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Impact of Cost Savings Ideas on NGAO Instrumentation

Impact of Cost Savings Ideas on NGAO Instrumentation. December 19, 2008 Sean Adkins. NGAO Instrumentation. Instrumentation plans and requirements based on the current version of the NGAO SCRD Single Object near-IR IFS Larger FOV, improved sensitivity, diffraction limited spatial sampling

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Impact of Cost Savings Ideas on NGAO Instrumentation

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  1. Impact of Cost Savings Ideas on NGAO Instrumentation December 19, 2008 Sean Adkins

  2. NGAO Instrumentation • Instrumentation plans and requirements based on the current version of the NGAO SCRD • Single Object near-IR IFS • Larger FOV, improved sensitivity, diffraction limited spatial sampling • Near-IR imager, simple occulting spot coronagraph • Nominal 30” FOV, pixel scale 3 times diffraction limit at Y band cut-on wavelength • Visible imager, no coronagraph • 30” FOV?, pixel scale 2 or 3 times diffraction limit at 850 nm

  3. Single Object Near-IR IFS • Issues for improving near-IR IFS performance have been identified and placed in the context of the NGAO science requirements • NSF-ATI supported work will deliver trade studies of key performance and function trades followed by a preliminary design

  4. Activities • Work is in progress to establish an initial understanding of the impact of extending the spectral coverage of the near-IR IFU to below 850 nm • Work is also in progress on the optical design and specifications for the near-IR imager • Need final NGAO relay interface (optical and mechanical)

  5. Issues • Instrumentation plans and requirements based on the current version of the NGAO SCRD • NGAO SCRD is likely to have a revision based on impact of cost savings on science capability and to fold in connections to/impacts of the WMKO Strategic Plan, currently being drafted

  6. Instrumentation Impacts • Cost savings estimates imply only ~$8M for instrumentation • Essentially no funds for visible imager • Revisions to SCRD, and general state of flux in the discussion imply a need to revisit instrumentation plans early in the New Year • Straw proposal if instrumentation must be delivered for less than $8M • Combined near-IR imager and IFU, on axis, at the narrow field relay • Simple, but not totally free, visible imager • Future upgrade to visible imager to incorporate IFU mode, post NGAO funding

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