1 | // %%%%%%%%%% |
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2 | // G4 headers |
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3 | // %%%%%%%%%% |
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4 | #include "G4Event.hh" |
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5 | #include "G4ParticleGun.hh" |
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6 | #include "G4ParticleTable.hh" |
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7 | #include "G4ParticleDefinition.hh" |
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8 | #include "Randomize.hh" |
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9 | #include "G4UnitsTable.hh" |
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10 | |
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11 | // %%%%%%%%%%%%% |
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12 | // gemc headers |
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13 | // %%%%%%%%%%%%% |
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14 | #include "MPrimaryGeneratorAction.h" |
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15 | #include "detector.h" |
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16 | |
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17 | // %%%%%%%%%%% |
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18 | // C++ headers |
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19 | // %%%%%%%%%%% |
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20 | #include <iostream> |
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21 | using namespace std; |
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22 | |
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23 | MPrimaryGeneratorAction::MPrimaryGeneratorAction(gemc_opts opts) |
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24 | { |
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25 | gemcOpt = opts; |
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26 | hd_msg = gemcOpt.args["LOG_MSG"].args + " Beam Settings >> " ; |
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27 | input_gen = gemcOpt.args["INPUT_GEN_FILE"].args; |
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28 | GEN_VERBOSITY = gemcOpt.args["GEN_VERBOSITY"].arg; |
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29 | |
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30 | particleTable = G4ParticleTable::GetParticleTable(); |
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31 | |
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32 | setBeam(gemcOpt); |
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33 | |
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34 | particleGun = new G4ParticleGun(1); |
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35 | |
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36 | if(input_gen == "gemc_internal") |
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37 | { |
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38 | cout << endl << hd_msg << " Beam Type: " << Particle->GetParticleName() << endl; |
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39 | cout << hd_msg << " Beam Momentum: " << G4BestUnit(mom, "Energy") ; |
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40 | if(dmom > 0) cout << " +- " << G4BestUnit(dmom, "Energy") ; |
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41 | cout << endl; |
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42 | cout << hd_msg << " Beam Direction: (theta, phi) = (" << theta/deg << ", " << phi/deg << ")" ; |
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43 | if(dtheta > 0 || dphi > 0) cout << " +- (" << dtheta/deg << ", " << dphi/deg << ")" ; |
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44 | cout << " deg " << endl; |
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45 | cout << hd_msg << " Beam Vertex: (" << vx/cm << ", " << vy/cm << ", " << vz/cm << ")" ; |
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46 | if(dvx + dvy + dvz > 0) cout << " +- (" << dvx/cm << ", " << dvy/cm << ", " << dvz/cm << ")" ; |
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47 | cout << " cm " << endl; |
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48 | } |
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49 | |
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50 | |
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51 | if(NP>0) |
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52 | { |
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53 | cout << endl << hd_msg << " Luminosity Particle Type: " << L_Particle->GetParticleName() << endl; |
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54 | cout << hd_msg << " Luminosity Particle Momentum: " << G4BestUnit(L_Mom, "Energy") ; |
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55 | cout << endl; |
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56 | cout << hd_msg << " Luminosity Particle Direction: (theta, phi) = (" << L_Theta/deg << ", " << L_Phi/deg << ")" ; |
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57 | cout << " deg " << endl; |
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58 | cout << hd_msg << " Luminosity Particle Vertex: (" << L_vx/cm << ", " << L_vy/cm << ", " << L_vz/cm << ") cm" << endl; |
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59 | cout << hd_msg << " Number of Luminosity Particles: " << NP << endl; |
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60 | cout << hd_msg << " Luminosity Time Window: " << TWINDOW/ns << " nanoseconds." << endl ; |
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61 | cout << hd_msg << " Luminosity Time Between Bunches: " << TBUNCH/ns << " nanoseconds." << endl; |
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62 | } |
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63 | |
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64 | } |
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65 | |
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66 | |
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67 | void MPrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent) |
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68 | { |
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69 | // internal generator. Particle defined by command line |
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70 | if(input_gen == "gemc_internal") |
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71 | { |
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72 | // Primary Particle |
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73 | particleGun->SetParticleDefinition(Particle); |
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74 | |
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75 | // 4-momenta |
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76 | Mom = mom/MeV + (2.0*G4UniformRand()-1.0)*dmom/MeV; |
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77 | Theta = theta/rad + (2.0*G4UniformRand()-1.0)*dtheta/rad; |
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78 | Phi = phi/rad + (2.0*G4UniformRand()-1.0)*dphi/rad; |
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79 | double mass = Particle->GetPDGMass(); |
