= Agenda/Minutes of the VIS Meeting on 2020/8/28 =
2020/8/28 14:00 - 16:00

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

Participants: Takahashi, Hirata, Miyo, Fabian, Ishizaki, Sato, Shoda, Tanaka, Terrence

== Progress report ==
=== General ===
 * Preparing Github for the management of the tasks.

=== Type-A ===
=== Type-B ===
 * Cable preparation for yaw stepper motor [Sato]
  * The five cables requested will be ordered in early October. However, would you consider the following alternatives.
   * For four (50 cm , kapton, M-Dsub<>bundy plug) cables. We have six unused cables of different lengths with similar specifications.([[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=3901|JGW-D1503901/24]])

   * For (2.5m, F-Dsub<>F-Dsub) cable. We have Type2-2m(Dsub F-F, kapton) and Type4-1m(Dsub F-M, kapton). Two cables can be connected and extended.
 * Type-B paper: I received corrections, including the referees'. Thank you for your observations. I'm working on them.
 * I worked in Type-B remedying work procedures and time allocation: see below.

=== Type-Bp ===
=== Type-C ===
 * A concrete design proposal for IMMT2 modificaion has been uploaded. (JGW-D2011918)

=== Controls ===
 * New RT model base was created by Nakano-kun. We shared the concept with core members (Nakano, Miyo, Terrence, Fabian, Ushiba, Shoda).
   Terrence will upgrade for the Type-B and -Bp. If the upgrade is necessary for RSE, Miyo and Shoda will do.

=== Electronics ===
 * Designing the circuits. Device size can fit to them.

== Towards O4 ==
 * KAGRA is in "RSE Trial" now.
 * Procedure documents.
  * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5500|Type-A tower installation]]
  * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=11598|Limit switches]], <-- revised
  * [[https://www.dropbox.com/s/mk3rqf07xnr818e/TF%20blade%20replacement%20procedure.doc?dl=0|Replacement of TF blades (Draft)]]
  * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=11878|Wire gluing in PR3]]
  * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=11534|Type-B remedying work]]
   * There's an updated version but it hasn't been uploaded to JGWDoc. Use this [[https://1drv.ms/b/s!AoQaV1tdsEcUgdBD4tVVUon9mmf7Zw?e=f6ORQ4|link]] instead.
   * See the last two slides of this [[https://1drv.ms/b/s!AoQaV1tdsEcUgdA2NHJtRoAN3fQrRQ?e=THDZi4|presentation]].
 * Acceptance Test ([[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Subgroups/VIS/Acceptance%20Test|Wiki page]]).
 * Schedule towards O4 was revised ([[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=11475|Chart]]).

cf. 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]]), Task towards O4 ([[https://www.dropbox.com/s/60oygtwmckmdyj6/Towards%20O4%20on%20VIS%20.xlsx?dl=0|List]])

== Safety ==
== Discussion ==
 * [Terrence] New features for the suspensions, type-A and type-B, as pre-O4 upgrades (II).
  * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=11889|Presentation slides]]
 * [Ishizaki] GAS filter improvement for post O4.[[attachment:slide.pdf]]

== Travel Plans ==
== Next meeting ==
 * On 2020/9/4(Fri)