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 | /////////////////////////////////////////////////////////////////////////////// |
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28 | // |
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29 | // MODULE: G4SingleParticleSource.hh |
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30 | // |
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31 | // Version: 1.0 |
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32 | // Date: 5/02/04 |
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33 | // Author: Fan Lei |
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34 | // Organisation: QinetiQ ltd. |
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35 | // Customer: ESA/ESTEC |
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36 | // |
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37 | /////////////////////////////////////////////////////////////////////////////// |
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38 | // |
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39 | // CHANGE HISTORY |
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40 | // -------------- |
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41 | // |
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42 | // Version 1.0, 05/02/2004, Fan Lei, Created. |
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43 | // Based on the G4GeneralParticleSource class in Geant4 v6.0 |
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44 | // |
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45 | /////////////////////////////////////////////////////////////////////////////// |
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46 | // |
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47 | #include "G4PrimaryParticle.hh" |
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48 | #include "G4Event.hh" |
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49 | #include "Randomize.hh" |
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50 | #include <cmath> |
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51 | #include "G4ParticleTable.hh" |
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52 | #include "G4Geantino.hh" |
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53 | #include "G4ParticleDefinition.hh" |
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54 | #include "G4IonTable.hh" |
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55 | #include "G4Ions.hh" |
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56 | #include "G4TrackingManager.hh" |
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57 | #include "G4Track.hh" |
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58 | #include "G4SingleParticleSource.hh" |
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59 | |
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60 | G4SingleParticleSource::G4SingleParticleSource() |
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61 | { |
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62 | // Initialise all variables |
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63 | // Position distribution Variables |
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64 | |
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65 | NumberOfParticlesToBeGenerated = 1; |
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66 | particle_definition = G4Geantino::GeantinoDefinition(); |
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67 | G4ThreeVector zero; |
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68 | particle_momentum_direction = G4ParticleMomentum(1,0,0); |
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69 | particle_energy = 1.0*MeV; |
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70 | particle_position = zero; |
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71 | particle_time = 0.0; |
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72 | particle_polarization = zero; |
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73 | particle_charge = 0.0; |
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74 | particle_weight = 1.0; |
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75 | |
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76 | biasRndm = new G4SPSRandomGenerator(); |
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77 | posGenerator = new G4SPSPosDistribution(); |
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78 | posGenerator->SetBiasRndm(biasRndm); |
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79 | angGenerator = new G4SPSAngDistribution(); |
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80 | angGenerator->SetPosDistribution(posGenerator); |
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81 | angGenerator->SetBiasRndm(biasRndm); |
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82 | eneGenerator = new G4SPSEneDistribution(); |
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83 | eneGenerator->SetBiasRndm(biasRndm); |
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84 | |
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85 | // verbosity |
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86 | verbosityLevel = 0; |
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87 | |
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88 | } |
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89 | |
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90 | G4SingleParticleSource::~G4SingleParticleSource() |
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91 | {} |
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92 | |
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93 | void G4SingleParticleSource::SetVerbosity(int vL) |
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94 | { |
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95 | verbosityLevel = vL; |
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96 | posGenerator->SetVerbosity(vL); |
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97 | angGenerator->SetVerbosity(vL); |
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98 | eneGenerator->SetVerbosity(vL); |
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99 | G4cout << "Verbosity Set to: " << verbosityLevel << G4endl; |
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100 | } |
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101 | |
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102 | void G4SingleParticleSource::SetParticleDefinition |
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103 | (G4ParticleDefinition* aParticleDefinition) |
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104 | { |
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105 | particle_definition = aParticleDefinition; |
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106 | particle_charge = particle_definition->GetPDGCharge(); |
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107 | } |
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108 | |
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109 | void G4SingleParticleSource::GeneratePrimaryVertex(G4Event *evt) |
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110 | { |
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111 | if(particle_definition==NULL) return; |
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112 | |
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113 | if(verbosityLevel > 1) |
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114 | G4cout << " NumberOfParticlesToBeGenerated: "<<NumberOfParticlesToBeGenerated << G4endl; |
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115 | |
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116 | // Position stuff |
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117 | particle_position = posGenerator->GenerateOne(); |
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118 | |
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119 | // create a new vertex |
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120 | G4PrimaryVertex* vertex = new G4PrimaryVertex(particle_position,particle_time); |
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121 | |
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122 | for( G4int i=0; i<NumberOfParticlesToBeGenerated; i++ ) { |
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123 | // Angular stuff |
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124 | particle_momentum_direction = angGenerator->GenerateOne(); |
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125 | // Energy stuff |
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126 | particle_energy = eneGenerator->GenerateOne(particle_definition); |
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127 | |
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128 | if(verbosityLevel >= 2) |
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129 | G4cout << "Creating primaries and assigning to vertex" << G4endl; |
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130 | // create new primaries and set them to the vertex |
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131 | G4double mass = particle_definition->GetPDGMass(); |
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132 | G4double energy = particle_energy + mass; |
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133 | G4double pmom = std::sqrt(energy*energy-mass*mass); |
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134 | G4double px = pmom*particle_momentum_direction.x(); |
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135 | G4double py = pmom*particle_momentum_direction.y(); |
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136 | G4double pz = pmom*particle_momentum_direction.z(); |
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137 | |
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138 | if(verbosityLevel > 1){ |
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139 | G4cout << "Particle name: "<<particle_definition->GetParticleName() << G4endl; |
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140 | G4cout << " Energy: "<<particle_energy << G4endl; |
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141 | G4cout << " Position: "<<particle_position<< G4endl; |
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142 | G4cout << " Direction: "<<particle_momentum_direction << G4endl; |
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143 | } |
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144 | G4PrimaryParticle* particle = |
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145 | new G4PrimaryParticle(particle_definition,px,py,pz); |
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146 | particle->SetMass( mass ); |
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147 | particle->SetCharge( particle_charge ); |
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148 | particle->SetPolarization(particle_polarization.x(), |
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149 | particle_polarization.y(), |
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150 | particle_polarization.z()); |
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151 | // Set bweight equal to the multiple of all non-zero weights |
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152 | particle_weight = biasRndm->GetBiasWeight(); |
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153 | // pass it to primary particle |
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154 | particle->SetWeight(particle_weight); |
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155 | |
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156 | vertex->SetPrimary( particle ); |
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157 | |
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158 | } |
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159 | // now pass the weight to the primary vertex. CANNOT be used here! |
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160 | // vertex->SetWeight(particle_weight); |
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161 | evt->AddPrimaryVertex( vertex ); |
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162 | if(verbosityLevel > 1) |
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163 | G4cout << " Primary Vetex generated !"<< G4endl; |
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164 | } |
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165 | |
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166 | |
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173 | |
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