amsEcal/src/SteppingAction.cc

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0025 //
0026 //
0027 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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0029
0030 #include "SteppingAction.hh"
0031
0032 #include "DetectorConstruction.hh"
0033 #include "EventAction.hh"
0034
0035 #include "G4Step.hh"
0036
0037 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0038
0039 SteppingAction::SteppingAction(DetectorConstruction* det, EventAction* evt)
0040 :G4UserSteppingAction(),detector(det),eventAct(evt)
0041 {
0042   first = true;
0043   lvol_world = lvol_module = lvol_layer = lvol_fiber = 0;
0044 }
0045
0046 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0047
0048 SteppingAction::~SteppingAction()
0049 {}
0050
0051 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0052
0053 void SteppingAction::UserSteppingAction(const G4Step* step )
0054 {
0055  //some initialisation
0056  //
0057  if (first) {
0058    lvol_world  = detector->GetLvolWorld();
0059    lvol_module = detector->GetLvolModule();
0060    lvol_layer  = detector->GetLvolLayer();
0061    lvol_fiber  = detector->GetLvolFiber();
0062    first = false;
0063  }
0064
0065  //if no edep, return
0066  //
0067  G4double edep = step->GetTotalEnergyDeposit();
0068  ///if (edep == 0.) return;
0069
0070  //locate point in geometry
0071  //
0072  G4int iModule = 0;
0073  G4int iLayer  = 0;
0074  G4int iFiber  = 0;
0075
0076  G4TouchableHandle touch1 = step->GetPreStepPoint()->GetTouchableHandle();
0077  G4LogicalVolume* lvol = touch1->GetVolume()->GetLogicalVolume();
0078
0079       if (lvol == lvol_world) return;
0080  else if (lvol == lvol_module) { iModule = touch1->GetCopyNumber(0);}
0081  else if (lvol == lvol_layer)  { iLayer  = touch1->GetCopyNumber(0);
0082                                  iModule = touch1->GetCopyNumber(1);}
0083  else if (lvol == lvol_fiber)  { iFiber  = touch1->GetCopyNumber(0);
0084                                  iLayer  = touch1->GetCopyNumber(1);
0085                                  iModule = touch1->GetCopyNumber(2);}
0086
0087  // sum edep
0088  //
0089  eventAct->SumDeStep(iModule, iLayer, iFiber, edep);
0090 }
0091
0092 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0093
0094 G4double SteppingAction::BirksAttenuation(const G4Step* aStep)
0095 {
0096  //Example of Birk attenuation law in organic scintillators.
0097  //adapted from Geant3 PHYS337. See MIN 80 (1970) 239-244
0098  //
0099  const G4Material* material = aStep->GetTrack()->GetMaterial();
0100  G4double birk1       = material->GetIonisation()->GetBirksConstant();
0101  G4double destep      = aStep->GetTotalEnergyDeposit();
0102  G4double stepl       = aStep->GetStepLength();
0103  G4double charge      = aStep->GetTrack()->GetDefinition()->GetPDGCharge();
0104  //
0105  G4double response = destep;
0106  if (birk1*destep*stepl*charge != 0.)
0107    {
0108      response = destep/(1. + birk1*destep/stepl);
0109    }
0110  return response;
0111 }
0112
0113 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0114