exgps/src/GeometryConstruction.cc

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0026 //
0027 /// \file eventgenerator/exgps/src/GeometryConstruction.cc
0028 /// \brief Implementation of the GeometryConstruction class
0029 //
0030 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0031 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0032
0033 #include "GeometryConstruction.hh"
0034
0035 #include "G4Box.hh"
0036 #include "G4Colour.hh"
0037 #include "G4Element.hh"
0038 #include "G4LogicalVolume.hh"
0039 #include "G4Material.hh"
0040 #include "G4PVPlacement.hh"
0041 #include "G4PhysicalConstants.hh"
0042 #include "G4Sphere.hh"
0043 #include "G4SystemOfUnits.hh"
0044 #include "G4ThreeVector.hh"
0045 #include "G4VisAttributes.hh"
0046
0047 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
0048
0049 GeometryConstruction::GeometryConstruction()
0050   : G4VUserDetectorConstruction(), fUniverse_phys(0), fAl_phys(0), fSphere_phys(0)
0051 {
0052   ;
0053 }
0054
0055 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
0056
0057 GeometryConstruction::~GeometryConstruction()
0058 {
0059   ;
0060 }
0061
0062 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
0063
0064 G4VPhysicalVolume* GeometryConstruction::Construct()
0065 {
0066   //
0067   //
0068   // Define materials.
0069   //
0070   G4double a, z, density, pressure, temperature;
0071   G4String name, symbol;
0072
0073   density = universe_mean_density;  // from PhysicalConstants.h
0074   pressure = 3.e-18 * pascal;
0075   temperature = 2.73 * kelvin;
0076   G4Material* Vacuum =
0077     new G4Material("Vacuum", 1., 1.01 * g / mole, density, kStateGas, temperature, pressure);
0078   a = 26.98154 * g / mole;
0079   density = 2.70 * g / cm3;
0080   G4Material* Aluminium = new G4Material(name = "aluminium", z = 13., a, density);
0081
0082   a = 28.0855 * g / mole;
0083   G4Element* elSi = new G4Element(name = "silicon", symbol = "Si", z = 14., a);
0084
0085   a = 16.00 * g / mole;
0086   G4Element* elO = new G4Element(name = "Oxygen", symbol = "O", z = 8., a);
0087
0088   density = 2.65 * g / cm3;
0089   G4Material* SiliconDioxide = new G4Material(name = "silicon oxide", density, 2);
0090   SiliconDioxide->AddElement(elSi, 1);
0091   SiliconDioxide->AddElement(elO, 2);
0092   //
0093   // Define size of world and volumes in it.
0094   //
0095   G4double world_r = 18 * cm;
0096
0097   G4double box_x = 10 * cm;
0098   G4double box_y = 10 * cm;
0099   G4double box_z = 10 * cm;
0100
0101   G4double sphere_r = 5 * cm;
0102
0103   // Define bodies, logical volumes and physical volumes.
0104   // First define the experimental hall.
0105   //
0106   G4Sphere* universe_s = new G4Sphere("universe_s", 0, world_r, 0, twopi, 0, pi);
0107   G4LogicalVolume* universe_log = new G4LogicalVolume(universe_s, Vacuum, "universe_L", 0, 0, 0);
0108   //
0109   fUniverse_phys = new G4PVPlacement(0, G4ThreeVector(), "universe_P", universe_log, 0, false, 0);
0110
0111   // define an aluminium box
0112   //
0113   G4Box* Al_box = new G4Box("Al_b", box_x, box_y, box_z);
0114   G4LogicalVolume* Al_log = new G4LogicalVolume(Al_box, Aluminium, "Box_log", 0, 0, 0);
0115   //
0116   fAl_phys =
0117     new G4PVPlacement(0, G4ThreeVector(0., 0., 0.), "Box_phys", Al_log, fUniverse_phys, false, 0);
0118
0119   // Define an inner sphere.
0120   //
0121   G4Sphere* aSphere_sph = new G4Sphere("aSphere", 0, sphere_r, 0, twopi, 0, pi);
0122   G4LogicalVolume* aSphere_log =
0123     new G4LogicalVolume(aSphere_sph, SiliconDioxide, "Sphere_log", 0, 0, 0);
0124   //
0125   fSphere_phys =
0126     new G4PVPlacement(0, G4ThreeVector(0., 0., 0.), "Sphere_phys", aSphere_log, fAl_phys, false, 0);
0127
0128   //--------- Visualization attributes -------------------------------
0129   universe_log->SetVisAttributes(G4VisAttributes::GetInvisible());
0130   G4VisAttributes* aVisAtt = new G4VisAttributes(G4Colour(0, 1.0, 1.0));
0131   Al_log->SetVisAttributes(aVisAtt);
0132   G4VisAttributes* bVisAtt = new G4VisAttributes(G4Colour(1.0, 2.0, .0));
0133   aSphere_log->SetVisAttributes(bVisAtt);
0134
0135   return fUniverse_phys;
0136 }
0137
0138 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....