TestEm3/src/DetectorConstruction.cc

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0026 /// \file DetectorConstruction.cc
0027 /// \brief Implementation of the DetectorConstruction class
0028
0029 #include "DetectorConstruction.hh"
0030
0031 #include "DetectorMessenger.hh"
0032
0033 #include "G4Box.hh"
0034 #include "G4GeometryManager.hh"
0035 #include "G4LogicalVolume.hh"
0036 #include "G4LogicalVolumeStore.hh"
0037 #include "G4Material.hh"
0038 #include "G4NistManager.hh"
0039 #include "G4PVPlacement.hh"
0040 #include "G4PVReplica.hh"
0041 #include "G4PhysicalConstants.hh"
0042 #include "G4PhysicalVolumeStore.hh"
0043 #include "G4RunManager.hh"
0044 #include "G4SolidStore.hh"
0045 #include "G4SystemOfUnits.hh"
0046 #include "G4UnitsTable.hh"
0047
0048 #include <iomanip>
0049
0050 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0051
0052 DetectorConstruction::DetectorConstruction()
0053 {
0054   for (G4int i = 0; i < kMaxAbsor; ++i) {
0055     fAbsorMaterial[i] = nullptr;
0056     fAbsorThickness[i] = 0.0;
0057     fSolidAbsor[i] = nullptr;
0058     fLogicAbsor[i] = nullptr;
0059     fPhysiAbsor[i] = nullptr;
0060   }
0061
0062   // default parameter values of the calorimeter
0063   fNbOfAbsor = 2;
0064   fAbsorThickness[1] = 2.3 * mm;
0065   fAbsorThickness[2] = 5.7 * mm;
0066   fNbOfLayers = 50;
0067   fCalorSizeYZ = 40. * cm;
0068   ComputeCalorParameters();
0069
0070   // materials
0071   DefineMaterials();
0072   SetWorldMaterial("Galactic");
0073   SetAbsorMaterial(1, "G4_Pb");
0074   SetAbsorMaterial(2, "G4_lAr");
0075
0076   // create commands for interactive definition of the calorimeter
0077   fDetectorMessenger = new DetectorMessenger(this);
0078 }
0079
0080 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0081
0082 DetectorConstruction::~DetectorConstruction()
0083 {
0084   delete fDetectorMessenger;
0085 }
0086
0087 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0088
0089 void DetectorConstruction::DefineMaterials()
0090 {
0091   // This function illustrates the possible ways to define materials using
0092   // G4 database on G4Elements
0093   G4NistManager* manager = G4NistManager::Instance();
0094   manager->SetVerbose(0);
0095   //
0096   // define Elements
0097   //
0098   G4double z, a;
0099
0100   G4Element* H = manager->FindOrBuildElement(1);
0101   G4Element* C = manager->FindOrBuildElement(6);
0102   G4Element* N = manager->FindOrBuildElement(7);
0103   G4Element* O = manager->FindOrBuildElement(8);
0104   G4Element* Si = manager->FindOrBuildElement(14);
0105   G4Element* Ge = manager->FindOrBuildElement(32);
0106   G4Element* Sb = manager->FindOrBuildElement(51);
0107   G4Element* I = manager->FindOrBuildElement(53);
0108   G4Element* Cs = manager->FindOrBuildElement(55);
0109   G4Element* Pb = manager->FindOrBuildElement(82);
0110   G4Element* Bi = manager->FindOrBuildElement(83);
0111
0112   //
0113   // define an Element from isotopes, by relative abundance
0114   //
0115   G4int iz, n;  // iz=number of protons  in an isotope;
0116                 //  n=number of nucleons in an isotope;
0117   G4int ncomponents;
0118   G4double abundance;
0119
0120   G4Isotope* U5 = new G4Isotope("U235", iz = 92, n = 235, a = 235.01 * g / mole);
0121   G4Isotope* U8 = new G4Isotope("U238", iz = 92, n = 238, a = 238.03 * g / mole);
0122
0123   G4Element* U = new G4Element("enriched Uranium", "U", ncomponents = 2);
0124   U->AddIsotope(U5, abundance = 90. * perCent);
0125   U->AddIsotope(U8, abundance = 10. * perCent);
0126
0127   //
0128   // define simple materials
0129   //
0130   G4double density;
0131
0132   new G4Material("liquidH2", z = 1., a = 1.008 * g / mole, density = 70.8 * mg / cm3);
