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⇤ ← Revision 1 as of 2025-04-10 18:05:26 →
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Editor: RyutaroTakahashi
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Editor: RyutaroTakahashi
Comment:
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Date: 2025/4/11 10:00- Date: 2025/4/11 10:00-11:00
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Participants: Participants: Aso, Akutsu, Sato, Takahashi, Miyoki
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  * Evaluation of the FLDACC is ongoing with DGS in ATC. The present status is here.   * Evaluation of the FLDACC is ongoing with DGS in ATC. The present status is [[https://www.dropbox.com/scl/fi/ls12u2sk0lj7udw7079w5/FLDACCtest.pdf?rlkey=pdnukiczt8qmkn4i4t6b7buh2&dl=0|here]].
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  * Tanaka-san made a prototype box. It is better to mount a 1U pannel like [[https://www.monotaro.com/p/8834/8145/|this]].   * Tanaka-san made a prototype box. 1U panel will be prepared to mount the box.
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  * We have asked ATC about the design of the IRM damper as the item in 2025FY. Conceptual design is [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=16608|here]]. Actuator noise should be estimated by comparing it with the OSEM.   * 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]]. The inner diameter of the coil bobbin should be larger (than 20mm).
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  * The new geophone pre-amp boards had a problem.   * The new geophone pre-amp boards had a [[https://www.dropbox.com/scl/fi/csxmxrkevz6pwt3z9r142/Choke-2R2-_0001_0001.pdf?rlkey=ymmi9u4h66etxsetqmffu7qq5&dl=0|problem]].

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: 2025/4/11 10:00-11:00

Zoom

Participants: Aso, Akutsu, Sato, Takahashi, Miyoki

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. The inner diameter of the coil bobbin should be larger (than 20mm).

  • 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)