= Agenda/Minutes on 2021/1/8 =
[[https://zoom.us/j/203743987|Zoom Meeting]]

= CRY+VIS Interface Meeting =
13:30-13:55

Participants: Takahashi, Hirata, Sato, Yano, Aso, Miyo, Ushiba, Tomaru, Ikeda, Kimura, Hagiwara

[[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Upgrades/PostO3Upgrades|Post O3 Upgrade portal]]

 * Schedule for IX: Connection of ITMX was scheduled on 2/9.
 * Schedule for IY: Cooling of payload is scheduled from 1/12.
 * Schedule for EX: Let's discuss in the next time.
 * Corrugate tube fixing jig: Re-measurement at the beginning of March in IYV is planed.
 * Commissioning in vacuum:
 * Acceptance check items:
 * Jig for FC painting: Under manufacturing.
 * PF actuator: by the end of January.

= VIS Meeting =
14:00-15:00

Participants: Takahashi, Tanaka, Fabian, Sato, Hirata, Aso, Miyo, Washimi

== Progress report ==
=== General ===
=== Type-A ===
 * Remedy work in IXV.
  * Replaced three blades for TF.
  * Mounted the ballast weight on the top plate of TF keystone.
  * Assembled and tested the limit switches for the yaw and vertical FR.
  * Assembled the geophones into the pods.

=== Type-B ===
Albums

 * [[https://photos.app.goo.gl/YiRfy6a9uDf4rvcKA|BS remedying work after O3]]
 * [[https://photos.app.goo.gl/4cvWnXCdCsf9WiYf7|SR2 remedying work after O3]]
 * [[https://photos.app.goo.gl/X2eaBxsZGaRHYAQK6|SR3 remedying work after O3]]
 * [[https://photos.app.goo.gl/6C5tGpn7CLgGUG9y6|SRM remedying work after O3]]

Week of the 4th of January

SR3

 * In order to answer the question whether we should move the assembly frame next to SR3 as a back up plan,
  * We opened SRM chamber -X door, next to where the frame is now and
  * We measured the width of the clear space: 66 cm, which is enough.
  * We should ask Mirapro to move the frame, but
  * We need to move the rack with electronics and the cables and we need to allocate time to do it.
 * The IP stepper motor shaft pitch was measured to be 1.0 mm/thread.

BS

 * The IP stepper motor shaft pitch was measured to be 0.8 mm/thread.
 * We  received special screws, we installed the IP LVDTs and calibrated them:  I have not checked the data but we might need to optimize the LVDT  cards and repeat the calibration. I need to think about  this issue more  carefully.
 * Before removing IP immobilizing jig we measured the output of the LVDTs in order to recover the aligned position.
 * We replaced the heavy F0 top plate of the keystone assembly by a lighter one with ballast mass.
 * We installed the F0 yaw stepper motor with limit switches. Test pending.
 * We installed the F0 fishing rod limit switches. Test pending.

Type-B all

We checked the flanges we could use for the cables of a thermistor. See details in klog [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=15700|15700]].

=== Type-Bp ===
 * If travel for Kamioka was limited, remedy work in PR3 would be postponed to February.

=== Type-C ===
=== Controls ===
=== Electronics ===
 * Made the ver.2 LVDT combiner circuit. Preliminary result showed enough attenuation. The circuit board will be sent to Kamioka in the next week.

== Towards O4 ==
 * Type-B remedy work is on going.
 * Remedy work in IXV was started. Type-A team will go to installation in EYV parallelly.
 * Schedule.
  * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=11475|Chart]]
 * 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]]
  * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=11520|Limit switch connecting guide]]
  * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=11978|Replacement of TF blades]]
  * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=11878|Wire gluing in PR3]]
  * [[https://onedrive.live.com/?authkey=!AOLVVVKJ_Zpn-2c&cid=1447B05D5B571A84&id=1447B05D5B571A84!26691&parId=1447B05D5B571A84!26683&o=OneUp|Type-B remedying work]]
 * Criteria in the acceptance test.
  * [[https://www.dropbox.com/s/6bv15yy6hg0wn40/Acceptance%20Test%20Documentation.docx?dl=0|Inspection document (sample)]]

== Safety ==
== Discussion ==
== Travel Plans ==
The week from 1/11

 * Takahashi: -1/15
 * Sato: -1/15
 * Hirata: -1/15
 * Yano: -1/15

The week from 1/18

 * Takahashi: ?
 * Sato: 1/18-22
 * Hirata: ?
 * Yano: 1/18-22


== Next meeting ==
 * On 2020/1/15(Fri)