• KAGRA
• Recovery2024
• IYC

IYC Recovery(20240407)

• Suspension health check (Takahashi, Ushiba)
  • A01: Cable check
    • Re-cabling of BF damper

    • https://klog.icrr.u-tokyo.ac.jp/osl/?r=28993

    • https://klog.icrr.u-tokyo.ac.jp/osl/?r=29177

  • A02 Porality Check
    • Magnet gluing

    • https://klog.icrr.u-tokyo.ac.jp/osl/?r=28831

  • A03 Rubbing Check
    • judge by the transfer functions
  • A04: Range and Calibration
  • A05: Watchdog Setting: Skip
  • A06: Height Measurement

    • https://klog.icrr.u-tokyo.ac.jp/osl/?r=29064

  • A08: Calibration:skip

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

    • ITMY IM/MN photosensors: https://klog.icrr.u-tokyo.ac.jp/osl/?r=29140

    • ITMY tower sensor: https://klog.icrr.u-tokyo.ac.jp/osl/?r=29141 -> moving peaks exist, but amplitudes are not so high and frequency is far from controls. Some bumps or moving peaks exist. 3rd graph shows it can be removed when evacuated.

  • A10: Transfer Function

    • Transsfer function : https://klog.icrr.u-tokyo.ac.jp/osl/?r=29138

    • EQ stop: https://klog.icrr.u-tokyo.ac.jp/osl/?r=29087

• Oplev Check (Yokozawa, Akutsu)

  • path check: https://klog.icrr.u-tokyo.ac.jp/osl/?r=29098

• Green flash at REFL and Trans PD
• Windows Cleaning

  • https://klog.icrr.u-tokyo.ac.jp/osl/?r=29128

• Tcam (Yokozawa and ChenDan, and Yamamoto)
• Baffle PDs (Yokozawa and his selected persons):
• NAB, WAB (Akutsu)

  • NAB: https://klog.icrr.u-tokyo.ac.jp/osl/?r=28998

  • WAB: https://klog.icrr.u-tokyo.ac.jp/osl/?r=28984

• Vacuum system (Kimura-san / Uchiyama-kun and their selected persons)
  • Nasty air parts were replaced.
  • Vacuum alert recovery after pumping down.
  • GV interlock will be tried after pumping down.
  • N2 purge is necessary for IYV.
• Cryo-system (Kimura-san and his selected persons)
  • All temp signals are obtained?
  • Cryocon alert to slack after cooling.
  • No interlock for TMP around the Cryostat.