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Geant4/examples/extended/analysis/B1Con/src/DetectorConstruction.cc

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  1 //
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 26 //
 27 /// \file B1/src/DetectorConstruction.cc
 28 /// \brief Implementation of the B1::DetectorConstruction class
 29 
 30 #include "DetectorConstruction.hh"
 31 
 32 #include "G4Box.hh"
 33 #include "G4Cons.hh"
 34 #include "G4LogicalVolume.hh"
 35 #include "G4NistManager.hh"
 36 #include "G4Orb.hh"
 37 #include "G4PVPlacement.hh"
 38 #include "G4RunManager.hh"
 39 #include "G4Sphere.hh"
 40 #include "G4SystemOfUnits.hh"
 41 #include "G4Trd.hh"
 42 
 43 namespace B1
 44 {
 45 
 46 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 47 
 48 G4VPhysicalVolume* DetectorConstruction::Construct()
 49 {
 50   // Get nist material manager
 51   G4NistManager* nist = G4NistManager::Instance();
 52 
 53   // Envelope parameters
 54   //
 55   G4double env_sizeXY = 20 * cm, env_sizeZ = 30 * cm;
 56   G4Material* env_mat = nist->FindOrBuildMaterial("G4_WATER");
 57 
 58   // Option to switch on/off checking of volumes overlaps
 59   //
 60   G4bool checkOverlaps = true;
 61 
 62   //
 63   // World
 64   //
 65   G4double world_sizeXY = 1.2 * env_sizeXY;
 66   G4double world_sizeZ = 1.2 * env_sizeZ;
 67   G4Material* world_mat = nist->FindOrBuildMaterial("G4_AIR");
 68 
 69   auto solidWorld =
 70     new G4Box("World",  // its name
 71               0.5 * world_sizeXY, 0.5 * world_sizeXY, 0.5 * world_sizeZ);  // its size
 72 
 73   auto logicWorld = new G4LogicalVolume(solidWorld,  // its solid
 74                                         world_mat,  // its material
 75                                         "World");  // its name
 76 
 77   auto physWorld = new G4PVPlacement(nullptr,  // no rotation
 78                                      G4ThreeVector(),  // at (0,0,0)
 79                                      logicWorld,  // its logical volume
 80                                      "World",  // its name
 81                                      nullptr,  // its mother  volume
 82                                      false,  // no boolean operation
 83                                      0,  // copy number
 84                                      checkOverlaps);  // overlaps checking
 85 
 86   //
 87   // Envelope
 88   //
 89   auto solidEnv = new G4Box("Envelope",  // its name
 90                             0.5 * env_sizeXY, 0.5 * env_sizeXY, 0.5 * env_sizeZ);  // its size
 91 
 92   auto logicEnv = new G4LogicalVolume(solidEnv,  // its solid
 93                                       env_mat,  // its material
 94                                       "Envelope");  // its name
 95 
 96   new G4PVPlacement(nullptr,  // no rotation
 97                     G4ThreeVector(),  // at (0,0,0)
 98                     logicEnv,  // its logical volume
 99                     "Envelope",  // its name
100                     logicWorld,  // its mother  volume
101                     false,  // no boolean operation
102                     0,  // copy number
103                     checkOverlaps);  // overlaps checking
104 
105   //
106   // Shape 1
107   //
108   G4Material* shape1_mat = nist->FindOrBuildMaterial("G4_A-150_TISSUE");
109   G4ThreeVector pos1 = G4ThreeVector(0, 2 * cm, -7 * cm);
110 
111   // Conical section shape
112   G4double shape1_rmina = 0. * cm, shape1_rmaxa = 2. * cm;
113   G4double shape1_rminb = 0. * cm, shape1_rmaxb = 4. * cm;
114   G4double shape1_hz = 3. * cm;
115   G4double shape1_phimin = 0. * deg, shape1_phimax = 360. * deg;
116   auto solidShape1 = new G4Cons("Shape1", shape1_rmina, shape1_rmaxa, shape1_rminb, shape1_rmaxb,
117                                 shape1_hz, shape1_phimin, shape1_phimax);
118 
119   auto logicShape1 = new G4LogicalVolume(solidShape1,  // its solid
120                                          shape1_mat,  // its material
121                                          "Shape1");  // its name
122 
123   new G4PVPlacement(nullptr,  // no rotation
124                     pos1,  // at position
125                     logicShape1,  // its logical volume
126                     "Shape1",  // its name
127                     logicEnv,  // its mother  volume
128                     false,  // no boolean operation
129                     0,  // copy number
130                     checkOverlaps);  // overlaps checking
131 
132   //
133   // Shape 2
134   //
135   G4Material* shape2_mat = nist->FindOrBuildMaterial("G4_BONE_COMPACT_ICRU");
136   G4ThreeVector pos2 = G4ThreeVector(0, -1 * cm, 7 * cm);
137 
138   // Trapezoid shape
139   G4double shape2_dxa = 12 * cm, shape2_dxb = 12 * cm;
140   G4double shape2_dya = 10 * cm, shape2_dyb = 16 * cm;
141   G4double shape2_dz = 6 * cm;
142   auto solidShape2 =
143     new G4Trd("Shape2",  // its name
144               0.5 * shape2_dxa, 0.5 * shape2_dxb, 0.5 * shape2_dya, 0.5 * shape2_dyb,
145               0.5 * shape2_dz);  // its size
146 
147   auto logicShape2 = new G4LogicalVolume(solidShape2,  // its solid
148                                          shape2_mat,  // its material
149                                          "Shape2");  // its name
150 
151   new G4PVPlacement(nullptr,  // no rotation
152                     pos2,  // at position
153                     logicShape2,  // its logical volume
154                     "Shape2",  // its name
155                     logicEnv,  // its mother  volume
156                     false,  // no boolean operation
157                     0,  // copy number
158                     checkOverlaps);  // overlaps checking
159 
160   // Set Shape2 as scoring volume
161   //
162   fScoringVolume = logicShape2;
163 
164   //
165   // always return the physical World
166   //
167   return physWorld;
168 }
169 
170 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
171 
172 }  // namespace B1
173