Study of Calorimeter Study of Calorimeter performance using the LC full performance using the LC full

simulatorsimulator

The 8th ACFA WorkshopYoshihiro Yamaguchi (Tsukuba U.)

M. -C. Chang (RCNS, Tohoku U.)K. Fujii (KEK)T. Fujikawa (RCNS, Tohoku U.)S. Kim (Tsukuba U.)H. Matsunaga (Tsukuba U.)A. Miyamoto (KEK)T. Nagamine (RCA, Tohoku U.)

H. Ono (Niigata U.)A. L. C. Sanchez (Niigata U.)T. Takeshita (Shinshu U.)A. Yamaguchi (Tsukuba U.)S. Yamamoto (Graduate U.)T. Yoshioka (ICEPP, Tokyo U.)…

2005/07/12 The 8th ACFA Workshop 2

ContentsContentsIntroductionCalorimeter geometryAmount of materialsEM CAL PerformanceHD CAL PerformanceFine segmented Cell Study of Digital calorimeterSummary & Future plan

2005/07/12 The 8th ACFA Workshop 3

SolenoidSolenoid

TPCTPC

ITIT

Standard Geometry (GLD)Standard Geometry (GLD)

Muon/IronMuon/Iron

Hadron CalorimeterHadron Calorimeter

EM CalorimeterEM Calorimeter VTXVTX

Forward CalForward Cal

Jupiter is Full simulator and MC truth generatorBased on Geant4

2005/07/12 The 8th ACFA Workshop 4

Calorimeter in JupiterCalorimeter in Jupiter

Perform an analysis with ideal geometry to know ultimate performance.

Each tower with one HD tower (12cm12cm) and 33 EM tower (4cm4cm) is pointing to an interaction point.

No crack between towers.

Tower geometry and material can be modified easily.

Implement realistic geometry in the next step.

2005/07/12 The 8th ACFA Workshop 5

Parameter List

EM + HDHDCal 130Layers: 6.1 0

EMCal 38Layers: 27X0

Lead 8mm

Scinti. 2mm

Lead 4mmDivide 33

12cm

Scinti. 1mm

Cut CalorimeterTower

12cm

Endcap Inner R 　 = 40cm Barrel Tower Front R = 210cm Endcap Tower Front R = 270cm

Calorimeter geometryCalorimeter geometry

2005/07/12 The 8th ACFA Workshop 6

Amount of MaterialsAmount of Materials

Radiation Length = 0.05 ~ 0.2 X0

(5.4X0 at cos = 0) Nuclear Interaction

Length = 0.02 ~ 0.1 0

(2.8 0 at cos = 0)

Radiation Length andNuclear Interaction Lengthmeasured from interactionpoint to CAL front.

X0

X00

0

cos cos

cos cos

2005/07/12 The 8th ACFA Workshop 7

Event DisplayEvent Display (single electron)

1GeV electron incident angle to CAL is very small due to a magnetic field.

1GeV EM shower stops in the early depths in EM CAL.

1GeV1GeV

TPC

EMCAL

HDCAL

10GeV10GeV

TPC

EMCAL

HDCAL

2005/07/12 The 8th ACFA Workshop 8

EM CAL Performance (electron)EM CAL Performance (electron)

Worse resolution and non-linearity at 1GeV is due to shower stopping at the early depth of EM CAL.

Energy [GeV]

En

erg

y D

ep

os

it [

Ge

V]

LinearityLinearity

De

via

tio

n [

%]

Energy [GeV]

Deviation from LinearityDeviation from Linearity

2005/07/12 The 8th ACFA Workshop 9

HD CAL Performance (pion)HD CAL Performance (pion)

Large non-linearity in the low energy region. Under investigation.

