Weekly PEM meeting

• 2020/01/28(Tue) 16:00-(JST)
• Regular meeting meeting (Japanese)

• Web meeting with Zoom2 (Zoom2)

Agenda

General issue

• Interferometer status
  • Finally, we can lock the PRFPMI
    • Transmittance laser power became 100 times higher than FPMI
    • Lock duration is about 30min at maximum
  • OMC commissioning is also ongoing

  • ~100Hz noise and line noise of the higher frequency -> PEM

• New PEMs
  • We bought the ACO power supply, microphone and accelerometers(end of Feb.)
  • Basically the portable PEMs
• PEM plan
  • PEM injection
    • Shaker injection (TTanaka, Yokozawa)
    • Acoustic injection (TTanaka, Yokozawa)

      • PSL, REFL and AS table injection (Defence of TT Thesis -> tomorrow)

    • magnetic field injection (Niigata TTanaka, Fujikawa, Yokozawa)
      • Effect of the air cooler magnetic field
      • AS, REFL table injection
      • He is writing the thesis
  • Hammering test
  • Long term PEM evaluation
  • Turning off the instruments
  • Many microphone in the PSL room
• Conference

  • 地下宇宙若手研究会@茂住 (2/22-24)

  • JPS (2020/3/16-19 @ Nagoya)
    • Yokozawa, TTanaka
  • KIW7

Each progress

• Yokozawa
  • Planning toward the O3 run
  • IX. IY microphone
  • Instrument switch off
• Washimi

  • Preparation for the hammering test @ Y-end 200121/Minute

  • Noise around 100Hz klog12629

  • Portable PEM with DataLogger GutHub201

  • PEM chassis JGW-T2011425

• Kozakai
  • Coupling with calibration line
• TTanaka(ICRR)
  • shaker injection with FPMI
• Fujikawa
  • Lock loss study
• TTanaka(Niigata)
  • Magnetic field from air cooler and compressor
  • Magnetic field injection to AS and REFL table
• etc