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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27 | // $Id: GammaRayTelPrimaryGeneratorAction.cc,v 1.11 2007/11/09 16:33:34 flongo Exp $ |
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28 | // GEANT4 tag $Name: geant4-09-03-cand-01 $ |
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29 | // ------------------------------------------------------------ |
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30 | // GEANT 4 class implementation file |
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31 | // CERN Geneva Switzerland |
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32 | // |
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33 | // |
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34 | // ------------ GammaRayTelPrimaryGeneratorAction ------ |
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35 | // by G.Santin, F.Longo & R.Giannitrapani (13 nov 2000) |
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36 | // |
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37 | // ************************************************************ |
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38 | |
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39 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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40 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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41 | |
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42 | #include "G4RunManager.hh" |
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43 | #include "GammaRayTelPrimaryGeneratorAction.hh" |
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44 | |
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45 | #include "GammaRayTelDetectorConstruction.hh" |
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46 | #include "GammaRayTelPrimaryGeneratorMessenger.hh" |
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47 | |
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48 | #include "G4Event.hh" |
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49 | #include "G4ParticleGun.hh" |
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50 | #include "G4GeneralParticleSource.hh" |
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51 | #include "G4ParticleTable.hh" |
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52 | #include "G4ParticleDefinition.hh" |
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53 | #include "Randomize.hh" |
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54 | |
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55 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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56 | |
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57 | GammaRayTelPrimaryGeneratorAction::GammaRayTelPrimaryGeneratorAction() |
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58 | :rndmFlag("off"),nSourceType(0),nSpectrumType(0) |
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59 | { |
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60 | G4RunManager* runManager = G4RunManager::GetRunManager(); |
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61 | GammaRayTelDetector = |
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62 | (GammaRayTelDetectorConstruction*)(runManager->GetUserDetectorConstruction()); |
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63 | |
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64 | |
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65 | //create a messenger for this class |
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66 | |
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67 | gunMessenger = new GammaRayTelPrimaryGeneratorMessenger(this); |
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68 | |
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69 | G4int n_particle = 1; |
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70 | |
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71 | particleGun = new G4ParticleGun(n_particle); |
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72 | // default particle kinematic |
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73 | |
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74 | G4ParticleTable* particleTable = G4ParticleTable::GetParticleTable(); |
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75 | G4String particleName; |
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76 | G4ParticleDefinition* particle |
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77 | = particleTable->FindParticle(particleName="e-"); |
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78 | particleGun->SetParticleDefinition(particle); |
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79 | particleGun->SetParticleMomentumDirection(G4ThreeVector(0.,0.,-1.)); |
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80 | particleGun->SetParticleEnergy(30.*MeV); |
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81 | G4double position = 0.5*(GammaRayTelDetector->GetWorldSizeZ()); |
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82 | particleGun->SetParticlePosition(G4ThreeVector(0.*cm,0.*cm,position)); |
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83 | particleSource = new G4GeneralParticleSource(); |
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84 | |
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85 | } |
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86 | |
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87 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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88 | |
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89 | GammaRayTelPrimaryGeneratorAction::~GammaRayTelPrimaryGeneratorAction() |
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90 | { |
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91 | if (sourceGun) |
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92 | delete particleGun; |
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93 | else |
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94 | delete particleSource; |
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95 | |
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96 | delete gunMessenger; |
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97 | } |
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98 | |
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99 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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100 | |
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101 | void GammaRayTelPrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent) |
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102 | { |
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103 | if (sourceGun) |
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104 | { |
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105 | |
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106 | //this function is called at the begining of event |
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107 | // |
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108 | G4double z0 = 0.5*(GammaRayTelDetector->GetWorldSizeZ()); |
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109 | G4double x0 = 0.*cm, y0 = 0.*cm; |
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110 | |
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111 | G4ThreeVector pos0; |
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112 | G4ThreeVector dir0; |
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113 | G4ThreeVector vertex0 = G4ThreeVector(x0,y0,z0); |
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114 | |
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115 | dir0 = G4ThreeVector(0.,0.,-1.); |
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116 | |
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117 | G4double theta, phi, y, f; |
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118 | G4double theta0=0.; |
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119 | G4double phi0=0.; |
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120 | |
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121 | switch(nSourceType) { |
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122 | case 0: |
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123 | particleGun->SetParticlePosition(vertex0); |
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124 | particleGun->SetParticleMomentumDirection(dir0); |
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125 | break; |
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126 | case 1: |
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127 | // GS: Generate random position on the 4PIsphere to create a unif. distrib. |
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128 | // GS: on the sphere |
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129 | phi = G4UniformRand() * twopi; |
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130 | do { |
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131 | y = G4UniformRand()*1.0; |
