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 | // File name: G4PAIPhotonModel.cc |
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27 | // |
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28 | // Author: Vladimir.Grichine@cern.ch based on G4PAIModel class |
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29 | // |
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30 | // Creation date: 20.05.2004 |
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31 | // |
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32 | // Modifications: |
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33 | // |
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34 | // 17.08.04 V.Grichine, bug fixed for Tkin<=0 in SampleSecondary |
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35 | // 16.08.04 V.Grichine, bug fixed in massRatio for DEDX, CrossSection, SampleSecondary |
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36 | // 11.04.05 Major optimisation of internal interfaces (V.Ivantchenko) |
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37 | // |
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38 | |
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39 | #include "G4Region.hh" |
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40 | #include "G4PhysicsLogVector.hh" |
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41 | #include "G4PhysicsFreeVector.hh" |
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42 | #include "G4PhysicsTable.hh" |
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43 | #include "G4ProductionCutsTable.hh" |
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44 | #include "G4MaterialCutsCouple.hh" |
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45 | #include "G4MaterialTable.hh" |
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46 | #include "G4SandiaTable.hh" |
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47 | #include "G4PAIxSection.hh" |
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48 | |
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49 | #include "G4PAIPhotonModel.hh" |
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50 | #include "Randomize.hh" |
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51 | #include "G4Electron.hh" |
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52 | #include "G4Positron.hh" |
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53 | #include "G4Gamma.hh" |
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54 | #include "G4Poisson.hh" |
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55 | #include "G4Step.hh" |
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56 | #include "G4Material.hh" |
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57 | #include "G4DynamicParticle.hh" |
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58 | #include "G4ParticleDefinition.hh" |
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59 | #include "G4ParticleChangeForLoss.hh" |
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60 | #include "G4GeometryTolerance.hh" |
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61 | |
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62 | //////////////////////////////////////////////////////////////////////// |
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63 | |
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64 | using namespace std; |
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65 | |
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66 | G4PAIPhotonModel::G4PAIPhotonModel(const G4ParticleDefinition* p, const G4String& nam) |
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67 | : G4VEmModel(nam),G4VEmFluctuationModel(nam), |
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68 | fLowestKineticEnergy(10.0*keV), |
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69 | fHighestKineticEnergy(100.*TeV), |
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70 | fTotBin(200), |
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71 | fMeanNumber(20), |
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72 | fParticle(0), |
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73 | fHighKinEnergy(100.*TeV), |
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74 | fLowKinEnergy(2.0*MeV), |
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75 | fTwoln10(2.0*log(10.0)), |
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76 | fBg2lim(0.0169), |
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77 | fTaulim(8.4146e-3) |
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78 | { |
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79 | if(p) SetParticle(p); |
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80 | |
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81 | fVerbose = 0; |
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82 | fElectron = G4Electron::Electron(); |
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83 | fPositron = G4Positron::Positron(); |
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84 | |
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85 | fProtonEnergyVector = new G4PhysicsLogVector(fLowestKineticEnergy, |
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86 | fHighestKineticEnergy, |
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87 | fTotBin); |
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88 | fPAItransferTable = 0; |
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89 | fPAIphotonTable = 0; |
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90 | fPAIplasmonTable = 0; |
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91 | |
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92 | fPAIdEdxTable = 0; |
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93 | fSandiaPhotoAbsCof = 0; |
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94 | fdEdxVector = 0; |
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95 | |
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96 | fLambdaVector = 0; |
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97 | fdNdxCutVector = 0; |
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98 | fdNdxCutPhotonVector = 0; |
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99 | fdNdxCutPlasmonVector = 0; |
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100 | |
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101 | isInitialised = false; |
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102 | } |
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103 | |
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104 | //////////////////////////////////////////////////////////////////////////// |
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105 | |
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106 | G4PAIPhotonModel::~G4PAIPhotonModel() |
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107 | { |
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108 | if(fProtonEnergyVector) delete fProtonEnergyVector; |
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109 | if(fdEdxVector) delete fdEdxVector ; |
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110 | if ( fLambdaVector) delete fLambdaVector; |
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111 | if ( fdNdxCutVector) delete fdNdxCutVector; |
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112 | |
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113 | if( fPAItransferTable ) |
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114 | { |
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115 | fPAItransferTable->clearAndDestroy(); |
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116 | delete fPAItransferTable ; |
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117 | } |
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118 | if( fPAIphotonTable ) |
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119 | { |
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120 | fPAIphotonTable->clearAndDestroy(); |
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121 | delete fPAIphotonTable ; |
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122 | } |
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123 | if( fPAIplasmonTable ) |
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124 | { |
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125 | fPAIplasmonTable->clearAndDestroy(); |
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126 | delete fPAIplasmonTable ; |
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127 | } |
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128 | if(fSandiaPhotoAbsCof) |
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129 | { |
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130 | for(G4int i=0;i<fSandiaIntervalNumber;i++) |
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131 | { |
