ISC Meeting for ASC Strategies 2021/08/16 13:00 - 15:00

Participants: Shinji Miyoki, Naoki Koyama, Osamu Miyakawa, Terrence Tak Lun Tsang, Yoichi Aso, Tatsuki Washimi, Chiaki Hirose, Takafumi Ushiba, Kenta Tanaka, Marc Eisenmann, Hirotaka Yuzurihara, Yuta Michimura

Zoom meeting: https://zoom.us/j/5045179604

Your time zone: https://www.timeanddate.com/worldclock/fixedtime.html?iso=20210816T0400

Next meeting

TBD

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Minutes

Agenda

• External review next week! August 24, 2021 22:00-0:00 (JST)
• Requirements for local damping summarized

  • ITMs and ETMs (Type-A): <240 um/sec, <0.1 urad RMS

  • BS (Type-B): <1.6 um/sec, <1 urad RMS

  • SRs (Type-B): <0.44 um/sec, <1 urad RMS

  • PRs (Type-Bp): <7.3 um/sec, <1 urad RMS

  • References:

    • K. Okutomi PhD thesis (Table 3.5) JGW-P1809347

    • T. Sekiguchi PhD thesis (Table 5.2) JGW-P1504155

    • Y. Michimura et al (Section 6) Classical and Quantum Gravity 34, 225001 (2017)

• Possibility of shortening Xarm and Yarm commissioning?

  • http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Subgroups/MIF/ExternalReview2021#agenda2

  • Latest schedule: https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=9209

  • Strategy for the arm cavity commissioning while the central area is open
    • Should we adjust the position of the PR2 and PR3 to improve the mode matching to the arms at Xarm/Yarm commissioning periods? Or after the center area is evacuated?
• What we want to ask the reviewers?
• IMC ASC report? (Kenta, Chiaki)
  • To be discussed at the IMC ASC weekly on Wednesday