1 NGAO Instrumentation Studies Overview By Sean Adkins November 14, 2006

2 Presentation Outline Study Strategy Study Plan Major Objectives Science Instrument Reuse Trade Study

3 Study Strategy The NGAO Instruments Working Group (IWG) is formed –Exists for the duration of the NGAO SD phase –Focused on instrumentation related matters Instrument specialist perspective for NGAO Resource for AO system design team on instrumentation issues –Organization 6 to 8 members 3 to 4 are funded from current NGAO plan –Responsible for most of the technical work related to the NGAO instrumentation WBS 3 to 4 are volunteers from the NGAO science team –Primary contacts with NGAO science team for instrument related science requirements Regular meetings will be held involving the entire group

4 NGAO IWG Membership Funded positions Sean Adkins – chair of IWG, overall systems, detectors, electronics and interfaces Anna Moore – instrument generalist, optical and mechanical TBD – instrument generalist, optical and mechanical, experience with cryogenics TBD – software engineer NGAO Science Team TBD Additional assistance and advice will be sought from the diverse base of the collective instrumentation and technical resources at UC and CIT

5 Study Plan IWG direct WBS element responsibilities from SEMP – Instrument Balance – Instrument Reuse – Notional Allocation of Function to Science Instruments Version 1 – Notional Allocation of Function to Science Instruments Version 2 –3.5 Science Instruments Reuse and Compatibility New Instruments Other areas where IWG should be involved or consulted –Instrument requirements in element 2.1 –2.2.2 Observatory Interface Requirements –2.2.3 Science Operations Requirements –Various items in elements 3.1, 3.2, 3.3, 3.4 – Science Instruments Test Plan –4.4.2 System Integration & Test Plans

6 Study Plan, cont’d. Priorities 1.Science instruments re-use 2.Instrument balance 3.Near-IR deployable IFU 4.Imagers 5.Visible IFU 6.Preferred solution to near-IR IFU & thermal near-IR imager

7 Study Timeline

8 Major Objectives “…take the science instruments to a proposal level…” –What constitutes an instrument proposal? This is addressed by the WMKO instrumentation development process –Science requirements analysis and flow down –Derived technical requirements –Use case definition and analysis –Technical analysis –Interface requirements –Management »Risk analysis and mitigation plan »WBS »Schedule and budget »Project plan –What is the best way to accomplish the objective? IWG workups? Solicitation of proposals from prospective builders?

9 Scope Focus on science requirements –Wavelength Coverage Range and bands –FOV –Plate Scales IFU Imaging –Spectral Resolution –Sensitivity & background –Residual wavefront error –Auxiliary functions Coronagraphs, polarimeters, etc. –Calibration –Data reduction –Packaging Orientation of input optical axis Field derotation Overall size, weight, power, cooling requirements, etc.

10 Current NGAO Instrument List

11 Science Instruments Reuse Trade Study Objective –evaluate the potential for reuse of OSIRIS and NIRC-2 with NGAO Estimate the performance of OSIRIS with NGAO in the role of the near-IR IFU Determine the nature, feasibility and ROM cost of possible improvements to OSIRIS to take advantage of NGAO such as an increased FOV Review and summarize the constraints on NGAO design that are imposed by the current OSIRIS ICD –Ditto NIRC-2 as the thermal near-IR imager Main parameters to be considered –Wavelength coverage –FOV –Plate scales (IFU and imaging) –Slit size(s) - real and virtual –Spectral resolution(s) –Sensitivity and instrument background –Residual wavefront error –Constraints on NGAO design imposed by instrument ICD Packaging - orientation of optical axis, field derotation Interfaces - input focal ratio, software, etc. –NGAO vs. other telescope AO instrumentation and overall instrument balance –Feasibility and cost/benefit of upgrades for NGAO