| Geant4 Cross Reference |
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25 //
26 // This example is provided by the Geant4-DNA collaboration
27 // Any report or published results obtained using the Geant4-DNA software
28 // shall cite the following Geant4-DNA collaboration publications:
29 // Med. Phys. 45 (2018) e722-e739
30 // Phys. Med. 31 (2015) 861-874
31 // Med. Phys. 37 (2010) 4692-4708
32 // Int. J. Model. Simul. Sci. Comput. 1 (2010) 157–178
33 //
34 // The Geant4-DNA web site is available at http://geant4-dna.org
35 //
36 /// \file DetectorConstruction.cc
37 /// \brief Implementation of the DetectorConstruction class
38
39 #include "DetectorConstruction.hh"
40
41 #include "DetectorMessenger.hh"
42 #include "TrackerSD.hh"
43
44 #include "G4Box.hh"
45 #include "G4GeometryManager.hh"
46 #include "G4GeometryTolerance.hh"
47 #include "G4NistManager.hh"
48 #include "G4PVPlacement.hh"
49 #include "G4SDManager.hh"
50 #include "G4SystemOfUnits.hh"
51 #include "G4UnitsTable.hh"
52 #include "G4UserLimits.hh"
53
54 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
55
56 DetectorConstruction::DetectorConstruction() : G4VUserDetectorConstruction(), fDetectorMessenger(0)
57 {
58 // Default tracking cut
59 fTrackingCut = 9 * eV;
60
61 // Create commands for interactive definition of the detector
62 fDetectorMessenger = new DetectorMessenger(this);
63 }
64
65 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
66
67 DetectorConstruction::~DetectorConstruction()
68 {
69 delete fDetectorMessenger;
70 }
71
72 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
73
74 G4VPhysicalVolume* DetectorConstruction::Construct()
75 {
76 // Define materials
77 DefineMaterials();
78
79 // Define volumes
80 return DefineVolumes();
81 }
82
83 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
84
85 void DetectorConstruction::DefineMaterials()
86 {
87 // Water is defined from NIST material database
88 G4NistManager* man = G4NistManager::Instance();
89
90 G4Material* H2O = man->FindOrBuildMaterial("G4_WATER");
91
92 fWaterMaterial = H2O;
93
94 // Print materials
95 G4cout << *(G4Material::GetMaterialTable()) << G4endl;
96 }
97
98 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
99
100 G4VPhysicalVolume* DetectorConstruction::DefineVolumes()
101 {
102 G4double worldLength = 1 * km;
103
104 // World
105
106 G4GeometryManager::GetInstance()->SetWorldMaximumExtent(worldLength);
107
108 G4cout << "Computed tolerance = "
109 << G4GeometryTolerance::GetInstance()->GetSurfaceTolerance() / nm << " nm" << G4endl;
110
111 G4Box* worldS = new G4Box("world", // its name
112 worldLength / 2, worldLength / 2, worldLength / 2); // its size
113
114 G4LogicalVolume* worldLV = new G4LogicalVolume(worldS, // its solid
115 fWaterMaterial, // its material
116 "World_LV"); // its name
117
118 G4VPhysicalVolume* worldPV = new G4PVPlacement(0, // no rotation
119 G4ThreeVector(), // at (0,0,0)
120 worldLV, // its logical volume
121 "World", // its name
122 0, // its mother volume
123 false, // no boolean operations
124 0, // copy number
125 false); // checking overlaps
126
127 worldLV->SetUserLimits(new G4UserLimits(DBL_MAX, DBL_MAX, DBL_MAX, fTrackingCut));
128
129 PrintParameters();
130
131 return worldPV;
132 }
133
134 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
135
136 void DetectorConstruction::ConstructSDandField()
137 {
138 // Sensitive detectors
139
140 G4String trackerChamberSDname = "TrackerChamberSD";
141
142 TrackerSD* aTrackerSD = new TrackerSD(trackerChamberSDname, "TrackerHitsCollection");
143
144 G4SDManager::GetSDMpointer()->AddNewDetector(aTrackerSD);
145
146 SetSensitiveDetector("World_LV", aTrackerSD, true);
147 }
148
149 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
150
151 void DetectorConstruction::SetTrackingCut(G4double value)
152 {
153 fTrackingCut = value;
154 }
155
156 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
157
158 void DetectorConstruction::PrintParameters() const
159 {
160 G4cout << "\n---------------------------------------------------------\n";
161 G4cout << "---> The tracking cut is set to " << G4BestUnit(fTrackingCut, "Energy") << G4endl;
162 G4cout << "\n---------------------------------------------------------\n";
163 }
164
165 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
166