[819] | 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 | // |
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[1055] | 27 | // $Id: G4VRangeToEnergyConverter.cc,v 1.10 2009/04/02 02:43:42 kurasige Exp $ |
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| 28 | // GEANT4 tag $Name: geant4-09-03-beta-cand-01 $ |
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[819] | 29 | // |
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| 30 | // |
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| 31 | // -------------------------------------------------------------- |
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| 32 | // GEANT 4 class implementation file/ History: |
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| 33 | // 5 Oct. 2002, H.Kuirashige : Structure created based on object model |
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| 34 | // -------------------------------------------------------------- |
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| 35 | |
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| 36 | #include "G4VRangeToEnergyConverter.hh" |
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| 37 | #include "G4ParticleTable.hh" |
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| 38 | #include "G4Material.hh" |
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| 39 | #include "G4PhysicsLogVector.hh" |
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| 40 | |
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| 41 | #include "G4ios.hh" |
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| 42 | |
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| 43 | // energy range |
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| 44 | G4double G4VRangeToEnergyConverter::LowestEnergy = 0.99e-3*MeV; |
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| 45 | G4double G4VRangeToEnergyConverter::HighestEnergy = 100.0e6*MeV; |
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| 46 | |
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| 47 | G4VRangeToEnergyConverter::G4VRangeToEnergyConverter(): |
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| 48 | theParticle(0), theLossTable(0), NumberOfElements(0), TotBin(200), |
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| 49 | verboseLevel(1) |
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| 50 | { |
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| 51 | } |
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| 52 | |
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| 53 | G4VRangeToEnergyConverter::G4VRangeToEnergyConverter(const G4VRangeToEnergyConverter& right) |
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| 54 | { |
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| 55 | *this = right; |
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| 56 | } |
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| 57 | |
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| 58 | G4VRangeToEnergyConverter & G4VRangeToEnergyConverter::operator=(const G4VRangeToEnergyConverter &right) |
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| 59 | { |
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| 60 | if (this == &right) return *this; |
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| 61 | if (theLossTable) { |
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| 62 | theLossTable->clearAndDestroy(); |
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| 63 | delete theLossTable; |
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| 64 | theLossTable=0; |
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| 65 | } |
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| 66 | |
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| 67 | NumberOfElements = right.NumberOfElements; |
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| 68 | TotBin = right.TotBin; |
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| 69 | theParticle = right.theParticle; |
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| 70 | verboseLevel = right.verboseLevel; |
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| 71 | |
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| 72 | // create the loss table |
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| 73 | theLossTable = new G4LossTable(); |
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| 74 | theLossTable->reserve(G4Element::GetNumberOfElements()); |
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| 75 | // fill the loss table |
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| 76 | for (size_t j=0; j<size_t(NumberOfElements); j++){ |
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| 77 | G4LossVector* aVector= new |
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| 78 | G4LossVector(LowestEnergy, HighestEnergy, TotBin); |
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| 79 | for (size_t i=0; i<size_t(TotBin); i++) { |
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| 80 | G4double Value = (*((*right.theLossTable)[j]))[i]; |
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| 81 | aVector->PutValue(i,Value); |
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| 82 | } |
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| 83 | theLossTable->insert(aVector); |
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| 84 | } |
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| 85 | return *this; |
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| 86 | } |
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| 87 | |
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| 88 | |
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| 89 | G4VRangeToEnergyConverter::~G4VRangeToEnergyConverter() |
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| 90 | { |
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| 91 | if (theLossTable) { |
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| 92 | theLossTable->clearAndDestroy(); |
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| 93 | delete theLossTable; |
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| 94 | } |
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| 95 | theLossTable=0; |
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| 96 | } |
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| 97 | |
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| 98 | G4int G4VRangeToEnergyConverter::operator==(const G4VRangeToEnergyConverter &right) const |
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| 99 | { |
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| 100 | return this == &right; |
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| 101 | } |
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| 102 | |
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| 103 | G4int G4VRangeToEnergyConverter::operator!=(const G4VRangeToEnergyConverter &right) const |
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| 104 | { |
