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: G4PrimaryTransformer.cc,v 1.27 2006/06/29 18:09:58 gunter Exp $ |
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28 | // GEANT4 tag $Name: $ |
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29 | // |
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30 | |
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31 | #include "G4PrimaryTransformer.hh" |
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32 | #include "G4Event.hh" |
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33 | #include "G4PrimaryVertex.hh" |
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34 | #include "G4ParticleDefinition.hh" |
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35 | #include "G4DynamicParticle.hh" |
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36 | #include "G4Track.hh" |
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37 | #include "G4ThreeVector.hh" |
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38 | #include "G4DecayProducts.hh" |
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39 | #include "G4UnitsTable.hh" |
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40 | #include "G4ios.hh" |
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41 | #include "Randomize.hh" |
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42 | |
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43 | G4PrimaryTransformer::G4PrimaryTransformer() |
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44 | :verboseLevel(0),trackID(0),unknown(0),unknownParticleDefined(false) |
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45 | { |
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46 | particleTable = G4ParticleTable::GetParticleTable(); |
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47 | CheckUnknown(); |
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48 | } |
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49 | |
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50 | G4PrimaryTransformer::~G4PrimaryTransformer() |
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51 | {;} |
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52 | |
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53 | void G4PrimaryTransformer::CheckUnknown() |
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54 | { |
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55 | unknown = particleTable->FindParticle("unknown"); |
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56 | if(unknown) |
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57 | { unknownParticleDefined = true; } |
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58 | else |
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59 | { unknownParticleDefined = false; } |
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60 | } |
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61 | |
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62 | G4TrackVector* G4PrimaryTransformer::GimmePrimaries(G4Event* anEvent,G4int trackIDCounter) |
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63 | { |
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64 | trackID = trackIDCounter; |
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65 | |
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66 | //TV.clearAndDestroy(); |
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67 | for( size_t ii=0; ii<TV.size();ii++) |
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68 | { delete TV[ii]; } |
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69 | TV.clear(); |
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70 | G4int n_vertex = anEvent->GetNumberOfPrimaryVertex(); |
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71 | if(n_vertex==0) return 0; |
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72 | for( G4int i=0; i<n_vertex; i++ ) |
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73 | { GenerateTracks( anEvent->GetPrimaryVertex(i) ); } |
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74 | return &TV; |
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75 | } |
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76 | |
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77 | void G4PrimaryTransformer::GenerateTracks(G4PrimaryVertex* primaryVertex) |
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78 | { |
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79 | G4double X0 = primaryVertex->GetX0(); |
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80 | G4double Y0 = primaryVertex->GetY0(); |
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81 | G4double Z0 = primaryVertex->GetZ0(); |
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82 | G4double T0 = primaryVertex->GetT0(); |
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83 | G4double WV = primaryVertex->GetWeight(); |
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84 | |
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85 | #ifdef G4VERBOSE |
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86 | if(verboseLevel>1) |
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87 | { |
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88 | G4cout << "G4PrimaryTransformer::PrimaryVertex (" |
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89 | << X0 / mm << "(mm)," |
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90 | << Y0 / mm << "(mm)," |
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91 | << Z0 / mm << "(mm)," |
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92 | << T0 / nanosecond << "(nsec))" << G4endl; |
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93 | } |
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94 | #endif |
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95 | |
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96 | G4PrimaryParticle* primaryParticle = primaryVertex->GetPrimary(); |
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97 | while( primaryParticle != 0 ) |
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98 | { |
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99 | GenerateSingleTrack( primaryParticle, X0, Y0, Z0, T0, WV ); |
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100 | primaryParticle = primaryParticle->GetNext(); |
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101 | } |
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102 | } |
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103 | |
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104 | void G4PrimaryTransformer::GenerateSingleTrack |
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105 | (G4PrimaryParticle* primaryParticle, |
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106 | G4double x0,G4double y0,G4double z0,G4double t0,G4double wv) |
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107 | { |
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108 | static G4ParticleDefinition* optPhoton = 0; |
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109 | static G4int nWarn = 0; |
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110 | if(!optPhoton) optPhoton = particleTable->FindParticle("opticalphoton"); |
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111 | |
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112 | G4ParticleDefinition* partDef = GetDefinition(primaryParticle); |
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113 | if(!IsGoodForTrack(partDef)) |
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114 | // The particle cannot be converted to G4Track, check daughters |
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115 | { |
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116 | #ifdef G4VERBOSE |
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117 | if(verboseLevel>2) |
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118 | { |
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119 | G4cout << "Primary particle (PDGcode " << primaryParticle->GetPDGcode() |
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120 | << ") --- Ignored" << G4endl; |
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121 | } |
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122 | #endif |
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123 | G4PrimaryParticle* daughter = primaryParticle->GetDaughter(); |
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124 | while(daughter) |
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125 | { |
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126 | GenerateSingleTrack(daughter,x0,y0,z0,t0,wv); |
