= Agenda/Minutes on 2020/10/30 =
[[https://zoom.us/j/203743987|Zoom Meeting]]

= CRY+VIS Interface Meeting =
13:00-13:50

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

 * [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Upgrades/PostO3Upgrades|Post O3 Upgrade portal]]
 * Schedule: Wire disconnection (IX 11/13, EX 11/19), WAB safe mode (10/26-11/13).
 * Jig for the FC painting. LED light is necessary. 
 * IP monitoring in the next venting on 11/4 and 11/20.
 * PF actuator: Measurement of coefficients and calculation of the noise (by mid Dec.).
 * Time of this meeting. 13:30 to 14:00, extended to 14:30.

= VIS Meeting =
14:00-15:00

Participants: Takahashi, Hirata, Aso, Shoda, Miyo, Sato, Fabian, Terrence, Sugiyama, Tanaka

== Progress report ==
=== General ===
=== Type-A ===
 * Tested the ribbon heaters in the X-end. The heaters on the cross tube ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=15346|klog]]) and top chamber ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=15338|klog]]) affected the height of F3/BF and F0 respectively. The temperature of BF was changed little (<0.1deg). The temperature control of heater itself is meaningful to keep the height of GAS filters.

=== Type-B ===
[Fabian]

 * I  watched Mirapro removed the bellows and ducts, especially around BS,  wich still has its oplev. Everything seemed alright. Let us measure TFs  once the DGS is recovered.
 * I asked Uchiyama-san about the BS outter frame beams. He will talk about this with Mirapro next week.
 * Hirata-san picked up some components, which we will use in vacuum, in order to wash them in Mitaka.
 * Hirata-san brought into the mine the BS and SR IP fixing jig and F0 top plate replacement.
  * '''Why do we need to IP fixing jig for SR? I think we need it only for BS because we will remove the IP LVDTs<<BR>>'''
 * Venting finished on Monday. The buoyancy effect on keystones was reported in klog [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=15322|15322]]. This is very useful information for BS and SR3 work.
 * Once  Mirapro removed the hatch doors in BS chamber that are at the BF level,  I took a look and identified places to put the ballast masses. See klog  [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=15353|15353]].

Possible ctivities for the next weeks (subject to Takahashi-san's approval):

 * Shimode-san and Yokozawa-san need to inspect SR3 and SR2 racks. I'll help them with that.
 * Visual inspection of SRM IM looking for a cable pulling.
 * Removing clamps from the vacuum chambers caps. Mirapro will not do it. People without hernia are required.
 * Opening of SRM side door. People without hernia are required.
 * Move IP ballast masses to the 2nd floor of the clean room.
 * Prepare pallet (or plastic beam replacement) for BS chamber cap.
 * Recovery of oplevs.
 * Measurement of gain resistances and phases in LVDT cards.
 * On  BS BF filter, some ballast masses are fastened with a '''very long screw.  Because we will add mass there, it would be good to estimate the length  of the screw for preparation.'''  In order to place a ruler next to it  safely, it would be good to open the chamber and lock the IP, together  with the BF cap.

=== Type-Bp ===
 * Hirata-san talked with Shoda-san about how to check Traverser cables.
 * Mirapro removed ducts and bellows.

=== Type-C ===
 * [Sato] IMMT2 modification parts was delivered at Oct.28.

=== Controls ===
=== Electronics ===
 * Asking the quotation for the test boards. Some parts would be delay.

== Towards O4 ==
 * Chamber opening and DGS update are on going.
 * Schedule.
  * Arrangement of personnel in Nov. ([[https://www.dropbox.com/s/ow2fvqozua9vghi/VIS%20schedule%20Nov.xlsx?dl=0|table]])
  * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=11475|VIS]]
 * 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]] <-- revised by Ikeda-san
  * [[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.

== Safety ==
== Discussion ==
== Travel Plans ==
The week from 11/2

 * Takahashi: 11/1-6
 * Sato: 11/1-6
 * Hirata: 11/1-6

The week from 11/9

 * Takahashi: 11/9-13
 * Sato: 11/9-12
 * Hirata: 11/9-13

== Next meeting ==
 * On 2020/11/6(Fri)