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25 //
26 /// \file medical/fanoCavity/src/DetectorConstruction.cc
27 /// \brief Implementation of the DetectorConstruction class
28 //
29
30 //
31 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
32 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
33
34 #include "DetectorConstruction.hh"
35
36 #include "DetectorMessenger.hh"
37
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 "G4SolidStore.hh"
47 #include "G4SystemOfUnits.hh"
48 #include "G4Tubs.hh"
49 #include "G4UnitsTable.hh"
50 #include "G4VPhysicalVolume.hh"
51
52 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
53
54 DetectorConstruction::DetectorConstruction() : fWall(nullptr), fCavity(nullptr)
55 {
56 // default parameter values
57 fCavityThickness = 2 * mm;
58 fCavityRadius = 1 * cm;
59
60 fWallThickness = 5 * mm;
61
62 DefineMaterials();
63 SetWallMaterial("G4_WATER");
64 SetCavityMaterial("g4Water_gas");
65
66 // create commands for interactive definition of the detector
67 fDetectorMessenger = new DetectorMessenger(this);
68 }
69
70 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
71
72 DetectorConstruction::~DetectorConstruction()
73 {
74 delete fDetectorMessenger;
75 }
76
77 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
78
79 void DetectorConstruction::DefineMaterials()
80 {
81 G4double z, a;
82
83 G4Element* H = new G4Element("Hydrogen", "H", z = 1., a = 1.01 * g / mole);
84 G4Element* O = new G4Element("Oxygen", "O", z = 8., a = 16.00 * g / mole);
85
86 G4Material* H2O = new G4Material("Water", 1.0 * g / cm3, 2);
87 H2O->AddElement(H, 2);
88 H2O->AddElement(O, 1);
89 H2O->GetIonisation()->SetMeanExcitationEnergy(78.0 * eV);
90
91 G4Material* gas = new G4Material("Water_gas", 1.0 * mg / cm3, 2);
92 gas->AddElement(H, 2);
93 gas->AddElement(O, 1);
94 gas->GetIonisation()->SetMeanExcitationEnergy(78.0 * eV);
95
96 new G4Material("Graphite", 6, 12.01 * g / mole, 2.265 * g / cm3);
97 new G4Material("Graphite_gas", 6, 12.01 * g / mole, 2.265 * mg / cm3);
98
99 new G4Material("Aluminium", 13, 26.98 * g / mole, 2.700 * g / cm3);
100 new G4Material("Aluminium_gas", 13, 26.98 * g / mole, 2.700 * mg / cm3);
101
102 // alternatively, use G4 data base
103 //
104 G4NistManager* nist = G4NistManager::Instance();
105
106 nist->FindOrBuildMaterial("G4_WATER");
107 nist->BuildMaterialWithNewDensity("g4Water_gas", "G4_WATER", 1.0 * mg / cm3);
108
109 // printout
110 G4cout << *(G4Material::GetMaterialTable()) << G4endl;
111 }
112
113 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
114
115 G4VPhysicalVolume* DetectorConstruction::Construct()
116 {
117 if (fWall) {
118 return fWall;
119 }
120
121 // Chamber
122 //
123 fTotalThickness = fCavityThickness + 2 * fWallThickness;
124 fWallRadius = fCavityRadius + fWallThickness;
125
126 G4Tubs* sChamber = new G4Tubs("Chamber", // name
127 0., fWallRadius, 0.5 * fTotalThickness, 0., twopi); // size
128
129 G4LogicalVolume* lChamber = new G4LogicalVolume(sChamber, // solid
130 fWallMaterial, // material
131 "Chamber"); // name
132
133 fWall = new G4PVPlacement(0, // no rotation
134 G4ThreeVector(), // at (0,0,0)
135 lChamber, // logical volume
136 "Wall", // name
137 0, // mother volume
138 false, // no boolean operation
139 0); // copy number
140
141 // Cavity
142 //
143 G4Tubs* sCavity = new G4Tubs("Cavity", 0., fCavityRadius, 0.5 * fCavityThickness, 0., twopi);
144
145 G4LogicalVolume* lCavity = new G4LogicalVolume(sCavity, // shape
146 fCavityMaterial, // material
147 "Cavity"); // name
148
149 fCavity = new G4PVPlacement(0, // no rotation
150 G4ThreeVector(), // at (0,0,0)
151 lCavity, // logical volume
152 "Cavity", // name
153 lChamber, // mother volume
154 false, // no boolean operation
155 1); // copy number
156
157 PrintParameters();
158
159 //
160 // always return the root volume
161 //
162 return fWall;
163 }
164
165 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
166
167 void DetectorConstruction::PrintParameters()
168 {
169 G4cout << "\n---------------------------------------------------------\n";
170 G4cout << "---> The Wall is " << G4BestUnit(fWallThickness, "Length") << " of "
171 << fWallMaterial->GetName() << " ( "
172 << G4BestUnit(fWallMaterial->GetDensity(), "Volumic Mass") << " )\n";
173 G4cout << " The Cavity is " << G4BestUnit(fCavityThickness, "Length") << " of "
174 << fCavityMaterial->GetName() << " ( "
175 << G4BestUnit(fCavityMaterial->GetDensity(), "Volumic Mass") << " )";
176 G4cout << "\n---------------------------------------------------------\n";
177 G4cout << G4endl;
178 }
179
180 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
181
182 void DetectorConstruction::SetWallThickness(G4double value)
183 {
184 fWallThickness = value;
185 }
186
187 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
188
189 void DetectorConstruction::SetWallMaterial(const G4String& materialChoice)
190 {
191 // search the material by its name
192 G4Material* pttoMaterial = G4Material::GetMaterial(materialChoice);
193 if (pttoMaterial) fWallMaterial = pttoMaterial;
194 }
195
196 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
197
198 void DetectorConstruction::SetCavityThickness(G4double value)
199 {
200 fCavityThickness = value;
201 }
202
203 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
204
205 void DetectorConstruction::SetCavityRadius(G4double value)
206 {
207 fCavityRadius = value;
208 }
209
210 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
211
212 void DetectorConstruction::SetCavityMaterial(const G4String& materialChoice)
213 {
214 // search the material by its name
215 G4Material* pttoMaterial = G4Material::GetMaterial(materialChoice);
216 if (pttoMaterial) fCavityMaterial = pttoMaterial;
217 }
218
219 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
220