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26 //
27 /// \file B4/B4a/src/DetectorConstruction.cc
28 /// \brief Implementation of the B4::DetectorC
29
30 #include "DetectorConstruction.hh"
31
32 #include "G4AutoDelete.hh"
33 #include "G4Box.hh"
34 #include "G4Colour.hh"
35 #include "G4GlobalMagFieldMessenger.hh"
36 #include "G4LogicalVolume.hh"
37 #include "G4Material.hh"
38 #include "G4NistManager.hh"
39 #include "G4PVPlacement.hh"
40 #include "G4PVReplica.hh"
41 #include "G4PhysicalConstants.hh"
42 #include "G4SystemOfUnits.hh"
43 #include "G4VisAttributes.hh"
44
45 namespace B4
46 {
47
48 //....oooOO0OOooo........oooOO0OOooo........oo
49
50 G4ThreadLocal G4GlobalMagFieldMessenger* Detec
51
52 //....oooOO0OOooo........oooOO0OOooo........oo
53
54 G4VPhysicalVolume* DetectorConstruction::Const
55 {
56 // Define materials
57 DefineMaterials();
58
59 // Define volumes
60 return DefineVolumes();
61 }
62
63 //....oooOO0OOooo........oooOO0OOooo........oo
64
65 void DetectorConstruction::DefineMaterials()
66 {
67 // Lead material defined using NIST Manager
68 auto nistManager = G4NistManager::Instance()
69 nistManager->FindOrBuildMaterial("G4_Pb");
70
71 // Liquid argon material
72 G4double a; // mass of a mole;
73 G4double z; // z=mean number of protons;
74 G4double density;
75 new G4Material("liquidArgon", z = 18., a = 3
76 // The argon by NIST Manager is a gas with a
77
78 // Vacuum
79 new G4Material("Galactic", z = 1., a = 1.01
80 kStateGas, 2.73 * kelvin, 3.e
81
82 // Print materials
83 G4cout << *(G4Material::GetMaterialTable())
84 }
85
86 //....oooOO0OOooo........oooOO0OOooo........oo
87
88 G4VPhysicalVolume* DetectorConstruction::Defin
89 {
90 // Geometry parameters
91 G4int nofLayers = 10;
92 G4double absoThickness = 10. * mm;
93 G4double gapThickness = 5. * mm;
94 G4double calorSizeXY = 10. * cm;
95
96 auto layerThickness = absoThickness + gapThi
97 auto calorThickness = nofLayers * layerThick
98 auto worldSizeXY = 1.2 * calorSizeXY;
99 auto worldSizeZ = 1.2 * calorThickness;
100
101 // Get materials
102 auto defaultMaterial = G4Material::GetMateri
103 auto absorberMaterial = G4Material::GetMater
104 auto gapMaterial = G4Material::GetMaterial("
105
106 if (!defaultMaterial || !absorberMaterial ||
107 G4ExceptionDescription msg;
108 msg << "Cannot retrieve materials already
109 G4Exception("DetectorConstruction::DefineV
110 }
111
112 //
113 // World
114 //
115 auto worldS = new G4Box("World", // its nam
116 worldSizeXY / 2, wor
117
118 auto worldLV = new G4LogicalVolume(worldS,
119 defaultMa
120 "World");
121
122 auto worldPV = new G4PVPlacement(nullptr, /
123 G4ThreeVect
124 worldLV, /
125 "World", /
126 nullptr, /
127 false, //
128 0, // copy
129 fCheckOverl
130
131 //
132 // Calorimeter
133 //
134 auto calorimeterS = new G4Box("Calorimeter",
135 calorSizeXY /
136
137 auto calorLV = new G4LogicalVolume(calorimet
138 defaultMa
139 "Calorime
140
141 new G4PVPlacement(nullptr, // no rotation
142 G4ThreeVector(), // at (0
143 calorLV, // its logical v
144 "Calorimeter", // its nam
145 worldLV, // its mother v
146 false, // no boolean oper
147 0, // copy number
148 fCheckOverlaps); // check
149
150 //
151 // Layer
152 //
153 auto layerS = new G4Box("Layer", // its nam
154 calorSizeXY / 2, cal
155
156 auto layerLV = new G4LogicalVolume(layerS,
157 defaultMa
158 "Layer");
159
160 new G4PVReplica("Layer", // its name
161 layerLV, // its logical vol
162 calorLV, // its mother
163 kZAxis, // axis of replicat
164 nofLayers, // number of rep
165 layerThickness); // witdth
166
167 //
168 // Absorber
169 //
170 auto absorberS = new G4Box("Abso", // its n
171 calorSizeXY / 2,
172
173 auto absorberLV = new G4LogicalVolume(absorb
174 absorb
175 "Abso"
176
177 fAbsorberPV = new G4PVPlacement(nullptr, //
178 G4ThreeVecto
179 absorberLV,
180 "Abso", //
181 layerLV, //
182 false, // n
183 0, // copy
184 fCheckOverla
185
186 //
187 // Gap
188 //
189 auto gapS = new G4Box("Gap", // its name
190 calorSizeXY / 2, calor
191
192 auto gapLV = new G4LogicalVolume(gapS, // i
193 gapMaterial
194 "Gap"); //
195
196 fGapPV = new G4PVPlacement(nullptr, // no r
197 G4ThreeVector(0.,
198 gapLV, // its lo
199 "Gap", // its na
200 layerLV, // its
201 false, // no boo
202 0, // copy numbe
203 fCheckOverlaps);
204
205 //
206 // print parameters
207 //
208 G4cout << G4endl << "-----------------------
209 << "---> The calorimeter is " << nofL
210 << "mm of " << absorberMaterial->GetN
211 << gapMaterial->GetName() << " ] " <<
212 << "---------------------------------
213
214 //
215 // Visualization attributes
216 //
217 worldLV->SetVisAttributes(G4VisAttributes::G
218 calorLV->SetVisAttributes(G4VisAttributes(G4
219
220 //
221 // Always return the physical World
222 //
223 return worldPV;
224 }
225
226 //....oooOO0OOooo........oooOO0OOooo........oo
227
228 void DetectorConstruction::ConstructSDandField
229 {
230 // Create global magnetic field messenger.
231 // Uniform magnetic field is then created au
232 // the field value is not zero.
233 G4ThreeVector fieldValue;
234 fMagFieldMessenger = new G4GlobalMagFieldMes
235 fMagFieldMessenger->SetVerboseLevel(1);
236
237 // Register the field messenger for deleting
238 G4AutoDelete::Register(fMagFieldMessenger);
239 }
240
241 //....oooOO0OOooo........oooOO0OOooo........oo
242
243 } // namespace B4
244