| Geant4 Cross Reference |
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25 //
26 //
27 /// \file DetectorConstruction.cc
28 /// \brief Implementation of the DetectorConstruction class
29
30 #include "DetectorConstruction.hh"
31
32 #include "ScreenSD.hh"
33
34 #include "G4AutoDelete.hh"
35 #include "G4Box.hh"
36 #include "G4Colour.hh"
37 #include "G4GlobalMagFieldMessenger.hh"
38 #include "G4LogicalVolume.hh"
39 #include "G4Material.hh"
40 #include "G4NistManager.hh"
41 #include "G4PVPlacement.hh"
42 #include "G4SDManager.hh"
43 #include "G4SystemOfUnits.hh"
44 #include "G4VisAttributes.hh"
45
46 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
47
48 G4ThreadLocal G4GlobalMagFieldMessenger* DetectorConstruction::fMagFieldMessenger = nullptr;
49
50 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
51
52 G4VPhysicalVolume* DetectorConstruction::Construct()
53 {
54 // Get nist material manager
55 G4NistManager* nistManager = G4NistManager::Instance();
56
57 // Build materials
58 G4Material* air = nistManager->FindOrBuildMaterial("G4_AIR");
59 G4Material* csi = nistManager->FindOrBuildMaterial("G4_CESIUM_IODIDE");
60 // There is no need to test if materials were built/found
61 // as G4NistManager would issue an error otherwise
62 // Try the code with "XYZ".
63
64 // Print all materials
65 G4cout << *(G4Material::GetMaterialTable()) << G4endl;
66
67 // Option to switch on/off checking of volumes overlaps
68 G4bool checkOverlaps = true;
69
70 //
71 // World
72 //
73
74 // The world dimensions
75 G4double worldHxyz = 2. * m;
76
77 // world volume
78 auto worldS = new G4Box("World", worldHxyz, worldHxyz, worldHxyz);
79
80 auto worldLV = new G4LogicalVolume(worldS, air, "World");
81
82 G4VPhysicalVolume* worldPV =
83 new G4PVPlacement(nullptr, G4ThreeVector(), worldLV, "World", nullptr, false, 0, checkOverlaps);
84
85 //
86 // Box
87 //
88
89 // The box dimensions
90 G4double boxHxy = 1. * m;
91 G4double boxHz = 10. * cm;
92
93 // box volume
94 auto boxS = new G4Box("World", boxHxy, boxHxy, boxHz);
95
96 auto boxLV = new G4LogicalVolume(boxS, csi, "Box");
97
98 // The box position
99 G4double posz = 0. * m;
100
101 new G4PVPlacement(nullptr, G4ThreeVector(0, 0, posz), boxLV, "Box", worldLV, false, 0,
102 checkOverlaps);
103
104 //
105 // Scoring screen
106 //
107 // The screen dimensions
108 G4double screenHxy = 1.999 * m;
109 G4double screenHz = 1. * mm;
110
111 // Screen volume
112 auto screenS = new G4Box("World", screenHxy, screenHxy, screenHz);
113
114 auto screenLV = new G4LogicalVolume(screenS, air, "Screen");
115
116 // The screen position
117 posz += boxHz + screenHz;
118
119 new G4PVPlacement(nullptr, G4ThreeVector(0, 0, posz), screenLV, "Screen", worldLV, false, 0,
120 checkOverlaps);
121
122 //
123 // Visualization attributes
124 //
125 worldLV->SetVisAttributes(G4VisAttributes::GetInvisible());
126
127 auto simpleBoxVisAtt = new G4VisAttributes(G4Colour(1.0, 1.0, 1.0));
128 simpleBoxVisAtt->SetVisibility(true);
129 boxLV->SetVisAttributes(simpleBoxVisAtt);
130 screenLV->SetVisAttributes(simpleBoxVisAtt);
131
132 //
133 // Always return the physical World
134 //
135 return worldPV;
136 }
137
138 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
139
140 void DetectorConstruction::ConstructSDandField()
141 {
142 // G4SDManager::GetSDMpointer()->SetVerboseLevel(1);
143
144 //
145 // Sensitive detectors
146 //
147 auto screenSD = new ScreenSD("ScreenSD");
148 G4SDManager::GetSDMpointer()->AddNewDetector(screenSD);
149 SetSensitiveDetector("Screen", screenSD);
150
151 //
152 // Magnetic field
153 //
154 // Create global magnetic field messenger.
155 // Uniform magnetic field is then created automatically if
156 // the field value is not zero.
157 G4ThreeVector fieldValue;
158 fMagFieldMessenger = new G4GlobalMagFieldMessenger(fieldValue);
159 fMagFieldMessenger->SetVerboseLevel(1);
160
161 // Register the field messenger for deleting
162 G4AutoDelete::Register(fMagFieldMessenger);
163 }
164
165 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
166