== Weekly PEM meeting ==
 * 2020/06/05(Fri) 16:00- 
 * Regular meeting
 * Zoom2 : https://zoom.us/j/6676627462

=== Agenda ===

==== Conference issue ====

 * JPS meeting
  * Online meeting [[https://www.jps.or.jp/activities/meetings/autumn/autumn_index.php|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!

 * Useful management tools
  * Easy communication : Slack
  * Task management : GitHub
  * Software management : GitHub
  * Papers : Overleaf

==== 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)[[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=11664|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
    * [[KAGRA/Subgroups/PEM/GNDmeeting|GND issue]]
    * cabling ([[https://github.com/gw-pem/kagra-pem/issues/204|github204]])
    * ondotori ([[https://github.com/gw-pem/kagra-pem/issues/205|github205]])
    * water fluid ([[https://github.com/gw-pem/kagra-pem/issues/207|github207]])
    * read out of the lightning sensor ([[https://github.com/gw-pem/kagra-pem/issues/182|github182]])
    * RF monitor
    * tiltmeter
    * cosmic-ray detector

==== Place for memo ====