ligo-ex ligo-ds
  Richardson Lab Experimental Log, Page 12 of 15  Not logged in ELOG logo
ID Date Authordown Type Category Subject Text Attachments
  670   Thu Jan 22 10:10:31 2026 JonInfrastructureGeneralLab floor plansAttached are the starting and final floor
plans for the February 2026 expansion into
the Physics 1125 lab.
 Pre-Feb-2026.pngPost-Feb-2026.png 
  676   Thu Feb 5 11:42:47 2026 JonInfrastructureGeneralLab floor plans [Audrey, Cece, Jon, Ma, Mary, Michael,
Pooyan, Tyler, Shane] 
 We have completed the preliminary
 image.jpgimage_1.jpgimage_3.jpg 
  26   Fri Feb 10 16:34:45 2023 Huy Tuong CaoInfrastructureClean & BakeNitrogen gas tank ready to useCao,


Today I fixed the final bit related
to the nitrogen gas tank, which is to apply
sealing tape to M-NPT connector of the hose
 AirGunSealed.jpg 
  704   Fri Apr 24 23:55:50 2026 DhatriSummaryInterferometer Simulations   [Sidd, Pooyan, Dhatri]  In the group meeting on 04/23/26, we   
  710   Tue May 5 14:13:45 2026 DhatriSummaryInterferometer SimulationsMode mismatch[Pooyan, Tyler, Ceci, Dhatri] 

Attached are the plots generated by
running the newer code here for input power
 llo_power_up_1461976383.pdf 
  359   Mon Apr 8 14:57:41 2024 Cynthia, PooyanUpdateInterferometer Simulationsperformed cavity scans for O4 O5, and coupled cavity    LIGO_update_week1.pdf 
  688   Thu Feb 26 20:25:10 2026 Cynthia LiangUpdateInterferometer SimulationsPoint Absorber+Miscentering Simulation   update_2_18_Merged.pdf 
  343   Tue Feb 27 09:06:29 2024 Cynthia UpdateInterferometer Simulationscavity scan with higher order input laserI performed a few cavity scan with the inputing
laser with a different mode (not pure 00).
For each laser I included a graph for just
 ligoPre_2_27.pdf 
  363   Mon Apr 22 15:06:33 2024 Cynthia UpdateInterferometer Simulationscavity scan update[Cynthia,Pooyan]
Completed some simulations
injecting 0-10th order modes. Some graphs
will be used for the poster after some further
 LIGO_4_22.pdf 
  381   Mon Jun 24 14:28:51 2024 Cynthia UpdateInterferometer SimulationsSIS cavity with thermal effecttried to run a cavity scan with thermal deformation
and ring heater for ITM04 ETM08 (aLIGO mirrors).
Not sure about the accuracy of the graph
 ETM08thermal.png 
  392   Mon Jul 1 15:19:42 2024 Cynthia UpdateInterferometer SimulationsO4 and O5 mirror cavity scans with thermal effect   cavityScan_07_01.pdf 
  408   Mon Jul 15 15:44:52 2024 Cynthia UpdateInterferometer Simulationsperformed cavity scans with thermal effects and ring heater   cavity_scan_07_15.pdf 
  424   Mon Aug 12 17:09:04 2024 Cynthia UpdateInterferometer SimulationsO4 vs O5 cavity scans with ITM plume guess or ETMSo far the proposed solution for what to use
for O5 ITM mirror for SIS simulations is
either the plume guess file or using the
 O5_plots_and_tables.pdfO4_plots_and_tables.pdfETM12mapO5.pngScreenshot_2024-08-12_at_5.05.31_PM.png 
  428   Mon Aug 26 14:42:04 2024 Cynthia UpdateInterferometer Simulationscurrent status on cavity scan with effects of FROSTII used the code and arm cavity model used
for previous O5 study on mirrors and HOM
(the pdf of the study and the result can
 LIGO_updates_8_26.pdf 
  443   Mon Sep 16 15:18:59 2024 Cynthia UpdateInterferometer Simulationsa breakdown of FROSTI and thermal effects and the resulting cavity scan    ligo_update_9_16_(1).pdf 
  446   Mon Sep 23 15:00:41 2024 Cynthia UpdateInterferometer Simulationscorrections on assumption for O5 coatingThe document recording ETM07 and ETM08 coating
(T2300093) was discussed: 

