| 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 // The Geant4-DNA web site is available at http://geant4-dna.org
34 //
35 /// \file DetectorConstruction.cc
36 /// \brief Implementation of the DetectorConstruction class
37
38 #include "DetectorConstruction.hh"
39
40 #include "DetectorMessenger.hh"
41 #include "TrackerSD.hh"
42
43 #include "G4Box.hh"
44 #include "G4GeometryManager.hh"
45 #include "G4GeometryTolerance.hh"
46 #include "G4NistManager.hh"
47 #include "G4PVPlacement.hh"
48 #include "G4SDManager.hh"
49 #include "G4SystemOfUnits.hh"
50 #include "G4UnitsTable.hh"
51 #include "G4UserLimits.hh"
52
53 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
54
55 DetectorConstruction::DetectorConstruction() : G4VUserDetectorConstruction()
56 {
57 // Create commands for interactive definition of the detector
58 fDetectorMessenger = std::make_unique<DetectorMessenger>(this);
59 }
60
61 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
62
63 DetectorConstruction::~DetectorConstruction() = default;
64
65 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
66
67 G4VPhysicalVolume* DetectorConstruction::Construct()
68 {
69 // Define materials
70 DefineMaterials();
71
72 // Define volumes
73 return DefineVolumes();
74 }
75
76 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
77
78 void DetectorConstruction::DefineMaterials()
79 {
80 // Water is defined from NIST material database
81 G4NistManager* man = G4NistManager::Instance();
82 G4Material* H2O = man->FindOrBuildMaterial("G4_WATER");
83 fpWaterMaterial = H2O;
84
85 // Print materials
86 G4cout << *(G4Material::GetMaterialTable()) << G4endl;
87 }
88
89 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
90
91 G4VPhysicalVolume* DetectorConstruction::DefineVolumes()
92 {
93 G4double worldLength = 10 * m;
94
95 // World
96
97 G4GeometryManager::GetInstance()->SetWorldMaximumExtent(worldLength);
98
99 G4cout << "Computed tolerance = "
100 << G4GeometryTolerance::GetInstance()->GetSurfaceTolerance() / nm << " nm" << G4endl;
101
102 auto* worldS = new G4Box("world", // its name
103 worldLength / 2, worldLength / 2, worldLength / 2); // its size
104
105 auto* worldLV = new G4LogicalVolume(worldS, // its solid
106 fpWaterMaterial, // its material
107 "World_LV"); // its name
108
109 G4VPhysicalVolume* worldPV = new G4PVPlacement(nullptr, // no rotation
110 G4ThreeVector(), // at (0,0,0)
111 worldLV, // its logical volume
112 "World", // its name
113 nullptr, // its mother volume
114 false, // no boolean operations
115 0, // copy number
116 false); // checking overlaps
117
118 worldLV->SetUserLimits(new G4UserLimits(fpMaxStepSize, DBL_MAX, DBL_MAX, fpTrackingCut));
119
120 PrintParameters();
121
122 return worldPV;
123 }
124
125 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
126
127 void DetectorConstruction::ConstructSDandField()
128 {
129 // Sensitive detector
130
131 G4String trackerChamberSDname = "TrackerChamberSD";
132
133 auto* aTrackerSD = new TrackerSD(trackerChamberSDname, "TrackerHitsCollection");
134 aTrackerSD->SetRadius(fRadius);
135
136 G4SDManager::GetSDMpointer()->AddNewDetector(aTrackerSD);
137
138 SetSensitiveDetector("World_LV", aTrackerSD, true);
139 }
140
141 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
142
143 void DetectorConstruction::SetTrackingCut(const G4double& value)
144 {
145 fpTrackingCut = value;
146 }
147
148 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
149
150 void DetectorConstruction::SetMaxStepSize(const G4double& value)
151 {
152 fpMaxStepSize = value;
153 }
154
155 void DetectorConstruction::SetTrackerSDRadius(const G4double& value)
156 {
157 fRadius = value;
158 }
159
160 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
161
162 void DetectorConstruction::PrintParameters() const
163 {
164 G4cout << "\n---------------------------------------------------------\n";
165 G4cout << "---> The tracking cut is set to " << G4BestUnit(fpTrackingCut, "Energy") << G4endl;
166 G4cout << "---> The maximum step size is set to " << G4BestUnit(fpMaxStepSize, "Length")
167 << G4endl;
168 G4cout << "---> The TrackerSD radius is set to " << G4BestUnit(fRadius, "Length") << G4endl;
169 G4cout << "\n---------------------------------------------------------\n";
170 }
171
172 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
173