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80 | double akine = sqrt(Mom*Mom + mass*mass) - mass ; |
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81 | beam_dir = G4ThreeVector(cos(Phi/rad)*sin(Theta/rad), sin(Phi/rad)*sin(Theta/rad), cos(Theta/rad)); |
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82 | particleGun->SetParticleEnergy(akine); |
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83 | particleGun->SetParticleMomentumDirection(beam_dir); |
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84 | |
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85 | // vertex |
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86 | Vx = vx/mm + (2.0*G4UniformRand()-1.0)*dvx/mm; |
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87 | Vy = vy/mm + (2.0*G4UniformRand()-1.0)*dvy/mm; |
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88 | Vz = vz/mm + (2.0*G4UniformRand()-1.0)*dvz/mm; |
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89 | beam_vrt = G4ThreeVector(Vx, Vy, Vz); |
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90 | particleGun->SetParticlePosition(beam_vrt); |
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91 | |
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92 | // Primary particle generated int the middle of Time window |
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93 | particleGun->SetParticleTime(TWINDOW/2); |
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94 | particleGun->GeneratePrimaryVertex(anEvent); |
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95 | } |
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96 | else |
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97 | // external generator: input file |
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98 | { |
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99 | // LUND format |
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100 | if(gformat == "LUND" && !gif.eof()) |
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101 | { |
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102 | double tmp, px, py, pz; |
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103 | int NPART, pdef; |
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104 | gif >> NPART >> tmp >> tmp >> tmp >> tmp >> tmp >> tmp >> tmp >> tmp >> tmp; |
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105 | for(int p=0; p<NPART; p++) |
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106 | { |
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107 | gif >> tmp >> tmp >> tmp >> pdef >> tmp >> tmp >> px >> py >> pz >> tmp >> tmp >> Vx >> Vy >> Vz; |
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108 | |
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109 | // Primary Particle |
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110 | Particle = particleTable->FindParticle(pdef); |
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111 | particleGun->SetParticleDefinition(Particle); |
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112 | |
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113 | // 4-momenta |
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114 | G4ThreeVector pmom(px*GeV, py*GeV, pz*GeV); |
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115 | Mom = pmom.mag(); |
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116 | Phi = pmom.getPhi(); |
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117 | Theta = pmom.getTheta(); |
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118 | double mass = Particle->GetPDGMass(); |
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119 | double akine = sqrt(Mom*Mom + mass*mass) - mass ; |
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120 | |
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121 | beam_dir = G4ThreeVector(cos(Phi/rad)*sin(Theta/rad), sin(Phi/rad)*sin(Theta/rad), cos(Theta/rad)); |
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122 | particleGun->SetParticleEnergy(akine); |
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123 | particleGun->SetParticleMomentumDirection(beam_dir); |
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124 | |
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125 | // vertex |
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126 | beam_vrt = G4ThreeVector(Vx*cm, Vy*cm, Vz*cm); |
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127 | particleGun->SetParticlePosition(beam_vrt); |
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128 | |
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129 | // Primary particle generated int the middle of Time window |
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130 | particleGun->SetParticleTime(TWINDOW/2); |
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131 | particleGun->GeneratePrimaryVertex(anEvent); |
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132 | if(GEN_VERBOSITY > 3) |
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133 | cout << hd_msg << " Particle Number: " << p << ", id=" << pdef |
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134 | << " Vertex=" << beam_vrt << "cm, momentum=" << pmom/GeV << " GeV" << endl; |
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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 | |
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141 | // Luminosity Particles |
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142 | int NBUNCHES = (int) floor(TWINDOW/TBUNCH); |
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143 | int PBUNCH = (int) floor((double)NP/NBUNCHES); |
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144 | |
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145 | particleGun->SetParticleDefinition(L_Particle); |
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146 | particleGun->SetParticlePosition(L_beam_vrt); |
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147 | double L_mass = L_Particle->GetPDGMass(); |
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148 | double L_akine = sqrt(L_Mom*L_Mom + L_mass*L_mass) - L_mass ; |
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149 | |
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150 | particleGun->SetParticleEnergy(L_akine); |
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151 | particleGun->SetParticleMomentumDirection(L_beam_dir); |
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152 | for(int b=0; b<NBUNCHES; b++) |
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153 | { |
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154 | for(int p=0; p<PBUNCH; p++) |
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155 | { |
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156 | particleGun-> SetParticleTime(TBUNCH*b); |
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157 | particleGun->GeneratePrimaryVertex(anEvent); |
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158 | } |
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159 | } |
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160 | |
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161 | } |
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162 | |
