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Editor: RyutaroTakahashi
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Date: 2023/6/23 13:00- Date: 2023/6/23 13:00-13:30
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Participants: Participants: Takahashi, Miyaki, Uchiyama, Mitsuhashi, Ikeda, Ushiba, Akutsu, Yokozawa, Aso
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 * Type-B:
 * Type-Bp:
 * Type-C: Measurements of noise budget in PRM and BS.		  * Type-B: Measurements of noise budget in BS.
 * Type-Bp: Measurements of noise budget in PRM
 * Type-C:
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 * IP control with the ACCs.  * IP control with the ACCs: After the CAL week.
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 * Check of the length Oplev.
 * Noise budget of the cryo-payloads.
 * Temperature control for the Oplev: Preparing for the heater controller.		  * Check of the length Oplev: At the time of the laser replacement.
 * Noise budget of the suspensions: PR2/3, Type-C, tower in the next time.
 * Temperature control for the Oplev: Preparing for the heater controller. Making the cables.
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Participants: Participants: Takahashi, Sato, Akutsu, Mitsuhashi, Tanaka, Ushiba, Aso
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 * Measured the noise budget in ETMY, ETMX, ITMX, and ITMY (GAS as well as cryo-payload).
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 * Measured the noise budget in BS.
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 * Measured the noise budget in PRM.
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 * Measured the resonant frequencies and the dependence in the center of gravity.
 * Transfer function in T-direction should be measured.
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  * Design of the blade damper.
  * Design of the flexible pendulum damper.

Contents

  1. Agenda/Minutes
  2. CRY+VIS Interface Meeting
    1. Suspensions
    2. Other items
    3. Post O4a
    4. Discussion
  3. VIS Meeting
    1. Summary Report
      1. Type-A
      2. Type-B
      3. Type-Bp
      4. Type-C
      5. Electronics
      6. Control
      7. R&D
      8. Toward O5
    2. Schedule
    3. Safety
    4. Discussion
    5. Next meeting

Agenda/Minutes

Zoom Meeting

CRY+VIS Interface Meeting

Date: 2023/6/23 13:00-13:30

Participants: Takahashi, Miyaki, Uchiyama, Mitsuhashi, Ikeda, Ushiba, Akutsu, Yokozawa, Aso

Acceptance check document

Suspensions

  • Type-A: Measurements of noise budget in ETMY, ETMX, ITMX, and ITMY.
  • Type-B: Measurements of noise budget in BS.
  • Type-Bp: Measurements of noise budget in PRM
  • Type-C:

Other items

  • Oplev:
  • ACC:
  • Commissioning:
  • Vacuum system:
  • Heater control:
  • TMS:

Post O4a

  • Measurements of the DAC noise: Every Friday from 7/7.
  • Measurements on the sensor correction in SR2: 1 night.
  • Optimization of the damping control in PRs: Measurements 2 days, Test 3 days.
  • IP control with the ACCs: After the CAL week.
  • In-vacuum accelerometer for IOO: Check the geophone pod on 6/27.
  • Hight adjustments of Type-A in the cooling.
  • Measurement of the drum-head modes: 6/28.
  • Check of the length Oplev: At the time of the laser replacement.
  • Noise budget of the suspensions: PR2/3, Type-C, tower in the next time.
  • Temperature control for the Oplev: Preparing for the heater controller. Making the cables.
  • Check of the space in the OMC/IMMT chamber: Sato-san made drawings for OMC.

Discussion

VIS Meeting

Date: 2023/6/23 10:00-11:00

Participants: Takahashi, Sato, Akutsu, Mitsuhashi, Tanaka, Ushiba, Aso

Summary Report

Type-A

  • Measured the noise budget in ETMY, ETMX, ITMX, and ITMY (GAS as well as cryo-payload).

Type-B

  • Measured the noise budget in BS.

Type-Bp

  • Measured the noise budget in PRM.

Type-C

Electronics

Control

R&D

  • Measured the resonant frequencies and the dependence in the center of gravity.
  • Transfer function in T-direction should be measured.

Toward O5

Schedule

  • Noise budget.

Safety

Discussion

  • Damping of the OMC suspension.
    • Design of the blade damper.
    • Design of the flexible pendulum damper.

Next meeting

  • 2023/7/7 10:00-

KAGRA/Subgroups/VIS/VISMinutes20230623 (last edited 2023-06-23 13:38:58 by RyutaroTakahashi)