== Weekly PEM meeting ==
 * 2020/09/11(Fri) 16:00-
 * Regular meeting
 * Zoom2 : https://zoom.us/j/6676627462

=== Agenda ===

==== After PEM meeting ====
 * Practice of Fujikawa-san presentation
 * Discussion about lock loss study

==== 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 (9/15 morning)
   * make presentation this weekend (Similar to F2F meeting)
 * KIW7 
  * The 7th KAGRA International Workshop (National Central U., Taiwan), Dec. 18-20, 2020  (F2F meeting on Dec. 17-18)
  * Yokozawa is supported by C2C program
  * If you have interested in, please contact to Yokozawa
　
==== General issue ====

 * Interferometer status
  * RSE lock trial
   * New suspension damping (modal damping)
   * The spectrum of the error signal of the ALS DARM was improved in higher frequency region
   * Now ASC control was implemented using TMS X/Y
    * Stable arm alignment
   * - 25th Sep.
  * Occasional day
   * 26th- Sep.
  * Preparation for O4 work

 * Working style (COVID-19 related)
  * Situation is unclear, I will explain in this meeting.
  * Some collaborator came to Kamioka. Please contact to Yokozawa if you plan to go to Kamioka.
   * Fujikawa-san is staying in Kamioka now

 * 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
  * Street view : [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=11806|Holobuilder]]

==== 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) [[https://docs.google.com/spreadsheets/d/1Lz5RNxdjOhdZp6CBef-USUUPmyNTrhww9a7u39W7PSI/edit?usp=sharing|Check list]], [[https://gokagra.slack.com/archives/C015M111B5G|slack]] '''<<Analysis ON GOING>>'''
   * Environmental part
      * Acoustic noise : Refer our PEM injection paper.
      * Seismic noise : summarise the actual seismic nois during O3GK? (who?)
      * OMC leg vibration : 12th - 16th Sep. ?
      * AC power lines : Coherence analysis is done ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=14848]], Washimi)
      * Magnetic noise : skipped in this paper?
      * Newtonian : seismic newtonian -> from PTEP1 (or Francisca?) / water fluid newtonian -> skipped / air density -> skipped 
   * Line noise investigation
      * violin mode : Details of the RMS value will be not discuss in PTEP2. 
  * PTEP (3) : CAL, DET, PEM, GIF (Yokozawa) '''<<Referee comments>>'''
  * Acoustic injection paper (Washimi) '''<<WRITING>>'''
  * ICA for E-run/O3GK (Kume, Yokoyama) '''<<Analysis ON GOING>>'''
  * Portable PEMs (Yokozawa+) '''<<Start investigation>>'''

==== Preparation for O4 ====
 
  * PEM tasks for O4 will be discussed after this meeting with SEO
   * GND issue 
   * Cabling issue

  * Temperature control

  * 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]])
      * Discussion with Furuta-san & a company is started
    * read out of the lightning sensor ([[https://github.com/gw-pem/kagra-pem/issues/182|github182]])
    * Infrasound monitor @ Atotsu, Mozumi, (+ Toyama?)
    * RF monitor
    * tiltmeter
    * RI detector
      * Rn : contact person -> Guillaume Pronostさん (ICRR, SK)
      * cosmic-ray : plastic scintillator?
      * gamma/neutron : 新学術地下宇宙
      * start from a geiger counter?
    * gravity gradient (Newtonian noise)
      * Superconducting Gravimeter
      * TOBA
  * PEM injection for O4
    * Large speaker @ End station
    * Magnetic injection by large coil 

==== Progress report ====
 
  * Washimi
   * Aacoustic injection paper [[https://www.overleaf.com/project/5f51878b1e41b00001893ac7|overleaf]]
     * Contact with Robert about LIGO PEM paper.
     * PRCL BPC lime subtraction : [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=14987|klog14987]]
   * Water fluid monitor [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=11949|JGW-T2011949]]
     * Waiting a reply from the company.
   * Lightning sensor
     * Frequent lightning in Japan ([[https://www.icrr.u-tokyo.ac.jp/~washimi/KAGRA/PEM/KamioKaminari/archives2020.html|KamioKaminari]])
     * read out of the lightning sensor ([[https://github.com/gw-pem/kagra-pem/issues/182|github182]])

  * Fujikawa
   * Lock loss study

  * Kume
   * ICA analysis -> suspended until JPS

  * Omicron and hveto study(Someone) 

==== Place for memo ====