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 joining
  • Average ~250kpc BNS detection range
  • Lock duration is 1h -4h
    • Alignment dependence
  • Duty cycle ~65%
    • We need ~1h for initial alignment
  • 3/10 - commissioning break(?)
• Maintenance day (2020/03/03)
  • I asked SEO about following works
  • If you have more request, please let Yokozawa 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 tests to the OMC, SRs, BS and PR2 were done [http://klog.icrr.u-tokyo.ac.jp/osl/?r=13138|klog13138]

      • There is large excitation when we touched the legs of the OMC chamber
      • But we concluded that vibration of the logs of the OMC chamber were not the dominant noise source in the current sensitivity

        • klog13152 and klog13199

      • Next target of investigation is the duct between PR2 and BS
        • Candidate of the 60-90Hz noise
  • Discussion about the PEM flags
    • This may not be used during O3 run, but it is good practice toward the O4 run
    • Help the RRT(Rapid Response Team, quick discussion for the event submitted to the GraceCB)
  • Evaluate the effect of the FFUs and vacuum pumps by turning on during interferometer lock
    • If the excitation detected, we have to consider about the FFUs which are working.
  • Set portable PEMs to the some point for the O3 run
    • Now, the legs of the OMC
    • Next target is IXC or PR2-BS or somewhere PRs or IMC area.
• Conference

  • JPS (2020/3/16-19 @ Nagoya)-> Cancelled

    • Yokozawa, TTanaka

  • F2F (2020/4/17-20 @ Kashiwa) wiki

  • Core to core application
    • Miyoki-san suggested to visit Virgo to join the commissioning as the PEM team
    • If you have interested in please let me know
    • Other interesting conference? Deadline is 29th Feb.
• 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.
  • Earlier time is better?

Each progress

• Yokozawa
  • Discussion about the list of the general issue
  • Current line noise identification
  • PEM coherence search to the longer locked data
  • GND issue
• Washimi
  • Investigation the environment around the OMC area
  • Investigation the water pump
• TTanaka
  • 23.3Hz noise investigation
• Yuzurihara
  • Updated Pastavi

  • Pastai update : Added mass-range estimation

  • Pastai update : Add button for h(t) channel, Taking overlap in PSD estimation