ligo-ex ligo-ds
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ID Date Author Type Category Subject Text Attachments
  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
  
  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,
  
  737   Thu Jul 16 10:52:02 2026 JoshuaUpdateGeneralHBT SURF Update #3 - group meeting slides   group-meeting-july-16.pdf 
  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 
  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 
  734   Tue Jul 14 21:23:40 2026 XuesiInfrastructureCleanroomCleanroom cleaning[Joshua, Cece, Ma, Mary, Abhi, Jacob, Dhatri]

The clean room (1119) was re-cleaned
on Tuesday (7/14). A particle count measurement
 2026-07-14_21-08-30_cleanroom_chart.png 
  733   Thu Jul 9 13:35:08 2026 MaryUpdateInterferometer Simulations    gt_Current_gt1_landscape.pnggt_Current_gt1_2d.png 
  732   Thu Jul 9 12:46:49 2026 Xuesi MaInfrastructureCleanroomCleanroom cleaning[Shane, Joshua, Cece, Ma, Mary, Abhi, Jacob]

The clean room (1119) was re-cleaned
on Tuesday (7/7). All surfaces were wiped
 2026-07-09_12-40-56_cleanroom_chart.png 
  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 
  730   Thu Jul 9 12:13:02 2026 Abhiram SharmaUpdateInterferometer Simulations Update on MCMC SURF project  Week_2_-_Group_Meeting_Update_Abhi.pdf 
  729   Tue Jul 7 13:54:37 2026 Xuesi MaInfrastructureCleanroom [Shane, Joshua, Cece, Ma, Mary, Abhi, Jacob]

The clean room (1119) was re-cleaned
on Thursday (7/2). All surfaces were wiped
 IMG_20260707_133309.png2026-07-07_13-5-50_cleanroom_chart.png 
  728   Mon Jul 6 18:25:26 2026 shaneUpdateInventoryCleaning/PPE inventory


The cleaning
supply/PPE inventory has now been fully updated
and the spreadsheet can be viewed here.
  
  727   Thu Jul 2 14:46:19 2026 XuesiUpdate FROSTI Reflector DesignUpdate on the FROSTI reflector design
slides
  
  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 
  725   Thu Jul 2 13:26:16 2026 Abhiram SharmaUpdateInterferometer Simulations Update on MCMC SURF project  Week_1.pdf 
  724   Thu Jul 2 11:09:09 2026 Cece OchoaUpdateInventoryPPE/Cleaning Supplies Inventory[Shane, Cece]

Shane has made a Google Form
to take inventory of  PPE
and cleaning supplies.

Additionally,
  
  723   Thu Jun 25 13:45:11 2026 CynthiaUpdateInterferometer SimulationsPoster Drafthttps://docs.google.com/presentation/d/1tpYjs-gOfZgFFkffU0kv7rYKHu0xtfPyMZqF1qXHIOQ/edit?usp=sharing   
  722   Thu Jun 25 13:21:31 2026 CeceUpdateInventoryOptics Inventory Update[Shane, Ma, Cece]

Updated optics inventory here.

Changes made: removed thrown out optics
  
  721   Thu Jun 25 12:48:29 2026 Xuesi MaInfrastructureCleanroom    3981.jpg3982.jpg 
  720   Thu Jun 25 11:42:29 2026 MaryUpdateTCSBeam position optimization algorithm
Weight Calibration:
this study looks at how the thermal-compensation
  
  719   Thu Jun 18 12:36:46 2026 MaryUpdate Beam position optimization algorithmSlides   
  718   Thu Jun 18 08:40:07 2026 MaryInfrastructureGeneralFume hood[Ma, Mary]


The tape residue on the fume hood
was cleaned using acetone; however, the acetone
 Fume_hood.pdf 
  717   Mon Jun 15 22:30:09 2026 Cece OchoaInfrastructureInventoryOptics Inventory Spreadsheet of all tabletop optical parts
in 1129 (Cabinet 1) 
linked here
 
