== Weekly PEM meeting ==
 * 2020/10/02(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)
  * Maybe online style for Japanese member

 * (Next JPS meeting is also online-meeting)　

==== General issue ====

 * Interferometer status
  * RSE lock trial
   * Continued to 7th Oct. at maximum
   * New suspension damping (modal damping)
   * ALS DARM
   * More stable DRMI operation than before.

 * Interferometer schedule [[https://gwdoc.icrr.u-tokyo.ac.jp/DocDB/0120/G2012041/001/ChamberOpen-Schedule200925-2.pdf|JGW12041]]
  * - 12th Oct. RSE lock trial
  * 5th Oct. - 19th Oct. Start the cleaning
  * 15th Oct. - 21st Oct. Warming up cryogenic ducts(IX, IY, EY)
  * 14th Oct. blackout (13th, 15th working date for blackout)
  * 19th Oct. - 23rd Oct. Clean work by company
  * 22nd Oct. - 25th Oct. break vacuum
  * 26th Oct. - Open chambers

 * 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)

==== Discussion item ====

  * Some measurement if we can lock the DRFPMI
   * Acoustic injection with portable PEMs
   * Noise investigation

  * PEM measurement during blackout
   * Discussion in the report by Washimi [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=12095|JGW-G2012095]]
   * Prepare the DAQ during blackout
   * Seismometer + magnetometer + Infrasound microphone + GND
  
  * PEM DAQ racks
   * Use only IX and IY racks
   * Move the position of IX and IY racks

  * New PEMs toward O4
   * Many microphone
    * Not only tables but also booth
   * Position of magnetometer
   * Position of seismometer
   * Additional PEMs to PSL room
    * 120Hz noise
    * glitch study

  * Lock loss study
   * control loop of the ETMX MNR?

  * If you have new idea or discussion item, please write here


==== 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 
   *We will held a noise budget meeting to summarize the current status, before the starting of heavy mine work. Details will be announced by KYamamoto-san(ToyamaU) soon later.
  * 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, ...
   * IYC FFU glitch
   * Re-start the FFU on work after 7th Oct.

  * 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
    * meeting with company persons (2) : 10/7 13:00~
   * read out of the lightning sensor ([[https://github.com/gw-pem/kagra-pem/issues/182|github182]])
   * Infrasound monitor @ Atotsu, Mozumi, tunnel (+ Toyama?) 
     * if accepted
   * 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
  * Preparation for blackout [[https://github.com/gw-pem/kagra-pem/issues/214|GitHub214]]
  * Blasting at the atotsu area.  
  * FFU glitch discussion [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=15137|klog15137]]

 * Washimi
  * Aacoustic injection paper [[https://www.overleaf.com/project/5f51878b1e41b00001893ac7|overleaf]]
   * writing now (day by day)


 * Fujikawa
   * Lock loss study
   * Kamioka visiting plan

 * Kume
   * ICA analysis related with PEM


==== Place for memo ====