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13:30- 13:00-
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Participants:  Participants:
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 * Schedule: Wire disconnection, WAB safe mode.  * Schedule: Wire disconnection (IX 11/13, EX 11/19), WAB safe mode (10/26-11/13).
 * FC painting.
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Participants:  Participants:
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 * 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.
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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 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.
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[Sato] IMMT2 modification parts was delivered at Oct.28.
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 * Chamber opening is on going.  * Chamber opening and DGS update are on going.
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  * [[https://www.dropbox.com/s/1s5h7lb5t4ivd55/ChamberOpen-Schedule201002-1-e.pdf?dl=0|Chamber opening]]   * Arrangement of personnel in Nov.
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 * Sato: 11/9-13  * Sato: 11/9-12

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

  • Tested the ribbon heaters in the X-end. The heaters on the cross tube (klog) and top chamber (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.
  • 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 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

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)