= Simulation meeting 2022 Mar 31 15:00 =
Zoom2: https://zoom.us/j/6676627462

== Participants ==
Marc Eisenmann, Naoki Koyama, Haoyu Wang, Yuhang Zhao

== Agenda ==

=== Updates from Projects ===

 * Birefringence simulation
   * The p-pol beam shape was measured in KAGRA. [[ https://klog.icrr.u-tokyo.ac.jp/osl/?r=20103|klog 20103]]
   * We try our best to calibrate the TWE maps and compare the beam shape simulation with the measurement. [[ https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=14009|caliTWE]]
   * Offset, tilt and centering can largely influence our birefringence maps. We are not sure how much error is there in Hirose-san's TWE measurements.
   * We remove the gravity induced deformation in the TWE maps.

 * Future plan
   * Measure p-pol beam shape for ITMY.
   * Measure power of s/p pol beam and arm cavity round trip loss.
   * Measure p-pol beam shape vs. beam position on ITMs