field02/src/F02PrimaryGeneratorAction.cc

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0025 //
0026 /// \file field/field02/src/F02PrimaryGeneratorAction.cc
0027 /// \brief Implementation of the F02PrimaryGeneratorAction class
0028 //
0029 //
0030 //
0031 //
0032 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0033 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0034
0035 #include "F02PrimaryGeneratorAction.hh"
0036
0037 #include "F02DetectorConstruction.hh"
0038 #include "F02PrimaryGeneratorMessenger.hh"
0039
0040 #include "G4Event.hh"
0041 #include "G4ParticleDefinition.hh"
0042 #include "G4ParticleGun.hh"
0043 #include "G4ParticleTable.hh"
0044 #include "G4PhysicalConstants.hh"
0045 #include "G4SystemOfUnits.hh"
0046 #include "Randomize.hh"
0047
0048 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0049
0050 G4ParticleDefinition* F02PrimaryGeneratorAction::fgPrimaryParticle = nullptr;
0051
0052 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0053
0054 F02PrimaryGeneratorAction::F02PrimaryGeneratorAction(F02DetectorConstruction* det) : fDetector(det)
0055 {
0056   G4int n_particle = 1;
0057   fParticleGun = new G4ParticleGun(n_particle);
0058
0059   // create a messenger for this class
0060   fGunMessenger = new F02PrimaryGeneratorMessenger(this);
0061
0062   // default particle kinematic
0063
0064   G4ParticleTable* particleTable = G4ParticleTable::GetParticleTable();
0065   G4String particleName;
0066   G4ParticleDefinition* particle = particleTable->FindParticle(particleName = "proton");
0067   fParticleGun->SetParticleDefinition(particle);
0068
0069   fgPrimaryParticle = particle;
0070
0071   fParticleGun->SetParticleMomentumDirection(G4ThreeVector(0., 0., 1.));
0072   fParticleGun->SetParticleEnergy(100. * GeV);
0073
0074   fZVertex = 0.;  //  -0.5*(fDetector->GetAbsorberThickness());
0075   fParticleGun->SetParticlePosition(G4ThreeVector(fXVertex, fYVertex, fZVertex));
0076 }
0077
0078 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0079
0080 F02PrimaryGeneratorAction::~F02PrimaryGeneratorAction()
0081 {
0082   delete fParticleGun;
0083   delete fGunMessenger;
0084 }
0085
0086 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0087
0088 void F02PrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent)
0089 {
0090   // this function is called at the begining of event
0091   //
0092   fgPrimaryParticle = fParticleGun->GetParticleDefinition();
0093
0094   G4double x0, y0, z0;
0095   if (fVertexDefined) {
0096     x0 = fXVertex;
0097     y0 = fYVertex;
0098     z0 = fZVertex;
0099   }
0100   else {
0101     x0 = 0.;
0102     y0 = 0.;
0103     z0 = 0.;  // -0.5*(fDetector->GetWorldSizeZ());
0104   }
0105
0106   G4double r0, phi0;
0107   if (fRndmFlag == "on") {
0108     r0 = (fDetector->GetAbsorberRadius()) * std::sqrt(G4UniformRand());
0109     phi0 = twopi * G4UniformRand();
0110     x0 = r0 * std::cos(phi0);
0111     y0 = r0 * std::sin(phi0);
0112   }
0113
0114   fParticleGun->SetParticlePosition(G4ThreeVector(x0, y0, z0));
0115   fParticleGun->GeneratePrimaryVertex(anEvent);
0116 }
0117
0118 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0119
0120 G4String F02PrimaryGeneratorAction::GetPrimaryName()
0121 {
0122   return fgPrimaryParticle->GetParticleName();
0123 }
0124
0125 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0126
0127 void F02PrimaryGeneratorAction::SetXVertex(G4double x)
0128 {
0129   fVertexDefined = true;
0130   fXVertex = x;
0131   G4cout << " X coordinate of the primary vertex = " << fXVertex / mm << " mm." << G4endl;
0132 }
0133
0134 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0135
0136 void F02PrimaryGeneratorAction::SetYVertex(G4double y)
0137 {
0138   fVertexDefined = true;
0139   fYVertex = y;
0140   G4cout << " Y coordinate of the primary vertex = " << fYVertex / mm << " mm." << G4endl;
0141 }
0142
0143 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0144
0145 void F02PrimaryGeneratorAction::SetZVertex(G4double z)
0146 {
0147   fVertexDefined = true;
0148   fZVertex = z;
0149   G4cout << " Z coordinate of the primary vertex = " << fZVertex / mm << " mm." << G4endl;
0150 }
0151
0152 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......