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| * Introduction (Aso) [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=12478|Slides]] * Technical overview (Matteo) |
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.
Minutes
Introduction (Aso) Slides
- Technical overview (Matteo)
- Identification of Tasks
- Clarify the constraints
- Check available space, location
- Tomaru-san started investigation with Araki-san
- Near IYA, air ducts may interfere
- Using X-arm is also an option to consider
- Beam height choice (same as the main beam or lower)
- Tomaru-san started investigation with Araki-san
- Vacuum interface
- Check available flanges on OMC or OMMT chambers
- Can we penetrate the X-arm duct ?
- Cryostat door interference if we use the same beam height as the main beam
- Put GVs to make a removable section next to cryostats ? : risk of vacuum leak.
- Vacuum modifications in conjunction with overall KAGRA vacuum upgrade ?
- Check available space, location
- Conceptual 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
- Baffles in the beam duct ?
- Movable targets ?
- Clean room design
- Control system
- FC LSC
- FC ASC
ASC for FC->MIF coupling
- Control system hardware
- Analog electronics
- DGS
- Milestones for the conceptual design
- Intermediate status review in April
- Conceptual design review in July
- Mutual review of the working group
- Internal review by KAGRA members not involved in the working group
- External review by LIGO/Virgo experts
- Make a realistic budget
- Make a project schedule
- Clarify the constraints
- Confirm available members
- We heard from participants about their interested area of contribution
- Matteo and Aso will contact people individually for further discussion on the task assignment
- Schedule regular meetings
- We will hold biweekly meetings
- Schedule of the meeting will be decided by Doodle poll.
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
- Clarify the constraints
- Confirm available members
- Schedule regular meetings
- Biweekly ?