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  * Power outage 14th Oct.
   * Some measurement?

Weekly PEM meeting

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
      • Cleaning the PEMs
  • Working style (COVID-19 related)
    • Some collaborator came to Kamioka. Please contact to Yokozawa if you plan to go to Kamioka.
      • Fujikawa-san is staying in Kamioka now
  • KAKENHI proposal limit
    • Oct. 8 (NAOJ)
    • Mostly end of Oct.(4th week deadline) (ICRR)
    • Nov. 5 16:30 JST (JSPS final limit)

Jurnal paper issue

Details are here!

  • PTEP (2) : noise budget(K.Yamamoto) Check list, slack <<Analysis is ongoing>>

    • 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) <<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 : GoogleSpreadsheet

  • for O4 preparation
    • GND issue

      • We measured the potential difference for SRM and PR2 rack
        • Need the investigation more
    • water fluid (github207)

      • Discussion with Furuta-san & a company is started

        • When will company people come? -> Waiting a demonstration machine.

    • read out of the lightning sensor (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 overleaf

      • suspended due to writing KAKENHI <- finished

    • Lightning sensor
  • Fujikawa
    • Lock loss study
  • Kume
    • ICA analysis -> suspended until JPS

  • Omicron and hveto study(Someone)

Place for memo

KAGRA/Subgroups/PEM/Meeting/200925/Agenda (last edited 2020-09-25 16:25:19 by tatsuki.washimi)