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Editor: RyutaroTakahashi
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  * Investigating the effects of cabling for the geophones ([[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=16645|report]]).   * Investigating the effects of cabling and pre-amps for the geophones ([[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=16645|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: 2025/9/26 10:00-

Zoom

Participants:

Topics

Type-A

  • ACCs for the IP controls.

    • Evaluating the FLDACC with DGS in ATC (report). Noise budget should be made.

Type-B/Bp

  • IRM damper for Type-B.
    • Hirata-san assembled the delivered parts.
  • Enclosure for the SG card in an independent box.
    • The prototype box was mounted in the 1U rack.
  • IP for Type-Bp.
    • Started a design.

Type-C

  • Active isolation table for OMC.
    • New geophone (SM-700C) was delivered on Sep. 18.
    • The new geophone pod has been ordered.

    • Investigating the effects of cabling and pre-amps for the geophones (report).

    • The effects due to the tilt of the table were checked. The gap in the IRM should be larger.
    • The height of the OMMT1 will be changed from 21cm to 20cm.
  • Small Type-C suspensions with mini-GAS.

R&D

Discussion

Next meeting

  • 2025/9/26 10:00-

KAGRA/Subgroups/VIS/VISMinutes20250926 (last edited 2025-10-09 16:31:22 by RyutaroTakahashi)