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127 | daughter = daughter->GetNext(); |
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128 | } |
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129 | } |
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130 | |
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131 | // The particle is defined in GEANT4 |
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132 | else |
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133 | { |
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134 | // Create G4DynamicParticle object |
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135 | #ifdef G4VERBOSE |
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136 | if(verboseLevel>1) |
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137 | { |
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138 | G4cout << "Primary particle (" << partDef->GetParticleName() |
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139 | << ") --- Transfered with momentum " << primaryParticle->GetMomentum() |
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140 | << G4endl; |
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141 | } |
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142 | #endif |
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143 | G4DynamicParticle* DP = |
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144 | new G4DynamicParticle(partDef,primaryParticle->GetMomentum()); |
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145 | if(partDef==optPhoton && primaryParticle->GetPolarization().mag2()==0.) |
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146 | { |
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147 | if(nWarn<10) |
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148 | { |
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149 | G4Exception("G4PrimaryTransformer::GenerateSingleTrack","ZeroPolarization",JustWarning, |
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150 | "Polarization of the optical photon is null. Random polarization is assumed."); |
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151 | G4cerr << "This warning message is issued up to 10 times." << G4endl; |
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152 | nWarn++; |
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153 | } |
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154 | |
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155 | G4double angle = G4UniformRand() * 360.0*deg; |
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156 | G4ThreeVector normal (1., 0., 0.); |
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157 | G4ThreeVector kphoton = DP->GetMomentumDirection(); |
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158 | G4ThreeVector product = normal.cross(kphoton); |
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159 | G4double modul2 = product*product; |
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160 | |
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161 | G4ThreeVector e_perpend (0., 0., 1.); |
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162 | if (modul2 > 0.) e_perpend = (1./std::sqrt(modul2))*product; |
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163 | G4ThreeVector e_paralle = e_perpend.cross(kphoton); |
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164 | |
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165 | G4ThreeVector polar = std::cos(angle)*e_paralle + std::sin(angle)*e_perpend; |
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166 | DP->SetPolarization(polar.x(),polar.y(),polar.z()); |
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167 | } |
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168 | else |
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169 | { |
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170 | DP->SetPolarization(primaryParticle->GetPolX(), |
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171 | primaryParticle->GetPolY(), |
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172 | primaryParticle->GetPolZ()); |
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173 | } |
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174 | if(primaryParticle->GetProperTime()>0.0) |
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175 | { DP->SetPreAssignedDecayProperTime(primaryParticle->GetProperTime()); } |
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176 | // Set Charge if it is specified |
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177 | if (primaryParticle->GetCharge()<DBL_MAX) { |
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178 | DP->SetCharge(primaryParticle->GetCharge()); |
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179 | } |
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180 | // Set Mass if it is specified |
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181 | G4double pmas = primaryParticle->GetMass(); |
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182 | if(pmas>=0.) |
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183 | { DP->SetMass(pmas); } |
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184 | // Set decay products to the DynamicParticle |
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185 | SetDecayProducts( primaryParticle, DP ); |
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186 | // Set primary particle |
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187 | DP->SetPrimaryParticle(primaryParticle); |
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188 | // Set PDG code if it is different from G4ParticleDefinition |
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189 | if(partDef->GetPDGEncoding()==0 && primaryParticle->GetPDGcode()!=0) |
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190 | { |
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191 | DP->SetPDGcode(primaryParticle->GetPDGcode()); |
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192 | } |
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193 | // Check the particle is properly constructed |
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194 | if(!CheckDynamicParticle(DP)) |
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195 | { |
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196 | delete DP; |
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197 | return; |
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198 | } |
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199 | // Create G4Track object |
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200 | G4Track* track = new G4Track(DP,t0,G4ThreeVector(x0,y0,z0)); |
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201 | // Set trackID and let primary particle know it |
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202 | trackID++; |
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203 | track->SetTrackID(trackID); |
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204 | primaryParticle->SetTrackID(trackID); |
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205 | // Set parentID to 0 as a primary particle |
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206 | track->SetParentID(0); |
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207 | // Set weight ( vertex weight * particle weight ) |
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208 | track->SetWeight(wv*(primaryParticle->GetWeight())); |
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209 | // Store it to G4TrackVector |
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210 | TV.push_back( track ); |
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211 | } |
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212 | } |
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213 | |
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214 | void G4PrimaryTransformer::SetDecayProducts |
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215 | (G4PrimaryParticle* mother, G4DynamicParticle* motherDP) |
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216 | { |
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217 | G4PrimaryParticle* daughter = mother->GetDaughter(); |
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218 | if(!daughter) return; |
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219 | G4DecayProducts* decayProducts = (G4DecayProducts*)(motherDP->GetPreAssignedDecayProducts() ); |
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220 | if(!decayProducts) |
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221 | { |
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222 | decayProducts = new G4DecayProducts(*motherDP); |
