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| * Fixed mirrors for AS port (including SR2) * IR/green steering mirrors [Michimura] * proposed specs * HR reflectivity: more than 99% for both 1064nm and 532nm * AR refectivity: less than 0.3 % for 1064nm, similar for 532nm * incient angle: 20-45 deg, s-polarization * radius of curvature: flat * size: 2-inch * wedge: 1 deg * substrate: Fused Silica * surface quality: λ/20, 0.1 nm rms roughness |
ISC Meeting on 2017/6/19 14:00 - 15:00
Participants: (eZuce meeting)
Next meeting
2017/7/3 14:00 - 15:00
Agenda
PSL EOM Layout re-consideration [Enomoto] (JGW-T1706748)
- Delay-line length decided to be 2.66 m (instead of 8.88 m)
- Modulation phase between f1 AM and PM is always aligned (we need this to be aligned)
Modulation index needed at each EOM is less than measured maximum index by Uehera (JGW-T1605611)
- Optickle simulation by Kohei Yamamoto
- simulation on imperfections (MZ arm asymmetry, MZ lock, EOM phase difference control etc.)
- start with hand calculation, simple setups, and then to full IFO simulation
- meeting with him on June 6.
- Requirement on carrier power loss?
- OFI and OMC status? [Somiya]
- look for OFI with larger aperture [Somiya]
- output optics task sharing status?
- OMC baseplate issue?
- design review on June 26
Actuator noise modeling [Michimura,Miyamoto] (JGW-T1503453)
Updated magnet size for cryopayload marionette (ActuatorDesign wiki)
- Needs to implement frequency noise, but FSS modeling with ALS is complicated [student!]
Needs to update lock acquisition section (see ISC Meeting minutes 20170410) [Michimura]
bKAGRA Phase 1 initial alignment / commissioning plan [Michimura]: JGW-T1605692
- updated based on current schedule
- ETMX and ETMY cryopayload installation almost at the same time
- MICH lock at room temperature before cooling down (instead of cooling down ETMY first)
- AS cannot be used for room temperature MICH lock (SR3 not ready)
- SR2 won't be ready by the end of March 2018
- Fixed mirrors for AS port (including SR2)
- updated based on current schedule
- IR/green steering mirrors [Michimura]
- proposed specs
- HR reflectivity: more than 99% for both 1064nm and 532nm
- AR refectivity: less than 0.3 % for 1064nm, similar for 532nm
- incient angle: 20-45 deg, s-polarization
- radius of curvature: flat
- size: 2-inch
- wedge: 1 deg
- substrate: Fused Silica
- surface quality: λ/20, 0.1 nm rms roughness
- proposed specs
See this page for other agendas.