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25 // 22 //
26 /// \file electromagnetic/TestEm3/src/Stepping << 23 // $Id: SteppingAction.cc,v 1.20 2005/05/18 15:28:37 maire Exp $
27 /// \brief Implementation of the SteppingActio << 24 // GEANT4 tag $Name: geant4-07-01 $
28 // <<
29 // 25 //
30 //....oooOO0OOooo........oooOO0OOooo........oo 26 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
31 //....oooOO0OOooo........oooOO0OOooo........oo 27 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
32 28
33 #include "SteppingAction.hh" 29 #include "SteppingAction.hh"
34 30
35 #include "DetectorConstruction.hh" 31 #include "DetectorConstruction.hh"
>> 32 #include "RunAction.hh"
36 #include "EventAction.hh" 33 #include "EventAction.hh"
37 #include "HistoManager.hh" 34 #include "HistoManager.hh"
38 #include "Run.hh" <<
39 35
40 #include "G4PhysicalConstants.hh" << 36 #include "G4Track.hh"
41 #include "G4Positron.hh" 37 #include "G4Positron.hh"
42 #include "G4RunManager.hh" 38 #include "G4RunManager.hh"
43 39
44 //....oooOO0OOooo........oooOO0OOooo........oo 40 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
45 41
46 SteppingAction::SteppingAction(DetectorConstru << 42 SteppingAction::SteppingAction(DetectorConstruction* det, RunAction* run,
47 : fDetector(det), fEventAct(evt) << 43 EventAction* evt, HistoManager* hist)
>> 44 :G4UserSteppingAction(),detector(det),runAct(run),eventAct(evt),
>> 45 histoManager(hist)
>> 46 {}
>> 47
>> 48 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 49
>> 50 SteppingAction::~SteppingAction()
48 {} 51 {}
49 52
50 //....oooOO0OOooo........oooOO0OOooo........oo 53 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
51 54
52 void SteppingAction::UserSteppingAction(const 55 void SteppingAction::UserSteppingAction(const G4Step* aStep)
53 { 56 {
54 // track informations << 57 //initialize Energy flow
55 const G4StepPoint* prePoint = aStep->GetPreS << 58 if (aStep->GetTrack()->GetCurrentStepNumber() == 1) Idold = 0;
56 << 59
57 // if World, return << 60 //if World, return
58 // 61 //
59 G4VPhysicalVolume* volume = prePoint->GetTou << 62 const G4StepPoint* prePoint = aStep->GetPreStepPoint();
60 // if sum of absorbers do not fill exactly a << 63 G4VPhysicalVolume* volume = prePoint->GetPhysicalVolume();
61 const G4Material* mat = volume->GetLogicalVo << 64 //if sum of absorbers do not fill exactly a layer: check material, not volume.
62 if (mat == fDetector->GetWorldMaterial()) re << 65 G4Material* mat = volume->GetLogicalVolume()->GetMaterial();
63 << 66 if (mat == detector->GetWorldMaterial()) return;
>> 67
>> 68 //here we are in an absorber. Locate it
>> 69 //
>> 70 G4int absorNum = volume->GetCopyNo();
>> 71 G4int layerNum = prePoint->GetTouchable()->GetReplicaNumber(1);
>> 72
>> 73 //track informations
64 const G4StepPoint* endPoint = aStep->GetPost 74 const G4StepPoint* endPoint = aStep->GetPostStepPoint();
65 const G4ParticleDefinition* particle = aStep << 75 const G4Track* track = aStep->GetTrack();
66 << 76 const G4ParticleDefinition* particle = track->GetDefinition();
67 // here we are in an absorber. Locate it << 77
68 // << 78 // collect energy deposit
69 G4int absorNum = prePoint->GetTouchableHandl << 79 G4double edep = aStep->GetTotalEnergyDeposit();
70 G4int layerNum = prePoint->GetTouchableHandl << 80
71 <<
72 // get Run <<
73 Run* run = static_cast<Run*>(G4RunManager::G <<
74 <<
75 // collect energy deposit taking into accoun <<
76 G4double edep = aStep->GetTotalEnergyDeposit <<
77 <<
78 // collect step length of charged particles 81 // collect step length of charged particles
79 G4double stepl = 0.; 82 G4double stepl = 0.;
80 if (particle->GetPDGCharge() != 0.) { << 83 if (particle->GetPDGCharge() != 0.) stepl = aStep->GetStepLength();
81 stepl = aStep->GetStepLength(); << 84
82 run->AddChargedStep(); <<
83 } <<
84 else { <<
85 run->AddNeutralStep(); <<
86 } <<
87 <<
88 // G4cout << "Nabs= " << absorNum << " ed <<
89 <<
90 // sum up per event 85 // sum up per event
91 fEventAct->SumEnergy(absorNum, edep, stepl); << 86 eventAct->SumEnergy(absorNum,edep,stepl);
92 << 87
93 // longitudinal profile of edep per absorber << 88 //longitudinal profile of edep per absorber
94 if (edep > 0.) { << 89 if (edep>0.) histoManager->FillHisto(MaxAbsor+absorNum, layerNum+1., edep);
95 G4AnalysisManager::Instance()->FillH1(kMax << 90
96 } << 91 //energy flow
97 // energy flow << 92 //
98 // << 93 // unique identificator of layer+absorber
99 // unique identificator of layer+absorber << 94 G4int Idnow = (detector->GetNbOfAbsor())*layerNum + absorNum;
100 G4int Idnow = (fDetector->GetNbOfAbsor()) * << 95 if (track->GetCurrentStepNumber() == 1) Idold = Idnow; // track begins
101 G4int plane; << 96 //
102 // << 97 //first step in the absorber ?