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132 | delete[] fSandiaPhotoAbsCof[i]; |
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133 | } |
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134 | delete[] fSandiaPhotoAbsCof; |
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135 | } |
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136 | } |
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137 | |
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138 | /////////////////////////////////////////////////////////////////////////////// |
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139 | |
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140 | void G4PAIPhotonModel::SetParticle(const G4ParticleDefinition* p) |
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141 | { |
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142 | fParticle = p; |
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143 | fMass = fParticle->GetPDGMass(); |
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144 | fSpin = fParticle->GetPDGSpin(); |
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145 | G4double q = fParticle->GetPDGCharge()/eplus; |
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146 | fChargeSquare = q*q; |
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147 | fLowKinEnergy *= fMass/proton_mass_c2; |
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148 | fRatio = electron_mass_c2/fMass; |
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149 | fQc = fMass/fRatio; |
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150 | } |
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151 | |
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152 | //////////////////////////////////////////////////////////////////////////// |
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153 | |
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154 | void G4PAIPhotonModel::Initialise(const G4ParticleDefinition* p, |
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155 | const G4DataVector&) |
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156 | { |
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157 | if(isInitialised) return; |
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158 | isInitialised = true; |
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159 | |
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160 | if(!fParticle) SetParticle(p); |
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161 | |
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162 | if(pParticleChange) |
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163 | fParticleChange = reinterpret_cast<G4ParticleChangeForLoss*>(pParticleChange); |
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164 | else |
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165 | fParticleChange = new G4ParticleChangeForLoss(); |
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166 | |
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167 | const G4ProductionCutsTable* theCoupleTable = |
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168 | G4ProductionCutsTable::GetProductionCutsTable(); |
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169 | |
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170 | for(size_t iReg = 0; iReg < fPAIRegionVector.size();++iReg) // region loop |
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171 | { |
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172 | const G4Region* curReg = fPAIRegionVector[iReg]; |
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173 | |
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174 | vector<G4Material*>::const_iterator matIter = curReg->GetMaterialIterator(); |
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175 | size_t jMat; |
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176 | size_t numOfMat = curReg->GetNumberOfMaterials(); |
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177 | |
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178 | // for(size_t jMat = 0; jMat < curReg->GetNumberOfMaterials();++jMat){} |
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179 | const G4MaterialTable* theMaterialTable = G4Material::GetMaterialTable(); |
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180 | size_t numberOfMat = G4Material::GetNumberOfMaterials(); |
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181 | |
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182 | for(jMat = 0 ; jMat < numOfMat; ++jMat) // region material loop |
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183 | { |
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184 | const G4MaterialCutsCouple* matCouple = theCoupleTable-> |
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185 | GetMaterialCutsCouple( *matIter, curReg->GetProductionCuts() ); |
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186 | fMaterialCutsCoupleVector.push_back(matCouple); |
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187 | |
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188 | size_t iMatGlob; |
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189 | for(iMatGlob = 0 ; iMatGlob < numberOfMat ; iMatGlob++ ) |
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190 | { |
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191 | if( *matIter == (*theMaterialTable)[iMatGlob]) break ; |
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192 | } |
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193 | fMatIndex = iMatGlob; |
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194 | |
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195 | ComputeSandiaPhotoAbsCof(); |
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196 | BuildPAIonisationTable(); |
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197 | |
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198 | fPAIxscBank.push_back(fPAItransferTable); |
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199 | fPAIphotonBank.push_back(fPAIphotonTable); |
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200 | fPAIplasmonBank.push_back(fPAIplasmonTable); |
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201 | fPAIdEdxBank.push_back(fPAIdEdxTable); |
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202 | fdEdxTable.push_back(fdEdxVector); |
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203 | |
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204 | BuildLambdaVector(matCouple); |
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205 | |
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206 | fdNdxCutTable.push_back(fdNdxCutVector); |
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207 | fdNdxCutPhotonTable.push_back(fdNdxCutPhotonVector); |
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208 | fdNdxCutPlasmonTable.push_back(fdNdxCutPlasmonVector); |
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209 | fLambdaTable.push_back(fLambdaVector); |
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210 | |
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211 | |
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212 | matIter++; |
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213 | } |
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214 | } |
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215 | } |
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216 | |
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217 | ////////////////////////////////////////////////////////////////// |
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218 | |
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219 | void G4PAIPhotonModel::ComputeSandiaPhotoAbsCof() |
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220 | { |
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221 | G4int i, j, numberOfElements ; |
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222 | static const G4MaterialTable* theMaterialTable = G4Material::GetMaterialTable(); |
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223 | |
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224 | G4SandiaTable thisMaterialSandiaTable(fMatIndex) ; |
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225 | numberOfElements = (*theMaterialTable)[fMatIndex]-> |
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226 | GetNumberOfElements(); |
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227 | G4int* thisMaterialZ = new G4int[numberOfElements] ; |
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228 | |
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229 | for(i=0;i<numberOfElements;i++) |
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230 | { |
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231 | thisMaterialZ[i] = |
