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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 "G4SystemOfUnits.hh"
49 #include "G4UnitsTable.hh"
50
51 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
52
53 DetectorConstruction::DetectorConstruction()
54 {
55 // default geometrical parameters
56 fAbsorThickness = 1 * cm;
57 fAbsorSizeYZ = 1 * cm;
58 fWorldSizeX = 1.2 * fAbsorThickness;
59 fWorldSizeYZ = 1.2 * fAbsorSizeYZ;
60
61 // materials
62 DefineMaterials();
63 SetAbsorMaterial("G4_Co");
64
65 // create commands for interactive definition of the geometry
66 fDetectorMessenger = new DetectorMessenger(this);
67 }
68
69 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
70
71 DetectorConstruction::~DetectorConstruction()
72 {
73 delete fDetectorMessenger;
74 }
75
76 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
77
78 G4VPhysicalVolume* DetectorConstruction::Construct()
79 {
80 return ConstructVolumes();
81 }
82
83 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
84
85 void DetectorConstruction::DefineMaterials()
86 {
87 // specific element name for thermal neutronHP
88 // (see G4ParticleHPThermalScatteringNames.cc)
89
90 G4int ncomponents, natoms;
91
92 // pressurized water
93 G4Element* H = new G4Element("TS_H_of_Water", "H", 1., 1.0079 * g / mole);
94 G4Element* O = new G4Element("Oxygen", "O", 8., 16.00 * g / mole);
95 G4Material* H2O = new G4Material("Water_ts", 1.000 * g / cm3, ncomponents = 2, kStateLiquid,
96 593 * kelvin, 150 * bar);
97 H2O->AddElement(H, natoms = 2);
98 H2O->AddElement(O, natoms = 1);
99 H2O->GetIonisation()->SetMeanExcitationEnergy(78.0 * eV);
100
101 // heavy water
102 G4Isotope* H2 = new G4Isotope("H2", 1, 2);
103 G4Element* D = new G4Element("TS_D_of_Heavy_Water", "D", 1);
104 D->AddIsotope(H2, 100 * perCent);
105 G4Material* D2O = new G4Material("HeavyWater", 1.11 * g / cm3, ncomponents = 2, kStateLiquid,
106 293.15 * kelvin, 1 * atmosphere);
107 D2O->AddElement(D, natoms = 2);
108 D2O->AddElement(O, natoms = 1);
109
110 // graphite
111 G4Isotope* C12 = new G4Isotope("C12", 6, 12);
112 G4Element* C = new G4Element("TS_C_of_Graphite", "C", ncomponents = 1);
113 C->AddIsotope(C12, 100. * perCent);
114 G4Material* graphite = new G4Material("graphite", 2.27 * g / cm3, ncomponents = 1, kStateSolid,
115 293 * kelvin, 1 * atmosphere);
116 graphite->AddElement(C, natoms = 1);
117
118 // example of vacuum
119 fWorldMaterial = new G4Material("Galactic", 1, 1.01 * g / mole, universe_mean_density, kStateGas,
120 2.73 * kelvin, 3.e-18 * pascal);
121
122 /// G4cout << *(G4Material::GetMaterialTable()) << G4endl;
123 }
124
125 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
126
127 G4Material* DetectorConstruction::MaterialWithSingleIsotope(G4String name, G4String symbol,
128 G4double density, G4int Z, G4int A)
129 {
130 // define a material from an isotope
131 //
132 G4int ncomponents;
133 G4double abundance, massfraction;
134
135 G4Isotope* isotope = new G4Isotope(symbol, Z, A);
136
137 G4Element* element = new G4Element(name, symbol, ncomponents = 1);
138 element->AddIsotope(isotope, abundance = 100. * perCent);
139
140 G4Material* material = new G4Material(name, density, ncomponents = 1);
141 material->AddElement(element, massfraction = 100. * perCent);
142
143 return material;
144 }
145
146 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
147
148 G4VPhysicalVolume* DetectorConstruction::ConstructVolumes()
149 {
150 // Cleanup old geometry
151 G4GeometryManager::GetInstance()->OpenGeometry();
152 G4PhysicalVolumeStore::GetInstance()->Clean();
153 G4LogicalVolumeStore::GetInstance()->Clean();
154 G4SolidStore::GetInstance()->Clean();
155
156 // World
157 //
158 fWorldSizeX = 1.2 * fAbsorThickness;
159 fWorldSizeYZ = 1.2 * fAbsorSizeYZ;
160
161 G4Box* sWorld = new G4Box("World", // name
162 fWorldSizeX / 2, fWorldSizeYZ / 2, fWorldSizeYZ / 2); // dimensions
163
164 G4LogicalVolume* lWorld = new G4LogicalVolume(sWorld, // shape
165 fWorldMaterial, // material
166 "World"); // name
167
168 fWorldVolume = new G4PVPlacement(0, // no rotation
169 G4ThreeVector(), // at (0,0,0)
170 lWorld, // logical volume
171 "World", // name
172 0, // mother volume
173 false, // no boolean operation
174 0); // copy number
175
176 // Absorber
177 //
178 G4Box* sAbsor = new G4Box("Absorber", // name
179 fAbsorThickness / 2, fAbsorSizeYZ / 2, fAbsorSizeYZ / 2); // dimensions
180
181 fLAbsor = new G4LogicalVolume(sAbsor, // shape
182 fAbsorMaterial, // material
183 fAbsorMaterial->GetName()); // name
184
185 new G4PVPlacement(0, // no rotation
186 G4ThreeVector(), // at (0,0,0)
187 fLAbsor, // logical volume
188 fAbsorMaterial->GetName(), // name
189 lWorld, // mother volume
190 false, // no boolean operation
191 0); // copy number
192
193 PrintParameters();
194
195 // always return the root volume
196 //
197 return fWorldVolume;
198 }
199
200 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
201
202 void DetectorConstruction::PrintParameters()
203 {
204 G4cout << "\n The Absorber is " << G4BestUnit(fAbsorThickness, "Length") << " of "
205 << fAbsorMaterial->GetName() << "\n \n"
206 << fAbsorMaterial << G4endl;
207 }
208
209 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
210
211 void DetectorConstruction::SetAbsorMaterial(G4String materialChoice)
212 {
213 // search the material by its name
214 G4Material* pttoMaterial = G4NistManager::Instance()->FindOrBuildMaterial(materialChoice);
215
216 if (pttoMaterial) {
217 fAbsorMaterial = pttoMaterial;
218 if (fLAbsor) {
219 fLAbsor->SetMaterial(fAbsorMaterial);
220 }
221 G4RunManager::GetRunManager()->PhysicsHasBeenModified();
222 }
223 else {
224 G4cout << "\n--> warning from DetectorConstruction::SetMaterial : " << materialChoice
225 << " not found" << G4endl;
226 }
227 }
228
229 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
230
231 void DetectorConstruction::SetAbsorThickness(G4double value)
232 {
233 fAbsorThickness = value;
234 G4RunManager::GetRunManager()->ReinitializeGeometry();
235 }
236
237 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
238
239 void DetectorConstruction::SetAbsorSizeYZ(G4double value)
240 {
241 fAbsorSizeYZ = value;
242 G4RunManager::GetRunManager()->ReinitializeGeometry();
243 }
244
245 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
246