ligo-ex ligo-ds
  Richardson Lab Experimental Log, Page 7 of 14  Not logged in ELOG logo
New entries since:Wed Dec 31 16:00:00 1969
ID Date Author Type Categorydown Subject Text Attachments
  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 
  548   Tue Apr 8 00:17:01 2025 MichaelUpdateInterferometer SimulationsSqueezing Performance Graphs for Case With and Without Toroidal Mirrors in LIGOI've created some graphs for the frequency
dependent observed squeezing level in LIGO
for both the nominal case and the case where
  
  554   Tue Apr 15 11:37:17 2025 CynthiaUpdateInterferometer SimulationsFinishing up mirror coating map step   updates_4_15_2025.pdf 
  555   Thu Apr 17 12:12:29 2025 LiuHowToInterferometer SimulationsPreventing Thread Contention in Multiprocessing with Finesse and Cython
    Avoiding Thread
Contention When Using Multiprocessing
  
  556   Mon Apr 21 16:56:42 2025 MichaelUpdateInterferometer SimulationsFixed Observed Squeezing Curve for Toroidal Mirror CaseWe've resolved the issue with the observed
squeezing curve for the toroidal mirror case
showing worse performance at lower frequencies
 updated_observed_squeezing_plot.png 
  558   Tue Apr 22 11:04:31 2025 LiuUpdateInterferometer SimulationsTest Mass Thermal State Decoder Update with Interferometer Operation   Update.pdf 
  564   Tue Apr 29 10:59:25 2025 LiuUpdateInterferometer SimulationsTest Mass Thermal State Decoder with Updated Comparison Cases    Update.pdf 
  571   Tue May 6 13:07:34 2025 MichaelUpdateInterferometer SimulationsInitial Convergence Plots for Toroidal Mirrors Project   Convergence_Plots_5_6_25.pdfConvergence_Plots_5_6_25-1.pdfaperture_num_points_convergence.png 
  582   Mon May 26 23:24:33 2025 MichaelUpdateInterferometer SimulationsInitial Monte Carlo Simulations for Toroidal Mirrors ProjectI've run an initial Monte Carlo simulation
for statistical comparison of toroidal mirrors
for the dual FROSTI TCS case. Below is the
  
  587   Tue Jun 3 12:16:13 2025 Cynthia UpdateInterferometer SimulationsPoint absorber simulation on radially averaged profile    update_6_3.pdf 
  598   Tue Jun 24 13:47:58 2025 LiuUpdateInterferometer SimulationsAlternative FROSTI A# optimization approachAlternative FROSTI A# optimization approach  Update.pdf 
  616   Tue Jul 29 11:27:57 2025 LiuUpdateInterferometer SimulationsMulti-ring FROSTI optimization for A#   Update.pdfscene-export-temp.htmlscene-export-deformation.html 
  622   Tue Aug 5 12:21:04 2025 LiuUpdateInterferometer SimulationsFROSTI A# optimizationA# multi-ring FROSTI optimization  Update.pdf 
  625   Tue Aug 12 12:16:21 2025 LiuUpdateInterferometer SimulationsMulti-ring FROSTI optimization for A#Multi-ring FROSTI optimization for A# with
static polishing
 Update.pdf 
  628   Tue Aug 12 13:32:43 2025 LiuUpdateInterferometer Simulations Differences in Fused Silica parameters.  Screenshot_2025-08-12_at_1.31.11_PM.pngScreenshot_2025-08-12_at_1.31.17_PM.png 
  633   Tue Aug 26 12:14:24 2025 LiuUpdateInterferometer SimulationsMulti-ring FROSTI design for A# with ring heater optimization Multi-ring FROSTI design for A# with ring
heater optimization 
 Update_(1).pdf 
  634   Tue Aug 26 12:18:36 2025 MichaelUpdateInterferometer SimulationsSqueezing Plots for SRC Parameter SpaceI've run a few plots of observed squeezing
in the LIGO interferometer to fully ensure
that the point we have selected is the optimal
 Screenshot_2025-08-26_at_12-16-01_LIGO_Project_Log_-_Google_Docs.pngScreenshot_2025-08-26_at_12-16-32_LIGO_Project_Log_-_Google_Docs.pngScreenshot_2025-08-26_at_12-17-26_LIGO_Project_Log_-_Google_Docs.png 
  639   Tue Sep 2 12:41:33 2025 LiuUpdateInterferometer SimulationsMulti-ring FROSTI design for A# with ring heater optimization[Tyler, Liu]

