field03/src/F03DetectorConstruction.cc

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0025 //
0026 /// \file F03DetectorConstruction.cc
0027 /// \brief Implementation of the F03DetectorConstruction class
0028
0029 #include "F03DetectorConstruction.hh"
0030
0031 #include "F03CalorimeterSD.hh"
0032 #include "F03DetectorMessenger.hh"
0033
0034 #include "G4AutoDelete.hh"
0035 #include "G4GeometryManager.hh"
0036 #include "G4FieldBuilder.hh"
0037 #include "G4LogicalVolume.hh"
0038 #include "G4LogicalVolumeStore.hh"
0039 #include "G4Material.hh"
0040 #include "G4PVPlacement.hh"
0041 #include "G4PhysicalConstants.hh"
0042 #include "G4PhysicalVolumeStore.hh"
0043 #include "G4RunManager.hh"
0044 #include "G4SDManager.hh"
0045 #include "G4SolidStore.hh"
0046 #include "G4SystemOfUnits.hh"
0047 #include "G4Tubs.hh"
0048 #include "G4UniformMagField.hh"
0049
0050 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0051
0052 F03DetectorConstruction::F03DetectorConstruction()
0053 {
0054   fDetectorMessenger = new F03DetectorMessenger(this);
0055
0056   // create field builder
0057   // this will create commands for field parameters
0058   G4FieldBuilder* fieldBuilder = G4FieldBuilder::Instance();
0059   // fieldBuilder->SetVerboseLevel(2);
0060
0061   auto globalFieldParameters = fieldBuilder->GetFieldParameters();
0062   auto localFieldParameters = fieldBuilder->CreateFieldParameters("Radiator");
0063
0064   // set default min step 0.25 mm
0065   globalFieldParameters->SetMinimumStep(0.25 * mm);
0066   localFieldParameters->SetMinimumStep(0.25 * mm);
0067
0068   // create materials
0069   DefineMaterials();
0070 }
0071
0072 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0073
0074 F03DetectorConstruction::~F03DetectorConstruction()
0075 {
0076   delete fDetectorMessenger;
0077 }
0078
0079 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0080
0081 G4VPhysicalVolume* F03DetectorConstruction::Construct()
0082 {
0083   return ConstructCalorimeter();
0084 }
0085
0086 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0087
0088 void F03DetectorConstruction::DefineMaterials()
0089 {
0090   // This function illustrates the possible ways to define materials
0091
0092   G4String name, symbol;  // a=mass of a mole;
0093   G4double a, z, density;  // z=mean number of protons;
0094   G4int nel;
0095   G4int ncomponents;
0096   G4double fractionmass, pressure, temperature;
0097
0098   //
0099   // define Elements
0100   //
0101
0102   a = 1.01 * g / mole;
0103   auto elH = new G4Element(name = "Hydrogen", symbol = "H", z = 1., a);
0104
0105   a = 12.01 * g / mole;
0106   auto elC = new G4Element(name = "Carbon", symbol = "C", z = 6., a);
0107
0108   a = 14.01 * g / mole;
0109   auto elN = new G4Element(name = "Nitrogen", symbol = "N", z = 7., a);
0110
0111   a = 16.00 * g / mole;
0112   auto elO = new G4Element(name = "Oxygen", symbol = "O", z = 8., a);
0113
0114   a = 39.948 * g / mole;
0115   auto elAr = new G4Element(name = "Argon", symbol = "Ar", z = 18., a);
0116
0117   //
0118   // define simple materials
0119   //
0120
0121   // Mylar
0122
0123   density = 1.39 * g / cm3;
0124   auto mylar = new G4Material(name = "Mylar", density, nel = 3);
0125   mylar->AddElement(elO, 2);
0126   mylar->AddElement(elC, 5);
0127   mylar->AddElement(elH, 4);
0128
0129   // Polypropelene
0130
0131   auto CH2 = new G4Material("Polypropelene", 0.91 * g / cm3, 2);
0132   CH2->AddElement(elH, 2);
0133   CH2->AddElement(elC, 1);
0134
0135   // Krypton as detector gas, STP
0136
0137   density = 3.700 * mg / cm3;
0138   a = 83.80 * g / mole;
0139   auto Kr = new G4Material(name = "Kr", z = 36., a, density);
