Weekly PEM meeting

• 2020/06/26(Fri) 16:00-
• Regular meeting

• Zoom2 : https://zoom.us/j/6676627462

Agenda

Conference issue

• JPS meeting

  • Online meeting web

  • Yokozawa will present about the PEM activity
• KIW7
  • The 7th KAGRA International Workshop (National Central U., Taiwan), Dec. 18-20, 2020 (F2F meeting on Dec. 17-18)
  • Yokozawa is supprted by C2C program

General issue

• Interferometer status
  • Now interferometer is post-observation
    • It may continue to end of June
    • Request 1 day for PEM injection
    • IMC scattered light check by GigE camera (6/30 Kokeyama, Yokozawa)
    • Check the OMC leg vibration

    • 6/25 early morning PRFPMI lock with better alignment -> If you interested in, you can use data

  • Earthquakes at Hida area is serious
    • Frequency was reduced
    • Earthquake in Japan is frequent, suspension master guardian worked well
  • Schedule for O4 will be discuss later
• Tasks for post-commissioning
  • Acoustic injection

    • 6/5 : Day 1 : For only REFL (remote work) -> study of nonlinearity & up/down conversion -> DAQ trouble

    • 6/11 : Day 2 : re-measurement of Day 1

    • Unclear : Day 3 : For each booth (mine work) -> noise budget

  • Scattered light
    • One of the hammering test (lower priority, open the chamber and check)
    • OMC chamber vibration RMS (lower priority, open the chamber and check)
    • IMC scattered light by GigE camera (Explained avobe)
  • Line noise investigation by PEM
    • No action from DAC, SEO and noise budget team. Maybe skipped.
• Working style (COVID-19 related)

  • From July, (If U-tokyo level became 0.5) we can work as usual(maybe), if you have a plan to visit KAGRA site, please contact to Yokozawa first

  • Situation is unclear, I will explain in this meeting.
• 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

Jurnal paper issue

Details are here!

• PTEP (2) : noise budget(K.Yamamoto)
  • Start investigation (?)

• PTEP (3) : CAL, DET, PEM, GIF (Yokozawa) <<Submitted to CPC>>

• Acoustic injection paper (Washimi) <<Analysis ON GOING>>

• ICA for E-run/O3GK (Kume, Yokoyama) <<Analysis ON GOING>>

• Portable PEMs (Yokozawa+) <<Start investigation>>

  • Target journal->to be discussed later (PTEP?)

  • Study of the new environmental noise investigation technique using the portable monitors and Chromebook(仮)
  • section
    1. Introduction
    2. Environmental noise
    3. Portable PEM2 : Chromebook type

       • 4.1 USB type PEMs
         4.2 Combination with Chromebook and USB tpye PEMs
         4.3 Recording system and offline analysis
         4.4 Vibration injection

    4. Examples of noise investigation

       • 5.1 44Hz vibration noise
         5.2 Sound and vibration from air conditioner and FFU
         5.3 Oshino-san, Shimode-san magnetic field with circuit
         5.4 Noise investigation at OMC chamber

    5. Conclusion

• Acoustic reverberation paper (Washimi+Virgo) <<PLAN>>

• Magnetic field paper (Washimi+) <<PLAN>>

• Ground motion paper (Yokozawa+) <<PLAN>>

• PEM summary note (Yokozawa+) <<PLAN>>

• Other topics
  • If you have interested in, please contact to Yokozawa and Washimi first
  • We took many environmental data
    • Six Seismometer(Miyo+)
    • Many microphones and accelerometers(Yokozawa+)
    • Weather vs environment
    • Temperature vs suspension
    • Earthquake vs magnetic-field

      • e.g. https://ci.nii.ac.jp/naid/110003828999

    • Non linearity noise study
    • Line noise investigation(Yokozawa+)

Preparation for O3c / O4

• for O3c
  • Maybe, we don't need to discuss about O3c
• Schedule for O4
  • Expanded style chief meeting was held in 6/15
    • Jul. - Aug. DRFPMI lock trial
      • Apply sensor correction to SR suspensions
    • After them, we will start the upgrading tasks
  • PEM tasks for O4 will be discussed after this meeting with SEO
    • GND issue
    • Cabling issue
    • New PEM(?)
• for O4 preparation

  • GND issue

    • We found new ground in the center area
    • We started the rack design with AEL people

  • cabling (github204)

  • ondotori (github205)

  • water fluid (github207)

  • read out of the lightning sensor (github182)

  • RF monitor
  • tiltmeter
  • RI detector

    • Rn : contact person -> Guillaume Pronostさん (ICRR, SK)

    • cosmic-ray : plastic scintillator?
    • gamma/neutron : chikauchu
  • gravity gradient (Newtonian noise)
    • Superconducting Gravimeter
    • TOBA

Analysis report

• Yokozawa
  • Study of the 116 Hz acoustic injection to REFL table
• Washimi
  • Progress of the acoustic injection analysis
• Fujikawa
  • Lock loss study
• Progress of the ICA analysis
• Omicron and hveto study(Someone)

Place for memo