• KAGRA
• Subgroups
• PEM
• Meeting
• 241101
• Agenda

Weekly PEM meeting

• 2024/11/01(Fri) 17:00-
• Regular meeting

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

General announcement

• Virgo ENV member have some plan to visit KAGRA about 1 month
  • Jan., Feb. or Mar. one month
  • Plan
    • Noise hunting (PEM injection) toward the 10 Mpc would be first priority
    • Power supply operation
    • Magnetic injection
    • Additional NN measurement
    • Other
• O4a noise budget paper
  • If you have a plan to write the paper using O4a data and PEM, please let me know.
• Start the investigation for the new subsystem, noise subtraction, under the SEO.
  • First meeting in Japanese member, next week

Meeting and Conference issue

• Other meetings url

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

Business travel

• To Kamioka
  • No
• From Kamioka
  • Washimi (YMAP,ET)

General issue

• Commissioning
  • PRFPMI

    • Some frequency improved (Sensitivity)

    • OMC commissioning
      • We found the OMC LSC error made the frequency conversion noise
      • By checking the acoustic injection, shaker injection, peak injection using OMC piezo.

      • We concluded the high freqnency peak of OMC LSC error (>80 Hz) DARM displacement became worse

      • During O4a, three peaks around 90 Hz exist, they made the wide frequency acoustic noise.
      • And the sideband of this peak was the low frequency noise of the OMC LSC error
      • About 8 Hz resonant noise (stack yaw resonant) exicted by the daytime traffic.
      • Now, the large peak at high frequency didn't exist, so acoustic noise became non dominant noise.
    • OMC repair work
      • Stack connection to avoid the 80 Hz resonance
      • OMC shroud installation check (Now removed)
      • Ghost beam investigation
  • Schedule
    • OMC repairing (10/17-25)
    • Cooling down (ongoing)
    • High power challenge 5 W (11/5 - 8)
    • Noise budget (11/11 - 15)

• 出張PEM injection (planning form)

Jurnal paper issue

Details are here!

Preparation for O4b

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

Progress report

• Yuzurihara
  • Pastavi

  • Data Quality Report slide

  • Data quality evaluation
• Sato
  • Acoustic injection analysis
• Ohashi
  • Microseismic noise with machine learning
• Kume
  • Noise subtraction
• Nishizawa
  • Water newtonian noise
  • Magnetic field analysis
• Washimi
  • OMC test at NAOJ
  • Preparation of the large coil
• Yokozawa
  • Noise hunting

Place for memo

• Line noise list in O3a public data

• Summary page for KAGRA O3 vector dark matter