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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 "G4Tubs.hh"
50 #include "G4UnitsTable.hh"
51
52 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
53
54 DetectorConstruction::DetectorConstruction()
55 {
56 fAbsorRadius = 15 * mm;
57 fAbsorLength = 60 * mm;
58 fContainThickness = 2.4 * mm;
59 DefineMaterials();
60 SetAbsorMaterial("BeO");
61 SetContainMaterial("Stainless-Steel");
62 fDetectorMessenger = new DetectorMessenger(this);
63 }
64
65 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
66
67 DetectorConstruction::~DetectorConstruction()
68 {
69 delete fDetectorMessenger;
70 }
71
72 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
73
74 G4VPhysicalVolume* DetectorConstruction::Construct()
75 {
76 return ConstructVolumes();
77 }
78
79 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
80
81 void DetectorConstruction::DefineMaterials()
82 {
83 G4int ncomponents, natoms;
84
85 G4Element* Be = new G4Element("Beryllium", "Be", 4., 9.01 * g / mole);
86 G4Element* N = new G4Element("Nitrogen", "N", 7., 14.01 * g / mole);
87 G4Element* O = new G4Element("Oxygen", "O", 8., 16.00 * g / mole);
88 G4Element* Cr = new G4Element("Chromium", "Cr", 24., 51.99 * g / mole);
89 G4Element* Fe = new G4Element("Iron", "Fe", 26., 55.84 * g / mole);
90 G4Element* Ni = new G4Element("Nickel", "Ni", 28., 58.69 * g / mole);
91
92 G4Material* BeO = new G4Material("BeO", 3.05 * g / cm3, ncomponents = 2);
93 BeO->AddElement(Be, natoms = 1);
94 BeO->AddElement(O, natoms = 1);
95
96 G4Material* inox = new G4Material("Stainless-Steel", 8 * g / cm3, ncomponents = 3);
97 inox->AddElement(Fe, 74 * perCent);
98 inox->AddElement(Cr, 18 * perCent);
99 inox->AddElement(Ni, 8 * perCent);
100
101 G4Material* Air = new G4Material("Air", 1.290 * mg / cm3, ncomponents = 2);
102 Air->AddElement(N, 70. * perCent);
103 Air->AddElement(O, 30. * perCent);
104
105 fWorldMaterial = Air;
106
107 /// G4cout << *(G4Material::GetMaterialTable()) << G4endl;
108 }
109
110 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
111
112 G4Material* DetectorConstruction::MaterialWithSingleIsotope(G4String name, G4String symbol,
113 G4double density, G4int Z, G4int A)
114 {
115 // define a material from an isotope
116 //
117 G4int ncomponents;
118 G4double abundance, massfraction;
119
120 G4Isotope* isotope = new G4Isotope(symbol, Z, A);
121
122 G4Element* element = new G4Element(name, symbol, ncomponents = 1);
123 element->AddIsotope(isotope, abundance = 100. * perCent);
124
125 G4Material* material = new G4Material(name, density, ncomponents = 1);
126 material->AddElement(element, massfraction = 100. * perCent);
127
128 return material;
129 }
130
131 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
132
133 G4VPhysicalVolume* DetectorConstruction::ConstructVolumes()
134 {
135 // Cleanup old geometry
136 G4GeometryManager::GetInstance()->OpenGeometry();
137 G4PhysicalVolumeStore::GetInstance()->Clean();
138 G4LogicalVolumeStore::GetInstance()->Clean();
139 G4SolidStore::GetInstance()->Clean();
140
141 // compute dimensions
142 G4double ContainRadius = fAbsorRadius + fContainThickness;
143 G4double ContainLength = fAbsorLength + 2 * fContainThickness;
144
145 G4double WorldSizeXY = 2.4 * ContainRadius;
146 G4double WorldSizeZ = 1.2 * ContainLength;
147
148 // World
149 //
150 G4Box* sWorld = new G4Box("World", // name
151 0.5 * WorldSizeXY, 0.5 * WorldSizeXY, 0.5 * WorldSizeZ); // dimensions
152
153 G4LogicalVolume* lWorld = new G4LogicalVolume(sWorld, // shape
154 fWorldMaterial, // material
155 "World"); // name
156
157 fPWorld = new G4PVPlacement(0, // no rotation
158 G4ThreeVector(), // at (0,0,0)
159 lWorld, // logical volume
160 "World", // name
161 0, // mother volume
162 false, // no boolean operation