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232 | (G4int)(*theMaterialTable)[fMatIndex]->GetElement(i)->GetZ() ; |
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233 | } |
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234 | fSandiaIntervalNumber = thisMaterialSandiaTable.SandiaIntervals |
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235 | (thisMaterialZ,numberOfElements) ; |
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236 | |
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237 | fSandiaIntervalNumber = thisMaterialSandiaTable.SandiaMixing |
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238 | ( thisMaterialZ , |
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239 | (*theMaterialTable)[fMatIndex]->GetFractionVector() , |
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240 | numberOfElements,fSandiaIntervalNumber) ; |
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241 | |
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242 | fSandiaPhotoAbsCof = new G4double*[fSandiaIntervalNumber] ; |
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243 | |
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244 | for(i=0;i<fSandiaIntervalNumber;i++) fSandiaPhotoAbsCof[i] = new G4double[5] ; |
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245 | |
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246 | for( i = 0 ; i < fSandiaIntervalNumber ; i++ ) |
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247 | { |
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248 | fSandiaPhotoAbsCof[i][0] = thisMaterialSandiaTable.GetPhotoAbsorpCof(i+1,0) ; |
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249 | |
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250 | for( j = 1; j < 5 ; j++ ) |
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251 | { |
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252 | fSandiaPhotoAbsCof[i][j] = thisMaterialSandiaTable. |
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253 | GetPhotoAbsorpCof(i+1,j)* |
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254 | (*theMaterialTable)[fMatIndex]->GetDensity() ; |
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255 | } |
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256 | } |
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257 | // delete[] thisMaterialZ ; |
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258 | } |
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259 | |
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260 | //////////////////////////////////////////////////////////////////////////// |
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261 | // |
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262 | // Build tables for the ionization energy loss |
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263 | // the tables are built for MATERIALS |
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264 | // ********* |
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265 | |
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266 | void |
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267 | G4PAIPhotonModel::BuildPAIonisationTable() |
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268 | { |
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269 | G4double LowEdgeEnergy , ionloss ; |
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270 | G4double massRatio, tau, Tmax, Tmin, Tkin, deltaLow, gamma, bg2 ; |
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271 | /* |
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272 | if( fPAItransferTable ) |
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273 | { |
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274 | fPAItransferTable->clearAndDestroy() ; |
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275 | delete fPAItransferTable ; |
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276 | } |
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277 | */ |
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278 | fPAItransferTable = new G4PhysicsTable(fTotBin); |
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279 | /* |
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280 | if( fPAIratioTable ) |
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281 | { |
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282 | fPAIratioTable->clearAndDestroy() ; |
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283 | delete fPAIratioTable ; |
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284 | } |
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285 | */ |
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286 | fPAIphotonTable = new G4PhysicsTable(fTotBin); |
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287 | fPAIplasmonTable = new G4PhysicsTable(fTotBin); |
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288 | /* |
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289 | if( fPAIdEdxTable ) |
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290 | { |
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291 | fPAIdEdxTable->clearAndDestroy() ; |
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292 | delete fPAIdEdxTable ; |
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293 | } |
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294 | */ |
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295 | fPAIdEdxTable = new G4PhysicsTable(fTotBin); |
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296 | |
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297 | // if(fdEdxVector) delete fdEdxVector ; |
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298 | fdEdxVector = new G4PhysicsLogVector( fLowestKineticEnergy, |
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299 | fHighestKineticEnergy, |
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300 | fTotBin ) ; |
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301 | Tmin = fSandiaPhotoAbsCof[0][0] ; // low energy Sandia interval |
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302 | deltaLow = 100.*eV; // 0.5*eV ; |
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303 | |
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304 | for (G4int i = 0 ; i < fTotBin ; i++) //The loop for the kinetic energy |
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305 | { |
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306 | LowEdgeEnergy = fProtonEnergyVector->GetLowEdgeEnergy(i) ; |
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307 | tau = LowEdgeEnergy/proton_mass_c2 ; |
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308 | // if(tau < 0.01) tau = 0.01 ; |
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309 | gamma = tau +1. ; |
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310 | // G4cout<<"gamma = "<<gamma<<endl ; |
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311 | bg2 = tau*(tau + 2. ) ; |
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312 | massRatio = electron_mass_c2/proton_mass_c2 ; |
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313 | Tmax = MaxSecondaryEnergy(fParticle, LowEdgeEnergy); |
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314 | // G4cout<<"proton Tkin = "<<LowEdgeEnergy/MeV<<" MeV" |
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315 | // <<" Tmax = "<<Tmax/MeV<<" MeV"<<G4endl; |
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316 | // Tkin = DeltaCutInKineticEnergyNow ; |
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317 | |
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318 | // if ( DeltaCutInKineticEnergyNow > Tmax) // was < |
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319 | Tkin = Tmax ; |
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320 | if ( Tkin < Tmin + deltaLow ) // low energy safety |
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321 | { |
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322 | Tkin = Tmin + deltaLow ; |
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323 | } |
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324 | G4PAIxSection protonPAI( fMatIndex, |
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325 | Tkin, |
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326 | bg2, |
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327 | fSandiaPhotoAbsCof, |
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328 | fSandiaIntervalNumber ) ; |
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329 | |
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330 | |
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331 | // G4cout<<"ionloss = "<<ionloss*cm/keV<<" keV/cm"<<endl ; |
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332 | // G4cout<<"n1 = "<<protonPAI.GetIntegralPAIxSection(1)*cm<<" 1/cm"<<endl ; |
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333 | // G4cout<<"protonPAI.GetSplineSize() = "<< |
