[807] | 1 | // |
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| 2 | // ******************************************************************** |
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| 3 | // * License and Disclaimer * |
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| 4 | // * * |
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| 5 | // * The Geant4 software is copyright of the Copyright Holders of * |
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| 6 | // * the Geant4 Collaboration. It is provided under the terms and * |
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| 7 | // * conditions of the Geant4 Software License, included in the file * |
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| 8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
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| 9 | // * include a list of copyright holders. * |
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| 10 | // * * |
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| 11 | // * Neither the authors of this software system, nor their employing * |
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| 12 | // * institutes,nor the agencies providing financial support for this * |
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| 13 | // * work make any representation or warranty, express or implied, * |
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| 14 | // * regarding this software system or assume any liability for its * |
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| 15 | // * use. Please see the license in the file LICENSE and URL above * |
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| 16 | // * for the full disclaimer and the limitation of liability. * |
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| 17 | // * * |
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| 18 | // * This code implementation is the result of the scientific and * |
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| 19 | // * technical work of the GEANT4 collaboration. * |
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| 20 | // * By using, copying, modifying or distributing the software (or * |
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| 21 | // * any work based on the software) you agree to acknowledge its * |
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| 22 | // * use in resulting scientific publications, and indicate your * |
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| 23 | // * acceptance of all terms of the Geant4 Software license. * |
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| 24 | // ******************************************************************** |
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| 25 | // |
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| 26 | // Rich advanced example for Geant4 |
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| 27 | // HpdSiEnergyLoss.cc for Rich of LHCb |
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| 28 | // History: |
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| 29 | // Created: Sajan Easo (Sajan.Easo@cern.ch) |
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| 30 | // Revision: Patricia Mendez (Patricia.Mendez@cern.ch) |
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| 31 | ///////////////////////////////////////////////////////////////////////////// |
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| 32 | #include "HpdSiEnergyLoss.hh" |
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| 33 | #include "G4Material.hh" |
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| 34 | #include "Randomize.hh" |
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| 35 | #include "RichTbMaterialParameters.hh" |
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| 36 | #include "RichTbAnalysisManager.hh" |
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| 37 | |
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| 38 | HpdSiEnergyLoss::HpdSiEnergyLoss(const G4String& materialName, |
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| 39 | const G4String& processName) |
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| 40 | : G4VEnergyLoss(processName), |
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| 41 | MinKineticEnergy(1.*eV),MipEnergy(30000.0*eV), |
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| 42 | finalRangeforStep(0.15*mm) { |
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| 43 | ElossMaterialName= materialName; |
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| 44 | |
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| 45 | const G4MaterialTable* theMaterialTable = G4Material::GetMaterialTable(); |
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| 46 | G4int numberOfMat = G4Material::GetNumberOfMaterials(); |
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| 47 | |
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| 48 | G4int iMat=0; |
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| 49 | for(iMat=0;iMat<numberOfMat;iMat++) { |
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| 50 | if ( materialName == (*theMaterialTable)[iMat]->GetName()){ |
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| 51 | fMatIndex=(*theMaterialTable)[iMat]->GetIndex(); |
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| 52 | break; |
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| 53 | } |
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| 54 | |
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| 55 | } |
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| 56 | if(iMat >= numberOfMat ) { |
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| 57 | G4Exception("Invalid material Name in HpdSiEnergyLoss constructor" ); |
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| 58 | } |
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| 59 | } |
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| 60 | |
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| 61 | HpdSiEnergyLoss::~HpdSiEnergyLoss() { } |
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| 62 | |
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| 63 | G4bool HpdSiEnergyLoss::IsApplicable(const G4ParticleDefinition& |
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| 64 | aParticleType) { |
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| 65 | return(aParticleType.GetPDGCharge()!= 0.); |
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| 66 | } |
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| 67 | |
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| 68 | G4double HpdSiEnergyLoss::GetContinuousStepLimit(const G4Track& track, |
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| 69 | G4double, |
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| 70 | G4double, |
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| 71 | G4double& ){ |
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| 72 | |
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| 73 | G4double RangeForStep = finalRangeforStep; |
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| 74 | |
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| 75 | if( fMatIndex != G4int(track.GetMaterial() -> GetIndex()) ) { |
