 Fri Oct 10 14:40:23 2025, Xuesi Ma, Update, VAC, Pressure gauge Swap
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[Tyler, Ma]
We are suspecting a pressure gauge problem. The electronic unit of the main chamber pressure gauge and the electronic unit of the RGA chamber
pressure gauge are swapped. |
Thu Oct 9 12:18:14 2025, Liu, Update, Interferometer Simulations, Multi-ring FROSTI optimization for A# 
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Wed Oct 8 14:45:12 2025, Xuesi Ma, Infrastructure, VAC, RGA Chamber Pressure
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| RGA Chamber pressure is currently at 3.68e-4 torr. |
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Tue Sep 30 12:51:23 2025, Tyler, Update, TCS, O6 RH Update 09/30/2025
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| Slides |
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Tue Sep 30 12:26:15 2025, Liu, Update, Interferometer Simulations, FROSTI optimization for A#
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Tue Sep 23 13:10:07 2025, Tyler, Update, TCS, RH O6 Update 09/23/25
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| Slides |
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Tue Sep 23 12:39:29 2025, Liu, Update, Interferometer Simulations, Multi-ring FROSTI optimization for A#
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Tue Sep 16 12:47:29 2025, Xuesi Ma, Update, Interferometer Simulations, Frosti actuation impact analysis
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| Slides |
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Tue Sep 16 12:18:09 2025, Liu, Update, Interferometer Simulations, Grid search optimization for single-ring FROSTI
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| Grid search optimization for single-ring FROSTI |
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Tue Sep 9 13:08:44 2025, Xuesi Ma, Update, ,
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| Slides |
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Tue Sep 9 12:13:38 2025, Liu, Update, Interferometer Simulations, Multi-ring FROSTI optimization for A# with grid search
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| Multi-ring FROSTI optimization based on IFO metrics for A# with grid search |
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Tue Sep 9 12:06:38 2025, Tyler, Update, TCS, RH O6 Update
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| Slides |
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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 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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