Report from ILC detector working group

Report from ILC deReport from ILC detector working grotector working gro

upup Tao HuTao Hu

Institute of High Energy PhysicsInstitute of High Energy Physics

Talk listTalk list ILD – A Large Detector for ILCILD – A Large Detector for ILC

Yasuhiro SugimotoYasuhiro Sugimoto ( (KEKKEK)) ILC TPC R&D Status Yulan Li (TsinghuILC TPC R&D Status Yulan Li (Tsinghu

a)a) Calorimeter in ILC T. Takeshita (ShinshCalorimeter in ILC T. Takeshita (Shinsh

u)u) Software tools forSoftware tools for ILC StudiesILC Studies

Akiya Miyamoto (KEK) Akiya Miyamoto (KEK) Heavy Scintillating Glasses for Future High Energy PHeavy Scintillating Glasses for Future High Energy P

article Physics Experimentsarticle Physics ExperimentsChun Jiang (Jiao Tong)Chun Jiang (Jiao Tong)

Performance goal

Vertex Detector Impact param. res. : b = 5 10/(psin3/2) m

Charm and ID is important : c ~ 100 m >> b

Tracker pt/pt2 = 5x10-5 /GeV

Calorimeter Jet energy resolution : Ej/Ej = 30%/Ej1/2

Hermeticity Forward coverage down to ~5 mrad

or Ej/Ej = 3 - 4 %

Yasuhiro Sugimoto

Detector concepts for ILC Four Detector Concepts: GLD, LDC, SiD, 4th

Three of them (GLD, LDC, SiD) are optimized for “PFA” Measure energy of each particle in a jet separately: Charged

particles by tracker, s by ECAL, and neutral hadrons by HCAL Larger BRCAL

2 is preferable to separate charged tracks in the 　calorimeter

Calorimeter should have fine granularity

Yasuhiro Sugimoto

Detector features

GLD LDC SiD 4-th

Tracker TPC + Si-strip TPC + Si-strip Si-strip TPC or DC

CalorimeterPFA

Rin=2.1m

PFA

Rin=1.6m

PFA

Rin=1.27m

Compensating

Rin=1.5m

B 3T 4T 5T3.5T

No return yoke

BRCAL2 13.2 Tm2 10.2 Tm2 8.1 Tm2 (non-PFA)

Estore 1.6 GJ 1.7 GJ 1.4 GJ2.7 GJ

Dual solenoid

SizeR=7.2m

|Z|=7.5m

R=6.0m

|Z|=5.6m

R=6.45m

|Z|=6.45m

R=5.5m

|Z|=6.4m

Yasuhiro Sugimoto

Integration of GLD/LDC into ILD ILC Detector Roadmap

Convergence of detector concepts from 4 to 2 by the end of next year in order to concentrate limited resources into engineering design activities Oct. 2007: LOI call by ILCSC Oct. 2008: LOI submission End of 2008: Two detectors for EDR are defined by IDAG

By July 2010: Two Detector Engineering Design Reports (EDR) GLD and LDC have similar concept

Calorimeter optimized for PFA TPC as the central tracker for excellent pattern recognition

GLD and LDC agreed to write a single common LOI Study for the common design (ILD) has started

Yasuhiro Sugimoto

Expected performance

Impact parameter resolution

5065

100

15

80

CCD

R-Z View

Layer R (mm)

1 20

2 22

3 32

4 34

5 48

6 5080m Si-equivalent

per layer is assumed

GLD study

Performance goal achieved

Yasuhiro Sugimoto


Momentum resolutionGLD study SiD study

Performance goal achieved

Yasuhiro Sugimoto


PFA performance

E (GeV)

45 4.4 0.295

100 3.1 0.305

180 3.1 0.418

250 3.4 0.534

)//( EEE (%)/ EE

Jet-energy resolution study by M.Thomson for LDC00 (BR2=11.6 : Larger than latest LDC)

Performance goal almost achieved

Yasuhiro Sugimoto

ILD study activity

Mandate To write a Letter of Intent (LoI) to produce a

detector Engineering Design Report (EDR) Milestones

May 2008: Define the baseline parameter set for the unified detector

Oct.1,2008: Submit LoI

Yasuhiro Sugimoto

ILD organization Joint steering board members selected in July 2008

T.Behnke, D.Karlen, Y.Sugimoto, H.Videau, G.Wilson, H.Yamamoto

Our effort is now focused on unification of GLD/LDC and defining the optimized parameters of the ILD

At present, we don’t have sub-groups for sub-detectors specific to ILD (contrasting to SiD)

Information of sub-detectors will be obtained from existing horizontal collaborations (LC-TPC, CALICE, SiLC, etc.)

