| 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 //
36 /// \file DetectorConstruction.cc
37 /// \brief Implementation of the DetectorConstruction class
38
39 #include "DetectorConstruction.hh"
40
41 #include "DetectorMessenger.hh"
42 #include "PhysicsList.hh"
43
44 #include "G4LogicalVolume.hh"
45 #include "G4RunManager.hh"
46 #include "G4SystemOfUnits.hh"
47
48 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
49
50 DetectorConstruction::DetectorConstruction(PhysicsList* ptr)
51 : G4VUserDetectorConstruction(),
52 fpWaterMaterial(nullptr),
53 fLogicWorld(nullptr),
54 fPhysiWorld(nullptr)
55 {
56 fDetectorMessenger = new DetectorMessenger(this, ptr);
57 }
58
59 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
60
61 DetectorConstruction::~DetectorConstruction()
62 {
63 delete fDetectorMessenger;
64 }
65
66 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
67
68 void DetectorConstruction::DefineMaterials()
69 {
70 // Water is defined from NIST material database
71 G4NistManager* man = G4NistManager::Instance();
72
73 G4Material* H2O = man->FindOrBuildMaterial("G4_WATER");
74
75 /*
76 If one wishes to test other density value for water material,
77 one should use instead:
78 G4Material * H2O = man->BuildMaterialWithNewDensity("G4_WATER_MODIFIED",
79 "G4_WATER",1.100*g/cm3);
80
81 Note: any string for "G4_WATER_MODIFIED" parameter is accepted
82 and "G4_WATER" parameter should not be changed
83 Both materials are created and can be selected from dna.mac
84 */
85 fpWaterMaterial = H2O;
86
87 // G4cout << "-> Density of water material (g/cm3)="
88 // << fpWaterMaterial->GetDensity()/(g/cm/cm/cm) << G4endl;
89
90 G4cout << *(G4Material::GetMaterialTable()) << G4endl;
91 }
92
93 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
94
95 G4VPhysicalVolume* DetectorConstruction::Construct()
96 {
97 if (fPhysiWorld) {
98 return fPhysiWorld;
99 }
100 DefineMaterials();
101
102 // World volume
103
104 G4double worldSizeX = 10 * micrometer;
105 G4double worldSizeY = worldSizeX;
106 G4double worldSizeZ = worldSizeX;
107
108 G4Box* solidWorld = new G4Box("World", // its name
109 worldSizeX / 2, worldSizeY / 2, worldSizeZ / 2); // its size
110
111 fLogicWorld = new G4LogicalVolume(solidWorld, // its solid
112 fpWaterMaterial, // its material
113 "World"); // its name
114
115 fPhysiWorld = new G4PVPlacement(0, // no rotation
116 G4ThreeVector(), // at (0,0,0)
117 "World", // its name
118 fLogicWorld, // its logical volume
119 0, // its mother volume
120 false, // no boolean operation
121 0); // copy number
122
123 // Target volume
124
125 G4Box* solidTarget = new G4Box("volumeTarget", // its name
126 worldSizeX / 10, worldSizeY / 2, worldSizeZ / 2); // its size
127
128 fLogicTarget = new G4LogicalVolume(solidTarget, // its solid
129 fpWaterMaterial, // its material
130 "volumeTarget"); // its name
131
132 fPhysiTarget = new G4PVPlacement(0, // no rotation
133 G4ThreeVector(), // at (0,0,0)
134 "volumeTarget", // its name
135 fLogicTarget, // its logical volume
136 fPhysiWorld, // its mother volume
137 false, // no boolean operation
138 0); // copy number
139
140 // Target region
141
142 G4Region* targetRegion = new G4Region("regionTarget");
143
144 // Cuts needed to allow combination of Physics
145 // Default EM settings for fast simulation for e+, e-, gammas
146 // 1 um proton cut avoids creation of very slow recoil ions
147 G4ProductionCuts* cuts = new G4ProductionCuts();
148 cuts->SetProductionCut(0.7 * mm, "gamma");
149 cuts->SetProductionCut(0.7 * mm, "e-");
150 cuts->SetProductionCut(0.7 * mm, "e+");
151 cuts->SetProductionCut(1 * micrometer, "proton");
152 targetRegion->SetProductionCuts(cuts);
153
154 targetRegion->AddRootLogicalVolume(fLogicTarget);
155
156 // Visualization attributes - white
157 G4VisAttributes* worldVisAtt = new G4VisAttributes(G4Colour(1.0, 1.0, 1.0));
158 worldVisAtt->SetVisibility(true);
159 fLogicWorld->SetVisAttributes(worldVisAtt);
160
161 G4VisAttributes* targetVisAtt = new G4VisAttributes(G4Colour(1.0, 0.0, 0.0));
162 targetVisAtt->SetVisibility(true);
163 fLogicTarget->SetVisAttributes(targetVisAtt);
164
165 return fPhysiWorld;
166 }
167
168 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
169
170 void DetectorConstruction::SetMaterial(const G4String& materialChoice)
171 {
172 // Search the material by its name
173 G4Material* pttoMaterial = G4NistManager::Instance()->FindOrBuildMaterial(materialChoice);
174
175 if (pttoMaterial) {
176 fpWaterMaterial = pttoMaterial;
177 if (fLogicWorld) {
178 fLogicWorld->SetMaterial(fpWaterMaterial);
179 }
180 G4RunManager::GetRunManager()->GeometryHasBeenModified();
181 }
182 }
183