• KAGRA
• Recovery2024
• EYC

EYC Recovery

• Suspension health check (Takahashi, Ushiba)
  • Recovery just after disasters:

    • https://klog.icrr.u-tokyo.ac.jp/osl/?r=28212,

  • Cable cut and repair

    • Recovery of BF damper: https://klog.icrr.u-tokyo.ac.jp/osl/?r=28640

    • treatment: https://klog.icrr.u-tokyo.ac.jp/osl/?r=29003

  • A01: Cable check
    • Photosensor:

      • Investigation and recovery: https://klog.icrr.u-tokyo.ac.jp/osl/?r=28765

      • Repair: https://klog.icrr.u-tokyo.ac.jp/osl/?r=28811

      • Glitches: https://klog.icrr.u-tokyo.ac.jp/osl/?r=28430, https://klog.icrr.u-tokyo.ac.jp/osl/?r=29753, https://klog.icrr.u-tokyo.ac.jp/osl/?r=29816

    • Cable replacement

      • ETMY MN LEN OpLev is very noisy: https://klog.icrr.u-tokyo.ac.jp/osl/?r=27776

    • Resistance/Inductance

      • BF LVDT: https://klog.icrr.u-tokyo.ac.jp/osl/?r=28550

      • F2 LVDT: https://klog.icrr.u-tokyo.ac.jp/osl/?r=29780

      • F2 GAS signal: https://klog.icrr.u-tokyo.ac.jp/osl/?r=29603, https://klog.icrr.u-tokyo.ac.jp/osl/?r=29622

      • LVDT coils for BF damper: https://klog.icrr.u-tokyo.ac.jp/osl/?r=29199

  • A02 Porality Check
  • A03 Rubbing Check

    • Investigation of BF horizontal actuator: https://klog.icrr.u-tokyo.ac.jp/osl/?r=29451

  • A04: Range and Calibration
  • A05: Watchdog Setting: Skip
  • A06: Height Measurement

    • https://klog.icrr.u-tokyo.ac.jp/osl/?r=29083

  • A08: Calibration:skip

  • A09: Spectrum(spectra of IM/MN photosensors.)

    • https://klog.icrr.u-tokyo.ac.jp/osl/?r=28430

    • ETMY F2 GAS signals got strange in this morning: https://klog.icrr.u-tokyo.ac.jp/osl/?r=29603

  • A10: Transfer Function

    • https://klog.icrr.u-tokyo.ac.jp/osl/?r=28430

  • A11: EQ stopper

    • check:https://klog.icrr.u-tokyo.ac.jp/osl/?r=29604

  • (A12: Inertial Damping)

    • https://klog.icrr.u-tokyo.ac.jp/osl/?r=29715, https://klog.icrr.u-tokyo.ac.jp/osl/?r=29750

• Oplev Check (Yokozawa, Akutsu)

  • Just after disasters: https://klog.icrr.u-tokyo.ac.jp/osl/?r=28216, https://klog.icrr.u-tokyo.ac.jp/osl/?r=28221, https://klog.icrr.u-tokyo.ac.jp/osl/?r=28246, https://klog.icrr.u-tokyo.ac.jp/osl/?r=28252

  • Check before closing: https://klog.icrr.u-tokyo.ac.jp/osl/?r=29206

• Green flash at REFL and Trans PD

  • Path finder: https://klog.icrr.u-tokyo.ac.jp/osl/?r=28861

  • Flash finder:https://klog.icrr.u-tokyo.ac.jp/osl/?r=29115

  • Flash check again before closing.
• Y-Pcal homework

  • Healthy just after disasters: https://klog.icrr.u-tokyo.ac.jp/osl/?r=28210

  • Oil pollution !!

  • Recovery including mirror cleaning: https://klog.icrr.u-tokyo.ac.jp/osl/?r=29738

  • Review document: https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=15844

• Windows Cleaning

  • https://klog.icrr.u-tokyo.ac.jp/osl/?r=28730

• Tcam (Yokozawa and ChenDan, and Yamamoto)

  • just after disaster: https://klog.icrr.u-tokyo.ac.jp/osl/?r=28410

  • maintenance: https://klog.icrr.u-tokyo.ac.jp/osl/?r=28642, https://klog.icrr.u-tokyo.ac.jp/osl/?r=28644

  • Cleaning: https://klog.icrr.u-tokyo.ac.jp/osl/?r=29213, https://klog.icrr.u-tokyo.ac.jp/osl/?r=29901

  • Reclaening ??

  • Image Analysis: https://klog.icrr.u-tokyo.ac.jp/osl/?r=29330

• TMSY optical system (Akutsu and his selected persons)
• Baffle PDs (Yokozawa and his selected persons):
  • not necessary.
• NAB, WAB (Akutsu)
  • NAB@EYA

    • Mechanically healthy: https://klog.icrr.u-tokyo.ac.jp/osl/?r=28997

    • Concerns: pollution with oil -> Noway to clean it, except for the suspension base-frame that was cleaned.

  • WAB@EYC

    • Mechanically healthy: https://klog.icrr.u-tokyo.ac.jp/osl/?r=28620

    • EY WAB restained and released: https://klog.icrr.u-tokyo.ac.jp/osl/?r=28620, https://klog.icrr.u-tokyo.ac.jp/osl/?r=28871

• Vacuum system (Kimura-san / Uchiyama-kun and their selected persons)
  • tie rod adjustment between EYC and TMSY to avoid stress when the only EYC side is pumped down.
  • Nasty air parts were replaced. -. Done
  • Vacuum alert recovery after pumping down.
  • GV interlock will be tried after pumping down.
  • Pumping down from EYA
• Cryo-system (Kimura-san and his selected persons)
  • All temp signals are obtained?
  • Connector change is required for the heat link suspensions.
  • Cryocon alert to slack after cooling.
  • No interlock for TMP around the Cryostat.