-Up Day 1
|
[Jon, Tyler, Shane, Peter, Luis]
Today we completed the first phase of lab clean-up. Activities included:
CF/KF parts stored under the cleanroom table were removed and transferred to Physics 1129
Cleanroom workbench cleared, with all |
Mon Nov 6 11:31:25 2023, Peter, Update, VLC Update, VLC Mode Matching
|
See Update Attached |
Mon Nov 6 11:29:24 2023, Tyler, Update, Electronics, Preliminary RTD Calculations, RP Software Update
|
Preliminary RTD calculations are shown below, given an input of 10 V and desiring a few mA of current. It looks like R_ref should be at least 1 kOhm
(refer to plots/circuit below), keeping in mind we need to have
RP: The Red Pitaya Software was updated to OS 2.00. All examples on the RP website should run without issue. |
Wed Nov 1 20:22:07 2023, Aiden, Update, VAC, VAC System Heating Update
|
Raised the PID controller temperature to 105C today as at that temperature the lid and the barrel temperature sensors were reading around 120C. I will check
again tomorrow to see if there is any room for increase after equilibrium. |
Wed Nov 1 18:24:01 2023, Shane, Update, CDS, CyMAC Power connections made
|
Finished power connections today for the CyMAC chassis. Images attached. Had to switch the shrink fork terminals on the
power supply cables to shrink ring terminals, but was able to get everything connected and secured. Upcoming work: turning on power supply and testing
voltages/checking everything is turning on and lighting up correctly.
Configuration is as follows:
Topmost Sorensen: +24V (reserved |
Tue Oct 31 19:46:35 2023, Aiden, Update, VAC, VAC System Heating Update
|
Started bake 7 on Monday but found issues with the heating as the cross in front of the RGA got way too hot too quickly. This resulted in shutdowns of the
heater tape while I could still only set the main PID controller for the lid to 75C. Tuesday I moved the PID controller sensors to be on the cross in front
of the RGA and on the Reducing nipple. I then placed the alarm sensors onto the lid of the chamber and the barrel. This should hopefully prevent excessive |
Mon Oct 30 18:15:13 2023, Shane, Update, CDS, CyMAC chassis mounted and progress on power connections
|
All CyMAC chassis mounted in electronics rack today, and shelf for monitor also mounted. Images attached. Assembled grounding cables for power connections,
and attached the timing chassis to power & gnd. Powered on successfully with correct voltages in expected places. After power test, everything was turned
off and unplugged. Next steps: attach grounding cables to other four power supply chassis. Also attach anti-aliasing, anti-imaging, binary input and binary |
Mon Oct 30 11:03:56 2023, Tyler, Update, Scripts/Programs,
|
FLIR: After some adjustments, the plot generated from the FLIR measurements look much more symmetric (see attachment). There are more included grid
points, which smooths out the curve as compared to last week.
Red Pitaya: It looks like a new OS update was released for the RP, which includes
a new Python API (was previously only available in C). I'm going to try and update the one we have currently running in lab.
|
Fri Oct 27 15:16:31 2023, Aiden, Update, VAC, Vacuum Leak Test
|
Leak tested the worst flanges on the chamber after moving it and after bake 6. The 6 inch flange connected to the 8 inch reducing nipple is now leaking
at 1.5 e-9, previously at 4 e-9. The 8 inch flange connected to the turbo pump is now leaking at 1.9 e-9, previously at 3 e-9. This means that the baking
most likely improved the seals on these flanges and a hotter bake might fix the leaks for good. |
Mon Oct 30 08:42:22 2023, Jon, Update, VAC, Vacuum Leak Test
|
By 5:30 pm Friday, the pressure had reached 8.6e-8 torr and was continuing to fall. So it seems we are OK to proceed with permanentizing this configuration
(cable routing, heater tape reinstallation).
|
Fri Oct 27 15:28:30 2023, Shane, Update, CDS, AA and AI chassis for CyMAC powered on and functional
|
CyMAC updates: Switched out the faulty power regulator boards in the Anti-Aliasing and Anti-Imaging chassis. Both chassis are now powering up correctly
with lights on and the correct voltages in/out of the power regulator board. Images attached. All chassis for the CyMAC now functional, so next step is
mounting everything in the rack. |
Thu Oct 26 13:00:45 2023, Aiden, Update, VAC, Vacuum Chamber Baking Update
|
Bake 6 was turned off on Monday. Tooke RGA data today and have posted the data below. The pressure of the chamber after taking data was 3.22 e-8 Torr. The
chamber HC levels are still not low enough but I feel with more pumping it will go down as the RGA scan was still slowly going down during the data taking. |
Mon Oct 23 18:02:23 2023, Shane, Jon, Update, CDS, Timing chassis assembly complete
|
Concluded assembly of timing chassis for CyMAC today; see attachment 1 for interior set up of chassis. Installed front and rear panels, wired on/off switch
and LED assembly, and tested to confirm everything is powering on correctly. Also tested the outputted timing reference that will go to DAC and ADC adapter
boards (see attachment 2 for output 1 and attachment 3 for output 2). |
Mon Oct 23 11:28:05 2023, Tyler, Update, Cameras, FLIR Camera Code Updates
|
The past week I've been spending time going through the FLIR code on gitlab. Initially, it had appeared that our measurements with the camera had differed
about 2 degrees C from what the thermocouple was giving (Ref ELOG 181). Upon inspection of the FLIR streaming code, I noticed a few issues:
1. The emissivity
value wasn't set correctly (was 0.999 originally, should be about 0.95).
2. The ambient temperature was set to about 21.6 C (71 F).
3. The distance given |
Mon Oct 23 07:28:57 2023, Peter, Update, VLC Update, VLC Mode Matching
|
I have attached a pdf with slides of my latest updates. |
Fri Oct 20 16:38:02 2023, Shane, Aiden, Update, Cleanroom, Cleanrooom cleaning and particle count
|
[Aiden, Shane]
cleaning cleanroom and particle count
3:16 pm: started particle count. NOTE: we are not within the ISO class 5 standard for any size ranges in zone
3. ~6000 above limit in 0.3 u, ~2000 above in 0.5, ~200 above in 1.0 |
Thu Oct 19 11:41:04 2023, Aiden, Update, VAC, Vacuum Chamber Baking Update 6x
|
[Aiden, Tyler, Mohak]
Took some RGA data when we came into the room. The pressure of the chamber was 8.63e-8 Torr before turning on the RGA filament.
We saw the usual spike in pressure when the filament was initially turned on. Took some data and saw that the chamber was definitely dirtier since the
vacuum upgrade. See figures below.
Put the heater tape back onto the section that was removed. We may need to rearrange the heater tape again |
Thu Oct 12 12:11:10 2023, Aiden, Update, VAC, Vacuum chamber Helium leak test
|
[Aiden, Tyler, Peter, Jon]
Continued tightening bolts on the turbo pump and 6"-8" reducer to reduce the leak. The final leak test values for the
turbo pump flange was 3.0 e-9 and the other 6"-8" reducer flange was 4.0 e-9.
We will continue to let it pump down as the screws could not
be tightened anymore. Looks like new gaskets will be needed to reduce the leaking on these flanges.
|
Wed Oct 11 20:47:11 2023, Jon, Update, VAC, Vacuum upgrade begins
|
[Jon, Tyler, Aiden, Peter]
Upgrade of the UHV system to a larger turbo pump began today. After obtaining a final RGA scan in the old configuration (Aiden to post), we vented
all three volumes and proceeded to disassemble the 4.5"-diameter pump line. We completed installation of the new 6"-diameter pump line to the point where |
Mon Oct 9 21:41:24 2023, Aiden, Update, Clean & Bake, Clean and Bake Batch 19
|
Bagged and tagged the parts from batch 18. Started the Copper batch that includes all the gaskets needed to start the vacuum chamber upgrade. |
Mon Oct 9 16:59:21 2023, Shane, Jon, Update, CDS, timing chassis power cable and AI chassis testing for CyMAC
|
[Shane, Jon]
Today's CyMAC work:
Finished assembling external power supply cable for the timing
chassis (see attached image)
Also did some debugging of AA and AI chassis re: power issues. After testing voltages at various test points
on the power regulator board (TP1-TP6) in the AA chassis, it seems like it's the source of the problem. Used bench DC power supply to test, running 15V, |
Mon Oct 9 11:29:37 2023, Tyler, Update, Electronics, PSD/CSD Plot Updates
|
Continuing from Sophia's SURF Project this summer: Plotting the Power-Spectral Densities (PSDs) and Cross-Spectral Densities of two signals.
A continued
issue that has been observed in the plots is the random "jump" of one PSD curves. Below, a 1.4 kHz signal is driven with a magnitude of 0.7 Vpp, and connected
to the two output ports of the Red Pitaya via an SMC T-Adapter. At the moment, I anticipate that this bug might have something to do with the Real-Time |
Mon Oct 9 11:06:17 2023, Peter, Update, VLC Update, VLC Launch Chain
|
Implemented the new stage for the EOM. Took power data at different positions in the launch chain. Beam waist: 0.066mm (beam waist is inside EOM). Power
before EOM: 0.473mW. Power after EOM: 0.452mW. Power after Faraday Isolator: 0.415mW. Might need to adjust better to configure for clipping losses. Images
of setup are attached below. |
Sat Oct 7 17:10:27 2023, Aiden, Update, Clean & Bake, Clean and Bake Batch 18
|
Bagged and tagged the parts from Batch 17 and placed them in the clean room on the optic table. Also started an aluminum batch of parts that included the
kf clamps and the heater mounting parts. |
Tue Oct 3 15:07:48 2023, Aiden, Update, Clean & Bake, Clean and Bake Batch 17
|
Cleaned and baked all the stainless steel parts in Batch 17. Check data base for more details on this. |
Fri Sep 29 17:27:30 2023, Shane, Jon, Update, CDS, Timing chassis assembly progress (CyMAC)
|
Worked on timing chassis assembly today for the CyMAC, settled on layout (see attachment 1). Frequency synthesizer and frequency divider tentatively mounted.
Next steps involve putting together and installing an LED and DC on/off switch assembly like the one in the binary input chassis (attachment 2 for comparison;
orange and black wires in BI chassis analogous to red and black wires in timing chassis). Will also use front and back panels of BI chassis as a template |
Fri Sep 29 11:53:54 2023, Shane, Update, Cleanroom, 5 zone particle count measurement in cleanroom
|
Today's 5 zone measurement of cleanroom particulate concentration is attached |
Fri Sep 29 11:22:33 2023, Shane, Aiden, Update, Cleanroom, cleaning and particle count
|
[Aiden, Shane]
cleaning cleanroom and particle count
10:06 am: ran zero count test on particle counter
10:07 am: started particle count
zone 3: 0.3 u: 22030.5
u: 8311.0 u: 540
zone 4: 0.3 u: 3740.5 u: 1241.0 u: 124
10:25 |
Thu Sep 28 15:17:13 2023, Aiden, Update, Clean & Bake, Clean and Bake Batch 16
|
Bagged and Tagged the parts from batch 15 and started baking batch 16 which includes the 6" to 8" reducer. |
Fri Sep 15 17:33:35 2023, Aiden, Update, VAC, Vacuum Chamber Baking Update
|
Took some more RGA data and see that the chamber has gotten much cleaner since monday. Next step would be another bake with some focus around heating the
RGA filament more. The pressure in the chamber before testing was 5.32 e-8 torr. |
Thu Sep 14 17:05:38 2023, Shane, Jon, Update, CDS, Timing chassis setup and testing
|
Tested the setup today for the timing chassis (intended to provide the timing reference for the CyMAC). Was able to read the correct frequency, but voltage
was significantly lower than needed. Still identifying source of problem, and looking into the relationship between the supportable ohm load and the voltage. |
Tue Sep 12 15:31:31 2023, Aiden, Update, Clean & Bake, Clean and Bake Batch 15
|
Cleaned and Baked the SS screws for the heater mount. Check the Clean and Bake data base on the website to get a precise list of the parts and their numbers.
Cleaned them with liquinox in the ultra sonic washer for 10 minutes. Then dried them with nitrogen. Then put the stainless steel parts into the oven for
the following steps; 1. Ramp to 100 C in 15 minutes 2. Dwell at 100 C for 30 minutes 3. Ramp to 200 C in 30 minutes 4. Dwell at 200 C for 48 hours 5. Turn |
Mon Sep 11 16:02:42 2023, Aiden, Update, VAC, VAC System Heating Update
|
The chamber has cooled down from bake 5 and I took the first set of data. The pressure measured during the RGA measurements reached 9.98 e-8 torr. The data
shows that the chamber got dirtier, however this has been the case for every first scan after a bake so I assume there are still some more hydrocarbons
to be vacuumed out and that the second scan will most likely give a better idea of where the chamber is at. After turning off the RGA the pressure immediately |
Fri Sep 8 16:10:43 2023, Aiden, Update, VAC, VAC System Heating Update
|
Turned off the PID controllers to let the chamber cool down. Final temperatures for the RGA cross and Turbo pump cross were 113 C and 80 C respectively.
