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⇤ ← Revision 9 as of 2025-11-21 10:56:30 →
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Editor: RyutaroTakahashi
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Size: 1364
Editor: RyutaroTakahashi
Comment:
Deletions are marked like this. Additions are marked like this.
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  * Sato-san is designing the fishing rod (FR). FRs will be necessary for the initial adjustment.   * Sato-san is designing the fishing rod (FR). FRs will be useful for the initial adjustment as well.

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: 2025/11/21 10:00-10:45

Zoom

Participants: Sato, Akutsu, Aso, Takahashi

Topics

Type-A

  • Oscillation of ITMX.

    • ITMX had a large oscillation around 1Hz due to the rubbing of the F3 keystone. The setpoints of F1 and F3 were changed (klog).

  • Height adjustment
    • Warming up will start on Dec. 8.
  • ACCs for the IP controls.
    • TF measurements of the folded pendulum are planned.
    • Preparing for three ACCs.

Type-B/Bp

  • IRM damper for Type-B.
    • Installation in SRM is scheduled on 3/9-19.
  • Enclosure for the SG card in an independent box.
    • Preparing for the boxes with a 1U rack panel.
  • IP for Type-Bp.
    • Started a design.

Type-C

  • Active isolation table for OMC.
    • The new geophone pod is assembled. A leak test should be performed.

    • The effect due to the evacuation of the TMS chamber was small (<20um). The effect due to the temperature change was large.

    • Sato-san is designing the fishing rod (FR). FRs will be useful for the initial adjustment as well.
  • Small Type-C suspensions with mini-GAS.

R&D

Discussion

  • The modification of the Type-A tower toward O6.

Next meeting

  • 2025/12/5 10:00-

KAGRA/Subgroups/VIS/VISMinutes20251121 (last edited 2025-11-21 10:57:59 by RyutaroTakahashi)