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Date: 2022/1/7 13:00- Date: 2022/1/7 13:00-13:30
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Participants: Participants: Takahashi, Ikeda, Yokozawa, Uchiyama, Aso, Hirata, Sato, Ushiba, Tomaru, Akutsu
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 * IX: Investigating the glich in the F3 signals. Go to the health check.  * IX: Go to the health check. Investigating the glitch in the F3 signals.
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 * EY: Implementing the damping controls. Repair of F0 actuator. Preparation of ACCs.  * EY: Implementing the damping controls. Repair of F0 actuator. Preparation for ACCs.
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 * Replacement of flip cables: SR2  * Replacement of flip cables: SR2 was finished. SRM is on going. Cables for Type-C will be delivered in the end of Jan.
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 * Commissioning in air: Return of GRY.  * Commissioning in air: Return of GRY. Alignment of SR3 is planed in the next week.
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 * New vacuum pumps for V-chambers:
 * Heater control: IXV/EXV
 * Power source for Oplev:		  * New vacuum pumps for V-chambers: Cabling of the power line in IXV/EXC is planed on 1/11-12.
 * Heater control: Test in IXV/EXV is planed. Repaired power controller will be delivered soon.
 * Power source for Oplev: EY oplev was recovered.
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Participants:  Participants:
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 * Preparing for the accelerometers in EY.
 * Repaired the actuator coil for F0 in EY.
 * Investigating the glitch of F3 signals in IX. The problem is in the DGS side.

==== ETMY ====
 * IP controls implemented.
 * F1, BF GAS, BF L control loops cannot be closed. They exhibit unstable behavior, not sure why. I need more time to investigate.
 * I centered the BF yaw and TM yaw with the F0 stepper motor and BF yaw pico motor.
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==== BS ====
 * We made a rough test of the optical displacement sensor on the optical table; it seems to be working fine. We plan to calibrate F1 LVDT next week because they won't use the laser.
 * In the F1 LVDT adapter box, we exchanged places of the cables connected to pins 2 and 7 in the connector for the cable that goes to the vacuum chamber (primary coil used as a readout coil). This should fix the polarity. We didn't test the modified circuit because of DGS maintenance.

==== Others ====
 * SR2: we finished changing flip adapters.
 * SRM: we changed flip adapters in two flanges.

==== SR3 ====
 * I found a potential cause of the 0.2 Hz yaw oscillation during green alignment to Y-end. It's possibly due to the IP controls. I will redo the controls for SR3 during the weekend.
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==== PRM ====
 * We fixed a broken connection in IM-H2 OSEM cable. We had to replace the whole connector because the pin was jammed. We used to muiltimeter to check the connections were healthy.
 * In PR suspensions there are many connectors that are just hanging. Failure in connections is problem which is likely going to happen again. There are some ideas on how to install cable clamps but we need time and discussion.
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 * Type-B team:   * Type-B team:
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 * The zipper to open/close the roof of the clean booth has been broken in EY. The hook of the crane caught the zipper when the crane was working.

Contents

  1. Agenda/Minutes
  2. CRY+VIS Interface Meeting
    1. Schedule
    2. Status
    3. Discussion
  3. VIS Meeting
    1. Summary Report
      1. Type-A
      2. Type-B
      3. Type-Bp
      4. Type-C
      5. Electronics
      6. Control
    2. Schedule
    3. Safety
    4. Discussion
    5. Travel Plans
    6. Next meeting

Agenda/Minutes

Zoom Meeting

CRY+VIS Interface Meeting

Date: 2022/1/7 13:00-13:30

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

Post O3 Upgrade portal

Schedule

  • IX: Go to the health check. Investigating the glitch in the F3 signals.
  • EX: Go to the health check.
  • IY:
  • EY: Implementing the damping controls. Repair of F0 actuator. Preparation for ACCs.

Status

  • Replacement of flip cables: SR2 was finished. SRM is on going. Cables for Type-C will be delivered in the end of Jan.
  • TM height setting: ITMY.
  • Oplev: Setup of the TM Oplev in IY after the TM alignment.
  • ACC: Experiments in IX/EX. Preparation for EY.
  • Commissioning in air: Return of GRY. Alignment of SR3 is planed in the next week.
  • Commissioning in vacuum:
  • Overall commissioning:
  • Acceptance check:
  • PF actuator: At the in-vacuum commissioning.
  • New vacuum pumps for V-chambers: Cabling of the power line in IXV/EXC is planed on 1/11-12.
  • Heater control: Test in IXV/EXV is planed. Repaired power controller will be delivered soon.
  • Power source for Oplev: EY oplev was recovered.

Discussion

VIS Meeting

Date: 2022/1/7 14:00-

Participants:

Summary Report

Type-A

  • Preparing for the accelerometers in EY.
  • Repaired the actuator coil for F0 in EY.
  • Investigating the glitch of F3 signals in IX. The problem is in the DGS side.

ETMY

  • IP controls implemented.
  • F1, BF GAS, BF L control loops cannot be closed. They exhibit unstable behavior, not sure why. I need more time to investigate.
  • I centered the BF yaw and TM yaw with the F0 stepper motor and BF yaw pico motor.

Type-B

BS

  • We made a rough test of the optical displacement sensor on the optical table; it seems to be working fine. We plan to calibrate F1 LVDT next week because they won't use the laser.
  • In the F1 LVDT adapter box, we exchanged places of the cables connected to pins 2 and 7 in the connector for the cable that goes to the vacuum chamber (primary coil used as a readout coil). This should fix the polarity. We didn't test the modified circuit because of DGS maintenance.

Others

  • SR2: we finished changing flip adapters.
  • SRM: we changed flip adapters in two flanges.

SR3

  • I found a potential cause of the 0.2 Hz yaw oscillation during green alignment to Y-end. It's possibly due to the IP controls. I will redo the controls for SR3 during the weekend.

Type-Bp

PRM

  • We fixed a broken connection in IM-H2 OSEM cable. We had to replace the whole connector because the pin was jammed. We used to muiltimeter to check the connections were healthy.
  • In PR suspensions there are many connectors that are just hanging. Failure in connections is problem which is likely going to happen again. There are some ideas on how to install cable clamps but we need time and discussion.

Type-C

Electronics

Control

Schedule

See Schedule

  • Type-A team: ACC in EY, Heter test in IXV/EXV
  • Type-B team:

Safety

  • The zipper to open/close the roof of the clean booth has been broken in EY. The hook of the crane caught the zipper when the crane was working.

Discussion

Travel Plans

(Date in Kamioka)

The week from 1/11

  • Takahashi: 1/12-14
  • Sato: 1/12-14
  • Hirata: 1/12-14

The week from 1/17

  • Takahashi: 1/17-21
  • Sato: 1/17-21
  • Hirata: 1/17-21

Next meeting

  • 2022/1/14(FRI)

KAGRA/Subgroups/VIS/VISMinutes20220107 (last edited 2022-01-07 14:33:00 by RyutaroTakahashi)