Vent checklists

• Turn OFF PZT high voltage

Alignment precedure

• Put input PZTs in center of range.
• Place cage-mount aperture targets on BS and PRM cages
• Using PZT mirrors ONLY, center beam in PRM aperture, and on PR2 folding mirror, and center PRM retro-reflection in YAW at PZT1/Faraday.
• Adjust PRM pitch biases to center retro-reflection in pitch.
• Add brass-mount apertures to ITMY and ETMY.
• Unclamping and adjusting in yaw, adjust PR2 and PR3 folding mirrors such that beam is through BS, ITMY, and ETMY apertures.
• Using PR2/3 pitch hysteresis, adjust pitch to center beam through BS/ITMY/ETMY apertures.
• Align Y arm PLUS PR2/3:
  • put alignment targets on ITMY/ETMY cages
  • use alignment ruler for PR2/3
  • using PZT1/2, iteratively:
    • center beam on ITMY
    • center beam on ETMY
    • center beam on PR2/3
      • use PR2/3 hysteresis to adjust pitch of PR2/3
  • flashes in Y trans
• Center beam on PRM:
  • height should be constrained at this point based on PR2/3 centering and Y arm alignment
  • move PRM cage if misaligned in yaw
  • PRM retro-reflection should come out REFL cleanly
• Center beam on BS (should not need adjusting):
  • put alignment target on BS
• Align X arm:
  • put alignment targets on ITMX/ETMX cages
  • use BS to center beam on ETMX
  • ITMX height should be constrained by BS/ETMX
  • adjust ITMX cage if misaligned in YAW
  • flashes in X trans
• Align SRC
  • check beam centering on SR3/2/M
  • adjust SRM retro-reflection for centered return beam on BS

Closeup checklist

• Center beam on all AS optics
• Make sure REFL is clear
  • dither PRM, see motion on AP tables
• Make sure AS is clear
  • dither BS/ITM, see motion on AP tables
• Using IPANG/POS pick-off mirrors, center beams on:
  • IPPOS
  • IPANG

• Check all OpLevs centered, in and out of vacuum

• Turn PZT high voltage OFF