Contents
Agenda/Minutes
CRY+VIS Interface Meeting
Date: 2022/10/7 13:00-13:25
Participants: Takahashi, Yokozawa, Sato, Mitsuhashi, Aso, Hirata, Ushiba, Akutsu, Tomaru, Ikeda
Schedule
- Type-A: Test of the heater control in IY. Evaluation of the ACCs in IX.
- Type-B: Diagonalization of the IP LVDT-ACT in BS.
- Type-Bp: Monitoring of the GAS filters during the evacuation in PRM.
- Type-C: Monitoring of the IMMT suspensions during the evacuation. IM was touching the magnets in OSTM.
Status
- Replacement of cables: EXT remains.
- TM height setting:
- Oplev: Investigation of input Y.
- ACC: Evaluation.
- Commissioning in vacuum: Beam lost in POP IR PD.
Acceptance check: DropboxPaper
- Vacuum system: Pump down of the IMMT-IFI-PRM chambers from 10/4. The leak check will be continued in the next week and the next-next week.
- Heater control: Test in IY.
- TMS: Finalization of TMSY.
Discussion
VIS Meeting
Date: 2022/10/7 14:00-14:15
Participants: Takahashi, Fabian, Lucia, Washimi, Tanaka, Ushiba, Aso
Summary Report
Type-A
- Testing the heater control in IY. The heater around the cross tube can affect the BF/F3 GAS drift.
- Investigating the actuation noise in the ACCs in IX.
Type-B
- In SRM, the oplev windshield was partially removed in order to allow the search of leaks in the viewports. After such a work was done, the windshield was put back again. No leak was found.
- In the BS,
- we diagonalized the LVDT and geophone L, T and Y degrees of freedom, and the actuation also. We should provide quantitative information on how low the current residual coupling is.
- The calibration parameters of the geophones are not reported in the klog, nevertheless, the calibration TF currently used, seems to be working fine. Today, I'm trying to retrieve the values of the calibration parameters from TF measurements.
Type-Bp
Type-C
- The IM is touching the magnets in the OSTM suspension. It will be recovered after the final alignment.
Electronics
Control
Schedule
- Type-A: Investigation of ACCs.
- Type-B: IP control in BS.
- Type-Bp:
- Type-C:
Safety
Discussion
Travel Plans
(Date in Kamioka)
The week from 10/10
- Hirata: 10/12-14
The week from 10/17
- Takahashi:
- Sato:
- Hirata:
Next meeting
- 2022/10/14(FRI)