KAGRA Filter Cavity Kick-off meeting

Date/Time/Location

2021 Jan. 20th from 10AM

Connection: KAGRA Zoom2

Abstract

This is a project to install a filter cavity into KAGRA. It is not funded yet, but we should start preliminary design studies to prepare for the time when a fund is available. This meeting's purpose is to gather interested people and identify potential tasks to start this project.

Agenda

• Introduction (Aso)
• Technical overview (Matteo)
• Identification of Tasks
  • Clarify the constraints
    • Available space, location
    • Vacuum interface
      • Available flanges on OMC or OMMT chambers
      • Can we penetrate the X-arm duct ?
      • Cryostat door interference ?
        • - Put GVs to make a removable section next to IYC
      • Vacuum modifications in conjunction with overall KAGRA vacuum upgrade ?
  • Preliminary design
    • Filter Cavity Optical Design
    • Squeezer design
      • Doubly resonant OPO
      • In-vac OPO ?
    • Interface optics design

      • Squeezer -> FC

      • FC -> MIF

    • Back scattering mitigation
      • Theoretical study on requirements
      • New IFI ?
    • Suspension design
    • Vacuum design
    • Control system
      • FC LSC
      • FC ASC

      • ASC for FC->MIF coupling

    • Control system hardware
      • Analog electronics
      • DGS
  • Milestones for the preliminary design
    • Intermediate check in March or April ?
    • Preliminary design review in July ?
  • Make a realistic budget
  • Make a project schedule
• Confirm available members
• Schedule regular meetings
  • Biweekly ?