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163 | |
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164 | |
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165 | void MPrimaryGeneratorAction::setBeam(gemc_opts) |
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166 | { |
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167 | string hd_msg = gemcOpt.args["LOG_MSG"].args + " Beam Settings >> " ; |
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168 | |
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169 | if(input_gen == "gemc_internal") |
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170 | { |
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171 | |
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172 | // %%%%%%%%%%%% |
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173 | // Primary Beam |
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174 | // %%%%%%%%%%%% |
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175 | string beam = gemcOpt.args["BEAM_P"].args; |
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176 | string vert = gemcOpt.args["BEAM_V"].args; |
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177 | string spread_b = gemcOpt.args["SPREAD_P"].args; |
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178 | string spread_v = gemcOpt.args["SPREAD_V"].args; |
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179 | |
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180 | string blockstr; |
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181 | int ppos = beam.find(","); |
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182 | blockstr.assign(beam, 0, ppos); |
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183 | |
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184 | Particle = particleTable->FindParticle(blockstr); |
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185 | |
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186 | if(!Particle) |
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187 | { |
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188 | if(blockstr == "show_all") |
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189 | { |
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190 | for(int i=0; i<particleTable->entries(); i++) |
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191 | cout << hd_msg << " g4 particle: " << particleTable->GetParticleName(i) << endl;; |
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192 | } |
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193 | else |
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194 | cout << hd_msg << " Particle " << blockstr << " not found in G4 table. Exiting" << endl << endl; |
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195 | |
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196 | exit(0); |
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197 | } |
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198 | |
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199 | // %%%%%%%% |
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200 | // Momentum |
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201 | // %%%%%%%% |
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202 | // energy |
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203 | beam.assign(beam, ppos+1, beam.size()); |
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204 | ppos = beam.find(","); |
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205 | blockstr.assign(beam, 0, ppos); |
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206 | mom = get_number(blockstr); |
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207 | // theta angle |
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208 | beam.assign(beam, ppos+1, beam.size()); |
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209 | ppos = beam.find(","); |
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210 | blockstr.assign(beam, 0, ppos); |
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211 | theta = get_number(blockstr); |
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212 | // phi angle |
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213 | beam.assign(beam, ppos+1, beam.size()); |
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214 | ppos = beam.find("\""); |
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215 | blockstr.assign(beam, 0, ppos); |
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216 | phi = get_number(blockstr); |
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217 | |
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218 | // %%%%%% |
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219 | // Spread |
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220 | // %%%%%% |
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221 | // delta energy |
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222 | ppos = spread_b.find(","); |
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223 | blockstr.assign(spread_b, 0, ppos); |
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224 | dmom = get_number(blockstr); |
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225 | // delta theta angle |
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226 | spread_b.assign(spread_b, ppos+1, spread_b.size()); |
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227 | ppos = spread_b.find(","); |
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228 | blockstr.assign(spread_b, 0, ppos); |
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229 | dtheta = get_number(blockstr); |
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230 | // delta phi angle |
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231 | spread_b.assign(spread_b, ppos+1, spread_b.size()); |
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232 | ppos = spread_b.find(","); |
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233 | blockstr.assign(spread_b, 0, ppos); |
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234 | dphi = get_number(blockstr); |
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235 | |
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236 | |
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237 | // %%%%%% |
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238 | // Vertex |
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239 | // %%%%%% |
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240 | // units |
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241 | ppos = vert.find(")"); |
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242 | string units; |
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243 | units.assign(vert, ppos+1, vert.size() - ppos); |
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244 | // vx |
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245 | ppos = vert.find("("); |
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246 | vert.assign(vert, ppos+1, vert.size()); |
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247 | ppos = vert.find(","); |
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248 | blockstr.assign(vert, 0, ppos); |
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249 | vx = get_number(blockstr + "*" + units); |