0133   new G4Material("Aluminium", z = 13., a = 26.98 * g / mole, density = 2.700 * g / cm3);
0134   new G4Material("Titanium", z = 22., a = 47.867 * g / mole, density = 4.54 * g / cm3);
0135   new G4Material("Iron", z = 26., a = 55.85 * g / mole, density = 7.870 * g / cm3);
0136   new G4Material("Copper", z = 29., a = 63.55 * g / mole, density = 8.960 * g / cm3);
0137   new G4Material("Tungsten", z = 74., a = 183.85 * g / mole, density = 19.30 * g / cm3);
0138   new G4Material("Gold", z = 79., a = 196.97 * g / mole, density = 19.32 * g / cm3);
0139   new G4Material("Uranium", z = 92., a = 238.03 * g / mole, density = 18.95 * g / cm3);
0140
0141   //
0142   // define a material from elements.   case 1: chemical molecule
0143   //
0144   G4int natoms;
0145
0146   G4Material* H2O = new G4Material("Water", density = 1.000 * g / cm3, ncomponents = 2);
0147   H2O->AddElement(H, natoms = 2);
0148   H2O->AddElement(O, natoms = 1);
0149   H2O->GetIonisation()->SetMeanExcitationEnergy(78.0 * eV);
0150   H2O->SetChemicalFormula("H_2O");
0151
0152   G4Material* CH = new G4Material("Polystyrene", density = 1.032 * g / cm3, ncomponents = 2);
0153   CH->AddElement(C, natoms = 1);
0154   CH->AddElement(H, natoms = 1);
0155
0156   G4Material* Sci = new G4Material("Scintillator", density = 1.032 * g / cm3, ncomponents = 2);
0157   Sci->AddElement(C, natoms = 9);
0158   Sci->AddElement(H, natoms = 10);
0159
0160   Sci->GetIonisation()->SetBirksConstant(0.126 * mm / MeV);
0161
0162   G4Material* Lct = new G4Material("Lucite", density = 1.185 * g / cm3, ncomponents = 3);
0163   Lct->AddElement(C, 59.97 * perCent);
0164   Lct->AddElement(H, 8.07 * perCent);
0165   Lct->AddElement(O, 31.96 * perCent);
0166
0167   G4Material* Sili = new G4Material("Silicon", density = 2.330 * g / cm3, ncomponents = 1);
0168   Sili->AddElement(Si, natoms = 1);
0169
0170   G4Material* SiO2 = new G4Material("quartz", density = 2.200 * g / cm3, ncomponents = 2);
0171   SiO2->AddElement(Si, natoms = 1);
0172   SiO2->AddElement(O, natoms = 2);
0173
0174   G4Material* G10 = new G4Material("NemaG10", density = 1.700 * g / cm3, ncomponents = 4);
0175   G10->AddElement(Si, natoms = 1);
0176   G10->AddElement(O, natoms = 2);
0177   G10->AddElement(C, natoms = 3);
0178   G10->AddElement(H, natoms = 3);
0179
0180   G4Material* CsI = new G4Material("CsI", density = 4.534 * g / cm3, ncomponents = 2);
0181   CsI->AddElement(Cs, natoms = 1);
0182   CsI->AddElement(I, natoms = 1);
0183   CsI->GetIonisation()->SetMeanExcitationEnergy(553.1 * eV);
0184
0185   G4Material* BGO = new G4Material("BGO", density = 7.10 * g / cm3, ncomponents = 3);
0186   BGO->AddElement(O, natoms = 12);
0187   BGO->AddElement(Ge, natoms = 3);
0188   BGO->AddElement(Bi, natoms = 4);
0189
0190   // SiNx
0191   density = 3.1 * g / cm3;
0192   G4Material* SiNx = new G4Material("SiNx", density, ncomponents = 3);
0193   SiNx->AddElement(Si, 300);
0194   SiNx->AddElement(N, 310);
0195   SiNx->AddElement(H, 6);
0196
0197   //
0198   // define gaseous materials using G4 NIST database
0199   //
0200   G4double fractionmass;
0201
0202   G4Material* Air = manager->FindOrBuildMaterial("G4_AIR");
0203   manager->ConstructNewGasMaterial("Air20", "G4_AIR", 293. * kelvin, 1. * atmosphere);
0204
0205   G4Material* lAr = manager->FindOrBuildMaterial("G4_lAr");
0206   G4Material* lArEm3 = new G4Material("liquidArgon", density = 1.390 * g / cm3, ncomponents = 1);
0207   lArEm3->AddMaterial(lAr, fractionmass = 1.0);
0208
0209   //
0210   // define a material from elements and others materials (mixture of mixtures)
0211   //
0212