0140
0141   // Dry air (average composition)
0142
0143   density = 1.7836 * mg / cm3;  // STP
0144   auto argon = new G4Material(name = "Argon", density, ncomponents = 1);
0145   argon->AddElement(elAr, 1);
0146
0147   density = 1.25053 * mg / cm3;  // STP
0148   auto nitrogen = new G4Material(name = "N2", density, ncomponents = 1);
0149   nitrogen->AddElement(elN, 2);
0150
0151   density = 1.4289 * mg / cm3;  // STP
0152   auto oxygen = new G4Material(name = "O2", density, ncomponents = 1);
0153   oxygen->AddElement(elO, 2);
0154
0155   density = 1.2928 * mg / cm3;  // STP
0156   density *= 1.0e-8;  // pumped vacuum
0157   temperature = STP_Temperature;
0158   pressure = 1.0e-8 * STP_Pressure;
0159
0160   auto air =
0161     new G4Material(name = "Air", density, ncomponents = 3, kStateGas, temperature, pressure);
0162   air->AddMaterial(nitrogen, fractionmass = 0.7557);
0163   air->AddMaterial(oxygen, fractionmass = 0.2315);
0164   air->AddMaterial(argon, fractionmass = 0.0128);
0165
0166   // Xenon as detector gas, STP
0167
0168   density = 5.858 * mg / cm3;
0169   a = 131.29 * g / mole;
0170   auto Xe = new G4Material(name = "Xenon", z = 54., a, density);
0171
0172   // Carbon dioxide, STP
0173
0174   density = 1.842 * mg / cm3;
0175   auto CarbonDioxide = new G4Material(name = "CO2", density, nel = 2);
0176   CarbonDioxide->AddElement(elC, 1);
0177   CarbonDioxide->AddElement(elO, 2);
0178
0179   // 80% Xe + 20% CO2, STP
0180
0181   density = 5.0818 * mg / cm3;
0182   auto Xe20CO2 = new G4Material(name = "Xe20CO2", density, ncomponents = 2);
0183   Xe20CO2->AddMaterial(Xe, fractionmass = 0.922);
0184   Xe20CO2->AddMaterial(CarbonDioxide, fractionmass = 0.078);
0185
0186   // 80% Kr + 20% CO2, STP
0187
0188   density = 3.601 * mg / cm3;
0189   auto Kr20CO2 = new G4Material(name = "Kr20CO2", density, ncomponents = 2);
0190   Kr20CO2->AddMaterial(Kr, fractionmass = 0.89);
0191   Kr20CO2->AddMaterial(CarbonDioxide, fractionmass = 0.11);
0192
0193   G4cout << *(G4Material::GetMaterialTable()) << G4endl;
0194
0195   // default materials of the calorimeter and TR radiator
0196
0197   fRadiatorMat = air;  // CH2 ;   // mylar;
0198
0199   fAbsorberMaterial = air;  //  Kr20CO2;   // XeCO2CF4;
0200
0201   fWorldMaterial = air;
0202 }
0203
0204 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0205
0206 G4VPhysicalVolume* F03DetectorConstruction::ConstructCalorimeter()
0207 {
0208   // Cleanup old geometry
0209
0210   if (fPhysiWorld) {
0211     G4GeometryManager::GetInstance()->OpenGeometry();
0212     G4PhysicalVolumeStore::GetInstance()->Clean();
0213     G4LogicalVolumeStore::GetInstance()->Clean();
0214     G4SolidStore::GetInstance()->Clean();
0215   }
0216
0217   // complete the Calor parameters definition and Print
0218
0219   ComputeCalorParameters();
0220   PrintCalorParameters();
0221
0222   G4bool checkOverlaps = true;
0223
0224   fSolidWorld = new G4Tubs("World",  // its name
0225                            0., fWorldSizeR, fWorldSizeZ / 2., 0., twopi);  // its size
0226
0227   fLogicWorld = new G4LogicalVolume(fSolidWorld,  // its solid
0228                                     fWorldMaterial,  // its material
0229                                     "World");  // its name
0230
0231   fPhysiWorld = new G4PVPlacement(nullptr,  // no rotation
0232                                   G4ThreeVector(),  // at (0,0,0)
0233                                   "World",  // its name
0234                                   fLogicWorld,  // its logical volume
0235                                   nullptr,  // its mother  volume
0236                                   false,  // no boolean op.
