== FPC Meeting on 2019/03/08 13:00 - (JST) ==
Participants: Chunglee Kim, Kentaro Komori, Matteo Leonardi, Yuta Michimura, Atsushi Nishizawa, Kentaro Somiya, SH

Zoom meeting(2): https://zoom.us/j/6676627462

 * Next meeting will be around beg. April before f2f (doodle poll will be circulated).
 * [[LCGT/Meeting/f2f/2019Apr/FuSat|Satellite meeting of KAGRA Future Upgrades on April/18 at 13:30-]] 
 * [[KAGRA/KSC/FPC|Back to FPC page]]

== Action Items ==
 * Collecting the science part (Coordinated by Nishizawa, ... )
 * More detailed scoring of science cases (currently only factor of 2 or not)
 * Scoring the relevance to KAGRA and feasibility of each technology: [[https://gwdoc.icrr.u-tokyo.ac.jp/DocDB/0095/M1909590/005/Score_v2.2.xlsx|new version]] by KS, YM, SH, ML, KK
 * Sensitivity optimization
 * Fill-up the remaining part in Technology Survey coordinated by
   * Matteo : squeezing and filter cavity
   * Michimura : Low frequency related
   * Haino : Cryogenic and mirrors based on inputs
 * KAGRA sensitivity code management
   * Matteo: Integrating Michimura-san's python code with GWINC (JH) 
   * Update [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=2044|Noise spectrum of each technical noise]]
   * Review and check the squeezing parts (Matteo, Eleonora, ...)
 * Talks
   * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=9663|LVC meeting slides]] to be circulated, talk request already submitted to CPC
   * [[https://agenda.infn.it/event/15928/|GWADW, May/19-25]]

== Minutes ==
 * Review of science section (Nishizawa)[[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=9934|Slides]]
   * '''We are waiting for 9 topics for CBC and 3 for others'''
   * (Somiya) What is the frequencies of higher order ((3,3), (4,4)) bringdown modes ? => similar to the fundamental mode (2,2)
   * (Haino) The sensitivities in P.11 (Stellar oscillation) look strange => to be checked with the author
   * (Haino) Why KLF >> bK for BNS ? => Narrow band (like LF) can break the degeneracy for BNS
   * (Haino) '''More detailed scoring would help to evaluate which upgrade plans have more science cases => action item'''
 * Some new idea and discussion of sensitivity optimization (Haino) [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=9933|Slides]]
   * (Matteo) Why don't we try to combine 40kg and high power instead of FD squeezing ? => It can be also done, but the feasibility of 40kg mirror is still uncertain. So SH thought that FD squeezing is a bit more feasible at this stage.
   * (Matteo) Increasing the filter cavity length from 100m to 300m is just the scaling of cost, which we need a kind of technological jump from 30m to 100m. The longer filter cavity is more important for heavy mass upgrade option. 
   * (Somiya) Buonanno & Chen code (BnC) can also take account of finite SRC length by modifying the beta term
   * (Somiya) Why higher finesse is not preferred ? => The arm round trip loss (rtl) is more limiting the sensitivity with higher finesse
   * (Somiya) '''We should score each technology both in relevance to KAGRA and feasibility => action item'''
 * [[https://indico.ego-gw.it/event/12/|KIW5 (Feb./16)]] report (Michimura, Haino)
   * [[http://granite.phys.s.u-tokyo.ac.jp/michimura/presentation/labseminar_LIMMA2019KIW5.pdf|Report from Michimura-san in lab seminar]]
   * Close collaboration with Gianpietro (Geppo) Cagnoli at [[http://ilm.univ-lyon1.fr/?&lang=2|ILM]] for the possibility of large sapphire crystals.
 * FPC talk in [[https://cgca.uwm.edu/events/2019lvc|LVC meeting]] (Mar./18-21) (Haino)
   * Now talk is assigned at Instrument science plenary: [[https://dcc.ligo.org/cgi-bin/private/DocDB/DisplayMeeting?conferenceid=1022|Link to DCC (now accessible with KAGRA)]]
 * [[LCGT/Meeting/f2f/2019Apr/FuSat|Satellite meeting at f2f, Apr./18]]
   * We may ask to some FPC sub-groups (now a kind of sub-people) to give talks. We will also ask for contributed talks. 
 * [[https://agenda.infn.it/event/15928/|GWADW, May/19-25]]
   * A few from FPC will go there, we may ask for a few talks related with FPC ?
 * etc.
   * Some complains on the current format of references in the white paper. => At this stage we accept any kinds of reference formats and later on we will convert into one specific format.