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* Beam Splitter: after First Contact work last week, the H2 OSEM readout was close to the end of its usable range. * We found a cable from one of the RM coils touching the security structure. We moved it and clamped it in a slightly different position. * Then we adjusted the pitch and yaw of the BS using the picomotor and F0 yaw stepper motor respectively. * We also inspected that nothing around the BF was touching the security structure. Ushiba-san also made a quick test moving up and down the F0 and checking the output of F1 and BF LVDTs. * Finally, we moved H2 and H3 OSEMs to more suitable positions. * We measured TFs and corroborated that the system is healthy. * In SR2, the geophones stopped working, so we checked. The problem was tracked down to the geophone #2 pins powering the preamplfier. There is a short circuit between pins 4 and 5. Next week we will check the in-vacuum cables and, depending on the result, we may want to change the preamplfier or the whole geophone with its pod. |
Contents
Agenda/Minutes
CRY+VIS Interface Meeting
Date: 2022/6/3 13:00-
Participants:
Schedule
- IX: MN Oplev Laser noise (Thermometer). Offload.
- EX: Recovery from cooling (Setpoint change, Offload, Health check).
- IY: Leak test. Offload.
- EY: Leak test.
- Type-B: Recovery from FC on BS (OSEM adjustment, Cable touching, 50mHz yaw motion). Stand-alone SM driver for SR3. Geophone #2 in SR2.
- Type-Bp: Test of traverser limit SW in PRM. Installation of MSB to BS. Health check of PRs. FC on PR3 and traverser limit SW to PR3 in the next week.
- Type-C: Alignment of OMC in the next week.
Status
- Replacement of flip cables: EXT and BF temp.
- TM height setting: Following the cooling.
- Oplev: TM Oplev windshield in EX.
- ACC:
- Commissioning in air:
- Commissioning in vacuum: Y-arm lock with Stefan in the next week.
- Acceptance check:
- PF actuator: At the in-vacuum commissioning.
- New vacuum pumps for V-chambers: Test in IYV.
- Heater control: Pending.
- TMS: QPD in EX.
Discussion
VIS Meeting
Date: 2022/6/3 14:00-
Participants:
Summary Report
Type-A
- Offloaded the GAS filters in IX, EX, and IY.
Type-B
- Beam Splitter: after First Contact work last week, the H2 OSEM readout was close to the end of its usable range.
- We found a cable from one of the RM coils touching the security structure. We moved it and clamped it in a slightly different position.
- Then we adjusted the pitch and yaw of the BS using the picomotor and F0 yaw stepper motor respectively.
- We also inspected that nothing around the BF was touching the security structure. Ushiba-san also made a quick test moving up and down the F0 and checking the output of F1 and BF LVDTs.
- Finally, we moved H2 and H3 OSEMs to more suitable positions.
- We measured TFs and corroborated that the system is healthy.
- In SR2, the geophones stopped working, so we checked. The problem was tracked down to the geophone #2 pins powering the preamplfier. There is a short circuit between pins 4 and 5. Next week we will check the in-vacuum cables and, depending on the result, we may want to change the preamplfier or the whole geophone with its pod.
Type-Bp
- Health check of PR suspensions.
Type-C
Electronics
Control
Schedule
See Schedule
- Type-A: Y-arm lock.
- Type-B: Geophone in SR2.
- Type-Bp: FC on PR3. Traverser limit SW in PR3.
- Type-C: Alignmenet of OMC.
Safety
Discussion
Travel Plans
(Date in Kamioka)
The week from 6/6
- Takahashi: 6/7-10
- Sato: 6/6-10
- Hirata: 6/6-10
- Aso: 6/6-9
The week from 6/13
- Takahashi:
- Sato:
- Hirata:
Next meeting
- 2022/6/10(FRI)