TestEm6/src/SteppingAction.cc

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0025 //
0026 /// \file SteppingAction.cc
0027 /// \brief Implementation of the SteppingAction class
0028
0029 #include "SteppingAction.hh"
0030
0031 #include "RunAction.hh"
0032
0033 #include "G4ParticleTypes.hh"
0034 #include "G4SteppingManager.hh"
0035 #include "G4VProcess.hh"
0036
0037 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0038
0039 SteppingAction::SteppingAction(RunAction* RuAct) : G4UserSteppingAction(), fRunAction(RuAct)
0040 {
0041   fMuonMass = G4MuonPlus::MuonPlus()->GetPDGMass();
0042 }
0043
0044 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0045
0046 SteppingAction::~SteppingAction() {}
0047
0048 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0049
0050 void SteppingAction::UserSteppingAction(const G4Step* aStep)
0051 {
0052   const G4VProcess* process = aStep->GetPostStepPoint()->GetProcessDefinedStep();
0053   if (process == 0) return;
0054   G4String processName = process->GetProcessName();
0055   fRunAction->CountProcesses(processName);  // count processes
0056
0057   if (processName != "GammaToMuPair") return;
0058
0059   G4StepPoint* PrePoint = aStep->GetPreStepPoint();
0060   G4double EGamma = PrePoint->GetTotalEnergy();
0061   G4ThreeVector PGamma = PrePoint->GetMomentum();
0062
0063   G4double Eplus(0), Eminus(0);
0064   G4ThreeVector Pplus, Pminus;
0065   const G4TrackVector* secondary = fpSteppingManager->GetSecondary();
0066   for (size_t lp = 0; lp < (*secondary).size(); lp++) {
0067     if ((*secondary)[lp]->GetDefinition() == G4MuonPlus::MuonPlusDefinition()) {
0068       Eplus = (*secondary)[lp]->GetTotalEnergy();
0069       Pplus = (*secondary)[lp]->GetMomentum();
0070     }
0071     else {
0072       Eminus = (*secondary)[lp]->GetTotalEnergy();
0073       Pminus = (*secondary)[lp]->GetMomentum();
0074     }
0075   }
0076
0077   G4double xPlus = Eplus / EGamma, xMinus = Eminus / EGamma;
0078   G4double thetaPlus = PGamma.angle(Pplus), thetaMinus = PGamma.angle(Pminus);
0079   G4double GammaPlus = Eplus / fMuonMass;
0080   G4double GammaMinus = Eminus / fMuonMass;
0081
0082   G4AnalysisManager* analysisManager = G4AnalysisManager::Instance();
0083
0084   if (0.0 == thetaPlus || 0.0 == thetaMinus) {
0085     G4cout << "SteppingAction: "
0086            << "thetaPlus= " << thetaPlus << " thetaMinus= " << thetaMinus
0087            << " gamPlus= " << GammaPlus << " gamMinus= " << GammaMinus << "  "
0088            << thetaPlus * GammaPlus - thetaMinus * GammaMinus << G4endl;
0089     return;
0090   }
0091   analysisManager->FillH1(1, 1. / (1. + std::pow(thetaPlus * GammaPlus, 2)));
0092   analysisManager->FillH1(2, std::log10(thetaPlus * GammaPlus));
0093
0094   analysisManager->FillH1(3, std::log10(thetaMinus * GammaMinus));
0095   analysisManager->FillH1(4,
0096                           std::log10(std::fabs(thetaPlus * GammaPlus - thetaMinus * GammaMinus)));
0097
0098   analysisManager->FillH1(5, xPlus);
0099   analysisManager->FillH1(6, xMinus);
0100 }
0101
0102 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......