Differences between revisions 11 and 12

Agenda/Minutes on 2020/10/23

CRY+VIS Interface Meeting

13:30-14:00

Participants:

14:00-

Participants:

Set up the ribbon heaters in IX for the temperature control test. But the test conflicted with the vent of chamber. --> Move to EX and test them in the next week.

[Fabian]

On Saturday Miyo-kun, Washimi-san and Fabian went to the tunnel and rerouted and reconnected cables in SR suspensions (IP and GAS LVDTs and FRs). We also reconnected the coil cables in BS OSEM satellite boxes for Guardian test.
- Fabian confirmed the cabling was fine by using the fishng rods and monitoring motion with the LVDTs. I wrote the polarity down for Ikeda-san to use. See klog 15272.
- Miyo-kun confirmed the new Guardian works for BS suspension. See klog 15276.
Hirata-san and I gave some feedback to Matteo about how we helped Hirose-san with the cleanliness of the mirrors before O3GK.
In the context of Ikeda-san's work with stepper motor scripts, together with Miyo-kun I revisited the IP fishing rods transformation matrices.
Before venting of the central room Fabian set the IPs and GAS filters in suitable positions (various klog reports). In the case of GAS filters it's useful to measure the keystone displacement due to bouyancy.
I checked SRM BF condition on Wednesday before the venting. See klog 15305. In previous analysis, it seemed the keystone hit a hard physical stop because it stopped moving when lowered. However, on Wednesday it didn't stop moving, but an oscillation at 40 mHz appeared. Currently I especulate it's a cable pulling.
I monitored the Type-B suspensions during venting. See klog 15307. I'll report the size of the bouyancy correction next week.
I wrote a To DO list for next week in Github: Type-B TODO list.

Chamber opening will be started from Oct. 26.
Preparation work is on going.
- Cleaning by the company
- Monitoring for vent. Date: 19(EY), 21(IX, IY, EY), 22(IX, IY, EY, Center). Charge: Miyo, Ikeda, Fabian
- New guardian test on 19 in PR2 and BS.
Schedule.
- Chamber opening
- VIS
Procedure documents.
Criteria in the acceptance test.

The week from 10/26

The week from 11/2

KAGRA/Subgroups/VIS/VISMinutes20201023 (last edited 2020-10-23 15:24:10 by RyutaroTakahashi)

-  ⇤ ← Revision 11 as of 2020-10-22 16:42:19 → 
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+   ← Revision 12 as of 2020-10-22 17:02:37 → ⇥
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+ * Set up the ribbon heaters in IX for the temperature control test. But the test conflicted with the vent of chamber. --> Move to EX and test them in the next week.