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NGAO Instrumentation Overview September 2008 Updated

Explore the design, cost estimates, and progress of the NGAO Instrumentation activities, including Near-IR and Visible Imagers and integral field spectrograph. Get insights into the major subsystems and cost projections for construction.

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NGAO Instrumentation Overview September 2008 Updated

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  1. NGAO InstrumentationOverviewSeptember 2008Updated Sean Adkins

  2. Introduction • NGAO Instrumentation Activities • Support PDR success • Design and build to cost objectives • Requirements changes • Scope changes • Cost estimates • Systems engineering goals • Interface definitions • Address SDR report comments related to instrumentation • Move instrument designs forward • Address most challenging design aspects • Develop firm interface definitions with AO system • Support other design activities • AO enclosure and structure design • AO optical design, particularly dichroic system, wavefront error allocations • Overall OOCD • Master command sequencer • Develop full plans for design and fabrication

  3. Overview of Instrumentation • Introduction • Review of existing instrument requirements and concepts • Near-IR Imager • Visible Imager • d-IFS • Initial Plan

  4. Requirements Review • Overall Instrumentation Plan at SDR: • Multi-object deployable integral field spectrograph (d-IFS) • Near-IR Imager • Visible Imager • OSIRIS

  5. d-IFS • OSM design shared/common with near-IR TT probes • Spectrograph is heritage design except for mirror slicer • Easily built in modules

  6. d-IFS • Major optical path subsystems • OSM • MOAO Relay • Dewar • Filter Wheel • K-mirror • Re-imager • Image Sampler • Spectrograph

  7. d-IFS Design Preparation • Pre-requisites • AO system wide field optical characteristics • OSM configuration concept • Confirmation of available envelope and mounting configuration for instrument • Initial AO System to Instrument interface definitions • Optical • Mechanical • Electronic/Electrical • Software • Alignment and Calibration Concept for Instrument on AO System • Trade Studies • AO and Instrumental Wavefront Error • Spatial Scales • Close Packing • Spectral Resolutions • Imaging Mode

  8. d-IFS

  9. Near-IR Imager • Simple, high performance imager • Design based on heritage where possible

  10. Near-IR Imager • Major optical path subsystems: • Input Baffle • APLC • Pupil Imager • Focal Plane Mask • Adjustable Lyot Stop • Filter Wheels • Camera • Detector Head

  11. Near-IR Imager Design Preparation • Pre-requisites • AO system narrow field optical characteristics • Confirmation of available envelope and mounting configuration for instrument • Initial AO System to Instrument interface definitions • Optical • Mechanical • Electronic/Electrical • Software • Alignment and Calibration Concept for Instrument on AO System • Trade Studies • AO and Instrumental Wavefront Error • Pixel Scale • Short Wavelength Cut-off

  12. Near-IR Imager

  13. Visible Imager • Simple, high performance imager • Design based on heritage where possible

  14. Visible Imager • Major optical path subsystems • Input Baffle • Filter Wheels • Camera • Full Field Camera • Integral Field Camera • Camera Exchange Mechanism • Detector • Cryostat • Focal Plane Assembly • Cooling System • Window • Focus Mechanism No Coronagraph

  15. Visible Imager Design Preparation • Pre-requisites • AO system narrow field optical characteristics • Confirmation of available envelope and mounting configuration for instrument • Initial AO System to Instrument interface definitions • Optical • Mechanical • Electronic/Electrical • Software • Alignment and Calibration Concept for Instrument on AO System • Trade Studies • AO and Instrumental Wavefront Error • Pixel Scale • IFU Capability

  16. Visible Imager

  17. Costs in “Then Year” Dollars • d-IFS $12.8M plus $1.2M contingency • Near-IR Imager $3.7M plus $550K contingency • Visible Imager $3.4M plus $510K contingency • Total $22.16M with contingency and 4% cost inflation

  18. d-IFS

  19. Construction Cost

  20. Near-IR Imager

  21. Visible Imager

  22. Imager Construction Cost Estimates Near-IR Imager Visible Imager (No coronagraph)

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