 Tue Sep 2 18:33:38 2025, Liu, Infrastructure, General, New lab room 1125 layout and measurement 
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Action items for facilities
Ceiling lights replacement
Fume hood cleaned and refurbished
Sink countertop cleaning
Floor cleaned and waxed
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Tue Sep 2 12:41:33 2025, Liu, Update, Interferometer Simulations, Multi-ring FROSTI design for A# with ring heater optimization
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[Tyler, Liu]
Ring heater optimization, continued |
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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 2 11:53:34 2025, Tyler, Update, TCS, RIN Infrastructure Update (09/02/2025)
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[Ma, Tyler]
Below are slides discussing RIN infrastructural updates related to the CyMAC.
Slides
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Tue Aug 26 13:09:03 2025, Tyler, Update, TCS, O6 RH Update
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[Tyler]
Below are slides giving an update on RH O6 design progress.
Slides |
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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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Tue Aug 26 12:18:36 2025, Michael, Update, Interferometer Simulations, Squeezing Plots for SRC Parameter Space
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I've run a few plots of observed squeezing in the LIGO interferometer to fully ensure that the point we have selected is the optimal point for squeezing.
Contrary to what I expected, there seems to be much more degenerate "optimal" configurations. While the toroidal case may be near optimal, it seems that
the solution we found for a non astigmatic beam is not the only one. I will further explore this space to find more optimal/tolerant positions, which I |
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Tue Aug 26 12:14:24 2025, Liu, Update, Interferometer Simulations, Multi-ring FROSTI design for A# with ring heater optimization
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| Multi-ring FROSTI design for A# with ring heater optimization |
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Tue Aug 19 12:33:59 2025, Pooyan, Update, TCS, A# BS Update
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Tue Aug 19 12:08:40 2025, Christina, Update, TCS, RP Initial vs CyMAC Plot Comparisons
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[Tyler, Ma, Christina]
These are the frequency averaged and veto binned plots for the initial Red Pitaya and CyMAC systems. |
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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 Aug 12 13:46:56 2025, Christina, Update, ,
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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 13:28:00 2025, Tyler, Update, TCS, RH Fenicsx v. HV
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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 12:16:21 2025, Liu, Update, Interferometer Simulations, Multi-ring FROSTI optimization for A#
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| Multi-ring FROSTI optimization for A# with static polishing |
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Mon Aug 11 22:19:50 2025, Christina, Update, TCS, Red Pitaya Data Streaming
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[Ma, Tyler, Christina]
This past week, we were able to set up the data streaming for continuous acquisition to the PCs, and can conduct the initial tests now. We were
able to do this by:
Installing the correct OS ecosystems to each Red Pitaya
Installing the terminal streaming client
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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 5 12:21:04 2025, Liu, Update, Interferometer Simulations, FROSTI A# optimization
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| A# multi-ring FROSTI optimization |
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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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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 Jul 29 12:30:00 2025, Christina, Update, TCS, 260 hour ADC update
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[Ma, Christina, Tyler]
ADC CyMAC 260 hr, 8192Hz sampling rate channels V3 and Vref6 |
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Tue Jul 29 11:45:19 2025, Maple, Update, TCS, Meeting update
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Tue Jul 29 11:27:57 2025, Liu, Update, Interferometer Simulations, Multi-ring FROSTI optimization for A#
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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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Tue Jul 15 13:13:48 2025, Christina, Update, TCS, Photodetector optical post assembly
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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 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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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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Mon Jul 14 20:45:20 2025, Luke , Summary, Cleanroom, HEPA filter performance metrics
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[Luke, Luis]
We’ve been looking into methods for evaluating the performance of the HEPA filters in the clean room. Measuring flow rate appears to be
a promising approach, since the filter manual specifies a recommended minimum of 70 ft/min. |
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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 8 12:15:04 2025, Tyler, Update, TCS, CyMAC ADC Noise Update
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[Tyler, Christina, Ma, Mary]
Below is attached the ADC noise floor of two CyMAC channels vs the Red Pitaya.
The frequency resolution of these RIN spectra are 16 Hz, with N_meas = 19,308,426 for the CyMAC, and N_meas = 263,024. |
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Tue Jul 8 11:46:55 2025, Maple Matzner, Update, TCS, Update on SURF progress for Jul 8
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Mon Jul 7 17:44:04 2025, Tyler, Update, General, Lab Organization
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[Tyler, Pooyan, Ma, Cece, Luke, Luis, Christina, Maple]
After acquiring some new equipment for the labs, a few of us spent time on Thursday and Friday
sorting through everything and storing them into their appropriate places. New vacuum parts, power supplies, cables, and much more were included. The rooms
are now ready for the lab tours commencing Tuesday afternoon. |
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Mon Jul 7 16:39:18 2025, Christina, Update, TCS, Pomona Box Drawings
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| Below are the drawings for the pomona box modifications |
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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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Tue Jul 1 12:39:42 2025, Tyler, Update, TCS, A# FROSTI Profile Optimization Update
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[Tyler, Liu]
Slides |
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Tue Jul 1 11:04:00 2025, Christina, Update, TCS, FROSTI Reconstruction II
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[Ma, Tyler, Christina]
Finished external reconstruction of the FROSTI by installing all the pins to the 2 DB 25 connectors. To ensure everything
was operating correctly, we did electrical testing by testing continuity and by checking each of the heater elements' RTD and power resistance values and
comparing them to what was tabulated in January. Additionally, we organized the wires and added the stands. |
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Fri Jun 27 15:38:22 2025, Christina, Update, TCS, FROSTI Reconstruction
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[Tyler, Ma, Christina, Luke]
We threaded the wiring of the heater elements through the reflective surfaces and were able to attach each piece with the Macor spacers and
connect both sides. We used the guide rails and screws to ensure proper alignment. The only necessary step left is to add the additional external screws |
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Wed Jun 25 15:44:47 2025, Luke , Update, Cleanroom, Cleanroom cleaning
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[Luke, Luis, Tyler, Ma, Christina, Maple]
We started by cleaning outside of the cleanroom wiping down the cable channel and working our way down. We replaced the air filter in the HEPA
filter with what seemed to be the last one in storage. We then vacuumed outside, before wiping down the inside of the cleanroom. We then vacuumed, mopped, |
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Tue Jun 24 13:47:58 2025, Liu, Update, Interferometer Simulations, Alternative FROSTI A# optimization approach
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| Alternative FROSTI A# optimization approach |
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Tue Jun 24 12:45:16 2025, Tyler, Update, General, Updated ADC spectra
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[Tyler]
Updated ADC noise spectra measurements using diaggui.
NOTE: Will update plots with proper axes |
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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 Jun 17 12:46:47 2025, Tyler, Update, Electronics, CyMAC ADC Noise
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Below are results from power spectra measurements of the CyMAC ADC, computed form 30 hours of time series data, compared to the performance of the Red Pitaya.
The frequency resolution for the initial Cymac CSD is 2 Hz, and 216,000 spectra measurements are averaged together. As of now, it still looks like we haven't
reached the correlated noise floor of the CyMAC. We have a few days worth of data to take from, so I'll look into using a longer period of time. |
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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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Wed Jun 11 16:33:45 2025, Pooyan, Update, Computers, Luke's ray tracing hosting
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Hosted Lukes model on Chimay. It's available at https://richardsonlab.ucr.edu/real-time-frosti
The
sourcecode is at Github. It is clones at /var/www/html/real-time-frosti, and
this is the block added to nginx config file at /etc/nginx/sites-available/default : |
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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 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 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 |
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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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