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Somiya, Wang, Kokeyama, Koyama, Hirose
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 * Birefringence modeling (Haoyou)
    * Model where a BS splitting S and P (Somiya model)
      * Haoyu rose an interesting question if this BS-birefringence model can really simulate the real S and P fields or not. Sinsce "i" is added when the EM fields transmit the BS, using a BS to split S and P pols, there are sign flips inside the S-P coupled cavity model. See, his [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=11792|note]], especially page 4. The P-pol cavity (P-PRM) field going back to the S-pol cavity (S-PRM) gets -1 (two transmissions at BS, therefore i*i), which is the flipped sign compared with the S field inside the S-PRM cavity. Isn't that not true for our ITM birefringence mirror?
      * How the relative phase between S and P are when they transmit and reflect in reality? Are there only phase delay on the mirror surface? Can the energy be conserved in that case? Or do one of S or P actually have to have phase flip compared with the other?
      * We will have to understand the reality to evaluate the simulation.
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 * Birefringence modeling (Haoyou)
 * OMC modeling (June Gyu)
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   * They made a first GUI box to put a optical parameter to pass to a finesse model.
   * [[KAGRA/Subgroups/MIF/Simulation/KamikokaActivity20200817 | Activity log]]

Simulation meeting 2020 Aug 19, 15:00-

Participants

Somiya, Wang, Kokeyama, Koyama, Hirose

Agenda

Updates from Projects

  • Birefringence modeling (Haoyou)
    • Model where a BS splitting S and P (Somiya model)

      • Haoyu rose an interesting question if this BS-birefringence model can really simulate the real S and P fields or not. Sinsce "i" is added when the EM fields transmit the BS, using a BS to split S and P pols, there are sign flips inside the S-P coupled cavity model. See, his note, especially page 4. The P-pol cavity (P-PRM) field going back to the S-pol cavity (S-PRM) gets -1 (two transmissions at BS, therefore i*i), which is the flipped sign compared with the S field inside the S-PRM cavity. Isn't that not true for our ITM birefringence mirror?

      • How the relative phase between S and P are when they transmit and reflect in reality? Are there only phase delay on the mirror surface? Can the energy be conserved in that case? Or do one of S or P actually have to have phase flip compared with the other?
      • We will have to understand the reality to evaluate the simulation.
  • IFO modeling

    • Note on FPMI

      • Done (one disagreement in the matrices)
      • Comparison v.s. analytical calculation

    • Note on PRFPMI

      • Mostly done (a few disagreement in the matrices)
    • DRFPMI model
      • kat and jupyter notebook are on git, to be tested
    • Include the higher order modes (FPMI, PRFPMI, DRFPMI)
      • Haven't started
  • Simulation Interface
    • Yuzu-san, Hirose-san, Koyama-san are visiting Kamioka
    • They made a first GUI box to put a optical parameter to pass to a finesse model.

    • Activity log

KAGRA/Subgroups/MIF/Simulation/SimMeeting20200819 (last edited 2020-08-26 14:45:15 by haoyu.wang)