= Agenda/Minutes of the VIS Meeting on 2020/6/5 =
2020/6/5 14:00 -

[[https://zoom.us/j/203743987|Zoom Meeting]]

Participants: Takahashi, Fabian, Sato, Hirata, Aso, Shoda, Lucia, Ishizaki, Tanaka, Miyo

[[https://onedrive.live.com/view.aspx?resid=8E8081C20FE5EC3A!2278&ithint=file,xlsx&authkey=!AMFNtNa-Y6CVp94|Task list towards O4]]

[[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=11475|Schedule towards O4]]

== Progress report ==
=== General ===
 * Because of Nakano-san and Miyoki-san's request, Miyo made VIS_MANAGER guardian to monitor and manage all suspensions. [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=14469|klog14469]]
 * Now, this guardian requests the all suspensions to go PAY_LOCAL_DAMPED state  for safety when an earthquake hits.
 * but, there are no big earthquakes from this work. When big earthquakes happen, I will check and modify this guardian.
  
=== Type-A ===
=== Type-B ===
 * Fabian analyzed data of the SR2 suspension decay times with the control system on. Almost done but no plot to show yet.
 * On Thursday I helped Ushiba-san and Yokozawa-san to measure the BS oplev QPDs dark noise.  See klog entry [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=14473|14473]].
 * No questions about inertial damping today.

=== Type-Bp ===
=== Type-C ===
=== Controls ===
 * Type-A modeling (Shoda)
  * (for the paper) Searching for the fastest way to derive the theoretical spring constant of the actual HLs.
  * (for the cryo-p evaluation) The RT model is updated. Need update of the actuation efficiency.

=== Electronics ===
 * Started measurements of the circuits. It takes much time due to many variations of inductor.

== Post O3 ==
 * More activities in the control room and the site became available from June 1st (Noise budget measurement by Ushiba).
 * O3c has not been decided yet, but the situation is going to O4 directly.
 * The site work towards O4 is rescheduled. The extended chief meeting will be held on June 15th to discuss about the plan towards O4.

 * Tasks on electronics should be combined to the task list towards O4.
 * Procedure of the wire gluing should be confirmed beforehand.
 * Schedule including the commissioning should be considered, but overall plan and schedule, which will be discussed in the next SEO/Chief meeting, are necessary to make detail schedule.

Post Obs. task ([[https://docs.google.com/spreadsheets/d/1w4q8OvX9E6nkYSgshLYLoZH5yvQXHvGmL1agux8ztx0/edit?usp=sharing|Request]]), Task for O3c ([[https://paper.dropbox.com/doc/Plan-for-the-long-OR-brake--AxxlJFvK1IGJjqrG5nfdHfGXAQ-KqexeqMaCA7DITFGxA5ih|Plan]], [[https://www.dropbox.com/s/hoadb73fdyah02c/Post-O3%20task.xlsx?dl=0|Sheet]]).

== Safety ==
== Discussion ==
 * Papers
  * Type-A: Lucia discussed with Fujii-san.
  * Type-B: Fabian discussed with the previous Type-B team.

== Travel Plans ==
== Next meeting ==
 * On 2020/6/12(Fri)