For the design of ILD, three working groups are organized Detector optimization W.G. (M.Thomson, T.Yoshioka) MDI/Integration W.G. (K.Busser, T.Tauchi) Cost W.G. (A.Maki, H.Videau)

Yasuhiro Sugimoto

CCAST ILC Workshop

Nov. 5-7, 2007, IHEP, Beijing, China.

CCAST ILC Workshop


2 sint t tp p a b p

Requirements　from　ILC• LCTPC　has　to　provide　good　momentum　resolution

– Precise　model　independent　Higgs　mass　measurement:

– Local position resolution requirements for TPC–GLD: 150 m; LDC: 100 m

Yulan LiYulan Li

CCAST ILC Workshop


•GEM

–Advantage•By using multiple GEMs

– Good ion feedback suppression

– Low discharge probability–Disadvantages

•Flatness problem, gain fluctuation

•Solid support structure needed

TPC　readout　Technologies　(Cont.)• Micromegas

–Disadvantages• The narrowness of the sign

al (“standard”)• High discharge probability

–Advantages• Intrinsically flat (pillows)• No large support structure n

eeded

• Difference: Micromegas produce narrower signal than GEM

• Bottom line: both seem feasible, both still need more R&D

Yulan LiYulan Li

CCAST ILC Workshop


TPC　readout　Technologies　(Cont.)

Tsinghua TU-TPC

Yulan LiYulan Li

CCAST ILC Workshop


Tsinghua

Yulan LiYulan Li

CCAST ILC Workshop


Yulan LiYulan Li

CCAST ILC Workshop


Phase　1　R&DGEM　feasible

Phase　1　R&DGEM　feasible

Yulan LiYulan Li

CCAST ILC Workshop


Phase　1　R&DMicromegas　with　resisitive　anode　feasible

Phase　1　R&DMicromegas　with　resisitive　anode　feasible

Yulan LiYulan Li

CCAST ILC Workshop


Phase　1　R&DPixel　“proof　of　principle”

Phase　1　R&DPixel　“proof　of　principle”

• Reconstruct a track electron by electron (or cluster by cluster)

• ASIC: MediPix2, 55 x 55 m2

• Small residua: 50-60 m

GEM+Pixel

Yulan LiYulan Li

CCAST ILC Workshop


LCTPC　milestonesLCTPC　milestones

2006-2010 Continue LCTPC R&D via small-prototypes

and LP test

2011 Decide on all parameters

2012 Final design of the LCTPC

2016 Four years construction

2017-18 Commission/Install TPC in the ILC Detector

2006-2010 Continue LCTPC R&D via small-prototypes

and LP test

2011 Decide on all parameters

2012 Final design of the LCTPC

2016 Four years construction

2017-18 Commission/Install TPC in the ILC Detector

Yulan LiYulan Li

T. TakeshiT. Takeshitata


6 November 2007 CIAW07, Akiya Miyamoto

Jet　Measurements　in　ILC　Det.

Particle　reconstruction　 Charged particles in tracking DetectorPhotons in the ECALNeutral hadrons in the HCAL (and possibly ECAL)b/c ID: Vertex Detector

Large detector – spatially separate particles High B-field – separate charged/neutrals High granularity ECAL/HCAL – resolve particles

For good jet erg resolution Separate energy deposits from different particles

6 November 2007 24CIAW07, Akiya Miyamoto








Our Proposal

To replace the structure of metal and plastic scintilaltor plates by scintillating glass blocks that glued together to form homogeneous modules. It will be - A total absorption calorimeter for optimum resolution

- Can combine the functions of EM and Hadron Colorimeters

A total absorption hadron calorimeter can have excellent energy resolution because it provide several ways to measure energies required to break up nuclei, which is mostly “invisible” in a sampling hadron calorimeter since such energy is mostly absorbed by the inactive metal plates.