Note that a couple
 Optics_Inventory_(1).xlsxOptics_Inventory_-_Sheet1.pdf 
  716   Thu Jun 4 13:30:46 2026 CynthiaUpdateInterferometer SimulationsO5 Test mass Presentation   Nonspherical_polishing_profile_design_recommendation.pdf 
  715   Thu Jun 4 11:21:29 2026 MaryUpdateVACVacuum designhttps://autode.sk/43S0ZbK  Convection.pngVC_Design_-_06-04-2026.pdf 
  714   Thu May 28 12:54:38 2026 CynthiaUpdateInterferometer SimulationsO5 Test mass    5_28_update_(1).pdf 
  713   Thu May 14 13:42:57 2026 CynthiaUpdateInterferometer Simulationsless-roll-off coating    e6caa8cf-2a96-49d8-a8b7-b84feab55404.png 
  712   Thu May 14 12:37:17 2026 CynthiaUpdateMeasuring Noise in InterferometerO5 Test mass design   update_5_13.pdf 
  711   Thu May 7 13:35:14 2026 CynthiaUpdateInterferometer SimulationsO5 Test mass    Screenshot_2026-05-07_133453.png 
  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 
  709   Tue May 5 12:58:53 2026 TylerUpdateTCSFROSTI A# Profiles 05/07/2026 Group MeetingSlides
detailing the incorporation of minimizing
curvature overlap between FROSTI and ring
  
  708   Sun May 3 21:13:14 2026 PooyanInfrastructureCleanroomCleanroom HEPA fan install[Ma, Cece, Pooyan, Tyler]
We installed the repaired HEPA fans
on top of the cleanroom, and cleaned the
 1119.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 
  706   Thu Apr 30 12:52:26 2026 MaryUpdateInterferometer SimulationsFull interferometer simulation   Full_interferometer.pdf 
  705   Thu Apr 30 12:08:02 2026 MaryUpdateVACNew Vacuum designhttps://autode.sk/3QFUGF8   
  704   Fri Apr 24 23:55:50 2026 DhatriSummaryInterferometer Simulations   [Sidd, Pooyan, Dhatri]  In the group meeting on 04/23/26, we   
  703   Thu Apr 23 12:47:05 2026 CynthiaUpdateInterferometer SimulationsO5 Test mass    4_23_26.pdf 
  702   Thu Apr 23 11:32:48 2026 Cece OchoaUpdateInterferometer SimulationsCE Cavity Design UpdateUpdate on CE Mirror RoC, simulation with FROSTI
and cavity locking

View Presentation
  
  701   Sun Apr 19 15:22:08 2026 PooyanInfrastructureCleanroomHEPA fan air flow measurment[Ma, Mary, Tyler, Pooyan]
HEPA fan air flow measurements are
done with the fans sitting on their side
  
  700   Thu Apr 16 14:04:46 2026 MaryUpdateInterferometer SimulationsBeam position optimization algorithm   beam_position_optimization.pdf 
  699   Thu Apr 16 13:14:42 2026 TylerUpdateTCSA# FROSTI Profiles Optimization 04/02/2026

Slides
discussing including overlapped irradiance
profiles at the center of an A# ITM.


  
  698   Thu Apr 16 12:53:30 2026 CynthiaUpdateInterferometer SimulationsO5 Test mass    4_16_update.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   
  696   Thu Apr 9 12:40:24 2026 Xuesi MaUpdateTCSA# Ring Heater Design
Slides
discussing for A# Ring Heater design.
  
  695   Thu Apr 2 12:23:40 2026 MichaelUpdateInterferometer SimulationsUpdate Plots and Squeezing Behavior With Toroidal Mirrors   Update_4-2-26.pdf 
  694   Wed Apr 1 15:02:30 2026 TylerUpdateTCSA# FROSTI Profiles Optimization 04/02/2026
Slides
discussing SURF, OPD, and SURF+OPD optimizations
for idealized FROSTI A# profiles.


  
  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.
  
  692   Thu Mar 12 12:48:58 2026 CynthiaUpdateInterferometer SimulationsNew Result of point absorber+miscentering   Untitled_presentation_(1).pdf 
  691   Wed Mar 11 19:38:21 2026 PooyanInfrastructureCleanroomParts and things to get after the cleanroom move
concrete Caulk to fill the drill
holes in 1119

Example [Pooyan:
I have a caulk gun and silicon caulk at home,
 8x 
  690   Thu Mar 5 13:01:14 2026 TylerUpdateTCSA# FROSTI Profiles Optimization
Slides
discussing updates on FROSTI A# profile optimizations.
In particular, a new RMS function is defined
  
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