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223 | motherDP->SetPreAssignedDecayProducts(decayProducts); |
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224 | } |
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225 | while(daughter) |
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226 | { |
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227 | G4ParticleDefinition* partDef = GetDefinition(daughter); |
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228 | if(!IsGoodForTrack(partDef)) |
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229 | { |
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230 | #ifdef G4VERBOSE |
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231 | if(verboseLevel>2) |
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232 | { |
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233 | G4cout << " >> Decay product (PDGcode " << daughter->GetPDGcode() |
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234 | << ") --- Ignored" << G4endl; |
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235 | } |
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236 | #endif |
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237 | SetDecayProducts(daughter,motherDP); |
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238 | } |
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239 | else |
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240 | { |
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241 | #ifdef G4VERBOSE |
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242 | if(verboseLevel>1) |
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243 | { |
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244 | G4cout << " >> Decay product (" << partDef->GetParticleName() |
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245 | << ") --- Attached with momentum " << daughter->GetMomentum() |
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246 | << G4endl; |
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247 | } |
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248 | #endif |
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249 | G4DynamicParticle*DP |
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250 | = new G4DynamicParticle(partDef,daughter->GetMomentum()); |
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251 | DP->SetPrimaryParticle(daughter); |
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252 | // Decay proper time for daughter |
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253 | if(daughter->GetProperTime()>0.0) |
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254 | { DP->SetPreAssignedDecayProperTime(daughter->GetProperTime()); } |
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255 | // Set Charge is specified |
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256 | if (daughter->GetCharge()<DBL_MAX) { |
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257 | DP->SetCharge(daughter->GetCharge()); |
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258 | } |
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259 | G4double pmas = daughter->GetMass(); |
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260 | if(pmas>=0.) |
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261 | { DP->SetMass(pmas); } |
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262 | decayProducts->PushProducts(DP); |
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263 | SetDecayProducts(daughter,DP); |
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264 | // Check the particle is properly constructed |
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265 | if(!CheckDynamicParticle(DP)) |
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266 | { |
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267 | delete DP; |
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268 | return; |
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269 | } |
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270 | } |
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271 | daughter = daughter->GetNext(); |
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272 | } |
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273 | } |
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274 | |
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275 | void G4PrimaryTransformer::SetUnknnownParticleDefined(G4bool vl) |
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276 | { |
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277 | unknownParticleDefined = vl; |
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278 | if(unknownParticleDefined && !unknown) |
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279 | { G4cerr << "unknownParticleDefined cannot be set true because G4UnknownParticle is not defined in the physics list." |
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280 | << G4endl << "Command ignored." << G4endl; |
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281 | unknownParticleDefined = false; |
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282 | } |
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283 | } |
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284 | |
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285 | G4bool G4PrimaryTransformer::CheckDynamicParticle(G4DynamicParticle*DP) |
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286 | { |
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287 | if(IsGoodForTrack(DP->GetDefinition())) return true; |
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288 | G4DecayProducts* decayProducts = (G4DecayProducts*)(DP->GetPreAssignedDecayProducts()); |
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289 | if(decayProducts && decayProducts->entries()>0) return true; |
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290 | G4cerr << G4endl |
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291 | << "G4PrimaryTransformer: a shortlived primary particle is found" << G4endl |
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292 | << " without any valid decay table nor pre-assigned decay mode." << G4endl; |
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293 | G4Exception("G4PrimaryTransformer","InvalidPrimary",JustWarning, |
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294 | "This primary particle will be ignored."); |
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295 | return false; |
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296 | } |
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297 | |
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298 | G4ParticleDefinition* G4PrimaryTransformer::GetDefinition(G4PrimaryParticle*pp) |
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299 | { |
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300 | G4ParticleDefinition* partDef = pp->GetG4code(); |
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301 | if(!partDef) partDef = particleTable->FindParticle(pp->GetPDGcode()); |
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302 | if(unknownParticleDefined && ((!partDef)||partDef->IsShortLived())) partDef = unknown; |
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303 | return partDef; |
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304 | } |
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305 | |
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306 | G4bool G4PrimaryTransformer::IsGoodForTrack(G4ParticleDefinition* pd) |
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307 | { |
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308 | if(!pd) |
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309 | { return false; } |
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310 | else if(!(pd->IsShortLived())) |
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311 | { return true; } |
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312 | // Following two lines should be removed if the user does not want to make shortlived |
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313 | // primary particle with proper decay table to be converted into a track. |
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314 | else if(pd->GetDecayTable()) |
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315 | { return true; } |
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316 | return false; |
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317 | } |
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318 | |
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