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Entry  Mon Jul 26 01:30:42 2021, Koji, Summary, Cryo vacuum chamber, Prep for the 2nd cooling of the suspension 
    Reply  Mon Jul 26 22:49:00 2021, Koji, Summary, Cryo vacuum chamber, Aquadag painting 10x
       Reply  Wed Jul 28 00:59:47 2021, Koji, Summary, Cryo vacuum chamber, The test mass successfully suspended P_20210727_154143.jpegP_20210727_190356.jpegP_20210727_190426.jpegP_20210727_190543.jpeg
          Reply  Thu Jul 29 00:42:38 2021, Koji, Summary, Cryo vacuum chamber, The test mass successfully suspended 
             Reply  Thu Jul 29 13:11:17 2021, Koji, Summary, Cryo vacuum chamber, Cooling progress: Update temp_log_cool_down_20210728_1830.pdfcooling_model1.pdfcooling_model2.pdfOSEM_cooling.pdf
                Reply  Fri Jul 30 12:22:56 2021, Koji, Summary, Cryo vacuum chamber, Cooling curve comparisons comparison_cold_head.pdfcomparison_inner_shield.pdfcomparison_test_mass.pdf
                   Reply  Sun Aug 1 22:22:00 2021, Koji, Summary, Cryo vacuum chamber, Cooling update temp_log_cool_down_20210728_1830.pdfcooling_meas.pdfOSEM_cooling.pdfcooldown_210728.zip
                      Reply  Mon Aug 2 13:25:32 2021, Stephen, DailyProgress, Cryo vacuum chamber, Warmup started 02 August 
                         Reply  Tue Aug 3 23:56:00 2021, Koji, DailyProgress, Cryo vacuum chamber, Warmup started 02 August P_20210804_000247.jpgP_20210803_235421.jpg
Message ID: 2618     Entry time: Mon Jul 26 01:30:42 2021     Reply to this: 2619
Author: Koji 
Type: Summary 
Category: Cryo vacuum chamber 
Subject: Prep for the 2nd cooling of the suspension 

Updated Jul 26, 2022 - 22:00

 

  1. Reconstruct the cryostat
    1. [Done] Reinstall the cryo shields and the table (Better conductivity between the inner shield and the table)
    2. [Done] Reattach the RTDs (Inner Shield, Outer Shield)
      -> It'd be nice to have intermediate connectors (how about MIllMax spring loaded connectors? https://www.mill-max.com/)
    3. Reattach the RTD for the test mass
  2. Test mass & Suspension
    1. [Done] Test mass Aquadag painting (How messy is it? Is removal easy? All the surface? [QIL ELOG 2619]
    2. [Done] Suspension geometry change (Higher clamping point / narrower loop distance / narrower top wire clamp distance -> Lower Pend/Yaw/Pitch resonant freq)
    3. [Done] Setting up the suspension wires [QIL ELOG 2620]
    4. [Done] Suspend the mass
  3. Electronics (KA)
    1. [Done] Coil Driver / Sat Amp (Power Cable / Signal Cables)
    2. Circuit TF / Current Mon
    3. [Done] DAC wiring
    4. [Done] Damping loop
  4. Sensors & Calibration (KA)
    1. [Done] Check OSEM function
    2. [Done] Check Oplev again
    3. Check Oplev calibration
    4. [Done] Check Coil calibration
    5. Use of lens to increase the oplev range
    6. Recalibrate the oplev
  5. DAQ setup (KA)
    1. [Done] For continuous monitoring of OSEM/OPLEV
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