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NGAO Instrumentation Overview September 2008 Updated

NGAO Instrumentation Overview September 2008 Updated. Sean Adkins. Introduction. NGAO Instrumentation Activities Support PDR success Design and build to cost objectives Requirements changes Scope changes Cost estimates Systems engineering goals Interface definitions

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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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