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⇤ ← Revision 1 as of 2025-05-30 15:47:55 →
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   * DONE
   * 20250530_RFQPD and RFPD Optical Layout of REFL Port_2D https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=16702
   * 20250530_OMC chamber 3D drawing https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=16705
   * Found new issue that height of ORM1 is not consistent
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   * Beam layout in the CAD drawing Sato-san provided is based on the design, but the position of the optics are based on the actual locations as installed. https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=16678
   * So, ORM6 situation should be fine.
   * As for the height of ORM1, this is due to the base of OFI. Just need to adjust the height of the pedestal.
   * Also ,ORM1 also need to be 1-inch optic (currently, it is 0.5-inch in the drawing).
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   * ALIGO IO L1 IN VACUUM INPUT PERISCOPE ASSEMBLY https://dcc.ligo.org/LIGO-D1002350
   * ISC TransMon Periscope Lens Bracket https://dcc.ligo.org/LIGO-D1003296/public
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   * See last two pages: https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=16178

In-vac PD/QPD layout meeting 2025/05/30

Time: May 30, 2025 14:00-14:40

Participants: Huali Chen, Ryan Yang, Yoichi Aso, Yuta Michimura

Zoom meeting

Minutes

  • REFL (Ryan)
    • In-air layout basically complete.
    • Need to update the following:
      • Remove in-vac periscope and add in-air periscope
      • Make in-air path parallel to the grid of M6 screw holes of the optical table
    • Current periscope changes the height by 92.4 mm to make the in-air beam height to be 4 inch
    • Need to start designing the vacuum tank
  • AS (Ryan)
    • Included new optical layout in the CAD drawing.
    • 0.5 inch optics and 2 inch lens need to be modified to 1 inch. Use 1 inch for all.
    • Basically OK, but ORM6 interferes with a foot of OMC shroud. Need to be discussed with relevant people.
      • Slightly modify OMC REFL pick-off mirror angle, or modify OMC shroud or modify ORM6 pedestal
    • Periscope for in-vac layout in OMC tank needs to be designed.

      • Height change 210 mm -> 1 inch

    • Periscopes, beam diverters, RF QPDs, optical bench need to be designed.
  • POP (Yuta)
    • Need to collect information for start designing things.

  • A/I

  • Next meeting: TBD on the week of June 23 ?

KAGRA/subgroup/ifo/MIF/Minutes20250530 (last edited 2025-06-23 14:30:50 by YutaMichimura)