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  * Yokozawa (JAXA 5/9-10??)
  * Yokozawa (Kas
hiwa 5/14-16??)
  * Yokozawa (China 5/25-28??)
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  * Now we discussed about the playground   * The playground approved, preparation toward the submit
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   * Latest sensitivity [[https://dac.icrr.u-tokyo.ac.jp/KAGRA/DAWG/Detchar/klog/klog33099|url]]
   * IFI treatment
    * Found the loosed screw in STM2
    * Clear improvement 128 Hz, 220 Hz
   * Added the de-whitening filter to Type-A GAS filter
    * Disappeared the peaks around 20 Hz
   * Latest sensitivity ~6.5 Mpc at maximum
   * Calibration was performed, current calculated detection range would be correct
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    * For the weaker coil driver     * For the more low power coil driver
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    * LSC control upgrade ongoing
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    * Partly done
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  * Noise hunting   * PEM investigation PR3 - PRM

Weekly PEM meeting

General announcement

  • O4c url

    • Now commissioning break, Re-start 4th June end 7th Oct.
      • Discussion about the engineering run
    • KAGRA will join this with 10 Mpc sensitivity
  • Bi-weeklky VK PEM meeting
    • To discuss the analysis during their measurements
    • Monday 17:00-(JST)
    • Next 28th Apr., 2025
  • 輪読開始します。
    • 地震学 井出先生
    • 木曜日 10:00 - 11:00(予定)
  • 休日シフト募集中
    • 三代木さんのメール参照

Meeting and Conference issue

  • 4/11 : FS地震学 B02班研究集会 @ 地震研
    • Washimi will have a presentation
  • 4/23,24 : From QUarks to Neutron Stars * url

    • Yokozawa will join the meeting
  • 5/9~10 : JGWC研究会 @ JAXA相模原
    • url

    • 発表申込締切:2025年4月7日(月)
    • 参加登録締切:2025年4月21日(月)
  • 5/19~23 : GWADW2025 @ フロリダ url

  • 5/26~27 : KIW12 @ 上海 url

    • Yokozawa will join the meeting
  • 5/26~30: ET symposium @ ボローニャ url

    • 締切:3/31
  • Other meetings url

If you have some presentations about PEM related, please contact to me.

Business travel

  • To Kamioka
    • Kaku+ (??)
    • Kyoto U. DPRI & Korea NIMS (5/23)

  • From Kamioka
    • Washimi (Tokyo 4/11)
    • Yokozawa (Tokyo 4/22-24)
    • Yokozawa (China 5/25-28??)
    • Washimi (Sardegna, Middle of June - Middle of July?)
    • Washimi (Yamaguchi -> Hiroshima -> Kohch -> Okayama, 9/8-9/30?)

Jurnal paper issue

Details are here!

  • Non-linear ICA paper
    • The playground approved, preparation toward the submit
  • Schumann Resonance paper
    • Long term observation, seasonal variance
    • Amplified inside the mine
    • Others
  • O4 PEM paper
    • Start to investigate the topics
  • Microseism with machine learning
  • 1 Hz seismic motion paper
    • Start the investigation

General issue

  • Commissioning
    • PRFPMI
      • Latest sensitivity ~6.5 Mpc at maximum
      • Calibration was performed, current calculated detection range would be correct
      • Reducing the RMS of the DARM error
        • For the more low power coil driver
        • Installed the switching circuit
        • LSC control upgrade ongoing
      • Damping the peaks around 40 Hz
        • Partly done
      • PEM injection test
        • Washimi-san will report it
    • Cooler status
      • One cryocooler for duct shield was several trouble
      • We carefully checked it
    • Noise budget
  • 出張PEM injection (planning form)

Preparation for O4b

  • Coil preparation for magnetic injection
    • Done
  • Voltmeter preparation
    • AC power monitor installation
    • DC power monitor installation

Progress report

  • Ohashi
    • Microseismic noise with machine learning
  • Kaku
    • Magnetic field
  • Murofushi
    • Earthquake and GIF noise
  • Ozaki
    • Nearby earthquake
  • Obara
    • Earthquake and suspension
  • Kume, Ueno
    • Noise subtraction
  • Nishizawa
    • Water newtonian noise
    • Magnetic field analysis
  • Washimi
    • PEM injection
  • Yokozawa
    • PEM investigation PR3 - PRM

Place for memo

KAGRA/Subgroups/PEM/Meeting/250411/Agenda (last edited 2025-04-11 04:22:15 by TakaakiYokozawa)