• In-vacuum_tasks

This page describes the in-vacuum comissioning tasks during the OMC installation.

1. Install the OMC, OMMT, DCPD, an TTPZT in OOC, and TTPZT in BS chamber.
   • Run cables, set up control electronics outside of vacuum.
2. Alignment
   • Mount pre-aligned breadboards with OMC and OMMT in predefined
     • position with backwards propogating fiber pre-aligned.
   • Lock OMC using light leaking from HR end mirror on OMC.
   • Use backwards propogating beam to align OMMT and input PZT tip/tilt mirrors
     • to cast a spot to the SRM. If possible, confirm propogation to BS, ITM and PRM. **** Alignment must be done with quiescent voltages and strain gauge readings on tip/tilt piezos ****
   • Use retro-reflection from SRM to align OMC input beam pick off
     • and beam steering optics to extract beam from vacuum.
   • Possibly use second fiber launched beam to back propogate beam
     • from in-air output table, through the pick-offs to the SRM.
   • Set OMC REFL optics using back reflected beam.
   • Replace fiber launch with DC readout diode and mount amplifier block
3. Install the squeezing optics in OOC:
   • Mirror on translation stage, and fixed mount mirror
4. Adjust OSEMs on large optic suspensions for proper orientation.
   • See link below for likely suspects
   • See iLog link below for method
5. Optical lever beam extraction??