• KAGRA
• Subgroups
• PEM
• Meeting
• 240105
• Agenda

Weekly PEM meeting

• 2024/01/05(Fri) 17:00-
• Regular meeting

• Zoom2 : https://zoom.us/j/6676627462

General announcement

• 新年明けましておめでとうございます。
  • 2024年もよろしくお願いします。
• Kamioka visiting plan
  • Yokozawa and Washimi-san have several budgets (共同利用)
    • So we want to call not only PEM members but also KAGRA members who are interested in onsite.
    • If you want to visit Kamioka, please contact Yokozawa

  • Hoshino & Sato will stai Kamioka on February (3weeks?)

• O4b
  • Break : mid-January - mid-March, 2024
  • Virgo : will join in March
  • KAGRA : Three-month observation around here
• O4a noise budget paper
  • If you have a plan to write the paper using O4a data and PEM, please let me know.

Meeting and Conference issue

• VK PEM meeting (Postponed)
  • 2024/01/18(Thu) 19:00-(JST), 10:00-(UTC), 11:00- (CET)
• LBGT@Yokokoku

  • https://www.lowbg.org/ugap/ws/lb2023/index.html

  • workshop of underground experiments
  • Washimi will have a presentation of rain, snow, underground water
  • Miyamoto-kun will have a poster presentation.
• JPS (online) 2024/3/18-21

  • https://www.jps.or.jp/activities/meetings/spring/spring_index.php

  • 一般講演申込（※早期参加登録/概要集申込、原稿送信含む）
    • Hoshino (Earthquake)
    • Miyamoto (weather)
    • Sato (Sound)
    • Takatani (Noise subtraction)
• UGAP2024 @ Tohoku U 2024/3/4~6

  • https://www.lowbg.org/ugap/ws/am2023/index.html?LangP=JP

  • international conference of underground experiments
  • Washimi will have a presentation of lightnings and thunders
• 第4回新学術「地下宇宙」若手研究会 @ Tohoku U 2024/3/7~8

  • https://www.lowbg.org/ugap/ws/yr2023/index.html

• Other meetings url

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

Business travel (except for conferences)

• To Kamioka
  • Hoshino (February?)
  • Sato (Febryary?)
• From Kamioka
  • No plan

General issue

• Effect of earthquake
  • Noto earthquake at 1/1
  • Instruments and facility : no serious damage
  • IMC alignment : need more investigation
    • Alignment of Type-C suspension
• Cooling down
  • IX,EX,EY : Radiation shield cooling down : 84-88 K
  • EY : Started the cooling down duct shield
    • 120 K

  • Temperature change url

  • After starting the cooling down after measuring the Q-value of sapphire fiber
• Interferometer operation
  • PRFPMI DC readout Succeeded
    • Need to reuducing the DARM RMS to be stable operation
      • 10 Hz noise hunting
        • Current sensitivity curve around 10 Hz is worse compared from O4a (Similar level of O3GK)
        • Some coherence with voltage monitor
• Q value measurement
  • Mirror Q value measurement at IX, EX, EY

    • Current summary : JGWDoc15445

  • Suspension (violin) Q value measurement
• New IP control
  • Ongoing
• Strategy for noise hunting

  • klog26848

• 出張PEM injection (planning form)

Jurnal paper issue

Details are here!

• Micro seismic analysis (Hoshino)
  • Submited to Physica Scripta

  • Overleaf

  • http://arxiv.org/abs/2306.12437

• Acoustic reverberation time paper (Washimi+, Sato?)
  • Suspend
  • Re-measurement before O4?
• TCam paper
  • Writing ongoing

Preparation for O4b

• Snow monitor
  • Ongoing
• PEM installation
  • Waiting the timing of TMSX and TMSY
• Evaluation of newtonian noise
  • Anoop and Washimi
• Investigation of the PEM injection
  • Magnetic injection
• Voltmeter preparation
  • AC power monitor installation
  • DC power monitor installation

Progress report

• Yuzurihara
  • Pastavi

  • Data Quality Report slide

  • Data quality evaluation
• Hoshino
  • Seismic motion analysis
• Sato
  • Sound source analysis
• Miyamoto
  • Weather analysis
• Takatani
  • Noise subtraction with machine learning
• Kume

  • PR3 line injection klog25670

  • Noise subtraction
• Nishizawa
  • Water newtonian noise
  • Magnetic field analysis
• Washimi
  • Snow monitor
  • Automation of the Schumann resonance monitoring
  • Signals from the Noto earthquake and tsunami

    • Seismometers : saturated (https://klog.icrr.u-tokyo.ac.jp/osl/?r=28153)

    • Accelerometers : Clearly obsurved (https://klog.icrr.u-tokyo.ac.jp/osl/?r=28155)

    • Infrasound/Microphones : Tsunami signal was detected at Mozumi outside. Underground microphoned alse detected ~10Hz signal. (https://klog.icrr.u-tokyo.ac.jp/osl/?r=28151)

    • Magnetometers : Glithces at the CS and X-end, but not in the Y-end. (https://klog.icrr.u-tokyo.ac.jp/osl/?r=28179)

    • Voltagemeters : DV level of the GND voltage was changed. (https://klog.icrr.u-tokyo.ac.jp/osl/?r=28175)

    • Water fluid : Total amount though the Y-end was increased. (https://klog.icrr.u-tokyo.ac.jp/osl/?r=28159)

    • Room temperature : No serious behavers. (https://klog.icrr.u-tokyo.ac.jp/osl/?r=28154)

    • Vacuum pressure : EY was getting a little bit worse, but comming back now.(https://klog.icrr.u-tokyo.ac.jp/osl/?r=28147)

• Yokozawa
  • Noise budget in current IFO

Place for memo

• Line noise list in O3a public data

• Summary page for KAGRA O3 vector dark matter