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
• 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

• KAGRA summary paper(Yokozawa) <<Submitted to CPC>>

  • Part of the KAGRA overview paper

  • PTEP (Overview of KAGRA : (3) Calibration, detector characterization, physical environment, and geophysics interferometer)klog11664

    • Installation
    • Technical issue

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

  • Target journal : Classical and Quantum Gravity
  • Request 3+8 hours data taking to commissioning
• PTEP (2) noise budget
  • Start investigation (?)

• 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
• Ground motion paper (Yokozawa+)
  • Technical note
  • Just for memo(忘備録)
  • If we can summary for special issue, we will start the discussion for journal paper
    • Lock loss study by earthquake
    • Micro-seismic motion
    • Seasonal ground motion
    • Newtonian noise
    • Baseline compensation
    • Human activity and its effect
    • etc.
• PEM summary note (Yokozawa+)
  • Just for memo, technical note
  • What we did toward the observation
  • If we can summary for special issue, we will start the discussion for journal paper
    • PEM map
    • Lock loss study
    • Scattered light
    • etc.
• Acoustic reverberation paper (Washimi+Virgo)

  • KAGRA data & Virgo data

  • need more analysis (March data in Virgo)
• Magnetic field paper (Washimi+)

  • Target journal->to be discussed later

  • section
    1. Introduction
    2. 1-year Geomagnetism in underground
    3. 1-year Schumann resonance in underground
    4. Mag. field in EXC chamber
    5. Coherence between PRFPMI and MAGs
    6. Lightning effect on PRFPMI (3/22 event)
    7. Conclusion
• Other topic
  • 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+)
    • ICA analysis for E-run/O3GK (Kume, Yokoyama)

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