Weekly PEM meeting

• 2020/02/28(Fri) 16:00-(JST)
• Regular meeting meeting (Japanese)

• Web meeting with Zoom2 (Zoom2)

Agenda

General issue

• Interferometer status
  • Observation run started without O3 joint observation
  • Average ~250kpc BNS detection range
  • Lock duration is 1h -4h
    • Alignment dependence
  • 3/10 - commissioning break(?)
• Maintenance day (2020/03/03)
  • I asked SEO about following works
  • If you have more request, please let me or Washimi-san know first.
  • 1. (Highest priority from PEM team)
    • Go inside the mine and move the PEMs placed at OMC legs to next noise target.
    • Next target is under discussion(Candidate is IXC area).
    • Change the position of the speaker to around POP area
    • We don’t need the interferometer during this work.
    • 1 hour work.
    • Yokozawa, Washimi
  • 2. (If possible)
    • Go inside the mine.
    • Turned on the all FFUs(~5min) to evaluate the noise from FFUs.
    • If we can observe the noise from FFUs in the sensitivity curve, we can consider next target.
    • If we cannot observe the noise, current noise limit may not come from the sound inside the clean area.
    • We need the interferometer during this work.
    • 10min work
    • Yokozawa, Washimi
  • 3. (If possible)
    • Go inside the mine
    • Hammering test to the cryochambers and ducts and so on to investigate the vibration effects.
    • We need the interferometer during this work.
    • Also, the hammering test PR and IMC area is essential
• PEM tasks during observation run
  • PEM injection
    • Shaker and Acoustic injection
      • PSL, REFL and AS table injection again
      • Saturday afternoon(2/29) between the lock loss and observing state
  • Hammering test
    • 20/01/21 Minute

    • Hammering test @ Y-end : around 2/15 (JGW-G2011419)

  • Discussion about the PEM flags
  • Turning off the instruments was completed
    • Check the sensitivity when we turned on the FFU
    • Microphone spectrum comparison
  • Set portable PEMs to the some point for the O3 run
    • Yend chamber?
    • Around OMC, AS table?
• Conference

  • 地下宇宙若手研究会@茂住 (2020/2/22-24)

  • JPS (2020/3/16-19 @ Nagoya)
    • Yokozawa, TTanaka

  • F2F (2020/4/17-20 @ Kashiwa) wiki

  • Core to core application
• Application of the author list
  • [kagra 03345] from Somiya-san e-mail
  • Deadline : 29th Feb.
  • エフォート率など相談がありましたら横澤までご連絡ください。
• PEM meeting
  • Tuesday may be a maintenance day
  • I want to move PEM meeting to Friday and discuss what should we do during maintenance day.

Each progress

• Yokozawa
  • What should we do this week
  • Tuned off the FFUs and vacuum pumps
    • Temperature and GAS drift
• Washimi

  • Infrasound measurements klog13004, klog12859

  • SEM updateshttps://www.icrr.u-tokyo.ac.jp/~washimi/KAGRA/SEM/

  • PEM MAP update https://www.icrr.u-tokyo.ac.jp/~washimi/KAGRA/PEM/PEMmap/

• etc