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250 | // vy |
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251 | ppos = vert.find(","); |
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252 | vert.assign(vert, ppos+1, vert.size()); |
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253 | ppos = vert.find(","); |
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254 | blockstr.assign(vert, 0, ppos); |
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255 | vy = get_number(blockstr + "*" + units); |
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256 | // vz |
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257 | ppos = vert.find(","); |
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258 | vert.assign(vert, ppos+1, vert.size()); |
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259 | ppos = vert.find(","); |
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260 | blockstr.assign(vert, 0, ppos); |
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261 | vz = get_number(blockstr + "*" + units); |
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262 | |
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263 | |
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264 | // %%%%%%%%%%%%%%%%%%%%%%%%% |
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265 | // Vertex Spread (cartesian) |
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266 | // %%%%%%%%%%%%%%%%%%%%%%%%% |
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267 | // units |
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268 | ppos = spread_v.find(")"); |
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269 | units.assign(spread_v, ppos+1, spread_v.size() - ppos); |
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270 | // dvx |
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271 | ppos = spread_v.find("("); |
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272 | spread_v.assign(spread_v, ppos+1, spread_v.size()); |
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273 | ppos = spread_v.find(","); |
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274 | blockstr.assign(spread_v, 0, ppos); |
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275 | dvx = get_number(blockstr + "*" + units); |
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276 | // dvy |
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277 | ppos = spread_v.find(","); |
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278 | spread_v.assign(spread_v, ppos+1, spread_v.size()); |
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279 | ppos = spread_v.find(","); |
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280 | blockstr.assign(spread_v, 0, ppos); |
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281 | dvy = get_number(blockstr + "*" + units); |
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282 | // dvz |
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283 | ppos = spread_v.find(","); |
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284 | spread_v.assign(spread_v, ppos+1, spread_v.size()); |
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285 | ppos = spread_v.find(","); |
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286 | blockstr.assign(spread_v, 0, ppos); |
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287 | dvz = get_number(blockstr + "*" + units); |
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288 | } |
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289 | else |
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290 | { |
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291 | gformat.assign( input_gen, 0, input_gen.find(",")) ; |
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292 | gfilename.assign(input_gen, input_gen.find(",") + 1, input_gen.size()) ; |
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293 | cout << hd_msg << " Opening " << gformat << " file: " << TrimSpaces(gfilename).c_str() << endl; |
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294 | gif.open(TrimSpaces(gfilename).c_str()); |
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295 | |
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296 | |
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297 | if(!gif) |
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298 | { |
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299 | cerr << hd_msg << " Can't open output file " << TrimSpaces(gfilename).c_str() << ". Exiting. " << endl; |
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300 | exit(1); |
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301 | } |
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302 | } |
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303 | |
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304 | |
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305 | // %%%%%%%%%%%%%%% |
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306 | // Luminosity Beam |
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307 | // %%%%%%%%%%%%%%% |
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308 | string L_beam = gemcOpt.args["LUMI_P"].args; |
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309 | string L_vert = gemcOpt.args["LUMI_V"].args; |
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310 | |
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311 | string L_blockstr; |
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312 | int L_ppos = L_beam.find(","); |
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313 | L_blockstr.assign(L_beam, 0, L_ppos); |
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314 | |
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315 | L_Particle = particleTable->FindParticle(L_blockstr); |
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316 | |
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317 | if(!L_Particle) |
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318 | { |
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319 | if(L_blockstr == "show_all") |
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320 | { |
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321 | for(int i=0; i<particleTable->entries(); i++) |
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322 | cout << hd_msg << " g4 particle: " << particleTable->GetParticleName(i) << endl; |
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323 | } |
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324 | else |
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325 | cout << hd_msg << " Particle " << L_blockstr << " not found in G4 table. Exiting" << endl << endl; |
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326 | |
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327 | exit(0); |
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328 | } |
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329 | |
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330 | // %%%%%%%%%%%%%%%%%%% |
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331 | // Luminosity Momentum |
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332 | // %%%%%%%%%%%%%%%%%%% |
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333 | // energy |
