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25 //
26 //
27 /// \file eventgenerator/exgps/src/GeometryConstruction.cc
28 /// \brief Implementation of the GeometryConstruction class
29 //
30 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
31 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
32
33 #include "GeometryConstruction.hh"
34
35 #include "G4Box.hh"
36 #include "G4Colour.hh"
37 #include "G4Element.hh"
38 #include "G4LogicalVolume.hh"
39 #include "G4Material.hh"
40 #include "G4PVPlacement.hh"
41 #include "G4PhysicalConstants.hh"
42 #include "G4Sphere.hh"
43 #include "G4SystemOfUnits.hh"
44 #include "G4ThreeVector.hh"
45 #include "G4VisAttributes.hh"
46
47 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
48
49 GeometryConstruction::GeometryConstruction()
50 : G4VUserDetectorConstruction(), fUniverse_phys(0), fAl_phys(0), fSphere_phys(0)
51 {
52 ;
53 }
54
55 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
56
57 GeometryConstruction::~GeometryConstruction()
58 {
59 ;
60 }
61
62 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
63
64 G4VPhysicalVolume* GeometryConstruction::Construct()
65 {
66 //
67 //
68 // Define materials.
69 //
70 G4double a, z, density, pressure, temperature;
71 G4String name, symbol;
72
73 density = universe_mean_density; // from PhysicalConstants.h
74 pressure = 3.e-18 * pascal;
75 temperature = 2.73 * kelvin;
76 G4Material* Vacuum =
77 new G4Material("Vacuum", 1., 1.01 * g / mole, density, kStateGas, temperature, pressure);
78 a = 26.98154 * g / mole;
79 density = 2.70 * g / cm3;
80 G4Material* Aluminium = new G4Material(name = "aluminium", z = 13., a, density);
81
82 a = 28.0855 * g / mole;
83 G4Element* elSi = new G4Element(name = "silicon", symbol = "Si", z = 14., a);
84
85 a = 16.00 * g / mole;
86 G4Element* elO = new G4Element(name = "Oxygen", symbol = "O", z = 8., a);
87
88 density = 2.65 * g / cm3;
89 G4Material* SiliconDioxide = new G4Material(name = "silicon oxide", density, 2);
90 SiliconDioxide->AddElement(elSi, 1);
91 SiliconDioxide->AddElement(elO, 2);
92 //
93 // Define size of world and volumes in it.
94 //
95 G4double world_r = 18 * cm;
96
97 G4double box_x = 10 * cm;
98 G4double box_y = 10 * cm;
99 G4double box_z = 10 * cm;
100
101 G4double sphere_r = 5 * cm;
102
103 // Define bodies, logical volumes and physical volumes.
104 // First define the experimental hall.
105 //
106 G4Sphere* universe_s = new G4Sphere("universe_s", 0, world_r, 0, twopi, 0, pi);
107 G4LogicalVolume* universe_log = new G4LogicalVolume(universe_s, Vacuum, "universe_L", 0, 0, 0);
108 //
109 fUniverse_phys = new G4PVPlacement(0, G4ThreeVector(), "universe_P", universe_log, 0, false, 0);
110
111 // define an aluminium box
112 //
113 G4Box* Al_box = new G4Box("Al_b", box_x, box_y, box_z);
114 G4LogicalVolume* Al_log = new G4LogicalVolume(Al_box, Aluminium, "Box_log", 0, 0, 0);
115 //
116 fAl_phys =
117 new G4PVPlacement(0, G4ThreeVector(0., 0., 0.), "Box_phys", Al_log, fUniverse_phys, false, 0);
118
119 // Define an inner sphere.
120 //
121 G4Sphere* aSphere_sph = new G4Sphere("aSphere", 0, sphere_r, 0, twopi, 0, pi);
122 G4LogicalVolume* aSphere_log =
123 new G4LogicalVolume(aSphere_sph, SiliconDioxide, "Sphere_log", 0, 0, 0);
124 //
125 fSphere_phys =
126 new G4PVPlacement(0, G4ThreeVector(0., 0., 0.), "Sphere_phys", aSphere_log, fAl_phys, false, 0);
127
128 //--------- Visualization attributes -------------------------------
129 universe_log->SetVisAttributes(G4VisAttributes::GetInvisible());
130 G4VisAttributes* aVisAtt = new G4VisAttributes(G4Colour(0, 1.0, 1.0));
131 Al_log->SetVisAttributes(aVisAtt);
132 G4VisAttributes* bVisAtt = new G4VisAttributes(G4Colour(1.0, 2.0, .0));
133 aSphere_log->SetVisAttributes(bVisAtt);
134
135 return fUniverse_phys;
136 }
137
138 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
139