The Simulation Status of SDHCAL Ran.Han 2011.05.20 IPNL

Outline Motivation Standalone Geant4 Simulation Realistic geometry of prototype Realistic properties of GRPC ILD Global Simulation Mokka GRPC @ Videau and Tesla Model The implantation of digitizer Summary 2

Motivation Hardware: Need to be able to resolve energy deposits from different particles Highly granular detectors(as studied in )CALICE Software: Need to be able to identify energy deposits from each individual part Sophisticated reconstruction software 3 Particle Flow Algorithm = HARDWARE+SOFTWARE

Green: finish Red: in progress Yellow: future Purple : Summary Overview of SDHCal Software Green: finish Red: in progress Yellow: future Purple : Summary Standalone G4 Mokka Marlin Analysis Realistic geometry of prototype Update VIDEAU The digitizer to Marlin Videau in Pandora Cosmic Q feed , Pad Multiplicity && Efficiency Comparison (TB) Implant GRPC to TESLA for Barrel part 3 thresholds and energy calibration constants MST, Fractal analysis Charge Distribution with heavy ionizing particles Endcap and Endcap ring in TESLA &&VIDEAU Verify by Standalone and ILD software In/off-time neutrons, Hough transform Transfer prototype to Mokka Digitizer to Mokka (to be discussed ) Neural Network for energy calibration Realistic simulation of GRPC Properties/Stru GRPC in both Mechanical models The xml file for analysis is ready About to distribute the algorithms

Standalone GEANT4 properties description of SDHCAL in simulation :Lightweight; Flexible Easy comparison with prototype, number of layer, with/WO absorber Beam DIF gas H.V 40 units: 2 cm absorber+0.6cm sensitive medium 1 cm2 readoutpad 5

GEANT4 Simulation Realistic Geometry Simulation : GRPC, electronics , TB profile Test Beam 6 DIF: 1-3 ASIC: 1-48 PAD:1-64 Next: How to get induced charge? Cosmic measurement

Charge in each pad ----The charge density distribution Total Q Distribution 1: Simulate RPC physics process (first principle) 2: Get from data , extract parameters in Polya function from Data (F.Sulia, Gas Detectors,2009) Charge(pC) Polya-distribution: Cosmic Charge Polya Fit 7400V Polya Fitting average accumulated charge Next : pad multiplicity– number of hit pads for one track going through Charge in each pad ----The charge density distribution 7

KIRK T. MCDONALD’s lecture 1D and 2D Q Density Distribution KIRK T. MCDONALD’s lecture -0.25cm 1.0cm d Dispatching induced charge on more than one pad for tracks on the pad border. Parameter a tuned to data 8 a=0.12cm  d~0.25cm

Comparison With TB Efficiency and Pad Multiplicity gas gap a=0.24cm Standalone GEANT4 prototype simulation 9

for the future linear collider. Mokka (Global Simulation for ILC) Mokka is a full simulation using Geant4 and a realistic description of a detector for the future linear collider. 10 Tesla SHcalRPC02: Keep AHCal information added SDHCal BOTH RPC AND SCINTILLATOR Videau SHcalRPC01 ONLY RPC

Single muon Check: Geometry Correct

Geantino Check: GRPC Inside 1 -844 -1.9e+03 365 4e+04 0 2.11e+03 2.11e+03 BarrelHcalModule Transportation 2 -853 -1.92e+03 369 4e+04 0 21.8 2.13e+03 physiRPCFree Transportation 3 -853 -1.92e+03 369 4e+04 0 0.402 2.13e+03 physiRPCmylarCathode Transportation 4 -853 -1.92e+03 369 4e+04 0 0.196 2.13e+03 physiRPCGraphiteCathode Transportation 5 -853 -1.92e+03 369 4e+04 0 0.0544 2.13e+03 physiRPCThickGlass Transportation 6 -854 -1.92e+03 369 4e+04 0 1.2 2.13e+03 physiRPCGap Transportation 7 -854 -1.92e+03 370 4e+04 0 1.31 2.14e+03 physiRPCThinGlass Transportation 8 -855 -1.92e+03 370 4e+04 0 0.761 2.14e+03 physiRPCGraphiteAnode Transportation 9 -855 -1.92e+03 370 4e+04 0 0.0544 2.14e+03 physiRPCmylar Transportation 10 -855 -1.92e+03 370 4e+04 0 0.0544 2.14e+03 physiRPCPCB Transportation 11 -855 -1.92e+03 370 4e+04 0 1.31 2.14e+03 physiRPCElectronics Transportation 12 -856 -1.93e+03 370 4e+04 0 1.74 2.14e+03 BarrelHcalModule Transportation