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| 105 | return this != &right; |
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| 106 | } |
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| 107 | |
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| 108 | |
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| 109 | // ********************************************************************** |
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| 110 | // ************************* Convert *********************************** |
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| 111 | // ********************************************************************** |
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| 112 | G4double G4VRangeToEnergyConverter::Convert(G4double rangeCut, |
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| 113 | const G4Material* material) |
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| 114 | { |
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| 115 | G4double Mass = theParticle->GetPDGMass(); |
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| 116 | G4double theKineticEnergyCuts = 0.; |
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| 117 | |
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| 118 | // Build the energy loss table |
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| 119 | BuildLossTable(); |
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| 120 | |
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| 121 | // Build range vector for every material, convert cut into energy-cut, |
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| 122 | // fill theKineticEnergyCuts and delete the range vector |
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| 123 | G4double tune = 0.025*mm*g/cm3 ,lowen = 30.*keV ; |
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| 124 | |
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| 125 | G4int idx = material->GetIndex(); |
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| 126 | G4double density = material->GetDensity() ; |
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| 127 | if(density > 0.) { |
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| 128 | G4RangeVector* rangeVector = new G4RangeVector(LowestEnergy, HighestEnergy, TotBin); |
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| 129 | BuildRangeVector(material, HighestEnergy, Mass, rangeVector); |
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| 130 | theKineticEnergyCuts = ConvertCutToKineticEnergy(rangeVector, rangeCut, idx); |
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| 131 | |
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| 132 | if( ((theParticle->GetParticleName()=="e-")||(theParticle->GetParticleName()=="e+")) |
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| 133 | && (theKineticEnergyCuts < lowen) ) |
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| 134 | |
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| 135 | // corr. should be switched on smoothly |
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| 136 | { theKineticEnergyCuts /= (1.+(1.-theKineticEnergyCuts/lowen)* |
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| 137 | tune/(rangeCut*density)); } |
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| 138 | if(theKineticEnergyCuts < LowestEnergy) { |
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| 139 | theKineticEnergyCuts = LowestEnergy ; |
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| 140 | } |
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| 141 | delete rangeVector; |
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| 142 | } |
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| 143 | |
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| 144 | return theKineticEnergyCuts; |
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| 145 | } |
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| 146 | |
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| 147 | // ********************************************************************** |
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| 148 | // ************************ SetEnergyRange ***************************** |
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| 149 | // ********************************************************************** |
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| 150 | void G4VRangeToEnergyConverter::SetEnergyRange(G4double lowedge, |
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| 151 | G4double highedge) |
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| 152 | { |
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| 153 | // check LowestEnergy/ HighestEnergy |
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| 154 | if ( (lowedge<0.0)||(highedge<=lowedge) ){ |
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| 155 | G4cerr << "Error in G4VRangeToEnergyConverter::SetEnergyRange"; |
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| 156 | G4cerr << " : illegal energy range" << "(" << lowedge/GeV; |
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| 157 | G4cerr << "," << highedge/GeV << ") [GeV]" << G4endl; |
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| 158 | } else { |
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| 159 | LowestEnergy = lowedge; |
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| 160 | HighestEnergy = highedge; |
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| 161 | } |
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| 162 | } |
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| 163 | |
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| 164 | |
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| 165 | G4double G4VRangeToEnergyConverter::GetLowEdgeEnergy() |
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| 166 | { |
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| 167 | return LowestEnergy; |
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| 168 | } |
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| 169 | |
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| 170 | |
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| 171 | G4double G4VRangeToEnergyConverter::GetHighEdgeEnergy() |
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| 172 | { |
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| 173 | return HighestEnergy; |
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| 174 | } |
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| 175 | |
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| 176 | // ********************************************************************** |
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| 177 | // ************************ RangeLinSimpson ***************************** |
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| 178 | // ********************************************************************** |
