• KAGRA
• Subgroups
• VIS
• VISMinutes20250328

VIS Meeting

Date: 2025/3/28 10:00-

Zoom

Participants:

Topics

Type-A

• ACCs for the IP controls.
  • Evaluation of the ACC is ongoing with DGS in ATC.

Type-B/Bp

• Enclosure for the SG card into an independent box.
  • Tanaka-san is making a prototype.
• Yaw damper for Type-B.

  • We asked ATC about the design of the IRM damper as the item in 2025FY. Conceptual design is here.

• IP for Type-Bp.

Type-C

• Active isolation table for OMC.
  • Akutsu-san closs-checked the model with the Mathematica code. Jacks under the support bellows may be necessary to adjust the height of the table.
  • The new geophone pre-amp boards had a problem. The power lines were grounded.
• Vibration in the IFI chamber
  • The geophone pod was assembled and passed the leak check, but we gave up on installing it.
  • The STM2 was successfully fixed on 26th.
• Small Type-C suspensions with mini-GAS.

R&D

Discussion

Next meeting

• 2025/4/10 10:00-