The system should be cool enough to start taking measurements on Monday. |
Thu Sep 7 19:24:25 2023, Peter, Update, VLC Update, VLC Launch Chain
|
The launch optics up to the Faraday Isolator have been added to the breadboard. In the first image, the optics are (from L to R) the stirring mirror, half-wave
plate, polarizing cube, 100mm f lens, electro-optical modulator, Faraday isolator, 50mm lens (not part of final design), stirring mirror (not part of final
design) |
Tue Sep 5 16:43:19 2023, Aiden, Update, General, VAC System Heating Update
|
Checked on bake 5 today after 3 days of equilibrium. The RGA cross is at 106 C and the turbo pump cross is at 74 C. This was reached while the PID controllers
were at 140 C. I will now slowly raise the temperature to 150 on the PID controllers and see if the difference in the RGA cross can be reduced. |
Fri Sep 1 19:21:19 2023, Aiden, Update, VAC, VAC System Heating Update
|
Started bake 5 today. This will hopefully be a longer and hotter bake with it lasting 6-7 days at around 150 C. The pressure in the chamber before removing
the full range gauge and RGA box was 5.01 e-8 torr. The Argon leak was also left open for this bake to hopefully get rid of particulates on it. I also
put the heater tape I removed last time back onto the RGA cross. This made the heating up process take much longer as I had to not increase too much or |
Thu Aug 31 12:56:29 2023, Aiden, Update, VAC, Vacuum Chamber Baking Update
|
Took some more RGA data to see if the HC levels have further declined since bake 4 and it seems that it has started to plateau with August 29 160.7 e-10
Torrl/s and August 31 giving 158.4 e-10 Torrl/s. The pressure of the chamber before taking data was 5.1 e-8 Torr. I have attached an overlay of the data
from August 29 and August 31. It seems that the extra two days has not noticeably changed the data and another bake will most likely be needed to meet |
Tue Aug 29 22:07:38 2023, Aiden, Update, General, Electronic Bench
|
Dr Richardson is working on mounting more power supplies in the server rack and is using the electronics bench. Be aware to not move anything on the bench
itself. |
Tue Aug 29 19:09:21 2023, Aiden, Update, VAC, Vacuum Chamber Baking Update
|
Here are some more plots with the RGA data take August 29. It seems that more pumping time has led to the HC levels being dramatically reduced compared
to only a day ago. The pressure also rises significantly when turning on the RGA filament and it doe not go back down to the pressure before turning it
on while the RGA is still running. The pressure after I left was 6.86 e-8 torr. |
Mon Aug 28 14:43:50 2023, Aiden, Update, VAC, Vacuum Chamber Baking Update
|
The PID controllers were turned off on Friday and the chamber was left to cool over the weekend. Just took data and it looks like signal to noise ratio
is pretty bad again. I do not know if this means we need a hotter bake or if the chamber needs some more time to cool down. I will overlay this data and
make sure to take a second set a bit later to compare. Some good news though is that the chamber has reached a pressure below 10e-8 torr with the full |
Mon Aug 21 17:13:25 2023, Aiden, Update, VAC, Vacuum Chamber Baking Update
|
Came in to take RGA data and found the turbo pump drawing .38 Amps. This was much higher than what it was on Friday. I investigated and found that
the breaker had flipped controlling the power strip that the scroll pump was on. The scroll pump was thus not running. I flipped the breaker back and turned
the scroll pump back on. I do not know if this will be a reoccurring problem as this has happened before, or if this was due to the storm. Either way the |
Thu Aug 17 15:18:48 2023, Aiden, Update, VAC, VAC Heating System Update
|
Relocated the PID controllers so that the heating tape could be plugged in. In the picture the left one controls the top half of the chamber along with
the RGA line and has its sensor on the lid near a fold. The right one controls the bottom half along with the turbo pump line and the bypass line and has
its sensor on the barrel of the chamber. The chamber is almost ready to bake again and just needs to have the full range gauges and RGA electronics box |
Thu Aug 17 15:02:44 2023, Aiden, Update, VAC, VAC Heating System Update 11x
|
Put the heating tape back on and made sure to have 4 coils around the barrel of the chamber. To make this happen I did not put any heater tape on the
ports but made sure to place some of the heater no more than 1 inch away from the ports. Also re-placed some of the heating sensors. For the PID controllers
there is one sensor placed on the lid and one sensor placed on the barrel. For the temperature alarms one sensor was placed near the flange of the turbo |
Wed Aug 16 17:17:02 2023, Shane, Jon, Update, CDS, Binary input chassis powering correctly
|
Binary input chassis passed power-on test, and is lighting up as expected. Binary output chassis also successfully powered on. AA and AI chassis not powering
on correctly, need to do some debugging to find the problem. |
Wed Aug 16 16:55:40 2023, Shane, Jon, Update, CDS, external power supply cables finished
|
All four external power supply cables for the CyMAC chassis are now assembled. Using them now to test if chassis power up correctly. |
Tue Aug 15 16:10:06 2023, Celeste, Update, TCS, 8/15/2023 Simulation Progress
|
|
Tue Aug 15 16:04:23 2023, Aiden, Update, VAC, VAC Heating System Update 6x
|
Pulled off the rest of the heater tape along with the aluminum tape left behind. The aluminum tape adhesive left behind a ton of junk on the walls
of the chamber. This is probably due to excessive heating. In order to get the adhesive off I sprayed a vector alpha wipe with acetone and wiped down the
walls. This took a lot of acetone to get it off.
|
Tue Aug 15 13:32:37 2023, Sophia, Update, Scripts/Programs, Update on Laser Noise Data Collection and Analysis: Dynamic CSD and PSD Plots
|
I have now fixed all issues that I was having this morning, and have added text boxes which show the peak values of both PSD's and the CSD alongside the
graphs. They also update continuously with the graph. This is shown in the top image. The laser was driven at 400Hz, and had 0.5V peak to peak voltage,
both of which appear correctly in the below graphs.
Now that the code is almost fully working (we will finish debugging the screenshot method later |
Tue Aug 15 10:35:00 2023, Sophia, Update, Scripts/Programs, Update on Laser Noise Data Collection and Analysis: Dynamic CSD and PSD Plots
|
I have successfully added a button to my graphics, but it has posed a strange issue with the CSD and PSD values. When I plot my original code, I still see
the pretty peaks that I was getting originally, while my new code (as shown in the video and in the last screenshot) is giving me more of a line. In my
code that gives the peak values, the CSD values also tend to fluctuate in this new code as well (shown in the first screenshot), before returning to the |
Fri Aug 11 18:32:00 2023, Aiden, Update, VAC, VAC System Heating Update 11x
|
[Dr. Richardson, Aiden] Large Update
Removed most of the insulation on the chamber in order to pull back some of the heater tape to get
to the flange connecting the bypass line to the valve under the RGA line. Most of the heater tape on the bottom half of the chamber was pulled off and
the rest will need to be removed as well in order to place the start of the heater tape on the barrel of the chamber rather than one of the flanges.
Engaged |
Fri Aug 11 10:57:20 2023, Celeste, Update, TCS, 8/11/23 Simulation Progress
|
|
Thu Aug 10 18:32:39 2023, Aiden, Update, VAC, VAC System Heating Update
|
[Dr. Richardson, Aiden]
DO NOT TOUCH ANY VALVES ON THE CHAMBER. THERE IS A PRESSURE DIFFERENTIAL BETWEEN THE RGA LINE,
TURBO PUMP LINE AND THE MAIN VOLUME. THE TURBO PUMP WILL BE DESTROYED IF OPENED.
Closed the valves to the turbo pump line and RGA line.
Turned the turbo pump back on and saw that the pressure in the RGA Line and Turbo pump line was going down so there was no large leak within that line |
Thu Aug 10 14:36:00 2023, Aiden, Update, VAC, VAC System Heating Update
|
Came in to install one of the Full range gauges. Checked the temperature first of the cross and it was reading 30 C. After installing the gauge above the
RGA line the controller was reading 2E-1 torr. Installed the other full range gauge to confirm this and it also read that pressure. There may be a leak
so I will let it sit for a bit and then perform a Helium leak test. |
Thu Aug 10 15:10:12 2023, Jon, Update, VAC, VAC System Heating Update
|
I shut down the turbo pump since this is evidently a large leak. We CANNOT turn on the RGA for leak checking with the pressure above 1E-5 Torr.
I think
we will have to manually inspect it. The most likely cause would be that the Viton seal around the lid overheated and failed.
|
Thu Aug 10 14:13:38 2023, Celeste, Update, TCS, 8/10/23, Simulation Graphical Progress
|
|
Wed Aug 9 17:35:26 2023, Shane, Update, CDS, Binary output chassis finished
|
Finished the internal wiring for the binary output chassis today, which completes its assembly. Also secured ribbon cables and chassis lid with their respective
screws. Note: one of the spade lugs' internal metal piece is a little loose and had to be reinserted after falling out once. Seemed secure after this,
and I checked continuity on everything and it was all good. |
Wed Aug 9 11:32:56 2023, Jon, Infrastructure, General, New power cables
|
I delivered new NEMA 5-15 (120V / 15 A) power cables to the lab for the following items:
WS2 (cleanroom) cart - 10ft cable
Electronics workbench overhead LED - 10ft cable
Both PI heater controller sets - (2)
6ft cables
I installed the new cables on the WS2 cart and the workbench myself, and left the two 6ft cables (as pictured below) for Aiden |
Tue Aug 8 17:03:22 2023, Shane, Jon, Update, CDS, Binary input chassis finished
|
Finished assembly of the binary input chassis today, including DC on/off switch and LED installation. external cable assemblies still needed, but internal
work done. |
Tue Aug 8 16:47:11 2023, Sophia, Update, Scripts/Programs, Update on Dynamic CSD and PSD Plots
|
We have fixed our rapid plotting error, and realized that this has not been affecting our data intake! Below is a video of the code progressing, alongside
grabbed images of the raw data. The data is now continuous, and performs as we expect. Next, I plan to add a widget which will dynamically show the peak
values instead of them just being printed in the terminal after each iteration. (Ignore the red box-- it was from me struggling with a now fixed issue). |
Tue Aug 8 15:31:26 2023, Aiden, Update, VAC, VAC Heating System Update 10x
|
Vacuum Chamber equilibrium temperature for bake 3 are 126 C and 88 C for the chamber wall and turbo pump flange respectively. There were reached with
the PID controllers both being set to 150 C.
Also noticed some discoloration around the port insulation. It could be burned from being exposed
to the heater tape directly without insulation or it could be that the insulation, which looks much different, is depositing something around the ports.
The |
Mon Aug 7 15:36:18 2023, Sophia, Update, Scripts/Programs, Update on Laser Noise Data Collection and Analysis: Dynamic CSD and PSD Plots 7x
|
Today I was able to fix the red pitaya's plotting problem, and get my code to recognize driving frequencies from the function generator to within a 0.5
Hz estimation. The sinusoidal plots I have included are from sending a 1 Hz signal into the red pitaya to see the signal in real time. This allowed me
to see exactly where the system was messing up, and fix from the ground up. Once I had that working, I began to test sending in frequencies in the range |
Mon Aug 7 13:58:46 2023, shane, Update, CDS, internal power supply cables done for AI chassis
|
Finished assembling and installing the aLigo chassis internal power supply cables in the anti-imaging chassis today. Tested for continuity and everything
looked good. Chassis lid still secured with two temporary screws because I'm not sure what the correct size is. |
Fri Aug 4 15:21:33 2023, Aiden, Update, VAC, VAC System Heating Update
|
Checked on Bake 3 today and the temperature sensors read 126 C and 91 C for the chamber barrel and turbo pump flange respectively. These were reached while
the PID controllers were set to 150 C. |
Thu Aug 3 18:03:42 2023, Shane, Jon, Update, CDS, Anti-Aliasing chassis complete
|
We finished installing the internal power supply cables in the anti-aliasing chassis today, which concludes its assembly. Work on AI, BI, BO chassis still
underway. |
Thu Aug 3 17:47:51 2023, Aiden, Update, VAC, VAC Heating System Update
|
Did some further testing to determine if it was within reason to increase the temperature of the chamber. I used a thermometer and pulled back some
insulation to test many points on the chamber. Mainly focused on the barrel and the bottom lid of the chamber to see if it was possible to increase the
temperature of just the PID controller that is powering the bottom half of the chamber.
