KAGRA Auxiliary Optics System (AOS)

Objectives

• The objectives of the subgroup "Auxiliary Optics System" (AOS) is to design and complete the auxiliary optics that physically, logically and consistently glue the main parts of the KAGRA interferometer together.

General Description

• Most of the AOS shall be fit to the vacuum chambers that had been already determined when the AOS group was established.
• Even if the vacuum chamber was not designed considering the space allocated for AOS, AOS are required for fully operating KAGRA, so we shall, by any means, pack them into the vacuum chambers if required.

References

Subsystems

Major subsystems

• Subsystems	Related subgroups	Notes
  Stray Light Control	IOO, MIF, VAC, CRY, VIS
  Beam Reducing Telescopes	IOO, MIF, VAC, CRY, VIS
  Optical Lever	IOO, MIF, VAC, CRY, VIS
  Imagers and Light Sources	ISC, IOO	including CCD Monitors or equivalent
  Viewports	IOO, MIF, VAC, CRY, VIS, MIR	at room temperature
  Automatic Target System	MIF, VAC, DGS
  Beam Profilers for large beams	IOO, MIF, VAC

Other subsystems

• Any other optics, outside breadboard,...
  • Squeezing system??
• Highly Related Subsystems (not included in AOS)

  • Beam Shutters(IOO, MIF)

  • Initial Alignment(MIF)

  • Local Sensors and Actuators (LIGO's OSEM-like things utilized in vibration isolation system)(VIS)

  • Violine mode sensors or Wire position sensors (utilized in vibration isolation system or in noise-hunting phase)(VIS?)

Meetings

• LCGT-AOS Meetings

• Meeting Archive

Useful Links

• Descriptions	Links
  LIGO Document Control Center	https://dcc.ligo.org/
  aLIGO Auxiliary Optics	https://www.advancedligo.mit.edu/aos.html
  How to join Mailing Lists for LCGT project	http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/LCGT/subgroup/howtojoin
  KAGRA AOS blog	http://gwclio.icrr.u-tokyo.ac.jp/lcgtsubgroup/auxiliary/