• KAGRA
• Subgroups
• PEM
• Meeting
• 200114
• Agenda

Weekly PEM meeting

• 2020/01/14(Tue) 16:00-(JST)
• Regular meeting meeting (Japanese)

• Web meeting with Zoom2 (Zoom2)

Agenda

General issue

• Interferometer status
  • December 17-24 24h engineering run

    • wiki

    • We also held the post ER. We turned off the FFUs and vacuum pumps
  • Lock acquisition to PRFPMI
  • There is still some peaks in the lower frequency

    • Type-A resonant frequency JGWDoc11116

  • Peaks appeared at higher frequency
    • PEM injection to REFL table
  • After that, we will move to noise hunting

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

• PEM plan January
  • Identification of the ~100Hz noise source
    • (Maybe, ) the dominant noise for lower frequency may come from suspension
  • After the success of the PRFPMI (or chance to operate the FPMI), we would like to do following things
    • Understanding the coupling function detected at the refl table
      • At the some point, we detected the larger coupling function
      • Periscope or some optics?
  • We would like to inject sound or vibration to AS, POP and TMS table
  • Long term PEM evaluation
• PEM festival
  • 01/14(Tue) 9:00-15:00

    • Evaluate the scattered light for payload (with CRY team) http://klog.icrr.u-tokyo.ac.jp/osl/?r=12293

  • 01/15(Wed) (Maybe expanded)
    • Turned off almost all FFUs and vacuum pumps
• Conference

  • 地下宇宙若手研究会@茂住 (2/22-24)

  • JPS (2020/3/16-19 @ Nagoya)
    • Yokozawa, TTanaka
  • KIW7
• PEM injection
  • Shaker injection1 (TTanaka, Yokozawa)
  • acoustic injection (TTanaka, Yokozawa)
    • PSL, REFL and AS table injection
    • Analysis is ongoing
  • magnetic field injection (Niigata Tanaka, Fujikawa, Yokozawa)
    • Effect of the air cooler magnetic field
    • AS, REFL table injection
    • He is writing the thesis
• Newtonian noise measurement
  • Thank you for Virgo PEM member!
  • Francesca mainly measured the newtonian noise
  • We will discuss in 21st. Jan.(Virgo KAGRA PEM meeting)
• PEM measurement
  • Someday : Effect of the sound to DARM displacement
  • Someday : Environmental check around BS (including the POP)
  • Someday : Evaluation of the table cover
  • Someday : SR2 and SR3 optical lever (Reflection light from SRM?)

Each progress

• Yokozawa
  • Planning toward the O3 run
• Washimi

  • Preparation for the hammering test @ Y-end klog

  • Sound reverberation study (KAGRA & Virgo)

• Kozakai
  • Offline detchar report for the part of the PEM
• TTanaka(ICRR)

  • shaker injection with FPMIspeaker@12/8,shaker@12/15

  • Master thesisthesis

• Fujikawa
  • Lock loss study2
  • fujimopy
• TTanaka(Niigata)
  • Magnetic field from air cooler and compressor
  • Magnetic field injection to AS and REFL table
• etc