• KAGRA
• Subgroups
• PEM
• Meeting
• 191112
• MinuteEN

Minute of PEM meeting

• Date: 2019/11/12 17:00-18:00(JST)
• Attend：Yokozawa, TNTanaka, Mori, TTanaka, Ohkawa, Fujikawa, Kozakai, Washimi, Yamada, Kaihotsu

Agenda

• General issue
  • Meeting time

    • 17:00-18:00 -> 16:00-18:00

      • Increase the discussion item
      • Conflict with CRY meeting(?)
    • Approved to changed the meeting time
  • Interferometer status
    • We are fixing the ALS(Arm Length Stabilization system) problem.
      • Mostly fixed

    • Long silent run at 2nd Nobember (klog11312)

    • How about status of the OMC installation? Start cable connecting and jigs setting

    • See the detail in url

    • Silent run -> Some excitation(including calibration line) -> PEM injection -> Hardware injection

• PTEP paper
  • [kagra 03133]
  • KAGRA Overview papers
  • Overview of KAGRA : (3) Detchar, calibration, physical environment, data quality
• Next F2F meeting
  • RESCEU
  • 4th and 5th Dec., 2019
  • 1 slot Washimi-san will have a talk
  • If you plan to write master/doctor thesis, please let me know
    • TTanaka
  • How about undergraduate student(TNTanaka)?
• Chrome Book project (Portable PEM researcher)

  • http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Subgroups/PEM/Portable

  • We prepared two PEM Chromebook
  • Start writing paper (PTEP?)
  • ISS out-of-loop noise budget
• PEM injection
  • Shaker injection1 (TTanaka, Yokozawa)
  • acoustic injection (TTanaka, Yokozawa)
  • magnetic field injection (Niigata Tanaka, Fujikawa, Yokozawa)
• Weekly PEM measurement
  • Friday (+every morning) is weekly PEM measurement
  • Understanding the effect of the instruments, search the origin of noise, and so on
  • Tentative : 18V DC noise(24Hz), Cryochamber vibration, Air compressors, FFU, Cooler, Noise search
  • Oplev noise budget is important, but we need to consider how many oplev control will be remained
• Database for the KAGRA characteristic lines

  • url

  • Fixed bugs
• Visitors from LV
  • Anamaria from Livingston : 18 - 29 Nov.
  • Federico, Irene, Camilla (input optics) + Francesca from Virgo : 11/26-12/7 (2 weeks@KAGRA, 1 weeks@NAOJ)

    • LVK PEM meeting (11/26)

  • Fujikawa, TNTanaka 11/24-12/3
• Each progress
  • Yokozawa
    • Current serious noises
      • MICH control noise
      • ACC ground loop problem
      • New accelerometers for noise search
      • Lock state vs EXC magnetometer
    • Daily summary page
  • Washimi

    • IXC Air compressor (+TNTanaka) washimi_CRYmeeting_20191111.pdf TNT.pdf

      • Characteristic environmental noise was detected from air compressor
      • Accelerometers, microphone, (magnetometer in 1 hour)、oplev
        • Waiting the lock of the FPMI

    • KamioKaminari update https://www.icrr.u-tokyo.ac.jp/~washimi/KAGRA/PEM/KamioKaminari/

      • The plot can be generated by Kashiwa server
      • Currently, there are thunder in the Japanese sea

    • PEM map update https://www.icrr.u-tokyo.ac.jp/~washimi/KAGRA/PEM/PEMmap/

      • Pick up from the Yuzu summary page, they can see the one day plot from outside (previous version was only Kamioka site due to summary page)

    • Slow monitor page https://www.icrr.u-tokyo.ac.jp/~washimi/KAGRA/PEM/SEM/

      • Trend of the environment, such as temperature is important issue
      • Now he is making the temperature trend monitor web page
      • Monthly dependence, weekly dependence
      • We want to discuss with Miyoki-san
      • vacuum monitor trend
      • weather station monitor by Yuzu summary page
  • Kozakai
    • Trigger analysis with silent run

      • The detail was reported in the DetChar meeting

      • Kozapy was updated, please pull from github
      • Optimize the checking channels
      • If silent run was held before 6:00am, the triggered data was shown in the 12:00
  • TTanaka(ICRR)
    • Acoustic injection with FPMI (+ Washimi, Yamada, TNTanaka)
    • We held the acoustic injection with FPMI at 2nd Nov.
    • IXC, IYC, PSL room
    • EXC to microphone
    • Data analysis is ongoing
    • How to inject the low frequency?
  • Mori
    • Vacuum pump vibration
    • Uploaded to the JGWDoc
  • Fujikawa, Mori
    • No report
    • fujimopy
    • Line amplitude web page
  • Fujikawa

    • Lock loss study PEMmtg_191112lock-2.pdf

      • IO lock loss candidate by circuit histogram
        • Check the lock loss reason for only the PEM channels
        • See the spectrum for lock loss time

        • If multiple channels excess the threshold, both channels were added. 66 lock loss -> >>66 candidate

        • Set threshold by gaussian fitting and 5 sigma
        • Need additional investigation for the acc threshold
        • Now there is effect in the no data time, zero padding or ignore
        • IO guardian was changed this week (removed the reference cavity)
  • TTanaka(Niigata)
    • Preparation of the coil
    • IXC compressor study
      • Magnetic field investigation from the air compressor
      • See the spectrogram by Pastavi
  • Yamamoto, Yuzu, Andrew
    • Pastavi
  • etc