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334 | L_beam.assign(L_beam, L_ppos+1, L_beam.size()); |
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335 | L_ppos = L_beam.find(","); |
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336 | L_blockstr.assign(L_beam, 0, L_ppos); |
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337 | L_Mom = get_number(L_blockstr); |
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338 | // theta angle |
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339 | L_beam.assign(L_beam, L_ppos+1, L_beam.size()); |
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340 | L_ppos = L_beam.find(","); |
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341 | L_blockstr.assign(L_beam, 0, L_ppos); |
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342 | L_Theta = get_number(L_blockstr); |
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343 | // phi angle |
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344 | L_beam.assign(L_beam, L_ppos+1, L_beam.size()); |
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345 | L_ppos = L_beam.find("\""); |
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346 | L_blockstr.assign(L_beam, 0, L_ppos); |
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347 | L_Phi = get_number(L_blockstr); |
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348 | |
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349 | L_beam_dir = G4ThreeVector(cos(L_Phi/rad)*sin(L_Theta/rad), sin(L_Phi/rad)*sin(L_Theta/rad), cos(L_Theta/rad)); |
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350 | |
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351 | // %%%%%%%%%%%%%%%%% |
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352 | // Luminosity Vertex |
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353 | // %%%%%%%%%%%%%%%%% |
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354 | // units |
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355 | L_ppos = L_vert.find(")"); |
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356 | string L_units; |
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357 | L_units.assign(L_vert, L_ppos+1, L_vert.size() - L_ppos); |
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358 | // vx |
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359 | L_ppos = L_vert.find("("); |
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360 | L_vert.assign(L_vert, L_ppos+1, L_vert.size()); |
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361 | L_ppos = L_vert.find(","); |
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362 | L_blockstr.assign(L_vert, 0, L_ppos); |
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363 | L_vx = get_number(L_blockstr + "*" + L_units); |
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364 | // vy |
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365 | L_ppos = L_vert.find(","); |
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366 | L_vert.assign(L_vert, L_ppos+1, L_vert.size()); |
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367 | L_ppos = L_vert.find(","); |
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368 | L_blockstr.assign(L_vert, 0, L_ppos); |
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369 | L_vy = get_number(L_blockstr + "*" + L_units); |
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370 | // vz |
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371 | L_ppos = L_vert.find(","); |
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372 | L_vert.assign(L_vert, L_ppos+1, L_vert.size()); |
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373 | L_ppos = L_vert.find(","); |
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374 | L_blockstr.assign(L_vert, 0, L_ppos); |
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375 | L_vz = get_number(L_blockstr + "*" + L_units); |
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376 | |
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377 | L_beam_vrt = G4ThreeVector(L_vx, L_vy, L_vz); |
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378 | |
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379 | // %%%%%%%%%%%%%%%%%%%%% |
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380 | // Luminosity Parameters |
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381 | // %%%%%%%%%%%%%%%%%%%%% |
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382 | string L_pars = gemcOpt.args["LUMI_EVENT"].args; |
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383 | // NP |
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384 | L_ppos = L_pars.find(","); |
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385 | L_blockstr.assign(L_pars, 0, L_ppos); |
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386 | NP = atoi(L_blockstr.c_str()); |
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387 | // TWINDOW |
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388 | L_ppos = L_pars.find(","); |
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389 | L_pars.assign(L_pars, L_ppos+1, L_pars.size()); |
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390 | L_ppos = L_pars.find(","); |
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391 | L_blockstr.assign(L_pars, 0, L_ppos); |
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392 | TWINDOW = get_number(L_blockstr); |
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393 | // TBUNCH |
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394 | L_ppos = L_pars.find(","); |
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395 | L_pars.assign(L_pars, L_ppos+1, L_pars.size()); |
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396 | L_ppos = L_pars.find(","); |
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397 | L_blockstr.assign(L_pars, 0, L_ppos-1); |
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398 | TBUNCH = get_number(L_blockstr); |
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399 | |
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400 | } |
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401 | |
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402 | |
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403 | MPrimaryGeneratorAction::~MPrimaryGeneratorAction() |
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404 | { |
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405 | delete particleGun; |
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406 | gif.close(); |
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407 | } |
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408 | |
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409 | |
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410 | |
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411 | |
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412 | |
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413 | |
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414 | |
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415 | |
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416 | |
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417 | |
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