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 * In BS, a leak was found in an electrical feedthrough, we disconnected the cables to facilitate this work.

Contents

  1. Agenda/Minutes
  2. CRY+VIS Interface Meeting
    1. Schedule
    2. Status
    3. Discussion
  3. VIS Meeting
    1. Summary Report
      1. Type-A
      2. Type-B
      3. Type-Bp
      4. Type-C
      5. Electronics
      6. Control
    2. Schedule
    3. Safety
    4. Discussion
    5. Travel Plans
    6. Next meeting

Agenda/Minutes

Zoom Meeting

CRY+VIS Interface Meeting

Date: 2022/9/30 13:00-

Participants:

Post O3 Upgrade portal

Schedule

  • Type-A: Offload of the BF GAS in IY. Replacement of the HPCD in EX.
  • Type-B: Windshield in BS.
  • Type-Bp: Windshield in PR2/PR3. Monitoring of the PRM in the next week.
  • Type-C: Health check of the IMMT suspensions. Recovery of the OMMT1/2/OSTM suspensions. Final check of the OMMT/OSTM suspensions in the next week.

Status

  • Replacement of cables: EXT remains.
  • TM height setting:
  • Oplev: Windshields.
  • ACC: Evaluation.
  • Commissioning in vacuum:

  • Acceptance check: DropboxPaper

  • Vacuum system: Closing of the IMMT-IFI-PRM chambers. Leak check.
  • Heater control: Pending.
  • TMS: Viewport in TMSY.

Discussion

VIS Meeting

Date: 2022/9/30 14:00-

Participants:

Summary Report

Type-A

  • Offloaded the BF GAS in IY.
  • Evaluated the accelerometers for the IPs. The performance was worse than the prediction.

Type-B

  • We build a new windshield for the BS oplev.
  • In SR2, the seismometer on ground was calibrated with respect to the IP LVDTs and geophones.
  • In SR2, the sensor correction filter Terrence designed for SRM was copied to SRM filter banks for temporary usage.
  • In BS, a leak was found in an electrical feedthrough, we disconnected the cables to facilitate this work.

Type-Bp

Type-C

  • Took photos of the EQ stoppers and the damping magnets in the IMMT suspensions.
  • Recovered the touching points in the OMMT/OSTM suspensions.

Electronics

Control

Schedule

  • Type-A:
  • Type-B:
  • Type-Bp: Monitoring of the PRM.
  • Type-C: Final check of the OMMT/OSTM suspensions.

Safety

Discussion

Travel Plans

(Date in Kamioka)

The week from 10/3

  • Takahashi: 10/3-7
  • Hirata: 10/4-7
  • Aso: 10/3-6

The week from 10/10

  • Takahashi:
  • Sato:
  • Hirata:

Next meeting

  • 2022/10/7(FRI)

KAGRA/Subgroups/VIS/VISMinutes20220930 (last edited 2022-09-30 14:24:53 by RyutaroTakahashi)