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.