Found that the barrel of the chamber seems to be hotter |
Thu Aug 3 16:00:25 2023, Aiden, Update, VAC, VAC System Heating Update
|
Check on the temperature of the bake today to see the equilibrium temperatures. With both of the PID controllers set to 150 C, the temperature sensors for
the wall of the chamber and the flange in front of the turbo pump read: 125 C and 90 C respectively. At these temperatures the bake would need to last
at least a week unless the temperature were to be increased. |
Wed Aug 2 17:02:38 2023, Aiden, Update, VAC, VAC System Heating Update
|
Moved the temperature sensor on the PID controller to one of the switch backs on the lid.
Also started the next bake with both PID controllers
set to 150 degC. When leaving the temperature sensors above the chamber read 119 C and 83 C. These sensors are on the chamber wall and flange in front
of the turbo pump respectively.
|
Tue Aug 1 16:22:35 2023, Celeste, Update, TCS, Graphical Updates to HOM RH Modification, Tuesday 8/1
|
Slides 20-33 are newly added (data/graphs from parameter sweep feature-1/8th heater unit length varied from 10% of original to 100% of original). |
Tue Aug 1 15:44:31 2023, Sophia, Update, Scripts/Programs, Update on Laser Noise Data Collection and Analysis: Dynamic CSD and PSD Plots 6x
|
We have identified two problems facing the intensity noise calculations, which we are working to solve.
The first of these problems, is that the red
pitaya appears to be taking data approximately 4 times faster than we would expect from the decimation rate based on how quickly it runs. To see if this
was affecting our data, we plugged the red pitaya into a function generator. We found that my code is able to identify the driving frequency, but consistently |
Tue Aug 1 12:48:41 2023, Aiden, Update, Cleanroom, Pre Filter Change
|
Changed the pre filter inside of the 3 stage HEPA system next to the soldering station. It was rather dirty and I have attached images with a clean
filter on the left and the used one on the right. I reset the pre filter age on the system. I tried to see if I could tell if the HEPA filter was dirty
but I could not see it. I did not reset the age of the HEPA or UV stations. They are currently 378 days old.
|
Tue Aug 1 12:10:03 2023, Aiden, Update, VAC, Vacuum Chamber Baking Update
|
Dr. Richardson and I took off the insulation on the lid again to add more insulation in-between the heater tape folds in addition to what was added
on top of the tape after discovering discoloration. Also cleaned the lid with IPA wipes.
Also took more RGA data, one with the leak closed
and one with the leak open. The graphs below this show that the SNR is improving with the ratio now looking to be around 3. The chamber is still too dirty |
Mon Jul 31 19:27:30 2023, Sophia, Update, Scripts/Programs, Update on Laser Noise Data Collection and Analysis: Dynamic CSD and PSD Plots
|
An update on the CSD/PSD code:
The code is now taking a dynamic average of the points, and that has significantly reduced the noise that we were reading
and the issues I was having with the lines in the plots. The graph for the CSD is still putting up a fight though, and amassing many lines that do not
appear when just scatter plotted. I plan to fix that tomorrow, alongside inserting my own generated signal into the data. I have plotted the coherence |
Mon Jul 31 12:39:01 2023, Shane, Update, Electronics, LED cable assemblies installed
|
Today I put together the two LED cable assemblies for the CyMAC and mounted them in the anti-aliasing and anti-imaging chassis. |
Fri Jul 28 18:03:07 2023, Pamella, Update, FLIR, Final plot - FLIR
|
[Pamella]
I was able to plot the final result with the data to the heater. I attached below the "3Combined_HighTemp_Gaussian_Plot." in
this plot we can see better behavior on the Gaussian compared to the plot in ELOG 169, I was using the same data but with a different approach. On the
ELOG 169, we have the center point isolated data and this new plot is the temperature more than 70 C isolated because we have a very good heater temperature |
Fri Jul 28 17:45:45 2023, Celeste, Update, TCS, Graphical Updates to HOM RH Modification, Friday 7/28
|
Updated 1/8th Heater simulation modification graphs. Slides 7, 10, 16-19 are new additions. |
Fri Jul 28 13:46:17 2023, Aiden, Update, VAC, Vacuum Chamber Baking Update
|
Took some more data to look at the HC count. Initial data was from leaving the Argon leak closed and then left it open for 15 minutes and then took
data for the open scenario. Attached are the graphs for these where attachment 1 is the closed scenario and attachment 2 is the open scenario.
From
these graphs it looks like the signal-noise ratio of our calibration line is poor with the ratio between these two being 1.3. This means that the calibrated |
Fri Jul 28 13:39:39 2023, shane, Update, Cleanroom, full 5 zone cleanroom particle count
|
Here's the 5 zone cleanroom measurement from today. |
Fri Jul 28 13:07:39 2023, Shane, Aiden , Update, Cleanroom, cleanroom cleaning and particle count 6x
|
[Aiden, Shane]
cleaning cleanroom and particle count
11:08 am: started particle count
zone 3: 0.3 u: 4198 0.5 u: 1080 1.0 u: 581
zone
4: 0.3 u: 12470.5 u: 6231.0 u: 415
11:24 am: break for removal of vac chamber insulation (pictures |
Thu Jul 27 14:46:55 2023, Shane, Jon, Update, Electronics, AA chassis DC on/off switch assembled
|
Made the first DC on/off switch assembly today and installed in anti-aliasing chassis. Second switch assembly to be completed later. |
Thu Jul 27 14:11:42 2023, Sophia, Update, Scripts/Programs, Update on Laser Noise Data Collection and Analysis: Dynamic CSD and PSD Plots
|
Here's a screen recording of the dynamic raw data and PSD/CSD plots as they are now. Will begin working on implementing a code to generate the statistical
estimator for the CSD uncertainty now. (Will talk to Tyler more about whether I can get the lines to happen or not) |
Thu Jul 27 11:28:36 2023, Sophia , Update, Scripts/Programs, Update on Laser Noise Data Collection and Analysis: Dynamic CSD and PSD Plots
|
This week I have successfully been able to implement our dynamic CSD and PSD plotting code, but along the way I encountered a few challenges which I will
outline in this elog post.
Challenges:
1. Once I was able to plot the data through time, I produced a graph of the raw data (shown below in the top
to images) which showed pulsed data instead of a continuous stream. On Tuesday (26th of July) Tyler and I fixed this issue, realizing that calling the |
Thu Jul 27 10:18:43 2023, Celeste, Update, TCS, Graphical Updates to HOM RH Modification
|
Attached are updated graphs of the irradiance distribution from the 1/8th ring heater units (extruded and reduced in length). |
Tue Jul 25 15:35:14 2023, Shane, Update, Electronics, More chassis moved
|
Finished basic assembly of binary input and output chassis today, and moved one to top shelf of work bench. The other is in corner of work bench (image
attached). They are delicate, so please do not move them or place anything on top of them. |
Mon Jul 24 16:19:29 2023, Shane, Jon, Update, Electronics, Chassis semi-assembled and moved
|
Began assembly on AA and AI chassis today, moved them both to top work bench shelf (image attached). They are delicate so please do not disturb them or
put anything on top of them. |
Mon Jul 24 14:55:53 2023, Jon, Update, VAC, Removed extension power cable
|
I removed the extension cable that was powering the leftmost heater controller, since there is no bake currently happening. It is currently powering the
LED over the electronics bench, and can be removed if needed. I will be ordering more extension cords to permanentize our setups. |
Thu Jul 20 21:00:23 2023, Pamella, Update, FLIR, Data plot FLIR and updates about the black body
|
[Pamella]
Today I got more data to plot the Gaussian. So I took more snaps in each position for the six different spots than we be using to have
a better calibration of the FLIR collected data. I attached the new plot below. Also, I did the same plot for each region as on the Elog 167 but I have
more than 20 pics because I was using a big number of data so I just attached one example below.To access the Elog, click |
Thu Jul 20 18:03:19 2023, Aiden, Update, VAC, Vacuum Chamber Baking Update
|
Took another set of RGA data after the second bake has cooled down to 27 degC.
Just by visual comparison to the other graphs, the HC levels
of the chamber has gone down further. I will soon overlay the data for an easier comparison.
I also reinstalled the full range gauge above
the RGA line. It is still adjusting itself downwards so I will have to check again to get an accurate measurement of the pressure.
|
Wed Jul 19 19:10:31 2023, Pamella, Update, FLIR, Data plot FLIR and updates. 8x
|
[Pamella]
Today I was able to plot a graph for the isolation point on the center of the heater. I got data from six different positions on the
screen (I shifted the all coordinates). I extracted the data for the center point and plot the Gaussian with this extracted data for temperature. I attached
the all plots below
Also I took a snap using the black wall and with the heater at 120.1 C (0.30 A) try to have less noise but
we can see |
Wed Jul 19 14:39:19 2023, Pamella, Shane, Aiden, Update, Cleanroom, cleaning and particle count
|
[Pamella, Shane, Aiden]
cleaning cleanroom and particle count
1:10 pm: started particle count
Zone 3: 0.3 u: 2535 0.5 u: 2071.0 u: 41
Zone 4:
0.3 u: 7890.5 u: 411.0 u: 0
1:30 pm: began surface check and wipedown
1:41 pm: started vacuuming |
Sat Jul 8 14:26:17 2023, Pamella, Update, FLIR, Data with the new configuration without the mask and reflector. 6x
|
[Pamella]
I started collecting data by moving the camera FLIR and covering all six positions on the screen (2x3). I was looking and taking snaps for more
than one hour and a half. I'll repeat this one more time to make sure we have enough data to do analysis.
I attached snap data below. This images is
processed on python code. |
Tue Jul 18 16:35:06 2023, Pamella, Update, FLIR, Plot-Data with the new configuration without the mask and reflector.
|
[Pamella]
I was able to plot the first graph for a result between the six different positions on the screen, for now we can see the behavior
of the heater temperature in a Gaussian graph with combination data between the six files.
To do: Tyler gave me some ideas today to improve
the plot. So I'm going to change the code to have insulation on the values for just the heater ("insulation") and I'm going to plot after this insulation |
Mon Jul 17 11:46:24 2023, Pamella, Update, FLIR, Thermocouple plot.
|
[Pamella]
I collected data to plot a calibration with the heater. I took measurements with current and temperature (the thermocouple - thermometer)
to compare with the FLIR measurements.
I made a plot with this data and we can see how temperature vs current behaves.
Note: This data
I measured manually.
|
Tue Jul 18 16:12:27 2023, Pamella, Update, FLIR, Thermocouple plot.
|
I noticed that these measurements have some issues with the weather on different days. We can see in the photo attached below how different the
temperatures are on different days, I took the data with the same procedure every day, but we can see the differences between them.
To Do: I
will do a new data collection using FLIR and thermocouple at the same time to plot comparison between both.
|
Tue Jul 18 16:04:26 2023, Pamella, Update, FLIR, Setup FLIR with black wall (black body)
|
[Pamella]
Today I tried get data the heater with the black screen but doesn't looks possible have just one "energy" point straight to FLIR camera.
Tyler and I tried different current and temperatures but keep very bad data. I attached a snap below.
I attached a photo about the new setup
below. The FLIR is in the most close point possible/safety with the heater. The heater is very close to the black wall but is not touch the screen so is |
Tue Jul 18 14:13:46 2023, Sophia , Update, Scripts/Programs, Update on Laser Noise Data Collection and Analysis 6x
|
We [Sophia and Tyler] have found a code which will partition our data and generate PSD's and CSD's automatically. We are now in the stage of writing this
into a dynamic code, which so far has been fast-paced because of the framework we have built for it over the past few weeks.
Something to note is that
we have found, especially over long periods of time, the laser goes through periods of extreme noise and the signals often cross from where we set them |
Mon Jul 17 14:01:41 2023, Aiden, Update, VAC, VAC System Heating Update
|
The insulation on the lid of the vacuum chamber has some discoloration and it may be wise to place a sensor closer to this spot in future bakes.
|
Mon Jul 17 13:50:41 2023, Aiden, Update, VAC, VAC System Heating Update
|
Started to cool down the chamber today. Final temperature readings of the chamber were 146C and 91C for the body and cross respectively.
|
Sun Jul 16 15:21:56 2023, Pamella, Update, General, General update about some problems in the lab.
|
[Pamella]
General information about the lab facility.
Changed sticky floor mats, because close to entrance the cleanroom,
both sticky floor had a many died ants on top.
The light on top of the internet cable bridge is burned out.. I just saw this today but I am
not sure if was like this before.
The ant bait traps seem very efficient and right now only a few ants are running around in the lab, most are |
Fri Jul 14 16:49:42 2023, Pamella, Update, FLIR, New bridge and calibration data
|
[Pamella]
Aiden 3D printed a new bridge for the heater and I installed the new bridge yesterday.
