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25 //
26 /// \file electromagnetic/TestEm6/src/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 "G4PhysicalVolumeStore.hh"
45 #include "G4RunManager.hh"
46 #include "G4SolidStore.hh"
47 #include "G4SystemOfUnits.hh"
48 #include "G4UniformMagField.hh"
49 #include "G4UnitsTable.hh"
50 #include "G4UserLimits.hh"
51
52 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
53
54 DetectorConstruction::DetectorConstruction()
55 : G4VUserDetectorConstruction(),
56 fP_Box(0),
57 fL_Box(0),
58 fBoxSize(500 * m),
59 fMaterial(0),
60 fMagField(0),
61 fUserLimits(0),
62 fDetectorMessenger(0)
63 {
64 DefineMaterials();
65 SetMaterial("Iron");
66
67 // create UserLimits
68 fUserLimits = new G4UserLimits();
69
70 // create commands for interactive definition of the detector
71 fDetectorMessenger = new DetectorMessenger(this);
72 }
73
74 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
75
76 DetectorConstruction::~DetectorConstruction()
77 {
78 delete fDetectorMessenger;
79 }
80
81 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
82
83 G4VPhysicalVolume* DetectorConstruction::Construct()
84 {
85 return ConstructVolumes();
86 }
87
88 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
89
90 void DetectorConstruction::DefineMaterials()
91 {
92 G4double a, z, density;
93
94 new G4Material("Beryllium", z = 4., a = 9.012182 * g / mole, density = 1.848 * g / cm3);
95 new G4Material("Carbon", z = 6., a = 12.011 * g / mole, density = 2.265 * g / cm3);
96 new G4Material("Iron", z = 26., a = 55.85 * g / mole, density = 7.870 * g / cm3);
97
98 G4cout << *(G4Material::GetMaterialTable()) << G4endl;
99 }
100
101 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
102
103 G4VPhysicalVolume* DetectorConstruction::ConstructVolumes()
104 {
105 G4GeometryManager::GetInstance()->OpenGeometry();
106 G4PhysicalVolumeStore::GetInstance()->Clean();
107 G4LogicalVolumeStore::GetInstance()->Clean();
108 G4SolidStore::GetInstance()->Clean();
109
110 G4Box* sBox = new G4Box("Container", // its name
111 fBoxSize / 2, fBoxSize / 2, fBoxSize / 2); // its dimensions
112
113 fL_Box = new G4LogicalVolume(sBox, // its shape
114 fMaterial, // its material
115 fMaterial->GetName()); // its name
116
117 fL_Box->SetUserLimits(fUserLimits);
118
119 fP_Box = new G4PVPlacement(0, // no rotation
120 G4ThreeVector(), // at (0,0,0)
121 fL_Box, // its logical volume
122 fMaterial->GetName(), // its name
123 0, // its mother volume
124 false, // no boolean operation
125 0); // copy number
126
127 PrintParameters();
128
129 //
130 // always return the root volume
131 //
132 return fP_Box;
133 }
134
135 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
136
137 void DetectorConstruction::PrintParameters()
138 {
139 G4cout << "\n The Box is " << G4BestUnit(fBoxSize, "Length") << " of " << fMaterial->GetName()
140 << G4endl;
141 }
142
143 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
144
145 void DetectorConstruction::SetMaterial(const G4String& name)
146 {
147 G4cout << "###SetMaterial" << G4endl;
148
149 // get the pointer to the existing material
150 G4Material* mat = G4Material::GetMaterial(name, false);
151
152 // create the material by its name
153 if (!mat) {
154 mat = G4NistManager::Instance()->FindOrBuildMaterial(name);
155 }
156
157 if (mat && mat != fMaterial) {
158 G4cout << "### New target material: " << mat->GetName() << G4endl;
159 fMaterial = mat;
160 if (fL_Box) {
161 fL_Box->SetMaterial(mat);
162 G4RunManager::GetRunManager()->PhysicsHasBeenModified();
163 }
164 }
165 }
166
167 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
168
169 void DetectorConstruction::SetSize(G4double value)
170 {
171 fBoxSize = value;
172 }
173
174 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
175
176 #include "G4FieldManager.hh"
177 #include "G4TransportationManager.hh"
178
179 void DetectorConstruction::SetMagField(G4double fieldValue)
180 {
181 // apply a global uniform magnetic field along Z axis
182 G4FieldManager* fieldMgr = G4TransportationManager::GetTransportationManager()->GetFieldManager();
183
184 if (fMagField) delete fMagField; // delete the existing magn field
185
186 if (fieldValue != 0.) // create a new one if non nul
187 {
188 fMagField = new G4UniformMagField(G4ThreeVector(0., 0., fieldValue));
189 fieldMgr->SetDetectorField(fMagField);
190 fieldMgr->CreateChordFinder(fMagField);
191 }
192 else {
193 fMagField = 0;
194 fieldMgr->SetDetectorField(fMagField);
195 }
196 }
197
198 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
199
200 void DetectorConstruction::SetMaxStepSize(G4double val)
201 {
202 // set the maximum allowed step size
203 //
204 if (val <= DBL_MIN) {
205 G4cout << "\n --->warning from SetMaxStepSize: maxStep " << val
206 << " out of range. Command refused" << G4endl;
207 return;
208 }
209 fUserLimits->SetMaxAllowedStep(val);
210 }
211
212 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
213
214 #include "G4RunManager.hh"
215
216 void DetectorConstruction::UpdateGeometry()
217 {
218 G4RunManager::GetRunManager()->DefineWorldVolume(ConstructVolumes());
219 }
220
221 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
222