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334 | // protonPAI.GetSplineSize()<<G4endl<<G4endl ; |
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335 | |
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336 | G4PhysicsFreeVector* transferVector = new |
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337 | G4PhysicsFreeVector(protonPAI.GetSplineSize()) ; |
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338 | G4PhysicsFreeVector* photonVector = new |
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339 | G4PhysicsFreeVector(protonPAI.GetSplineSize()) ; |
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340 | G4PhysicsFreeVector* plasmonVector = new |
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341 | G4PhysicsFreeVector(protonPAI.GetSplineSize()) ; |
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342 | G4PhysicsFreeVector* dEdxVector = new |
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343 | G4PhysicsFreeVector(protonPAI.GetSplineSize()) ; |
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344 | |
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345 | for( G4int k = 0 ; k < protonPAI.GetSplineSize() ; k++ ) |
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346 | { |
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347 | transferVector->PutValue( k , |
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348 | protonPAI.GetSplineEnergy(k+1), |
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349 | protonPAI.GetIntegralPAIxSection(k+1) ) ; |
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350 | photonVector->PutValue( k , |
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351 | protonPAI.GetSplineEnergy(k+1), |
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352 | protonPAI.GetIntegralCerenkov(k+1) ) ; |
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353 | plasmonVector->PutValue( k , |
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354 | protonPAI.GetSplineEnergy(k+1), |
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355 | protonPAI.GetIntegralPlasmon(k+1) ) ; |
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356 | dEdxVector->PutValue( k , |
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357 | protonPAI.GetSplineEnergy(k+1), |
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358 | protonPAI.GetIntegralPAIdEdx(k+1) ) ; |
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359 | } |
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360 | ionloss = protonPAI.GetMeanEnergyLoss() ; // total <dE/dx> |
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361 | if ( ionloss <= 0.) ionloss = DBL_MIN ; |
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362 | fdEdxVector->PutValue(i,ionloss) ; |
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363 | |
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364 | fPAItransferTable->insertAt(i,transferVector) ; |
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365 | fPAIphotonTable->insertAt(i,photonVector) ; |
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366 | fPAIplasmonTable->insertAt(i,plasmonVector) ; |
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367 | fPAIdEdxTable->insertAt(i,dEdxVector) ; |
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368 | |
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369 | } // end of Tkin loop |
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370 | // theLossTable->insert(fdEdxVector); |
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371 | // end of material loop |
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372 | // G4cout<<"G4PAIonisation::BuildPAIonisationTable() have been called"<<G4endl ; |
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373 | // G4cout<<"G4PAIonisation::BuildLossTable() have been called"<<G4endl ; |
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374 | } |
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375 | |
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376 | /////////////////////////////////////////////////////////////////////// |
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377 | // |
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378 | // Build mean free path tables for the delta ray production process |
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379 | // tables are built for MATERIALS |
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380 | // |
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381 | |
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382 | void |
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383 | G4PAIPhotonModel::BuildLambdaVector(const G4MaterialCutsCouple* matCutsCouple) |
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384 | { |
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385 | G4int i ; |
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386 | G4double dNdxCut,dNdxPhotonCut,dNdxPlasmonCut, lambda; |
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387 | G4double kCarTolerance = G4GeometryTolerance::GetInstance() |
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388 | ->GetSurfaceTolerance(); |
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389 | |
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390 | const G4ProductionCutsTable* theCoupleTable= |
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391 | G4ProductionCutsTable::GetProductionCutsTable(); |
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392 | |
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393 | size_t numOfCouples = theCoupleTable->GetTableSize(); |
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394 | size_t jMatCC; |
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395 | |
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396 | for (jMatCC = 0 ; jMatCC < numOfCouples ; jMatCC++ ) |
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397 | { |
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398 | if( matCutsCouple == theCoupleTable->GetMaterialCutsCouple(jMatCC) ) break; |
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399 | } |
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400 | if( jMatCC == numOfCouples && jMatCC > 0 ) jMatCC--; |
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401 | |
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402 | const vector<G4double>* deltaCutInKineticEnergy = theCoupleTable-> |
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403 | GetEnergyCutsVector(idxG4ElectronCut); |
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404 | const vector<G4double>* photonCutInKineticEnergy = theCoupleTable-> |
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405 | GetEnergyCutsVector(idxG4GammaCut); |
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406 | |
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407 | if (fLambdaVector) delete fLambdaVector; |
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408 | if (fdNdxCutVector) delete fdNdxCutVector; |
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409 | if (fdNdxCutPhotonVector) delete fdNdxCutPhotonVector; |
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410 | if (fdNdxCutPlasmonVector) delete fdNdxCutPlasmonVector; |
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411 | |
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412 | fLambdaVector = new G4PhysicsLogVector( fLowestKineticEnergy, |
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413 | fHighestKineticEnergy, |
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414 | fTotBin ); |
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415 | fdNdxCutVector = new G4PhysicsLogVector( fLowestKineticEnergy, |
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416 | fHighestKineticEnergy, |
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417 | fTotBin ); |
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418 | fdNdxCutPhotonVector = new G4PhysicsLogVector( fLowestKineticEnergy, |
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419 | fHighestKineticEnergy, |
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420 | fTotBin ); |
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421 | fdNdxCutPlasmonVector = new G4PhysicsLogVector( fLowestKineticEnergy, |
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422 | fHighestKineticEnergy, |
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423 | fTotBin ); |
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424 | |
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425 | G4double deltaCutInKineticEnergyNow = (*deltaCutInKineticEnergy)[jMatCC]; |
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426 | G4double photonCutInKineticEnergyNow = (*photonCutInKineticEnergy)[jMatCC]; |
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427 | |
