== Weekly PEM meeting ==
 * 2020/09/25(Fri) 17:00-
 * Regular meeting
 * Zoom2 : https://zoom.us/j/6676627462

=== Agenda ===

==== Conference issue ====
  
 * 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

 * (Next JPS meeting is also online-meeting)　

==== General issue ====

 * Interferometer status
  * RSE lock trial
   * Continued to 30th Sep.
   * New suspension damping (modal damping)
   * ALS DARM and Find IR resonance
   * PRCL, SRCL control
  * Power outage 14th Oct.
   * Some measurement?

 * Preparation for O4 work
  * Toward opening the chamber
   * FFU on with temperature control
  * Help the VIS cleaning [[https://www.dropbox.com/s/fxeig8e8aicjnc4/Booth%20cleaning.pdf?dl=0|Schedule]]
   * Cleaning the PEMs  

 * Working style (COVID-19 related)
  * Some collaborator came to Kamioka. Please contact to Yokozawa if you plan to go to Kamioka.

 * KAKENHI proposal limit
  * NAOJ : Oct. 8
  * ICRR : Mostly end of Oct.(4th week deadline)
  * JSPS : Nov. 5 16:30 JST (final limit)

==== 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 is ongoing>>'''
   * Environmental part
      * Acoustic noise : Refer our PEM injection paper.
        * We can discuss whether we use [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=15103|the result of pre-O3 study]] for the noise budget 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) '''<<Submitted>>'''
  * 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
   * Cleaning the center area

  * Temperature control
   * Cooler ON, compressor ON, FFU ON, ...

  * PEM Rack arrange
   * There are discussion about DAQ of the KAGRA PEM channels. PEM channels may be assigned in the IX0 and IY0 racks.
    * Less effect from other models(less data loss)
    * Change the place of the IX0 and IY0 rack (next to MCF and BS chamber?)
    * plan : [[https://docs.google.com/spreadsheets/d/1OHBOrNFt_Fpre-T-oSCkupGevc976d8T2PI9TVS_6pI/edit?usp=sharing|GoogleSpreadsheet]]

  * for O4 preparation
   * [[KAGRA/Subgroups/PEM/GNDmeeting|GND issue]]
    * We measured the potential difference for SRM and PR2 rack
     * Need the investigation more
   * water fluid ([[https://github.com/gw-pem/kagra-pem/issues/207|github207]])
    * Discussion with Furuta-san & a company is started
     * When will company people come? ->    Waiting a demonstration machine.
   * read out of the lightning sensor ([[https://github.com/gw-pem/kagra-pem/issues/182|github182]])
   * Infrasound monitor @ Atotsu, Mozumi, (+ Toyama?) 
   * PEM injection for O4
     * Large speaker @ End station
     * Magnetic injection by large coil 

 * After O4 
   * 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?
   * Newtonian noise
    * Accelerometer for wall
    * Relative temperature monitor
    * Many seismometers
    * Superconducting Gravimeter
    * TOBA

==== Progress report ====
 * Yokozawa
  * Potential difference measurement at SRM and PR2 racks 
 * Washimi
  * Aacoustic injection paper [[https://www.overleaf.com/project/5f51878b1e41b00001893ac7|overleaf]]
   * suspended due to writing KAKENHI <- finished 
  * 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
   * Kamioka visiting plan

 * Kume
   * ICA analysis -> suspended until JPS

 * Omicron and hveto study(Someone) 

==== Place for memo ====