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  * We have asked ATC about the design of the IRM damper as the item in 2025FY. Updated design is [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=16608|here]].   * We have asked ATC about the design of the IRM damper as the item in 2025FY. The updated conceptual design is [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=16608|here]].


VIS Meeting

Date: 2025/4/11 10:00-

Zoom

Participants:

Topics

Type-A

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

Type-B/Bp

  • Enclosure for the SG card into an independent box.
    • Tanaka-san made a prototype box. 1U panel will be prepared to mount the box.
  • Yaw damper for Type-B.
    • We have asked ATC about the design of the IRM damper as the item in 2025FY. The updated conceptual design is here.

  • IP for Type-Bp.

Type-C

  • Active isolation table for OMC.
    • Sato-san performed the FEM analysis on breadboard thickness.
    • The new geophone pre-amp boards had a problem.

    • It isn't easy to purchase L4-C geophones.
  • Vibration in the IFI chamber
  • Small Type-C suspensions with mini-GAS.

R&D

Discussion

Next meeting

  • 2025/4/25 10:00-

KAGRA/Subgroups/VIS/VISMinutes20250411 (last edited 2025-04-11 11:04:50 by RyutaroTakahashi)