0237                                   0,  // copy number
0238                                   checkOverlaps);  // checkOverlaps
0239
0240   // TR radiator envelope
0241   G4double radThick = fFoilNumber * (fRadThickness + fGasGap) + fDetGap;
0242   G4double zRad = fZAbsorber - 0.5 * (radThick + fAbsorberThickness);
0243
0244   G4cout << "zRad = " << zRad / mm << " mm" << G4endl;
0245   G4cout << "radThick = " << radThick / mm << " mm" << G4endl;
0246   G4cout << "fFoilNumber = " << fFoilNumber << G4endl;
0247   G4cout << "fRadiatorMat = " << fRadiatorMat->GetName() << G4endl;
0248   G4cout << "WorldMaterial = " << fWorldMaterial->GetName() << G4endl;
0249
0250   fSolidRadiator = new G4Tubs("Radiator", 0.0, fAbsorberRadius, 0.5 * radThick, 0.0, twopi);
0251
0252   fLogicRadiator = new G4LogicalVolume(fSolidRadiator, fWorldMaterial, "Radiator");
0253
0254   fPhysiRadiator = new G4PVPlacement(nullptr, G4ThreeVector(0, 0, zRad), "Radiator", fLogicRadiator,
0255                                      fPhysiWorld, false, 0, checkOverlaps);
0256
0257   fSolidRadSlice = new G4Tubs("RadSlice", 0.0, fAbsorberRadius, 0.5 * fRadThickness, 0.0, twopi);
0258
0259   fLogicRadSlice = new G4LogicalVolume(fSolidRadSlice, fRadiatorMat, "RadSlice");
0260
0261   // Radiator slice
0262   G4double radSliceThick = fRadThickness + fGasGap;
0263   G4double zStart = 0.5 * (-radThick + radSliceThick) + fDetGap;
0264   // start on the board of radiator enevelope + det gap
0265
0266   for (G4int j = 0; j < fFoilNumber; j++) {
0267     G4double zSlice = zStart + j * radSliceThick;
0268     G4cout << zSlice / mm << " mm"
0269            << "\t";
0270
0271     fPhysiRadSlice = new G4PVPlacement(nullptr, G4ThreeVector(0., 0., zSlice), "RadSlice",
0272                                        fLogicRadSlice, fPhysiRadiator, false, j, checkOverlaps);
0273   }
0274   G4cout << G4endl;
0275
0276   // Absorber
0277
0278   fSolidAbsorber =
0279     new G4Tubs("Absorber", 1.0 * mm, fAbsorberRadius, fAbsorberThickness / 2., 0.0, twopi);
0280
0281   fLogicAbsorber = new G4LogicalVolume(fSolidAbsorber, fAbsorberMaterial, "Absorber");
0282
0283   fPhysiAbsorber = new G4PVPlacement(nullptr, G4ThreeVector(0., 0., fZAbsorber), "Absorber",
0284                                      fLogicAbsorber, fPhysiWorld, false, 0, checkOverlaps);
0285
0286   return fPhysiWorld;
0287 }
0288
0289 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0290
0291 void F03DetectorConstruction::PrintCalorParameters()
0292 {
0293   G4cout << "\n The  WORLD   is made of " << fWorldSizeZ / mm << "mm of "
0294          << fWorldMaterial->GetName();
0295   G4cout << ", the transverse size (R) of the world is " << fWorldSizeR / mm << " mm. " << G4endl;
0296   G4cout << " The ABSORBER is made of " << fAbsorberThickness / mm << "mm of "
0297          << fAbsorberMaterial->GetName();
0298   G4cout << ", the transverse size (R) is " << fAbsorberRadius / mm << " mm. " << G4endl;
0299   G4cout << " Z position of the (middle of the) absorber " << fZAbsorber / mm << "  mm." << G4endl;
0300   G4cout << G4endl;
0301 }
0302