I started collecting data to plot
a calibration with the heater. I'm doing measurements with current and the thermocouple (thermometer) to compare with FLIR measurements and have a good
calibration. |
Fri Jul 14 14:37:25 2023, Aiden, Update, VAC, VAC System Heating Update
|
Checked on the vacuum system and it looks like it will either need to be increased in temperature or baked for a longer time. The main body is at 146C
while the cross is at 91C.
|
Thu Jul 13 15:31:21 2023, Jon, Update, General, Ant traps placed around lab
|
In response to reports that ants have been observed in the lab, I placed five ant bait traps around the room today. Each is sitting on the floor on top
of a piece of aluminum foil, in areas unlikely to be inadvertently stepped on. They contain liquid which will spill
out if picked up, so please take care not to disturb them. |
Thu Jul 13 16:59:03 2023, Jon, Update, General, Ant traps placed around lab
|
Update: After seeing the strong response to the first set, I redistributed them to the hottest spots and added one more trap.
Quote:
In response to reports that ants have been observed in the lab, |
Thu Jul 13 14:56:43 2023, Aiden, Update, VAC, VAC System Heating Update
|
Checked on the vacuum system today to change the PID controls back to their default values in order to try and get the temperature of the cross in
front of the turbo pump higher. Currently it is sitting at 90 degC before changing the controls. While the main body is at 146 degC.
Will update
again tomorrow on new equilibrium with the default PID settings.
|
Mon Jul 10 13:23:23 2023, Aiden, Update, VAC, VAC System Heating Update
|
Checked on the system today.
The flange on the turbo pump has reached an equilibrium temperature of 87 degC when set at 150 degC. While
the main body of the chamber has reached an equilibrium temperature of 142 degC.
|
Fri Jul 7 15:11:39 2023, Aiden, Update, VAC, VAC System Heating Update
|
The temperature of the flange connecting to the turbo pump after reaching equilibrium is 74 degC. This means that it is safe to proceed with raising
the temperature from 120 degC to 150 degC.
Raised the set temperature of the chamber from 120 degC to 150 degC in 15 deg steps.
|
Thu Jul 6 18:03:19 2023, Pamella, Update, FLIR, FLIR project - New configuration
|
[Pamella]
Cao suggested using the project without the reflector and mask because in this case we probably got good images around the screen. So I started
this yesterday and today I started to get some data to see the stabilization position and check how the parameters fluctuated. I was looking and taking
snaps for an hour and a half. I'll repeat this one more time to make sure we have enough data to do analysis.
To do: The next step is to start |
Thu Jul 6 16:16:03 2023, Aiden, Summary, VAC, Vacuum Chamber Baking Update
|
Pressure Measured Before Removing Gauge 2.31 E-7 Torr.
Went in and turned on the heating tape in increments of 30 degC until 120 degC was
reached. I will let it equilibrate over night and then asses whether or not the chamber can be raised to 150 degC without having the flange to the turbo
pump reach over 120 degC as it is not recommended for that flange to be any hotter.
If it can safely be raised to 150 degC, then only 2 days |
Thu Jul 6 13:34:48 2023, Pamella, Shane, Julian, Aiden, Update, Cleanroom, cleaning and particle count
|
[Pamella, Julian, Aiden, and Shane]
cleaning cleanroom and particle count
12:00 pm: started particle count
Zone 3: 0.3 u: 28260.5 u: 4571.0 u: 166
Zone 4: 0.3
u: 4570.5 u: 831.0 u: 41
12:17 pm: began surface check and wipedown. NOTE: found |
Wed Jul 5 16:02:12 2023, Aiden, Update, Clean & Bake, Clean and Bake batch 14 Bagging
|
Bagged and Tagged the 2.75" copper gaskets from Batch 14 and placed them into the clean room on the work bench. |
Wed Jul 5 15:46:47 2023, Aiden, Cao, Infrastructure, VAC, Vacuum Chamber Baking Update
|
Cao and Aiden put the RGA back on to the chamber and measured the outgassing rate after the chamber has cooled down from its first bake. The figure
attached shows the RGA measurements with the Argon leak open.
Also put the Full Range Gauge #2 [RGA line] back onto the system to measure the pressure and got a reading of 2.78 E-7 Torr. We believe it |
Tue Jul 4 15:35:38 2023, Pamella, Update, FLIR, FLIR - reflexion problem
|
[Pamella]
I was testing all the positions we need to cover when moving the FLIR camera or the reflector. I tried to find out more about the problem so
I tested the position without the mask, just with the old bridge and I got the same problems, in the middle of the screen we have a very good image but
if we move we have the visualization problem and we don't see the reflection very well (intensity, emissivity) in FLIR.
For this test I used very low |
Mon Jul 3 18:38:13 2023, Pamella, Update, FLIR, FLIR project
|
[Pamella]
I was able to work on the python code to do analysis on the FLIR-Reflector data.
I could plot images of total area (Tyler
help me on that) with csv file and also could have isolation area for triangles. I have attached examples below. Just for now the images are of different
data, so there are some differences in the shapes.
I'm working on getting a complete analysis code to work with the different positions of the |
Mon Jul 3 16:26:21 2023, Cao, Infrastructure, DAQ, Access and control Red Pitaya remotely and run it on local machine
|
[Cao]
To access and control the Red Pitaya using Python locally on a machine within the local network, one should follow these steps:
Start the SCPI server. This is achieved by first log onto the Red Piatay page
rp-xxxxxx.local/
Go to Development >> SCPI server and turn the server on. (Note : The server is currently running)
|
Mon Jul 3 14:32:24 2023, Cao, Infrastructure, VAC, Cooling down vacuum chamber
|
[Cao]
After leaving the the chamber to bake at 120 deg C from Thursday 3:41 pm. Today I started to cool the chamber down to room temperature at
11:30 am (total bake duration: 91 hours 49 minutes). Ideally, this process should be ramped down slowly, approx. 6 degree per hour. However we had no ramping
function with out controller. The only method to tune this cool/ heat rate is to tune the PID parameters, which are:
Pb : Proportional |
Fri Jun 30 16:43:14 2023, Pamella, Update, FLIR, Updates: Small moving the FLIR camera
|
[Pamella]
Today, I was able to make some adjustments to the FLIR camera angle, suggested by Dr. Richardson, and we got small possible movements
keeping the same pattern in the shapes of the triangles. I have attached photos below. I was able to move left and right as well as up and down and it
worked in four points that I marked on the table.
The only problem is that it only worked on a part of the screen, if I try to place it farther |
Fri Jun 30 15:57:28 2023, Pamella, Update, FLIR, Data and python code update
|
[Pamella]
Updates: Problems with the emission intensity and python code.
Yesterday I was working on get data from FLIR
reflector but unfortunately we got some problems:
I realized than if I move the reflector a to left or right the screen
doesn't get data very well(I attached a photo below). This is a problem because our idea is have the same type of emission every part on screen. Tyler |
Thu Jun 29 18:27:26 2023, Jon, Cao, Infrastructure, VAC, Vacuum bake attempt 3: success!
|
[Jon, Cao]
Summary : We resolved problems with heaters tripping power and were able to proceed with chamber baking
1. Circuit connection adjustment
After yesterday elog 137, today we resolved
most of these issues. After Jon contacted Facilities, the LP3B 6 circuit was reset and the cleanroom filter & light panels resumed to work as normal.
|
Wed Jun 28 15:58:56 2023, Shane, Cao, Infrastructure, VAC, Power trip problem remains, source of smoke is insulation
|
[Shane, Cao]
With the new change in wiring configuration described in elog 136, we tried
to power up the heaters for baking the vacuum chamber again.
Given that we were worried about the turbo pump overheats, we set the setpoints of of bother high temperature controller and PID controller to |
Wed Jun 21 20:25:05 2023, Cao, Infrastructure, VAC, Vacuum chamber bake attempt 1 6x
|
TL;DR:
We are not yet able to bake the chamber at 150 deg C due to some current limit, most likely caused power supply switching off. Also,
smoke was observed at some insulation points, mainly in the small arm sections, This is likely because the insulation does not fit well and the velcro
came into direct contact with heat tape. Some Velcro (made from Nylon/ Polyester) has lower melting temperature point (in 90-120 deg C range)
Full |
Tue Jun 27 21:47:56 2023, Jon, Infrastructure, VAC, Vacuum chamber bake attempt 1
|
The electrical overload problem encountered in ELOG 130 has been resolved. The two heater controllers,
which draw up to 14.1 A each, overloaded the UPS and tripped one of its circuit breakers, shutting off power to both power strips mounted above the optical
table. |
Tue Jun 27 15:18:26 2023, Pamella, Update, FLIR, New data collection
|
[Pamella]
Yesterday, I did a new data collection. I could get a better data in this time and I realized than I need use some
angle on the reflector for got a better shot. I need do that because the FLIR camera just is able to get the triangle shape for complete if I keep exactly
in same line for center point on the camera but for the data now I need move the refletor to go up and go down. So wasn't working very well if I keep the |
Tue Jun 27 14:04:42 2023, Sophia A. , Update, Measuring Noise in Interferometer, Interferometer set up and connection to red pitaya
|
Today we (Sophia and Tyler) constructed the set-up for the electrical noise calculation that I will be conducting this summer. I have included images of
the setup below. Our system is effectively a green laser, that feeds into a type of polarizer, then into a beam splitter which sends the laser light down
two arms into detectors. We started by connecting the detectors to an oscilloscope to determine whether the signal will exceed 1V, as the red pitaya (our |
Tue Jun 27 12:09:37 2023, Shane, Update, Cleanroom, cleanroom 5 zone particle count measurement
|
Attached is 5 zone measurement for cleanroom particulate count. Zone 3 (in front of vacuum chamber) higher than usual, likely due to recent vac work. Slightly
above ISO class 5 standard in 1.0 micron range, measuring 997 particles/cubic meter while ISO standard is 832 particles/cubic meter in this range.
Zero
count test on particle counter performed prior to today's measurement. |
Fri Jun 23 15:47:06 2023, Pamella, Update, FLIR, Collecting data - Moving horizontal and vertical on screen. 6x
|
[Pamella]
02:09 pm: Turned on the device (current on)
02:42 pm: Started taking snap on position one (Reference point: 0,-0.062).
Parameters:0.10A,1.5V,41.5C
I took multiplier snap on the same position for compare after on data analyzes. I just wanted one/two minute
break between the snaps. I did that same for every position.
02:55 pm: Started taking snap on position two (Reference point:-0.10,-0.062 |
Thu Jun 22 13:58:00 2023, Pamella, Julian and Shane, Update, Cleanroom, Cleaning and Particle Count
|
[Pamella, Shane, and Julian]
cleaning cleanroom and particle count
12:00 pm: started particle
count
Zone 3
0.3u: 3533
0.5u: 540
1.0u: 166
Zone 4
0.3u: 290
0.5u:
124
1.0u: 41
12:31 pm: Started checking the surface inside the cleanroom and began surface wipedown
12:50 |
Tue Jun 20 22:14:24 2023, Pamella, Cao, Infrastructure, VAC, Short term testing of vacuum heater controller units
|
[Pamella, Cao]
Fuse replacement
Replace blown 10A fuse in ucontroller outside cleanroom
Replace 10 A fuse in
main power connection slot of the controller unit inside cleanroom
Pamella wiped down unit outside cleanroom.
Controller units
turned on and temperature setpoint set to be 80 deg C
Temperature settle in approx. 15 minutes(as recorded by the RTD). No problems with |
Tue Jun 20 17:28:23 2023, Pamella, Update, Electronics, Heater system parts - Wiped
|
[Pamella]
Heating system
Wiping the heater system parts.
04:37 pm: Started wiping the electronic device
part for the heater system (HL101 Series Digital Benchtop temperature limit control).
05:19 pm: Finished wiping the parts to the heater
system (HL101 Series Digital Benchtop temperature limit control). I wiped the HL101 Series Digital Benchtop temperature limit control and I didn't bagged |
Mon Jun 19 11:20:57 2023, Pamella, Update, FLIR, FLIR - Fixed some problems
|
[Pamella]
08:59 am: Turned on the electronic device (current on) for started taking data.
09:37 am: Tried understanding the
error in the focal point. I realized the pillars was in the wrong place and because of that we got problems to keep the reflector in the correct position
to FLIR focus.
09:58 am: Started checking the temperature and the parameters.Changed the pillars to the original position (0.5645m) just |
Fri Jun 16 17:40:28 2023, Aiden, Update, Clean & Bake, Clean and Bake Batch 14
|
Cleaned and Baked the new and 2.75" copper gaskets for the vacuum system. Cleaned them with liquinox in the ultra sonic washer for 10 minutes. Then dried
them with nitrogen. Then put the copper parts into the oven for the following steps; 1. Ramp to 100 degC in 15 minutes 2. Dwell at 100 degC for 30 minutes
3. Ramp to 175 degC in 30 minutes 4. Dwell at 175 degC for 24 hours 5. Turn off
Also bagged and tagged the parts from Batch 13 and placed them into |
Fri Jun 16 16:17:13 2023, Pamella, Update, FLIR, FLIR - Change the position
|
[Pamella]
Today I change the distance between the FLIR camera and reflector (3D-Mask with mirrors and light). Now the distance is 0.3282 m.
