| Geant4 Cross Reference |
1 //
2 // ********************************************************************
3 // * License and Disclaimer *
4 // * *
5 // * The Geant4 software is copyright of the Copyright Holders of *
6 // * the Geant4 Collaboration. It is provided under the terms and *
7 // * conditions of the Geant4 Software License, included in the file *
8 // * LICENSE and available at http://cern.ch/geant4/license . These *
9 // * include a list of copyright holders. *
10 // * *
11 // * Neither the authors of this software system, nor their employing *
12 // * institutes,nor the agencies providing financial support for this *
13 // * work make any representation or warranty, express or implied, *
14 // * regarding this software system or assume any liability for its *
15 // * use. Please see the license in the file LICENSE and URL above *
16 // * for the full disclaimer and the limitation of liability. *
17 // * *
18 // * This code implementation is the result of the scientific and *
19 // * technical work of the GEANT4 collaboration. *
20 // * By using, copying, modifying or distributing the software (or *
21 // * any work based on the software) you agree to acknowledge its *
22 // * use in resulting scientific publications, and indicate your *
23 // * acceptance of all terms of the Geant4 Software license. *
24 // ********************************************************************
25 //
26 //
27 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
28 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
29
30 #include "SteppingAction.hh"
31
32 #include "DetectorConstruction.hh"
33 #include "EventAction.hh"
34
35 #include "G4Step.hh"
36
37 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
38
39 SteppingAction::SteppingAction(DetectorConstruction* det, EventAction* evt)
40 :G4UserSteppingAction(),detector(det),eventAct(evt)
41 {
42 first = true;
43 lvol_world = lvol_module = lvol_layer = lvol_fiber = 0;
44 }
45
46 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
47
48 SteppingAction::~SteppingAction()
49 {}
50
51 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
52
53 void SteppingAction::UserSteppingAction(const G4Step* step )
54 {
55 //some initialisation
56 //
57 if (first) {
58 lvol_world = detector->GetLvolWorld();
59 lvol_module = detector->GetLvolModule();
60 lvol_layer = detector->GetLvolLayer();
61 lvol_fiber = detector->GetLvolFiber();
62 first = false;
63 }
64
65 //if no edep, return
66 //
67 G4double edep = step->GetTotalEnergyDeposit();
68 ///if (edep == 0.) return;
69
70 //locate point in geometry
71 //
72 G4int iModule = 0;
73 G4int iLayer = 0;
74 G4int iFiber = 0;
75
76 G4TouchableHandle touch1 = step->GetPreStepPoint()->GetTouchableHandle();
77 G4LogicalVolume* lvol = touch1->GetVolume()->GetLogicalVolume();
78
79 if (lvol == lvol_world) return;
80 else if (lvol == lvol_module) { iModule = touch1->GetCopyNumber(0);}
81 else if (lvol == lvol_layer) { iLayer = touch1->GetCopyNumber(0);
82 iModule = touch1->GetCopyNumber(1);}
83 else if (lvol == lvol_fiber) { iFiber = touch1->GetCopyNumber(0);
84 iLayer = touch1->GetCopyNumber(1);
85 iModule = touch1->GetCopyNumber(2);}
86
87 // sum edep
88 //
89 eventAct->SumDeStep(iModule, iLayer, iFiber, edep);
90 }
91
92 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
93
94 G4double SteppingAction::BirksAttenuation(const G4Step* aStep)
95 {
96 //Example of Birk attenuation law in organic scintillators.
97 //adapted from Geant3 PHYS337. See MIN 80 (1970) 239-244
98 //
99 const G4Material* material = aStep->GetTrack()->GetMaterial();
100 G4double birk1 = material->GetIonisation()->GetBirksConstant();
101 G4double destep = aStep->GetTotalEnergyDeposit();
102 G4double stepl = aStep->GetStepLength();
103 G4double charge = aStep->GetTrack()->GetDefinition()->GetPDGCharge();
104 //
105 G4double response = destep;
106 if (birk1*destep*stepl*charge != 0.)
107 {
108 response = destep/(1. + birk1*destep/stepl);
109 }
110 return response;
111 }
112
113 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
114
115