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25 //
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 "G4LogicalVolume.hh"
34 #include "G4NistManager.hh"
35 #include "G4PVPlacement.hh"
36 #include "G4RunManager.hh"
37 #include "G4SubtractionSolid.hh"
38 #include "G4SystemOfUnits.hh"
39 #include "G4Tubs.hh"
40
41 #include <cmath>
42
43 namespace VtkVis
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 = 10 * m, env_sizeZ = 10 * m;
56 G4Material* env_mat = nist->FindOrBuildMaterial("G4_Galactic");
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 auto dumpPos = G4ThreeVector(0, 0, 0);
106 auto dumpMat = nist->FindOrBuildMaterial("G4_CONCRETE");
107 auto dumpShape1 = new G4Box("dumpShape1", 1 * m, 1 * m, 0.5 * m);
108
109 auto dumpCutoutPos = G4ThreeVector(0, 0, -5.1 * cm);
110 auto dumpCutoutShape = new G4Tubs("DumpCutoutShape", 0 * cm, 10 * cm, 90 / 2 * cm, 0, 2 * M_PI);
111
112 auto dumpShape2 =
113 new G4SubtractionSolid("dumpShape2", dumpShape1, dumpCutoutShape, 0, dumpCutoutPos);
114
115 auto dumpLogical = new G4LogicalVolume(dumpShape2,
116 dumpMat, // its material
117 "dump");
118 // its name
119 new G4PVPlacement(nullptr, // no rotation
120 dumpPos, // at position
121 dumpLogical, // its logical volume
122 "dump", // its name
123 logicEnv, // its mother volume
124 false, // no boolean operation
125 0, // copy number
126 checkOverlaps); // overlaps checking
127
128 fScoringVolume = dumpLogical;
129
130 //
131 // always return the physical World
132 //
133 return physWorld;
134 }
135
136 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
137
138 } // namespace VtkVis
139