• KAGRA
• Subgroups
• PEM
• Meeting
• 250912
• Agenda

Weekly PEM meeting

• 2025/09/12(Fri) 17:00-
• Regular meeting

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

General announcement

• No PEM meeting 9/19, 9/26
• JPS meeting registration

  • https://www.jps.or.jp/activities/meetings/annual/annual-index.php

  • Meeting : 9/16 - 19
  • Need the hotel reservation as soon as possible
  • If you plan to have a presentation with PEM issue in next JPS meeting, please contact to Yokozawa and Washimi-san
  • Do we need the satellite meeting?
  • Talk plan
    • 横澤：重力波検出器KAGRAにおけるメソスケール気象現象の影響に関する研究
    • 小原：重力波望遠鏡KAGRAにおけるO4c観測中の地震の影響
    • 鷲見：神岡におけるシューマン共振磁場観測：長期観測体制の確立
    • 安部：神岡におけるシューマン共振磁場観測:シューマン共振パラメータの日周変動と季節変動

• O4c url

  • Now commissioning break, Re-start 4th June 11th June end 7th Oct. 18th Nov.

Meeting and Conference issue

• JPS at Hiroshima
  • 16th - 19th Sep.

• Slow to fast earthquake at Kochi url

  • 24th - 26th Sep.
• 2025 ENIGMA Collaboration Workshop on Astrophysics and Geophysics

  • url

  • 9th Nov. - 13th Nov.
  • Yokozawa and Washimi-san will join

• Other meetings url

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

Business travel

• To Kamioka
• From Kamioka
  • Yokozawa (Hongo, 9/4-9/8)
  • Yokozawa (Hiroshima, Kochi, 9/15 - 29)
  • Yokozawa (Hongo, someday in October?)
  • Yokozawa (South Korea, 11/8-11/14)

  • Washimi (Yamaguchi -> Hiroshima -> Kohch -> Okayama, 9/8-9/30?)

Jurnal paper issue

Details are here!

• Non-linear ICA paper
  • SEO agreed
  • arXiv submission
  • Submission to PTEP
• Schumann Resonance paper
  • Long term observation, seasonal variance
  • Amplified inside the mine
  • Others
• O4(a+c) PEM paper
  • Start to investigate the topics
• Microseism with machine learning
• 1 Hz seismic motion paper
  • Sunil-san's result?

General issue

• Commissioning
  • (4 hours Tue and Thu)
  • Main fiber laser broken
    • Now, we replaced the main laser to the NeoLASE laser
    • Long term stability (Done)
  • Warm up the mirrors
    • Check the Finesse with increasing the mirror temperature
    • No significant change
    • Since the actuation efficiency changed, we started cooling down again (just stop the heating)

Progress report

• Nishizawa, Taruya, Himemoto
  • Water Newtonian noise
  • Schumann Resonance
• Kaku
  • Magnetic field analysis
• Abe
  • Parameter estimation of the schumann resonance
• Murofushi
  • Earthquake and GIF analysis
• Obara
  • Earthquake and suspension
• Ohashi
  • Microseismic noise with machine learning
• Kume, Ueno
  • Noise subtraction
• Yokozawa
  • Lightening
• Washimi
  • Wind study

Place for memo

• Line noise list in O3a public data

• Summary page for KAGRA O3 vector dark matter