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LGS Project Meeting

LGS Project Meeting. Agenda SWIFT update - A. Bouchez Laser facility status - A. Bouchez AO bench plans - J. Roberts LGS user interface - J. Roberts FlexCam: A method for sensing non-common path pointing errors on PalAO - K. Wallace. December 21, 2006. SWIFT Optical Design.

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LGS Project Meeting

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  1. LGS Project Meeting • Agenda • SWIFT update - A. Bouchez • Laser facility status - A. Bouchez • AO bench plans - J. Roberts • LGS user interface - J. Roberts • FlexCam: A method for sensing non-common path pointing errors on PalAO - K. Wallace December 21, 2006

  2. SWIFT Optical Design http://www.astro.caltech.edu/oir/swift/

  3. SWIFT Mechanical Design

  4. SWIFT mounting to AO bench • SWIFT optical bench mounts ot AO bench using 3 permanently located conical mounting points. Clamp mechanism is captive to SWIFT bench. • Mounting scheme for PHARO FM3 still unresolved.

  5. SWIFT handling cart • Allows work on instrument with optics up and mounting to AO bench on AO spit and at on telescope (Cass ring at 155º). • Now provides 1 cm fine position and tilt adjustment using mechanism below.

  6. Review panel recommendations • Arrival at Palomar should be delayed 2-3 months (to May-June 2008) to allow more thorough integration and testing. • I & T schedule needs to be more clearly defined. • More resources should be devoted to software development. • Operational modes and calibrations need to be defined.

  7. SWIFT tasks for Palomar and AO group • Clarify mass limit. SWIFT currently estimated to be 220 kg + cables. Determine if AO bench can support weight. • Provide non-common path flexure data to SWIFT team. Determine if we can mitigate before SWIFT arrival. • Plan mounting scheme and purchase of new science dichroic. • Determine strategy regarding SWIFT shutter. • Layout AO relay (& PHARO) to provide focus at new location. • Recoat relay optics (OAPs and flats). • Design new mounting scheme for PHARO FM3. • Implement required changes to AO stimulus. • Build new enclosure. • Consider implications of SWIFT on NGS/LGS acquisition software and procedures.

  8. AO 5-year plan

  9. Laser facility status • Laser is in good shape for January observing run. • Power and wavefront quality • Replace both laser heads with Mach-3 design (Jan. 10-17) • Replace sum-frequency and intra-cavity crystals. • Document laser optical design. • Characterize delivered wavefront quality. • Characterize bandwidth and pulse shape. • Reliability and automation • Improved cleanliness (clean-room enclosure, clean optics). • Improved temperature control of bench (insulation, etalon control). • Phased implementation of LGS computer: • Temperature display and control. • Frequency dither loop control. • Power display and logging. • Image display and logging. • Program delay generator. Operations • Document operations procedures

  10. AO Bench Opto-mechanics • Current plans for January/February • Dichroic • Separate reflecting spot and dichroic capabilities into 2 optics • Use a motorized stage to switch between the two optics • LOWFS • Testing to determine the cause of the observed loss of light in the LOWFS path • Future Plans • Re-layout LOWFS and acqusition camera in order to put the LOWFS directly in the beam path and remove the pick off requirement

  11. New Dichroic Layout • Dichroic • Separate reflecting spot and dichroic capabilities into 2 optics • Use a motorized stage to switch between the two optics • LOWFS • Testing to determine the cause of the observed loss of light in the LOWFS path

  12. AO Software • Build for January includes bug fixes and previously tested code only • aodr bug fix for recording BTO data • Ability to turn off late message warnings in aodr (now the default) • Remove debug print in aocp when doing a restore • AO software version switching • New user interface to be implemented for February run • Includes NGS improvements and new mode structure for LGS

  13. New LGS User Interface GUI Functionality Full document located at http://www.oir.caltech.edu/twiki_oir/bin/view.cgi/Palomar/PalmLGS/WebHome under Technical Reference (until there’s an AO software page)

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