0213   G4Material* Lead = new G4Material("Lead", density = 11.35 * g / cm3, ncomponents = 1);
0214   Lead->AddElement(Pb, fractionmass = 1.0);
0215
0216   G4Material* LeadSb = new G4Material("LeadSb", density = 11.35 * g / cm3, ncomponents = 2);
0217   LeadSb->AddElement(Sb, fractionmass = 4. * perCent);
0218   LeadSb->AddElement(Pb, fractionmass = 96. * perCent);
0219
0220   G4Material* Aerog = new G4Material("Aerogel", density = 0.200 * g / cm3, ncomponents = 3);
0221   Aerog->AddMaterial(SiO2, fractionmass = 62.5 * perCent);
0222   Aerog->AddMaterial(H2O, fractionmass = 37.4 * perCent);
0223   Aerog->AddElement(C, fractionmass = 0.1 * perCent);
0224
0225   //
0226   // examples of gas in non STP conditions
0227   //
0228   G4double temperature, pressure;
0229
0230   G4Material* CO2 =
0231     new G4Material("CarbonicGas", density = 27. * mg / cm3, ncomponents = 2, kStateGas,
0232                    temperature = 325. * kelvin, pressure = 50. * atmosphere);
0233   CO2->AddElement(C, natoms = 1);
0234   CO2->AddElement(O, natoms = 2);
0235
0236   G4Material* steam =
0237     new G4Material("WaterSteam", density = 1.0 * mg / cm3, ncomponents = 1, kStateGas,
0238                    temperature = 273 * kelvin, pressure = 1 * atmosphere);
0239   steam->AddMaterial(H2O, fractionmass = 1.);
0240
0241   new G4Material("ArgonGas", z = 18, a = 39.948 * g / mole, density = 1.782 * mg / cm3, kStateGas,
0242                  273.15 * kelvin, 1 * atmosphere);
0243   //
0244   // examples of vacuum
0245   //
0246
0247   density = universe_mean_density;  // from PhysicalConstants.h
0248   pressure = 3.e-18 * pascal;
0249   temperature = 2.73 * kelvin;
0250   new G4Material("Galactic", z = 1., a = 1.008 * g / mole, density, kStateGas, temperature,
0251                  pressure);
0252
0253   density = 1.e-5 * g / cm3;
0254   pressure = 2.e-2 * bar;
0255   temperature = STP_Temperature;  // from PhysicalConstants.h
0256   G4Material* beam =
0257     new G4Material("Beam", density, ncomponents = 1, kStateGas, temperature, pressure);
0258   beam->AddMaterial(Air, fractionmass = 1.);
0259
0260   //  G4cout << *(G4Material::GetMaterialTable()) << G4endl;
0261 }
0262
0263 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0264
0265 void DetectorConstruction::ComputeCalorParameters()
0266 {
0267   // Compute derived parameters of the calorimeter
0268   fLayerThickness = 0.;
0269   for (G4int iAbs = 1; iAbs <= fNbOfAbsor; iAbs++) {
0270     fLayerThickness += fAbsorThickness[iAbs];
0271   }
0272   fCalorThickness = fNbOfLayers * fLayerThickness;
0273   fWorldSizeX = 1.2 * fCalorThickness;
0274   fWorldSizeYZ = 1.2 * fCalorSizeYZ;
0275 }
0276
0277 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0278
0279 G4VPhysicalVolume* DetectorConstruction::Construct()
0280 {
0281   if (fPhysiWorld) {
0282     return fPhysiWorld;
0283   }
0284   // complete the Calor parameters definition
0285   ComputeCalorParameters();
0286
0287   //
0288   // World
0289   //
0290   fSolidWorld = new G4Box("World",  // its name
0291                           fWorldSizeX / 2, fWorldSizeYZ / 2, fWorldSizeYZ / 2);  // its size
0292
0293   fLogicWorld = new G4LogicalVolume(fSolidWorld,  // its solid
0294                                     fWorldMaterial,  // its material
0295                                     "World");  // its name
0296
0297   fPhysiWorld = new G4PVPlacement(0,  // no rotation
0298                                   G4ThreeVector(),  // at (0,0,0)
0299                                   fLogicWorld,  // its fLogical volume
0300                                   "World",  // its name
0301                                   0,  // its mother  volume