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| 76 | RangeForStep = DBL_MAX; |
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| 77 | } |
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| 78 | |
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| 79 | return RangeForStep; |
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| 80 | } |
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| 81 | |
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| 82 | G4double HpdSiEnergyLoss::GetMeanFreePath(const G4Track&, |
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| 83 | G4double, |
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| 84 | G4ForceCondition* condition) { |
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| 85 | // return infinity so that it does nothing. |
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| 86 | *condition = NotForced; |
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| 87 | return DBL_MAX; |
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| 88 | |
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| 89 | } |
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| 90 | |
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| 91 | G4VParticleChange* HpdSiEnergyLoss::PostStepDoIt(const G4Track& aTrack, |
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| 92 | const G4Step& aStep) { |
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| 93 | // Do nothing |
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| 94 | aParticleChange.Initialize(aTrack) ; |
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| 95 | return G4VContinuousDiscreteProcess::PostStepDoIt(aTrack,aStep); |
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| 96 | |
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| 97 | } |
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| 98 | |
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| 99 | G4VParticleChange* HpdSiEnergyLoss::AlongStepDoIt(const G4Track& aTrack, |
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| 100 | const G4Step&) { |
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| 101 | |
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| 102 | |
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| 103 | #ifdef G4ANALYSIS_USE |
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| 104 | RichTbAnalysisManager * analysis = RichTbAnalysisManager::getInstance(); |
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| 105 | #endif |
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| 106 | |
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| 107 | |
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| 108 | aParticleChange.Initialize(aTrack); |
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| 109 | G4int aMaterialIndex = aTrack.GetMaterial()->GetIndex(); |
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| 110 | if(fMatIndex != aMaterialIndex ) { |
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| 111 | return &aParticleChange; |
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| 112 | } |
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| 113 | |
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| 114 | const G4DynamicParticle* aParticle = aTrack.GetDynamicParticle(); |
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| 115 | G4double aKinEnergyInit = aParticle->GetKineticEnergy(); |
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| 116 | G4double Eloss, aKinEnergyFinal; |
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| 117 | if(aKinEnergyInit < MinKineticEnergy ) { Eloss=0.0 ; } |
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| 118 | else if( aKinEnergyInit < MipEnergy ) {Eloss= aKinEnergyInit ;} |
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| 119 | else { Eloss = MipEnergy; } |
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| 120 | |
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| 121 | aKinEnergyFinal=aKinEnergyInit-Eloss; |
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| 122 | |
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| 123 | |
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| 124 | //In the G4example the backscattering is implemented in |
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| 125 | //an adhoc manner as done below. It simply causes an |
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| 126 | // efficiency loss. |
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| 127 | |
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| 128 | G4double bckratio; |
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| 129 | if( SignalToNoiseInData > 0.0 ){ |
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| 130 | bckratio = NsigmaInPedCut/ SignalToNoiseInData ; |
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| 131 | |
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| 132 | } |
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| 133 | G4double Effs = 1.0 - backscaprob * bckratio; |
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| 134 | G4double Randbsk = G4UniformRand(); |
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| 135 | if(Randbsk <= Effs && Eloss > 0.0 ) { |
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| 136 | aParticleChange.ProposeLocalEnergyDeposit(Eloss); |
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| 137 | |
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| 138 | #ifdef G4ANALYSIS_USE |
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| 139 | |
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| 140 | analysis->bumpNumHitInSi(); |
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| 141 | |
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| 142 | #endif |
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| 143 | |
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| 144 | // G4StepPoint* pPreStepPoint = aStep.GetPreStepPoint(); |
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| 145 | // G4String tpreVol = pPreStepPoint -> GetPhysicalVolume()->GetName(); |
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| 146 | // G4int tpreVP = pPreStepPoint -> GetPhysicalVolume()->GetCopyNo(); |
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| 147 | } |
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| 148 | if (aKinEnergyFinal <= MinKineticEnergy ) { |
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| 149 | aParticleChange.ProposeTrackStatus(fStopAndKill); |
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| 150 | |
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| 151 | }else { |
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| 152 | aParticleChange.ProposeEnergy(aKinEnergyFinal); |
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| 153 | |
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| 154 | } |
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| 155 | return &aParticleChange; |
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| 156 | |
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| 157 | } |
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| 158 | |
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