FIRE:FIRE:Status update and Preliminary Status update and Preliminary Commissioning PlanCommissioning Plan

Rob Simcoe (A. Burgasser, M. Smith, R. Rob Simcoe (A. Burgasser, M. Smith, R. Bernstein, B. Bigelow, J. Pipher, C. McMurtry, W. Bernstein, B. Bigelow, J. Pipher, C. McMurtry, W. Forrest)Forrest)

May 20, 2007May 20, 2007

Best Estimate of Best Estimate of delivery: 2009Adelivery: 2009A Remainder 2007: Detailed design Remainder 2007: Detailed design

and developmentand development 2008: Fab and assembly2008: Fab and assembly Late 08/Early 09: Aligment / testingLate 08/Early 09: Aligment / testing Early 2009: Pre-ship review Early 2009: Pre-ship review 2009: Shipment and 2009: Shipment and

commissioningcommissioning

Capabilities: Echelle Capabilities: Echelle

Single objectSingle object R=6000 (50 km/s) for 0.6” slitR=6000 (50 km/s) for 0.6” slit 0.85-2.5 microns single-shot0.85-2.5 microns single-shot

– Orders 10-30Orders 10-30 Pixel scale (spatial direction)Pixel scale (spatial direction)

– Reddest order: 0.18”Reddest order: 0.18”– Bluest order: ~0.10”Bluest order: ~0.10”– 0.18” everywhere in dispersion0.18” everywhere in dispersion

Slits down to 0.3”Slits down to 0.3” Slit length 7-8”Slit length 7-8”

Optical LayoutOptical Layout

Capabilities: Low-Capabilities: Low-dispersiondispersion Via x-dispersion prisms (ZnSe, Via x-dispersion prisms (ZnSe,

Infrasil)Infrasil) R ~ 1000R ~ 1000

– Not constant, not linearNot constant, not linear Wavelength coverage sameWavelength coverage same Slit length ~1’Slit length ~1’ High throughputHigh throughput

Capabilities: Slit-Capabilities: Slit-viewingviewing Cold, IR slit viewerCold, IR slit viewer

– Primary function: acquisitionPrimary function: acquisition– Secondary function: flexure Secondary function: flexure

compensation “slow guiding”compensation “slow guiding” 50” x 50” FOV, 0.1” pixels50” x 50” FOV, 0.1” pixels Probably fixed-filter (J, H, or K)Probably fixed-filter (J, H, or K)

Observatory impactObservatory impact

Folded port operationFolded port operation Cooled with CCRCooled with CCR

– Hose plumbing earlyHose plumbing early– Less maintenance laterLess maintenance later

2 mechanisms (slit, 2-position 2 mechanisms (slit, 2-position turret)turret)

Observatory guiders, cable wraps, Observatory guiders, cable wraps, some TCS interfacingsome TCS interfacing

Spectral FootprintSpectral Footprint

Orders 11-30Orders 11-30 Matched to H2RG Matched to H2RG

detectordetector Note sky linesNote sky lines Only FSR shownOnly FSR shown

Theoretical throughputTheoretical throughput

Includes Includes telescope, slit losstelescope, slit loss

Representative Representative BBAR coatings for BBAR coatings for materials, AOIsmaterials, AOIs

Detector:Detector:– Conservative QEConservative QE– Realistic darkRealistic dark– RN an issueRN an issue

CalibrationCalibration

FIRE-specific unit external to FIRE-specific unit external to dewardewar– Produce f/11 beamProduce f/11 beam– Produce pupil for internal alignmentProduce pupil for internal alignment– Ancillary calibration (arc, flats)Ancillary calibration (arc, flats)

Primary wv cal from skyPrimary wv cal from sky Primary FF cal from observatory Primary FF cal from observatory

screensscreens

11stst design review design review

Dec 2006Dec 2006– Verified optical designVerified optical design– Verified plans for detectorVerified plans for detector– Recommended more focus on mechanicsRecommended more focus on mechanics– Budget concerns as presentedBudget concerns as presented

Response to dateResponse to date– Hired mechanical engineer from MKIHired mechanical engineer from MKI– Secured additional internal funding Secured additional internal funding

(Primary funding from MRI)(Primary funding from MRI)

Design Status: OpticsDesign Status: Optics

Layout essentially completeLayout essentially complete– Vetted by reviewers, Epps, (Shec?)Vetted by reviewers, Epps, (Shec?)

