In-vac PD/QPD layout meeting 2025/11/26
Time: 14:00-14:30
Participants: Huali Chen, Ryan Yang, Ray-Kuang Lee, Yoichi Aso, Yuta Michimura
Zoom meeting
Minutes
- POP design (Ryan)
- POP in-vac/in-air design completed
- POP Forward in-air design needs to be updated to use DC QPD instead of RF QPD.
Lenses for POP forward beam can be found here: https://gwdoc.icrr.u-tokyo.ac.jp/DocDB/0096/T1909623/009/20220407_KAGRA_POP.svg
- Green X design needs to be updated to avoid conflict between the chamber
- Lens information needed
- In-vac periscope (Ryan)
New design following LIGO-D1002350 is ongoing.
- The top mirror height is 200 mm, and the lower mirror height will be 4 inch - 15 mm.
- Mirror holder
A/I
- Consult with VAC people to start designing REFL/POP PD tank [Yuta]
- Send Ryan information on lenses for the POP table [Yuta]
- Design a new periscope with 2 inch mirrors fixed on plates (not mirror mounts) on a rectangular structure. [Ryan]
- Upload the current version for comments [Ryan]
- Check the resonant frequencies with FEM [Ryan]
- Re-adjust the OMC chamber layout based on the new periscope design [Ryan]
- Get a quote [Ryan]
- Design a base plate for OMC chamber
- What to do with a beam diverter?
- Next meeting: TBD
