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Agenda/Minutes

Zoom Meeting


CRY+VIS Interface Meeting

Date: 2022/9/16 13:00-13:15

Participants: Takahashi, Yokozawa, Miyoki, Aso, Akutsu, Ushiba, Ikeda, Node

Post O3 Upgrade portal

Schedule

  • Type-A: Installation of the windshields in EY. Improvement of the controls.
  • Type-B: Monitoring of the evacuation.
  • Type-Bp: Recovery of the BF GAS in PR3. Monitoring of the evacuation. Centering of the oplev in PR2.
  • Type-C: Health check of the IMMT suspensions. Shift of the OMMT2 suspension in the next week.

Status

  • Replacement of cables: EXT remains.
  • TM height setting:
  • Oplev: Windshield in PR2.
  • ACC:
  • Commissioning in air:
  • Commissioning in vacuum: MICH and FPMI Lock.
  • Acceptance check: DropboxPaper

  • Vacuum system: Pump down of the center area from 9/13. Large leak in PR3-PRM and SR3-SRM.
  • Heater control: Pending.
  • TMS:

Discussion


VIS Meeting

Date: 2022/9/16 14:00-

Participants: Takahashi, Fabian, Ushiba, Tanaka, Miyoki, Washimi, Aso

Summary Report

Type-A

[Washimi]

  • The effects due to walking around IXV area were investigated. The seismometer signal drifted by walking at the wall side near the seismometer.

Type-B

  • We monitored the IPs during air evacuation from the chambers.
  • I calculated the values of the buoyancy effect.
  • I moved all GAS filters and IPs close to their setpoints.

Type-Bp

  • The GAS filters were monitored during evacuation, although there were not compensated as often as IPs.

Type-C

  • Health checks of the IMMT suspensions are ongoing. DC gain of TFs in IMMT1 is larger than IMMT2 by 3-4dB.

Electronics

Control

Schedule

  • Type-A:
  • Type-B: Oplev work.
  • Type-Bp:
  • Type-C: Shift of the OMMT2 suspension (depending on the GV status). Final check of the IMMT suspensions.

Safety

Discussion

Travel Plans

(Date in Kamioka)

The week from 9/19

  • Takahashi: 9/20-22
  • Aso: 9/20-22
  • Fabian will be on holidays.

The week from 9/26

  • Takahashi:
  • Sato:
  • Hirata:

Next meeting

  • 2022/9/30(FRI)

KAGRA/Subgroups/VIS/VISMinutes20220916 (last edited 2022-09-16 17:24:52 by RyutaroTakahashi)