= Simulation meeting 2021 Dec 09 15:00 =
Zoom2: https://zoom.us/j/6676627462

== Participants ==
Naoki Koyama, Matteo Leonardi, Yoichi Aso, Tomotada Akutsu, Haoyu Wang


== Agenda ==

This is the last meeting in 2021. The next meeting will be organized in 2022.

=== Updates from Projects ===
 * Birefringence
   * Slide for updates [[ https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=13335|link]]
   * We heard from Hirose-san that there are markers on ITMs when TWE maps are measured. These markers can be used to recover the rotation angle.
   * We need to confirm with Hirose-san that if HR surface figure errors are included or excluded in TWE maps.
   * We can almost match the MZ model with the single bounce mode. But we need to be careful as the alpha-minus map contains high frequency spatial mode.
   * Haoyu is going to give a talk for updates of birefringence characterization and simulation in F2F meeting.
   * Matteo-san would like to calculate the birefringence parameters of the spare ETM in NAOJ.

 * GUI
   * Koyama-san is calculating fields in PRCs.

 * Other things:
   * We will have a meeting next week in Kamioka site with Aso-san and Marc about developing KAGRA FINESSE file including the filter cavity.