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 | // Initialise all variables |
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62 | // Position distribution Variables |
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63 | |
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64 | NumberOfParticlesToBeGenerated = 1; |
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65 | particle_definition = G4Geantino::GeantinoDefinition(); |
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66 | G4ThreeVector zero; |
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67 | particle_momentum_direction = G4ParticleMomentum(1, 0, 0); |
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68 | particle_energy = 1.0 * MeV; |
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69 | particle_position = zero; |
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70 | particle_time = 0.0; |
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71 | particle_polarization = zero; |
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72 | particle_charge = 0.0; |
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73 | particle_weight = 1.0; |
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74 | |
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75 | biasRndm = new G4SPSRandomGenerator(); |
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76 | posGenerator = new G4SPSPosDistribution(); |
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77 | posGenerator->SetBiasRndm(biasRndm); |
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78 | angGenerator = new G4SPSAngDistribution(); |
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79 | angGenerator->SetPosDistribution(posGenerator); |
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80 | angGenerator->SetBiasRndm(biasRndm); |
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81 | eneGenerator = new G4SPSEneDistribution(); |
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82 | eneGenerator->SetBiasRndm(biasRndm); |
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83 | |
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84 | // verbosity |
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85 | verbosityLevel = 0; |
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86 | |
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87 | } |
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88 | |
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89 | G4SingleParticleSource::~G4SingleParticleSource() { |
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90 | delete biasRndm; |
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91 | delete posGenerator; |
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92 | delete angGenerator; |
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93 | delete eneGenerator; |
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94 | } |
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95 | |
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96 | void G4SingleParticleSource::SetVerbosity(int vL) { |
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97 | verbosityLevel = vL; |
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98 | posGenerator->SetVerbosity(vL); |
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99 | angGenerator->SetVerbosity(vL); |
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100 | eneGenerator->SetVerbosity(vL); |
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101 | G4cout << "Verbosity Set to: " << verbosityLevel << G4endl; |
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102 | } |
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103 | |
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104 | void G4SingleParticleSource::SetParticleDefinition( |
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105 | G4ParticleDefinition* aParticleDefinition) { |
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106 | particle_definition = aParticleDefinition; |
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107 | particle_charge = particle_definition->GetPDGCharge(); |
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108 | } |
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109 | |
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110 | void G4SingleParticleSource::GeneratePrimaryVertex(G4Event *evt) { |
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111 | if (particle_definition == NULL) |
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112 | return; |
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113 | |
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114 | if (verbosityLevel > 1) |
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115 | G4cout << " NumberOfParticlesToBeGenerated: " |
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116 | << NumberOfParticlesToBeGenerated << G4endl; |
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117 | |
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118 | // Position stuff |
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119 | particle_position = posGenerator->GenerateOne(); |
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120 | |
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121 | // create a new vertex |
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122 | G4PrimaryVertex* vertex = new G4PrimaryVertex(particle_position, |
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123 | particle_time); |
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124 | |
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125 | for (G4int i = 0; i < NumberOfParticlesToBeGenerated; i++) { |
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126 | // Angular stuff |
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127 | particle_momentum_direction = angGenerator->GenerateOne(); |
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128 | // Energy stuff |
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129 | particle_energy = eneGenerator->GenerateOne(particle_definition); |
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130 | |
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131 | if (verbosityLevel >= 2) |
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132 | G4cout << "Creating primaries and assigning to vertex" << G4endl; |
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133 | // create new primaries and set them to the vertex |
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134 | G4double mass = particle_definition->GetPDGMass(); |
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135 | G4double energy = particle_energy + mass; |
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136 | G4double pmom = std::sqrt(energy * energy - mass * mass); |
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137 | G4double px = pmom * particle_momentum_direction.x(); |
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138 | G4double py = pmom * particle_momentum_direction.y(); |
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139 | G4double pz = pmom * particle_momentum_direction.z(); |
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140 | |
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141 | if (verbosityLevel > 1) { |
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142 | G4cout << "Particle name: " |
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143 | << particle_definition->GetParticleName() << G4endl; |
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144 | G4cout << " Energy: " << particle_energy << G4endl; |
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145 | G4cout << " Position: " << particle_position << G4endl; |
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146 | G4cout << " Direction: " << particle_momentum_direction |
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147 | << G4endl; |
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148 | } |
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149 | G4PrimaryParticle* particle = new G4PrimaryParticle( |
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150 | particle_definition, px, py, pz); |
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151 | particle->SetMass(mass); |
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152 | particle->SetCharge(particle_charge); |
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153 | particle->SetPolarization(particle_polarization.x(), |
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154 | particle_polarization.y(), particle_polarization.z()); |
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155 | // Set bweight equal to the multiple of all non-zero weights |
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156 | particle_weight = eneGenerator->GetWeight()*biasRndm->GetBiasWeight(); |
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157 | // pass it to primary particle |
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158 | particle->SetWeight(particle_weight); |
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159 | |
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160 | vertex->SetPrimary(particle); |
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161 | |
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162 | } |
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163 | // now pass the weight to the primary vertex. CANNOT be used here! |
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164 | // vertex->SetWeight(particle_weight); |
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165 | evt->AddPrimaryVertex(vertex); |
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166 | if (verbosityLevel > 1) |
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167 | G4cout << " Primary Vetex generated !" << G4endl; |
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168 | } |
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169 | |
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