the current
plume files are not necessarily correct in
 Uncoated_S1_ETM07-v2.pdf 
  587   Tue Jun 3 12:16:13 2025 Cynthia UpdateInterferometer SimulationsPoint absorber simulation on radially averaged profile    update_6_3.pdf 
  679   Thu Feb 5 13:34:13 2026 Cynthia UpdateInterferometer SimulationsPoint absorber + miscentering simulation    update2_5_(3).pdf 
  361   Mon Apr 15 15:25:10 2024 CynthiaUpdateInterferometer Simulationsprogress on simulation so far   LIGO_update_week3_(2).pdf 
  374   Mon Jun 3 14:59:44 2024 CynthiaUpdateInterferometer SimulationsCreated cavity scan with LG modes    ligo_update_6_3.pdf 
  426   Mon Aug 19 07:11:55 2024 CynthiaUpdateInterferometer Simulationscavity scans with FROSTI effects    LIGO_update_8_19.pdf 
  454   Wed Oct 2 13:38:00 2024 CynthiaUpdateInterferometer Simulationscavity scan with averaged O4 ETM coating as plume   O5plumevsCoating.pngO5CoatAvgpt5.pngO5AVgcoatingFROSTIpt5.PNG 
  526   Tue Feb 25 10:56:25 2025 CynthiaUpdateInterferometer Simulationsmirror coating added for simulation rerunI have tried to rerun the simulation on finesse
after adding the mirror coating. The result
has a large fluctuation in required input
 updats_(3).pdf 
  530   Tue Mar 4 10:18:43 2025 CynthiaUpdateInterferometer Simulationsattempted to remove curvature and tilt for the coating    3_4_updates.pdf 
  540   Tue Mar 11 11:28:52 2025 CynthiaUpdateInterferometer Simulationsflattening mirror to study power discrepency   updates_3_11_(1).pdf 
  554   Tue Apr 15 11:37:17 2025 CynthiaUpdateInterferometer SimulationsFinishing up mirror coating map step   updates_4_15_2025.pdf 
  686   Thu Feb 19 12:34:18 2026 CynthiaUpdateInterferometer SimulationsPoint absorber simulation   update_2_18.pdf 
  692   Thu Mar 12 12:48:58 2026 CynthiaUpdateInterferometer SimulationsNew Result of point absorber+miscentering   Untitled_presentation_(1).pdf 
  697   Thu Apr 9 12:50:28 2026 CynthiaUpdateInterferometer SimulationsO5 Test mass https://docs.google.com/presentation/d/1vJPZ9H_umgsZacCLgsqAUZWjn7-6l77np3E_YgaSy_M/edit?usp=sharing   
  698   Thu Apr 16 12:53:30 2026 CynthiaUpdateInterferometer SimulationsO5 Test mass    4_16_update.pdf 
  703   Thu Apr 23 12:47:05 2026 CynthiaUpdateInterferometer SimulationsO5 Test mass    4_23_26.pdf 
  707   Thu Apr 30 13:23:55 2026 CynthiaUpdateInterferometer SimulationsO5 Test mass frequency locations of 5-8th order mode across
arm power of 0-800kW
 scan_5-8.png 
  711   Thu May 7 13:35:14 2026 CynthiaUpdateInterferometer SimulationsO5 Test mass    Screenshot_2026-05-07_133453.png 
  712   Thu May 14 12:37:17 2026 CynthiaUpdateMeasuring Noise in InterferometerO5 Test mass design   update_5_13.pdf 
  713   Thu May 14 13:42:57 2026 CynthiaUpdateInterferometer Simulationsless-roll-off coating    e6caa8cf-2a96-49d8-a8b7-b84feab55404.png 
  714   Thu May 28 12:54:38 2026 CynthiaUpdateInterferometer SimulationsO5 Test mass    5_28_update_(1).pdf 
  716   Thu Jun 4 13:30:46 2026 CynthiaUpdateInterferometer SimulationsO5 Test mass Presentation   Nonspherical_polishing_profile_design_recommendation.pdf 
  723   Thu Jun 25 13:45:11 2026 CynthiaUpdateInterferometer SimulationsPoster Drafthttps://docs.google.com/presentation/d/1tpYjs-gOfZgFFkffU0kv7rYKHu0xtfPyMZqF1qXHIOQ/edit?usp=sharing   
  738   Thu Jul 16 13:14:26 2026 CynthiaUpdateInterferometer SimulationsLIGO pre-figuring team meeting summary Pre-figuring meeting 7/14: 

