Differences between revisions 1 and 11 (spanning 10 versions)
⇤ ← Revision 1 as of 2022-10-13 17:28:43 →
Size: 1489
Editor: RyutaroTakahashi
Comment:
← Revision 11 as of 2022-10-14 14:51:54 → ⇥
Size: 2915
Editor: RyutaroTakahashi
Comment:
Deletions are marked like this. Additions are marked like this.
Line 8: Line 8:
Date: 2022/10/14 13:00- Date: 2022/10/14 13:00-13:15
Line 10: Line 10:
Participants: Participants: Takahashi, Akutsu, Tomaru, Mitsuhashi, Ushiba, Uchiyama, Yokozawa, Aso, Miyoki, Hirata, Kimura, Ikeda
Line 22: Line 22:
 * Oplev:  * Oplev: Stabilization of the light source.
Line 24: Line 24:
 * Commissioning in vacuum: FPMI lock with low noise suspension controls.  * Commissioning: FPMI lock with low noise suspension controls.
Line 26: Line 26:
 * Vacuum system: Reak test in BS. Pump down of the TMSY from 10/12.  * Vacuum system: Reak test in BS was finished. Pump down of the TMSY was started on 10/12. Leak test in IMM, IFI, PRs, and TMSY in the next week.
Line 34: Line 34:
Date: 2022/10/14 14:00- Date: 2022/10/14 14:00-14:20
Line 36: Line 36:
Participants: Participants: Takahashi, Uchiyama, Fabian, Lucia, Washimi, Tanaka, Ushiba, Aso
Line 40: Line 40:
 * Offloaded the GAS filters in IX.
 * Testing the heater control in IY.
Line 41: Line 44:
 * BS sensor correction implemented. It seems to be working fine. Noise budget and a deeper analysis of its performance are ongoing.
 * In BS too, tentative blending filters could be implemented and tested next week.
 * I tracked down the location of the data used for the calibration of BS geophones. I'll do the calibration again, just for our information.
 * I compared the geophone outour in SRM, SR2 and SR3. They are all similar but there are differences. I'll check again next week.
 * In SR2, I did IP LVDT and actuator diagonalization. The difficulty is that the resonance frequencies in L and T are both very close to 66 mHz. Some coupling reduced, but from Y to T, actuation coupling increased to 20% of the resonance in T. I want to revert to previous values of the diagonalization matrices.
Line 42: Line 50:
 * PRM: mechanical suspension models of TM have been uploaded on the filter banks.
 * Control filters for strong damping is ready to be tested next week
Line 44: Line 54:
 * Prototyping the geophone pre-amp.
Line 48: Line 60:
 * Type-B: IP control.
 * Type-Bp: 		 * Type-B: Optimization of IP controls.
 * Type-Bp: Test of filters.
Line 60: Line 72:
 * Hirata:  * Hirata: 10/18-21
 * Sato: 10/18-21
Line 69: Line 82:
 * 2022/10/21(FRI)  * 2022/10/21(FRI) 13:30

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: 2022/10/14 13:00-13:15

Participants: Takahashi, Akutsu, Tomaru, Mitsuhashi, Ushiba, Uchiyama, Yokozawa, Aso, Miyoki, Hirata, Kimura, Ikeda

Post O3 Upgrade portal

Schedule

  • Type-A: Offload of the GAS filters in IX. Test of the heater control in IY.
  • Type-B: Diagonalization of the IP in BS/SR2. Sensor correction in BS.
  • Type-Bp:
  • Type-C:

Status

  • Replacement of cables: EXT remains.
  • Oplev: Stabilization of the light source.
  • ACC: Evaluation.
  • Commissioning: FPMI lock with low noise suspension controls.

  • Acceptance check: DropboxPaper

  • Vacuum system: Reak test in BS was finished. Pump down of the TMSY was started on 10/12. Leak test in IMM, IFI, PRs, and TMSY in the next week.
  • Heater control: Test in IY.
  • TMS: Evacuation of TMSY.

Discussion

VIS Meeting

Date: 2022/10/14 14:00-14:20

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

Summary Report

Type-A

  • Offloaded the GAS filters in IX.
  • Testing the heater control in IY.

Type-B

  • BS sensor correction implemented. It seems to be working fine. Noise budget and a deeper analysis of its performance are ongoing.
  • In BS too, tentative blending filters could be implemented and tested next week.
  • I tracked down the location of the data used for the calibration of BS geophones. I'll do the calibration again, just for our information.
  • I compared the geophone outour in SRM, SR2 and SR3. They are all similar but there are differences. I'll check again next week.
  • In SR2, I did IP LVDT and actuator diagonalization. The difficulty is that the resonance frequencies in L and T are both very close to 66 mHz. Some coupling reduced, but from Y to T, actuation coupling increased to 20% of the resonance in T. I want to revert to previous values of the diagonalization matrices.

Type-Bp

  • PRM: mechanical suspension models of TM have been uploaded on the filter banks.
  • Control filters for strong damping is ready to be tested next week

Type-C

Electronics

  • Prototyping the geophone pre-amp.

Control

Schedule

  • Type-A: Investigation of ACCs.
  • Type-B: Optimization of IP controls.
  • Type-Bp: Test of filters.
  • Type-C:

Safety

Discussion

Travel Plans

(Date in Kamioka)

The week from 10/17

  • Takahashi: 10/17-19
  • Hirata: 10/18-21
  • Sato: 10/18-21

The week from 10/24

  • Takahashi:
  • Hirata:
  • Sato:

Next meeting

  • 2022/10/21(FRI) 13:30

KAGRA/Subgroups/VIS/VISMinutes20221014 (last edited 2022-10-14 14:51:54 by RyutaroTakahashi)