fanoCavity2/src/PrimaryGeneratorAction.cc

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0026 /// \file medical/fanoCavity2/src/PrimaryGeneratorAction.cc
0027 /// \brief Implementation of the PrimaryGeneratorAction class
0028 //
0029 //
0030 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0031 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0032
0033 #include "PrimaryGeneratorAction.hh"
0034
0035 #include "DetectorConstruction.hh"
0036 #include "HistoManager.hh"
0037
0038 #include "G4Event.hh"
0039 #include "G4ParticleDefinition.hh"
0040 #include "G4ParticleGun.hh"
0041 #include "G4ParticleTable.hh"
0042 #include "G4SystemOfUnits.hh"
0043 #include "Randomize.hh"
0044
0045 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0046
0047 PrimaryGeneratorAction::PrimaryGeneratorAction(DetectorConstruction* det)
0048   : fParticleGun(0), fDetector(det)
0049 {
0050   fParticleGun = new G4ParticleGun(1);
0051   G4ParticleDefinition* particle = G4ParticleTable::GetParticleTable()->FindParticle("e-");
0052   fParticleGun->SetParticleDefinition(particle);
0053   fParticleGun->SetParticleEnergy(1 * MeV);
0054   fParticleGun->SetParticleMomentumDirection(G4ThreeVector(0., 0., 1.));
0055 }
0056
0057 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0058
0059 PrimaryGeneratorAction::~PrimaryGeneratorAction()
0060 {
0061   delete fParticleGun;
0062 }
0063
0064 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0065
0066 void PrimaryGeneratorAction::RunInitialisation(G4double effWall, G4double massR)
0067 {
0068   // this function is called at beginning of run
0069
0070   fCavityThickness = fDetector->GetCavityThickness();
0071   fEffWallThick = effWall;
0072   fMassWallRatio = massR;
0073
0074   fNwall = fNcavity = 0;
0075 }
0076
0077 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0078
0079 void PrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent)
0080 {
0081   // this function is called at the begining of event
0082   //
0083   G4double Zvertex;
0084   if (G4UniformRand() < fMassWallRatio) {
0085     Zvertex = 0.5 * fCavityThickness + G4UniformRand() * fEffWallThick;
0086     if (G4UniformRand() < 0.5) Zvertex = -Zvertex;
0087     fNwall++;
0088   }
0089   else {
0090     Zvertex = (G4UniformRand() - 0.5) * fCavityThickness;
0091     fNcavity++;
0092   }
0093
0094   fParticleGun->SetParticlePosition(G4ThreeVector(0., 0., Zvertex));
0095   fParticleGun->GeneratePrimaryVertex(anEvent);
0096
0097   // histograms
0098   //
0099   G4AnalysisManager* analysisManager = G4AnalysisManager::Instance();
0100   analysisManager->FillH1(1, Zvertex);
0101   analysisManager->FillH1(2, fParticleGun->GetParticleEnergy());
0102 }
0103
0104 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......