163 0); // copy number
164
165 // Container
166 //
167 G4Tubs* sContain = new G4Tubs("Container", // name
168 0., ContainRadius, 0.5 * ContainLength, 0., twopi); // dimensions
169
170 fLContain = new G4LogicalVolume(sContain, // shape
171 fContainMaterial, // material
172 fContainMaterial->GetName()); // name
173
174 new G4PVPlacement(0, // no rotation
175 G4ThreeVector(), // at (0,0,0)
176 fLContain, // logical volume
177 fContainMaterial->GetName(), // name
178 lWorld, // mother volume
179 false, // no boolean operation
180 0); // copy number
181
182 // Absorber
183 //
184 G4Tubs* sAbsor = new G4Tubs("Absorber", // name
185 0., fAbsorRadius, 0.5 * fAbsorLength, 0., twopi); // dimensions
186
187 fLAbsor = new G4LogicalVolume(sAbsor, // shape
188 fAbsorMaterial, // material
189 fAbsorMaterial->GetName()); // name
190
191 new G4PVPlacement(0, // no rotation
192 G4ThreeVector(), // at (0,0,0)
193 fLAbsor, // logical volume
194 fAbsorMaterial->GetName(), // name
195 fLContain, // mother volume
196 false, // no boolean operation
197 0); // copy number
198
199 PrintParameters();
200
201 // always return the root volume
202 //
203 return fPWorld;
204 }
205
206 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
207
208 void DetectorConstruction::PrintParameters()
209 {
210 G4cout << "\n The Absorber is a cylinder of " << fAbsorMaterial->GetName()
211 << " radius = " << G4BestUnit(fAbsorRadius, "Length")
212 << " length = " << G4BestUnit(fAbsorLength, "Length") << G4endl;
213 G4cout << " The Container is a cylinder of " << fContainMaterial->GetName()
214 << " thickness = " << G4BestUnit(fContainThickness, "Length") << G4endl;
215
216 G4cout << "\n" << fAbsorMaterial << G4endl;
217 G4cout << "\n" << fContainMaterial << G4endl;
218 }
219
220 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
221
222 void DetectorConstruction::SetAbsorMaterial(G4String materialChoice)
223 {
224 // search the material by its name
225 G4Material* pttoMaterial = G4NistManager::Instance()->FindOrBuildMaterial(materialChoice);
226
227 if (pttoMaterial) {
228 fAbsorMaterial = pttoMaterial;
229 if (fLAbsor) {
230 fLAbsor->SetMaterial(fAbsorMaterial);
231 }
232 G4RunManager::GetRunManager()->PhysicsHasBeenModified();
233 }
234 else {
235 G4cout << "\n--> warning from DetectorConstruction::SetAbsorMaterial : " << materialChoice
236 << " not found" << G4endl;
237 }
238 }
239
240 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
241
242 void DetectorConstruction::SetContainMaterial(G4String materialChoice)
243 {
244 // search the material by its name
245 G4Material* pttoMaterial = G4NistManager::Instance()->FindOrBuildMaterial(materialChoice);
246
247 if (pttoMaterial) {
248 fContainMaterial = pttoMaterial;
249 if (fLContain) {
250 fLContain->SetMaterial(fContainMaterial);
251 }
252 G4RunManager::GetRunManager()->PhysicsHasBeenModified();
253 }
254 else {
255 G4cout << "\n--> warning from DetectorConstruction::SetContainMaterial : " << materialChoice
256 << " not found" << G4endl;
257 }
258 }
259
260 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
261
262 void DetectorConstruction::SetAbsorRadius(G4double value)
263 {
264 fAbsorRadius = value;
265 G4RunManager::GetRunManager()->ReinitializeGeometry();
266 }
267
268 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
269
270 void DetectorConstruction::SetAbsorLength(G4double value)
271 {
272 fAbsorLength = value;
273 G4RunManager::GetRunManager()->ReinitializeGeometry();
274 }
275
276 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
277
278 void DetectorConstruction::SetContainThickness(G4double value)
279 {
280 fContainThickness = value;
281 G4RunManager::GetRunManager()->ReinitializeGeometry();
282 }
283
284 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
285