Shoot only Crack part in Barrel Performance Comparison with Two Different Geometry Shoot only Crack part in Barrel Shoot global in Barrel 1000 K0_Long Events 1000 K0_Long Events Shoot global in Barrel Same: GRPC, Digitization, Marlin Process, Pandora Setting

How to use all these models Is available in ILD Software V01-11 The file in init.macro like /Mokka/init/detectorModel ILD_01pre00 /Mokka/init/EditGeometry/rmSubDetector SHcalSc03 /Mokka/init/EditGeometry/addSubDetector SHcalRpc02 110 (TESLA) #/Mokka/init/EditGeometry/addSubDetector SHcalRpc01 110 (VIDEAU) #/Mokka/init/globalModelParameter Hcal_sensitive_model scintillator /Mokka/init/globalModelParameter Hcal_sensitive_model SDRPC /Mokka/init/globalModelParameter Hcal_cells_size 10 /Mokka/init/initialMacroFile mac.mac /Mokka/init/lcioFilename pion.slcio /Mokka/init/MokkaGearFileName pion.xml

Status of Digitizer in Marlin Setup GRPC digitization start from Polya function : SimpleGRPCDigitization Sum charges of Multiply particles in one cell For pad multiplicity : the location of the track in one cell not know 1)Using the SimCalorimeterHit to know the number of particles in one cell, and randomly draw the location in the cell 2) Simulating 1mm2 cells and transform them into a 1cm2 cell in the Marlin processor (See Manqi’s talk yesterday) 3) Using LCIO v2 to keep this information in Mokka output

Thank you for your attention! Summary Standalone Geant4 Simulation 1- Realistic GEANT4 Simulation of Prototype 2- Efficiency, PadMulti Comparison with data-> Realistic simulation of GRPC Properties Mokka Simulation 1- Realistic two HCAL structure in Mokka for GRPC 2- Compared the difference of cracks part between two structure Thank you for your attention! 16

Back up

Cosmic Measured Q Distribution 1: Simulate RPC physics process (first principle) 2: Get from data , extract parameters in Polya function from Data (F.Sulia, Gas Detectors,2009) 32cm*8cm GRPC 0.12cm preamp gate QDC Scintillator Charge Spectrum Cosmic Test Set Up 64 Channels, trigger area < Channel area Analog readout 18

Q Density Distribution Formula a; the gas gap, q; the total charge getting from polya function we take it as point charge d ; the location of q. The potential in gap can be expressed from lecture: http://puhep1.princeton.edu/~mcdonald/examples/ph501/ph501lecture4.pdf a=2d 19

Cosmic measured Q distribution Software Strategy Standalone GEANT4 Simulation Test Beam Data GRPC Digitization ILC Global MOKKA in Videau && Tesla ILD Analysis Marlin &&Pandora Cosmic measured Q distribution

K0_Long: Videau vs Tesla Only shoot to Crack Part 60GeV K0_Long Blue: Tesla Crack RMS90=4.69 Mean=55.2 Red: Tesla Crack RMS90=9.25 Mean=48.05 20GeV K0_Long Blue: Tesla Crack RMS90=3.11 Mean=16.4 Red: Tesla Crack RMS90=2.49 Mean=18.4