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Study of Calorimeter performance using the LC full simulator

Study of Calorimeter performance using the LC full simulator. The 8th ACFA Workshop Yoshihiro 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.).

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Study of Calorimeter performance using the LC full simulator

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  1. Study of Calorimeter performance using the LC full simulator The 8th ACFA Workshop Yoshihiro 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.) …

  2. Contents • Introduction • Calorimeter geometry • Amount of materials • EM CAL Performance • HD CAL Performance • Fine segmented Cell • Study of Digital calorimeter • Summary & Future plan The 8th ACFA Workshop

  3. Standard Geometry (GLD) Muon/Iron Jupiter is Full simulator and MC truth generator Based on Geant4 Solenoid TPC Hadron Calorimeter IT VTX EM Calorimeter Forward Cal The 8th ACFA Workshop

  4. Calorimeter in Jupiter • Perform an analysis with ideal geometry to know ultimate performance. • Each tower with one HD tower (12cm12cm) and 33 EM tower (4cm4cm) 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. The 8th ACFA Workshop

  5. Calorimeter geometry Parameter List HDCal 130Layers: 6.1 0 EM + HD • Endcap Inner R = 40cm • Barrel Tower Front R = 210cm • Endcap Tower Front R = 270cm Scinti. 2mm 12cm Lead 8mm EMCal 38Layers: 27X0 Scinti. 1mm 12cm Lead 4mm Divide 33 Tower Cut Calorimeter The 8th ACFA Workshop

  6. Amount of Materials 0 X0 Radiation Length and Nuclear Interaction Length measured from interaction point to CAL front. cos cos 0 • 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) X0 cos cos The 8th ACFA Workshop

  7. 1GeV 10GeV TPC TPC HDCAL HDCAL EMCAL EMCAL Event 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. The 8th ACFA Workshop

  8. EM CAL Performance (electron) Worse resolution and non-linearity at 1GeV is due to shower stopping at the early depth of EM CAL. Linearity Energy Deposit [GeV] Energy [GeV] Deviation [%] Deviation from Linearity Energy [GeV] The 8th ACFA Workshop

  9. HD CAL Performance (pion) Deviation from Linearity Linearity (QGSP) Energy Deposit [GeV] • Large non-linearity in the low energy region. • Under investigation. Energy [GeV] The 8th ACFA Workshop

  10. HD CAL Performance (pion) sto = 40.61.1 % con = 7.10.3 % sto = 38.01.2 % con = 9.00.8 % sto = 39.31.2 % con = 8.40.6 % sto = 44.91.4 % con = 4.30.4 % sto = 46.330.35 % con = 0.90.4 % • QGSP : • LHEP : • No Sol : (QGSP) • Front Cal : (QGSP) • Beam Test: Beam test from NIMA 487 (2002) 291-307 Configuration is 8mm lead and 2mm sinti. No EM Detector The 8th ACFA Workshop

  11. Fine segmented Cell • Set new CAL geometry • EM CAL divided 1212, Cell size = 0.83 ~ 0.92cm • HD CAL divided 1212, Cell size = 0.92 ~ 1.4cm • Use Hadron PhysicsList: QGSP • To study coarser segmentation, we sum the energy deposits in adjacent cells. The 8th ACFA Workshop

  12. Event Display (single pion) pink -> electron blue -> muon yellow -> photon red -> pi black -> K0L green -> proton purple -> neutron gray -> other • Incident particle: -100GeV • Exact hits of TPC and merged hits of CAL are displayed. • Color shows which particle makes hit. Cell Size=EM 4cmx4cm, HD=12cmx12cm Cell Size = 1cmx1cm HDCAL HDCAL TPC TPC EMCAL EMCAL The 8th ACFA Workshop

  13. 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. Digital calorimeter 10GeV # of hits Measured hits Linearity Energy [GeV] The 8th ACFA Workshop

  14. Definition of hit Fraction of # of hits in a cell [%] # of hits in a cell” is defined by the # of original particles incident onto the calorimeter which cause the cell hit. 2 particles 1 particle # of hits in a cell • 1cm1cm: single hit ~100 % • 2cm2cm: single hit ~70% • Large difference between 1cm 1cm and 2cm2cm. • Segmentation should be < 2cm2cm. Blue cell is 1 hit Red cellis 2 hits The 8th ACFA Workshop

  15. Summary & 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 2cm2cm is favorable for PFA. • We plan to study the calorimeter clustering with digital calorimeter. The 8th ACFA Workshop

  16. Buck up The 8th ACFA Workshop

  17. Jupiter/Satellites Concepts For real data Tools for simulation Satellites LEDA URANUS JUPITER Input/Output module set IO JLC Unified Particle Interaction and Tracking EmulatoR Unified Reconstructionand ANalysis Utility Set Library Extention forData Analysis METIS Monte-Calro Exact hits To Intermediate Simulated output Geant4 based Simulator JSF/ROOT based Framework MC truth generator Event Reconstruction Used Geant4.7.0.p01 and root.4.03.04 The 8th ACFA Workshop

  18. HD CAL Performance • QGSP : • LHEP : • LCPhysics : • No Sol : (QGSP) • Front Cal : (QGSP) • Beam Test: sto = 40.61.1 % con = 7.100.29 % sto = 38.01.2 % con = 9.020.79 % sto = 25.71.3 % con = 17.420.43 % sto = 39.31.2 % con = 8.370.55 % sto = 44.91.4 % con = 4.290.38 % sto = 46.330.35 % con = 0.840.38 % Beam test from NIMA 487 (2002) 291-307 Configuration is 10mm lead and 2.5mm sinti. The 8th ACFA Workshop

  19. Definition of hit • “# of hits in a cell” is defined by the # of original particles incident onto the calorimeter which cause the cell hit. Scintillator 2 particles 1 particle Blue cell is 1 hit Red cellis 2 hits The 8th ACFA Workshop

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