Note: In this distance is possible move up and down the reflector and take data to compare.
The focal point inside the reflector keeping
like little problem, every time I tried adjust this I got some triangles is not with "perfect emission" (looks like different than the others). Also if |
Wed Jun 14 15:35:36 2023, Pamella, Update, VAC, Heating system installation
|
[Pamella and Cao]
Heating system installation - Second day.
Today we kept installing the equipment for the heating system.
First: Started installing the two heating cable around the chamber vacuum, the arms and covered it with aluminum tape.
Second: Started
installing the insulation stuff around the vacuum chamber and around the connections points (the arms) in the vacuum chamber.
Third:Started |
Tue Jun 13 21:33:46 2023, Pamella, Update, General, New cabinet for PPI
|
[Pamella and Dr.Richardson]
Dr. Richardson installed the new cabinet outside the room for the PPI equipments, and then I wiped all surfaces inside
and outside of the new cabinet.
Dr.Richardson and I have finished organizing the PPI within the new cabinet. Also we have new supplies of gloves,
and will likely have more supplies for other PPIs soon. |
Tue Jun 13 21:08:46 2023, Pamella, Infrastructure, VAC, Heater system - Installation
|
[Pamella, Cao and Jon]
Heating system installation
Today we started installing the equipments for the heating system.
First: Started installing the heating cable on the top lid and covered it with aluminum tape.
Second: Started installing the insulation
cover on top of the chamber lid.
Third:Started installing the heating cable from under the vacuum chamber and covered with aluminum tape.
|
Tue Jun 13 13:25:05 2023, Aiden, Summary, Clean & Bake, Clean and Bake Batch 13
|
Cleaned and Baked the new 1.33" and 2.75" blanks for the vacuum system. Cleaned them with liquinox in the ultra sonic washer for 10 minutes. Then dried
them with nitrogen. Then put the two stainless steel parts into the oven for the following steps;
1. Ramp to 100 degC in 15 minutes
2. Dwell at 100 degC
for 30 minutes
3. Ramp to 200 degC in 30 minutes
4. Dwell at 200 degC for 48 hours
5. Turn off |
Tue Jun 13 10:28:50 2023, Pamella, Update, General, Wiped and bagged the heating and cords.
|
[Pamella]
Cleaning the heater system parts.
09:13 am: Started wiping the last parts for the heater system (heating and cords).
10:18 am: Finished wiping the parts to the heater system (heating and cords). I wiped, tagged and bagged the heating and cords.
Note: In some parts looks like the silicone insulation material is having some sort of residue on the wipe so I wiped very careful this part and just for |
Mon Jun 12 18:52:00 2023, Pamella, Update, General, Heater system parts - Wiped and bagged
|
[Pamella]
Cleaning the heater system parts.
04:32 pm: Started wiping the heater system parts.
06:38 pm: Finished wiping the heater
and some parts to the system. I wiped, tagged and bagged the heater system, power cables, adapter cables and power connectors. Also I wiped, bagged and
tagged the aluminum foil tape.
06:43 pm: I putted all bags inside the cleanroom.
To do: I started but I was not able to finished |
Mon Jun 12 12:15:10 2023, Pamella, Update, FLIR, FLIR- Take data in the closest point.
|
[Pamella]
Used the closest point possible for the reflector in front of the FLIR camera.
11:32 am : Turned on the electronic device
(current on) for started taking data.
11:50 am: Started checking the temperature and the parameters.
12:04 pm: Started taking snap
after waited for 30 minutes with the current on. Parameters: Current: 0.13A , Volt: 1.8V and Temperature: 51.4 C.
Note: This snap is in the |
Thu Jun 8 14:51:58 2023, Pamella, Update, FLIR, FLIR- Distance
|
[Pamella, Tyler]
Today we change the distance between the FLIR camera and reflector (3D-Mask with mirrors and light). Now the distance is
0.2032 m.
Note: This distance is just for take a snap most close possible but we need move again for a little far way because in this distance
we can't move up and down the reflector for have data to compare.
|
Tue Jun 6 16:15:09 2023, Peter, Update, VLC Update, Launch Optics for Visible Light Cavity
|
I assembled the first few components of the launch optics for the visible light cavity. Below is an image of the current table configuration, and the image
is how the cavity will be oriented on the table. |
Tue Jun 6 16:04:46 2023, Aiden, Update, General, Water
|
Aiden went and refilled the de-ionized water to continue clean and bake batches. |
Fri Jun 2 14:28:40 2023, Pamella, Update, FLIR, FLIR project - Test without the black wall.
|
[Pamella]
Test without the black wall.
Note: So today i collected data for some positions in axis Y (height) for starting
analyses and compares the triangles shapes. I tried keep the same parameters every time.
First position:
01:20 pm :
Started testing and collection data. Parameters: 0.10 A, 1.6V. Reference position: (0,0.05).
01:30 pm : Started snapping the screen. Parameters: |
Thu Jun 1 14:41:36 2023, Pamella, Update, FLIR, FLIR project - Test without the black wall.
|
[Pamella]
Test without the black wall.
General test:.
11:15 am : Started running the code. Parameters: 0.11 A, 1.9V and
focus distance around 0.55m.
11:28 am : Started snapping the screen. Parameters: 0.12 A, 1.8V and 44.1 C .
First trying:
01:18 pm : Started testing and collection data. Parameters: 0.09 A, 1.4V. Reference position: (0,0).
01:28 pm : Started snapping the screen. |
Wed May 31 16:55:55 2023, Pamella, Update, FLIR, FLIR- Focus distance
|
[Pamella and Tyler]
We changed the FLIR Focus Distance for around 0.55 m.
Note: The old focus distance was 1.3 m.
We
tested this new focus distances and looks good. I attached a snap below.
Parameters: 0.1 A , 1.5 V and 38.4 C.
|
Wed May 31 16:18:41 2023, Aiden, Summary, General, Mock FROSTI
|
Finished assembly on the Mock FROSTI so it is ready for the fit test at LIGO lab. |
Wed May 31 12:16:28 2023, Shane, Update, Cleanroom, cleanroom particle counts (full 5 zone measurement)
|
Attached is the full 5 zone particle measurement for the cleanroom after this week's cleaning, 5/31/23. |
Wed May 31 11:42:16 2023, Pamella, Julian and Shane, Update, General, Cleaning room and particle count
|
[Pamella, Shane and Julian]
Cleaning room and particle count
09:58 am: Started the particle count
Zone
3:
0.3u : 1,995
0.5u : 540
1.0u : 0
Zone 4:
0.3u : 124
0.5u : 0
1.0u : 0
10:25 am: Started checking the surfaces inside the cleanroom.
10:30 |
Tue May 30 14:51:27 2023, Pamella, Update, FLIR, New 3D mask - Bigger triangles shapes.
|
[Pamella]
Change the 3D mask
Started removing the old mask in the reflector.
Started cutting the new aluminum lid for the
new 3D mask and assembling in the 3D mask.
Started doing the new cable connections for the light.
Started testing the resistance
in the new cable connections. The multimeter show us 14.2 Ω.
Started attaching the mask with the light and the thermometer sensor.
|
Wed May 24 14:28:26 2023, Peter, Update, VLC Electronics, Laser intensity/polarization drift measurements
|
I went in and took polarization drift data for 16 hours. The run started at 6:08pm and finished at 9:15am the next day. The four plots below are the same
plots shown for the 2 hour collection and previous trials, except they extend to 16 hours. The only one that is different is the Power vs. Time graph.
This is a graph of the actual incoming power of the laser (as opposed to the signal voltage that the PDA's output into the red pitaya). This was done using |
Wed May 24 14:06:27 2023, Pamella, Update, FLIR, FLIR project - Tests
|
[Pamella]
Initial tests
10:30 am : Started trying take some test with the new position/configuration between the 3D reflector-mask
and the FLIR camera.
10:41 am : Started running the python code and take a snap. Parameters: 0.10 A, 1.4 V.
10:50 am : Started take
the snap.It is possible see the triangles, this is a good thing. Negative thing: The middle/center point for the light maybe would be some problems for |
Tue May 23 16:52:56 2023, Pamella, Update, FLIR, FLIR project - Reinstalling the mask and Reconfiguration FLIR position.
|
[Pamella]
Reinstalling the mask and Reconfiguration FLIR position.
Today i change the aluminum foil inside the 3D mask. After some
tries i was able to have a better shape for the triangles.
I reinstalled the connections (the light with the thermometer point). Also i checked
for the focal point inside the reflector, looks fine.
I did a reconfiguration for the initial tests, without the black wall. I moved the FLIR |
Mon May 22 17:08:50 2023, Pamella, Update, FLIR, FLIR project - Installing the mask.
|
[Pamella]
The new mask for the reflector.
1:40 pm: Started reconfiguration on the FLIR camera project. Changed the
old bridge for the new mask-bridge.
2:00 pm: Started figure out the best way to cutting the aluminum foil with the new mask. Unfortunately,
I had been some problems for cutting the perfect shape triangles with the mask because the size inside the triangle is different (smaller) than cutter/knife, |
Mon May 22 16:43:28 2023, Peter, Update, VLC Electronics, Laser intensity/polarization drift measurements
|
In order to fully analyze the polarization data taken last Thursday, I needed to convert the signal output (which is in volts) to power (units of watts).
I used the power meter to accomplish this. Keeping the exact same configuration of PD's and beam splitting, opened the red pitaya's oscilloscope package.
I then took the power meter, and held it in front of the PD to measure the amount of Watts at each PD. I then wrote down the corresponding voltage being |
Thu May 18 14:07:08 2023, Peter, Update, VLC Update, 532nm Intensity Measurement
|
I figured out a method in which to capture power measurements including the initial seconds in which the beam is first turned on. I first clear and restart
the kernel of the python notebook. Then I run the command to connect the red pitaya oscilloscope package to the input data being taken in both channels.
To my understanding, this allows for data acquisition as the code compiles. I then started looping the 1.074s trigger bunches, and then roughly 2 seconds |
Wed May 17 12:18:08 2023, Pamella, Julian and Shane , Update, General, Cleaning room and particle count
|
[Pamella, Julian and Shane]
Particle count:
10 am: Started particle count
Zone 3 :
0.3u: 1288
0.5u: 332
1.0u: 124
Zone 4 :
0.3u: 498
0.5u: 166
1.0u: 83
10:40 am: Checked the surfaces inside the cleanroom.
10:50 am: Started vacuuming the cleanroom.
11:15 am: Started mopping the cleanroom. |
Tue May 16 11:56:33 2023, Peter, Update, VLC Electronics, 532nm Intensity Measurement
|
With the configuration the exact same as before, I used the Jupyter notebook in the red pitaya's development package to collect data from both input channels.
Last week, I was able to take data, yet only for a very short period of time, and I did not know how to change it. I went online to the red pitaya's user
manual to figure out how to change the sampling period for longer. The link to the page is here: https://redpitaya.readthedocs.io/en/latest/appsFeatures/examples/acqRF-samp-and-dec.html#s-rate-and-dec |
Sun May 14 15:50:48 2023, Cao, Infrastructure, Computers, High resolution display of logrus machine
|
[Cao]
The display resolution of the logrus has been 1064x768 and has been the only option, which is not great. While remote access to logrus using
rdesktop allows rendering a virtual display of user's chosen resolution, it is not fast when using graphic-intensive program. NoMachine allows user to
take over and control the machine remotely and thus appears as the same machine. However, NoMachine cannot render a virtual display like rdesktop. This |
Fri May 12 20:28:34 2023, Aiden, Cao, Physics, VAC, Vacuum chamber Helium leak test
|
[Aiden, Cao]
1. Helium leak test
2:00 pm: Uninstall regulator from nitrogen gas tank and move to helium gas tank. Place helium onto
cart and move to the rear door of the clean tent. With the tank remaining outside, feed hose through the flexible wall to use in clean tent - See attached |
Wed May 10 10:49:34 2023, Aiden, Update, General, RGA Software
|
[Aiden, Cao]
Went over how to use the RGA software, how to change the graph units, scaling and mass detection. Also went over how to remove the RGA from
the vacuum system as well as procedure for turning it on. |
Tue May 9 20:55:12 2023, Jon, Infrastructure, VAC, Calibrated Ar leak rate
|
For future reference, the calibrated Argon source has a leak rate of 7.55E-8 atm cc/s, or equivalently 5.74E-8
torr L/s. This can be used to calibrate RGA scans to units of physical leakage (outgassing) rate. |
Wed May 3 19:03:47 2023, Julian,Pamella and Cao, Physics, VAC, Modify vacuum asssembly and install RGA
|
[Pamella, Julian, Cao]
Today we started re-configuring the vacuum chamber components.