Ring heater optimization,
continued
 Update.pdf 
  643   Tue Sep 9 12:13:38 2025 LiuUpdateInterferometer SimulationsMulti-ring FROSTI optimization for A# with grid searchMulti-ring FROSTI optimization based on IFO
metrics for A# with grid search
 Update.pdf 
  645   Tue Sep 16 12:18:09 2025 LiuUpdateInterferometer SimulationsGrid search optimization for single-ring FROSTIGrid search optimization for single-ring FROSTI  Update.pdf 
  646   Tue Sep 16 12:47:29 2025 Xuesi MaUpdateInterferometer SimulationsFrosti actuation impact analysisSlides   
  647   Tue Sep 23 12:39:29 2025 LiuUpdateInterferometer SimulationsMulti-ring FROSTI optimization for A#   Update.pdf 
  649   Tue Sep 30 12:26:15 2025 LiuUpdateInterferometer SimulationsFROSTI optimization for A#   Update.pdf 
  652   Thu Oct 9 12:18:14 2025 LiuUpdateInterferometer SimulationsMulti-ring FROSTI optimization for A#   Update.pdf 
  654   Thu Oct 16 10:31:20 2025 LiuUpdateInterferometer SimulationsMulti-ring FROSTI optimization for A#Two-ring FROSTI grid search with 4D parameter
space search and visualization
 interactive_plot_dropdown.htmlUpdate.pdf 
  655   Thu Oct 23 10:07:51 2025 LiuUpdateInterferometer SimulationsMulti-ring FROSTI optimization for A#4D parameter space visualization and dimensionality
reduction for better optimization
 loss_embedding.htmlUpdate.pdf 
  Draft   Thu Oct 23 11:34:05 2025 MichaelUpdateInterferometer SimulationsUpdated Exploration into Different SRC Mirror Configurations for Improved Squeezing   Update_Slides_10_23_25.pdfUpdate_Slides_10_30_25.pdf 
  658   Thu Oct 30 11:45:44 2025 LiuUpdateInterferometer SimulationsMulti-ring FROSTI optimization for A#Multi-ring FROSTI optimization for A#: dimensionality
reduction with PCA vs. t-SNE
 Update.pdf 
  660   Thu Nov 13 12:39:01 2025 MaryUpdateInterferometer Simulations    PA.pdf 
  679   Thu Feb 5 13:34:13 2026 Cynthia UpdateInterferometer SimulationsPoint absorber + miscentering simulation    update2_5_(3).pdf 
  680   Thu Feb 5 13:49:31 2026 MichaelUpdateInterferometer SimulationsUpdating Squeezing Mode Matching LogicAfter some tests, I have determined that the
squeezer in the aLIGO katscript is currently
being matched to the SRC. This logic will
 screenshot2.pngscreenshot1.png 
  681   Thu Feb 5 13:59:42 2026 MaryUpdateInterferometer Simulations    112.pdf 
  686   Thu Feb 19 12:34:18 2026 CynthiaUpdateInterferometer SimulationsPoint absorber simulation   update_2_18.pdf 
  688   Thu Feb 26 20:25:10 2026 Cynthia LiangUpdateInterferometer SimulationsPoint Absorber+Miscentering Simulation   update_2_18_Merged.pdf 
  692   Thu Mar 12 12:48:58 2026 CynthiaUpdateInterferometer SimulationsNew Result of point absorber+miscentering   Untitled_presentation_(1).pdf 
  Draft   Thu Mar 12 13:18:49 2026 Cece OchoaUpdateInterferometer SimulationsCE Cavity Design UpdateAnimation showing how modes shift in the CE
arm cavity for radius 27581m and mirror radius
of40cm as the laser powers up the 1.5 MW.
  
  2   Thu Jun 2 16:14:58 2022 JonHowToGeneralCustom conda environment on JupyterHubCross-linking instructions: How
to run a Jupyter notebook in your custom
Conda environment
  
  7   Mon Jul 11 14:29:45 2022 JonOmnistructureGeneralHEPA filter installedToday I unpacked and installed the new HEPA
filter for the lab. It is an Omni CleanAir
OCA1210 capable of 1200 CFM. This flow rate
 IMG_1530.png 
  16   Mon Jan 23 17:26:15 2023 Peter CarneyUpdateGeneralOven cleaningAiden and Cao 
Turned on the oven to 120
deg C for 12 hours. After 12 hours, put it
at 200 deg C for 48 hours. 
  
  17   Thu Jan 26 18:58:25 2023 AidenUpdateGeneralOven HeatingAiden cleaned the oven with methanol again
and set the oven to 260 degC for 12 hours.
  
  18   Fri Jan 27 18:44:31 2023 Julian UpdateGeneralVacuum Chanmber CleaningI used the IPA wipes to wipe down the inside
of the chamber the best I could. I cleaned
the main chamber but not any of the connecting
  
  19   Fri Feb 3 13:04:04 2023 shaneSummaryGeneralclean room particle counts 1/25/23Clean room count graphs for each zone (as
of January 25, 2023) attached
 cleanroomcountsJan25.pdf 
  22   Mon Feb 6 20:02:32 2023 JulianUpdateGeneralCleanroom UpdateI wiped down the main table (including frame,
legs, and transparent shelf) and workbench
using alcohol wipes. Once I cleaned all of
  
  25   Fri Feb 10 15:15:30 2023 AidenUpdateGeneralBagging First BatchAiden Bagged and Tagged the first batch of
stainless steel parts shown on the google
spread sheet. 
1. Removed two parts from
  
  27   Sat Feb 11 00:17:27 2023 JulianUpdateGeneralVacuum Chamber CleaningToday I finished wiping down the rest of the
vacuum chamber, specifically focusing on
the connecting ports and outside surface
 20230210_181404.jpg20230210_181424.jpg20230210_181541.jpg20230210_181606.jpg 
  28   Sat Feb 11 17:09:29 2023 ShaneUpdateGeneralclean room particle counts 2/10/23Took a round of clean room counts after the
latest clean of vacuum chamber on Feb 10.
Used 60 second sample time, 5 samples for
 occupied2.10.23.pdfunoccupied2.10.23.pdfparticlecounts2.10.23.PDF 
  29   Mon Feb 13 18:57:53 2023 AidenSummaryGeneralClean and Bake batch 2Cleaned second batch of SS parts with liquinox
for 20 min. Then put in oven for 5 steps;
1. Ramp, 100 degC, 15 min 2. Const, 100 degC,
  
  30   Fri Feb 17 19:12:39 2023 AidenUpdateGeneralClean and Bake batch 3Bagged and Tagged batch 2 parts by placing
no more than two parts per ESD bag then taped
them with kapton tape and tagged them with
 IMG_4126.jpgIMG_4125.jpg 
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