ligo-ex ligo-ds
  Richardson Lab Experimental Log, Page 13 of 13  Not logged in ELOG logo
ID Date Author Type Categorydown Subject Text Attachments
  508   Mon Feb 3 13:17:21 2025 Xuesi MaUpdate  [Ma]
changed all zip ties to peek zip
ties, and grouped wires together. The setup
 20250203_123153.jpg20250203_123213.jpg 
  514   Tue Feb 18 10:01:07 2025 Xuesi MaUpdate  [Ma, Pooyan, Tyler]
On Friday, we connected the vacuum
chamber with the Cymac.
 IMG_7916.jpegIMG_7915.jpegIMG_7917.jpeg 
  515   Tue Feb 18 10:02:16 2025 Xuesi MaUpdate Group Meeting Slides 2/18/2025https://docs.google.com/presentation/d/1WiV2VqS0BzXNCK6VYYQ-Ty8xlHnzXatQaFbMf1-0rsY/edit?usp=sharing   
  525   Tue Feb 25 10:02:32 2025 Xuesi MaUpdate  1424039912.625576 2025/02/19 22:38:14 UTC Time
start
24V 2.8A right after start all 8
 resistance_vs_time_all_channels_all_time.pdftemperature_vs_time_all_channels_all_time.pdfresistance_vs_time_rise_time.pdfresistance_vs_time_fall_time.pdf 
  529   Tue Mar 4 03:33:18 2025 Xuesi MaUpdate UpdateSpikes Appear Again, need to address it
systematically.
Power on and off before reaching
 6x 
  539   Tue Mar 11 10:43:57 2025 Xuesi MaUpdate  Continue investigation in the spikes
Pulsed ADC with a function generator
and find no spikes. Rules out ADC for causing
 20250310_171936.jpg 
  544   Mon Mar 31 15:41:56 2025 Xuesi MaUpdate  The result from AI Chassis bypass test
showed that the AI Chassis may be the problem.
There are no spikes from DAC's direct output.
  
  545   Tue Apr 1 11:47:08 2025 LiuUpdate     Thermal_state_decoder_update.pdf 
  547   Mon Apr 7 13:28:49 2025 Xuesi MaUpdate  Test 1: Adapter Board Connected to Filter
Board

  Setup:
AI Chassis is powered on. Signal is measured
 20250403_151946.jpgELOG_Spike_adapter_filter_on.png20250404_143624.jpgELOG_Spike_adapter_isolate.png20250407_105846.jpg 
  553   Tue Apr 15 11:13:43 2025 Xuesi MaUpdate  Test 4: AI Chassis ground isolation


 Setup: AI Chassis isolated
from the ground with readout directly connected
 20250414_120428.jpg20250414_120423.jpg20250411_163105.jpg 
  559   Tue Apr 22 12:08:46 2025 Xuesi MaUpdate  Test 7: Reconnect ribbon cables


 Setup: Reconnect all
the ribbon cables, and turned on the AI Chassis
 20250415_161755.jpg20250416_174640.jpg20250422_105614.jpg 
  572   Tue May 6 13:19:31 2025 Xuesi MaUpdate     resistance_vs_time_RV_rise_time_24.pdfresistance_vs_time_all_channels_all_time_RV.pdf 
  576   Tue May 13 12:35:01 2025 Xuesi MaUpdate     resistance_vs_voltage_all.pdfresistance_vs_voltage_overlay.pdfresistance_vs_time_all_channels_all_time_RV.pdf 
  579   Mon May 19 10:59:14 2025 Xuesi MaInfrastructure  

  Status Update


 Previous Status:
  
