standalone/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 "G4Orb.hh"
0036 #include "G4PVPlacement.hh"
0037 #include "G4RunManager.hh"
0038 #include "G4Sphere.hh"
0039 #include "G4SystemOfUnits.hh"
0040 #include "G4Trd.hh"
0041
0042 namespace B1
0043 {
0044
0045 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0046
0047 G4VPhysicalVolume* DetectorConstruction::Construct()
0048 {
0049   // Get nist material manager
0050   G4NistManager* nist = G4NistManager::Instance();
0051
0052   // Envelope parameters
0053   //
0054   G4double env_sizeXY = 20 * cm, env_sizeZ = 30 * cm;
0055   G4Material* env_mat = nist->FindOrBuildMaterial("G4_WATER");
0056
0057   // Option to switch on/off checking of volumes overlaps
0058   //
0059   G4bool checkOverlaps = true;
0060
0061   //
0062   // World
0063   //
0064   G4double world_sizeXY = 1.2 * env_sizeXY;
0065   G4double world_sizeZ = 1.2 * env_sizeZ;
0066   G4Material* world_mat = nist->FindOrBuildMaterial("G4_AIR");
0067
0068   auto solidWorld =
0069     new G4Box("World",  // its name
0070               0.5 * world_sizeXY, 0.5 * world_sizeXY, 0.5 * world_sizeZ);  // its size
0071
0072   auto logicWorld = new G4LogicalVolume(solidWorld,  // its solid
0073                                         world_mat,  // its material
0074                                         "World");  // its name
0075
0076   auto physWorld = new G4PVPlacement(nullptr,  // no rotation
0077                                      G4ThreeVector(),  // at (0,0,0)
0078                                      logicWorld,  // its logical volume
0079                                      "World",  // its name
0080                                      nullptr,  // its mother  volume
0081                                      false,  // no boolean operation
0082                                      0,  // copy number
0083                                      checkOverlaps);  // overlaps checking
0084
0085   //
0086   // Envelope
0087   //
0088   auto solidEnv = new G4Box("Envelope",  // its name
0089                             0.5 * env_sizeXY, 0.5 * env_sizeXY, 0.5 * env_sizeZ);  // its size
0090
0091   auto logicEnv = new G4LogicalVolume(solidEnv,  // its solid
0092                                       env_mat,  // its material
0093                                       "Envelope");  // its name
0094
0095   new G4PVPlacement(nullptr,  // no rotation
0096                     G4ThreeVector(),  // at (0,0,0)
0097                     logicEnv,  // its logical volume
0098                     "Envelope",  // its name
0099                     logicWorld,  // its mother  volume
0100                     false,  // no boolean operation
0101                     0,  // copy number
0102                     checkOverlaps);  // overlaps checking
0103
0104   //
0105   // Shape 1
0106   //
0107   G4Material* shape1_mat = nist->FindOrBuildMaterial("G4_A-150_TISSUE");
0108   G4ThreeVector pos1 = G4ThreeVector(0, 2 * cm, -7 * cm);
0109
0110   // Conical section shape
0111   G4double shape1_rmina = 0. * cm, shape1_rmaxa = 2. * cm;
0112   G4double shape1_rminb = 0. * cm, shape1_rmaxb = 4. * cm;
0113   G4double shape1_hz = 3. * cm;
0114   G4double shape1_phimin = 0. * deg, shape1_phimax = 360. * deg;
0115   auto solidShape1 = new G4Cons("Shape1", shape1_rmina, shape1_rmaxa, shape1_rminb, shape1_rmaxb,
0116                                 shape1_hz, shape1_phimin, shape1_phimax);
0117
0118   auto logicShape1 = new G4LogicalVolume(solidShape1,  // its solid
0119                                          shape1_mat,  // its material
0120                                          "Shape1");  // its name
0121
0122   new G4PVPlacement(nullptr,  // no rotation
0123                     pos1,  // at position
0124                     logicShape1,  // its logical volume
0125                     "Shape1",  // its name
0126                     logicEnv,  // its mother  volume
0127                     false,  // no boolean operation
0128                     0,  // copy number
0129                     checkOverlaps);  // overlaps checking
0130
0131   //
0132   // Shape 2
0133   //
0134   G4Material* shape2_mat = nist->FindOrBuildMaterial("G4_BONE_COMPACT_ICRU");
0135   G4ThreeVector pos2 = G4ThreeVector(0, -1 * cm, 7 * cm);
0136
0137   // Trapezoid shape
0138   G4double shape2_dxa = 12 * cm, shape2_dxb = 12 * cm;
0139   G4double shape2_dya = 10 * cm, shape2_dyb = 16 * cm;
0140   G4double shape2_dz = 6 * cm;
0141   auto solidShape2 =
0142     new G4Trd("Shape2",  // its name
0143               0.5 * shape2_dxa, 0.5 * shape2_dxb, 0.5 * shape2_dya, 0.5 * shape2_dyb,
0144               0.5 * shape2_dz);  // its size
0145
0146   auto logicShape2 = new G4LogicalVolume(solidShape2,  // its solid
0147                                          shape2_mat,  // its material
0148                                          "Shape2");  // its name
0149
0150   new G4PVPlacement(nullptr,  // no rotation
0151                     pos2,  // at position
0152                     logicShape2,  // its logical volume
0153                     "Shape2",  // its name
0154                     logicEnv,  // its mother  volume
0155                     false,  // no boolean operation
0156                     0,  // copy number
0157                     checkOverlaps);  // overlaps checking
0158
0159   // Set Shape2 as scoring volume
0160   //
0161   fScoringVolume = logicShape2;
0162
0163   //
0164   // always return the physical World
0165   //
0166   return physWorld;
0167 }
0168
0169 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0170
0171 }  // namespace B1