ligo-ex ligo-ds
  Richardson Lab Experimental Log, Page 10 of 15  Not logged in ELOG logo
ID Date Authordown Type Category Subject Text Attachments
  460   Wed Oct 16 14:13:31 2024 LiuUpdate FROSTI with non uniform absorption scattering sourcesSlides   
  469   Wed Nov 6 13:48:55 2024 LiuUpdateInterferometer SimulationsQN modeling updateSlides   
  545   Tue Apr 1 11:47:08 2025 LiuUpdate     Thermal_state_decoder_update.pdf 
  549   Tue Apr 8 10:47:10 2025 LiuUpdateGeneralTest Mass Thermal State Decoder Update   Update.pdf 
  552   Tue Apr 15 11:09:37 2025 LiuUpdateFLIRTest Mass Thermal State Decoder Update with robustness study   Update.pdfUpdate.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
  
  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 
  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 
  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 
  640   Tue Sep 2 18:33:38 2025 LiuInfrastructureGeneralNew lab room 1125 layout and measurementAction items for facilities
 

Ceiling lights replacement
Fume
 1125.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 
  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 
  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 
  91   Wed May 3 19:03:47 2023 Julian,Pamella and CaoPhysicsVACModify vacuum asssembly and install RGA[Pamella, Julian, Cao]

   Today we
started re-configuring the vacuum chamber
components. 

 Particle count
 vaccum_chamber_re-configuration.jpg 
  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
  
  15   Wed Jan 18 22:06:05 2023 JulianUpdateELOGCleanroom UpdateI wiped down all the inner walls of the cleanroom
using alcohol wipes, as per Cao's instruction.
  
  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
  
  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 
  33   Thu Feb 23 21:12:33 2023 JulianUpdateGeneralVacuum Chamber CleaningToday I was able to come in and wipe down
both sides of the vacuum chamber lid using
the regular alcohol wipes and also wipes
 ChamberLid_inside.jpgChamberLid_outside.jpgVacuumChamber_inside.jpg 
  41   Thu Mar 2 20:53:56 2023 JulianUpdateGeneralCleanroom UpdateToday Pamella and Julian began the final cleaning
of the cleanroom, starting with the HEPA
vacuuming and mopping then wiping down every
  
  43   Sat Mar 4 00:34:46 2023 JulianUpdateGeneralCleanroom UpdateToday I was able to finish cleaning the frame
of the laser table, and for good measure
I wiped down the tabletop and exterior of
  
  55   Thu Mar 23 18:40:08 2023 JulianUpdateGeneralCleanroom UpdateToday Pamella and I came in to Hepa vacuum
and mop the floor of the cleanroom for general
maintenance. 
  
  726   Thu Jul 2 13:27:48 2026 Joshua MarmorUpdateGeneralHBT SURF Update #1Update on the progress for the HBT measurement.  group-meeting-july-2.pdf 
  731   Thu Jul 9 12:27:20 2026 Joshua MarmorUpdateGeneralWeek 2 HBT Surf ProjectSlides for group meeting, updates on HBT measurement  group-meeting-july-9.pdf 
  735   Wed Jul 15 21:53:32 2026 JoshuaInfrastructureCleanroomCleanroom cleaning[Joshua, Mary, Ma]

On Wednesday (7/15), a particle
count measurement was performed in the clean
 2026-07-20_11-22-54_cleanroom_chart.png 
  736   Thu Jul 16 10:29:19 2026 JoshuaUpdateGeneralHBT SURF Update #3

[Joshua, Mary, Ma, Abhi]




On Wednesday (7/15), the particle
count measurement was sufficient, so the
 IMG_8060.jpgIMG_8057.jpg 
  737   Thu Jul 16 10:52:02 2026 JoshuaUpdateGeneralHBT SURF Update #3 - group meeting slides   group-meeting-july-16.pdf 
  739   Tue Jul 21 15:47:55 2026 JoshuaUpdateGeneralHBT SURF Update #4 - Alignment & First Measurement
HBT Alignment & First Measurement




HBT
setup was aligned for maximum power on the
transmissive arm, then the beamsplitter was
  
  743   Thu Jul 30 14:15:52 2026 JoshuaUpdateGeneralHBT SURF Update #5 - Group Meeting SlidesAttached are my group meeting slides and some
calculations from Mary which predict the
photon bunching cross correlation signal.
 group-meeting-slides-july-30.pdfHBT_V2.pdf 
  746   Thu Aug 6 14:39:47 2026 JoshuaUpdateGeneralHeating Element Power Data

This is a measurement done to determine
which heating elements output the most power.
FROSTI was supplied 33V, and a photodetector
  
  90   Tue May 2 17:03:14 2023 Jon, CaoPhysicsVACFirst pump-down test of vacuum chamber [Jon, Cao] 

  1. Re-routing of cables 
 PXL_20230502_203343616.jpgPXL_20230502_210234897.MP.jpg 
  138   Thu Jun 29 18:27:26 2023 Jon, CaoInfrastructureVACVacuum bake attempt 3: success![Jon, Cao]


 Summary : We resolved
problems with heaters tripping power and
were able to proceed with chamber baking
 NewInsulation.pngBypassLineInsulation.jpg 
  265   Mon Nov 13 11:23:54 2023 Jon UpdateCDSCyMAC testing[Jon, Shane, Luis]
My repair of the internal ribbon
connecting the ADC to the adapter board resolved
 Cymac_GDS_Diagnostics.png 
  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
  
  3   Thu Jun 2 21:55:02 2022 JonUpdateCamerasFLIR Camera SetupThe new FLIR A70 infrared camera has arrived.
Tyler and I unpacked it in the lab yesterday.
In less than an hour, we succeeded in powering
 IMG_1473.pngIMG_1474.png 
  4   Fri Jun 3 13:03:33 2022 JonUpdateCamerasFLIR Camera SetupSummary
I have installed the
requisite software on chimay for interfacing
the FLIR A70 camera in Python. There are
  
  5   Mon Jun 6 17:11:48 2022 JonUpdateCamerasFLIR Camera SetupToday I tested the Spinnaker/PySpin software
installations (detailed in ELOG
#4) with the FLIR camera connected to
 IMG_1480.pngIMG_1481.png 
  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 
  13   Wed Dec 14 17:35:41 2022 JonInfrastructureComputersWindows LaptopI set up the new Windows 10 laptop (pictured
below), which arrived yesterday. This laptop
is intended to be used for running lightweight
 laptop.png 
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