= 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 [[https://www.icrr.u-tokyo.ac.jp/~washimi/KAGRA/PEM/PEMmap/|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
   * [[https://docs.google.com/spreadsheets/d/1DSltWg18KrwnfkVJmSm09TkQ82aQ5lHAdaC9uCozGC0/edit#gid=1072504162|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 [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Subgroups/PEM/Meeting/190716/Agenda|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, [[https://github.com/MiyoKouseki/kagra-gif/issues/89|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  [[attachment:meeting190625.pdf|pdf]]
   * Microphone calibration
  * Okutomi
   * Shaker injection
  * Kaihotsu  
   * Report about the KIW6
  * Yuzurihara
   * Yuzu summary page
  * etc

 * github progress