Geant4 Cross Reference

Cross-Referencing   Geant4
Geant4/examples/advanced/eRosita/application/src/eRositaPrimaryGeneratorAction.cc

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  1 //
  2 // ********************************************************************
  3 // * License and Disclaimer                                           *
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 25 //
 26 
 27 #include "eRositaActionInitialization.hh"
 28 #include "eRositaDetectorConstruction.hh"
 29 #include "eRositaPrimaryGeneratorAction.hh"
 30 
 31 #include "globals.hh"
 32 #include "G4SystemOfUnits.hh"
 33 #include "G4Event.hh"
 34 #include "G4ParticleGun.hh"
 35 #include "G4ParticleTable.hh"
 36 #include "G4ParticleDefinition.hh"
 37 
 38 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
 39 
 40 eRositaPrimaryGeneratorAction::eRositaPrimaryGeneratorAction()
 41 {
 42     constexpr auto NUMBER_OF_PARTICLES{1};
 43     particleGun = new G4ParticleGun(NUMBER_OF_PARTICLES);
 44 
 45     // default particle
 46     auto *particleTable = G4ParticleTable::GetParticleTable();
 47     auto *particle = particleTable->FindParticle("proton");
 48 
 49     constexpr auto PARTICLE_ENERGY{100.0 * MeV};
 50     particleGun->SetParticleDefinition(particle);
 51     particleGun->SetParticleMomentumDirection(G4ThreeVector(momentumDirectionX, momentumDirectionY, momentumDirectionZ));
 52     particleGun->SetParticleEnergy(PARTICLE_ENERGY);
 53 }
 54 
 55 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
 56 
 57 eRositaPrimaryGeneratorAction::~eRositaPrimaryGeneratorAction()
 58 {
 59     delete particleGun;
 60 }
 61 
 62 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
 63 
 64 void eRositaPrimaryGeneratorAction::GeneratePrimaries(G4Event* event)
 65 {
 66     constexpr auto INITIAL_POSITION_X{0.0 * cm};
 67     constexpr auto INITIAL_POSITION_Y{2.25 * cm};
 68     constexpr auto INITIAL_POSITION_Z{4.0 * cm};
 69     
 70     positionX = INITIAL_POSITION_X;
 71     positionY = INITIAL_POSITION_Y;
 72     positionZ = INITIAL_POSITION_Z;
 73 
 74     particleGun->SetParticlePosition(G4ThreeVector(positionX, positionY, positionZ));
 75     particleGun->GeneratePrimaryVertex(event);
 76 }
 77