== 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 [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/DAWG/conferences|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 ([[https://gwdet.icrr.u-tokyo.ac.jp/~controls/summary/day/20241010/#gallery-1|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 ([[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=14016|planning form]])

==== Jurnal paper issue ====
[[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Subgroups/PEM/Reports/JurnalPaperIssue|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 [[https://dcc.ligo.org/G2201168|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 ====
 * [[https://www.gw-openscience.org/O3/o3aspeclines/|Line noise list in O3a public data]]
 * [[https://pubplan.ligo.org/CW/KAGRA_VectorDM.html|Summary page for KAGRA O3 vector dark matter]]