Hadr07/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 "G4AutoDelete.hh"
0038 #include "G4Box.hh"
0039 #include "G4GeometryManager.hh"
0040 #include "G4GlobalMagFieldMessenger.hh"
0041 #include "G4LogicalVolume.hh"
0042 #include "G4LogicalVolumeStore.hh"
0043 #include "G4Material.hh"
0044 #include "G4NistManager.hh"
0045 #include "G4PVPlacement.hh"
0046 #include "G4PVReplica.hh"
0047 #include "G4PhysicalConstants.hh"
0048 #include "G4PhysicalVolumeStore.hh"
0049 #include "G4RunManager.hh"
0050 #include "G4SolidStore.hh"
0051 #include "G4SystemOfUnits.hh"
0052 #include "G4UImanager.hh"
0053 #include "G4UniformMagField.hh"
0054 #include "G4UnitsTable.hh"
0055
0056 #include <iomanip>
0057
0058 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0059
0060 DetectorConstruction::DetectorConstruction()
0061 {
0062   // default parameter values of the absorbers
0063   fNbOfAbsor = 1;
0064   fAbsorThickness[0] = 0 * mm;  // dummy, for initialization
0065   fAbsorThickness[1] = 1 * mm;
0066   fAbsorSizeYZ = 1 * mm;
0067
0068   ComputeParameters();
0069
0070   // materials
0071   DefineMaterials();
0072   SetAbsorMaterial(1, "G4_Si");
0073
0074   // create commands for interactive definition of the calorimeter
0075   fDetectorMessenger = new DetectorMessenger(this);
0076 }
0077
0078 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0079
0080 DetectorConstruction::~DetectorConstruction()
0081 {
0082   delete fDetectorMessenger;
0083 }
0084
0085 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0086
0087 G4VPhysicalVolume* DetectorConstruction::Construct()
0088 {
0089   return ConstructVolumes();
0090 }
0091
0092 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0093
0094 void DetectorConstruction::DefineMaterials()
0095 {
0096   G4NistManager* man = G4NistManager::Instance();
0097
0098   man->FindOrBuildMaterial("G4_AIR");
0099
0100   G4Element* H = man->FindOrBuildElement("H");
0101   G4Element* O = man->FindOrBuildElement("O");
0102
0103   G4Material* H2O = new G4Material("Water", 1.000 * g / cm3, 2);
0104   H2O->AddElement(H, 2);
0105   H2O->AddElement(O, 1);
0106   H2O->GetIonisation()->SetMeanExcitationEnergy(78.0 * eV);
0107
0108   G4Element* Hf = man->FindOrBuildElement("Hf");
0109
0110   G4Material* HfO2 = new G4Material("HfO2", 9.68 * g / cm3, 2);
0111   HfO2->AddElement(Hf, 1);
0112   HfO2->AddElement(O, 2);
0113
0114   // example of vacuum
0115   G4double density = universe_mean_density;  // from PhysicalConstants.h
0116   G4double pressure = 3.e-18 * pascal;
0117   G4double temperature = 2.73 * kelvin;
0118   G4Material* Galactic =
0119     new G4Material("Galactic", 1., 1.008 * g / mole, density, kStateGas, temperature, pressure);
0120
0121   fDefaultMaterial = Galactic;
0122
0123   //  G4cout << *(G4Material::GetMaterialTable()) << G4endl;
0124 }
0125
0126 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0127
0128 G4Material* DetectorConstruction::MaterialWithSingleIsotope(G4String name, G4String symbol,
0129                                                             G4double density, G4int Z, G4int A)
0130 {
0131   // define a material from an isotope
0132   //
0133   G4int ncomponents;
0134   G4double abundance, massfraction;
0135
0136   G4Isotope* isotope = new G4Isotope(symbol, Z, A);
0137
0138   G4Element* element = new G4Element(name, symbol, ncomponents = 1);
0139   element->AddIsotope(isotope, abundance = 100. * perCent);
0140
0141   G4Material* material = new G4Material(name, density, ncomponents = 1);
0142   material->AddElement(element, massfraction = 100. * perCent);
0143
0144   return material;
0145 }
0146
0147 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0148
0149 void DetectorConstruction::ComputeParameters()
0150 {
0151   // Compute total thickness of absorbers
0152   fAbsorSizeX = 0.;
0153   for (G4int iAbs = 1; iAbs <= fNbOfAbsor; iAbs++) {
0154     fAbsorSizeX += fAbsorThickness[iAbs];
0155   }
0156   fWorldSizeX = 1.2 * fAbsorSizeX;
0157   fWorldSizeYZ = 1.2 * fAbsorSizeYZ;
0158 }
0159
0160 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0161
0162 G4VPhysicalVolume* DetectorConstruction::ConstructVolumes()
0163 {
0164   // complete the Calor parameters definition
0165   ComputeParameters();
0166
0167   // Cleanup old geometry
0168   G4GeometryManager::GetInstance()->OpenGeometry();
0169   G4PhysicalVolumeStore::GetInstance()->Clean();
0170   G4LogicalVolumeStore::GetInstance()->Clean();
0171   G4SolidStore::GetInstance()->Clean();
0172
0173   //
0174   // World
0175   //
0176   G4Box* solidWorld = new G4Box("World",  // name
0177                                 fWorldSizeX / 2, fWorldSizeYZ / 2, fWorldSizeYZ / 2);  // size
0178
0179   G4LogicalVolume* logicWorld = new G4LogicalVolume(solidWorld,  // solid
0180                                                     fDefaultMaterial,  // material
0181                                                     "World");  // name
0182
0183   fPhysiWorld = new G4PVPlacement(0,  // no rotation
0184                                   G4ThreeVector(),  // at (0,0,0)
0185                                   logicWorld,  // logical volume
0186                                   "World",  // name