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428 | if(fVerbose > 0) |
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429 | { |
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430 | G4cout<<"PAIPhotonModel deltaCutInKineticEnergyNow = " |
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431 | <<deltaCutInKineticEnergyNow/keV<<" keV"<<G4endl; |
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432 | G4cout<<"PAIPhotonModel photonCutInKineticEnergyNow = " |
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433 | <<photonCutInKineticEnergyNow/keV<<" keV"<<G4endl; |
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434 | } |
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435 | for ( i = 0 ; i < fTotBin ; i++ ) |
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436 | { |
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437 | dNdxPhotonCut = GetdNdxPhotonCut(i,photonCutInKineticEnergyNow); |
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438 | dNdxPlasmonCut = GetdNdxPlasmonCut(i,deltaCutInKineticEnergyNow); |
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439 | |
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440 | dNdxCut = dNdxPhotonCut + dNdxPlasmonCut; |
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441 | lambda = dNdxCut <= DBL_MIN ? DBL_MAX: 1.0/dNdxCut; |
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442 | |
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443 | if (lambda <= 1000*kCarTolerance) lambda = 1000*kCarTolerance; // Mmm ??? |
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444 | |
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445 | fLambdaVector->PutValue(i, lambda); |
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446 | |
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447 | fdNdxCutVector->PutValue(i, dNdxCut); |
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448 | fdNdxCutPhotonVector->PutValue(i, dNdxPhotonCut); |
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449 | fdNdxCutPlasmonVector->PutValue(i, dNdxPlasmonCut); |
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450 | } |
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451 | } |
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452 | |
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453 | /////////////////////////////////////////////////////////////////////// |
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454 | // |
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455 | // Returns integral PAI cross section for energy transfers >= transferCut |
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456 | |
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457 | G4double |
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458 | G4PAIPhotonModel::GetdNdxCut( G4int iPlace, G4double transferCut) |
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459 | { |
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460 | G4int iTransfer; |
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461 | G4double x1, x2, y1, y2, dNdxCut; |
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462 | // G4cout<<"iPlace = "<<iPlace<<"; "<<"transferCut = "<<transferCut<<G4endl; |
---|
463 | // G4cout<<"size = "<<G4int((*fPAItransferTable)(iPlace)->GetVectorLength()) |
---|
464 | // <<G4endl; |
---|
465 | for( iTransfer = 0 ; |
---|
466 | iTransfer < G4int((*fPAItransferTable)(iPlace)->GetVectorLength()) ; |
---|
467 | iTransfer++) |
---|
468 | { |
---|
469 | if(transferCut <= (*fPAItransferTable)(iPlace)->GetLowEdgeEnergy(iTransfer)) |
---|
470 | { |
---|
471 | break ; |
---|
472 | } |
---|
473 | } |
---|
474 | if ( iTransfer >= G4int((*fPAItransferTable)(iPlace)->GetVectorLength()) ) |
---|
475 | { |
---|
476 | iTransfer = (*fPAItransferTable)(iPlace)->GetVectorLength() - 1 ; |
---|
477 | } |
---|
478 | y1 = (*(*fPAItransferTable)(iPlace))(iTransfer-1) ; |
---|
479 | y2 = (*(*fPAItransferTable)(iPlace))(iTransfer) ; |
---|
480 | // G4cout<<"y1 = "<<y1<<"; "<<"y2 = "<<y2<<G4endl; |
---|
481 | x1 = (*fPAItransferTable)(iPlace)->GetLowEdgeEnergy(iTransfer-1) ; |
---|
482 | x2 = (*fPAItransferTable)(iPlace)->GetLowEdgeEnergy(iTransfer) ; |
---|
483 | // G4cout<<"x1 = "<<x1<<"; "<<"x2 = "<<x2<<G4endl; |
---|
484 | |
---|
485 | if ( y1 == y2 ) dNdxCut = y2 ; |
---|
486 | else |
---|
487 | { |
---|
488 | // if ( x1 == x2 ) dNdxCut = y1 + (y2 - y1)*G4UniformRand() ; |
---|
489 | if ( std::abs(x1-x2) <= eV ) dNdxCut = y1 + (y2 - y1)*G4UniformRand() ; |
---|
490 | else dNdxCut = y1 + (transferCut - x1)*(y2 - y1)/(x2 - x1) ; |
---|
491 | } |
---|
492 | // G4cout<<""<<dNdxCut<<G4endl; |
---|
493 | return dNdxCut ; |
---|
494 | } |
---|
495 | |
---|
496 | /////////////////////////////////////////////////////////////////////// |
---|
497 | // |
---|
498 | // Returns integral PAI cherenkovcross section for energy transfers >= transferCut |
---|
499 | |
---|
500 | G4double |
---|
501 | G4PAIPhotonModel::GetdNdxPhotonCut( G4int iPlace, G4double transferCut) |
---|
502 | { |
---|
503 | G4int iTransfer; |
---|
504 | G4double x1, x2, y1, y2, dNdxCut; |
---|
505 | // G4cout<<"iPlace = "<<iPlace<<"; "<<"transferCut = "<<transferCut<<G4endl; |
---|
506 | // G4cout<<"size = "<<G4int((*fPAIphotonTable)(iPlace)->GetVectorLength()) |
---|
507 | // <<G4endl; |
---|
508 | for( iTransfer = 0 ; |
---|
509 | iTransfer < G4int((*fPAIphotonTable)(iPlace)->GetVectorLength()) ; |
---|
510 | iTransfer++) |
---|
511 | { |
---|
512 | if(transferCut <= (*fPAIphotonTable)(iPlace)->GetLowEdgeEnergy(iTransfer)) |
---|
513 | { |
---|
514 | break ; |
---|
515 | } |
---|
516 | } |
---|
517 | if ( iTransfer >= G4int((*fPAIphotonTable)(iPlace)->GetVectorLength()) ) |
---|
518 | { |
---|
519 | iTransfer = (*fPAIphotonTable)(iPlace)->GetVectorLength() - 1 ; |
---|
520 | } |
---|
521 | y1 = (*(*fPAIphotonTable)(iPlace))(iTransfer-1) ; |
---|
522 | y2 = (*(*fPAIphotonTable)(iPlace))(iTransfer) ; |
---|
523 | // G4cout<<"y1 = "<<y1<<"; "<<"y2 = "<<y2<<G4endl; |
---|
524 | x1 = (*fPAIphotonTable)(iPlace)->GetLowEdgeEnergy(iTransfer-1) ; |
---|
525 | x2 = (*fPAIphotonTable)(iPlace)->GetLowEdgeEnergy(iTransfer) ; |
---|
526 | // G4cout<<"x1 = "<<x1<<"; "<<"x2 = "<<x2<<G4endl; |
---|
527 | |
---|
528 | if ( y1 == y2 ) dNdxCut = y2 ; |
---|
529 | else |
---|
530 | { |
---|
531 | // if ( x1 == x2 ) dNdxCut = y1 + (y2 - y1)*G4UniformRand() ; |
---|
532 | if ( std::abs(x1-x2) <= eV ) dNdxCut = y1 + (y2 - y1)*G4UniformRand() ; |
---|
533 | else dNdxCut = y1 + (transferCut - x1)*(y2 - y1)/(x2 - x1) ; |
---|
534 | } |
---|
535 | // G4cout<<""<<dNdxPhotonCut<<G4endl; |
---|
536 | return dNdxCut ; |
---|
537 | } |
---|
538 | |
---|
539 | /////////////////////////////////////////////////////////////////////// |
---|
540 | // |
---|
541 | // Returns integral PAI cross section for energy transfers >= transferCut |
---|
542 | |
---|
543 | G4double |
---|
544 | G4PAIPhotonModel::GetdNdxPlasmonCut( G4int iPlace, G4double transferCut) |
---|
545 | { |
---|
546 | G4int iTransfer; |
---|
547 | G4double x1, x2, y1, y2, dNdxCut; |
---|
548 | |
---|
549 | // G4cout<<"iPlace = "<<iPlace<<"; "<<"transferCut = "<<transferCut<<G4endl; |
---|
550 | // G4cout<<"size = "<<G4int((*fPAIPlasmonTable)(iPlace)->GetVectorLength()) |
---|
551 | // <<G4endl; |
---|
552 | for( iTransfer = 0 ; |
---|
553 | iTransfer < G4int((*fPAIplasmonTable)(iPlace)->GetVectorLength()) ; |
---|
554 | iTransfer++) |
---|
555 | { |
---|
556 | if(transferCut <= (*fPAIplasmonTable)(iPlace)->GetLowEdgeEnergy(iTransfer)) |
---|
557 | { |
---|
558 | break ; |
---|
559 | } |
---|
560 | } |
---|
561 | if ( iTransfer >= G4int((*fPAIplasmonTable)(iPlace)->GetVectorLength()) ) |
---|
562 | { |
---|
563 | iTransfer = (*fPAIplasmonTable)(iPlace)->GetVectorLength() - 1 ; |
---|
564 | } |
---|
565 | y1 = (*(*fPAIplasmonTable)(iPlace))(iTransfer-1) ; |
---|
566 | y2 = (*(*fPAIplasmonTable)(iPlace))(iTransfer) ; |
---|
567 | // G4cout<<"y1 = "<<y1<<"; "<<"y2 = "<<y2<<G4endl; |
---|
568 | x1 = (*fPAIplasmonTable)(iPlace)->GetLowEdgeEnergy(iTransfer-1) ; |
---|
569 | x2 = (*fPAIplasmonTable)(iPlace)->GetLowEdgeEnergy(iTransfer) ; |
---|
570 | // G4cout<<"x1 = "<<x1<<"; "<<"x2 = "<<x2<<G4endl; |
---|
571 | |
---|
572 | if ( y1 == y2 ) dNdxCut = y2 ; |
---|
573 | else |
---|
574 | { |
---|
575 | // if ( x1 == x2 ) dNdxCut = y1 + (y2 - y1)*G4UniformRand() ; |
---|
576 | if ( std::abs(x1-x2) <= eV ) dNdxCut = y1 + (y2 - y1)*G4UniformRand() ; |
---|
577 | else dNdxCut = y1 + (transferCut - x1)*(y2 - y1)/(x2 - x1) ; |
---|
578 | } |
---|
579 | // G4cout<<""<<dNdxPlasmonCut<<G4endl; |
---|
580 | return dNdxCut ; |
---|
581 | } |
---|
582 | |
---|
583 | /////////////////////////////////////////////////////////////////////// |
---|
584 | // |
---|
585 | // Returns integral dEdx for energy transfers >= transferCut |
---|
586 | |
---|
587 | G4double |
---|