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| 179 | G4double G4VRangeToEnergyConverter::RangeLinSimpson( |
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| 180 | G4int numberOfElement, |
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| 181 | const G4ElementVector* elementVector, |
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| 182 | const G4double* atomicNumDensityVector, |
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| 183 | G4double aMass, |
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| 184 | G4double taulow, G4double tauhigh, G4int nbin) |
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| 185 | { |
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| 186 | // Simpson numerical integration, linear binning |
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| 187 | G4double dtau = (tauhigh-taulow)/nbin; |
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| 188 | G4double Value=0.; |
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| 189 | for (size_t i=0; i<=size_t(nbin); i++){ |
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| 190 | G4double taui=taulow+dtau*i; |
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| 191 | G4double ti=aMass*taui; |
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| 192 | G4double lossi=0.; |
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| 193 | size_t nEl = (size_t)(numberOfElement); |
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| 194 | for (size_t j=0; j<nEl; j++) { |
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| 195 | G4bool isOut; |
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| 196 | G4int IndEl = (*elementVector)[j]->GetIndex(); |
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| 197 | lossi += atomicNumDensityVector[j]* |
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| 198 | (*theLossTable)[IndEl]->GetValue(ti,isOut); |
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| 199 | } |
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| 200 | if ( i==0 ) { |
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| 201 | Value += 0.5/lossi; |
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| 202 | } else { |
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| 203 | if ( i<size_t(nbin) ) Value += 1./lossi; |
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| 204 | else Value += 0.5/lossi; |
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| 205 | } |
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| 206 | } |
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| 207 | Value *= aMass*dtau; |
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| 208 | |
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| 209 | return Value; |
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| 210 | } |
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| 211 | |
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| 212 | |
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| 213 | // ********************************************************************** |
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| 214 | // ************************ RangeLogSimpson ***************************** |
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| 215 | // ********************************************************************** |
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| 216 | G4double G4VRangeToEnergyConverter::RangeLogSimpson( |
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| 217 | G4int numberOfElement, |
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| 218 | const G4ElementVector* elementVector, |
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| 219 | const G4double* atomicNumDensityVector, |
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| 220 | G4double aMass, |
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| 221 | G4double ltaulow, G4double ltauhigh, |
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| 222 | G4int nbin) |
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| 223 | { |
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| 224 | // Simpson numerical integration, logarithmic binning |
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| 225 | if(nbin<0) nbin = TotBin; |
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| 226 | G4double ltt = ltauhigh-ltaulow; |
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| 227 | G4double dltau = ltt/nbin; |
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| 228 | G4double Value = 0.; |
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| 229 | for (size_t i=0; i<=size_t(nbin); i++){ |
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| 230 | G4double ui = ltaulow+dltau*i; |
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| 231 | G4double taui = std::exp(ui); |
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| 232 | G4double ti = aMass*taui; |
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| 233 | G4double lossi = 0.; |
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| 234 | size_t nEl = (size_t)(numberOfElement); |
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| 235 | |
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| 236 | for (size_t j=0; j<nEl; j++) { |
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| 237 | G4bool isOut; |
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| 238 | G4int IndEl = (*elementVector)[j]->GetIndex(); |
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| 239 | lossi += atomicNumDensityVector[j]* |
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| 240 | (*theLossTable)[IndEl]->GetValue(ti,isOut); |
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| 241 | } |
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| 242 | if ( i==0 ) { |
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| 243 | Value += 0.5*taui/lossi; |
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| 244 | } else { |
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| 245 | if ( i<size_t(nbin) ) Value += taui/lossi; |
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| 246 | else Value += 0.5*taui/lossi; |
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| 247 | } |
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| 248 | } |
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| 249 | Value *= aMass*dltau; |
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| 250 | |
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| 251 | return Value; |
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| 252 | } |
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| 253 | |
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| 254 | // ********************************************************************** |
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| 255 | // ************************ BuildLossTable ****************************** |
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| 256 | // ********************************************************************** |
