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25 //
26 /// \file electromagnetic/TestEm6/src/SteppingAction.cc
27 /// \brief Implementation of the SteppingAction class
28 //
29 //
30 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
31 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
32
33 #include "SteppingAction.hh"
34
35 #include "RunAction.hh"
36
37 #include "G4ParticleTypes.hh"
38 #include "G4SteppingManager.hh"
39 #include "G4VProcess.hh"
40
41 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
42
43 SteppingAction::SteppingAction(RunAction* RuAct) : G4UserSteppingAction(), fRunAction(RuAct)
44 {
45 fMuonMass = G4MuonPlus::MuonPlus()->GetPDGMass();
46 }
47
48 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
49
50 SteppingAction::~SteppingAction() {}
51
52 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
53
54 void SteppingAction::UserSteppingAction(const G4Step* aStep)
55 {
56 const G4VProcess* process = aStep->GetPostStepPoint()->GetProcessDefinedStep();
57 if (process == 0) return;
58 G4String processName = process->GetProcessName();
59 fRunAction->CountProcesses(processName); // count processes
60
61 if (processName != "GammaToMuPair") return;
62
63 G4StepPoint* PrePoint = aStep->GetPreStepPoint();
64 G4double EGamma = PrePoint->GetTotalEnergy();
65 G4ThreeVector PGamma = PrePoint->GetMomentum();
66
67 G4double Eplus(0), Eminus(0);
68 G4ThreeVector Pplus, Pminus;
69 const G4TrackVector* secondary = fpSteppingManager->GetSecondary();
70 for (size_t lp = 0; lp < (*secondary).size(); lp++) {
71 if ((*secondary)[lp]->GetDefinition() == G4MuonPlus::MuonPlusDefinition()) {
72 Eplus = (*secondary)[lp]->GetTotalEnergy();
73 Pplus = (*secondary)[lp]->GetMomentum();
74 }
75 else {
76 Eminus = (*secondary)[lp]->GetTotalEnergy();
77 Pminus = (*secondary)[lp]->GetMomentum();
78 }
79 }
80
81 G4double xPlus = Eplus / EGamma, xMinus = Eminus / EGamma;
82 G4double thetaPlus = PGamma.angle(Pplus), thetaMinus = PGamma.angle(Pminus);
83 G4double GammaPlus = Eplus / fMuonMass;
84 G4double GammaMinus = Eminus / fMuonMass;
85
86 G4AnalysisManager* analysisManager = G4AnalysisManager::Instance();
87
88 if (0.0 == thetaPlus || 0.0 == thetaMinus) {
89 G4cout << "SteppingAction: "
90 << "thetaPlus= " << thetaPlus << " thetaMinus= " << thetaMinus
91 << " gamPlus= " << GammaPlus << " gamMinus= " << GammaMinus << " "
92 << thetaPlus * GammaPlus - thetaMinus * GammaMinus << G4endl;
93 return;
94 }
95 analysisManager->FillH1(1, 1. / (1. + std::pow(thetaPlus * GammaPlus, 2)));
96 analysisManager->FillH1(2, std::log10(thetaPlus * GammaPlus));
97
98 analysisManager->FillH1(3, std::log10(thetaMinus * GammaMinus));
99 analysisManager->FillH1(4,
100 std::log10(std::fabs(thetaPlus * GammaPlus - thetaMinus * GammaMinus)));
101
102 analysisManager->FillH1(5, xPlus);
103 analysisManager->FillH1(6, xMinus);
104 }
105
106 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
107