• KAGRA
• Subgroups
• PEM
• Meeting
• 190625
• Minute

Minute of PEM meeting

• Date: 2019/6/25 17:00-18:00(JST)
• Attendance: Yokozawa, Kozakai, Mori, TTanaka, Kaihotsu, Somiya, Okawa, Fujikawa, Washimi, Oshino

=== Agenda ===

• General issue
  • Installation of the 1st PEM toward the O3 was (almost) completed!!
    • Center area, X end, Y end, weather station
    • Remaining : Magnetometer!!!
    • 2nd PEM installation will be started after the characterization of the chambers. (After O3??)

    • Washimi PEM webpage URL

    • PEM map provided by the medm was updated.
  • The power supply status measurements will be (re-)start soon
    • With the discussion with the Facility
  • Task list toward the O3

    • task sheet

    • Please send e-mail to me if you have comments.
  • Engineering run
    • 1st engineering run : Jun. 8th 12:00-18:00(JST) : Xarm cavity
    • What should we do toward the next engineering run
  • KIW6
    • Washimi-san and Kaihotsu-san presented
    • Currently, I heard that PEM activity is great! This is good news.
  • 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???)
  • Yuzu summary page was upgraded!
    • There will be a report in the each member progress
  • One student (Yikang) will come to KAGRA and work with PEM group
    • Last his visiting was cryo issue
    • Magnetometer and shaker injection (?)
• each member progress
  • Yokozawa
    • Coherent analysis during the engineering run
    • Bruco analysis
    • Origin of the vibration
  • Washimi　
    • KIW6 report
      • Status talk
      • Importance of the PEM injection

      • Suspect of the magnetic field requirement -> 勾配のほうだった

      • LIGOで静電場が問題になってきている。ポンプからの鉄カスなどが影響するかもしれない、caltechのabbottさんなど
    • New accelerometer
      • USB output accelerometer will be arrived at KAGRA (6/26)
      • Check the signal soon
    • plan for cryochamber characterization
      • Summary to the paper at August
      • Scheduling
    • Thunderbolt issue
      • Thunderbolt generated the magnetic field and observed by the magnetometer
      • No monitor tool in the weather station
  • Kozakai
    • Trigger rate analysis during engineering run
      • 6 segments with long lock
      • Trigger time

      • IMC PC was replaced before the engineering run -> IMC trigger 1min

      • Accelerometer trigger rate was not so changed between fan on and off.
      • No large SNR glitch for the important channel
      • Time different between previous trigger
        • random case : clean explanation plot
    • Collaboration with Yuzu summary page
      • Generate the help slide
  • Miyo
    • Effect the protect shied to the seismometer

    • Long term study of the KAGRA ground motion, Link

      • select 300 1h data from February
      • categorize good or bad
      • Bad is earthquake, daq troble , ...
      • 5% - 95%の範囲を示した。
      • 2-6月の静かな時、世界基準のLow modelと近い感じ
      • 関口さん@clio site : Lowとhighの間に位置している。
      • 月ごと、時間ごと
      • BLRMSの時間変化
      • 気象との相関、波や低気圧やいろいろ
  • Oshino
    • Weather station issue
  • TTanaka(may not attend this meeting)

    • Preparing for the PEM injection pdf

    • Microphone calibration
  • Okutomi
    • Shaker injection
  • Kaihotsu
    • Report about the KIW6
  • Yuzurihara
    • Yuzu summary page
  • etc
• github progress