Particle count
10:45 am : Starting
the particle count in the clean room.
11:13 am : Finished the particle count in the clean room.
Zone 3 :
0.3 u: 2535
0.5 u: 1413
1.0 u: 789
Zone 4 :
0.3 u: 457
0.5 |
Tue May 9 15:49:20 2023, Jon, Infrastructure, VAC, Permanent cable routing
|
Today I brought in a fresh supply of zip ties (we now have 1500 in the tool chest) and used them to permanentize the cable routing for the gauges, pumps,
and RGA.
I also brought and installed a 3-foot 15A extension cable for powering the scroll pump. Installing the cable required shutting down the pumps, |
Mon May 8 12:00:03 2023, Pamella, Shane, Julian, Update, General, Cleanroom particle counts and cleaning the cleanroom.
|
[Pamella,Julian, Shane]
Today we cleaned the clean-room (floor, surfaces) and particle count.
10:00 am: Started particle count.
Zone 3:
0.3u: 1330
0.5u: 540
1.0u: 415
Zone 4:
0.3u: 290
0.5u:
83
1.0u: 0
Clean-room:
10:30 am: Started wiping down the surfaces inside the clean-room
10:41 am: |
Thu May 4 14:01:10 2023, Peter, Update, VLC Electronics, 532nm Intensity Measurement
|
I adjusted the rotational mount of the wave plate to see if the power can be 100% coupled into either S or P polarization. The images shown below of the
oscilloscope indicate that this is not possible. The minimum transmitted power we can obtain in either S or P polarization is 75mV. The maximum voltage
we obtain in either S or P polarization is ~ 740mV. This means that at a maximum, we can obtain ~ 90% polarization in either direction, indicating that |
Tue May 2 17:03:14 2023, Jon, Cao, Physics, VAC, First pump-down test of vacuum chamber
|
[Jon, Cao]
1. Re-routing of cables
We re-routed the connections between the turbo pump and its fan to the controller. Instead of going through the side of the server rack, they |
Tue May 2 15:55:33 2023, Peter, Update, VLC Electronics, 532nm Intensity Measurement
|
I changed the 1/2 wave plate from the lens mount to the rotational optic mount. This allowed me to rotate the 1/2 wave plate, which changed the respective
polarization power transmitting through S and P polarization. Initially, more power was coupled into the P polarization. Now, with the 1/2 plate rotated,
both channels are experiencing the same voltage reading. Before feeding the PDA signals into the red pitaya, a 50 ohm terminator had to be placed at the |
Mon May 1 18:56:57 2023, Peter, Update, VLC Electronics, 532nm Intensity Measurement
|
I've configured the two PDA's to the Red Pitaya. I put a 50 ohm resistor connector to each red pitaya input port. This was because the oscilloscope showed
that the voltage reading from the P polarization PDA was almost at 1V, which was the limit of the red pitaya. Once both S and P polarization PDA's were
connected, I opened the red pitaya's oscilloscope. A screenshot of the voltage readings is shared below. Channel 1 (Yellow) is for S polarization. Channel |
Mon May 1 17:10:25 2023, Julian, Cao, Physics, VAC, Installing Pirani gauge and RGA probe onto to vacuum chamber
|
[Julian, Cao]
03:00 pm: Particle count
: Zone 3
0.3 um: 498
0.5 um: 124
1 um: 124
:
Zone 4
0.3 um: 748
0.5 um: 457
1 um: 374
03:32 pm: Installing Pirani |
Thu Apr 27 09:48:34 2023, Aiden, Summary, General, Batch 12 Bagging
|
I took batch 12 out of the oven and put them in a bag and placed the bag inside the clean room in the first large stainless steel container.
I also looked
at the small gauge that we felt like needed to be baked and I can confirm that without further cleaning around the inside of the gauge it should not be
connected to the main vacuum. I have attached a photo of the inside of the gauge. |
Fri Apr 28 19:39:19 2023, Cao, Summary, General, Clean and Bake Leybold TTR 91 Pirani Gauge
|
Quote:
I took batch 12 out of the oven and put
them in a bag and placed the bag inside the clean room in the first large stainless steel container.
I also looked at the small gauge that we felt like |
Fri Apr 28 19:00:13 2023, Cao, Physics, VAC, Tighten CF ports on vacuum chamber
|
[Cao]
After Jon's comment yesterday that some of the connection did not seem to have good metal-metal contact, in particular the gate valve connection,
I went through the ConFlat connections today and retighten them.
I found a lot of the CF connections are not particularly tightened and there were a lot
of range left that can be tightened with the wrench. After re-tightening, the copper gaskets are not visible anymore. For example, see the attached images |
Thu Apr 27 16:23:44 2023, Cao, Pamella and Julian, Physics, VAC, Installing vacuum system (cont.)
|
[Pamella, Cao and Julian, Shane]
Particles account
10:37 am: Starting the particles account
Zone 3:
0.3u: 1662
0.5u: 872
1.0u: 415
Zone 4:
0.3u: 831
0.5u: 124
1.0u: 0
11:14 am: Start removal of calibrated leak to install 45 deg elbow
11:21 am: |
Thu Apr 27 21:43:07 2023, Jon, Physics, VAC, Grounding vacuum system
|
This afternoon I made up a green 10 AWG grounding cable and connected it to the vacuum system.
One end is tightly connected to the bottom flange of the vacuum chamber (photo 1). It is run along and up the table framing to the top of the cleanroom,
where it exits into the overhead cable tray in the same location as the other power cables. It drops down from the top of the server rack all the way to |
Fri Apr 28 18:16:57 2023, Cao, Physics, VAC, Grounding vacuum system
|
Quote:
This afternoon I made up a green 10
AWG grounding cable and connected it to the vacuum system. |
Fri Apr 28 11:21:01 2023, Peter, Update, VLC Update, Laser intensity/polarization drift measurements
|
The Digi-key cables have arrived, and I have began implementing them in the intensity drift measurements.
There was a slight problem initially in connecting
the SMA to BNC cables from the photodiode to the red pitaya, since the red pitaya was way on the other side of the lab. Cao and I connected the red pitaya
to a new ethernet cable that extended far enough for the red pitaya to sit comfortably on the breadboard with the optics.
Right now the PDAs are not |
Wed Apr 26 18:05:41 2023, Pamella, Julian, Shane, Update, Cleanroom, cleanroom particle counts and cleaning log
|
pre-cleaning particle counts:
zone 3
0.3 mu: 2494
0.5 mu: 748
1.0 mu 124
zone 4
0.3 mu: 374
0.5 mu: 41
1.0 mu: 0
3:45 pm: Started wiping
the surfaces(laser table,chamber, computer) inside the cleaning room.
4:05 pm: Finished wiped the surfaces
4:08 pm: Began vacuuming |
Tue Apr 25 11:56:37 2023, Jon, Update, VLC Electronics, Red Pataya has arrived
|
The Red Pataya 125-14 starter kit that we ordered for locking the 532 nm cavity has arrived. I left it laying on the optical table near the laser. |
Mon Apr 24 17:38:45 2023, Aiden, Summary, General, Clean and Bake Batch 12
|
Today I Bagged and tagged the o-rings from batch 11 and placed them inside the clean room. I also cleaned batch 12 parts in liquinox for 10 minutes and
them placed them into the oven where they will undergo the following steps;
1. Ramp to 100 degC in 15 min.
2. Dwell at 100 degC for 30 min.
3. Ramp
to 200 deg C in 30 min.
4. Dwell at 200 deg C for 48 hours.
5. Off |
Fri Apr 21 16:51:26 2023, Pamella, Update, General, Cleaning cables.
|
Cables for the vacuum system.
Today i wiped, bagged and tagged two cables for the vacuum system. I used IPA wipes for cleaning this two split
power cord. I attached a image below.
|
Fri Apr 21 15:21:18 2023, Pamella, Update, FLIR,
|
FLIR project updates
01:50 pm: Starting test position 34 mm distance to black wall.
Parameters : 0.100 A, 1.5 V and
the temperature inside the mirrors 40°C.
2:09 pm : Finished the test and figured out this position it is too far the black wall so now we change
for more close position.
2:17 pm: Starting test in another position: 10 mm distance to the black wall( this measurement |
Wed Apr 12 16:13:19 2023, Cao, Physics, VAC, Vacuum prep and installation
|
Aiden, Pamella, Peter, Shane, Cao
Today we started vacuum chamber assembly work
10:16 am: Particle count measurement of clean
room
10:34 am: Particle counting finished: meets ISO 5 standard
Zone 3 :
0.3 u: 3159
0.5 u: 789
1.0 u: 83
Zone 4 :
0.3 u: 498
0.5 u: 41
1.0 u: 0
|
Fri Apr 21 00:06:43 2023, Jon, Update, VAC, Vacuum prep and installation - parts have arrived
|
The two parts needed to complete the vacuum assembly (ELOG 70) have arrived.
(10) 5/16"-24 x 1 3/4" threaded rods - for attaching the turbo pump reducing nipple to the CF 4.5" gate valve;
(1) 45 degree CF
2.75" elbow for attaching the calibrated Ar/He leak to the chamber.
I left them laying on top of the ultrasonic washer. They both need |
Wed Apr 19 17:39:50 2023, Pamella, Update, FLIR, FLIR project
|
FLIR project updates- Initial tests
10:00: Starting test in position 2 cm to the black wall.
Parameters : 0,305
A, 05,5 V and the temperature inside the mirrors 141,8°C.
10:23 Finished this first tried and take snap. The image is attached below.
The name for the picture for this tried is “AcquisitionImage(Apr-19-2023_10 23)”.
10:37. Starting test in another position |
Mon Apr 17 17:06:49 2023, Aiden, Summary, General, Clean and Bake batch 11
|
Cleaned the Viton O-Ring for the main chamber in Liquinox for 10 minutes. Then put it in the oven to back for;
1. Ramp to 100 degC in 15 min.
2. Dwell
at 100 degC for 30 min.
3. Ramp to 180 degC in 30 min.
4. Dwell at 180 degC for 24 hours.
5. Off
Note: There were three viton -rings in the bag sent
to us. I cleaned and baked 2 of them and left the third in the bag. |
Wed Apr 12 16:17:50 2023, shane, Update, General, Particle Counter moved
|
With the added height of the new docking station, the particle counter no longer fits under the Windows monitor in the electronics rack and has been moved
to the desk in the corner of the lab. |
Wed Apr 12 10:53:02 2023, Aiden, Summary, General, Valve Cleaning
|
Bagged and Tagged the parts from batch 10 and placed them inside the clean room.
Then cleaned the last gate valve in liquinox for 20 minutes (10 minutes
each side). Then dried the valve, bagged, tagged, and placed it inside the clean room. |
Tue Apr 11 17:56:15 2023, Pamella, Update, General, Lab cleaning
|
Today Pamella and Julian finished cleaning of the cleanroom, starting with the HEPA vacuuming, mopping and clearing all floor with IPA wipes. Also we wiped
down some surfaces of the blue table, computer table and the top of chamber. |
Tue Apr 11 13:15:40 2023, Cao, Infrastructure, Clean & Bake, Nitrogen gas tank replaced
|
The nitrogen gas tank has been replaced with a new unit. The new tank is ultra pure nitrogen (>99.9% nitrogen).
The new tank has been placed and secured
to the rack where the old one is; cap is removed and regulator is reinstalled onto the new tank. |
Fri Apr 7 09:48:09 2023, Pamella, Update, General, Clean the system parts 7x
|
Pamella and Julian wiped and tag system parts for the vacuum machine. We used isopropyl and vectra wipes in the most import pieces:
Inverted magnetron
pirani gauge and the air cooling kit 81. The other parts we uses the IPA wipe for cleaning.
So for now we finished with ever system parts which was in
the gabinetes.
I put photos below. The photos is for all part we cleaning, tag and which puted inside the cleaning room. |
Thu Apr 6 10:20:43 2023, Peter, Update, VLC Update, Laser intensity/polarization drift measurements
|
More optical components were added to the optical set up for laser intensity / polarization drift measurements. Both lenses and both PDs were added to the
configuration, as seen in the image below. The beam is already well aligned into the center of both of PDs, and focused nicely by the lens.
Both PD's
take BNC connecting cables, and the Red Pitaya takes SMA connecting cables. Since we are currently without a BNC to SMA cable, and we do not want to cut, |
Tue Apr 4 16:52:08 2023, Jon, Update, Cleanroom, Particle counter docking station
|
Due to the problems we have encountered trying to serially communicate directly with the Met One DR-528 particle counter, I went ahead and ordered the add-on
communications/charging dock. The dock "ethernetizes" the serial communications by wrapping them in TCP packets and transmitting them over the lab network.
