B1/src/DetectorConstruction.cc

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