Chun JiaChun Jiangng

Two OptionsOption 1:A conventional scintillation calorimeter that reads the scintillation light only

Hadron energy that is invisible in a sampling calorimeter can be recovered by observing ionization energies from heavy nuclei fragments, spallation protons, ’s released by fast neutron inelastic scatterings and recoiling nuclei due to fast neutron elastic scatterings, and energies released by thermalized neutrons captured by the calorimeter media

Option 2:A dual readout calorimeter that reads the scintillation light and cherenkov light separately. Compensation for the invisible energy can be achieved by this method.

See the reference

http://ilcagenda.linearcollider.org/contributionDisplay.py?contribId=202&session

Id=45&confId=1556


B2O3-SiO2-Gd2O3-BaO 30:25:30:15

doped with Ce2O3 or other dopantsChun Jiang, QingJi Zeng, Fuxi Gan,Scintillation luminescence of cerium-doped borosil

icate glass containing rare-earth oxide, Proceedings of SPIE, Volume 4141, November 2000, pp. 316-323

• Density 5.4 g/cm3 is sufficient for an ILC calorimeter

• Contains a large amount of thermal neutron isotopes

boron and gadolinium

• Will capture thermalized neutrons in a short time and in close proximity to hadron showers providing a mean for recovering invisible energies in hadron showers

Our Proposed BSGB Scintillating GlassChun JiaChun Jiangng

http://spiedl.aip.org/vsearch/servlet/VerityServlet?KEY=SPIEDL&possible1=Jiang%2C+Chun&possible1zone=author&maxdisp=25&smode=strresults&aqs=true

http://spiedl.aip.org/vsearch/servlet/VerityServlet?KEY=SPIEDL&possible1=Zeng%2C+QingJi&possible1zone=author&maxdisp=25&smode=strresults&aqs=true



http://spiedl.aip.org/vsearch/servlet/VerityServlet?KEY=SPIEDL&possible1=Gan%2C+Fuxi&possible1zone=author&maxdisp=25&smode=strresults&aqs=true



BSGB Glass

Density 5 - 5.5 g/cm3

Light yield ~500 ’s/MeV (?)

Decay time 60 - 80 ns

Scintillation wavelength 460 nm

Radiation length 1.8 cm

Interaction length 20 - 25 cm (estimate)

Some Properties of the BSGB Glass


36

BSGB Glass

Scintillation Light Yield (80 keV X-ray excitation)



ROOT objects : Event Tree & Configuration

Our　software　tools

BeamtestAnalysis

EventReconstruction

Digitizer Finder Fitter

DetectorSimulator QuickSim FullSim

EventGenerator

Pythia CAIN StdHep

PhysicsAnalysis

Jet finder

Link to various tools at http://acfahep.kek.jp/subg/sim/soft GLD Software at http://ilcphys.kek.jp/soft All packages are kept in the CVS. Accessible from http://jlccvs.kek.jp/



