April 9, 2008 NGS Engineering


The Palomar AO system has recently undergone a significant refurbishment. In the 4 months since November 29, 2007, we have:
  • Recoated the AO relay flats and OAPs, and repolished and recoated the DM.
  • Realigned the AO relay to provide a focus suitable for P1640 and SWIFT.
  • Mounted FM3 on a removable kinematic base.
  • Modified the PHARO mounting cradle to move PHARO forward 4.5".
  • Modified the AO enclosure and added a PHARO FM3 enclosure.
  • Installed a new AO stimulus, with 594nm laser source.
  • Installed a new motor controller for Aerotech stages.
The purpose of this engineering night is to demonstrate the readiness of the refurbished system for NGS-AO science, and to characterize its performance.

Personnel and engineering schedules

Planning to be present: Angione, Baranec, Bouchez, Burruss, Roberts, Troy.
Engineering schedules:

Procedures and test plans

Please post your test plans on the Test Plan Library page, and add a link below.
  • Daytime tests
    • AO bench setup and checkout (2 hrs) - J. Roberts
      • Tune image on PHARO
      • Check centration of field stop.
      • Check AO to telescope pupil alignment.
    • PHARO pupil motion (1 hr, telescope operator required) - A. Bouchez
    • Stimulus/AO system flexure (1 hr, telescope operator required) - R. Burruss
      • Demonstrate WL acquisition at all zenith angles.
      • Test Plan
  • Nighttime tests
    • SSM motion and pupil registration (1 hr) - J. Roberts.
      • SSM range, pupil/image motion control, centroid to pupil motion gain)
    • Demonstrate new registration & flatmap routines (30 min) - J. Angione
    • Closed-loop performance (3 hr?) - A. Bouchez / J. Angione
      • Good seeing/Stable transmission.
      • V=6?, 8, 10, 12, 14
      • Test reconstructors?
    • Predictive AO data (10-15 min per data collection, multiple times per night (3-4) if possible) - M. Troy.
    • Throughput (1 hr; clear) - R. Burruss.
    • Platescale (PHARO, ACAM, LOWFS) (1 hr) - A. Bouchez
    • Field distortion (30 min?) - B. Cameron / R. Dekany
    • Flexure (1 hr).
      • If daytime test shows significant flexure.
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Topic revision: r6 - 2008-04-09 - AntoninBouchez
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