 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. |
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, , 12x
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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 |
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Tue Jul 1 13:41:36 2025, Xuesi Ma, Update, ,
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[Ma, Liu]
Slides |
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Thu Jul 10 16:41:18 2025, Christina, Update, TCS,
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[Christina, Ma, Tyler]
Pomona Box completed and is now on the server rack in 1119. Additionally, the photodetectors were connected to the
box and set up in front of the heater elements. |
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Tue Jul 15 10:40:23 2025, Christina, Update, TCS,
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[Christina, Ma, Tyler]
Yesterday, Ma and I started taking data for the PSD/CSD measurements while the photodetectors and one of the heater
elements are on (8) and are using the Red Pitaya to compare it to the data we took for the same measurements on the CyMAC. It will be finished Wednesday
morning, and then we plan on starting to take additional recordings in order to conduct the same type of comparison for the dark noise measurements. |
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Tue Jul 15 11:47:53 2025, Xuesi Ma, Infrastructure, ,
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Date and Time: Around 4:50 PM on July 1, 2025
Location and Temperature:
Back of the room 1119, around the working station: 85.7 °F
Front of the room 1119, around the doorway: |
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Tue Jul 22 12:20:29 2025, Christina, Update, TCS,
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[Ma, Christina, Tyler]
Figure 1 shows the following PSDs for channels 0-15 from the 14 hour test. Figure 2 shows the reduced chi squared and
CSD plots for both the 2 Hz and 16 Hz resolutions.
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Thu Jul 31 14:26:58 2025, Xuesi Ma, Update, ,
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[Tyler, Ma, Christina, Maple, Cece, Mary, Pooyan, Audrey]
We started by cleaning outside of the cleanroom wiping down the cable channel and working our way down while taking the pre-cleaning measurement.
We then stated wiping down the inside of clean room and vacuumed, mopped the outside of the cleanroom. Finally, we vacuumed, mopped, and wiped down the |
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Wed Aug 6 16:31:37 2025, Xuesi Ma, Update, ,
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Date and Time: Around 4:20 PM on Auguest 6, 2025
Location and Temperature:
Back of the room 1119, around the working station: 90.2 °F
Front of the room 1119, around the doorway: |
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Tue Aug 12 13:32:43 2025, Liu, Update, Interferometer Simulations,
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| Differences in Fused Silica parameters. |
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Tue Aug 12 13:46:56 2025, Christina, Update, ,
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Tue Sep 9 12:01:38 2025, Tyler, Ma, Update, ,
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| Slides |
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Tue Sep 9 13:08:44 2025, Xuesi Ma, Update, ,
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| Slides |
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