588 | G4PAIPhotonModel::GetdEdxCut( G4int iPlace, G4double transferCut) |
---|
589 | { |
---|
590 | G4int iTransfer; |
---|
591 | G4double x1, x2, y1, y2, dEdxCut; |
---|
592 | // G4cout<<"iPlace = "<<iPlace<<"; "<<"transferCut = "<<transferCut<<G4endl; |
---|
593 | // G4cout<<"size = "<<G4int((*fPAIdEdxTable)(iPlace)->GetVectorLength()) |
---|
594 | // <<G4endl; |
---|
595 | for( iTransfer = 0 ; |
---|
596 | iTransfer < G4int((*fPAIdEdxTable)(iPlace)->GetVectorLength()) ; |
---|
597 | iTransfer++) |
---|
598 | { |
---|
599 | if(transferCut <= (*fPAIdEdxTable)(iPlace)->GetLowEdgeEnergy(iTransfer)) |
---|
600 | { |
---|
601 | break ; |
---|
602 | } |
---|
603 | } |
---|
604 | if ( iTransfer >= G4int((*fPAIdEdxTable)(iPlace)->GetVectorLength()) ) |
---|
605 | { |
---|
606 | iTransfer = (*fPAIdEdxTable)(iPlace)->GetVectorLength() - 1 ; |
---|
607 | } |
---|
608 | y1 = (*(*fPAIdEdxTable)(iPlace))(iTransfer-1) ; |
---|
609 | y2 = (*(*fPAIdEdxTable)(iPlace))(iTransfer) ; |
---|
610 | // G4cout<<"y1 = "<<y1<<"; "<<"y2 = "<<y2<<G4endl; |
---|
611 | x1 = (*fPAIdEdxTable)(iPlace)->GetLowEdgeEnergy(iTransfer-1) ; |
---|
612 | x2 = (*fPAIdEdxTable)(iPlace)->GetLowEdgeEnergy(iTransfer) ; |
---|
613 | // G4cout<<"x1 = "<<x1<<"; "<<"x2 = "<<x2<<G4endl; |
---|
614 | |
---|
615 | if ( y1 == y2 ) dEdxCut = y2 ; |
---|
616 | else |
---|
617 | { |
---|
618 | // if ( x1 == x2 ) dEdxCut = y1 + (y2 - y1)*G4UniformRand() ; |
---|
619 | if ( std::abs(x1-x2) <= eV ) dEdxCut = y1 + (y2 - y1)*G4UniformRand() ; |
---|
620 | else dEdxCut = y1 + (transferCut - x1)*(y2 - y1)/(x2 - x1) ; |
---|
621 | } |
---|
622 | // G4cout<<""<<dEdxCut<<G4endl; |
---|
623 | return dEdxCut ; |
---|
624 | } |
---|
625 | |
---|
626 | ////////////////////////////////////////////////////////////////////////////// |
---|
627 | |
---|
628 | G4double G4PAIPhotonModel::ComputeDEDX(const G4MaterialCutsCouple* matCC, |
---|
629 | const G4ParticleDefinition* p, |
---|
630 | G4double kineticEnergy, |
---|
631 | G4double cutEnergy) |
---|
632 | { |
---|
633 | G4int iTkin,iPlace; |
---|
634 | size_t jMat; |
---|
635 | G4double particleMass = p->GetPDGMass(); |
---|
636 | G4double scaledTkin = kineticEnergy*proton_mass_c2/particleMass; |
---|
637 | G4double charge = p->GetPDGCharge()/eplus; |
---|
638 | G4double charge2 = charge*charge; |
---|
639 | G4double dEdx = 0.; |
---|
640 | |
---|
641 | for( jMat = 0 ;jMat < fMaterialCutsCoupleVector.size() ; ++jMat ) |
---|
642 | { |
---|
643 | if( matCC == fMaterialCutsCoupleVector[jMat] ) break; |
---|
644 | } |
---|
645 | if(jMat == fMaterialCutsCoupleVector.size() && jMat > 0) jMat--; |
---|
646 | |
---|
647 | fPAIdEdxTable = fPAIdEdxBank[jMat]; |
---|
648 | fdEdxVector = fdEdxTable[jMat]; |
---|
649 | for(iTkin = 0 ; iTkin < fTotBin ; iTkin++) |
---|
650 | { |
---|
651 | if(scaledTkin < fProtonEnergyVector->GetLowEdgeEnergy(iTkin)) break ; |
---|
652 | } |
---|
653 | iPlace = iTkin - 1; |
---|
654 | if(iPlace < 0) iPlace = 0; |
---|
655 | dEdx = charge2*( (*fdEdxVector)(iPlace) - GetdEdxCut(iPlace,cutEnergy) ) ; |
---|
656 | |
---|
657 | if( dEdx < 0.) dEdx = 0.; |
---|
658 | return dEdx; |
---|
659 | } |
---|
660 | |
---|
661 | ///////////////////////////////////////////////////////////////////////// |
---|
662 | |
---|
663 | G4double G4PAIPhotonModel::CrossSection( const G4MaterialCutsCouple* matCC, |
---|
664 | const G4ParticleDefinition* p, |
---|
665 | G4double kineticEnergy, |
---|
666 | G4double cutEnergy, |
---|
667 | G4double maxEnergy ) |
---|
668 | { |
---|
669 | G4int iTkin,iPlace; |
---|
670 | size_t jMat, jMatCC; |
---|
671 | G4double tmax = min(MaxSecondaryEnergy(p, kineticEnergy), maxEnergy); |
---|
672 | G4double particleMass = p->GetPDGMass(); |
---|
673 | G4double scaledTkin = kineticEnergy*proton_mass_c2/particleMass; |
---|
674 | G4double charge = p->GetPDGCharge(); |
---|
675 | G4double charge2 = charge*charge, cross, cross1, cross2; |
---|
676 | G4double photon1, photon2, plasmon1, plasmon2; |
---|
677 | |
---|
678 | const G4ProductionCutsTable* theCoupleTable= |
---|
679 | G4ProductionCutsTable::GetProductionCutsTable(); |
---|
680 | |
---|
681 | size_t numOfCouples = theCoupleTable->GetTableSize(); |
---|
682 | |
---|
683 | for (jMatCC = 0 ; jMatCC < numOfCouples ; jMatCC++ ) |
---|
684 | { |
---|
685 | if( matCC == theCoupleTable->GetMaterialCutsCouple(jMatCC) ) break; |
---|
686 | } |
---|
687 | if( jMatCC == numOfCouples && jMatCC > 0 ) jMatCC--; |
---|
688 | |
---|
689 | const vector<G4double>* photonCutInKineticEnergy = theCoupleTable-> |
---|
690 | GetEnergyCutsVector(idxG4GammaCut); |
---|
691 | |
---|
692 | G4double photonCut = (*photonCutInKineticEnergy)[jMatCC] ; |
---|
693 | |
---|
694 | for( jMat = 0 ;jMat < fMaterialCutsCoupleVector.size() ; ++jMat ) |
---|
695 | { |
---|
696 | if( matCC == fMaterialCutsCoupleVector[jMat] ) break; |
---|
697 | } |
---|
698 | if(jMat == fMaterialCutsCoupleVector.size() && jMat > 0) jMat--; |
---|
699 | |
---|
700 | fPAItransferTable = fPAIxscBank[jMat]; |
---|
701 | fPAIphotonTable = fPAIphotonBank[jMat]; |
---|
702 | fPAIplasmonTable = fPAIplasmonBank[jMat]; |
---|
703 | |
---|
704 | for(iTkin = 0 ; iTkin < fTotBin ; iTkin++) |
---|
705 | { |
---|
706 | if(scaledTkin < fProtonEnergyVector->GetLowEdgeEnergy(iTkin)) break ; |
---|
707 | } |
---|
708 | iPlace = iTkin - 1; |
---|
709 | if(iPlace < 0) iPlace = 0; |
---|
710 | |
---|
711 | // G4cout<<"iPlace = "<<iPlace<<"; tmax = " |
---|
712 | // <<tmax<<"; cutEnergy = "<<cutEnergy<<G4endl; |
---|
713 | photon1 = GetdNdxPhotonCut(iPlace,tmax); |
---|
714 | photon2 = GetdNdxPhotonCut(iPlace,photonCut); |
---|
715 | |
---|
716 | plasmon1 = GetdNdxPlasmonCut(iPlace,tmax); |
---|
717 | plasmon2 = GetdNdxPlasmonCut(iPlace,cutEnergy); |
---|
718 | |
---|
719 | cross1 = photon1 + plasmon1; |
---|
720 | // G4cout<<"cross1 = "<<cross1<<G4endl; |
---|
721 | cross2 = photon2 + plasmon2; |
---|
722 | // G4cout<<"cross2 = "<<cross2<<G4endl; |
---|
723 | cross = (cross2 - cross1)*charge2; |
---|
724 | // G4cout<<"cross = "<<cross<<G4endl; |
---|
725 | |
---|
726 | if( cross < 0. ) cross = 0.; |
---|
727 | return cross; |
---|
728 | } |
---|
729 | |
---|
730 | /////////////////////////////////////////////////////////////////////////// |
---|
731 | // |
---|
732 | // It is analog of PostStepDoIt in terms of secondary electron or photon to |
---|
733 | // be returned as G4Dynamicparticle*. |
---|
734 | // |
---|
735 | |
---|
736 | void G4PAIPhotonModel::SampleSecondaries(std::vector<G4DynamicParticle*>* vdp, |
---|
737 | const G4MaterialCutsCouple* matCC, |
---|
738 | const G4DynamicParticle* dp, |
---|
739 | G4double tmin, |
---|
740 | G4double maxEnergy) |
---|
741 | { |
---|
742 | size_t jMat; |
---|
743 | for( jMat = 0 ;jMat < fMaterialCutsCoupleVector.size() ; ++jMat ) |
---|
744 | { |
---|
745 | if( matCC == fMaterialCutsCoupleVector[jMat] ) break; |
---|
746 | } |
---|
747 | if( jMat == fMaterialCutsCoupleVector.size() && jMat > 0 ) jMat--; |
---|
748 | |
---|
749 | fPAItransferTable = fPAIxscBank[jMat]; |
---|
750 | fPAIphotonTable = fPAIphotonBank[jMat]; |
---|
751 | fPAIplasmonTable = fPAIplasmonBank[jMat]; |
---|
752 | |
---|
753 | fdNdxCutVector = fdNdxCutTable[jMat]; |
---|
754 | fdNdxCutPhotonVector = fdNdxCutPhotonTable[jMat]; |
---|
755 | fdNdxCutPlasmonVector = fdNdxCutPlasmonTable[jMat]; |
---|
756 | |
---|
757 | G4double tmax = min(MaxSecondaryKinEnergy(dp), maxEnergy); |
---|
758 | if( tmin >= tmax && fVerbose > 0) |
---|
759 | { |
---|
760 | G4cout<<"G4PAIPhotonModel::SampleSecondary: tmin >= tmax "<<G4endl; |
---|
761 | } |
---|
762 | |
---|
763 | G4ThreeVector direction = dp->GetMomentumDirection(); |
---|
764 | G4double particleMass = dp->GetMass(); |
---|
765 | G4double kineticEnergy = dp->GetKineticEnergy(); |
---|
766 | G4double scaledTkin = kineticEnergy*fMass/particleMass; |
---|
767 | G4double totalEnergy = kineticEnergy + particleMass; |
---|
768 | G4double pSquare = kineticEnergy*(totalEnergy+particleMass); |
---|
769 | |
---|
770 | G4int iTkin; |
---|
771 | for(iTkin=0;iTkin<fTotBin;iTkin++) |
---|
772 | { |
---|
773 | if(scaledTkin < fProtonEnergyVector->GetLowEdgeEnergy(iTkin)) break ; |
---|
774 | } |
---|
775 | G4int iPlace = iTkin - 1 ; |
---|
776 | if(iPlace < 0) iPlace = 0; |
---|
777 | |
---|
778 | G4double dNdxPhotonCut = (*fdNdxCutPhotonVector)(iPlace) ; |
---|
779 | G4double dNdxPlasmonCut = (*fdNdxCutPlasmonVector)(iPlace) ; |
---|
780 | G4double dNdxCut = dNdxPhotonCut + dNdxPlasmonCut; |
---|
781 | |
---|
782 | G4double ratio; |
---|
783 | if (dNdxCut > 0.) ratio = dNdxPhotonCut/dNdxCut; |
---|
784 | else ratio = 0.; |
---|
785 | |
---|
786 | if(ratio < G4UniformRand() ) // secondary e- |
---|
787 | { |
---|
788 | G4double deltaTkin = GetPostStepTransfer(fPAIplasmonTable, fdNdxCutPlasmonVector, |
---|
789 | iPlace, scaledTkin); |
---|
790 | |
---|
791 | // G4cout<<"PAIPhotonModel PlasmonPostStepTransfer = "<<deltaTkin/keV<<" keV"<<G4endl ; |
