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
• 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)
  • ? (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.

      • We can discuss whether we use 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 : 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

    • Frequent lightning in Japan (KamioKaminari)

    • read out of the lightning sensor (github182)

• Fujikawa
  • Lock loss study
• Kume

  • ICA analysis -> suspended until JPS

• Omicron and hveto study(Someone)

Place for memo