standalone/src/DetectorConstruction.cc

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0027 /// \file DetectorConstruction.cc
0028 /// \brief Implementation of the B1::DetectorConstruction class
0029
0030 #include "DetectorConstruction.hh"
0031
0032 #include "G4Box.hh"
0033 #include "G4Cons.hh"
0034 #include "G4LogicalVolume.hh"
0035 #include "G4NistManager.hh"
0036 #include "G4Orb.hh"
0037 #include "G4PVPlacement.hh"
0038 #include "G4RunManager.hh"
0039 #include "G4Sphere.hh"
0040 #include "G4SystemOfUnits.hh"
0041 #include "G4Trd.hh"
0042
0043 namespace B1
0044 {
0045
0046 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0047
0048 G4VPhysicalVolume* DetectorConstruction::Construct()
0049 {
0050   // Get nist material manager
0051   G4NistManager* nist = G4NistManager::Instance();
0052
0053   // Envelope parameters
0054   //
0055   G4double env_sizeXY = 20 * cm, env_sizeZ = 30 * cm;
0056   G4Material* env_mat = nist->FindOrBuildMaterial("G4_WATER");
0057
0058   // Option to switch on/off checking of volumes overlaps
0059   //
0060   G4bool checkOverlaps = true;
0061
0062   //
0063   // World
0064   //
0065   G4double world_sizeXY = 1.2 * env_sizeXY;
0066   G4double world_sizeZ = 1.2 * env_sizeZ;
0067   G4Material* world_mat = nist->FindOrBuildMaterial("G4_AIR");
0068
0069   auto solidWorld =
0070     new G4Box("World",  // its name
0071               0.5 * world_sizeXY, 0.5 * world_sizeXY, 0.5 * world_sizeZ);  // its size
0072
0073   auto logicWorld = new G4LogicalVolume(solidWorld,  // its solid
0074                                         world_mat,  // its material
0075                                         "World");  // its name
0076
0077   auto physWorld = new G4PVPlacement(nullptr,  // no rotation
0078                                      G4ThreeVector(),  // at (0,0,0)
0079                                      logicWorld,  // its logical volume
0080                                      "World",  // its name
0081                                      nullptr,  // its mother  volume
0082                                      false,  // no boolean operation
0083                                      0,  // copy number
0084                                      checkOverlaps);  // overlaps checking
0085
0086   //
0087   // Envelope
0088   //
0089   auto solidEnv = new G4Box("Envelope",  // its name
0090                             0.5 * env_sizeXY, 0.5 * env_sizeXY, 0.5 * env_sizeZ);  // its size
0091
0092   auto logicEnv = new G4LogicalVolume(solidEnv,  // its solid
0093                                       env_mat,  // its material
0094                                       "Envelope");  // its name
0095
0096   new G4PVPlacement(nullptr,  // no rotation
0097                     G4ThreeVector(),  // at (0,0,0)
0098                     logicEnv,  // its logical volume
0099                     "Envelope",  // its name
0100                     logicWorld,  // its mother  volume
0101                     false,  // no boolean operation
0102                     0,  // copy number
0103                     checkOverlaps);  // overlaps checking
0104
0105   //
0106   // Shape 1
0107   //
0108   G4Material* shape1_mat = nist->FindOrBuildMaterial("G4_A-150_TISSUE");
0109   G4ThreeVector pos1 = G4ThreeVector(0, 2 * cm, -7 * cm);
0110
0111   // Conical section shape
0112   G4double shape1_rmina = 0. * cm, shape1_rmaxa = 2. * cm;
0113   G4double shape1_rminb = 0. * cm, shape1_rmaxb = 4. * cm;
0114   G4double shape1_hz = 3. * cm;
0115   G4double shape1_phimin = 0. * deg, shape1_phimax = 360. * deg;
0116   auto solidShape1 = new G4Cons("Shape1", shape1_rmina, shape1_rmaxa, shape1_rminb, shape1_rmaxb,
0117                                 shape1_hz, shape1_phimin, shape1_phimax);
0118
0119   auto logicShape1 = new G4LogicalVolume(solidShape1,  // its solid
0120                                          shape1_mat,  // its material
0121                                          "Shape1");  // its name
0122
0123   new G4PVPlacement(nullptr,  // no rotation
0124                     pos1,  // at position
0125                     logicShape1,  // its logical volume
0126                     "Shape1",  // its name
0127                     logicEnv,  // its mother  volume
0128                     false,  // no boolean operation
0129                     0,  // copy number
0130                     checkOverlaps);  // overlaps checking
0131
0132   //
0133   // Shape 2
0134   //
0135   G4Material* shape2_mat = nist->FindOrBuildMaterial("G4_BONE_COMPACT_ICRU");
0136   G4ThreeVector pos2 = G4ThreeVector(0, -1 * cm, 7 * cm);
0137
0138   // Trapezoid shape
0139   G4double shape2_dxa = 12 * cm, shape2_dxb = 12 * cm;
0140   G4double shape2_dya = 10 * cm, shape2_dyb = 16 * cm;
0141   G4double shape2_dz = 6 * cm;
0142   auto solidShape2 =
0143     new G4Trd("Shape2",  // its name
0144               0.5 * shape2_dxa, 0.5 * shape2_dxb, 0.5 * shape2_dya, 0.5 * shape2_dyb,
0145               0.5 * shape2_dz);  // its size
0146
0147   auto logicShape2 = new G4LogicalVolume(solidShape2,  // its solid
0148                                          shape2_mat,  // its material
0149                                          "Shape2");  // its name
0150
0151   new G4PVPlacement(nullptr,  // no rotation
0152                     pos2,  // at position
0153                     logicShape2,  // its logical volume
0154                     "Shape2",  // its name
0155                     logicEnv,  // its mother  volume
0156                     false,  // no boolean operation
0157                     0,  // copy number
0158                     checkOverlaps);  // overlaps checking
0159
0160   // Set Shape2 as scoring volume
0161   //
0162   fScoringVolume = logicShape2;
0163
0164   //
0165   // always return the physical World
0166   //
0167   return physWorld;
0168 }
0169
0170 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0171
0172 }  // namespace B1