0302                                   false,  // no boolean operation
0303                                   0);  // copy number
0304   //
0305   // Calorimeter
0306   //
0307
0308   fSolidCalor = new G4Box("Calorimeter", fCalorThickness / 2, fCalorSizeYZ / 2, fCalorSizeYZ / 2);
0309
0310   fLogicCalor = new G4LogicalVolume(fSolidCalor, fWorldMaterial, "Calorimeter");
0311
0312   fPhysiCalor = new G4PVPlacement(0,  // no rotation
0313                                   G4ThreeVector(),  // at (0,0,0)
0314                                   fLogicCalor,  // its fLogical volume
0315                                   "Calorimeter",  // its name
0316                                   fLogicWorld,  // its mother  volume
0317                                   false,  // no boolean operation
0318                                   0);  // copy number
0319
0320   //
0321   // Layers
0322   //
0323
0324   fSolidLayer = new G4Box("Layer", fLayerThickness / 2, fCalorSizeYZ / 2, fCalorSizeYZ / 2);
0325
0326   fLogicLayer = new G4LogicalVolume(fSolidLayer, fWorldMaterial, "Layer");
0327   if (fNbOfLayers > 1) {
0328     fPhysiLayer =
0329       new G4PVReplica("Layer", fLogicLayer, fLogicCalor, kXAxis, fNbOfLayers, fLayerThickness);
0330   }
0331   else {
0332     fPhysiLayer =
0333       new G4PVPlacement(0, G4ThreeVector(), fLogicLayer, "Layer", fLogicCalor, false, 0);
0334   }
0335   //
0336   // Absorbers
0337   //
0338
0339   G4double xfront = -0.5 * fLayerThickness;
0340   for (G4int k = 1; k <= fNbOfAbsor; ++k) {
0341     fSolidAbsor[k] = new G4Box("Absorber",  // its name
0342                                fAbsorThickness[k] / 2, fCalorSizeYZ / 2, fCalorSizeYZ / 2);
0343
0344     fLogicAbsor[k] = new G4LogicalVolume(fSolidAbsor[k],  // its solid
0345                                          fAbsorMaterial[k],  // its material
0346                                          fAbsorMaterial[k]->GetName());
0347
0348     G4double xcenter = xfront + 0.5 * fAbsorThickness[k];
0349     xfront += fAbsorThickness[k];
0350     fPhysiAbsor[k] = new G4PVPlacement(0, G4ThreeVector(xcenter, 0., 0.), fLogicAbsor[k],
0351                                        fAbsorMaterial[k]->GetName(), fLogicLayer, false,
0352                                        k);  // copy number
0353   }
0354
0355   PrintCalorParameters();
0356
0357   // always return the fPhysical World
0358   //
0359   return fPhysiWorld;
0360 }
0361
0362 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0363
0364 void DetectorConstruction::PrintCalorParameters()
0365 {
0366   G4cout << "\n-------------------------------------------------------------"
0367          << "\n ---> The calorimeter is " << fNbOfLayers << " layers of:";
0368   for (G4int i = 1; i <= fNbOfAbsor; ++i) {
0369     G4cout << "\n \t" << std::setw(12) << fAbsorMaterial[i]->GetName() << ": " << std::setw(6)
0370            << G4BestUnit(fAbsorThickness[i], "Length");
0371   }
0372   G4cout << "\n-------------------------------------------------------------\n";
0373
0374   G4cout << "\n" << fWorldMaterial << G4endl;
0375   for (G4int j = 1; j <= fNbOfAbsor; ++j) {
0376     G4cout << "\n" << fAbsorMaterial[j] << G4endl;
0377   }
0378   G4cout << "\n-------------------------------------------------------------\n";
0379 }
0380
0381 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0382
0383 void DetectorConstruction::SetWorldMaterial(const G4String& material)
0384 {
0385   // search the material by its name
0386   G4Material* pttoMaterial = G4NistManager::Instance()->FindOrBuildMaterial(material);
0387   if (pttoMaterial) {
0388     fWorldMaterial = pttoMaterial;
0389     if (fLogicWorld) {
