Size: 3168
Comment:
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Size: 4413
Comment:
|
Deletions are marked like this. | Additions are marked like this. |
Line 22: | Line 22: |
* 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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Line 27: | Line 29: |
* Hirata-san brought into the mine the 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>>''' * '''Where's the IP fixing jig for BS?''' |
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Line 30: | Line 35: |
Possible activities for the next weeks (subject to Takahashi-san's approval): | Possible ctivities for the next weeks (subject to Takahashi-san's approval): |
Line 32: | Line 37: |
* Removing clamps from the vacuum chambers caps. Mirapro will not do it. | * 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. |
Line 35: | Line 45: |
* 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. | * 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 38: | Line 48: |
* Hirata-san talked with Shoda-san about how to check Traverser cables. * Mirapro removed ducts and bellows. |
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Line 46: | Line 59: |
* Arrangement of personnel in Nov. | * Arrangement of personnel in Nov. ([[https://www.dropbox.com/s/ow2fvqozua9vghi/VIS%20schedule%20Nov.xlsx?dl=0|table]]) |
Agenda/Minutes on 2020/10/30
CRY+VIS Interface Meeting
13:00-
Participants:
- 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.
- Hirata-san brought into the mine the 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
Where's the IP fixing jig for BS?
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
- 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
Towards O4
- Chamber opening and DGS update are on going.
- Schedule.
- Procedure documents.
- 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)