Description Detector Language IO-Format Region

Simdet Fast　Monte　Carlo TeslaTDR Fortran Stdhep/LCIO EU

SGV Fast　Monte　Carlo flexible C++ None(LCIO) EU

Lelaps Fast　Monte　Carlo SiD,　flexible C++ SIO,　LCIO US

QuickSim Fast　Monte　Carlo GLD Fortran ROOT Asia

Brahms-Sim Full　sim.　-　Geant3 TeslaTDR C++ ASCII,　LCIO EU

Mokka Full　sim.　–　Geant4 TeslaTDR,　LDC C++ LCIO EU

SLIC Full　sim.　–　Geant4 SiD C++ LCIO US

ILC-ROOT Full　sim.　–　Geant4 4th C++ ROOT US+EU

Jupiter Full　sim.　–　Geant4 GLD C++ ROOT,　LCIO Asia

Brahms-Reco

Reconstruction　framework TeslaTDR Fortran LCIO EU

Marlin Reconstruction　Analysis　framework

Flexible,LDC C++ LCIO EU

Org-lcsim Reconstruction　packages SiD(flexible) Java LCIO US

Satellites Reconstruction　packages GLD C++ ROOT Asia

LCCD Conditions　data　toolkit LDC,　SiD,　.. C++ MySQL,　LCIO EU

GEAR Geometry　Description Flexible C++ XML EU

LCIO Persistency/Data　model All C++,Java,Fortran

- EU,US,Asia

JAS3/WIRED Analysis　tool/Event　display LDC,　SiD　… Java XML,LCIO,stdhep,　heprep,

US,　EU

JSF Analysis　framework All C++ ROOT/LCIO Asia

Software　tools　in　the　world



Jupiter/Satellites　for　　Full　Simulation　Studies

JUPITERJLC Unified

Particle Interactionand

Tracking EmulatoR

IOInput/Outputmodule set

URANUS

LEDA

Monte-Carlo Exact hits ToIntermediate Simulated output

Unified Reconstructionand

ANalysis Utility Set

Library Extension for

Data Analysis

METISSatellites

Geant4 basedSimulator

JSF/ROOT basedFramework

JSF: the analysis flow controller based on ROOT The release includes event generators, Quick Simulator, and simple event display

MC truth generator Event Reconstruction

Tools for simulation Tools For real data



GLD　Geometry　in　Jupiter

FCAL

BCAL

IT

VTX

CH2mask1 module

Include 10cm air gap as a readout space



GLD　PFA　Performances( ) 91.2　for Z qq light quark only at s GeV

~ 30% / | cos | 0.9f orE

Using　1x1cm2　calorimeter　cell　size

Ejet/Ejet　　　is　uniform　except　very　forwarddoes　not　change　significantly　for　ECAL　cell　size　of　1x5cm2

　is　worse　for　higher　energy　jets　


LDC00　

PandoraPFA A　detailed　and　highly　tuned　algorithm　　

– Topology　based　cluster　merging– Identify　photons,　merged　tracks,　

backscatters,　MIP　segments　– Perform　iterative　re-clustering　as　

needed,　using　track　momentum

Won’t　merge

Won’t　merge

Could　getmerged

30 GeV12 GeV

18 GeV

10 GeV Track


Detector　OptimizationZuds　pair　events　are　used　for　detector　optimization

PandoraPFA:　B　dep.　for　100　GeV　jets

SiD　like

LDC　like

GLD　like

PandoraPFA:　ECAL　segmentation　　　

GLD　PFA:　Dep.　on　ECAL　Rin

　Larger　ECAL　Rin　performs　better　　　(　R　is　slightly　more　important　　　　　than　BR2　rule)　Further　studies　on　physics　channels　　　are　awaited.



Physics　performanceStudies　of　physics　performances　by　full　simulations　have　been　started.

　Preliminary　result　by　GLD-PFA,　　　　including　ISR/BS,　and　b-tag.　mH　offset　and　wide　(mH)　are　seen.　　　　Study　is　in　progress　to　improve　them.

/e e ZZ ZH bb

2

350 ,

120 /H

s GeV

m GeV c

GLD　Cheated　PFA　Analysis

　,　ISR,　undetected　particles,　and　Edouble　count　are　main　contributor　to　(mH).　　After　correct　them,　it　is　same　as　Z0　case



Physics　Performance　-2　, ,e e ZH Z qq H bb 500 , 120Hs GeV m GeV


SummarySummary GLD and LDC spontaneously merged into ILD and will write GLD and LDC spontaneously merged into ILD and will write

a common LOIa common LOI More detail on TPC and CMore detail on TPC and Calorimeter alorimeter R&DR&D A total absorption E/H calorimeter with heavy scintillating A total absorption E/H calorimeter with heavy scintillating

glasses proposedglasses proposed Software tools based on ROOT and Geant4 have been develoSoftware tools based on ROOT and Geant4 have been develo

ped and extensively used for GLD studiesped and extensively used for GLD studies

Documents

Report from ILC detector working group