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25 //
26 /// \file DetectorConstruction.cc
27 /// \brief Implementation of the DetectorConstruction class
28 //
29 //
30 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
31 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
32
33 #include "DetectorConstruction.hh"
34
35 #include "DetectorMessenger.hh"
36
37 #include "G4Box.hh"
38 #include "G4GeometryManager.hh"
39 #include "G4LogicalVolume.hh"
40 #include "G4LogicalVolumeStore.hh"
41 #include "G4Material.hh"
42 #include "G4NistManager.hh"
43 #include "G4PVPlacement.hh"
44 #include "G4PhysicalConstants.hh"
45 #include "G4PhysicalVolumeStore.hh"
46 #include "G4RunManager.hh"
47 #include "G4SolidStore.hh"
48 #include "G4Sphere.hh"
49 #include "G4SystemOfUnits.hh"
50 #include "G4UnitsTable.hh"
51
52 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
53
54 DetectorConstruction::DetectorConstruction()
55 {
56 fRadius = 30 * cm;
57 fWorldSize = 1.1 * fRadius;
58 DefineMaterials();
59 SetMaterial("Water_ts");
60 fDetectorMessenger = new DetectorMessenger(this);
61 }
62
63 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
64
65 DetectorConstruction::~DetectorConstruction()
66 {
67 delete fDetectorMessenger;
68 }
69
70 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
71
72 G4VPhysicalVolume* DetectorConstruction::Construct()
73 {
74 return ConstructVolumes();
75 }
76
77 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
78
79 void DetectorConstruction::DefineMaterials()
80 {
81 // specific element name for thermal neutronHP
82 // (see G4ParticleHPThermalScatteringNames.cc)
83
84 G4int ncomponents, natoms;
85
86 // pressurized water
87 G4Element* H = new G4Element("TS_H_of_Water", "H", 1., 1.0079 * g / mole);
88 G4Element* O = new G4Element("Oxygen", "O", 8., 16.00 * g / mole);
89 G4Material* H2O = new G4Material("Water_ts", 1.000 * g / cm3, ncomponents = 2, kStateLiquid,
90 593 * kelvin, 150 * bar);
91 H2O->AddElement(H, natoms = 2);
92 H2O->AddElement(O, natoms = 1);
93 H2O->GetIonisation()->SetMeanExcitationEnergy(78.0 * eV);
94
95 // heavy water
96 G4Isotope* H2 = new G4Isotope("H2", 1, 2);
97 G4Element* D = new G4Element("TS_D_of_Heavy_Water", "D", 1);
98 D->AddIsotope(H2, 100 * perCent);
99 G4Material* D2O = new G4Material("HeavyWater", 1.11 * g / cm3, ncomponents = 2, kStateLiquid,
100 293.15 * kelvin, 1 * atmosphere);
101 D2O->AddElement(D, natoms = 2);
102 D2O->AddElement(O, natoms = 1);
103
104 // graphite
105 G4Isotope* C12 = new G4Isotope("C12", 6, 12);
106 G4Element* C = new G4Element("TS_C_of_Graphite", "C", ncomponents = 1);
107 C->AddIsotope(C12, 100. * perCent);
108 G4Material* graphite = new G4Material("graphite", 2.27 * g / cm3, ncomponents = 1, kStateSolid,
109 293 * kelvin, 1 * atmosphere);
110 graphite->AddElement(C, natoms = 1);
111
112 // NE213
113 G4Material* ne213 = new G4Material("NE213", 0.874 * g / cm3, ncomponents = 2);
114 ne213->AddElement(H, 9.2 * perCent);
115 ne213->AddElement(C, 90.8 * perCent);
116
117 // example of vacuum
118 fWorldMat = new G4Material("Galactic", 1, 1.01 * g / mole, universe_mean_density, kStateGas,
119 2.73 * kelvin, 3.e-18 * pascal);
120
121 /// G4cout << *(G4Material::GetMaterialTable()) << G4endl;
122 }
123
124 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
125
126 G4Material* DetectorConstruction::MaterialWithSingleIsotope(G4String name, G4String symbol,
127 G4double density, G4int Z, G4int A)
128 {
129 // define a material from an isotope
130 //
131 G4int ncomponents;
132 G4double abundance, massfraction;
133
134 G4Isotope* isotope = new G4Isotope(symbol, Z, A);
135
136 G4Element* element = new G4Element(name, symbol, ncomponents = 1);
137 element->AddIsotope(isotope, abundance = 100. * perCent);
138
139 G4Material* material = new G4Material(name, density, ncomponents = 1);
140 material->AddElement(element, massfraction = 100. * perCent);
141
142 return material;
143 }
144
145 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
146
147 G4VPhysicalVolume* DetectorConstruction::ConstructVolumes()
148 {
149 // Cleanup old geometry
150 G4GeometryManager::GetInstance()->OpenGeometry();
151 G4PhysicalVolumeStore::GetInstance()->Clean();
152 G4LogicalVolumeStore::GetInstance()->Clean();
153 G4SolidStore::GetInstance()->Clean();
154
155 // World
156 //
157 G4Box* sWorld = new G4Box("World", // name
158 fWorldSize, fWorldSize, fWorldSize); // dimensions
159
160 G4LogicalVolume* lWorld = new G4LogicalVolume(sWorld, // shape
161 fWorldMat, // material
162 "World"); // name
163
164 fPWorld = new G4PVPlacement(0, // no rotation
165 G4ThreeVector(), // at (0,0,0)
166 lWorld, // logical volume
167 "World", // name
168 0, // mother volume
169 false, // no boolean operation
170 0); // copy number
171
172 // Absorber
173 //
174 G4Sphere* sAbsor = new G4Sphere("Absorber", // name
175 0., fRadius, 0., twopi, 0., pi); // dimensions
176
177 fLAbsor = new G4LogicalVolume(sAbsor, // shape
178 fMaterial, // material
179 fMaterial->GetName()); // name
180
181 new G4PVPlacement(0, // no rotation
182 G4ThreeVector(), // at (0,0,0)
183 fLAbsor, // logical volume
184 fMaterial->GetName(), // name
185 lWorld, // mother volume
186 false, // no boolean operation
187 0); // copy number
188 PrintParameters();
189
190 // always return the root volume
191 //
192 return fPWorld;
193 }
194
195 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
196
197 void DetectorConstruction::PrintParameters()
198 {
199 G4cout << "\n The Absorber is " << G4BestUnit(fRadius, "Length") << " of " << fMaterial->GetName()
200 << "\n \n"
201 << fMaterial << G4endl;
202 }
203
204 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
205
206 void DetectorConstruction::SetMaterial(G4String materialChoice)
207 {
208 // search the material by its name
209 G4Material* pttoMaterial = G4NistManager::Instance()->FindOrBuildMaterial(materialChoice);
210
211 if (pttoMaterial) {
212 fMaterial = pttoMaterial;
213 if (fLAbsor) {
214 fLAbsor->SetMaterial(fMaterial);
215 }
216 G4RunManager::GetRunManager()->PhysicsHasBeenModified();
217 }
218 else {
219 G4cout << "\n--> warning from DetectorConstruction::SetMaterial : " << materialChoice
220 << " not found" << G4endl;
221 }
222 }
223
224 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
225
226 void DetectorConstruction::SetRadius(G4double value)
227 {
228 fRadius = value;
229 fWorldSize = 1.1 * fRadius;
230 G4RunManager::GetRunManager()->ReinitializeGeometry();
231 }
232
233 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
234