103 // leaving the absorber ? << 98 G4int plane=0;
104 if (endPoint->GetStepStatus() == fGeomBounda << 99 if (prePoint->GetStepStatus() == fGeomBoundary) {
105 G4ThreeVector position = endPoint->GetPosi << 100 G4double Eflow = prePoint->GetKineticEnergy();
106 G4ThreeVector direction = endPoint->GetMom << 101 if (particle == G4Positron::Positron()) Eflow += 2*electron_mass_c2;
107 G4double sizeYZ = 0.5 * fDetector->GetCalo << 102 if (Idnow > Idold) runAct->sumForwEflow(plane=Idnow, Eflow);
>> 103 else if (Idnow < Idold) runAct->sumBackEflow(plane=Idnow+1, Eflow);
>> 104 Idold = Idnow;
>> 105 }
>> 106
>> 107 //last plane : forward leakage
>> 108 G4int Idlast = (detector->GetNbOfAbsor())*(detector->GetNbOfLayers());
>> 109 if ((Idnow == Idlast) && (endPoint->GetStepStatus() == fGeomBoundary)) {
108 G4double Eflow = endPoint->GetKineticEnerg 110 G4double Eflow = endPoint->GetKineticEnergy();
109 if (particle == G4Positron::Positron()) Ef << 111 if (particle == G4Positron::Positron()) Eflow += 2*electron_mass_c2;
110 if ((std::abs(position.y()) >= sizeYZ) || << 112 runAct->sumForwEflow(plane=Idlast+1, Eflow);
111 run->SumLateralEleak(Idnow, Eflow); <<
112 else if (direction.x() >= 0.) <<
113 run->SumEnergyFlow(plane = Idnow + 1, Ef <<
114 else <<
115 run->SumEnergyFlow(plane = Idnow, -Eflow <<
116 } 113 }
117 114
118 //// example of Birk attenuation << 115 //// example of Birk attenuation
119 /// G4double destep = aStep->GetTotalEnerg << 116 //// G4double destep = aStep->GetTotalEnergyDeposit();
120 /// G4double response = BirksAttenuation(aSt << 117 //// G4double response = BirkAttenuation(aStep);
121 /// G4cout << " Destep: " << destep/keV << " << 118 //// G4cout << " Destep: " << destep/keV << " keV"
122 /// << " response after Birks: " << re << 119 //// << " response after Birk: " << response/keV << " keV" << G4endl;
123 } 120 }
124 121
125 //....oooOO0OOooo........oooOO0OOooo........oo 122 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
126 123
127 G4double SteppingAction::BirksAttenuation(cons << 124 G4double SteppingAction::BirkAttenuation(const G4Step* aStep)
128 { 125 {
129 // Example of Birk attenuation law in organi << 126 //Example of Birk attenuation law in organic scintillators.
130 // adapted from Geant3 PHYS337. See MIN 80 ( << 127 //adapted from Geant3 PHYS337. See MIN 80 (1970) 239-244
131 // << 128 //
132 const G4Material* material = aStep->GetTrack << 129 const G4String myMaterial = "Scintillator";
133 G4double birk1 = material->GetIonisation()-> << 130 const G4double birk1 = 0.013*g/(MeV*cm2);
134 G4double destep = aStep->GetTotalEnergyDepos << 131 //
135 G4double stepl = aStep->GetStepLength(); << 132 G4double destep = aStep->GetTotalEnergyDeposit();
136 G4double charge = aStep->GetTrack()->GetDefi << 133 G4Material* material = aStep->GetTrack()->GetMaterial();
137 // << 134 G4double charge = aStep->GetTrack()->GetDefinition()->GetPDGCharge();
138 G4double response = destep; << 135 //
139 if (birk1 * destep * stepl * charge != 0.) { << 136 G4double response = destep;
140 response = destep / (1. + birk1 * destep / << 137 if ((material->GetName()==myMaterial)&&(charge!=0.))
141 } << 138 {
142 return response; << 139 G4double correction =
>> 140 birk1*destep/((material->GetDensity())*(aStep->GetStepLength()));
>> 141 response = destep/(1. + correction);
>> 142 }
>> 143 return response;
143 } 144 }
144 145
145 //....oooOO0OOooo........oooOO0OOooo........oo 146 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 147
146 148