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 * Concerning the BS F1 LVDT calibration, we tested the hardware to hold the displacement sensor above the BF. It seems to work well, although it was difficult to install it. We were not expected it to be easy, so it's fine. In principle, we aim to do the calibration next week, although that would depend on other tasks we have to do.
 * Concerning the wandering peak noise in BS F1 LVDT, we prepared to measure the voltage of the BS chamber with respect to the electrical ground. We were about to connect the cables and we were distracted by the PR2 issue. We aim to do this next week.
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 * Type-B team:   * Type-B team:

Agenda/Minutes

Zoom Meeting


CRY+VIS Interface Meeting

Date: 2021/12/17 13:00-

Participants:

Post O3 Upgrade portal

Schedule

  • IX: Finalization. Closing of the chamber on 12/14. Adjustment of the BFV. Glich in the F3 signals.
  • EX: Finalization. Closing of the chamber on 12/15. Pump down on 12/16.
  • IY:
  • EY: There is a problem (BF touching).

Status

  • Replacement of flip cables:
  • TM height setting: ITMY.
  • Oplev: Setup of the TM Oplev in IY after the TM alignment.
  • ACC: Assembly for EY is under way.
  • Commissioning in air: Return of GRY.
  • Commissioning in vacuum: Pump down of EXC/EXV on 12/15.
  • Overall commissioning:
  • Acceptance check: Review on 12/10.
  • PF actuator: At the in-vacuum commissioning.
  • New vacuum pumps for V-chambers: TMP to IXV and EXC-BRT on 12/13.
  • Heater control:
  • Power source for Oplev:

Discussion


VIS Meeting

Date: 2021/12/17 14:00-

Participants:

Summary Report

Type-A

Type-B

  • Concerning the BS F1 LVDT calibration, we tested the hardware to hold the displacement sensor above the BF. It seems to work well, although it was difficult to install it. We were not expected it to be easy, so it's fine. In principle, we aim to do the calibration next week, although that would depend on other tasks we have to do.
  • Concerning the wandering peak noise in BS F1 LVDT, we prepared to measure the voltage of the BS chamber with respect to the electrical ground. We were about to connect the cables and we were distracted by the PR2 issue. We aim to do this next week.

Type-Bp

Type-C

Electronics

Control

Schedule

See Schedule

  • Type-A team: BF in EY
  • Type-B team:

Safety

  • The helmet droped from the second floor in the PR2 booth.

Discussion

Travel Plans

(Date in Kamioka)

The week from 12/20

(F2F meeting in 12/20-21)

  • Takahashi: 12/22-24
  • Sato: 12/22-24
  • Hirata: 12/22-24

The week from 12/27

(Holidays in 12/29-1/3)

Next meeting

  • 2021/12/24(FRI)

KAGRA/Subgroups/VIS/VISMinutes20211217 (last edited 2021-12-17 12:58:31 by fabian.arellano)