field05/src/F05SteppingAction.cc

0001 //
0002 // ********************************************************************
0003 // * License and Disclaimer                                           *
0004 // *                                                                  *
0005 // * The  Geant4 software  is  copyright of the Copyright Holders  of *
0006 // * the Geant4 Collaboration.  It is provided  under  the terms  and *
0007 // * conditions of the Geant4 Software License,  included in the file *
0008 // * LICENSE and available at  http://cern.ch/geant4/license .  These *
0009 // * include a list of copyright holders.                             *
0010 // *                                                                  *
0011 // * Neither the authors of this software system, nor their employing *
0012 // * institutes,nor the agencies providing financial support for this *
0013 // * work  make  any representation or  warranty, express or implied, *
0014 // * regarding  this  software system or assume any liability for its *
0015 // * use.  Please see the license in the file  LICENSE  and URL above *
0016 // * for the full disclaimer and the limitation of liability.         *
0017 // *                                                                  *
0018 // * This  code  implementation is the result of  the  scientific and *
0019 // * technical work of the GEANT4 collaboration.                      *
0020 // * By using,  copying,  modifying or  distributing the software (or *
0021 // * any work based  on the software)  you  agree  to acknowledge its *
0022 // * use  in  resulting  scientific  publications,  and indicate your *
0023 // * acceptance of all terms of the Geant4 Software license.          *
0024 // ********************************************************************
0025 //
0026 //
0027 /// \file field/field05/src/F05SteppingAction.cc
0028 /// \brief Implementation of the F05SteppingAction class
0029 //
0030
0031 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0032 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0033
0034 #include "F05SteppingAction.hh"
0035
0036 #include "G4ProcessTable.hh"
0037 #include "G4Step.hh"
0038 #include "G4SystemOfUnits.hh"
0039 #include "G4Track.hh"
0040
0041 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0042
0043 void F05SteppingAction::UserSteppingAction(const G4Step* aStep)
0044 {
0045   G4String processName = aStep->GetPostStepPoint()->GetProcessDefinedStep()->GetProcessName();
0046
0047   if (processName != "DecayWithSpin") {
0048     G4Track* aTrack = aStep->GetTrack();
0049
0050     G4String particleName = aStep->GetTrack()->GetDefinition()->GetParticleName();
0051
0052     G4ThreeVector polDir = aTrack->GetPolarization();
0053     G4ThreeVector momDir = aTrack->GetMomentumDirection();
0054
0055     if (particleName == "mu+") {
0056       if (momDir * polDir < (1. - 1.E-7)) {
0057         G4double cos_theta = momDir * polDir;
0058         G4double gTime = aTrack->GetGlobalTime();
0059
0060         G4cout << " *** ERROR - WARNING *** " << G4endl;
0061         G4cout << "processName: " << processName << G4endl;
0062         G4cout << "particleName " << particleName << G4endl;
0063         G4cout << "Global Time: " << gTime / ns << "nsec" << G4endl;
0064         G4cout << "Angle between spin and momentum:" << cos_theta << G4endl;
0065         G4Exception("SteppingAction::UserSteppingAction", "Error", FatalException,
0066                     "Angle between spin and momentum too large");
0067       }
0068     }
0069   }
0070 }