Weekly PEM meeting

• 2025/05/16(Fri) 17:00-
• Regular meeting

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

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)
  • ET cryo meeting 24th June
  • Explained in progress report(Yokozawa)

Meeting and Conference issue

• 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

  • Registration 15th May.
  • 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
  • Aogaku Yamazaki+ (5/16-20)
  • OMU Kaku + 3 M1 (5/18-24)

  • Kyoto U. DPRI & Korea NIMS (5/23)

• From Kamioka
  • Yokozawa (China 5/25-28)
  • Washimi (Itary, 6/7 - 7/13)
    • 6/9 - 6/11 : Virgo
    • 6/3 : Roma
    • 6/16 - 7/9 ET SPB work at Sardegna
    • 7/11 : Padova

  • 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(a+c) 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 6.8 Mpc by adjusting the alignment offset
    • Reducing the RMS of the DARM error
    • Several peaks investigation
      • 116 Hz noise is still mystery
        • Tapping test at Saturday
    • PEM injection test
      • Ongoing
  • Cooling down the suspension
  • Noise budget
  • Trouble of the ITMX
    • During the cooling down to 40 K, ITMX stacked. We tried to investigate it, but still mystery.
    • We will heat up to 80 K.

Progress report

• Nishizawa, Taruya, Himemoto
  • Water Newtonian noise
  • Schumann Resonance
• Kaku
  • Magnetic field analysis
• Murofushi
  • Earthquake and GIF analysis
• Ozaki
  • Nearby earthquake
• Obara
  • Earthquake and suspension
• Ohashi
  • Microseismic noise with machine learning
• Kume, Ueno
  • Noise subtraction
• Yokozawa
  • Results of the measurement at Kashiwa campus
• Washimi
  • PEM injection

Place for memo

• Line noise list in O3a public data

• Summary page for KAGRA O3 vector dark matter