Agenda/Minutes on 2020/10/9

Zoom Meeting

CRY+VIS Interface Meeting

13:40-14:10

Participants: Takahashi, Ohashi, Shoda, Hagiwara, Hirata, Ikeda, Miyo, Sato, Oshio, Ushiba, Kimura, Akutsu, Aso, Miyoki

• Post O3 Upgrade portal

• Schedule on ETMY.
  • 11/2: Opening the chambers (top and cross tube), Fixing the IP and filters, Disconnection of the cables. 11/3: Disconnection of the cryo-payload.
• MN oplev table design
  • Welding is not allowed in the tunnel. There are some ideas; gluing, flanges with extension, clamp to the view port.

VIS Meeting

14:10-15:00

Participants: Takahashi, Shoda, Ishizaki, Fabian, Hitrata, Iguchi, Miyo, Tanaka, Sato, Sugiyama, Terrence, Aso

Progress report

General

Type-A

• Clean-up of the IXV and IYV area.

Type-B

• Clean-up of the BS and SR area.
• Hirata-san asked for a quotation for 3 Top Filter keystone plates (for BS, SR3 and SR3 in case it's needed).
• Fabian made progress in writing a document about LVDT card recovery. One more working day is needed.
• We lost Hirose-san's lamps for checking cleanliness of mirrors. We'll keep looking for them.
• We lost the medium capacity scale we used for ballast mass measurement. We need to buy one. I borrowed Miyoki-san's for a few days but he wants it back.

Type-Bp

Type-C

Controls

Electronics

• Confirmation of exchange cables function in the new combiner.
• Only two channels are available in the 1U chassis.

Towards O4

• RSE Trial was extended to Oct. 12th.
• Preparation work was started.

  • Schedule and assignment of personnel

  • Cleaning procedure.

  • Inventory sheet.

  • Turn-off for the power outage. Type-A/C: Takahashi, Type-B: Fabian, Type-Bp: Miyo
• Schedule.

  • Chamber opening

  • 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] Very short introduction to VISHack Slides

Travel Plans

The week from 10/12

• Takahashi: 10/12-16
• Sato: 10/12-16
• Hirata: 10/12-16

The week from 10/19

• Takahashi: 10/19-10/23

Next meeting

• On 2020/10/16(Fri)