field01/src/F01PrimaryGeneratorAction.cc

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0025 //
0026 /// \file F01PrimaryGeneratorAction.cc
0027 /// \brief Implementation of the F01PrimaryGeneratorAction class
0028
0029 #include "F01PrimaryGeneratorAction.hh"
0030
0031 #include "F01DetectorConstruction.hh"
0032 #include "F01PrimaryGeneratorMessenger.hh"
0033
0034 #include "G4Event.hh"
0035 #include "G4ParticleDefinition.hh"
0036 #include "G4ParticleGun.hh"
0037 #include "G4ParticleTable.hh"
0038 #include "G4PhysicalConstants.hh"
0039 #include "G4SystemOfUnits.hh"
0040 #include "Randomize.hh"
0041
0042 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0043
0044 G4ParticleDefinition* F01PrimaryGeneratorAction::fgPrimaryParticle = nullptr;
0045
0046 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0047
0048 F01PrimaryGeneratorAction::F01PrimaryGeneratorAction(F01DetectorConstruction* det) : fDetector(det)
0049 {
0050   G4int n_particle = 1;
0051   fParticleGun = new G4ParticleGun(n_particle);
0052
0053   // create a messenger for this class
0054   fGunMessenger = new F01PrimaryGeneratorMessenger(this);
0055
0056   // default particle kinematic
0057
0058   G4ParticleTable* particleTable = G4ParticleTable::GetParticleTable();
0059   G4String particleName;
0060   G4ParticleDefinition* particle = particleTable->FindParticle(particleName = "e-");
0061   fParticleGun->SetParticleDefinition(particle);
0062
0063   fgPrimaryParticle = particle;
0064
0065   fParticleGun->SetParticleMomentumDirection(G4ThreeVector(0., 0., -1.));
0066   fParticleGun->SetParticleEnergy(0.5 * GeV);
0067
0068   fZVertex = fDetector->GetAbsorberZpos() - 0.5 * (fDetector->GetAbsorberThickness());
0069   fParticleGun->SetParticlePosition(G4ThreeVector(fXVertex, fYVertex, fZVertex));
0070 }
0071
0072 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0073
0074 F01PrimaryGeneratorAction::~F01PrimaryGeneratorAction()
0075 {
0076   delete fParticleGun;
0077   delete fGunMessenger;
0078 }
0079
0080 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0081
0082 void F01PrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent)
0083 {
0084   // this function is called at the begining of event
0085   //
0086   fgPrimaryParticle = fParticleGun->GetParticleDefinition();
0087
0088   G4double x0, y0, z0;
0089   if (fVertexDefined) {
0090     x0 = fXVertex;
0091     y0 = fYVertex;
0092     z0 = fZVertex;
0093   }
0094   else {
0095     x0 = 0.;
0096     y0 = 0.;
0097     z0 = fDetector->GetAbsorberZpos() - 0.5 * (fDetector->GetAbsorberThickness());
0098   }
0099
0100   G4double r0, phi0;
0101   if (fRndmFlag == "on") {
0102     r0 = (fDetector->GetAbsorberRadius()) * std::sqrt(G4UniformRand());
0103     phi0 = twopi * G4UniformRand();
0104     x0 = r0 * std::cos(phi0);
0105     y0 = r0 * std::sin(phi0);
0106   }
0107
0108   fParticleGun->SetParticlePosition(G4ThreeVector(x0, y0, z0));
0109   fParticleGun->GeneratePrimaryVertex(anEvent);
0110 }
0111
0112 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0113
0114 G4String F01PrimaryGeneratorAction::GetPrimaryName()
0115 {
0116   return fgPrimaryParticle->GetParticleName();
0117 }
0118
0119 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0120
0121 void F01PrimaryGeneratorAction::SetZVertex(G4double z)
0122 {
0123   fVertexDefined = true;
0124   fZVertex = z;
0125   G4cout << " Z coordinate of the primary vertex = " << fZVertex / mm << " mm." << G4endl;
0126 }
0127
0128 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0129
0130 void F01PrimaryGeneratorAction::SetXVertex(G4double x)
0131 {
0132   fVertexDefined = true;
0133   fXVertex = x;
0134   G4cout << " X coordinate of the primary vertex = " << fXVertex / mm << " mm." << G4endl;
0135 }
0136
0137 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0138
0139 void F01PrimaryGeneratorAction::SetYVertex(G4double y)
0140 {
0141   fVertexDefined = true;
0142   fYVertex = y;
0143   G4cout << " Y coordinate of the primary vertex = " << fYVertex / mm << " mm." << G4endl;
0144 }
0145
0146 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......