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CCAT-prime
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FrankBertoldiBonnUniversity
CMBinGermany-Garching31Januray2018
CerroChajnantorAtacamaTelescope
v.31.1.
An Extreme Field-of-View Submillimeter Telescope
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CCAT-Prime 2
Ahighsurfaceaccuracy,highthroughput6maperture,submm(0.2-3mm)telescope
fordedicatedsurveys
WhatisCCAT-prime?
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2003 PartnershipworkshopPasadena2004 MoUCaltech,JPL,Cornell2005 projectoffice2006 feasibilitystudyreview2007-9siteselecTon,joiningColorado,Cologne/Bonn,AUI,Canada2010 astro2010recommendaTon2011 -14EngineeringDesignPhase(NSF-supported):referencedesign2013EDPexternalreview2013-15NSFMSIPproposalsfail;Caltech,Coloradoleave2015 MTM,Vertexprovidedturn-keydesignstudies&pricing2016 CCATterminated,CCAT-primeborn
CerroChajnantorAtacamaTelescope
Manydocuments:sciencecase&requirements,instrumentrequirements,designstudiesforsub-systems…
25mFoV30‘<15µmsurface
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CCAT-Prime 4
WhoisCCAT-prime?
• CornellUniversity,Director:TerryHerter• Germanconsor=umUniv.Cologne&Univ.Bonn
– joining:LMU(Mohr),MPA(Komatsu)
• CanadianUniversityconsor=um– Waterloo,Toronto/CITA,BriTshColumbia,Calgary,
Dalhousie,McGill,McMaster,WesternOntario• ChileanUniversitycollaborators
– U.Chile,PUC,UCSC,UDP,andothers• Prime-Camcollaborators
– U.Michigan,NIST,Stanford/SLAC,CardiffU.,andothers
UniversityconsorTumwithstrongemphasisontraining&development
Fundedby:privatedonorandCornelluniversityDFGGroßgeräte,Univ.Köln&Bonn,SFB956(CHAI)
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CerroChajnantor
CerroToco
ALMAOSF
NANTEN2ASTE
APEX
Licancabur
CerroElChascón
Licancabur5920mToco5604mChajnantor5639mElChascon5703m
ACTPasoJama
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CerroChajnantor
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IMWorkshopII,JohnsHopkins 912June2017
CerroChajnantorpeakat5640m
TAO CCAT-p
TAO will be a 6.5m infrared-optimized telescope on the summit of Cerro Chajnantor, promoted by the Institute of Astronomy (IoA), the University of Tokyo & other Japanese facilities incl. the National Astronomical Observatory, ISAS/JAXA, and the University of Chile.
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Whybothermovingtothepeak?
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CCATvs.ALMAsites:medianH2O0.6vs.1mm,τ(350µm)=1.1vs.1.7⇒factorof2insensi-vity
CCAT
5100misgood,5600misbener!
SubmillimetersensiTvityisallaboutatmospherictransmission.
MKeaSPoleALMACCAT
Radford&Peterson,arXiv:1602.0879Cortes,Reeves,Bustos,arXiv:1609.01252
CerroChajnantor
ALMAPlateau
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MedianZenithTransmission
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CCATmediantransmissionbenerthanSPduetowarmer,
lessdenseatmosphere.Drawback:δTB
450µm
CCAT5600mSPole2650mALMA5000mMKea4100m
350µm
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ChajnantorSiteopensupTHzWindows
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250–200µm
CCAT10%25%50%ALMA50%MKea50%
τ<1
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Crossed-DragoneOpTcsDesign
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P-camBeam7opTcstubereceiver
ConceptbyC.Dragone1978Usedin“smallaperture”CMBexperiments(QUIET,AtacamaB-ModeSearch,QUIJOTE)Designsfor“largeapertures”tomaptheCMB~10xfaster(Niemack2016,AppliedOpTcs)WorkingwithSimonsObservatoryontelescopeandreceiveropTcsdesigns6maperturecoma-correctedf/2.6designforbothprojects(Parshley,Hills,Mauskopf,Dicker,Gallardoandothers)
highthroughput,8degfield-of-view,flatfocalplane,zerogeometricblockage
tote
lescop
e
Lyotstop(FPIforspectrometer)
OpTcstubeinstrumentmodule
Siliconlenses 20cmfilters
Detectorarray3-waferarraysin45cmopTcstubes
window
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Prime-Cam
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• 7instrumentmodulesor“opTcstubes”populatedwithTES/KIDarrays
• EachtubeFoVupto~1.3degree• Moduldesignunderdevelopment
withSimonsObservatoryenablesupgrades
Planforfirst3op=cstubes:2broadband(bb)onespectrometer(sp)
firstlightcamera
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• Feedhorn-coupledmulTchroicTESarrayswith4bandsperfeedhorn:740,860,1100,1300µm
• FeedhorncoupledMKIDarrayat350µm(NIST)
• 3x15cmfeeddetectorarraysTledineachopTcstube
Danaetal.2016
DetectorconceptforPrime-Cam
3-waferopTcstube
(withNIST,Michigan,Stanford/SLAC,andothers)
Heritage:AdvancedACTPolBLAST-TNG
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Fabry-PerotInterferometerforIntensityMapping
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Heritage:FPIat112µmforHIRMESonSOFIA
17January2017
Scan185-440GHzrangein4bandsacross~1deg2peropTcstubesimultaneously
! [CII]158µmatz=3.3-9.3! [OIII]88µmatz>6.7! CO2-1andhigheratvirtuallyanyz
CCAT-Prime
FPIforspectrometeratPrime-CammoduleLyotstop
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• Heterodyne,dualfrequencyarray• 500GHz(600μm)and850GHz(350μm):CO4-3,7-6[CI]2-1,1-0• 64pixels(baseline),128pixels(goal)ineachband
GalacTcEcologyinstrument:CCATHeterodyneArrayInstrument“CHAI”
Graf,Stutzkietal.