 - the
non-uniformity brought by annealing for ETM14
and 11 seems to be higher than expected,
  
  742   Wed Jul 29 23:56:29 2026 CynthiaUpdateInterferometer SimulationsPre-figuring meeting 7/28 summery Pre-figuring meeting 7/14: 

 - using
the change in surface from annealing, Hiro
did some study on HOM scattering/losses from
 IMG_6504.jpg 
  751   Thu Sep 10 13:05:47 2026 CynthiaUpdateInterferometer SimulationsBeam Miscentering PRG Distribution generated the global optimum PRG, thermal
actuator powers for FROSTI Dual for a few
points (only 5 y beam position finished running
 PRG_distribution.pngqn_code.png 
  635   Tue Aug 26 12:45:41 2025 Christina, Ma, TylerUpdateCDSRIN UpdateSlides   
  600   Fri Jun 27 15:38:22 2025 ChristinaUpdateTCSFROSTI Reconstruction [Tyler, Ma, Christina, Luke] 

 We threaded the wiring of the
heater elements through the reflective surfaces
 IMG_4009.png 
  601   Tue Jul 1 11:04:00 2025 ChristinaUpdateTCSFROSTI Reconstruction II [Ma, Tyler, Christina] 

 Finished
external reconstruction of the FROSTI by
installing all the pins to the 2 DB 25 connectors.
 IMG_4042.png 
  604   Mon Jul 7 16:39:18 2025 ChristinaUpdateTCSPomona Box Drawings Below are the drawings for the pomona
box modifications 
 pbdwg1.PDFpbdwg2.pdf 
  608   Thu Jul 10 16:41:18 2025 ChristinaUpdateTCS  [Christina, Ma, Tyler] 

 Pomona
Box completed and is now on the server rack
in 1119. Additionally, the photodetectors
 2994921113032912040.JPG4717009101108174053.JPG5782646701589802125.JPG 
  611   Tue Jul 15 10:40:23 2025 ChristinaUpdateTCS  [Christina, Ma, Tyler] 

 Yesterday,
Ma and I started taking data for the PSD/CSD
measurements while the photodetectors and
 rpon.png 
  614   Tue Jul 15 13:13:48 2025 ChristinaUpdateTCSPhotodetector optical post assembly   pdreassembly.png 
  615   Tue Jul 22 12:20:29 2025 ChristinaUpdateTCS  [Ma, Christina, Tyler] 
 Figure
1 shows the following PSDs for channels 0-15
from the 14 hour test. Figure 2 shows the
 PSDch0-15.pngCSD2hz_16hz.png 
  619   Tue Jul 29 12:30:00 2025 ChristinaUpdateTCS260 hour ADC update [Ma, Christina, Tyler] 

ADC CyMAC
260 hr, 8192Hz sampling rate channels V3
and Vref6
 CSD_06_28_25_270hr.png 
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