 Tue Jun 10 12:11:14 2025, Pooyan, Update, CDS, CDS update
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The MEDM models issue was fixed. The issue was that building the c1msc model alone was not enough and we had to re-build the c1iop as well, although
no changes has been made to the c1iop. Added a note in the wiki on this for future reference.
For
writing the fast channels to the frame files, our CDS system should have a GDS broadcaster. I followed this |
Wed Jun 11 16:19:37 2025, Pooyan, Update, CDS, CDS update 
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Fast channels recorded to .gwf frame files
Had to add a DAQ Channels block to the c1msc model for those channel to be recorded in the
.gwf frame files. The block is in the CDS_PARTS, and I just had to copy it to our model. Here is the example text for the channels: |
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Tue Aug 26 12:45:41 2025, Christina, Ma, Tyler, Update, CDS, RIN Update
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| Slides |
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Fri Jul 22 13:20:28 2022, Phoebe, Update, , Comsol
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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. |
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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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Wed Mar 8 18:35:52 2023, Pamella, Update, , Lab cleaning
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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 |
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Fri May 31 19:37:47 2024, Luke, Update, , Vacuum chamber Disassembly
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[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 |
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Wed Jun 19 18:45:14 2024, Luke, Update, , Vacuum chamber reassembly
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[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.
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Mon Aug 12 16:35:30 2024, Luke , Update, , Ringheater modeling Update
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Wed Oct 2 10:31:46 2024, Xuesi Ma, Configuration, , Group Meeting Slides 10/2/2024
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Group Meeting slides for Non-deterministic Heater Response.
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Wed Oct 2 12:05:42 2024, Luke , Update, , Ringheater modeling Update
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| Power point slides |
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Wed Oct 2 14:49:59 2024, Liu, Update, , FROSTI ETM actuation
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Proposed FROSTI ETM actuation on the HOM7 resonance.
Animation |
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Wed Oct 16 14:13:31 2024, Liu, Update, , FROSTI with non uniform absorption scattering sources
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| Slides |
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Wed Oct 23 12:33:54 2024, Luke , Update, , Zernike calculation update
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PowerPoint slides new
PowerPoint slides older |
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Mon Jan 27 11:29:38 2025, Xuesi Ma, Update, , Heater Element Test
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[Ma, Cece, Luke, Mary, Shane]
On Friday (Jan 24), we installed the heater elements on the stand. The heater elements are arranged from 1 to 8, oriented from right to left
as shown in Attachment 1. Each wire has been labeled according to its corresponding element number and type (e.g., RTD connections, heater connections). |
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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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Fri Jan 31 15:03:09 2025, Xuesi Ma, Update, , Heater Element Circuit Check
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table {
width: 100%;
border-collapse: collapse; /* Merges borders into a single line */
}
th,
td {
border: 1px solid #ddd; /* Adds a 1px solid border */
padding: 8px;
text-align: left;
}
th
{
background-color: #f2f2f2; /* Adds a light gray background to headers */
}
[Ma] Wed 1/29/2025 |
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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 18 10:02:16 2025, Xuesi Ma, Update, , Group Meeting Slides 2/18/2025
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| https://docs.google.com/presentation/d/1WiV2VqS0BzXNCK6VYYQ-Ty8xlHnzXatQaFbMf1-0rsY/edit?usp=sharing |
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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 4 03:33:18 2025, Xuesi Ma, Update, , Update 6x
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Spikes Appear Again, need to address it systematically.
Power on and off before reaching steady state ✔
At 12V, the rise and fall time of heater elements are different from 24V. |
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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 11:54:06 2025, Cece Ochoa, Update, , CE Cavity Design Update
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| Update on the design for the CE Cavity Mirrors |
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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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Mon Jul 14 23:50:22 2025, Tyler, Update, , Cymac ADC update
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I've been looking into the performances of individual channels on the Cymac by computing their individual PSDs and corresponding CSDs that show their
noise relation to each other. It appears some channels do have lower noise floors than others, and some combinations of these actually do perform
similar to the Red Pitaya (showing below the CSD between CHs 3 and 5), although it doesn't look like it's much of an improvement. The best method as of |
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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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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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Tue Aug 5 11:25:17 2025, Mary, Update, , point absorber and coated aperture in A#
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Simulating how point absorber defects on Advanced LIGO mirrors affect cavity performance by modeling a 4km LIGO-like arm cavity with a point absorber
fixed at 5cm off-center on the ITM. In this simulation, displaced the laser beam across a 21×21 grid while calculating the deformation, then measuring
the resulting power loss in the cavity (~283W circulating power). |
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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 12:35:19 2025, Tyler, Update, , CyMAC ADC Update
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[Christina, Ma, Tyler]
Updated CyMAC measurement, comparing 260 hrs of measurement time vs. 405 hrs. |
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Tue Aug 12 13:46:56 2025, Christina, Update, ,
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Tue Aug 12 13:49:24 2025, Mary, Update, , point absorber and coated aperture in A#
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Tue Sep 2 12:34:02 2025, Xuesi Ma, Update, , Updata for self heating effect on HOM
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| https://docs.google.com/presentation/d/19I1fx5BLEzYb4Qnc9P4rJnYAvWI8NqE2dsj9gSPyYzg/edit?usp=sharing |
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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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