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| 257 | // create Energy Loss Table for charged particles |
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| 258 | // (cross section tabel for neutral ) |
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| 259 | void G4VRangeToEnergyConverter::BuildLossTable() |
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| 260 | { |
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| 261 | // Build dE/dx tables for elements |
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| 262 | if (size_t(NumberOfElements) != G4Element::GetNumberOfElements()) { |
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| 263 | if (theLossTable!=0) { |
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| 264 | theLossTable->clearAndDestroy(); |
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| 265 | delete theLossTable; |
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| 266 | } |
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| 267 | theLossTable =0; |
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| 268 | NumberOfElements = 0; |
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| 269 | } |
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| 270 | |
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| 271 | if (NumberOfElements ==0) { |
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| 272 | NumberOfElements = G4Element::GetNumberOfElements(); |
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| 273 | theLossTable = new G4LossTable(); |
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| 274 | theLossTable->reserve(G4Element::GetNumberOfElements()); |
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| 275 | #ifdef G4VERBOSE |
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[961] | 276 | if (GetVerboseLevel()>3) { |
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[819] | 277 | G4cout << "G4VRangeToEnergyConverter::BuildLossTable() "; |
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| 278 | G4cout << "Create theLossTable[" << theLossTable << "]"; |
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| 279 | G4cout << " NumberOfElements=" << NumberOfElements <<G4endl; |
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| 280 | } |
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| 281 | #endif |
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| 282 | |
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| 283 | |
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| 284 | // fill the loss table |
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| 285 | for (size_t j=0; j<size_t(NumberOfElements); j++){ |
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| 286 | G4double Value; |
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| 287 | G4LossVector* aVector= new |
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| 288 | G4LossVector(LowestEnergy, HighestEnergy, TotBin); |
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| 289 | for (size_t i=0; i<size_t(TotBin); i++) { |
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| 290 | Value = ComputeLoss( (*G4Element::GetElementTable())[j]->GetZ(), |
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| 291 | aVector->GetLowEdgeEnergy(i) |
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| 292 | ); |
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| 293 | aVector->PutValue(i,Value); |
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| 294 | } |
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| 295 | theLossTable->insert(aVector); |
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| 296 | } |
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| 297 | } |
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| 298 | } |
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| 299 | |
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| 300 | // ********************************************************************** |
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| 301 | // ************************** ComputeLoss ******************************* |
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| 302 | // ********************************************************************** |
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| 303 | G4double G4VRangeToEnergyConverter::ComputeLoss(G4double AtomicNumber, |
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| 304 | G4double KineticEnergy) const |
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| 305 | { |
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| 306 | // calculate dE/dx |
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| 307 | |
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| 308 | static G4double Z; |
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| 309 | static G4double ionpot, tau0, taum, taul, ca, cba, cc; |
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| 310 | |
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| 311 | G4double z2Particle = theParticle->GetPDGCharge()/eplus; |
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| 312 | z2Particle *= z2Particle; |
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| 313 | if (z2Particle < 0.1) return 0.0; |
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| 314 | |
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[1055] | 315 | if( std::fabs(AtomicNumber-Z)>0.1 ){ |
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[819] | 316 | // recalculate constants |
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| 317 | Z = AtomicNumber; |
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| 318 | G4double Z13 = std::exp(std::log(Z)/3.); |
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| 319 | tau0 = 0.1*Z13*MeV/proton_mass_c2; |
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| 320 | taum = 0.035*Z13*MeV/proton_mass_c2; |
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| 321 | taul = 2.*MeV/proton_mass_c2; |
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| 322 | ionpot = 1.6e-5*MeV*std::exp(0.9*std::log(Z)); |
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| 323 | cc = (taul+1.)*(taul+1.)*std::log(2.*electron_mass_c2*taul*(taul+2.)/ionpot)/(taul*(taul+2.))-1.; |
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| 324 | cc = 2.*twopi_mc2_rcl2*Z*cc*std::sqrt(taul); |
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| 325 | ca = cc/((1.-0.5*std::sqrt(tau0/taum))*tau0); |
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| 326 | cba = -0.5/std::sqrt(taum); |
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| 327 | } |
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| 328 | |
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| 329 | G4double tau = KineticEnergy/theParticle->GetPDGMass(); |
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| 330 | G4double dEdx; |
