fanoCavity2/src/PrimaryGeneratorAction.cc

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0025 //
0026 /// \file PrimaryGeneratorAction.cc
0027 /// \brief Implementation of the PrimaryGeneratorAction class
0028
0029 #include "PrimaryGeneratorAction.hh"
0030
0031 #include "DetectorConstruction.hh"
0032 #include "HistoManager.hh"
0033
0034 #include "G4Event.hh"
0035 #include "G4ParticleDefinition.hh"
0036 #include "G4ParticleGun.hh"
0037 #include "G4ParticleTable.hh"
0038 #include "G4SystemOfUnits.hh"
0039 #include "Randomize.hh"
0040
0041 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0042
0043 PrimaryGeneratorAction::PrimaryGeneratorAction(DetectorConstruction* det)
0044   : fParticleGun(0), fDetector(det)
0045 {
0046   fParticleGun = new G4ParticleGun(1);
0047   G4ParticleDefinition* particle = G4ParticleTable::GetParticleTable()->FindParticle("e-");
0048   fParticleGun->SetParticleDefinition(particle);
0049   fParticleGun->SetParticleEnergy(1 * MeV);
0050   fParticleGun->SetParticleMomentumDirection(G4ThreeVector(0., 0., 1.));
0051 }
0052
0053 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0054
0055 PrimaryGeneratorAction::~PrimaryGeneratorAction()
0056 {
0057   delete fParticleGun;
0058 }
0059
0060 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0061
0062 void PrimaryGeneratorAction::RunInitialisation(G4double effWall, G4double massR)
0063 {
0064   // this function is called at beginning of run
0065
0066   fCavityThickness = fDetector->GetCavityThickness();
0067   fEffWallThick = effWall;
0068   fMassWallRatio = massR;
0069
0070   fNwall = fNcavity = 0;
0071 }
0072
0073 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0074
0075 void PrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent)
0076 {
0077   // this function is called at the begining of event
0078   //
0079   G4double Zvertex;
0080   if (G4UniformRand() < fMassWallRatio) {
0081     Zvertex = 0.5 * fCavityThickness + G4UniformRand() * fEffWallThick;
0082     if (G4UniformRand() < 0.5) Zvertex = -Zvertex;
0083     fNwall++;
0084   }
0085   else {
0086     Zvertex = (G4UniformRand() - 0.5) * fCavityThickness;
0087     fNcavity++;
0088   }
0089
0090   fParticleGun->SetParticlePosition(G4ThreeVector(0., 0., Zvertex));
0091   fParticleGun->GeneratePrimaryVertex(anEvent);
0092
0093   // histograms
0094   //
0095   G4AnalysisManager* analysisManager = G4AnalysisManager::Instance();
0096   analysisManager->FillH1(1, Zvertex);
0097   analysisManager->FillH1(2, fParticleGun->GetParticleEnergy());
0098 }
0099
0100 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......