• KAGRA
• subgroup
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• Minutes20250422

In-vac PD/QPD layout meeting 2025/04/22

Time: Apr 22, 2025 14:00-

Participants: Ray-Kuang Lee, Huali Chen, Ryan Yang, Yoichi Aso, Yuta Michimura

Zoom meeting

Minutes

• AS (Huali)

  • Updated layout in JGW-G2516616

  • We will need to add a fast beam shutter between OFI and OSTM
  • We will need to design a beam diverter and RF QPDs based on LIGO design
  • We will need to make this a 3D CAD model
    • Need to design pedestals, periscopes, optical bench etc.
• REFL (Ryan)

• A/I

  • Reduce the size of the breadboard to 800 mm dia, and add RF PD layout for REFL [Ryan]
  • Slightly update the layout to have more space between AS RF beam and OMC REFL RF QPD [Huali]
  • Check IFI chamber layout if POM2 the beam is hitting the center of POM2 [Michimura]
• Next meeting: TBD on the week of June 26 ?