| 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 publication:
29 // Med. Phys. 37 (2010) 4692-4708
30 // J. Comput. Phys. 274 (2014) 841-882
31 // The Geant4-DNA web site is available at http://geant4-dna.org
32 //
33 //
34 /// \file DetectorConstruction.cc
35 /// \brief Implementation of the DetectorConstruction class
36
37 #include "DetectorConstruction.hh"
38
39 #include "DetectorMessenger.hh"
40
41 #include "G4ProductionCuts.hh"
42 #include "G4RunManager.hh"
43 #include "G4SystemOfUnits.hh"
44
45 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
46
47 DetectorConstruction::DetectorConstruction() : G4VUserDetectorConstruction()
48 {
49 // create commands for interactive definition of the detector
50 fDetectorMessenger = new DetectorMessenger(this);
51 }
52
53 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
54
55 DetectorConstruction::~DetectorConstruction()
56 {
57 delete fDetectorMessenger;
58 }
59
60 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
61
62 G4VPhysicalVolume* DetectorConstruction::Construct()
63
64 {
65 DefineMaterials();
66 return ConstructDetector();
67 }
68
69 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
70
71 void DetectorConstruction::DefineMaterials()
72 {
73 // Water is defined from NIST material database
74 G4NistManager* man = G4NistManager::Instance();
75 G4Material* H2O = man->FindOrBuildMaterial("G4_WATER");
76
77 // Default materials in setup.
78 fpWaterMaterial = H2O;
79
80 // needed variables
81
82 G4double z, a, density;
83 G4String name, symbol;
84 G4int nComponents, nAtoms;
85
86 a = 12.0107 * g / mole;
87 G4Element* elC = new G4Element(name = "Carbon", symbol = "C", z = 6., a);
88
89 a = 1.00794 * g / mole;
90 G4Element* elH = new G4Element(name = "Hydrogen", symbol = "H", z = 1., a);
91
92 a = 15.9994 * g / mole;
93 G4Element* elO = new G4Element(name = "Oxygen", symbol = "O", z = 8., a);
94
95 a = 14.0067 * g / mole;
96 G4Element* elN = new G4Element(name = "Nitrogen", symbol = "N", z = 7., a);
97
98 // Definition of Tetrahydrofurane (THF)
99
100 density = 1.346 * g / cm3;
101
102 fpTHFMaterial = new G4Material("THF", density, nComponents = 3);
103 fpTHFMaterial->AddElement(elC, nAtoms = 4);
104 fpTHFMaterial->AddElement(elH, nAtoms = 8);
105 fpTHFMaterial->AddElement(elO, nAtoms = 1);
106
107 // Definition of Nitrogen in nanodosimetry experiments
108
109 density = 0.34e-6 * g / cm3;
110
111 fpN2Material = new G4Material("N2", density, nComponents = 1);
112 fpN2Material->AddElement(elN, nAtoms = 2);
113 }
114
115 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
116
117 G4VPhysicalVolume* DetectorConstruction::ConstructDetector()
118 {
119 G4double diameter;
120 G4double highz;
121 G4Material* targetMaterial;
122 G4Material* worldMaterial;
123
124 if (fGeomType == "dna") {
125 // nanometric geometry
126 fWorldSize = 20. * nm;
127 diameter = 2.3 * nm;
128 highz = 3.4 * nm;
129 targetMaterial = fpTHFMaterial;
130 worldMaterial = fpWaterMaterial;
131 }
132 else {
133 // macrometric geometry (experimental target in nanodosimetry)
134 fWorldSize = 2 * cm;
135 diameter = 1 * cm;
136 highz = 1 * cm;
137 ;
138 targetMaterial = fpN2Material;
139 worldMaterial = fpN2Material;
140 }
141
142 fpSolidWorld = new G4Box("World", // its name
143 fWorldSize / 2, fWorldSize / 2, fWorldSize / 2); // its size
144
145 fpLogicWorld = new G4LogicalVolume(fpSolidWorld, // its solid
146 worldMaterial, // its material
147 "World"); // its name
148
149 fpPhysiWorld = new G4PVPlacement(0, // no rotation
150 G4ThreeVector(), // at (0,0,0)
151 "World", // its name
152 fpLogicWorld, // its logical volume
153 0, // its mother volume
154 false, // no boolean operation
155 0); // copy number
156
157 G4Tubs* solidTarget =
158 new G4Tubs("Target", 0, diameter / 2., highz / 2., 0 * degree, 360 * degree);
159
160 G4LogicalVolume* logicTarget = new G4LogicalVolume(solidTarget, // its solid
161 targetMaterial, // its material
162 "Target"); // its name
163
164 new G4PVPlacement(0, // no rotation
165 G4ThreeVector(), // at (0,0,0)
166 "Target", // its name
167 logicTarget, // its logical volume
168 fpPhysiWorld, // its mother volume
169 false, // no boolean operation
170 0); // copy number
171
172 // Visualization attributes
173 G4VisAttributes* worldVisAtt = new G4VisAttributes(G4Colour(1.0, 1.0, 1.0));
174 worldVisAtt->SetVisibility(true);
175 fpLogicWorld->SetVisAttributes(worldVisAtt);
176
177 G4VisAttributes* worldVisAtt1 = new G4VisAttributes(G4Colour(1.0, 0.0, 0.0));
178 worldVisAtt1->SetVisibility(true);
179 logicTarget->SetVisAttributes(worldVisAtt1);
180
181 return fpPhysiWorld;
182 }
183
184 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
185
186 void DetectorConstruction::SetGeometry(const G4String& name)
187 {
188 fGeomType = name;
189
190 // tell RunManager about changes
191 G4RunManager::GetRunManager()->GeometryHasBeenModified();
192 }
193