NeutronSource/src/DetectorConstruction.cc

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0025 //
0026 /// \file DetectorConstruction.cc
0027 /// \brief Implementation of the DetectorConstruction class
0028 //
0029 //
0030 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0031 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0032
0033 #include "DetectorConstruction.hh"
0034
0035 #include "DetectorMessenger.hh"
0036
0037 #include "G4Box.hh"
0038 #include "G4GeometryManager.hh"
0039 #include "G4LogicalVolume.hh"
0040 #include "G4LogicalVolumeStore.hh"
0041 #include "G4Material.hh"
0042 #include "G4NistManager.hh"
0043 #include "G4PVPlacement.hh"
0044 #include "G4PhysicalConstants.hh"
0045 #include "G4PhysicalVolumeStore.hh"
0046 #include "G4RunManager.hh"
0047 #include "G4SolidStore.hh"
0048 #include "G4SystemOfUnits.hh"
0049 #include "G4Tubs.hh"
0050 #include "G4UnitsTable.hh"
0051
0052 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0053
0054 DetectorConstruction::DetectorConstruction()
0055 {
0056   fAbsorRadius = 15 * mm;
0057   fAbsorLength = 60 * mm;
0058   fContainThickness = 2.4 * mm;
0059   DefineMaterials();
0060   SetAbsorMaterial("BeO");
0061   SetContainMaterial("Stainless-Steel");
0062   fDetectorMessenger = new DetectorMessenger(this);
0063 }
0064
0065 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0066
0067 DetectorConstruction::~DetectorConstruction()
0068 {
0069   delete fDetectorMessenger;
0070 }
0071
0072 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0073
0074 G4VPhysicalVolume* DetectorConstruction::Construct()
0075 {
0076   return ConstructVolumes();
0077 }
0078
0079 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0080
0081 void DetectorConstruction::DefineMaterials()
0082 {
0083   G4int ncomponents, natoms;
0084
0085   G4Element* Be = new G4Element("Beryllium", "Be", 4., 9.01 * g / mole);
0086   G4Element* N = new G4Element("Nitrogen", "N", 7., 14.01 * g / mole);
0087   G4Element* O = new G4Element("Oxygen", "O", 8., 16.00 * g / mole);
0088   G4Element* Cr = new G4Element("Chromium", "Cr", 24., 51.99 * g / mole);
0089   G4Element* Fe = new G4Element("Iron", "Fe", 26., 55.84 * g / mole);
0090   G4Element* Ni = new G4Element("Nickel", "Ni", 28., 58.69 * g / mole);
0091
0092   G4Material* BeO = new G4Material("BeO", 3.05 * g / cm3, ncomponents = 2);
0093   BeO->AddElement(Be, natoms = 1);
0094   BeO->AddElement(O, natoms = 1);
0095
0096   G4Material* inox = new G4Material("Stainless-Steel", 8 * g / cm3, ncomponents = 3);
0097   inox->AddElement(Fe, 74 * perCent);
0098   inox->AddElement(Cr, 18 * perCent);
0099   inox->AddElement(Ni, 8 * perCent);
0100
0101   G4Material* Air = new G4Material("Air", 1.290 * mg / cm3, ncomponents = 2);
0102   Air->AddElement(N, 70. * perCent);
0103   Air->AddElement(O, 30. * perCent);
0104
0105   fWorldMaterial = Air;
0106
0107   /// G4cout << *(G4Material::GetMaterialTable()) << G4endl;
0108 }
0109
0110 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0111
0112 G4Material* DetectorConstruction::MaterialWithSingleIsotope(G4String name, G4String symbol,
0113                                                             G4double density, G4int Z, G4int A)
0114 {
0115   // define a material from an isotope
0116   //
0117   G4int ncomponents;
0118   G4double abundance, massfraction;
0119
0120   G4Isotope* isotope = new G4Isotope(symbol, Z, A);
0121
0122   G4Element* element = new G4Element(name, symbol, ncomponents = 1);
0123   element->AddIsotope(isotope, abundance = 100. * perCent);
0124
0125   G4Material* material = new G4Material(name, density, ncomponents = 1);
0126   material->AddElement(element, massfraction = 100. * perCent);
0127
0128   return material;
0129 }
0130
0131 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0132
0133 G4VPhysicalVolume* DetectorConstruction::ConstructVolumes()
0134 {
0135   // Cleanup old geometry
0136   G4GeometryManager::GetInstance()->OpenGeometry();
0137   G4PhysicalVolumeStore::GetInstance()->Clean();
0138   G4LogicalVolumeStore::GetInstance()->Clean();
0139   G4SolidStore::GetInstance()->Clean();
0140
0141   // compute dimensions
0142   G4double ContainRadius = fAbsorRadius + fContainThickness;
0143   G4double ContainLength = fAbsorLength + 2 * fContainThickness;
0144
0145   G4double WorldSizeXY = 2.4 * ContainRadius;
0146   G4double WorldSizeZ = 1.2 * ContainLength;
0147
0148   // World
0149   //
0150   G4Box* sWorld = new G4Box("World",  // name
0151                             0.5 * WorldSizeXY, 0.5 * WorldSizeXY, 0.5 * WorldSizeZ);  // dimensions
0152
0153   G4LogicalVolume* lWorld = new G4LogicalVolume(sWorld,  // shape
0154                                                 fWorldMaterial,  // material
0155                                                 "World");  // name
0156
0157   fPWorld = new G4PVPlacement(0,  // no rotation
