== Weekly PEM meeting ==
 * 2020/05/29(Fri) 16:00-(JST)
 * Regular meeting meeting (Japanese) 
 * Web meeting with Zoom2 ([[https://zoom.us/j/6676627462|Zoom2]])

 * member : Yokozawa, Washimi, Dan Chen, Kozakai, Ohkawa, Kume, Tomaru, Oshino, Fujikawa

==== Minutes ====

 * JPS meeting
  * Yokozawa will have a talk about PEM summary
  * deadline 6/4

 * 新学術地下宇宙 (6/2-4)
  * Online meeting [[https://www.lowbg.org/ugap/ws/am2020/index.html?LangP=JP&InputContents=Prog|web]]
  * Washimi has an invited talk on 6/3 [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=11716|slide]] (posted to the CPC)
  * Yokoyama-san also has a talk (not KAGRA?)
　
 * PEM meeting schedule
   * 16:00-17:00 Friday

　
 * Paper issues
  * KAGRA summary paper(Yokozawa) '''<<Almost DONE>>'''
  * Acoustic injection paper (Washimi) '''<<ON GOING>>'''
  * Portable PEMs (Yokozawa+)
   * Fix the contents and main result first
  * Ground motion paper (Yokozawa)
  * PEM summary note (Yokozawa+) '''<<ON GOING>>'''
  * Acoustic reverberation paper (Washimi+Virgo)
   * Start writing after the acoustic injection paper 
  * Magnetic field paper (Washimi+)
   * section
      1. Introduction
      2. 1-year Geomagnetism in underground
      3. 1-year Schumann resonance in underground
      4. Mag. field in EXC chamber
      5. Coherence between PRFPMI and MAGs
      6. Lightning effect on PRFPMI (3/22 event)
      7. Conclusion 
   * If rich contents, we should divide into several papers
   * Check the past schumann resonance paper

  * ICA analysis for E-run/O3GK (Kume, Yokoyama)
    * Start the code changing for the PEM injection data (before O3GK)
      * Is the time length (~100s) enough? 


 * for O3c
   * Ondotori maintenance
    * Change to AC adapta
    * Ask ondotori maker about the special power supply for KAGRA 
   * FFU operation & particle counter (if we open the OMC)
    * Ask Kokeyama-san about particle counter

 * for O4
   * cabling ([[https://github.com/gw-pem/kagra-pem/issues/204|github204]])
    * IOO circuit part was completed, need to enter the mine
    * We have to make cable diagram before ask Gyousya 
   * cosmic-ray/RI detector
    * ETが興味を持つ前にさっさと論文にするべき
    * 物品についてはSK, XMass, Kamlandに相談してみる。
    * fluxやdE/dxの観点から、宇宙線μよりもα線の方が影響が大きいか
     * 神岡鉱山はラドンの宝庫
     * 鏡の運動よりも、PDの空乏層の放射線損傷の方が効きそう
    * Investigate the effect of the radon to PDs and so on
     * 放射線耐性 -> 線源を買って加速試験
     * KAGRA坑内のflux -> プラスチックシンチレータなどで測定
     * 神田さんがプラシンで宇宙線の影響を調べている

  * Information from Tomaru-san
    * priorityはO4に置く O3cではなく。
    * OMCを開ける->リクエストを出す
    * 散乱光、IMC周りを開けた後ですぐに確認
    * ケーブルを抜いたりしたらノイズの振る舞いが変わる