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  * The design of the IRM damper is ongoing by Hirata-san. The updated design is [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=16608|here]]. The efficiency of the actuator was measured ([[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=16608|report]]).   * The design is ongoing by Hirata-san. The updated design is [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=16608|here]]. The efficiency of the actuator was measured ([[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=16608|report]]).

Contents

  1. VIS Meeting
    1. Topics
      1. Type-A
      2. Type-B/Bp
      3. Type-C
      4. R&D
    2. Discussion
    3. Next meeting

VIS Meeting

Date: 2025/5/23 10:00-

Zoom

Participants:

Topics

Type-A

  • ACCs for the IP controls.

    • Evaluation of the FLDACC with DGS in ATC is ongoing. The present status is here.

Type-B/Bp

  • IRM damper for Type-B.

    • The design is ongoing by Hirata-san. The updated design is here. The efficiency of the actuator was measured (report).

  • Enclosure for the SG card in an independent box.
    • Tanaka-san made a prototype box. A 1U panel was prepared to mount the box.
  • IP for Type-Bp.

Type-C

  • Active isolation table for OMC.
    • The review was held on May 8th.

    • The new geophone pre-amp. was evaluated (report).

    • We are finding a substitute for the L4-C geophone. There are some candidates ([[|report]]).
  • Small Type-C suspensions with mini-GAS.

R&D

Discussion

Next meeting

  • 2025/6/6 10:00-

KAGRA/Subgroups/VIS/VISMinutes20250523 (last edited 2025-05-23 11:22:06 by RyutaroTakahashi)