Rebecca now tolerancing designRebecca now tolerancing design End of summer End of summer

– Order long-lead blanks (i.e. ZnSe prisms)Order long-lead blanks (i.e. ZnSe prisms)– Contract external opticsContract external optics

Slit-viewer in Rev ASlit-viewer in Rev A– All-refracting, basic layout knownAll-refracting, basic layout known– Re-tuning for off-the-shelf opticsRe-tuning for off-the-shelf optics

Coating test bench (Summer 2007)Coating test bench (Summer 2007)

Design Status: Design Status: DetectorsDetectors All eyes on Teledyne (Rockwell)All eyes on Teledyne (Rockwell) Order at lawyer stageOrder at lawyer stage Development at URDevelopment at UR

– SIDECAR testing (with existing MUX)SIDECAR testing (with existing MUX)– Eng grade for slit-viewerEng grade for slit-viewer– ~ year for SG device ~ year for SG device

Communicate with FourStarCommunicate with FourStar

Approximate Approximate instrument envelopeinstrument envelope Early rev, will Early rev, will

grow slightly grow slightly largerlarger

Slight Slight modification of modification of standard standard serpentine cable serpentine cable wrapwrap

Design Status: Design Status: MechanicsMechanics Building from inside Building from inside

outout IC at optical benchIC at optical bench

– Prism enclosurePrism enclosure– Detector mountDetector mount– Grating cellGrating cell– TurretTurret

Contract Contract – CameraCamera– OffnerOffner

Design Status: Design Status: MechanicsMechanics Bench flexure Bench flexure

analysis ongoinganalysis ongoing Pointing (shear) Pointing (shear)

and focus (axial) and focus (axial) displacements displacements near specnear spec

Aiming for <=0.1 Aiming for <=0.1 pixel deflections pixel deflections per hourper hour

Software products: UISoftware products: UI

Modeled on (stolen Modeled on (stolen from) FourStarfrom) FourStar

Separate controls Separate controls for spectrograph, for spectrograph, slit-viewerslit-viewer

Some user-level Some user-level TCS controlTCS control

Quick-look Quick-look extractionextraction

Minimal control Minimal control optionsoptions

Software products: Software products: planning and reductionplanning and reduction SNR / Format simulator (exists)SNR / Format simulator (exists) IDL reduction tools provided by IDL reduction tools provided by

teamteam– Kelson-style sky subtractionKelson-style sky subtraction– Experience, incentive on instrument Experience, incentive on instrument

team (MIKE, GNIRS)team (MIKE, GNIRS)– 3-6 months after 13-6 months after 1stst light light

Port preferencePort preference

Your problem, not mineYour problem, not mine Preference Preference

– Long run? Probably on telescope Long run? Probably on telescope without FourStarwithout FourStar

– Short run?Short run? FourStar?FourStar? F5?F5? Commissioning collisionsCommissioning collisions

Commissioning NeedsCommissioning Needs

Re-assembly in LCO instrument lab Re-assembly in LCO instrument lab (class 10k)(class 10k)– 3-phase power needed3-phase power needed– Not much room requiredNot much room required

Routing of CCR linesRouting of CCR lines Computing infrastructureComputing infrastructure UPS issuesUPS issues

Commissioning TasksCommissioning Tasks

Reassemble, tweak alignmentReassemble, tweak alignment Full lab cooldownFull lab cooldown Transport to summit, mountTransport to summit, mount Calibrate pointing, slit-viewerCalibrate pointing, slit-viewer Pupil alignment wrt telescopePupil alignment wrt telescope Computing / TCSComputing / TCS

Best Estimate of Best Estimate of delivery: 2009Adelivery: 2009A Remainder 2007: Detailed design Remainder 2007: Detailed design

and developmentand development 2008: Fab and assembly2008: Fab and assembly Late 08/Early 09: Aligment / testingLate 08/Early 09: Aligment / testing Early 2009: Pre-ship review Early 2009: Pre-ship review 2009: Shipment and 2009: Shipment and

commissioningcommissioning