CEPCDetectorStatus&TasksforCDR

YuanningGao(TsinghuaUniversity)

IASProgramonHighEnergyPhysics,HKUST,4-29Jan2016

OnBehalfoftheCEPC-SppC Studygroup

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- White Papers

Past HEP Programs- 2015

- 2016

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Program Schedule

Updated as 20 January 2017

Dates: 9-26 January 2017

Venue: HKUST Jockey Club Institute for Advanced Study, Lo Ka Chung Building, Lee ShauKee Campus, HKUST

Week 1 | Week 2 | Week 3 (Conference Week)

Week 1

Date Time Venue Event

9 Jan (Mon) 09:00-18:00 IAS2042(2/F)

[Special Event] "Gravitational Cosmology" Meeting (Details)

11 Jan (Wed) 10:30-12:00 IAS2042(2/F)

Talk: "An Overview on Weak Gravity Conjecture"William Cottrell (University of Wisconsin - Madison)(Click here for presentation file)

14:00-15:30 Talk: "Physics of Cosmological Collider"Yi Wang (The Hong Kong University of Science andTechnology)(Click here for presentation file)

12 Jan (Thu) 10:30-12:00 IAS2042(2/F)

Talk: "Top-tagging at the Energy Frontier"Minho Son (Korea Advanced Institute of Science andTechnology)(Click here for presentation file)

14:00-15:30 Talk: "Higgs Precision and Top Quark EFT constraints atCEPC"Zhen Liu (Fermi National Accelerator Laboratory)(Click here for presentation file)

13 Jan (Fri) 10:30-12:00 IAS2042(2/F)

Talk: "The 2nd Hyper-Kamiokande Detector in Korea"Seon-Hee Seo (Seoul National University)(Click here for presentation file)

14:00-15:30 Talk: "Calorimeter Technologies for Future Colliders"Peter Loch (University of Arizona)(Click here for presentation file)

Week 2

Date Time Venue Event

16 Jan (Mon) 10:30-12:00 IAS2042(2/F)

Talk: "R&D with the Prototype of TPC for the FutureMachines"Serguei Ganjour (CEA-Saclay) (Click here for presentation file)

Outline

• Performancerequests• StatusandgoalsfordetectorR&D• Urgenttasks• PlanforCDR• Summary

YuanningGao,CEPCDetector

BTC�

IP1�

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CEPC Collider Ring(50Km)�

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PhysicsProgramatCEPC

• Baseline- 10#𝐻 @240GeV- 10&'(&&𝑍 @~91GeV- 10#(*𝑊,𝑊( @~160GeV

(w/beamenergymeasurement)• Upgradephases(optional)

- high luminosityZ-polephysics,10-.(-# cm-2s-1

- polarizedbeam(s)forZ,W- 𝑡𝑡̅ at~350GeV- …

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AdetectoratCEPC

• Thedetectordesigncouldbenefitfrom20+years’world-widestudiesforILC

• Performancerequests:

➣ extremelygoodspaceresolution➣ lowmaterialbudget

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PerformancerequirementsofILCdetectors

YuanningGao,CEPCDetector

• Vertexing– ~1/5rbeampipe,~1/30pixelsize(wrt LHC)

• Tracking– ~1/6material,~1/10resolution(wrt LHC)

• Jetenergy(Higgsself-coupling,W/Zseparation)– ~1/2resolution(wrt LHC)

3/ 25 10 / sinip m m ps µ µ q= Å

5(1/ ) 5 10 /GeVps -= ´

/ 0.3/ ( )GeVE E Es =

€

(h → bb ,cc ,τ +τ−)

€

(e+e− → Zh→ +−X; incl. h→ nothing)

or better

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AdetectoratCEPC

• Thedetectordesigncouldbenefitfrom20+years’world-widestudiesforILC

• Performancerequests:

➣ precisetracking,lowX0

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AdetectoratCEPC

• Thedetectordesigncouldbenefitfrom20+years’world-widestudiesforILC

• Performancerequests:

