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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”
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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 commissioning2009: Shipment and commissioning
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 dewarFIRE-specific unit external to dewar
– 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 for Separate controls for
spectrograph, slit-spectrograph, slit-viewerviewer
Some user-level TCS Some user-level TCS controlcontrol
Quick-look extractionQuick-look extraction 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 commissioning2009: Shipment and commissioning