Agenda/Minutes on 2020/11/27

Zoom Meeting

CRY+VIS Interface Meeting

13:30-

Participants:

• Post O3 Upgrade portal

• Leak test and removal of cryo-payload in EY.
• Evacuation of IYC. Height change: top chamber 1mm, BF 5mm.
• Jig for the FC painting.
• The connection/disconnection schedule.
  • Disconnection: ITMY by 2/26
  • Connection: ITMX after 3/2, ITMY after 3/30, ETMX after 1/12, ETMY after 5/4

• PF actuator: Measurement of coefficients --> calculation of the noise (by mid Dec.).

VIS Meeting

14:00-

Participants:

Progress report

General

Type-A

• IYC chamber was evacuated. The height of top chamber went down by 1mm.

Type-B

Type-Bp

Type-C

Controls

Electronics

Towards O4

• Type-B remedy work is on going.
• Schedule.

  • VIS

• Procedure documents.

  • Type-A tower installation

  • Limit switches

  • Limit switch connecting guide

  • Replacement of TF blades

  • Wire gluing in PR3

  • Type-B remedying work

• Criteria in the acceptance test.

Safety

Discussion

[Terrence] I would like to know the availability of the Type-B (or even Type-A) suspensions. I will be actively working on testing my methods on sensor corrections, complementary filters, and control optimization. I am also writing a paper on complementary filters so I will be collecting data from the suspensions.

Travel Plans

The week from 11/30

• Takahashi: 11/30-12/4
• Hirata: 11/30-12/4
• Sato: ?

The week from 12/7

• Takahashi: 12/7-11
• Hirata: 12/7-11

Next meeting

• On 2020/12/4(Fri)