➣ high granularitycalorimeters➣ ParticleFlowAlgorithm(PFA)➣ lessdemandingwrt ILCdetectors

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ILD-likedesigninPreCDR

• ILD-like design asareferenceforfeasibilitystudies

- NewMDIdesign with ashorterL*=1.5m- Siliconpixelvertexdetector,striptrackers- TPCasmaintrackingdevice- Bfield3.5T- Veryhighgranularity

ECAL(0.5cmx0.5cm)HCAL(1.0cmx1.0cm)

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ILD-likedesigninPreCDR

• Notsoobviousthechallengingissuescouldberesolved…

• beamstructure- detectorcooling- vertexdetectorreadout- ionfeedbackinTPC

• Zpole- eventrate(<1kHz)- hermeticity ?- 𝜋/𝐾 separation?

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StrategiesforstudiesafterPreCDR

• Exploretechnologiesforeachsub-detectorcouldreachtheperformancerequests:ILDisjustareference

• StartingcriticalR&DlistedinPreCDR

• Meanwhile keep inmindthemachinehasnotbeenfullydefinedyet…

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VertexdetectorR&D:StatusandPlan• R&Dtarget:stillnotreachtherequest,1st step

• CMOSPixelsensor(CPS)

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VertexdetectorR&D:StatusandPlan• 1stCPSprototypedesign

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VertexdetectorR&D:StatusandPlan• 2ndCPSprototypedesign

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TPCstudies:StatusandPlan• Target

- understandtheeffectofionfeedback- GEM+Micromegas tosuppressionbackflow(0.1%)

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TPCstudies:StatusandPlan• Target

- understandtheeffectofionfeedback- GEM+Micromegas tosuppressionbackflow(0.1%)

2017-01-23 YuanningGao,CEPCDetector 14

TPCstudies:StatusandPlan• Preliminaryresultsfromsimulationstudies

- ionbacksuppressionto0.1%ispossibleà beamtestin2017-2018withGEM+Micromegas module

- occupancyisverylowevenforZ-pole- distortionbyionsacceptableupto10-4cm-2s-1

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Calorimeters:StatusandPlan• CALICEstudies

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ECALR&D:Scintillator-W

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JointheR&DactivitiesinCALICE

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Simulationstudies:Optimization

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ImpactonScintillator-WECAL?

• MDIiscrucialforCEPC.AdesignofMDIreliesonthedesignofthemachine.

PreliminarystudiesonMDI

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Exercises…

Urgenttasks

• Physics@Zà EWphjysics basedon10&'(&& Z

vs.10&5 Z(FCC-ee studies)à flavorphysics

• Beamenergymeasurementà beamdepolarizationatZ,Wà at240GeV?

• Anythingelse?

2017-01-23 YuanningGao,CEPCDetector 32

PlanforCDR

• Byinternationalcollaboration!

• 1st draftbyend2017

• OptimizationbasedonILD-likedesignasareference

• Develop2+concepts?- fullsilicontracking- driftchamber+dualreadoutcoppercalorimeter

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FundingfromMinistryofScienceandTechnology

R&D‘SonPhysicsandKeyTechnologiesforHighEnergyElectron-PositronCircularCollider• 2016.07-2021.06• 36MRMB• AcceleratorPhysics&colliderdesign 3.88• Keyacceleratortechnologies 11.60• Simulation&detectordesign 5.24• Keydetectortechnologies 15.28

AnotherMOSTfund(~40M)in2018

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Summary

YuanningGao,CEPCDetector

• ProgrammadeafterthePreCDR- R&Donkeytechnologies- needmoreeffortsonMDI(afterthemachinedesign?)- Physics@Z/W,beamenergymeasurementstobestudied

soon

• PlanforCDR- develop/collect(new)ideasfor2+detectorconcepts- criticalR&D

• CEPCisaninternationalproject,youareallwelcometojoinus!

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Detectortalksatthisworkshop

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