Weekly PEM meeting

• 2023/08/18(Fri) 17:00-
• Regular meeting

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

General announcement

• New KSC chair and vice-chair
  • Masaki Ando
  • Ray-Kuang Lee and Sachiko Kuroyanagi
• Open the registration LVK meeting@Toyama
  • Poster abstract submission
    • 27th August
  • 2023/09/11-15
  • Including the F2F meeting

  • url

  • Welcome the visitor
    • Deep Clean member
    • Kamiel and Anoop
• KAGRA visiting plan
  • If you want to visit Kamioka, please contact to Yokozawa

Meeting and Conference issue

• LVK meeting at Toyama
  • 11-14 September 2023
  • KAGRA F2F meeting on Sep. 15
• JPS meeting (Tohoku U)
  • 16-19 September 2023
  • Presentation about PEM
    • Yokozawa (Status)
    • Washimi (Noise hunting)
    • Hoshino (Seismic forecast)

• Other meetings url

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

Business travel (except for conferences)

• To Kamioka
  • Hoshino(8/8 - 10)
• From Kamioka
  • No

General issue

• Cooling down
  • EX : Achieved 20 K in IM
    • Monitored the height by MNV oplev and TCam

      • The SUM value of MNV oplev decreased with temperature, that turned out the clipping by the viewport of radiation shield klog26232

      • Now recovered, but SUM decreasing continued
    • Serious frosting and finesse down detected
      • Turned on the heater at IM, after increasing 30 K, the finesse recovered

      • Still some frosting at AR side from picture klog26336 and oplev sumklog26308

      • During PRFPMI locked, the temperature of IM gradually increasedklog26358.

  • IX, IY, EY ongoing : about 110 K in IM (2023/08/18)

    • Temperature change url

• Vacuum level trouble
  • EX : performance of one cryocooler became worse
    • No serious damage to the test mass
    • Plan to restart it around LVK meeting(September)
  • Yarm
    • Y-21 vacuum trouble
      • Now, by turning on the TMP, keep good vacuum level
• New high power laser replacement
  • Temperature drift would be smaller by tuning the temperature control
  • But if we increased the output laser power from PSL room, IMC cannot be locked.
  • Now operating the current old laser
• Alignment inside the PSL room
  • PMC alignment done(No so serious change)
  • GR alignment done (Increased the beam power)
• Interferometer operation
  • After checking the POP and REFL table again, and found one BS flipped.
    • Then, PRFPMI RF became more stable (One night lock)
• New IP control
  • Ongoing
• PEM tasks
  • Outside magnetometer
    • DAQ system trouble? Washimi-san sent to company
  • Acoustic noise at OMC
    • Re-cabling for OMC speaker
  • AC power check at Yend
    • SUM value of the MNV oplev decreased
    • No problem in AC power supplying

• 出張PEM injection (planning form)

Jurnal paper issue

Details are here!

• Micro seismic analysis (Hoshino)
  • Submited to CQG

  • Overleaf

  • http://arxiv.org/abs/2306.12437

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

Preparation for O4b

• Check the seismic motion around mozumi area
  • Daytime ground motion
  • It may appeared in DARM sensitivity (SR3?)
• Schumann resonance measurement
  • Ongoing
• Investigation of the PEM injection
  • Magnetic injection
    • After O4a?
• Voltmeter preparation
  • AC power monitor installation
  • DC power monitor installation
• After O4
  • RF monitor with mokugo
  • Tiltmeter
  • RI detector
  • Newtonian noise
• Discussion with DET members
  • Daily summary page PEM

Progress report

• Yuzurihara
  • Pastavi

  • Data Quality Report slide

  • Data quality evaluation
• Hoshino
  • Seismic motion analysis
• Sato
  • Sound source analysid
• Miyamoto
  • Weather analysis
• Takatani
  • Applying the deepclean
  • Calculation of Schumann resonance
• Kume

  • PR3 line injection klog25670

  • Noise subtraction
• Nishizawa
  • Water newtonian noise
  • Magnetic field analysis
• Washimi
  • Magnetometer DAQ status
• Yokozawa
  • AC power monitor

Place for memo

• Line noise list in O3a public data

• Summary page for KAGRA O3 vector dark matter