Deviation from LinearityDeviation from LinearityLinearity (QGSP)Linearity (QGSP)

Energy [GeV]

En

erg

y D

epo

sit

[GeV

]

2005/07/12 The 8th ACFA Workshop 10

HD CAL Performance (pion)HD CAL Performance (pion)

QGSP :

LHEP :

No Sol : (QGSP)

Front Cal : (QGSP)

Beam Test:

sto = 40.61.1 %con = 7.10.3 %

sto = 38.01.2 %con = 9.00.8 %

sto = 39.31.2 %con = 8.40.6 %

sto = 44.91.4 %con = 4.30.4 %

sto = 46.330.35 %con = 0.90.4 %

Beam test from NIMA 487 (2002) 291-307Configuration is 8mm lead and 2mm sinti.No EM Detector

2005/07/12 The 8th ACFA Workshop 11

Fine segmented CellFine segmented Cell

Set new CAL geometry EM CAL divided 1212, Cell size = 0.83 ~ 0.92cm HD CAL divided 1212, Cell size = 0.92 ~ 1.4cm

Use Hadron PhysicsList: QGSP To study coarser segmentation, we sum the

energy deposits in adjacent cells.

2005/07/12 The 8th ACFA Workshop 12

Event Display (single pion)Event Display (single pion) pink -> electronblue -> muonyellow -> photonred -> piblack -> K0Lgreen -> protonpurple -> neutrongray -> other

TPC

EMCAL

HDCAL

Cell Size = 1cmx1cm

TPC

EMCAL

HDCAL

Cell Size=EM 4cmx4cm, HD=12cmx12cm

Incident particle: - 100GeV Exact hits of TPC and merged hits of CAL are displayed. Color shows which particle makes hit.

2005/07/12 The 8th ACFA Workshop 13

Digital calorimeterDigital calorimeter

Incident particle: -, 2 ~ 200GeV, 500event Select - punching through EM CAL as a MIP. Non-linearity observed in # of hits. Large constant term in energy resolution.

Energy [GeV]

Mea

sure

d h

its

# of hits

10GeV10GeV

LinearityLinearity

2005/07/12 The 8th ACFA Workshop 14

Definition of hitDefinition of hit

Blue cell is 1 hitRed cell is 2 hits

# of hits in a cellF

ract

ion

of

# o

f h

its

in a

cel

l [%

] 1cm1cm: single hit ~100 % 2cm2cm: single hit ~70% Large difference between 1cm 1cm

and 2cm2cm. Segmentation should be < 2cm2cm.

1 particle 2 particles

# of hits in a cell” is defined by the # of original particles incident onto the calorimeter which cause the cell hit.

2005/07/12 The 8th ACFA Workshop 15

Summary & Future planSummary & Future plan

HD cal simulation does not reproduce beam test results. Discrepancy is observed in the resolution constant term. Large non-linearity in the low energy region.

Need more extensive study. Cell size less than 2cm2cm is favorable for PFA.

We plan to study the calorimeter clustering with digital calorimeter.

2005/07/12 The 8th ACFA Workshop 16

Buck up

2005/07/12 The 8th ACFA Workshop 17

Jupiter/Satellites ConceptsJupiter/Satellites Concepts

JUPITERJLC Unified

Particle Interactionand

Tracking EmulatoR

IO Input/Outputmodule set

URANUSLEDA

Monte-Calro Exact hits ToIntermediate Simulated output

Unified Reconstructionand

ANalysis Utility Set

Library Extention for

Data AnalysisMETIS

Satellites

JSF/ROOT basedFramework

Geant4 basedSimulator

MC truth generator Event Reconstruction

Tools for simulation For real data

Used Geant4.7.0.p01 and root.4.03.04Used Geant4.7.0.p01 and root.4.03.04

2005/07/12 The 8th ACFA Workshop 18

HD CAL PerformanceHD CAL Performance

QGSP :

LHEP :

LCPhysics :

No Sol : (QGSP)

Front Cal : (QGSP)

Beam Test:

sto = 40.61.1 %con = 7.100.29 %

sto = 38.01.2 %con = 9.020.79 %

sto = 25.71.3 %con = 17.420.43 %

sto = 39.31.2 %con = 8.370.55 %

sto = 44.91.4 %con = 4.290.38 %

sto = 46.330.35 %con = 0.840.38 %

Beam test from NIMA 487 (2002) 291-307Configuration is 10mm lead and 2.5mm sinti.

2005/07/12 The 8th ACFA Workshop 19

Definition of hitDefinition of hit “# of hits in a cell” is defined by the # of original particles

incident onto the calorimeter which cause the cell hit.

1 particle 2 particles

Blue cell is 1 hitRed cell is 2 hits

Scintillator