CCATandCCAT-pCerroChajnantorAtacamaTelescope
(prime/pathfinder)
FrankBertoldiBonnUniversity/GermanARCnode
thanksforslidesfromG.Stacey,R.Giovanelli,M.Niemack,M.HaynesandtheCCATcollaboraIon
OrigianalCCATdesign• 25msubmmtelescope
– <17μmsurface– >0.5°fieldofview– StateoftheartinstrumentaIon
• CerroChajnantorSite• “University”styleofoperaIons• ConsorIummembers
– CornellUniversity– Caltech– UniversityofColorado,Boulder– ConsorIumofCanadianUniversiIes– UniversiIesofBonnandCologne– AUI
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CCATScienIficInspiraIon
• MeasureandcharacterizethehistoryofdustystarformaIoningalaxiesthroughcosmicIme– PhotometricsurveystoresolvetheFIRbackground– Spectroscopicsurveyscharacterizingtheenergysources:stellar
populaIons,shocksandAGNacIvity• CharacterizethestarformaIonprocesslocallythrough
submmspectroscopyanddustconInuumemission– Over10’sofdegreescalesandthrough5ordersofmagnitudein
scaleforintheMilkyWay– Completemapsoveravarietyofenvironmentsinnearbygalaxies
• ProbetheastrophysicsofgalaxyclustersthroughtheSunyaev-Zel’dovicheffect(SZ)
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Date4
LocaIon,LocaIon,LocaIon.
WhyistheCCATfacilityidealforpursuingthisscience?
Date
CerroChajnantor(5600m)hasbegerobservingthanSouthPole,Chajnantor(ALMA)plateau,MaunaKea.
-350µm:rouIne-200µm:best10%-longeλ:begersensiIvty&efficiency
Radford&PetersonarXiv:1602.08795
• SimonRadfordhasbeenrunningIppingradiometersatprimarysitesformorethanadecade
• SimultaneousperiodforCCATvs.ALMAsite:medianis0.6vs.1mmH2O:factorof1.7insensi/vity
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• 2012:NSFEDPgrant• Fall2013:externaldesignreview• Fall2013:NSF-MSIPproposaltoNSF,May2014:declined• Fall2014:CaltechleavesCCAT
ProjectHistory
Date
EngineeringDesignPhase2011-2014
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• Detaileddesignsandinterfacesforsub-systemsandsub-assemblies:– primary/secondary/terIaryCFRPsegments,precisionactuators,primarytrusselements
(CFRPstruts,Invarnodes),enclosure,summitfacility,– prototypedandtested,compeIIvebids– readyforconstrucIonphase
• Accessroaddesign• Siteseismicanalysis• SiteconcessionfromChile• CorporaIonstructure
CameraDevelopments:C-Cam,C-MOS,CHAI• 4colorcamera–splitinto7sub-cameras(6.0’FoV)
– 4–350μmsub-cameras;11,900λ/D(=2.9”)pixelseach– 1–450μmsub-cameras;7,200λ/D(=3.7”)pixels– 1–850μmsub-camera;2,000λ/D(=7.0”)pixels– 1-2000μmsub-camera;360λ/D(=16.5”)pixels
• DetectorTechnology:TESorKIDdevices
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57,160pixels
1.4m
6thZermagISMSymposium
Date
2015Descope1. RFPsforconceptualdesigncontractissuedtotwocompanies
fixedpricefordesign&fabricaIonoftelescope2. ReviewsinSep/Dec2015:25m,12mm,20’FoV,5600m~withinlimits.
Noenclosurenecessary.UncertainIesareassemblyathighsite:extracostca.15%.
3. MSIPproposalsubmigedinSep.2015:declinedinDec.2015.
Date
Designcurrentlyunderdiscussion:
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Maximumtelescopesizesetbyroadaccess:noassemblyattopnecessary
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CrossedDragoneDesign
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(J.Stutzki)
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kSZ:kinemaIcSunyaev-Zel’dovichsignatureGEco:“GalacIcecology”studiesofthedynamicISMIM/EOR:Intensitymappingof[CII]atz=6-8
Pluspoten;alfor:CMB:StageIVground-basedCMBobservatory
ScienceCase
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DiscussionswithpotenIalpartnerinsItuIonsareon-going;ourpartnershipissIllopen,butweneedtomovequickly.