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.
• 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

• Dropbox paper

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-