0390       fLogicWorld->SetMaterial(fWorldMaterial);
0391       fLogicLayer->SetMaterial(fWorldMaterial);
0392       G4RunManager::GetRunManager()->PhysicsHasBeenModified();
0393     }
0394   }
0395 }
0396
0397 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0398
0399 void DetectorConstruction::SetNbOfLayers(G4int ival)
0400 {
0401   // set the number of Layers
0402   //
0403   if (ival < 1) {
0404     G4cout << "\n --->warning from SetfNbOfLayers: " << ival
0405            << " must be at least 1. Command refused" << G4endl;
0406     return;
0407   }
0408   fNbOfLayers = ival;
0409 }
0410
0411 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0412
0413 void DetectorConstruction::SetNbOfAbsor(G4int ival)
0414 {
0415   // set the number of Absorbers
0416   //
0417   if (ival < 1 || ival > (kMaxAbsor - 1)) {
0418     G4cout << "\n ---> warning from SetfNbOfAbsor: " << ival << " must be at least 1 and and most "
0419            << kMaxAbsor - 1 << ". Command refused" << G4endl;
0420     return;
0421   }
0422   fNbOfAbsor = ival;
0423 }
0424
0425 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0426
0427 void DetectorConstruction::SetAbsorMaterial(G4int ival, const G4String& material)
0428 {
0429   // search the material by its name
0430   //
0431   if (ival > fNbOfAbsor || ival <= 0) {
0432     G4cout << "\n --->warning from SetAbsorMaterial: absor number " << ival
0433            << " out of range. Command refused" << G4endl;
0434     return;
0435   }
0436
0437   G4Material* pttoMaterial = G4NistManager::Instance()->FindOrBuildMaterial(material);
0438   if (pttoMaterial) {
0439     fAbsorMaterial[ival] = pttoMaterial;
0440     if (fLogicAbsor[ival]) {
0441       fLogicAbsor[ival]->SetMaterial(pttoMaterial);
0442       G4RunManager::GetRunManager()->PhysicsHasBeenModified();
0443     }
0444   }
0445 }
0446
0447 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0448
0449 void DetectorConstruction::SetAbsorThickness(G4int ival, G4double val)
0450 {
0451   // change Absorber thickness
0452   //
0453   if (ival > fNbOfAbsor || ival <= 0) {
0454     G4cout << "\n --->warning from SetAbsorThickness: absor number " << ival
0455            << " out of range. Command refused" << G4endl;
0456     return;
0457   }
0458   if (val <= DBL_MIN) {
0459     G4cout << "\n --->warning from SetAbsorThickness: thickness " << val
0460            << " out of range. Command refused" << G4endl;
0461     return;
0462   }
0463   fAbsorThickness[ival] = val;
0464 }
0465
0466 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0467
0468 void DetectorConstruction::SetCalorSizeYZ(G4double val)
0469 {
0470   // change the transverse size
0471   //
0472   if (val <= DBL_MIN) {
0473     G4cout << "\n --->warning from SetfCalorSizeYZ: thickness " << val
0474            << " out of range. Command refused" << G4endl;
0475     return;
0476   }
0477   fCalorSizeYZ = val;
0478 }
0479
0480 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0481
0482 #include "G4AutoDelete.hh"
0483 #include "G4GlobalMagFieldMessenger.hh"
0484
0485 void DetectorConstruction::ConstructSDandField()
0486 {
0487   if (fFieldMessenger.Get() == nullptr) {
0488     // Create global magnetic field messenger.
0489     // Uniform magnetic field is then created automatically if
0490     // the field value is not zero.
0491     G4ThreeVector fieldValue = G4ThreeVector();
0492     G4GlobalMagFieldMessenger* msg = new G4GlobalMagFieldMessenger(fieldValue);
0493     // msg->SetVerboseLevel(1);
0494     G4AutoDelete::Register(msg);
0495     fFieldMessenger.Put(msg);
0496   }
0497 }
0498
0499 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......