• KAGRA
• Subgroups
• PEM
• Meeting
• 200306
• Agenda

Weekly PEM meeting

• 2020/03/06(Fri) 14:00-(JST)
• Regular meeting (Japanese)

• Web meeting with Zoom2 (Zoom2)

Agenda

General issue

• Interferometer status
  • Observation run started without O3 joining
  • Maximum 500kpc BNS detection range
  • Lock duration is 1h -4h
    • Alignment dependence
  • Duty cycle ~65%
    • We need ~1h for initial alignment
  • If microseismic motion is large, we could not lock the interferometer
  • 3/10 - commissioning break
• Commissioning break (2020/03/10 9 am -03/24 9 am)
  • After the commissioning meeting, I and Washimi-san make the schedule.
• PEM tasks March
  • PEM injection
    • Acoustic injection
      • Acoustic injection to PSL room was done
      • Acoustic injection to REFL table was done.

        • We set additional accelerometers to the leg of the MCF chamber ground, IMMT1/ISS and PRM chamber leg klog13293

        • Analysis is ongoing by Washimi-san ant TTanaka-san
  • 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)
    • Seismic motion flag
  • 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.
• Conference

  • F2F (2020/4/17-20 @ Kashiwa) wiki

Each progress

• Discussion about the list of the general issue (Yokozawa)
• Bruco analysis (Yokozawa)
• PEM coherence search to the longer locked data (Yokozawa)
• GND meeting report (Yokozawa)
• Acoustic injection result (Washimi, TTanaka)

  • Sound in DARM http://klog.icrr.u-tokyo.ac.jp/osl/?r=13373

  • Sound in other channels : http://klog.icrr.u-tokyo.ac.jp/osl/?r=13298

  • Consideration of current PEM injection analysis : http://klog.icrr.u-tokyo.ac.jp/osl/?r=13263

• Seismometer tilt coupling (Washimi, Miyo)

  • http://klog.icrr.u-tokyo.ac.jp/osl/?r=13321

• 23.3Hz noise investigation (TTanaka)
• Plan of the lock loss study (Fujikawa)