• KAGRA
• Subgroups
• PEM
• Meeting
• 190702
• Minute

Minute of PEM meeting

• Date: 2019/7/2 17:00-18:00(JST)
• Attendance: Yokozawa, Washimi, TTanaka, Okawa, Fujikawa, Mori, Kozakai, Kaihotsu, Miyo, Oshino, Yamat

=== Agenda ===

• General issue
  • KAGRA interferometer status
    • PRC loss was large, birefringence effect?
    • FPMI or SRFPMI or DRFPMI
    • Open the CS area and remove the PRM and SRM?
    • Before that, we want to investigate the scattering effect at CS area
  • Chrome Book project
    • Portable PEM researcher
    • Spectral analyzer, sound recording, ...

    • USB accelerometer (Center area), microphone, ...

    • Data sharing GoogleDrive

  • Weekly PEM measurement
    • Friday is temporal weekly PEM measurement
    • Understanding the effect of the instruments and so on
    • Power supply
    • duct vibration
  • PEM DAQ sampling rate
    • Due to the limited DAQ power, almost all PEMs are taken at 2kHz sampling
    • Only PSL and CS microphone are taken with 16kHz sampling for the noise hunting
  • PEM injection
    • Shaker injection1 (Yikang, Yokozawa)
    • Shaker injection2 (Okutomi, Fabian)
    • acoustic injection (TTanaka)
    • magnetic field injection (Yikang, Yokozawa)
    • RF injection (TTanaka, Washimi)
  • 1st engineering run
    • 1st engineering run : Jun. 8th 12:00-18:00(JST) : Xarm cavity
  • Preparing toward the next engineering run
    • Next engineering run : 13th Jul.
    • Interferometer configuration ?
  • English meeting
    • We will have a monthly English meeting(Mainly share the information with Virgo people)
    • The third Tuesday of every month 17:00-(JST) 10:00-(CEST)

    • 2nd meeting will be held at 16th Jul.(Tue) 17:00-18:00 URL

  • Seismon issue
    • We already installed to KAGRA system
    • Need the tuning for the KAGRA
    • Large earthquake happened this month, we "should" be a safe mode before coming large earthquake (PEM issue???)
  • Task list toward the O3

    • task sheet

    • Please send e-mail to me if you have comments.
• each member progress
  • Yokozawa
    • Power supply issue
      • We started the investigation around the EX0 rack today.
      • With Pcal noise investigation
  • Washimi　
    • Others and plan toward the JPS meeting
      • Google chrome project
      • Accelerometer and microphone
      • They are very useful, especially potable feature is great.
      • Several spectral with short spectrogram was shown
  • Kozakai
    • Trigger event identification
      • Debugging now
      • Current a few days failed?
    • Yuzu summary page comments
    • Others and plan toward the JPS meeting
  • Miyo
    • Effect the protect shied to the seismometer

    • Long term study of the KAGRA ground motion Link

      • One year trend is now opened consistent with Sekiguchi-san. Time variance check.
      • 0.2Hz source dependence (0.15Hz??)
      • 1.2Hz came from the ikenoyama river, observed during bKAGRA phase1
      • Future issue is written in his github, welcome the comments
      • Future discussion towards the English meeting
  • Oshino
    • Weather station issue
      • Web page ready, pick up information by the k1script ready, remaining issue is making the epics channel and caput
  • TTanaka
    • Preparing for the PEM injection
      • Speaker will be arrived tomorrow
    • Microphone calibration
      • Check with the coherent and non-coherent component
    • Thesis agenda and plan toward the JPS meeting
      • JGW Doc
  • Okutomi
    • Shaker injection
  • Kaihotsu
    • Report about the KIW6
      • Questions
      • They will join to KAGRA PEM once of the every week (Friday?)
  • Yuzurihara
    • Yuzu summary page comments
  • etc
• github progress