0158                               G4ThreeVector(),  // at (0,0,0)
0159                               lWorld,  // logical volume
0160                               "World",  // name
0161                               0,  // mother volume
0162                               false,  // no boolean operation
0163                               0);  // copy number
0164
0165   // Container
0166   //
0167   G4Tubs* sContain = new G4Tubs("Container",  // name
0168                                 0., ContainRadius, 0.5 * ContainLength, 0., twopi);  // dimensions
0169
0170   fLContain = new G4LogicalVolume(sContain,  // shape
0171                                   fContainMaterial,  // material
0172                                   fContainMaterial->GetName());  // name
0173
0174   new G4PVPlacement(0,  // no rotation
0175                     G4ThreeVector(),  // at (0,0,0)
0176                     fLContain,  // logical volume
0177                     fContainMaterial->GetName(),  // name
0178                     lWorld,  // mother  volume
0179                     false,  // no boolean operation
0180                     0);  // copy number
0181
0182   // Absorber
0183   //
0184   G4Tubs* sAbsor = new G4Tubs("Absorber",  // name
0185                               0., fAbsorRadius, 0.5 * fAbsorLength, 0., twopi);  // dimensions
0186
0187   fLAbsor = new G4LogicalVolume(sAbsor,  // shape
0188                                 fAbsorMaterial,  // material
0189                                 fAbsorMaterial->GetName());  // name
0190
0191   new G4PVPlacement(0,  // no rotation
0192                     G4ThreeVector(),  // at (0,0,0)
0193                     fLAbsor,  // logical volume
0194                     fAbsorMaterial->GetName(),  // name
0195                     fLContain,  // mother  volume
0196                     false,  // no boolean operation
0197                     0);  // copy number
0198
0199   PrintParameters();
0200
0201   // always return the root volume
0202   //
0203   return fPWorld;
0204 }
0205
0206 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0207
0208 void DetectorConstruction::PrintParameters()
0209 {
0210   G4cout << "\n The Absorber  is a cylinder of " << fAbsorMaterial->GetName()
0211          << "  radius = " << G4BestUnit(fAbsorRadius, "Length")
0212          << "  length = " << G4BestUnit(fAbsorLength, "Length") << G4endl;
0213   G4cout << " The Container is a cylinder of " << fContainMaterial->GetName()
0214          << "  thickness = " << G4BestUnit(fContainThickness, "Length") << G4endl;
0215
0216   G4cout << "\n" << fAbsorMaterial << G4endl;
0217   G4cout << "\n" << fContainMaterial << G4endl;
0218 }
0219
0220 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0221
0222 void DetectorConstruction::SetAbsorMaterial(G4String materialChoice)
0223 {
0224   // search the material by its name
0225   G4Material* pttoMaterial = G4NistManager::Instance()->FindOrBuildMaterial(materialChoice);
0226
0227   if (pttoMaterial) {
0228     fAbsorMaterial = pttoMaterial;
0229     if (fLAbsor) {
0230       fLAbsor->SetMaterial(fAbsorMaterial);
0231     }
0232     G4RunManager::GetRunManager()->PhysicsHasBeenModified();
0233   }
0234   else {
0235     G4cout << "\n--> warning from DetectorConstruction::SetAbsorMaterial : " << materialChoice
0236            << " not found" << G4endl;
0237   }
0238 }
0239
0240 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0241
0242 void DetectorConstruction::SetContainMaterial(G4String materialChoice)
0243 {
0244   // search the material by its name
0245   G4Material* pttoMaterial = G4NistManager::Instance()->FindOrBuildMaterial(materialChoice);
0246
0247   if (pttoMaterial) {
0248     fContainMaterial = pttoMaterial;
0249     if (fLContain) {
0250       fLContain->SetMaterial(fContainMaterial);
0251     }
0252     G4RunManager::GetRunManager()->PhysicsHasBeenModified();
0253   }
0254   else {
0255     G4cout << "\n--> warning from DetectorConstruction::SetContainMaterial : " << materialChoice
0256            << " not found" << G4endl;
0257   }
0258 }
0259
0260 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0261
0262 void DetectorConstruction::SetAbsorRadius(G4double value)
0263 {
0264   fAbsorRadius = value;
0265   G4RunManager::GetRunManager()->ReinitializeGeometry();
0266 }
0267
0268 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0269
0270 void DetectorConstruction::SetAbsorLength(G4double value)
0271 {
0272   fAbsorLength = value;
0273   G4RunManager::GetRunManager()->ReinitializeGeometry();
0274 }
0275
0276 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0277
0278 void DetectorConstruction::SetContainThickness(G4double value)
0279 {
0280   fContainThickness = value;
0281   G4RunManager::GetRunManager()->ReinitializeGeometry();
0282 }
0283
0284 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......