 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). |
|
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 |
|
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.
|
|
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.
|
|
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 |
|
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 |
|
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 |
|
Wed Oct 16 14:13:31 2024, Liu, Update, , FROSTI with non uniform absorption scattering sources
|
| Slides |
|
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 |
|
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. |
|
Wed Oct 2 14:49:59 2024, Liu, Update, , FROSTI ETM actuation
|
Proposed FROSTI ETM actuation on the HOM7 resonance.
Animation |
|
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, |
 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.
|
|
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, |
|
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 |
|
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.
|
|
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.
|
|
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 |
|
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. |
|
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: |
|
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 |
|
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 |
|
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, |
|
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 |
|
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 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 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. |
|
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 |
|
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 |
|
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 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 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 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 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 |
|
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 |
|
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. |
|
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 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). |
|
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. |
|
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. |
|
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 |
|
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 |
|
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 |
|
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 |
|
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. |
|
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.
|