== Weekly PEM meeting ==
 * 2020/02/28(Fri) 16:00-(JST)
 * Regular meeting meeting (Japanese) 
 * Web meeting with Zoom2 ([[https://zoom.us/j/6676627462|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
   * [[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)
  * 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) [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/LCGT/Meeting/f2f/2020Apr|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 [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=13181|klog13181]] -> [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=13197|klog13197]]
  * Investigation the water pump [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=13199|klog13199]]
  * 

 * TTanaka
  * 23.3Hz noise investigation

 * Yuzurihara
  * Updated Pastavi 
  * [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=12872 | Pastai update : Add button for h(t) channel, Taking overlap in PSD estimation]]
  * [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=13194 | Pastai update : Added mass-range estimation]]