Agenda/Minutes on 2020/11/13

Zoom Meeting

CRY+VIS Interface Meeting

13:30-14:00

Participants:

• Post O3 Upgrade portal

• Disassembly of the Type-A tower was finished in Y-end (11/11).
• Schedule: Wire disconnection (IX 11/13, EX 11/19), Chamber evacuation (IY 11/20).
• Jig for the FC painting.

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

VIS Meeting

14:00-

Participants:

Progress report

General

Type-A

Type-B

Type-Bp

Washimi-san, Akutsu-san, Miyo-kun, Sugiyama, Fabian.

• After Shimode-san fixed a minor problem with one of PR2 LVDT drivers, we installed it back and it worked!

• We measured the phases again. The results of almost all LVDT drivers used in PR suspensions are reported in klog 15457.

  • PRM BF recoil mass LVDT cards have not been examined because we need the problem with the misconnected cables solved.
  • One resistance in PRM SF GAS LVDT channel seems anomalous: it's value is only 1.2 Ohm whereas typical values are larger than 5 kOhm.

• PRM oplev breadboard with optics was installed on the pylon. They will turn the SLED on next week. See klog 15449.

Type-C

• [Sato](no progress)

Controls

Electronics

Towards O4

• Type-B remedy work will be started on 11/16.
• Schedule.

  • Arrangement of personnel in Nov. (table)

  • 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

Travel Plans

The week from 11/16

• Takahashi: 11/16-20
• Sato: 11/16-20
• Hirata: 11/16-20

The week from 11/23

• Aso: 11/24-27
• Takahashi: 11/24-27
• Hirata: 11/24-27
• Sato: 11/24-27

Next meeting

• On 2020/11/20(Fri)