Agenda/Minutes

Zoom Meeting

CRY+VIS Interface Meeting

Date: 2022/6/3 13:00-13:40

Participants: Takahashi, Miyoki, Ikeda, Akutsu, Uchiyama, Hirata, Sato, Node, Ushiba, Yokozawa, Aso

Post O3 Upgrade portal

Schedule

• IX: MN Oplev Laser noise (Preparing for temperature control). 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). Visual inspection of BS is necessary. 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 late next week.
• Type-C: Alignment of OMC in the next week (Start from Y-arm alignment).

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 and transmission of X-arm in the next week.
• Acceptance check:
• PF actuator: At the in-vacuum commissioning.
• New vacuum pumps for V-chambers: Tested in IYA. Test in IYV in the next week.
• Heater control: Pending.
• TMS: QPD in EX.

Discussion

VIS Meeting

Date: 2022/6/3 14:00-14:25

Participants: Takahashi, Uchiyama, Fabian, Aso, Tanaka, Ushiba, Washimi

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)