Dichroicspliner
17January2017 CCAT-Prime
1
Shutter
Mirrors M1 & M2
Elevation Housing
Yoke Structure
Support Cone
Subordinatereceivermount
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Crossed-DragoneOpTcsDesignhighthroughput,8degfield-of-view,flatfocalplane,zerogeometricblockagetelescopeemissivity<2%,totalsystememissivity<7%
coma-correctedf/2.6with5.5mfreeaperture
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1
Shutter
Mirrors M1 & M2
Elevation Housing
Yoke Structure
Support Cone
CCAT-prime designedandbuiltbyVertexAntennentechnikGmbH,Duisburg
4x5minstrumentspaceca.300t,9pieces
preassemblyinDuisburg
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CCAT-primeSchedule
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Telescope:4yearconstruc=on(6/2017to6/2021)- 20monthsdetaileddesign- 13monthsfabricaTonincl.trialassemblyinDuisburg- 3monthsshipping&receiving- 12monthsassembly/checkoutCamerasunderdesign&construcTon,$€sTllbeingraised(NSF:MSIP,DFG:SFB,...)Possiblepla_ormforCMB“StageIV”surveyinfutureProjecthasstarted,buts0llwelcomesnewpartners.
www.ccatobservatory.org
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CCAT-Prime 3217January2017
Prime-Cam
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CCAT-Prime 3317January2017
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CCAT-Prime 3417January2017 M.Viero
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IntensityMappingof[CII]throughoutEoR
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Measurelarge-scalespaTalfluctuaTonsoffaintgalaxiesvia[CII]158µmline.
RevealstheprocessofreionizaTonandtheunderlyingdarkmanerdistribuTonoverthecosmicTmewhenthefirstgalaxiesformed.Understand topology & timescale of reionization, i.e., how and when galaxies first formed, the properties of sources of reionization.
Inverseview:combinewith21cmHI,tracingneutralISMconcentra=ons.
ResoluTonintoindividualgalaxiesnotrequired.Clusteringscale0.5-1Mpc(1-2’)atz=3.5-9,goodmatch:40”@1mm,R~400,16sqd
f(H0) ~ 1 f(H0) ~ 10-5
z ~ 12 to 5
Poten=alfornon-Gaussianitysearchesinfuture?
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CCAT-Prime 3717January2017 B.Magnelli
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1. MusttraceFIRat350µm2. LargerCCAT-paperture
pushesHerschelconfusionlimitsdownby~3
3. Need~100sqdsurveytobeatvariance.
CCAT-p
ObscuredSFoverCosmicTime
!TrackgalaxyevoluTonduringthemostacTveepochofstarformaTon.
CCAT-p Herschel
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CCAT-Prime 3917January2017
A.Mi=alJ.ErlerN.Ba=aglia
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CCAT-pclusterSZoutlook
" The spectral coverage of of CCAT-pwill be similar to Planck HFI,withroughly5-15TmesbenersensiTvity(notat860GHz),allowingseparaTonofSZeffects,dust,andforegrounds.
" CCAT-primewill be the first SZ survey experiment to provide kSZandrSZmeasurementsinlargesamples(>100)ofclusters,- to enable cosmological modeling with direct kSZ number
counts,ratherthanpairwisekSZ.- throughrSZ temperaturemeasurementsprovide independent
masscalibraTonofclusters,acrucialingredientforcosmology.
" WithoutPRISM,COrE,PIXIE:CCAT-pistheuniqueopportunity.
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GEco:GalacTcEcologyScience
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• 15”imagingover200sq.deg.scalesoftheMilkyWay,LMC,SMCtostudy:– Massbudget:[CI]tracinggastemperatureandmass– TurbulentdissipaTon:mid-high-JCO&13COtracinggasexcitaTon,shocks
• Tracingvariableflowofgasintocoresandyoungstars
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• Uniquesiteenablesuniquescience• NoveltelescopedesignmaximizessurfacebrightnesssensiTvity.ExtraordinarythroughputopTmalforlarge-areasurveyscience
• Pavingtheroad&loweringriskforalarge-aperturesubmmtelescope(atthesamesite?)
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hnps://www.eso.org/sci/meeTngs/2018/AtLAST2018.html
Effortstobuilda25-50-metersubmillimetertelescope!
Lookingahead: