Differences between revisions 3 and 8 (spanning 5 versions)
⇤ ← Revision 3 as of 2020-01-23 06:30:24 →
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Editor: TakaakiYokozawa
Comment:
← Revision 8 as of 2020-01-28 11:24:39 → ⇥
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Editor: tatsuki.washimi
Comment:
Deletions are marked like this. Additions are marked like this.
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  * December 17-24 24h engineering run
   * [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/EngineeringRun/ER191217_24/ | wiki]]
   * We also held the post ER. We turned off the FFUs and vacuum pumps
  * Lock acquisition to PRFPMI
  * There is still some peaks in the lower frequency
   * Type-A resonant frequency [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=11116|JGWDoc11116]]
  * Peaks appeared at higher frequency
   * PEM injection to REFL table
  * After that, we will move to noise hunting		   * Finally, we can lock the PRFPMI
   * Transmittance laser power became 100 times higher than FPMI
   * Lock duration is about 30min at maximum
  * OMC commissioning is also ongoing
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 * PEM plan January
  * Identification of the ~100Hz noise source
   * (Maybe, ) the dominant noise for lower frequency may come from suspension
  * After the success of the PRFPMI (or chance to operate the FPMI), we would like to do following things
   * Understanding the coupling function detected at the refl table
    * At the some point, we detected the larger coupling function
    * Periscope or some optics?
  * We would like to inject sound or vibration to AS, POP and TMS table		  * New PEMs
  * We bought the ACO power supply, microphone and accelerometers(end of Feb.)
  * Basically the portable PEMs

 * PEM plan
  * PEM injection
    * Shaker injection (TTanaka, Yokozawa)
    * Acoustic injection (TTanaka, Yokozawa)
      * PSL, REFL and AS table injection (Defence of TT Thesis -> tomorrow)
   * magnetic field injection (Niigata TTanaka, Fujikawa, Yokozawa)
     * Effect of the air cooler magnetic field
     * AS, REFL table injection
     * He is writing the thesis
  * Hammering test
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 * PEM festival
  * 01/14(Tue) 9:00-15:00
   * Evaluate the scattered light for payload (with CRY team) [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=12293]]
  * 01/15(Wed) (Maybe expanded)
   * Turned off almost all FFUs and vacuum pumps		   * Turning off the instruments
  * Many microphone in the PSL room
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 * PEM injection
  * Shaker injection1 (TTanaka, Yokozawa)
  * acoustic injection (TTanaka, Yokozawa)
   * PSL, REFL and AS table injection
   * Analysis is ongoing
  * magnetic field injection (Niigata Tanaka, Fujikawa, Yokozawa)
   * Effect of the air cooler magnetic field
   * AS, REFL table injection
   * He is writing the thesis
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 * Newtonian noise measurement
  * Thank you for Virgo PEM member!
  * Francesca mainly measured the newtonian noise
  * We will discuss in 21st. Jan.(Virgo KAGRA PEM meeting)

 * PEM measurement
  * Someday : Effect of the sound to DARM displacement
  * Someday : Environmental check around BS (including the POP)
  * Someday : Evaluation of the table cover
  * Someday : SR2 and SR3 optical lever (Reflection light from SRM?)
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  * IX. IY microphone
  * Instrument switch off
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  * Preparation for the hammering test @ Y-end [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=12497|klog]]
  * Sound reverberation study (KAGRA & Virgo)		   * Preparation for the hammering test @ Y-end [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Subgroups/PEM/Meeting/200121/Minute|200121/Minute]]
  * Noise around 100Hz [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=12629|klog12629]]
  * Portable PEM with DataLogger [[https://github.com/gw-pem/kagra-pem/issues/201|GutHub201]]
  * PEM chassis [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=11425|JGW-T2011425]]
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  * Offline detchar report for the part of the PEM   * Coupling with calibration line
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  * shaker injection with FPMI[[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=11117|speaker@12/8]],[[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=11128|shaker@12/15]]
  * Master thesis[[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=10387|thesis]]		   * shaker injection with FPMI
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  * Lock loss study2
  * fujimopy 		  * Lock loss study
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Weekly PEM meeting

  • 2020/01/28(Tue) 16:00-(JST)
  • Regular meeting meeting (Japanese)

  • Web meeting with Zoom2 (Zoom2)

Agenda

General issue

  • Interferometer status
    • Finally, we can lock the PRFPMI
      • Transmittance laser power became 100 times higher than FPMI
      • Lock duration is about 30min at maximum
    • OMC commissioning is also ongoing

    • ~100Hz noise and line noise of the higher frequency -> PEM

  • New PEMs
    • We bought the ACO power supply, microphone and accelerometers(end of Feb.)
    • Basically the portable PEMs
  • PEM plan
    • PEM injection
      • Shaker injection (TTanaka, Yokozawa)
      • Acoustic injection (TTanaka, Yokozawa)

        • PSL, REFL and AS table injection (Defence of TT Thesis -> tomorrow)

      • magnetic field injection (Niigata TTanaka, Fujikawa, Yokozawa)
        • Effect of the air cooler magnetic field
        • AS, REFL table injection
        • He is writing the thesis
    • Hammering test
    • Long term PEM evaluation
    • Turning off the instruments
    • Many microphone in the PSL room
  • Conference

Each progress

  • Yokozawa
    • Planning toward the O3 run
    • IX. IY microphone
    • Instrument switch off
  • Washimi
  • Kozakai
    • Coupling with calibration line
  • TTanaka(ICRR)
    • shaker injection with FPMI
  • Fujikawa
    • Lock loss study
  • TTanaka(Niigata)
    • Magnetic field from air cooler and compressor
    • Magnetic field injection to AS and REFL table
  • etc

KAGRA/Subgroups/PEM/Meeting/200128/Agenda (last edited 2020-01-28 13:59:39 by chihiro.kozakai)