• KAGRA
• KSC
• FPC
• Meetings
• 190205

FPC Meeting on 2019/02/05 15:00 - 16:10 (JST)

Participants: Eleonora Capocasa, Kentaro Komori, Matteo Leonardi, Yuta Michimura, Atsushi Nishizawa, Kentaro Somiya, SH Chunglee Kim

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

• Next meeting will be around end/Feb (doodle poll will be circulated).

• Back to FPC page

Action Items

• Re-organize the white paper sections(SH) => (being) done

• Collecting the science part (Coordinated by Nishizawa, ... )
• 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

  • Update Noise spectrum of each technical noise

  • Review of KAGRA code with GWINC (SH - with some help by others - also for the OSP issues)
  • Review and check the squeezing parts (Matteo, Eleonora, ...)
• Talks
  • KIW5 slides to be circulated in FPC (SH), talk request already submitted to CPC
  • LVC meeting, talk request already submitted to CPC

Minutes

• Frequency dependent squeezing in KAGRA by Eleonora and Matteo

  • ~100m scale filter cavity seems necessary but not much improvement above ~300m
  • Code unification (NAOJ-Matlab(Kwee paper), GWINC, KAGRA-Matlab) at the squeezing part would be necessary to produce the "official" plots and discussions
  • The first step of the white paper is to make some suggestions on the filter cavity length (VS physics merits) and input to SEO for more practical consideration (FPC should also provide other inputs)

• KIW5 at Perugia

  • Michimura, Eleonora, SH will join from FPC
  • SH will give FPC overview talk (slides to be circulated to FPC and CPC), Eleonora will give the FD-squeezing talk (chaired by Michimura)
  • Listing-up possible collaboration works between KAGRA and ET and asking for their response (e.g. detailed PI calculation)

• LVC meeting

  • Matteo commented that it is good to get some suggestions from LV
  • SH contacted Brian Lantz and Stefan Hild and got encouragement. SH will submit a request to CPC
• White paper
  • A bit of re-organization of sections
  • Sections for (Current and new) noise sources and technology survey
  • We should have up-to-date KAGRA Technical Design Report, TDR (either in white paper or in a separate document)
  • The facility limitation should be discussed anyway in addition to KAGRA TDR

  • Interface control document exists but needs to be updated

Agenda

• Slides

• Current progress of the white paper

  • Current version

  • Science still waiting; at least highlights can be shared/reminded inside FPC
  • Survey of technologies in progress
  • Squeezing and filter cavity (E. Capocasa)
  • Facility limitations/subsystem summary (good contribution from Akutsu-san)

• Talk from FPC (by Michimura-san or SH) at KIW5

• Talk from FPC at LVC meeting

  • Positive response from the organizer; possible talk either at Joint Instrument Science session on Tuesday afternoon or the Plenary session on Thursday)