== Weekly PEM meeting ==
 * 2020/03/06(Fri) 14:00-(JST)
 * Regular meeting (Japanese) 
 * Web meeting with Zoom2 ([[https://zoom.us/j/6676627462|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 [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=13293|klog13293]]
     * Analysis is ongoing by Washimi-san ant TTanaka-san
  * Hammering test
   * [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Subgroups/PEM/Meeting/200121/Minute|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 
     * [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=13152|klog13152]] and [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=13199|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) [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/LCGT/Meeting/f2f/2020Apr|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)