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Editor: RyutaroTakahashi
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Date: 2023/2/17 13:00- Date: 2023/2/17 13:00-13:10
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Participants: Participants: Takahashi, Mitsuhashi, Ikeda, Sato, Kimura, Miyoki, Aso, Yasui, Hirata, Yokozawa, Ushiba
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 * Type-A: Coil driver for ACCs in EY.  * Type-A: Investigation of ACCs in EY.
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 * ACC:  * ACC: Replacement of the coil driver in EY was postponed.
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 * Vacuum system:  * Vacuum system: Switched from the TMP to the ISP in SRM.
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 * Replacement of the coil driver for ACCs in EY was postponed. A strange peak in the signal of ACC only is observed at 0.02Hz ([[https://klog.icrr.u-tokyo.ac.jp/osl/?r=23854|klog]]).
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 * PR3: I calculated the inter-calibration factor between the seismometer on ground and the BF Damper in L.
 * PR2: I tried to do the same for PR2, but the data is very noisy, and I was not able to get a reliable transfer function fit. It would be useful to get data with higher coherence.
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 * Tested a prototype pre-amp board for geophones using the spare geophone pod and the geophone distributor. The prototype board had the noise floor higher than the Nikhef one by one order at 1Hz ([[https://klog.icrr.u-tokyo.ac.jp/osl/?r=23996|klog]]).
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 * Hirata: 2/22

The week from 2/27

 * Aso: 2/27-28

Contents

  1. Agenda/Minutes
  2. CRY+VIS Interface Meeting
    1. Status
    2. Other items
    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: 2023/2/17 13:00-13:10

Participants: Takahashi, Mitsuhashi, Ikeda, Sato, Kimura, Miyoki, Aso, Yasui, Hirata, Yokozawa, Ushiba

Acceptance check document

Status

  • Type-A: Investigation of ACCs in EY.
  • Type-B:
  • Type-Bp: Sensor correction in PR3.
  • Type-C:

Other items

  • Oplev:
  • ACC: Replacement of the coil driver in EY was postponed.
  • Commissioning:
  • Vacuum system: Switched from the TMP to the ISP in SRM.
  • Heater control:
  • TMS: Covering in TMSY on 2-3 March.

Discussion

VIS Meeting

Date: 2023/2/17 13:30-

Participants:

Summary Report

Type-A

  • Replacement of the coil driver for ACCs in EY was postponed. A strange peak in the signal of ACC only is observed at 0.02Hz (klog).

Type-B

Type-Bp

  • PR3: I calculated the inter-calibration factor between the seismometer on ground and the BF Damper in L.
  • PR2: I tried to do the same for PR2, but the data is very noisy, and I was not able to get a reliable transfer function fit. It would be useful to get data with higher coherence.

Type-C

Electronics

  • Tested a prototype pre-amp board for geophones using the spare geophone pod and the geophone distributor. The prototype board had the noise floor higher than the Nikhef one by one order at 1Hz (klog).

Control

Schedule

  • Type-A: IP control with ACCs.
  • Type-B/Bp: Sensor correction for PR3 and PR2.
  • Type-C:

Safety

Discussion

Travel Plans

(Date in Kamioka)

The week from 2/20

  • Hirata: 2/22

The week from 2/27

  • Aso: 2/27-28

Next meeting

  • 2023/2/24(FRI) 13:30-

KAGRA/Subgroups/VIS/VISMinutes20230217 (last edited 2023-02-19 14:21:05 by RyutaroTakahashi)