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 Remainder 2007: Detailed design and development 2008: Fab and assembly 2008: Fab and assembly Late 08/Early 09: Aligment / testing Late 08/Early 09: Aligment / testing Early 2009: Pre-ship review Early 2009: Pre-ship review 2009: Shipment and commissioning 2009: Shipment and commissioning

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

Optical Layout

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

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

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

Spectral Footprint Orders Orders Matched to H2RG detector Matched to H2RG detector Note sky lines Note sky lines Only FSR shown Only FSR shown

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

Calibration FIRE-specific unit external to dewar 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 wv cal from sky Primary FF cal from observatory screens Primary FF cal from observatory screens

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

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

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

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

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

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

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

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

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

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

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

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