---|
792 | |
---|
793 | if( deltaTkin <= 0. ) |
---|
794 | { |
---|
795 | G4cout<<"G4PAIPhotonModel::SampleSecondary e- deltaTkin = "<<deltaTkin<<G4endl; |
---|
796 | } |
---|
797 | if( deltaTkin <= 0.) return; |
---|
798 | |
---|
799 | G4double deltaTotalMomentum = sqrt(deltaTkin*(deltaTkin + 2. * electron_mass_c2 )); |
---|
800 | G4double totalMomentum = sqrt(pSquare); |
---|
801 | G4double costheta = deltaTkin*(totalEnergy + electron_mass_c2) |
---|
802 | /(deltaTotalMomentum * totalMomentum); |
---|
803 | |
---|
804 | if( costheta > 0.99999 ) costheta = 0.99999; |
---|
805 | G4double sintheta = 0.0; |
---|
806 | G4double sin2 = 1. - costheta*costheta; |
---|
807 | if( sin2 > 0.) sintheta = sqrt(sin2); |
---|
808 | |
---|
809 | // direction of the delta electron |
---|
810 | |
---|
811 | G4double phi = twopi*G4UniformRand(); |
---|
812 | G4double dirx = sintheta*cos(phi), diry = sintheta*sin(phi), dirz = costheta; |
---|
813 | |
---|
814 | G4ThreeVector deltaDirection(dirx,diry,dirz); |
---|
815 | deltaDirection.rotateUz(direction); |
---|
816 | |
---|
817 | // primary change |
---|
818 | |
---|
819 | kineticEnergy -= deltaTkin; |
---|
820 | G4ThreeVector dir = totalMomentum*direction - deltaTotalMomentum*deltaDirection; |
---|
821 | direction = dir.unit(); |
---|
822 | fParticleChange->SetProposedMomentumDirection(direction); |
---|
823 | |
---|
824 | // create G4DynamicParticle object for e- delta ray |
---|
825 | |
---|
826 | G4DynamicParticle* deltaRay = new G4DynamicParticle; |
---|
827 | deltaRay->SetDefinition(G4Electron::Electron()); |
---|
828 | deltaRay->SetKineticEnergy( deltaTkin ); |
---|
829 | deltaRay->SetMomentumDirection(deltaDirection); |
---|
830 | vdp->push_back(deltaRay); |
---|
831 | |
---|
832 | } |
---|
833 | else // secondary 'Cherenkov' photon |
---|
834 | { |
---|
835 | G4double deltaTkin = GetPostStepTransfer(fPAIphotonTable, fdNdxCutPhotonVector, |
---|
836 | iPlace,scaledTkin); |
---|
837 | |
---|
838 | // G4cout<<"PAIPhotonModel PhotonPostStepTransfer = "<<deltaTkin/keV<<" keV"<<G4endl ; |
---|
839 | |
---|
840 | if( deltaTkin <= 0. ) |
---|
841 | { |
---|
842 | G4cout<<"G4PAIPhotonModel::SampleSecondary gamma deltaTkin = "<<deltaTkin<<G4endl; |
---|
843 | } |
---|
844 | if( deltaTkin <= 0.) return; |
---|
845 | |
---|
846 | G4double costheta = 0.; // G4UniformRand(); // VG: ??? for start only |
---|
847 | G4double sintheta = sqrt((1.+costheta)*(1.-costheta)); |
---|
848 | |
---|
849 | // direction of the 'Cherenkov' photon |
---|
850 | G4double phi = twopi*G4UniformRand(); |
---|
851 | G4double dirx = sintheta*cos(phi), diry = sintheta*sin(phi), dirz = costheta; |
---|
852 | |
---|
853 | G4ThreeVector deltaDirection(dirx,diry,dirz); |
---|
854 | deltaDirection.rotateUz(direction); |
---|
855 | |
---|
856 | // primary change |
---|
857 | kineticEnergy -= deltaTkin; |
---|
858 | |
---|
859 | // create G4DynamicParticle object for photon ray |
---|
860 | |
---|
861 | G4DynamicParticle* photonRay = new G4DynamicParticle; |
---|
862 | photonRay->SetDefinition( G4Gamma::Gamma() ); |
---|
863 | photonRay->SetKineticEnergy( deltaTkin ); |
---|
864 | photonRay->SetMomentumDirection(deltaDirection); |
---|
865 | |
---|
866 | vdp->push_back(photonRay); |
---|
867 | } |
---|
868 | |
---|
869 | fParticleChange->SetProposedKineticEnergy(kineticEnergy); |
---|
870 | } |
---|
871 | |
---|
872 | |
---|
873 | /////////////////////////////////////////////////////////////////////// |
---|
874 | // |
---|
875 | // Returns post step PAI energy transfer > cut electron/photon energy according to passed |
---|
876 | // scaled kinetic energy of particle |
---|
877 | |
---|
878 | G4double |
---|
879 | G4PAIPhotonModel::GetPostStepTransfer( G4PhysicsTable* pTable, |
---|
880 | G4PhysicsLogVector* pVector, |
---|
881 | G4int iPlace, G4double scaledTkin ) |
---|
882 | { |
---|
883 | // G4cout<<"G4PAIPhotonModel::GetPostStepTransfer"<<G4endl ; |
---|
884 | |
---|
885 | G4int iTkin = iPlace+1, iTransfer; |
---|
886 | G4double transfer = 0.0, position, dNdxCut1, dNdxCut2, E1, E2, W1, W2, W ; |
---|
887 | |
---|
888 | dNdxCut1 = (*pVector)(iPlace) ; |
---|
889 | |
---|
890 | // G4cout<<"iPlace = "<<iPlace<<endl ; |
---|
891 | |
---|
892 | if(iTkin == fTotBin) // Fermi plato, try from left |
---|
893 | { |
---|
894 | position = dNdxCut1*G4UniformRand() ; |
---|
895 | |
---|
896 | for( iTransfer = 0; |
---|
897 | iTransfer < G4int((*pTable)(iPlace)->GetVectorLength()); iTransfer++ ) |
---|
898 | { |
---|
899 | if(position >= (*(*pTable)(iPlace))(iTransfer)) break ; |
---|
900 | } |
---|
901 | transfer = GetEnergyTransfer(pTable,iPlace,position,iTransfer); |
---|
902 | } |
---|
903 | else |
---|
904 | { |
---|
905 | dNdxCut2 = (*pVector)(iPlace+1) ; |
---|
906 | if(iTkin == 0) // Tkin is too small, trying from right only |
---|
907 | { |
---|
908 | position = dNdxCut2*G4UniformRand() ; |
---|
909 | |
---|
910 | for( iTransfer = 0; |
---|
911 | iTransfer < G4int((*pTable)(iPlace+1)->GetVectorLength()); iTransfer++ ) |
---|
912 | { |
---|
913 | if(position >= (*(*pTable)(iPlace+1))(iTransfer)) break ; |
---|
914 | } |
---|
915 | transfer = GetEnergyTransfer(pTable,iPlace+1,position,iTransfer); |
---|
916 | } |
---|
917 | else // general case: Tkin between two vectors of the material |
---|
918 | { |
---|
919 | E1 = fProtonEnergyVector->GetLowEdgeEnergy(iTkin - 1) ; |
---|
920 | E2 = fProtonEnergyVector->GetLowEdgeEnergy(iTkin) ; |
---|
921 | W = 1.0/(E2 - E1) ; |
---|
922 | W1 = (E2 - scaledTkin)*W ; |
---|
923 | W2 = (scaledTkin - E1)*W ; |
---|
924 | |
---|
925 | position = ( dNdxCut1*W1 + dNdxCut2*W2 )*G4UniformRand() ; |
---|
926 | |
---|
927 | // G4cout<<position<<"\t" ; |
---|
928 | |
---|
929 | G4int iTrMax1, iTrMax2, iTrMax; |
---|
930 | |
---|
931 | iTrMax1 = G4int((*pTable)(iPlace)->GetVectorLength()); |
---|
932 | iTrMax2 = G4int((*pTable)(iPlace+1)->GetVectorLength()); |
---|
933 | |
---|
934 | if (iTrMax1 >= iTrMax2) iTrMax = iTrMax2; |
---|
935 | else iTrMax = iTrMax1; |
---|
936 | |
---|
937 | for( iTransfer = 0; iTransfer < iTrMax; iTransfer++ ) |
---|
938 | { |
---|
939 | if( position >= |
---|
940 | ( (*(*pTable)(iPlace))(iTransfer)*W1 + |
---|
941 | (*(*pTable)(iPlace+1))(iTransfer)*W2) ) break ; |
---|
942 | } |
---|
943 | transfer = GetEnergyTransfer(pTable, iPlace, position, iTransfer); |
---|
944 | } |
---|
945 | } |
---|
946 | // G4cout<<"PAIPhotonModel PostStepTransfer = "<<transfer/keV<<" keV"<<G4endl ; |
---|
947 | if(transfer < 0.0 ) transfer = 0.0 ; |
---|
948 | return transfer ; |
---|
949 | } |
---|
950 | |
---|
951 | /////////////////////////////////////////////////////////////////////// |
---|
952 | // |
---|
953 | // Returns random PAI energy transfer according to passed |
---|
954 | // indexes of particle |
---|
955 | |
---|
956 | G4double |
---|
957 | G4PAIPhotonModel::GetEnergyTransfer( G4PhysicsTable* pTable, G4int iPlace, |
---|
958 | G4double position, G4int iTransfer ) |
---|
959 | { |
---|
960 | G4int iTransferMax; |
---|
961 | G4double x1, x2, y1, y2, energyTransfer; |
---|
962 | |
---|
963 | if(iTransfer == 0) |
---|
964 | { |
---|
965 | energyTransfer = (*pTable)(iPlace)->GetLowEdgeEnergy(iTransfer); |
---|
966 | } |
---|
967 | else |
---|
968 | { |
---|
969 | iTransferMax = G4int((*pTable)(iPlace)->GetVectorLength()); |
---|
970 | |
---|
971 | if ( iTransfer >= iTransferMax) iTransfer = iTransferMax - 1; |
---|
972 | |
---|
973 | y1 = (*(*pTable)(iPlace))(iTransfer-1); |
---|
974 | y2 = (*(*fPAItransferTable)(iPlace))(iTransfer); |
---|
975 | |
---|
976 | x1 = (*pTable)(iPlace)->GetLowEdgeEnergy(iTransfer-1); |
---|
977 | x2 = (*pTable)(iPlace)->GetLowEdgeEnergy(iTransfer); |
---|
978 | |
---|
979 | if ( x1 == x2 ) energyTransfer = x2; |
---|
980 | else |
---|
981 | { |
---|
982 | if ( y1 == y2 ) energyTransfer = x1 + (x2 - x1)*G4UniformRand(); |
---|
983 | else |
---|
984 | { |
---|
985 | energyTransfer = x1 + (position - y1)*(x2 - x1)/(y2 - y1); |
---|
986 | } |
---|
987 | } |
---|
988 | } |
---|
989 | return energyTransfer; |
---|
990 | } |
---|
991 | |
---|
992 | /////////////////////////////////////////////////////////////////////// |
---|
993 | // |
---|
994 | // Works like AlongStepDoIt method of process family |
---|
995 | |
---|
996 | |
---|
997 | |
---|
998 | |
---|
999 | G4double G4PAIPhotonModel::SampleFluctuations( const G4Material* material, |
---|
1000 | const G4DynamicParticle* aParticle, |
---|
1001 | G4double&, |
---|
1002 | G4double& step, |
---|
1003 | G4double&) |
---|
1004 | { |
---|
1005 | size_t jMat; |
---|
1006 | for( jMat = 0 ;jMat < fMaterialCutsCoupleVector.size() ; ++jMat ) |
---|
1007 | { |
---|
1008 | if( material == fMaterialCutsCoupleVector[jMat]->GetMaterial() ) break; |
---|
1009 | } |
---|
1010 | if(jMat == fMaterialCutsCoupleVector.size() && jMat > 0) jMat--; |
---|
1011 | |
---|
1012 | fPAItransferTable = fPAIxscBank[jMat]; |