This will allow our Python code to communicate using the standard Internet sockets package, rather than PySerial, PyNut, etc.
the docking station arrived |
Tue Apr 4 16:43:53 2023, Jon, Update, VLC Electronics, Additional Thorlabs PDA10A2
|
I ordered a second PDA10A2 and mounting post + spacer (which puts the aperture at the VLC's standard 3" beam height). These arrived today and I delivered
them to the lab. They are sitting on the VLC table near the laser. |
Tue Apr 4 09:53:37 2023, Peter, Update, VLC Update, Laser intensity/polarization drift measurements
|
The set up for the next round of beam characterization measurements has begun. The beam is initially passing through a half waveplate, is split at a polarizing
beam splitter, and then stirring mirrors are used to properly aim the beam into photodiodes (not yet installed). This is the current configuration of the
set up. |
Tue Apr 4 09:39:58 2023, Peter, Update, VLC Electronics, 532 M2 Measurements
|
Final M squared measurements were taken Wednesday, 3/29/23 by Peter and Ryan Hinosawa. 5 separate sets of data were taken, and upon discussion, we declared
the plots shown below in attachment 1 and 2 as the final plots of our M squared measurements.
The optical design of the M squared measurement process
is given in attachment 3. The laser and three lenses shown below are mounted on the optical table. The track is placed behind the third lens, and the camera |
Mon Apr 3 17:04:05 2023, Aiden, Summary, General, IDP Scroll Pump Assembly
|
Aiden installed the isolation valve and the exhaust silencer kits on the IDP-3 Scroll pump. The entire assembly still needs to be wiped down but overall
no residue came off when putting on the kits. |
Fri Mar 31 14:23:13 2023, Pamella, Update, General, Clean and bake batch 11
|
Today I bagged and tagged batch 11. I wiped the some tools: Centering ring alum( 2 pieces), reversible ratcheting, gasket removal (CF). After wiped that
I bagged and tagged this parts and put inside the cleanroom.
Also I wiped one power cable (3 meters), bagged and tagged that and inside the cleanroom.
I put photo below. |
Wed Mar 29 16:00:36 2023, Pamella, Update, Cameras, FLIR project
|
Today Pamella and Tyler started work in the updates for the FLIR project.
We trie for the first time cover the mirrors with aluminum foil and run the
code with this.
We work in figured out how the python codes works with real datas.
To do:
Understand how get the real datas and how to compere that
with the old datas.
Starting test with the FLIR and mirrors with aluminum foil in with the power on.
Testing the FLIR camera more times with the mirrors |
Fri Mar 24 13:36:17 2023, Pamella, Update, General, Clean and Bake batch 10
|
Today I bagged and tagged batch 10.
I wiped the RGA vacuum component for around 25 minutes after that I bagged and tagged this part and put inside the
cleanroom. The RGA vacuum component have a big size and because off that i used the big bag.
I wiped one power cable (2 meters), bagged and tagged that
and inside the cleanroom.
For the parts in the oven, a bunch of screws, I bagged and tagged the screws and put inside the cleanroom.
I put photos below |
Wed Mar 1 21:50:46 2023, Jon, Infrastructure, Computers, Workstation 2 (ws2) mounted on cleanroom cart
|
The Linux workstation (ws2) that used to sit on the blue workbench (now inside the cleanroom) has been mounted on a mobile cart, as pictured below. This
is intended to be a clean cart that will be housed inside the cleanroom.
The cart is currently dirty and will need to be throughly wiped down (along with the computer monitor and peripherals) prior to being moved into |
Fri Mar 24 07:14:38 2023, Jon, Infrastructure, Computers, Workstation 2 (ws2) mounted on cleanroom cart
|
The ws2 cart has been thoroughly wiped down with IPA wipes and moved inside the cleanroom. I have reconnected it to power and Ethernet (cables bundled and
ran to the server rack just outside the cleanroom). It is ready for use.
Quote:
|
Thu Mar 23 18:40:08 2023, Julian, Update, General, Cleanroom Update
|
Today Pamella and I came in to Hepa vacuum and mop the floor of the cleanroom for general maintenance. |
Wed Mar 22 15:25:00 2023, Shane, Update, General, Clean room recertification particle counts
|
Attached are the five zone particle measurements for the clean room now that the fan speeds have been set to MEDIUM. 2 min sample time, 3 samples per zone.
The occupied clean room measurements were unusual in that they generally got larger towards minute 6 instead of settling and going to zero, and for this
reason didn't stay beneath the class 5 requirement at the end of the samples. The unoccupied counts look more similar to what was expected, and generally |
Wed Mar 22 12:16:20 2023, Jon, Infrastructure, Cleanroom, Experimenting with HEPA fan speeds
|
Jon, Cao
In effort to try to reduce the noise level inside the cleanroom, we have dialed all four HEPA fan-filter units (FFUs) down from HIGH to MEDIUM
speed. These dials can only be accessed from inside the cleanroom, by bringing in the large ladder and opening adjacent ceiling tiles. |
Fri Mar 17 19:46:39 2023, Aiden, Summary, General, Clean and Bake batch 9
|
Bagged and Tagged the reflector arms and bases and placed them inside the clean room. Total of 2 bags used. Cleaned and Baked parts in batch 9 on the spread
sheet and used the following procedure;
1. Ramp to 100 degC in 15 min.
2. Dwell at 100 degC for 30 min.
3. Ramp to 200 degC in 30 min.
4. Dwell at
200 degC for 48 hours.
5. OFF
Also soaked the 2.75" CF gate valve in acetone to try and clean the open threads around the part. Then cleaned it in |
Tue Mar 14 18:21:41 2023, Aiden, Summary, General, Clean and Bake batch 8
|
Starting off Peter and I refilled the deionized water barrel.
Then Aiden Cleaned and Bake the FROSTI arms and bases in liquinox for 5 minutes. Then placed
them in the oven where they will undergo the following steps;
1. Ramp to 100 degC in 15 min.
2. Dwell at 100 degC for 30 min.
3. Ramp to 120 degC in
30 min.
4. Dwell at 120 degC for 48 hours.
5. OFF
Also cleaned the 2.75 MDC Gate valve for 20 minutes (10 minutes each side) in liquinox. It looks |
Fri Mar 10 12:08:09 2023, Peter, Update, VLC Electronics, 532 M2 Measurements
|
Took more M2 laser data today. The configuration is the same as before except now the beam camera is the only component moving. Pictures can be seen below.
The beam shape in x and y is very consistent with low error. However, the M2 value is still a bit high. |
Thu Mar 9 13:51:42 2023, Shane, Update, General, Clean room counts 3/9/23
|
Here's the clean room counts from this morning. Also attached is rough diagram of where the five zones are in the clean room. Counts taken with 2 minute
sample time, three samples in each zone. |
Thu Mar 9 12:03:59 2023, Peter, Update, VLC Electronics, 532 M2 Measurements
|
Took more M2 Data today. Picture of the optical set up is shown below. lens1 f = 100mm, lens2 f = 50mm, lens3 f = 150mm. There was a nice converging/diverging
beam profile, and the beam waist was able to be read by the camera. I took as much data as I could before clipping loss. The M2 value is quite high. |
Wed Mar 8 19:29:00 2023, Aiden, Summary, General, Clean and Bake batch 7
|
Today gave another cleaning to the MDC gate valve. It is still very dirty an will need more cleaning. I also cleaned the other 3 valves and the argon leak.
These are also in bags inside the clean room. I cleaned them by hand with IPA wipes and had to specifically give the MDC up to air valve a harder clean
with acetone as it was not getting clean with the IPA. This valve still has a ring around the face as shown in the first image. Be very cautious when moving |
Wed Mar 8 18:35:52 2023, Pamella, Update, , Lab cleaning
|
Today Pamella finished cleaning of the cleanroom, starting with the HEPA vacuuming, mopping and clearing all floor with IPA wipes.
Also Pamella and Julian
finished cleaning of lab floor, starting with the HEPA vacuuming and mopping.
Shane and Pamella wiped down every surfaces of the laser table, computer
table and the table with the vacuum pieces inside the cleanroom.
Shane, Peter, Tayler, Pamella and Julian then wiped down every surface of the laser table |
Mon Mar 6 18:48:43 2023, Pamella, Update, General, Cleanroom update
|
Today Pamella and Julian finished cleaning of the new lab cabinets. Also we wiped the computer and put inside the cleanroom so now the computer is not
move out side anymore.
We saw some dirty parts in the cleanroom floor again and is possible for the next step we should be clearing the floor one more
time.
Possible is necessary order more IPA wipes for keep cleaning in nexts weeks.
A photos of the cabinets and the computer are attached below. |
Mon Mar 6 15:32:58 2023, Jon, Infrastructure, General, Cabinet installation completed
|
Jon, Cao, Peter
This morning Facilities delivered and installed two new cabinets with sliding glass doors.
The smaller of the two (36" W x 13" D x 84" H) has been installed in the Clean & Bake area adjacent the flow bench. The larger one (48" x 16" |
Sat Mar 4 00:34:46 2023, Julian, Update, General, Cleanroom Update
|
Today I was able to finish cleaning the frame of the laser table, and for good measure I wiped down the tabletop and exterior of the vacuum chamber when
I was finished. I was also able to go through and wipe down the bags containing the vacuum parts as well as the tabletop of the workbench. |
Fri Mar 3 19:13:33 2023, Aiden, Summary, General, Clean and Bake Batch 6
|
Started to clean the dirtiest of the valves. I could not finish but I definitely made good progress on it. The MDC valve is very dirty and there are many
places I could not reach with my fingers. I used Acetone and IPA for this first round of cleaning on it.
I also was going to bag the viton O-Ring from
the previous Batch, however it seems to have broken during the bake and I am leaving it inside the oven for now. |
Thu Mar 2 20:53:56 2023, Julian, Update, General, Cleanroom Update
|
Today Pamella and Julian began the final cleaning of the cleanroom, starting with the HEPA vacuuming and mopping then wiping down every surface of the laser
table. We wiped the main tabletop as well as the legs, but we were unable to completely wipe down the upper frame of the table before we had to leave.
For next steps, Julian will come in on Friday and finish cleaning the frame, then both of us will come in on Monday to finish the final cleaning. |
Wed Mar 1 21:27:20 2023, Jon, Infrastructure, Cleanroom, Over-table shelf height raised
|
Jon, Cao
Today we raised the height of the shelf overhanging the cleanroom laser table by 8 inches. This was done to create more vertical clearance between
the top-loading vacuum chamber and the bottom of the shelf. The added clearance should make both removing the chamber lid and inserting large parts easier. |
Tue Feb 28 19:37:22 2023, Aiden, Summary, General, Clean and Bake batch 5
|
Bagged and Tagged batch 4 parts by placing no more than two part numbers per bag and taped them with kapton tape and labeled them with their name and part
number. Then placed them in the clean room on the work bench. Cleaned batch 5 part (Viton O-Ring) with liquinox and placed the into the oven for 5 steps;
1. Ramp to 100 degC in 15 minutes. 2. Dwell at 100 degC for 30 minutes. 3. Ramp to 180 degC in 30 minutes. 4. Dwell at 180 degC for 48 hours. 5. Turn off |
Tue Feb 28 19:33:51 2023, Peter, Update, , 532 M2 Measurements
|
Y axis of plot in units of micrometers. X axis in units of millimeters. |
Tue Feb 28 19:31:05 2023, Peter, Update, VLC Electronics, 532 M2 Measurements
|
Took M2 measurements today. Configuration: Lens 1 (f = 50mm) at 0mm. Lens 2 (f = 150mm) at 200mm, camera at 350mm. The laser beam was being moved in -z
direction on track (so further away from the first lens). Quick data shown in the sheets plot. Not a real fit. I was trying to see where the beam waist
was if there even was one. Seems that it is much further than we have room for on the track. Will need to come back and take more data.
I suggest maybe |
Tue Feb 28 13:53:17 2023, Pamella, Update, General, Vacuum chamber cleaning
|
Pamella, Dr. Richardson and Dr.Cao finished checking and cleaning the interior of the chamber, chamber lid, and exterior of the chamber with Vectra Alpha
wipes, IPA and in some parts we used acetone . We flip the chamber and put chamber on the table again. A picture of the specific situation is attached
below. The next step from here would be to finish the cleaning the floor .