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| 331 | if ( tau <= tau0 ) { |
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| 332 | dEdx = ca*(std::sqrt(tau)+cba*tau); |
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| 333 | } else { |
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| 334 | if( tau <= taul ) { |
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| 335 | dEdx = cc/std::sqrt(tau); |
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| 336 | } else { |
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| 337 | dEdx = (tau+1.)*(tau+1.)* |
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| 338 | std::log(2.*electron_mass_c2*tau*(tau+2.)/ionpot)/(tau*(tau+2.))-1.; |
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| 339 | dEdx = 2.*twopi_mc2_rcl2*Z*dEdx; |
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| 340 | } |
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| 341 | } |
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| 342 | return dEdx*z2Particle ; |
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| 343 | } |
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| 344 | |
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| 345 | // ********************************************************************** |
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| 346 | // ************************ BuildRangeVector **************************** |
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| 347 | // ********************************************************************** |
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| 348 | void G4VRangeToEnergyConverter::BuildRangeVector( |
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| 349 | const G4Material* aMaterial, |
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| 350 | G4double maxEnergy, |
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| 351 | G4double aMass, |
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| 352 | G4RangeVector* rangeVector) |
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| 353 | { |
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| 354 | // create range vector for a material |
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| 355 | const G4double tlim=2.*MeV, t1=0.1*MeV, t2=0.025*MeV; |
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| 356 | const G4int maxnbint=100; |
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| 357 | |
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| 358 | const G4ElementVector* elementVector = aMaterial->GetElementVector(); |
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| 359 | const G4double* atomicNumDensityVector = aMaterial->GetAtomicNumDensityVector(); |
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| 360 | |
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| 361 | G4int NumEl = aMaterial->GetNumberOfElements(); |
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| 362 | |
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| 363 | // calculate parameters of the low energy part first |
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| 364 | G4double loss1=0.; |
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| 365 | G4double loss2=0.; |
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| 366 | size_t i; |
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| 367 | for (i=0; i<size_t(NumEl); i++) { |
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| 368 | G4bool isOut; |
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| 369 | G4int IndEl = (*elementVector)[i]->GetIndex(); |
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| 370 | loss1 += atomicNumDensityVector[i]* |
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| 371 | (*theLossTable)[IndEl]->GetValue(t1,isOut); |
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| 372 | loss2 += atomicNumDensityVector[i]* |
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| 373 | (*theLossTable)[IndEl]->GetValue(t2,isOut); |
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| 374 | } |
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| 375 | G4double tau1 = t1/proton_mass_c2; |
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| 376 | G4double sqtau1 = std::sqrt(tau1); |
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| 377 | G4double ca = (4.*loss2-loss1)/sqtau1; |
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| 378 | G4double cb = (2.*loss1-4.*loss2)/tau1; |
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| 379 | G4double cba = cb/ca; |
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| 380 | G4double taulim = tlim/proton_mass_c2; |
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| 381 | G4double taumax = maxEnergy/aMass; |
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| 382 | G4double ltaumax = std::log(taumax); |
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| 383 | |
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| 384 | // now we can fill the range vector.... |
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| 385 | G4double rmax = 0.0; |
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| 386 | for (i=0; i<size_t(TotBin); i++) { |
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| 387 | G4double LowEdgeEnergy = rangeVector->GetLowEdgeEnergy(i); |
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| 388 | G4double tau = LowEdgeEnergy/aMass; |
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| 389 | G4double Value; |
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| 390 | |
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| 391 | if ( tau <= tau1 ){ |
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| 392 | Value =2.*aMass*std::log(1.+cba*std::sqrt(tau))/cb; |
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| 393 | } else { |
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| 394 | Value = 2.*aMass*std::log(1.+cba*sqtau1)/cb; |
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| 395 | if ( tau <= taulim ) { |
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| 396 | G4int nbin = (G4int)(maxnbint*(tau-tau1)/(taulim-tau1)); |
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| 397 | if ( nbin<1 ) nbin = 1; |
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| 398 | Value += RangeLinSimpson( NumEl, elementVector, |
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| 399 | atomicNumDensityVector, aMass, |
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| 400 | tau1, tau, nbin); |
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| 401 | } else { |
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| 402 | Value += RangeLinSimpson( NumEl, elementVector, |
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| 403 | atomicNumDensityVector, aMass, |
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| 404 | tau1, taulim, maxnbint); |
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| 405 | G4double ltaulow = std::log(taulim); |
