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Size: 1905
Comment:
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Size: 2961
Comment:
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| Deletions are marked like this. | Additions are marked like this. |
| Line 47: | Line 47: |
| * To try to eliminate the wandering noise in the BS F1 LVDT, we connected the BS chamber to electrical ground using a power cable: it did not have any effect ([[https://klog.icrr.u-tokyo.ac.jp/osl/?r=19034|klog 19034]]). * Before connecting, we measured the voltage betwwen the chamber and the ground: 17 mV rms. * We also checked the resistance between the connector that plugged into the rack and the chamber: it was only 0.2 Ohm, indicating there wasn't any problem with the cable. * The wandering peak is not observed in any other GAS filters in Type-B suspensions ([[https://klog.icrr.u-tokyo.ac.jp/osl/?r=19027|klog 19027]]). * More ideas are welcome. * We calibrated the BS F0 LVDT. The new calibration factor and offset are already in the medm screen and accepted in the SDF ([[https://klog.icrr.u-tokyo.ac.jp/osl/?r=19057|klog 19057]]). * We changed flip adapters in the BS chamber. * Hirata-san finished the mechanical design of the holder for the laser displacement sensor, which will be used to calibrate the BS F1 filter. |
Contents
Agenda/Minutes
CRY+VIS Interface Meeting
Date: 2021/12/3 13:00-
Participants:
Schedule
- IX: Finalization of cryo-payload. Replacement of flip cables.
- EX: Finalization of cryo-payload. Height adjustment of TM.
- IY:
- EY: Some problems (actuators, F0 yaw FR).
Status
- Replacement of flip cables: IX on 12/2.
- TM height setting: ITMY.
- Oplev: Setup of the TM Oplev in IY after the TM alignment.
- ACC: Driver setup for IY on 12/2. Assembly for EY is ongoing.
- Commissioning in air: Return of GRY.
- Commissioning in vacuum: Chamber closing is scheduled from 12/13.
- Overall commissioning:
- Acceptance check: Review by 12/8.
- PF actuator: At the in-vacuum commissioning.
- New vacuum pumps for V-chambers:
- Heater control:
- Power source for Oplev: IX.
Discussion
VIS Meeting
Date: 2021/11/26 14:00-
Participants:
Summary Report
Type-A
- Adjusted the height of TM in EX. The height of the BF damper and the F1 damper was adjusted as well.
- Replaced the flip cables in EX.
- Setup the drivers for the accelerometers in IY.
Type-B
To try to eliminate the wandering noise in the BS F1 LVDT, we connected the BS chamber to electrical ground using a power cable: it did not have any effect (klog 19034).
- Before connecting, we measured the voltage betwwen the chamber and the ground: 17 mV rms.
- We also checked the resistance between the connector that plugged into the rack and the chamber: it was only 0.2 Ohm, indicating there wasn't any problem with the cable.
The wandering peak is not observed in any other GAS filters in Type-B suspensions (klog 19027).
- More ideas are welcome.
We calibrated the BS F0 LVDT. The new calibration factor and offset are already in the medm screen and accepted in the SDF (klog 19057).
- We changed flip adapters in the BS chamber.
- Hirata-san finished the mechanical design of the holder for the laser displacement sensor, which will be used to calibrate the BS F1 filter.
Type-Bp
Type-C
Electronics
Control
Schedule
See Schedule
- Type-A team: Review of IX and EX. Recovery of actuators in EY.
- Type-B team:
Safety
Discussion
Travel Plans
(Date in Kamioka)
The week from 12/6
- Takahashi: 12/7-10
- Sato: 12/7-9
- Hirata: 12/7-10
The week from 12/13
- Takahashi: 12/13-17
- Sato: 12/13-17
- Hirata: 12/14-17
Next meeting
- 2021/12/10(FRI)