---|
1013 | fPAIphotonTable = fPAIphotonBank[jMat]; |
---|
1014 | fPAIplasmonTable = fPAIplasmonBank[jMat]; |
---|
1015 | |
---|
1016 | fdNdxCutVector = fdNdxCutTable[jMat]; |
---|
1017 | fdNdxCutPhotonVector = fdNdxCutPhotonTable[jMat]; |
---|
1018 | fdNdxCutPlasmonVector = fdNdxCutPlasmonTable[jMat]; |
---|
1019 | |
---|
1020 | G4int iTkin, iPlace ; |
---|
1021 | |
---|
1022 | // G4cout<<"G4PAIPhotonModel::SampleFluctuations"<<G4endl ; |
---|
1023 | |
---|
1024 | G4double loss, photonLoss, plasmonLoss, charge2 ; |
---|
1025 | |
---|
1026 | |
---|
1027 | G4double Tkin = aParticle->GetKineticEnergy() ; |
---|
1028 | G4double MassRatio = proton_mass_c2/aParticle->GetDefinition()->GetPDGMass() ; |
---|
1029 | G4double charge = aParticle->GetDefinition()->GetPDGCharge() ; |
---|
1030 | charge2 = charge*charge ; |
---|
1031 | G4double scaledTkin = Tkin*MassRatio ; |
---|
1032 | G4double cof = step*charge2; |
---|
1033 | |
---|
1034 | for( iTkin = 0; iTkin < fTotBin; iTkin++) |
---|
1035 | { |
---|
1036 | if(scaledTkin < fProtonEnergyVector->GetLowEdgeEnergy(iTkin)) break ; |
---|
1037 | } |
---|
1038 | iPlace = iTkin - 1 ; |
---|
1039 | if( iPlace < 0 ) iPlace = 0; |
---|
1040 | |
---|
1041 | photonLoss = GetAlongStepTransfer(fPAIphotonTable,fdNdxCutPhotonVector, |
---|
1042 | iPlace,scaledTkin,step,cof); |
---|
1043 | |
---|
1044 | // G4cout<<"PAIPhotonModel AlongStepPhotonLoss = "<<photonLoss/keV<<" keV"<<G4endl ; |
---|
1045 | |
---|
1046 | plasmonLoss = GetAlongStepTransfer(fPAIplasmonTable,fdNdxCutPlasmonVector, |
---|
1047 | iPlace,scaledTkin,step,cof); |
---|
1048 | |
---|
1049 | // G4cout<<"PAIPhotonModel AlongStepPlasmonLoss = "<<plasmonLoss/keV<<" keV"<<G4endl ; |
---|
1050 | |
---|
1051 | loss = photonLoss + plasmonLoss; |
---|
1052 | |
---|
1053 | // G4cout<<"PAIPhotonModel AlongStepLoss = "<<loss/keV<<" keV"<<G4endl ; |
---|
1054 | |
---|
1055 | return loss; |
---|
1056 | } |
---|
1057 | |
---|
1058 | /////////////////////////////////////////////////////////////////////// |
---|
1059 | // |
---|
1060 | // Returns along step PAI energy transfer < cut electron/photon energy according to passed |
---|
1061 | // scaled kinetic energy of particle and cof = step*charge*charge |
---|
1062 | |
---|
1063 | G4double |
---|
1064 | G4PAIPhotonModel::GetAlongStepTransfer( G4PhysicsTable* pTable, |
---|
1065 | G4PhysicsLogVector* pVector, |
---|
1066 | G4int iPlace, G4double scaledTkin,G4double step, |
---|
1067 | G4double cof ) |
---|
1068 | { |
---|
1069 | G4int iTkin = iPlace + 1, iTransfer; |
---|
1070 | G4double loss = 0., position, E1, E2, W1, W2, W, dNdxCut1, dNdxCut2, meanNumber; |
---|
1071 | G4double lambda, stepDelta, stepSum=0. ; |
---|
1072 | G4long numOfCollisions=0; |
---|
1073 | G4bool numb = true; |
---|
1074 | |
---|
1075 | dNdxCut1 = (*pVector)(iPlace) ; |
---|
1076 | |
---|
1077 | // G4cout<<"iPlace = "<<iPlace<<endl ; |
---|
1078 | |
---|
1079 | if(iTkin == fTotBin) // Fermi plato, try from left |
---|
1080 | { |
---|
1081 | meanNumber = ((*(*pTable)(iPlace))(0) - dNdxCut1)*cof; |
---|
1082 | if(meanNumber < 0.) meanNumber = 0. ; |
---|
1083 | // numOfCollisions = RandPoisson::shoot(meanNumber) ; |
---|
1084 | if( meanNumber > 0.) lambda = step/meanNumber; |
---|
1085 | else lambda = DBL_MAX; |
---|
1086 | while(numb) |
---|
1087 | { |
---|
1088 | stepDelta = CLHEP::RandExponential::shoot(lambda); |
---|
1089 | stepSum += stepDelta; |
---|
1090 | if(stepSum >= step) break; |
---|
1091 | numOfCollisions++; |
---|
1092 | } |
---|
1093 | |
---|
1094 | // G4cout<<"numOfCollisions = "<<numOfCollisions<<G4endl ; |
---|
1095 | |
---|
1096 | while(numOfCollisions) |
---|
1097 | { |
---|
1098 | position = dNdxCut1+ |
---|
1099 | ((*(*pTable)(iPlace))(0) - dNdxCut1)*G4UniformRand() ; |
---|
1100 | |
---|
1101 | for( iTransfer = 0; |
---|
1102 | iTransfer < G4int((*pTable)(iPlace)->GetVectorLength()); iTransfer++ ) |
---|
1103 | { |
---|
1104 | if(position >= (*(*pTable)(iPlace))(iTransfer)) break ; |
---|
1105 | } |
---|
1106 | loss += GetEnergyTransfer(pTable,iPlace,position,iTransfer); |
---|
1107 | numOfCollisions-- ; |
---|
1108 | } |
---|
1109 | } |
---|
1110 | else |
---|
1111 | { |
---|
1112 | dNdxCut2 = (*pVector)(iPlace+1) ; |
---|
1113 | |
---|
1114 | if(iTkin == 0) // Tkin is too small, trying from right only |
---|
1115 | { |
---|
1116 | meanNumber = ((*(*pTable)(iPlace+1))(0) - dNdxCut2)*cof; |
---|
1117 | if( meanNumber < 0. ) meanNumber = 0. ; |
---|
1118 | // numOfCollisions = CLHEP::RandPoisson::shoot(meanNumber) ; |
---|
1119 | if( meanNumber > 0.) lambda = step/meanNumber; |
---|
1120 | else lambda = DBL_MAX; |
---|
1121 | while(numb) |
---|
1122 | { |
---|
1123 | stepDelta = CLHEP::RandExponential::shoot(lambda); |
---|
1124 | stepSum += stepDelta; |
---|
1125 | if(stepSum >= step) break; |
---|
1126 | numOfCollisions++; |
---|
1127 | } |
---|
1128 | |
---|
1129 | // G4cout<<"numOfCollisions = "<<numOfCollisions<<G4endl ; |
---|
1130 | |
---|
1131 | while(numOfCollisions) |
---|
1132 | { |
---|
1133 | position = dNdxCut2+ |
---|
1134 | ((*(*pTable)(iPlace+1))(0) - dNdxCut2)*G4UniformRand(); |
---|
1135 | |
---|
1136 | for( iTransfer = 0; |
---|
1137 | iTransfer < G4int((*pTable)(iPlace+1)->GetVectorLength()); iTransfer++ ) |
---|
1138 | { |
---|
1139 | if(position >= (*(*pTable)(iPlace+1))(iTransfer)) break ; |
---|
1140 | } |
---|
1141 | loss += GetEnergyTransfer(pTable,iPlace+1,position,iTransfer); |
---|
1142 | numOfCollisions-- ; |
---|
1143 | } |
---|
1144 | } |
---|
1145 | else // general case: Tkin between two vectors of the material |
---|
1146 | { |
---|
1147 | E1 = fProtonEnergyVector->GetLowEdgeEnergy(iTkin - 1) ; |
---|
1148 | E2 = fProtonEnergyVector->GetLowEdgeEnergy(iTkin) ; |
---|
1149 | W = 1.0/(E2 - E1) ; |
---|
1150 | W1 = (E2 - scaledTkin)*W ; |
---|
1151 | W2 = (scaledTkin - E1)*W ; |
---|
1152 | |
---|
1153 | // G4cout<<"(*(*pTable)(iPlace))(0) = "<< |
---|
1154 | // (*(*pTable)(iPlace))(0)<<G4endl ; |
---|
1155 | // G4cout<<"(*(*pTable)(iPlace+1))(0) = "<< |
---|
1156 | // (*(*pTable)(iPlace+1))(0)<<G4endl ; |
---|
1157 | |
---|
1158 | meanNumber=( ((*(*pTable)(iPlace))(0)-dNdxCut1)*W1 + |
---|
1159 | ((*(*pTable)(iPlace+1))(0)-dNdxCut2)*W2 )*cof; |
---|
1160 | if(meanNumber<0.0) meanNumber = 0.0; |
---|
1161 | // numOfCollisions = CLHEP::RandPoisson::shoot(meanNumber) ; |
---|
1162 | if( meanNumber > 0.) lambda = step/meanNumber; |
---|
1163 | else lambda = DBL_MAX; |
---|
1164 | while(numb) |
---|
1165 | { |
---|
1166 | stepDelta = CLHEP::RandExponential::shoot(lambda); |
---|
1167 | stepSum += stepDelta; |
---|
1168 | if(stepSum >= step) break; |
---|
1169 | numOfCollisions++; |
---|
1170 | } |
---|
1171 | |
---|
1172 | // G4cout<<"numOfCollisions = "<<numOfCollisions<<endl ; |
---|
1173 | |
---|
1174 | while(numOfCollisions) |
---|
1175 | { |
---|
1176 | position = dNdxCut1*W1 + dNdxCut2*W2 + |
---|
1177 | ( ( (*(*pTable)(iPlace ))(0) - dNdxCut1)*W1 + |
---|
1178 | |
---|
1179 | ( (*(*pTable)(iPlace+1))(0) - dNdxCut2)*W2 )*G4UniformRand(); |
---|
1180 | |
---|
1181 | // G4cout<<position<<"\t" ; |
---|
1182 | |
---|
1183 | for( iTransfer = 0; |
---|
1184 | iTransfer < G4int((*pTable)(iPlace)->GetVectorLength()); iTransfer++ ) |
---|
1185 | { |
---|
1186 | if( position >= |
---|
1187 | ( (*(*pTable)(iPlace))(iTransfer)*W1 + |
---|
1188 | (*(*pTable)(iPlace+1))(iTransfer)*W2) ) |
---|
1189 | { |
---|
1190 | break ; |
---|
1191 | } |
---|
1192 | } |
---|
1193 | // loss += (*pTable)(iPlace)->GetLowEdgeEnergy(iTransfer) ; |
---|
1194 | loss += GetEnergyTransfer(pTable,iPlace,position,iTransfer); |
---|
1195 | numOfCollisions-- ; |
---|
1196 | } |
---|
1197 | } |
---|
1198 | } |
---|
1199 | |
---|
1200 | return loss ; |
---|
1201 | |
---|
1202 | } |
---|
1203 | |
---|
1204 | ////////////////////////////////////////////////////////////////////// |
---|
1205 | // |
---|
1206 | // Returns the statistical estimation of the energy loss distribution variance |
---|
1207 | // |
---|
1208 | |
---|
1209 | |
---|
1210 | G4double G4PAIPhotonModel::Dispersion( const G4Material* material, |
---|
1211 | const G4DynamicParticle* aParticle, |
---|
1212 | G4double& tmax, |
---|
1213 | G4double& step ) |
---|
1214 | { |
---|
1215 | G4double loss, sumLoss=0., sumLoss2=0., sigma2, meanLoss=0.; |
---|
1216 | for(G4int i = 0 ; i < fMeanNumber; i++) |
---|
1217 | { |
---|
1218 | loss = SampleFluctuations(material,aParticle,tmax,step,meanLoss); |
---|
1219 | sumLoss += loss; |
---|
1220 | sumLoss2 += loss*loss; |
---|
1221 | } |
---|
1222 | meanLoss = sumLoss/fMeanNumber; |
---|
1223 | sigma2 = meanLoss*meanLoss + (sumLoss2-2*sumLoss*meanLoss)/fMeanNumber; |
---|
1224 | return sigma2; |
---|
1225 | } |
---|
1226 | |
---|
1227 | |
---|
1228 | // |
---|
1229 | // |
---|
1230 | ///////////////////////////////////////////////// |
---|
1231 | |
---|
1232 | |
---|
1233 | |
---|
1234 | |
---|
1235 | |
---|
1236 | |
---|