The black residues on the side of the table probably is some reaction between |
Mon Feb 27 17:09:04 2023, Pamella , Update, General, Vacuum Chamber Cleaning
|
Pamella and Julian finished cleaning the interior of the chamber, chamber lid, and the table. We found some black residue on the side of the table but not
sure what the issue is. A picture of the specific area of the table that is giving off the black residue is attached below. The next step from here would
be to flip the chamber on its side and finish the cleaning the exterior. |
Thu Feb 23 21:12:33 2023, Julian, Update, General, Vacuum Chamber Cleaning
|
Today I was able to come in and wipe down both sides of the vacuum chamber lid using the regular alcohol wipes and also wipes that were left to dry in the
fume hood then saturated with acetone. I managed to get a good amount of the residue off both the inside and outside surfaces of the lid, then did a test
wipe of both sides using acetone-soaked wipes; pictures of the wipes are attached below. Once I finished with the lid, I used another acetone wipe to test |
Thu Feb 23 13:32:55 2023, Shane, Update, General, Clean room floor particle counts
|
Here are the counts from the clean room floor today. The counts should be dated- the ones from today (2/23/23) are the last 8 in the chart. The first set
of 2 measurements from today were under the table by the clean room entrance, the next two were under the table by the vacuum chamber, the next two were
on the floor by the vacuum chamber lid, and the last two were on top of the table for comparison. All measurements were taken using 2 minute sample time. |
Tue Feb 21 17:51:04 2023, Aiden, Summary, General, Clean and Bake batch 4
|
Bagged and Tagged batch 3 parts by placing no more than two part numbers per bag and taped them with kapton tape and labeled them with their name and part
number. Then placed them in the clean room on the work bench.
Cleaned batch 4 parts with liquinox and placed the into the oven for 5 steps;
1. Ramp
to 100 degC in 15 minutes.
2. Dwell at 100 degC for 30 minutes.
3. Ramp to 200 degC in 30 minutes.
4. Dwell at 200 degC for 48 hours.
5. Turn off and |
Fri Feb 17 19:12:39 2023, Aiden, Update, General, Clean and Bake batch 3
|
Bagged and Tagged batch 2 parts by placing no more than two parts per ESD bag then taped them with kapton tape and tagged them with their name and part
number. Than placed them inside the clean room on the work bench. Total of 3 Bags used.
For Batch 3- Cleaned all copper gaskets with liquinox for 10
minutes, dried them off with nitrogen, then placed into oven where the are currently undergoing the following steps;
1. Ramp to 100 deg C in 15 minutes.
2. |
Mon Feb 13 18:57:53 2023, Aiden, Summary, General, Clean and Bake batch 2
|
Cleaned second batch of SS parts with liquinox for 20 min. Then put in oven for 5 steps; 1. Ramp, 100 degC, 15 min 2. Const, 100 degC, 30 min 3. Ramp, 200
degC, 30 min 4. Const, 200 degC, 48 hours 5. Ramp, 25 degC, (off). |
Sat Feb 11 17:09:29 2023, Shane, Update, General, clean room particle counts 2/10/23
|
Took a round of clean room counts after the latest clean of vacuum chamber on Feb 10. Used 60 second sample time, 5 samples for each of the 5 zones. Plots
attached for both occupied clean room (one person inside, attachment 1) and unoccupied clean room (empty attachment 2), as well as the raw data from the
particle counter (attachment 3). |
Sat Feb 11 00:17:27 2023, Julian, Update, General, Vacuum Chamber Cleaning
|
Today I finished wiping down the rest of the vacuum chamber, specifically focusing on the connecting ports and outside surface of the chamber. When I was
finished, I test wiped every surface of the chamber and took pictures confirming the current state of cleanliness; Attachment 1 "Wipes for top and bottom
of chamber's upper lip." Attachment 2 " Top and bottom of chamber's lower lip." Attachment 3 "Inside and Outside main chamber." Attachment 4 "Inside connecting |
Fri Feb 10 16:34:45 2023, Huy Tuong Cao, Infrastructure, Clean & Bake, Nitrogen gas tank ready to use
|
Cao,
Today I fixed the final bit related to the nitrogen gas tank, which is to apply sealing tape to M-NPT connector of the hose to prevent
leakage
(file: AirGunSealed.jpg)
After application of the tape, no audible leak can be heard from connection between the hose and the air gun. |
Fri Feb 10 15:15:30 2023, Aiden, Update, General, Bagging First Batch
|
Aiden Bagged and Tagged the first batch of stainless steel parts shown on the google spread sheet.
1. Removed two parts from the oven.
2. Place them
in the ESD bag.
3. Seal bag with Kapton Tape.
4. Create label including part name and number underneath it.
5. Put label onto the side of the bag where
it is not sealed with tape.
6. Placed bagged items into clean room on work table.
ps. total bags in first batch = 4 |
Tue Feb 7 17:44:17 2023, Jon, Infrastructure, Computers, Workstation 1 (ws1) set up
|
The Linux workstation (ws1) that used to sit on the old workbench has been mounted on the new electronics bench and is now ready for use again. I upgraded
the OS to Debian 11.6 and also upgraded the CDS workstation tools. |
Tue Feb 7 17:27:30 2023, Aiden, Physics, ELOG, Clean and Bake Batch #1
|
Cleaned SS parts with liquinox for 20 min. Then put in oven for 5 steps;
1. Ramp, 100 degC, 15 min
2. Const, 100 degC, 30 min
3. Ramp, 200 degC, 30 min
4.
Const, 200 degC, 48 hours
5. Ramp, 25 degC, (off)
PS. Ultrasonic washer does not have heating feature. |
Mon Feb 6 20:02:32 2023, Julian, Update, General, Cleanroom Update
|
I wiped down the main table (including frame, legs, and transparent shelf) and workbench using alcohol wipes. Once I cleaned all of the surfaces, I used
the Hepa vacuum to pick up any fallen debris. |
Sat Feb 4 17:01:03 2023, Peter, Update, VLC Electronics, Laser Data
|
Peter and Ryan took laser beam data. Configuration: 100mm focal length lens is ~100mm from lens. 150mm focal length lens is ~200mm from first lens. Beam
waist is ~420mm from second lens.
Beam waist is very small still. Had to input large amounts of error in data collection. Took width data successively
at points near waist and at >= Rayleigh range. Plots are shown below.
Key points:
Took a while to figure out optimum configuration for lenses to |
Fri Feb 3 13:04:04 2023, shane, Summary, General, clean room particle counts 1/25/23
|
Clean room count graphs for each zone (as of January 25, 2023) attached |
Fri Jan 27 18:44:31 2023, Julian , Update, General, Vacuum Chanmber Cleaning
|
I used the IPA wipes to wipe down the inside of the chamber the best I could. I cleaned the main chamber but not any of the connecting joints. When I finished
I did a once over with a fresh wipe and found no residue. |
Thu Jan 26 18:58:25 2023, Aiden, Update, General, Oven Heating
|
Aiden cleaned the oven with methanol again and set the oven to 260 degC for 12 hours. |
Mon Jan 23 17:26:15 2023, Peter Carney, Update, General, Oven cleaning
|
Aiden and Cao
Turned on the oven to 120 deg C for 12 hours. After 12 hours, put it at 200 deg C for 48 hours. |
Wed Jan 18 22:06:05 2023, Julian, Update, ELOG, Cleanroom Update
|
I wiped down all the inner walls of the cleanroom using alcohol wipes, as per Cao's instruction. |
Wed Dec 14 18:34:33 2022, Jon, Configuration, Electronics, Adapter for 532 nm laser power supply
|
I installed an EU-to-US plug adapter for the 532nm laser's 9V power supply. I then re-measured the laser's power with the correct supply voltage (previously
we had been using a 6V supply). At 9V, the max power is 0.83 W, so the laser is confirmed to be Class 2 as labeled. |
Wed Dec 14 17:35:41 2022, Jon, Infrastructure, Computers, Windows Laptop
|
I set up the new Windows 10 laptop (pictured below), which arrived yesterday. This laptop is intended to be used for running lightweight Windows-only
programs, such as the Thorlabs beam profiler software or the SRS RGA client. However, none of that software is installed yet.
Configuration details
As usual, the computer is configured with one shared account (username: controls) and the standard password. Note |
Mon Nov 28 18:10:23 2022, shane, Update, ELOG, Particle counts in the clean room
|
Particle count stats for the clean room Nov 28, 2022:
Took 10 sample runs in each of 5 regions in the clean room (5 runs per region with a person inside
the clean room for the measurement, and 5 runs per region without anyone in the clean room for the measurement), for a total of 50 samples taken. Sample
time was 60 seconds. Overall clean room average particle count for the size ranges are as follows:
0.3 micrometers- 3405.76 (room occupied), 974.92 (room |
Mon Oct 3 17:21:39 2022, Cao, Update, TCS, Inspection of macor parts 7x
|
The macor parts arrived and inspected today. These include:
Macor spacer (drawing: LIGO_Redesign_Macor_Spacer_Drawing_v4.pdf
attached below), quantities: 40
No defects, damages observed
Parts are free from grease/ machining fluid
Wall thickness
of 1 mm appear to provide sufficient stiffness to part
Images of parts: Macor_spacer_0.jpg, Macor_spacer_1.jpg
|
Wed Aug 17 16:04:30 2022, Phoebe Zyla, Summary, Lore, Testing the Cartridge Heater and Collecting FLIR Data
|
We have tested the heater to find emissivity, mounted the heater system to the optical table, and have taken irradiance maps of the heater projected
onto the screen.
The heater's emissivity was determined by using a thermocouple in conjunction with the FLIR's temperature calibration. To attach
the thermocouple to the heater initially, I used Kapton tape and ran both the wires of the heater and the thermocouple through the heater bridge. This |
Tue Jul 26 14:10:35 2022, Cassidy, Update, Cameras, Optical Post Replacement and Realignment
|
Today I replaced the 3" optical post that the camera rests on with a 2" optical post in order for the screen to correctly fill out the camera's FOV. The
3" post is now in the glass optics cabinet next to the FLIR camera configuration box, wrapped in the protective materials from the 2" post for safekeeping.
There were no issues with the physical replacement of the post, except that the fork clamp on the post needs to be on one of the perpendicular, |
Fri Jul 22 13:20:28 2022, Phoebe, Update, , Comsol
|
I will be using comsol until 1:30 pm today. I will be updating the model for the heater mount to be thicker in certain areas, so that it can feasibly be
3D printed. Specifically, the radius of the center cartridge mount has been increased to add thickness to the pipe and the arms of the bridge. This will
allow us to print with a much smaller chance for error, as the printer can print objects with a minimum length of 1 mm. |
Mon Jul 11 14:29:45 2022, Jon, Omnistructure, General, HEPA filter installed
|
Today I unpacked and installed the new HEPA filter for the lab. It is an Omni CleanAir OCA1210 capable of 1200 CFM. This flow rate is sufficient to turn
over the air in the room once every 4 minutes, or 14 times per hour. Hopefully this will cut down on our particulate accumulation issues. |
Tue Jun 21 18:31:49 2022, Cassidy and Phoebe, Update, Cameras, IR Absorbing Screen and FLIR Camera Setup
|
Today we set up the IR absorbing screen and the camera on the optical table, as well as tested that the camera was functioning as expected (picking up heat
sources beyond the screen).
Screen Setup
The screen was set up by clamping it between two rectangular posts on each side. First, two posts
were set up with 22 in. between them (thus allowing the screen to span a total distance of up to 24 in. when clamped down). To best stabilize the screen |
Thu Jun 2 21:55:02 2022, Jon, Update, Cameras, FLIR Camera Setup
|
The new FLIR A70 infrared camera has arrived. Tyler and I unpacked it in the lab yesterday. In less than an hour, we succeeded in powering it on and
connecting it to the lab network. We have assigned it the static IP address 192.168.1.6.
Online Configuration Portal
The FLIR camera can be configured, as well as stream live data, through a web browser interface. It can |
Fri Jun 3 13:03:33 2022, Jon, Update, Cameras, FLIR Camera Setup
|
Summary
I have installed the requisite software on chimay for interfacing the FLIR A70 camera in Python. There are two packages required from
FLIR:
Spinnaker SDK, which provides the low-level camera drivers and a C/C++ API.
|
Mon Jun 6 17:11:48 2022, Jon, Update, Cameras, FLIR Camera Setup
|
Today I tested the Spinnaker/PySpin software installations (detailed in ELOG #4) with the FLIR
camera connected to chimay. It works!
Example codes
I was able to run several of the PySpin example codes. In particular, there is one which connects to the camera and streams |
Thu Jun 2 16:14:58 2022, Jon, HowTo, General, Custom conda environment on JupyterHub
|
Cross-linking instructions: How to run a Jupyter notebook in your custom Conda environment |
Sun Apr 10 15:39:49 2022, Rutuja Gurav, HowTo, Computer Scripts/Programs, HowTo: Renew the Let's Encrypt SSL certificate using certbot
|
Port 80 is kept closed by default. This might be causing the certbot auto-renewal cronjob to fail. Therefore we must renew the certificate manually.
Step 1: Open port 80. (This is needed as the certificate renewal process runs some tests which requires client communication over |