== Weekly PEM meeting ==
 * 2020/06/26(Fri) 16:00- 
 * Regular meeting
 * Zoom2 : https://zoom.us/j/6676627462

=== Agenda ===

==== Conference issue ====

 * JPS meeting
  * Online meeting [[https://www.jps.or.jp/activities/meetings/autumn/autumn_index.php|web]]
  * Yokozawa will present about the PEM activity
 * KIW7 
  * The 7th KAGRA International Workshop (National Central U., Taiwan), Dec. 18-20, 2020  (F2F meeting on Dec. 17-18)
  * Yokozawa is supprted by C2C program
　
==== General issue ====

 * Interferometer status
  * Now interferometer is post-observation
   * It may continue to end of June
   * Request 1 day for PEM injection
   * IMC scattered light check by GigE camera (6/30 Kokeyama, Yokozawa)
   * Check the OMC leg vibration
   * 6/25 early morning PRFPMI lock with better alignment -> If you interested in, you can use data
  * Earthquakes at Hida area is serious
   * Frequency was reduced
   * Earthquake in Japan is frequent, suspension master guardian worked well
  * Schedule for O4 will be discuss later

 * Tasks for post-commissioning
  * Acoustic injection 
   * 6/5     : Day 1 : For only REFL (remote work) -> study of nonlinearity & up/down conversion -> DAQ trouble
   * 6/11    : Day 2 : re-measurement of Day 1 (REFL) + PSL
   * Unclear : Day 3 : BS, SR, ITMX  '''<<Before DRFPMI study (Jul.)>>'''
  * Scattered light
   * One of the hammering test (lower priority, open the chamber and check)
   * OMC chamber vibration RMS (lower priority, open the chamber and check)
   * IMC scattered light by GigE camera (Explained avobe)
  * Line noise investigation by PEM
   * No action from DAC, SEO and noise budget team. Maybe skipped.

 * Working style (COVID-19 related)
  * --( From July, (If U-tokyo level became 0.5) we can work as usual(maybe), if you have a plan to visit KAGRA site, please contact to Yokozawa first )--
  * Situation is unclear, I will explain in this meeting.

 * Useful management tools
  * Easy communication : Slack
   * We want to start using the slack by communication. I will send the message to candidate
  * Task management : GitHub
  * Software management : GitHub
  * Papers : Overleaf

==== Jurnal paper issue ====
[[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Subgroups/PEM/Reports/JurnalPaperIssue|Details are here!]]
  * PTEP (2) : noise budget(K.Yamamoto)
   * Start investigation (?)
  * PTEP (3) : CAL, DET, PEM, GIF (Yokozawa) '''<<Submitted to CPC>>'''
  * Acoustic injection paper (Washimi) '''<<Analysis ON GOING>>'''
  * ICA for E-run/O3GK (Kume, Yokoyama) '''<<Analysis ON GOING>>'''
  * Portable PEMs (Yokozawa+) '''<<Start investigation>>'''
   * Target journal->to be discussed later (PTEP?)
   * Study of the new environmental noise investigation technique using the portable monitors and Chromebook(仮)
   * section
      1. Introduction
      2. Environmental noise
      4. Portable PEM2 : Chromebook type
       4.1 USB type PEMs <<BR>>
       4.2 Combination with Chromebook and USB tpye PEMs <<BR>>
       4.3 Recording system and offline analysis <<BR>>
       4.4 Vibration injection
      5. Examples of noise investigation
       5.1 44Hz vibration noise <<BR>>
       5.2 Sound and vibration from air conditioner and FFU <<BR>>
       5.3 Oshino-san, Shimode-san magnetic field with circuit  <<BR>>
       5.4 Noise investigation at OMC chamber 
      6. Conclusion 
  * Acoustic reverberation paper (Washimi+Virgo) '''<<PLAN>>'''
  * Magnetic field paper (Washimi+) '''<<PLAN>>'''
  * Ground motion paper (Yokozawa+) '''<<PLAN>>'''
  * PEM summary note (Yokozawa+) '''<<PLAN>>'''
  * Other topics
   * If you have interested in, please contact to Yokozawa and Washimi first
   * We took many environmental data
    * Six Seismometer(Miyo+)
    * Many microphones and accelerometers(Yokozawa+)
    * Weather vs environment
    * Temperature vs suspension
    * Earthquake vs magnetic-field
      * e.g. [[https://ci.nii.ac.jp/naid/110003828999]]
    * Non linearity noise study
    * Line noise investigation(Yokozawa+)


==== Preparation for O3c / O4 ====

  * for O3c
    * Maybe, we don't need to discuss about O3c

  * Schedule for O4
   * Expanded style chief meeting was held in 6/15
    * Jul. - Aug. DRFPMI lock trial
     * Apply sensor correction to SR suspensions
    * After them, we will start the upgrading tasks
   * PEM tasks for O4 will be discussed after this meeting with SEO
    * GND issue 
    * Cabling issue
    * New PEM(?)
 
  * for O4 preparation
    * [[KAGRA/Subgroups/PEM/GNDmeeting|GND issue]]
     * We found new ground in the center area
     * We started the rack design with AEL people
    * cabling ([[https://github.com/gw-pem/kagra-pem/issues/204|github204]])
    * ondotori ([[https://github.com/gw-pem/kagra-pem/issues/205|github205]])
    * water fluid ([[https://github.com/gw-pem/kagra-pem/issues/207|github207]])
    * read out of the lightning sensor ([[https://github.com/gw-pem/kagra-pem/issues/182|github182]])
    * RF monitor
    * tiltmeter
    * RI detector
      * Rn : contact person -> Guillaume Pronostさん (ICRR, SK)
      * cosmic-ray : plastic scintillator?
      * gamma/neutron : chikauchu
    * gravity gradient (Newtonian noise)
      * Superconducting Gravimeter
      * TOBA

==== Analysis report ====

  * Yokozawa
   * Study of the 116 Hz acoustic injection to REFL table

  * Washimi
   * Progress of the acoustic injection analysis [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=11777|JGW-G2011777]]

  * Fujikawa
   * Lock loss study

  * Progress of the ICA analysis

  * Omicron and hveto study(Someone) 

==== Place for memo ====