Contents
Agenda/Minutes
CRY+VIS Interface Meeting
Date: 2022/10/14 13:00-13:15
Participants: Takahashi, Akutsu, Tomaru, Mitsuhashi, Ushiba, Uchiyama, Yokozawa, Aso, Miyoki, Hirata, Kimura, Ikeda
Schedule
- Type-A: Offload of the GAS filters in IX. Test of the heater control in IY.
- Type-B: Diagonalization of the IP in BS/SR2. Sensor correction in BS.
- Type-Bp:
- Type-C:
Status
- Replacement of cables: EXT remains.
- Oplev: Stabilization of the light source.
- ACC: Evaluation.
- Commissioning: FPMI lock with low noise suspension controls.
Acceptance check: DropboxPaper
- Vacuum system: Reak test in BS was finished. Pump down of the TMSY was started on 10/12. Leak test in IMM, IFI, PRs, and TMSY in the next week.
- Heater control: Test in IY.
- TMS: Evacuation of TMSY.
Discussion
VIS Meeting
Date: 2022/10/14 14:00-14:20
Participants: Takahashi, Uchiyama, Fabian, Lucia, Washimi, Tanaka, Ushiba, Aso
Summary Report
Type-A
- Offloaded the GAS filters in IX.
- Testing the heater control in IY.
Type-B
- BS sensor correction implemented. It seems to be working fine. Noise budget and a deeper analysis of its performance are ongoing.
- In BS too, tentative blending filters could be implemented and tested next week.
- I tracked down the location of the data used for the calibration of BS geophones. I'll do the calibration again, just for our information.
- I compared the geophone outour in SRM, SR2 and SR3. They are all similar but there are differences. I'll check again next week.
- In SR2, I did IP LVDT and actuator diagonalization. The difficulty is that the resonance frequencies in L and T are both very close to 66 mHz. Some coupling reduced, but from Y to T, actuation coupling increased to 20% of the resonance in T. I want to revert to previous values of the diagonalization matrices.
Type-Bp
- PRM: mechanical suspension models of TM have been uploaded on the filter banks.
- Control filters for strong damping is ready to be tested next week
Type-C
Electronics
- Prototyping the geophone pre-amp.
Control
Schedule
- Type-A: Investigation of ACCs.
- Type-B: Optimization of IP controls.
- Type-Bp: Test of filters.
- Type-C:
Safety
Discussion
Travel Plans
(Date in Kamioka)
The week from 10/17
- Takahashi: 10/17-19
- Hirata: 10/18-21
- Sato: 10/18-21
The week from 10/24
- Takahashi:
- Hirata:
- Sato:
Next meeting
- 2022/10/21(FRI) 13:30