• KAGRA
• subgroup
• ifo
• MIF
• Minutes20210713

ISC Meeting for External Review Preparations on 2021/07/13 15:00 - 16:00

Participants: Tomotada Akutsu, Yoichi Aso, Shinji Miyoki, Kiwamu Izumi, Kenta Tanaka, Chiaki Hirose, Yuta Michimura

Zoom meeting: https://zoom.us/j/6676627462

Your time zone: https://www.timeanddate.com/worldclock/fixedtime.html?iso=20210713T0600

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Minutes

• External Review candidate dates
  • To be determined by Densuke
• External Review topics
  • Materials for the review will be distributed in advance of the review
  • Misunderstandings between ourselves in what is technical and what is management
  • Better to show what are the current issues recognized by ourselves and our planned means to solve them
    • With a Gantt chart including uncertain points
  • Topics for the External Review
    • Daily alignment
    • ASC commissioning and simulations
      • Including reports from the site, by Kenta Tanaka and Chiaki Hirose.
    • Gantt chart for O4 (if possible)

• Action Items

  • Determine the review date
  • Hold a meeting to summarize current WFS commissioning/simulation situations
  • Ask what is the situation with FINESSE GUI development

Agenda

• External Review candidate dates
  • 2021 August 3, 4, 5, 10, 11, 24, 25, 26
• External Review topics
  1. How to perform the daily alignment of IFO

     • Summary of alignment scheme in O3GK to RSE trial https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=12594

     • We can present our improvement plans and also ask for further improvements necessary
  2. Simulation of WFS
     • IMC ASC closed but with larger noise and was turned off during O3GK.
     • IFO ASC not commissioned well. Too dirty beams.

       • https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=11687

       • https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=11061

       • https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=10996

     • IFO ASC simulations so far

       • BRSE, PRFPMI, SRFPMI, FPMI https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=10359

       • PRMI, DRMI simulations necessary
     • Report on FINESSE simulation on IMC ASC by C. Hirose
     • Probably better to be reported by site people
       • What is the status of ASC simulations and commissioning? PRMI and DRMI?
       • FPMI

         • https://klog.icrr.u-tokyo.ac.jp/osl/?r=12133

         • https://klog.icrr.u-tokyo.ac.jp/osl/?r=11869

         • https://klog.icrr.u-tokyo.ac.jp/osl/?r=11641

         • https://klog.icrr.u-tokyo.ac.jp/osl/?r=11543

         • https://klog.icrr.u-tokyo.ac.jp/osl/?r=11537

  3. How to close ASC loops during the lock acquisition process
     • No idea
  4. How to use local sensors, WFS signals and BPC, etc. to enhance stability and to minimize noise contribution
     • No idea
     • Probably better to be reported by suspension commissioning team