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| 406 | G4double ltauhigh = std::log(tau); |
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| 407 | G4int nbin = (G4int)(maxnbint*(ltauhigh-ltaulow)/(ltaumax-ltaulow)); |
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| 408 | if ( nbin<1 ) nbin = 1; |
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| 409 | Value += RangeLogSimpson(NumEl, elementVector, |
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| 410 | atomicNumDensityVector, aMass, |
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| 411 | ltaulow, ltauhigh, nbin); |
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| 412 | } |
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| 413 | } |
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| 414 | rangeVector->PutValue(i,Value); |
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| 415 | if (rmax < Value) rmax = Value; |
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| 416 | } |
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| 417 | } |
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| 418 | |
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| 419 | // ********************************************************************** |
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| 420 | // ****************** ConvertCutToKineticEnergy ************************* |
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| 421 | // ********************************************************************** |
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| 422 | G4double G4VRangeToEnergyConverter::ConvertCutToKineticEnergy( |
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| 423 | G4RangeVector* rangeVector, |
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| 424 | G4double theCutInLength, |
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| 425 | size_t materialIndex |
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| 426 | ) const |
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| 427 | { |
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| 428 | const G4double epsilon=0.01; |
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| 429 | |
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| 430 | // find max. range and the corresponding energy (rmax,Tmax) |
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| 431 | G4double rmax= -1.e10*mm; |
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| 432 | G4double Tmax= HighestEnergy; |
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| 433 | G4double fac = std::exp( std::log(HighestEnergy/LowestEnergy)/TotBin ); |
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| 434 | G4double T=LowestEnergy/fac; |
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| 435 | G4bool isOut; |
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| 436 | |
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| 437 | for (size_t ibin=0; ibin<size_t(TotBin); ibin++) { |
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| 438 | T *= fac; |
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| 439 | G4double r=rangeVector->GetValue(T,isOut); |
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| 440 | if ( r>rmax ) { |
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| 441 | Tmax=T; |
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| 442 | rmax=r; |
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| 443 | } |
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| 444 | } |
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| 445 | |
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| 446 | // check cut in length is smaller than range max |
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| 447 | if ( theCutInLength >= rmax ) { |
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| 448 | #ifdef G4VERBOSE |
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[961] | 449 | if (GetVerboseLevel()>2) { |
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[819] | 450 | G4cout << "G4VRangeToEnergyConverter::ConvertCutToKineticEnergy "; |
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| 451 | G4cout << " for " << theParticle->GetParticleName() << G4endl; |
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| 452 | G4cout << "The cut in range [" << theCutInLength/mm << " (mm)] "; |
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| 453 | G4cout << " is too big " ; |
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| 454 | G4cout << " for material idx=" << materialIndex <<G4endl; |
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| 455 | G4cout << "The cut in energy is set" << DBL_MAX/GeV << "GeV " <<G4endl; |
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| 456 | } |
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| 457 | #endif |
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| 458 | return DBL_MAX; |
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| 459 | } |
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| 460 | |
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| 461 | // convert range to energy |
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| 462 | G4double T1 = LowestEnergy; |
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| 463 | G4double r1 = rangeVector->GetValue(T1,isOut); |
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| 464 | if ( theCutInLength <= r1 ) |
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| 465 | { |
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| 466 | return T1; |
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| 467 | } |
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| 468 | |
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| 469 | G4double T2 = Tmax ; |
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| 470 | G4double T3 = std::sqrt(T1*T2); |
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| 471 | G4double r3 = rangeVector->GetValue(T3,isOut); |
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[1055] | 472 | while ( std::fabs(1.-r3/theCutInLength)>epsilon ) { |
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[819] | 473 | if ( theCutInLength <= r3 ) { |
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| 474 | T2 = T3; |
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| 475 | } else { |
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| 476 | T1 = T3; |
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| 477 | } |
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| 478 | T3 = std::sqrt(T1*T2); |
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| 479 | r3 = rangeVector->GetValue(T3,isOut); |
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| 480 | } |
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| 481 | |
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| 482 | return T3; |
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| 483 | } |
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| 484 | |
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