B1/src/DetectorConstruction.cc

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0025 //
0026 /// \file DetectorConstruction.cc
0027 /// \brief Implementation of the B1::DetectorConstruction class
0028
0029 #include "DetectorConstruction.hh"
0030
0031 #include "G4Box.hh"
0032 #include "G4Cons.hh"
0033 #include "G4LogicalVolume.hh"
0034 #include "G4NistManager.hh"
0035 #include "G4PVPlacement.hh"
0036 #include "G4SystemOfUnits.hh"
0037 #include "G4Trd.hh"
0038
0039 namespace B1
0040 {
0041
0042 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0043
0044 G4VPhysicalVolume* DetectorConstruction::Construct()
0045 {
0046   // Get nist material manager
0047   G4NistManager* nist = G4NistManager::Instance();
0048
0049   // Envelope parameters
0050   //
0051   G4double env_sizeXY = 20 * cm, env_sizeZ = 30 * cm;
0052   G4Material* env_mat = nist->FindOrBuildMaterial("G4_WATER");
0053
0054   // Option to switch on/off checking of volumes overlaps
0055   //
0056   G4bool checkOverlaps = true;
0057
0058   //
0059   // World
0060   //
0061   G4double world_sizeXY = 1.2 * env_sizeXY;
0062   G4double world_sizeZ = 1.2 * env_sizeZ;
0063   G4Material* world_mat = nist->FindOrBuildMaterial("G4_AIR");
0064
0065   auto solidWorld =
0066     new G4Box("World",  // its name
0067               0.5 * world_sizeXY, 0.5 * world_sizeXY, 0.5 * world_sizeZ);  // its size
0068
0069   auto logicWorld = new G4LogicalVolume(solidWorld,  // its solid
0070                                         world_mat,  // its material
0071                                         "World");  // its name
0072
0073   auto physWorld = new G4PVPlacement(nullptr,  // no rotation
0074                                      G4ThreeVector(),  // at (0,0,0)
0075                                      logicWorld,  // its logical volume
0076                                      "World",  // its name
0077                                      nullptr,  // its mother  volume
0078                                      false,  // no boolean operation
0079                                      0,  // copy number
0080                                      checkOverlaps);  // overlaps checking
0081
0082   //
0083   // Envelope
0084   //
0085   auto solidEnv = new G4Box("Envelope",  // its name
0086                             0.5 * env_sizeXY, 0.5 * env_sizeXY, 0.5 * env_sizeZ);  // its size
0087
0088   auto logicEnv = new G4LogicalVolume(solidEnv,  // its solid
0089                                       env_mat,  // its material
0090                                       "Envelope");  // its name
0091
0092   new G4PVPlacement(nullptr,  // no rotation
0093                     G4ThreeVector(),  // at (0,0,0)
0094                     logicEnv,  // its logical volume
0095                     "Envelope",  // its name
0096                     logicWorld,  // its mother  volume
0097                     false,  // no boolean operation
0098                     0,  // copy number
0099                     checkOverlaps);  // overlaps checking
0100
0101   //
0102   // Shape 1
0103   //
0104   G4Material* shape1_mat = nist->FindOrBuildMaterial("G4_A-150_TISSUE");
0105   G4ThreeVector pos1 = G4ThreeVector(0, 2 * cm, -7 * cm);
0106
0107   // Conical section shape
0108   G4double shape1_rmina = 0. * cm, shape1_rmaxa = 2. * cm;
0109   G4double shape1_rminb = 0. * cm, shape1_rmaxb = 4. * cm;
0110   G4double shape1_hz = 3. * cm;
0111   G4double shape1_phimin = 0. * deg, shape1_phimax = 360. * deg;
0112   auto solidShape1 = new G4Cons("Shape1", shape1_rmina, shape1_rmaxa, shape1_rminb, shape1_rmaxb,
0113                                 shape1_hz, shape1_phimin, shape1_phimax);
0114
0115   auto logicShape1 = new G4LogicalVolume(solidShape1,  // its solid
0116                                          shape1_mat,  // its material
0117                                          "Shape1");  // its name
0118
0119   new G4PVPlacement(nullptr,  // no rotation
0120                     pos1,  // at position
0121                     logicShape1,  // its logical volume
0122                     "Shape1",  // its name
0123                     logicEnv,  // its mother  volume
0124                     false,  // no boolean operation
0125                     0,  // copy number
0126                     checkOverlaps);  // overlaps checking
0127
0128   //
0129   // Shape 2
0130   //
0131   G4Material* shape2_mat = nist->FindOrBuildMaterial("G4_BONE_COMPACT_ICRU");
0132   G4ThreeVector pos2 = G4ThreeVector(0, -1 * cm, 7 * cm);
0133
0134   // Trapezoid shape
0135   G4double shape2_dxa = 12 * cm, shape2_dxb = 12 * cm;
0136   G4double shape2_dya = 10 * cm, shape2_dyb = 16 * cm;
0137   G4double shape2_dz = 6 * cm;
0138   auto solidShape2 =
0139     new G4Trd("Shape2",  // its name
0140               0.5 * shape2_dxa, 0.5 * shape2_dxb, 0.5 * shape2_dya, 0.5 * shape2_dyb,
0141               0.5 * shape2_dz);  // its size
0142
0143   auto logicShape2 = new G4LogicalVolume(solidShape2,  // its solid
0144                                          shape2_mat,  // its material
0145                                          "Shape2");  // its name
0146
0147   new G4PVPlacement(nullptr,  // no rotation
0148                     pos2,  // at position
0149                     logicShape2,  // its logical volume
0150                     "Shape2",  // its name
0151                     logicEnv,  // its mother  volume
0152                     false,  // no boolean operation
0153                     0,  // copy number
0154                     checkOverlaps);  // overlaps checking
0155
0156   // Set Shape2 as scoring volume
0157   //
0158   fScoringVolume = logicShape2;
0159
0160   //
0161   // always return the physical World
0162   //
0163   return physWorld;
0164 }
0165
0166 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0167
0168 }  // namespace B1