 Mon Oct 30 18:15:13 2023, Shane, Update, CDS, CyMAC chassis mounted and progress on power connections 
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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 |
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Mon Oct 30 11:03:56 2023, Tyler, Update, Scripts/Programs,
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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.
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Fri Oct 27 15:16:31 2023, Aiden, Update, VAC, Vacuum Leak Test
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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
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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).
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Fri Oct 27 15:28:30 2023, Shane, Update, CDS, AA and AI chassis for CyMAC powered on and functional
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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. |
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Thu Oct 26 13:00:45 2023, Aiden, Update, VAC, Vacuum Chamber Baking Update
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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. |
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Mon Oct 23 18:02:23 2023, Shane, Jon, Update, CDS, Timing chassis assembly complete
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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). |
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Mon Oct 23 11:28:05 2023, Tyler, Update, Cameras, FLIR Camera Code Updates
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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 |
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Mon Oct 23 07:28:57 2023, Peter, Update, VLC Update, VLC Mode Matching
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| I have attached a pdf with slides of my latest updates. |
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Fri Oct 20 16:38:02 2023, Shane, Aiden, Update, Cleanroom, Cleanrooom cleaning and particle count
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[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 |
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Thu Oct 19 11:41:04 2023, Aiden, Update, VAC, Vacuum Chamber Baking Update 6x
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[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 |
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Thu Oct 12 12:11:10 2023, Aiden, Update, VAC, Vacuum chamber Helium leak test
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[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.
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Wed Oct 11 20:47:11 2023, Jon, Update, VAC, Vacuum upgrade begins
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[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 |
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Mon Oct 9 21:41:24 2023, Aiden, Update, Clean & Bake, Clean and Bake Batch 19
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| Bagged and tagged the parts from batch 18. Started the Copper batch that includes all the gaskets needed to start the vacuum chamber upgrade. |
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Mon Oct 9 16:59:21 2023, Shane, Jon, Update, CDS, timing chassis power cable and AI chassis testing for CyMAC
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[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, |
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Mon Oct 9 11:29:37 2023, Tyler, Update, Electronics, PSD/CSD Plot Updates
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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 |
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Mon Oct 9 11:06:17 2023, Peter, Update, VLC Update, VLC Launch Chain
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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. |
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Sat Oct 7 17:10:27 2023, Aiden, Update, Clean & Bake, Clean and Bake Batch 18
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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. |
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Tue Oct 3 15:07:48 2023, Aiden, Update, Clean & Bake, Clean and Bake Batch 17
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| Cleaned and baked all the stainless steel parts in Batch 17. Check data base for more details on this. |
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Fri Sep 29 17:27:30 2023, Shane, Jon, Update, CDS, Timing chassis assembly progress (CyMAC)
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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 |
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Fri Sep 29 11:53:54 2023, Shane, Update, Cleanroom, 5 zone particle count measurement in cleanroom
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| Today's 5 zone measurement of cleanroom particulate concentration is attached |
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Fri Sep 29 11:22:33 2023, Shane, Aiden, Update, Cleanroom, cleaning and particle count
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[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 |
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Thu Sep 28 15:17:13 2023, Aiden, Update, Clean & Bake, Clean and Bake Batch 16
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| Bagged and Tagged the parts from batch 15 and started baking batch 16 which includes the 6" to 8" reducer. |
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Fri Sep 15 17:33:35 2023, Aiden, Update, VAC, Vacuum Chamber Baking Update
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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. |
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Thu Sep 14 17:05:38 2023, Shane, Jon, Update, CDS, Timing chassis setup and testing
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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. |
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Tue Sep 12 15:31:31 2023, Aiden, Update, Clean & Bake, Clean and Bake Batch 15
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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 |
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Mon Sep 11 16:02:42 2023, Aiden, Update, VAC, VAC System Heating Update
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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 |
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Fri Sep 8 16:10:43 2023, Aiden, Update, VAC, VAC System Heating Update
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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. |
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Thu Sep 7 19:24:25 2023, Peter, Update, VLC Update, VLC Launch Chain
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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) |
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Tue Sep 5 16:43:19 2023, Aiden, Update, General, VAC System Heating Update
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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. |
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Fri Sep 1 19:21:19 2023, Aiden, Update, VAC, VAC System Heating Update
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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 |
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Thu Aug 31 12:56:29 2023, Aiden, Update, VAC, Vacuum Chamber Baking Update
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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 |
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Tue Aug 29 22:07:38 2023, Aiden, Update, General, Electronic Bench
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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. |
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Tue Aug 29 19:09:21 2023, Aiden, Update, VAC, Vacuum Chamber Baking Update
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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. |
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Mon Aug 28 14:43:50 2023, Aiden, Update, VAC, Vacuum Chamber Baking Update
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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 |
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Mon Aug 21 17:13:25 2023, Aiden, Update, VAC, Vacuum Chamber Baking Update
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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 |
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Thu Aug 17 15:18:48 2023, Aiden, Update, VAC, VAC Heating System Update
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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 |
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Thu Aug 17 15:02:44 2023, Aiden, Update, VAC, VAC Heating System Update 11x
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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 |
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Wed Aug 16 17:17:02 2023, Shane, Jon, Update, CDS, Binary input chassis powering correctly
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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. |
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Wed Aug 16 16:55:40 2023, Shane, Jon, Update, CDS, external power supply cables finished
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| All four external power supply cables for the CyMAC chassis are now assembled. Using them now to test if chassis power up correctly. |
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Tue Aug 15 16:10:06 2023, Celeste, Update, TCS, 8/15/2023 Simulation Progress
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Tue Aug 15 16:04:23 2023, Aiden, Update, VAC, VAC Heating System Update 6x
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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.
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Tue Aug 15 13:32:37 2023, Sophia, Update, Scripts/Programs, Update on Laser Noise Data Collection and Analysis: Dynamic CSD and PSD Plots
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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 |
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Tue Aug 15 10:35:00 2023, Sophia, Update, Scripts/Programs, Update on Laser Noise Data Collection and Analysis: Dynamic CSD and PSD Plots
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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 |
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Fri Aug 11 18:32:00 2023, Aiden, Update, VAC, VAC System Heating Update 11x
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[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 |
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Fri Aug 11 10:57:20 2023, Celeste, Update, TCS, 8/11/23 Simulation Progress
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Thu Aug 10 18:32:39 2023, Aiden, Update, VAC, VAC System Heating Update
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[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 |
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Thu Aug 10 14:36:00 2023, Aiden, Update, VAC, VAC System Heating Update
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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. |
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Thu Aug 10 15:10:12 2023, Jon, Update, VAC, VAC System Heating Update
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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.
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Thu Aug 10 14:13:38 2023, Celeste, Update, TCS, 8/10/23, Simulation Graphical Progress
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Wed Aug 9 17:35:26 2023, Shane, Update, CDS, Binary output chassis finished
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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. |
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Wed Aug 9 11:32:56 2023, Jon, Infrastructure, General, New power cables
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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 |