field05/src/F05SteppingAction.cc

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0025 //
0026 /// \file F05SteppingAction.cc
0027 /// \brief Implementation of the F05SteppingAction class
0028
0029 #include "F05SteppingAction.hh"
0030
0031 #include "G4ProcessTable.hh"
0032 #include "G4Step.hh"
0033 #include "G4SystemOfUnits.hh"
0034 #include "G4Track.hh"
0035
0036 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0037
0038 void F05SteppingAction::UserSteppingAction(const G4Step* aStep)
0039 {
0040   G4String processName = aStep->GetPostStepPoint()->GetProcessDefinedStep()->GetProcessName();
0041
0042   if (processName != "DecayWithSpin") {
0043     G4Track* aTrack = aStep->GetTrack();
0044
0045     G4String particleName = aStep->GetTrack()->GetDefinition()->GetParticleName();
0046
0047     G4ThreeVector polDir = aTrack->GetPolarization();
0048     G4ThreeVector momDir = aTrack->GetMomentumDirection();
0049
0050     if (particleName == "mu+") {
0051       if (momDir * polDir < (1. - 1.E-7)) {
0052         G4double cos_theta = momDir * polDir;
0053         G4double gTime = aTrack->GetGlobalTime();
0054
0055         G4cout << " *** ERROR - WARNING *** " << G4endl;
0056         G4cout << "processName: " << processName << G4endl;
0057         G4cout << "particleName " << particleName << G4endl;
0058         G4cout << "Global Time: " << gTime / ns << "nsec" << G4endl;
0059         G4cout << "Angle between spin and momentum:" << cos_theta << G4endl;
0060         G4Exception("SteppingAction::UserSteppingAction", "Error", FatalException,
0061                     "Angle between spin and momentum too large");
0062       }
0063     }
0064   }
0065 }