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132 | theta = G4UniformRand() * pi; |
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133 | f = std::sin(theta); |
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134 | } while (y > f); |
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135 | vertex0 = G4ThreeVector(1.,0.,0.); |
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136 | vertex0.setMag(dVertexRadius); |
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137 | vertex0.setTheta(theta); |
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138 | vertex0.setPhi(phi); |
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139 | particleGun->SetParticlePosition(vertex0); |
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140 | |
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141 | dir0 = G4ThreeVector(1.,0.,0.); |
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142 | do { |
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143 | phi = G4UniformRand() * twopi; |
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144 | do { |
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145 | y = G4UniformRand()*1.0; |
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146 | theta = G4UniformRand() * pi; |
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147 | f = std::sin(theta); |
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148 | } while (y > f); |
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149 | dir0.setPhi(phi); |
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150 | dir0.setTheta(theta); |
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151 | } while (vertex0.dot(dir0) >= -0.7 * vertex0.mag()); |
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152 | particleGun->SetParticleMomentumDirection((G4ParticleMomentum)dir0); |
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153 | |
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154 | break; |
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155 | case 2: |
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156 | // GS: Generate random position on the upper semi-sphere z>0 to create a unif. distrib. |
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157 | // GS: on a plane |
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158 | phi = G4UniformRand() * twopi; |
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159 | do { |
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160 | y = G4UniformRand()*1.0; |
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161 | theta = G4UniformRand() * halfpi; |
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162 | f = std::sin(theta) * std::cos(theta); |
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163 | } while (y > f); |
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164 | vertex0 = G4ThreeVector(1.,0.,0.); |
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165 | |
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166 | G4double xy = GammaRayTelDetector->GetWorldSizeXY(); |
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167 | G4double z = GammaRayTelDetector->GetWorldSizeZ(); |
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168 | |
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169 | if (dVertexRadius > xy*0.5) |
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170 | { |
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171 | G4cout << "vertexRadius too big " << G4endl; |
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172 | G4cout << "vertexRadius setted to " << xy*0.45 << G4endl; |
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173 | dVertexRadius = xy*0.45; |
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174 | } |
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175 | |
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176 | if (dVertexRadius > z*0.5) |
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177 | { |
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178 | G4cout << "vertexRadius too high " << G4endl; |
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179 | G4cout << "vertexRadius setted to " << z*0.45 << G4endl; |
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180 | dVertexRadius = z*0.45; |
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181 | } |
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182 | |
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183 | |
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184 | vertex0.setMag(dVertexRadius); |
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185 | vertex0.setTheta(theta); |
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186 | vertex0.setPhi(phi); |
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187 | |
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188 | // GS: Get the user defined direction for the primaries and |
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189 | // GS: Rotate the random position according to the user defined direction for the particle |
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190 | |
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191 | dir0 = particleGun->GetParticleMomentumDirection(); |
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192 | if (dir0.mag() > 0.001) |
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193 | { |
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194 | theta0 = dir0.theta(); |
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195 | phi0 = dir0.phi(); |
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196 | } |
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197 | |
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198 | if (theta0!=0.) |
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199 | { |
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200 | G4ThreeVector rotationAxis(1.,0.,0.); |
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201 | rotationAxis.setPhi(phi0+halfpi); |
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202 | vertex0.rotate(theta0+pi,rotationAxis); |
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203 | } |
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204 | particleGun->SetParticlePosition(vertex0); |
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205 | break; |
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206 | } |
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207 | |
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208 | |
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209 | G4double pEnergy; |
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210 | |
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211 | switch(nSpectrumType) { |
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212 | case 0: |
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213 | break; |
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214 | case 1: |
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215 | break; |
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216 | case 2: |
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217 | do { |
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218 | y = G4UniformRand()*100000.0; |
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219 | pEnergy = G4UniformRand() * 10. * GeV; |
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220 | f = std::pow(pEnergy * (1/GeV), -4.); |
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221 | } while (y > f); |
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222 | |
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223 | particleGun->SetParticleEnergy(pEnergy); |
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224 | |
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225 | break; |
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226 | case 3: |
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227 | break; |
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228 | } |
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229 | |
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230 | particleGun->GeneratePrimaryVertex(anEvent); |
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231 | } |
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232 | else |
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233 | { |
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234 | particleSource->GeneratePrimaryVertex(anEvent); |
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235 | } |
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236 | |
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237 | } |
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238 | |
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239 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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240 | |
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241 | |
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242 | |
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243 | |
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244 | |
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245 | |
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247 | |
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