0187                                   0,  // mother volume
0188                                   false,  // no boolean operation
0189                                   0);  // copy number
0190
0191   //
0192   // Absorbers
0193   //
0194   fXfront[0] = -0.5 * fAbsorSizeX;
0195   //
0196   for (G4int k = 1; k <= fNbOfAbsor; k++) {
0197     G4Material* material = fAbsorMaterial[k];
0198     G4String matname = material->GetName();
0199
0200     G4Box* solidAbsor =
0201       new G4Box(matname, fAbsorThickness[k] / 2, fAbsorSizeYZ / 2, fAbsorSizeYZ / 2);
0202
0203     G4LogicalVolume* logicAbsor = new G4LogicalVolume(solidAbsor,  // solid
0204                                                       material,  // material
0205                                                       matname);  // name
0206
0207     fXfront[k] = fXfront[k - 1] + fAbsorThickness[k - 1];
0208     G4double xcenter = fXfront[k] + 0.5 * fAbsorThickness[k];
0209     G4ThreeVector position = G4ThreeVector(xcenter, 0., 0.);
0210
0211     new G4PVPlacement(0,  // no rotation
0212                       position,  // position
0213                       logicAbsor,  // logical volume
0214                       matname,  // name
0215                       logicWorld,  // mother
0216                       false,  // no boulean operat
0217                       k);  // copy number
0218   }
0219
0220   PrintParameters();
0221
0222   // always return the physical World
0223   //
0224   return fPhysiWorld;
0225 }
0226
0227 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0228
0229 void DetectorConstruction::PrintParameters()
0230 {
0231   G4cout << "\n-------------------------------------------------------------"
0232          << "\n ---> The Absorber is " << fNbOfAbsor << " layers of:";
0233   for (G4int i = 1; i <= fNbOfAbsor; i++) {
0234     G4cout << "\n \t" << std::setw(12) << fAbsorMaterial[i]->GetName() << ": " << std::setw(6)
0235            << G4BestUnit(fAbsorThickness[i], "Length");
0236   }
0237   G4cout << "\n-------------------------------------------------------------\n" << G4endl;
0238 }
0239
0240 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0241
0242 void DetectorConstruction::SetNbOfAbsor(G4int ival)
0243 {
0244   // set the number of Absorbers
0245   //
0246   if (ival < 1 || ival > (kMaxAbsor - 1)) {
0247     G4cout << "\n ---> warning from SetfNbOfAbsor: " << ival << " must be at least 1 and and most "
0248            << kMaxAbsor - 1 << ". Command refused" << G4endl;
0249     return;
0250   }
0251   fNbOfAbsor = ival;
0252   G4RunManager::GetRunManager()->ReinitializeGeometry();
0253 }
0254
0255 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0256
0257 void DetectorConstruction::SetAbsorMaterial(G4int iabs, const G4String& material)
0258 {
0259   // search the material by its name
0260   //
0261   if (iabs > fNbOfAbsor || iabs <= 0) {
0262     G4cout << "\n --->warning from SetfAbsorMaterial: absor number " << iabs
0263            << " out of range. Command refused" << G4endl;
0264     return;
0265   }
0266
0267   G4Material* pttoMaterial = G4NistManager::Instance()->FindOrBuildMaterial(material);
0268   if (pttoMaterial) {
0269     fAbsorMaterial[iabs] = pttoMaterial;
0270     G4RunManager::GetRunManager()->PhysicsHasBeenModified();
0271   }
0272 }
0273
0274 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0275
0276 void DetectorConstruction::SetAbsorThickness(G4int iabs, G4double val)
0277 {
0278   // change Absorber thickness
0279   //
0280   if (iabs > fNbOfAbsor || iabs <= 0) {
0281     G4cout << "\n --->warning from SetfAbsorThickness: absor number " << iabs
0282            << " out of range. Command refused" << G4endl;
0283     return;
0284   }
0285   if (val <= DBL_MIN) {
0286     G4cout << "\n --->warning from SetfAbsorThickness: thickness " << val
0287            << " out of range. Command refused" << G4endl;
0288     return;
0289   }
0290   fAbsorThickness[iabs] = val;
0291   G4RunManager::GetRunManager()->ReinitializeGeometry();
0292 }
0293
0294 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0295
0296 void DetectorConstruction::SetAbsorSizeYZ(G4double val)
0297 {
0298   // change the transverse size
0299   //
0300   if (val <= DBL_MIN) {
0301     G4cout << "\n --->warning from SetfAbsorSizeYZ: thickness " << val
0302            << " out of range. Command refused" << G4endl;
0303     return;
0304   }
0305   fAbsorSizeYZ = val;
0306   G4RunManager::GetRunManager()->ReinitializeGeometry();
0307 }
0308
0309 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0310
0311 void DetectorConstruction::ConstructSDandField()
0312 {
0313   if (fFieldMessenger.Get() == 0) {
0314     // Create global magnetic field messenger.
0315     // Uniform magnetic field is then created automatically if
0316     // the field value is not zero.
0317     G4ThreeVector fieldValue = G4ThreeVector();
0318     G4GlobalMagFieldMessenger* msg = new G4GlobalMagFieldMessenger(fieldValue);
0319     // msg->SetVerboseLevel(1);
0320     G4AutoDelete::Register(msg);
0321     fFieldMessenger.Put(msg);
0322   }
0323 }
0324
0325 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......