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FIRE: Status update and Preliminary Commissioning Plan

FIRE: Status update and Preliminary Commissioning Plan. Rob Simcoe (A. Burgasser, M. Smith, R. Bernstein, B. Bigelow, J. Pipher, C. McMurtry, W. Forrest) May 20, 2007. Best Estimate of delivery: 2009A. Remainder 2007: Detailed design and development 2008: Fab and assembly

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FIRE: Status update and Preliminary Commissioning Plan

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  1. FIRE:Status update and Preliminary Commissioning Plan Rob Simcoe (A. Burgasser, M. Smith, R. Bernstein, B. Bigelow, J. Pipher, C. McMurtry, W. Forrest) May 20, 2007

  2. Best Estimate of delivery: 2009A • Remainder 2007: Detailed design and development • 2008: Fab and assembly • Late 08/Early 09: Aligment / testing • Early 2009: Pre-ship review • 2009: Shipment and commissioning

  3. Capabilities: Echelle • Single object • R=6000 (50 km/s) for 0.6” slit • 0.85-2.5 microns single-shot • Orders 10-30 • Pixel scale (spatial direction) • Reddest order: 0.18” • Bluest order: ~0.10” • 0.18” everywhere in dispersion • Slits down to 0.3” • Slit length 7-8”

  4. Optical Layout

  5. Capabilities: Low-dispersion • Via x-dispersion prisms (ZnSe, Infrasil) • R ~ 1000 • Not constant, not linear • Wavelength coverage same • Slit length ~1’ • High throughput

  6. Capabilities: Slit-viewing • Cold, IR slit viewer • Primary function: acquisition • Secondary function: flexure compensation “slow guiding” • 50” x 50” FOV, 0.1” pixels • Probably fixed-filter (J, H, or K)

  7. Observatory impact • Folded port operation • Cooled with CCR • Hose plumbing early • Less maintenance later • 2 mechanisms (slit, 2-position turret) • Observatory guiders, cable wraps, some TCS interfacing

  8. Spectral Footprint • Orders 11-30 • Matched to H2RG detector • Note sky lines • Only FSR shown

  9. Theoretical throughput • Includes telescope, slit loss • Representative BBAR coatings for materials, AOIs • Detector: • Conservative QE • Realistic dark • RN an issue

  10. Calibration • FIRE-specific unit external to dewar • Produce f/11 beam • Produce pupil for internal alignment • Ancillary calibration (arc, flats) • Primary wv cal from sky • Primary FF cal from observatory screens

  11. 1st design review • Dec 2006 • Verified optical design • Verified plans for detector • Recommended more focus on mechanics • Budget concerns as presented • Response to date • Hired mechanical engineer from MKI • Secured additional internal funding (Primary funding from MRI)

  12. Design Status: Optics • Layout essentially complete • Vetted by reviewers, Epps, (Shec?) • Rebecca now tolerancing design • End of summer • Order long-lead blanks (i.e. ZnSe prisms) • Contract external optics • Slit-viewer in Rev A • All-refracting, basic layout known • Re-tuning for off-the-shelf optics • Coating test bench (Summer 2007)

  13. Design Status: Detectors • All eyes on Teledyne (Rockwell) • Order at lawyer stage • Development at UR • SIDECAR testing (with existing MUX) • Eng grade for slit-viewer • ~ year for SG device • Communicate with FourStar

  14. Approximate instrument envelope • Early rev, will grow slightly larger • Slight modification of standard serpentine cable wrap

  15. Design Status: Mechanics • Building from inside out • IC at optical bench • Prism enclosure • Detector mount • Grating cell • Turret • Contract • Camera • Offner

  16. Design Status: Mechanics • Bench flexure analysis ongoing • Pointing (shear) and focus (axial) displacements near spec • Aiming for <=0.1 pixel deflections per hour

  17. Software products: UI • Modeled on (stolen from) FourStar • Separate controls for spectrograph, slit-viewer • Some user-level TCS control • Quick-look extraction • Minimal control options

  18. Software products: planning and reduction • SNR / Format simulator (exists) • IDL reduction tools provided by team • Kelson-style sky subtraction • Experience, incentive on instrument team (MIKE, GNIRS) • 3-6 months after 1st light

  19. Port preference • Your problem, not mine • Preference • Long run? Probably on telescope without FourStar • Short run? • FourStar? • F5? • Commissioning collisions

  20. Commissioning Needs • Re-assembly in LCO instrument lab (class 10k) • 3-phase power needed • Not much room required • Routing of CCR lines • Computing infrastructure • UPS issues

  21. Commissioning Tasks • Reassemble, tweak alignment • Full lab cooldown • Transport to summit, mount • Calibrate pointing, slit-viewer • Pupil alignment wrt telescope • Computing / TCS

  22. Best Estimate of delivery: 2009A • Remainder 2007: Detailed design and development • 2008: Fab and assembly • Late 08/Early 09: Aligment / testing • Early 2009: Pre-ship review • 2009: Shipment and commissioning

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