Weekly PEM meeting

• 2020/06/05(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

General issue

• Interferometer status
  • Now interferometer is "suspend mode" but post-observation
    • 6/1-6/5 Suspension noise budget, PEM injection
    • 6/8-6/12 Interferometer parameter measurements
  • Earthquakes at Hida area is serious
    • Frequency was reduced
    • But there are many earthquakes in Japan.
• Tasks for post-commissioning

  • Vibration measurement for OpLevs (+Ushiba, 6/1,4)-> Done

  • Acoustic injection

    • 6/5 : Day 1 : For only REFL (remote work) -> study of nonlinearity & up/down conversion (washimi will make more detaid plan)

    • Unclear : Day 2 : 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)
  • Line noise investigation by PEM
    • No action from DAC, SEO and noise budget team. Maybe skipped.
• Working style (COVID-19 related)
  • We can do data analysis in your home. Let's check PEM data!

Jurnal paper issue

• KAGRA summary paper(Yokozawa) <<Almost DONE>>

  • Part of the KAGRA overview paper

  • PTEP (Overview of KAGRA : (3) Detector characterization, calibration, physical environment, and data quality)klog11664

    • Installation
    • Technical issue

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

  • Target journal : Classical and Quantum Gravity
  • Request 3+8 hours data taking to commissioning

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

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

  • section
    1. Introduction
    2. Environmental noise
    3. Portable PEM1 : BNC type PEMs(Change the word)
    4. 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
    5. 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
    6. 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
  • Ondotori maintenance : PSL2, MCF, IXV, IXA, EXA, COOLERs, CRYDR

    • https://www.icrr.u-tokyo.ac.jp/~washimi/KAGRA/SEM/fig_RT/

  • FFU operation & particle counter (if we open the OMC)

• for O4

  • GND issue

  • cabling (github204)

  • ondotori (github205)

  • water fluid (github207)

  • read out of the lightning sensor (github182)

  • RF monitor
  • tiltmeter
  • cosmic-ray detector

Place for memo