 Tue May 16 11:56:33 2023, Peter, Update, VLC Electronics, 532nm Intensity Measurement 
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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 |
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Thu May 18 14:07:08 2023, Peter, Update, VLC Update, 532nm Intensity Measurement
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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 |
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Tue Feb 28 19:31:05 2023, Peter, Update, VLC Electronics, 532 M2 Measurements
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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 |
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Tue Feb 28 19:33:51 2023, Peter, Update, , 532 M2 Measurements
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| Y axis of plot in units of micrometers. X axis in units of millimeters. |
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Thu Mar 9 12:03:59 2023, Peter, Update, VLC Electronics, 532 M2 Measurements
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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. |
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Fri Mar 10 12:08:09 2023, Peter, Update, VLC Electronics, 532 M2 Measurements
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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. |
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Tue Apr 4 09:39:58 2023, Peter, Update, VLC Electronics, 532 M2 Measurements
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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 |
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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 Nov 17 14:06:01 2023, Shane, Update, Cleanroom, 5 zone particle count
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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. |
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Thu Nov 9 19:06:46 2023, shane, Update, Cleanroom, 5 zone cleanroom measurement
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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.
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Fri Feb 2 19:08:20 2024, Aiden, Update, VAC, 1st Hot Element RGA Scan
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| 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. |
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Tue Nov 21 14:47:24 2023, Tyler, Update, Lore, 1129 Workbench Assembly Update 1
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[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. |
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Mon Nov 27 14:22:30 2023, Tyler, Update, Lore, 1129 Assembly Update
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[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.
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Fri Apr 21 15:21:18 2023, Pamella, Update, FLIR,
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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 |
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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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Mon Jan 8 20:24:53 2024, Aiden, Update, General,
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[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 |
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Tue Jan 16 16:11:41 2024, Aiden, Update, VAC,
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[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 |
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Mon Jul 1 11:45:45 2024, Sid, Update, Interferometer Simulations,
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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. |
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Tue Aug 6 13:07:07 2024, Xuejun, Update, Interferometer Simulations,
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[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 |
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Wed Nov 13 14:06:00 2024, Luke , Update, General,
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| slides |
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Mon Jan 27 23:35:28 2025, Xuesi Ma, Update, ,
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[Ma]
Installed all the pins to the peek DB 25 connectors |
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Mon Feb 3 13:17:21 2025, Xuesi Ma, Update, ,
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[Ma]
changed all zip ties to peek zip ties, and grouped wires together. The setup is ready to go into the chamber. |
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Tue Feb 18 10:01:07 2025, Xuesi Ma, Update, ,
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[Ma, Pooyan, Tyler]
On Friday, we connected the vacuum chamber with the Cymac. |
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Tue Feb 25 10:02:32 2025, Xuesi Ma, Update, ,
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1424039912.625576 2025/02/19 22:38:14 UTC Time start
24V 2.8A right after start all 8 elements
1424044804.902443 2025/02/19 23:59:46 UTC Time stop |
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Tue Mar 11 10:43:57 2025, Xuesi Ma, Update, ,
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Continue investigation in the spikes
Pulsed ADC with a function generator and find no spikes. Rules out ADC for causing the spikes
Loopback test that bypasses the FROSTI Chassis shows spikes (spikes happened on all channels at the same time) |
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Mon Mar 31 15:41:56 2025, Xuesi Ma, Update, ,
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The result from AI Chassis bypass test showed that the AI Chassis may be the problem. There are no spikes from DAC's direct output.
All chassis except timing chassis are turned off. Power supplies for 24V, 18V, and -18V are turned off
The AI chassis has been taken out of the rack for further inspection |
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Tue Apr 1 11:47:08 2025, Liu, Update, ,
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Mon Apr 7 13:28:49 2025, Xuesi Ma, Update, ,
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Test 1: Adapter Board Connected to Filter Board
Setup: AI Chassis is powered on. Signal is measured directly from
the adapter board. All other ports on the adapter board are connected to the filter board.
Observation: Two distinct spikes
observed at the beginning of the measurement.
Test 2: Adapter Board Disconnected from Filter Board
Setup: |
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Tue Apr 15 11:13:43 2025, Xuesi Ma, Update, ,
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Test 4: AI Chassis ground isolation
Setup: AI Chassis isolated from the ground with readout directly connected to
adapter board
Observation: No spike observed.
Test 5: Ribbon cable check
Setup:
AI Chassis remains isolated from the ground. The signal is measured after the ribbon cable. (Attachment 3)
Observation: No |
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Tue Apr 22 12:08:46 2025, Xuesi Ma, Update, ,
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Test 7: Reconnect ribbon cables
Setup: Reconnect all the ribbon cables, and turned on the AI Chassis while isolated
rack
Observation: No spike observed.
Test 8: Reconnect to rack
Setup:
Reconnect the AI Chassis to the rack.
Observation: No spike observed.
Test 9: Restore to original position.
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Tue May 6 13:19:31 2025, Xuesi Ma, Update, ,
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Tue May 13 12:35:01 2025, Xuesi Ma, Update, ,
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Mon May 19 10:59:14 2025, Xuesi Ma, Infrastructure, ,
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Status Update
Previous Status:
All Sorensen power supplies were turned off. The Cymac system was down (all chassis were offline).
If you need more information or assistance in turning them back on, please contact Xuesi Ma.
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Tue May 27 12:52:22 2025, Xuesi Ma, Update, , 6x
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Using the configuration in section 2.11.1 in the Sorensen installation and operation manual (attached below), I'm able to remote control the Sorensen
power supply.
I use DAC VEXC8 as the external voltage source and a breakout board to match the configuration of connector J3. |
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Tue Jun 3 13:08:47 2025, Xuesi Ma, Update, ,
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We currently have the parts for a DB9 connector but need parts for a DB25 connector, where did we get the parts for the DB9 connector? We may be able
to use the same company for the DB25 connector.
Also need a cable for the connectors. Find a DB9 to DB9 cable in 1129, not sure if I can disassemble it and use just the cable. |
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Tue Jun 3 13:16:53 2025, Xuesi Ma, Infrastructure, ,
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Date and Time: Around 3:50 PM on June 2, 2025
Location and Temperature:
Back of the room 1119, around the working station: 86 °F
Front of the room 1119, around the doorway: 84.1 |
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Tue Jun 10 12:13:00 2025, Xuesi Ma, Update, ,
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By measuring the resistance of the ladder, I obtained a graph of resistance as a function of voltage.
All the heater elements behave consistently, showing only a small standard deviation.
However, heater element 5 shows a significantly larger standard deviation. |
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Tue Jun 17 12:22:43 2025, Xuesi Ma, Update, , 11x
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CYMAC
Remote Control Cable Documentation
.connector {
background-color: #f8f9fa;
border-left: 4px solid
#3498db;
padding: 10px 15px;
margin: 15px 0;
}
.pin-table {
width: 100%;
border-collapse: |
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Tue Jun 24 11:50:15 2025, Xuesi Ma, Update, ,
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Heater
Element Resistance Test Results
.heater-test-container {
font-family: Arial, sans-serif;
line-height:
1.6;
max-width: 800px;
margin: 20px auto;
padding: 20px;
color: #333;
}
.heater-test-container |