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[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.
 * Hirata-san picked up some components, which we will use in vacuum, in order to wash them in Mitaka.
 * 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 activities for the next weeks (subject to Takahashi-san's approval):

 * Removing clamps from the vacuum chambers caps. Mirapro will not do it.
 * 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.
Line 29: Line 43:

Agenda/Minutes on 2020/10/30

Zoom Meeting

CRY+VIS Interface Meeting

13:00-

Participants:

  • Post O3 Upgrade portal

  • Schedule: Wire disconnection (IX 11/13, EX 11/19), WAB safe mode (10/26-11/13).
  • FC painting.
  • IP monitoring in the next venting on 11/4 and 11/20.

VIS Meeting

14:00-

Participants:

Progress report

General

Type-A

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.
  • Hirata-san picked up some components, which we will use in vacuum, in order to wash them in Mitaka.

  • Venting finished on Monday. The buoyancy effect on keystones was reported in klog 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 15353.

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

  • Removing clamps from the vacuum chambers caps. Mirapro will not do it.
  • 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

Type-C

[Sato] IMMT2 modification parts was delivered at Oct.28.

Controls

Electronics

Towards O4

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)

KAGRA/Subgroups/VIS/VISMinutes20201030 (last edited 2020-10-30 15:04:14 by RyutaroTakahashi)