  583   Tue May 27 12:52:22 2025 Xuesi MaUpdate  Using the configuration in section 2.11.1
in the Sorensen installation and operation
manual (attached below), I'm able to remote
 6x 
  586   Tue Jun 3 11:54:06 2025 Cece OchoaUpdate CE Cavity Design UpdateUpdate on the design for the CE Cavity Mirrors  CE_Arm_Cavity_.pdf 
  588   Tue Jun 3 13:08:47 2025 Xuesi MaUpdate  We currently have the parts for a DB9 connector
but need parts for a DB25 connector, where
did we get the parts for the DB9 connector?
 934.jpg933.jpg 
  589   Tue Jun 3 13:16:53 2025 Xuesi MaInfrastructure  
    Date and Time:
Around 3:50 PM on June 2, 2025
    Location and Temperature:
 928.jpg929.jpg931.jpg930.jpg932.jpg 
  591   Tue Jun 10 12:13:00 2025 Xuesi MaUpdate  
  By measuring the resistance of the
ladder, I obtained a graph of resistance
as a function of voltage.
 resistance_vs_voltage.pdfresistance_vs_voltage_element_5.pdfresistance_vs_time_all_channels_all_time_RV.pdf 
  594   Tue Jun 17 12:22:43 2025 Xuesi MaUpdate  



   
    
 12x 
  596   Tue Jun 24 11:50:15 2025 Xuesi MaUpdate  



   
    
 resistance_vs_time_all_channels_channel_switch.jpgresistance_vs_time_all_channels_channel_switch_one_cycle_before.jpgresistance_vs_time_all_channels_channel_switch_one_cycle_after.jpgresistance_vs_voltage.jpg 
  603   Tue Jul 1 13:41:36 2025 Xuesi MaUpdate  [Ma, Liu]
 Slides
  
  610   Mon Jul 14 23:50:22 2025 TylerUpdate Cymac ADC update I've been looking into the performances
of individual channels on the Cymac by computing
their individual PSDs and corresponding CSDs
 cymac_ADC_PSDs.pdfch35_ADC_comps.pdf 
  613   Tue Jul 15 11:47:53 2025 Xuesi MaInfrastructure  
    Date and Time:
Around 4:50 PM on July 1, 2025
    Location and Temperature:
 20250701_165118.jpg20250701_165200.jpg20250701_165329.jpg20250701_165246.jpg 
  620   Thu Jul 31 14:26:58 2025 Xuesi MaUpdate  [Tyler, Ma, Christina, Maple, Cece, Mary,
Pooyan, Audrey]
We started by cleaning outside of
 2025-08-07_cleanroom_chart.png 
  621   Tue Aug 5 11:25:17 2025 MaryUpdate point absorber and coated aperture in A#Simulating how point absorber defects on
Advanced LIGO mirrors affect cavity performance
by modeling a 4km LIGO-like arm cavity with
 point_absorber_A#.pdf 
  623   Wed Aug 6 16:31:37 2025 Xuesi MaUpdate  
    Date and Time:
Around 4:20 PM on Auguest 6, 2025
    Location and Temperature:
 941.jpg942.jpg943.jpg945.jpg946.jpg 
  626   Tue Aug 12 12:35:19 2025 TylerUpdate CyMAC ADC Update[Christina, Ma, Tyler]

 Updated CyMAC
measurement, comparing 260 hrs of measurement
time vs. 405 hrs.
 CSD_magnitude.pngchi_sq.png 
  629   Tue Aug 12 13:46:56 2025 ChristinaUpdate     3.png3-1.png 
  630   Tue Aug 12 13:49:24 2025 MaryUpdate point absorber and coated aperture in A#   Aug12.pdf 
  638   Tue Sep 2 12:34:02 2025 Xuesi MaUpdate Updata for self heating effect on HOMhttps://docs.google.com/presentation/d/19I1fx5BLEzYb4Qnc9P4rJnYAvWI8NqE2dsj9gSPyYzg/edit?usp=sharing   
  641   Tue Sep 9 12:01:38 2025 Tyler, MaUpdate  Slides   
  644   Tue Sep 9 13:08:44 2025 Xuesi MaUpdate  Slides   
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