0303 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0304
0305 void F03DetectorConstruction::SetAbsorberMaterial(G4String materialChoice)
0306 {
0307   // get the pointer to the material table
0308   const G4MaterialTable* theMaterialTable = G4Material::GetMaterialTable();
0309
0310   // search the material by its name
0311   G4Material* material;
0312   for (size_t j = 0; j < theMaterialTable->size(); j++) {
0313     material = (*theMaterialTable)[j];
0314     if (material->GetName() == materialChoice) {
0315       fAbsorberMaterial = material;
0316       fLogicAbsorber->SetMaterial(material);
0317       G4RunManager::GetRunManager()->PhysicsHasBeenModified();
0318     }
0319   }
0320 }
0321
0322 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0323
0324 void F03DetectorConstruction::SetWorldMaterial(G4String materialChoice)
0325 {
0326   // get the pointer to the material table
0327   const G4MaterialTable* theMaterialTable = G4Material::GetMaterialTable();
0328
0329   // search the material by its name
0330   G4Material* material;
0331   for (size_t j = 0; j < theMaterialTable->size(); j++) {
0332     material = (*theMaterialTable)[j];
0333     if (material->GetName() == materialChoice) {
0334       fWorldMaterial = material;
0335       fLogicWorld->SetMaterial(material);
0336       G4RunManager::GetRunManager()->PhysicsHasBeenModified();
0337     }
0338   }
0339 }
0340
0341 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0342
0343 void F03DetectorConstruction::SetAbsorberThickness(G4double val)
0344 {
0345   // change Absorber thickness and recompute the calorimeter parameters
0346   fAbsorberThickness = val;
0347   ComputeCalorParameters();
0348   G4RunManager::GetRunManager()->GeometryHasBeenModified();
0349 }
0350
0351 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0352
0353 void F03DetectorConstruction::SetAbsorberRadius(G4double val)
0354 {
0355   // change the transverse size and recompute the calorimeter parameters
0356   fAbsorberRadius = val;
0357   ComputeCalorParameters();
0358   G4RunManager::GetRunManager()->GeometryHasBeenModified();
0359 }
0360
0361 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0362
0363 void F03DetectorConstruction::SetWorldSizeZ(G4double val)
0364 {
0365   fWorldSizeZ = val;
0366   ComputeCalorParameters();
0367   G4RunManager::GetRunManager()->GeometryHasBeenModified();
0368 }
0369
0370 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0371
0372 void F03DetectorConstruction::SetWorldSizeR(G4double val)
0373 {
0374   fWorldSizeR = val;
0375   ComputeCalorParameters();
0376   G4RunManager::GetRunManager()->GeometryHasBeenModified();
0377 }
0378
0379 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0380
0381 void F03DetectorConstruction::SetAbsorberZpos(G4double val)
0382 {
0383   fZAbsorber = val;
0384   ComputeCalorParameters();
0385   G4RunManager::GetRunManager()->GeometryHasBeenModified();
0386 }
0387
0388 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0389
0390 void F03DetectorConstruction::SetFieldValue(G4ThreeVector value)
0391 {
0392   fFieldVector = value;
0393
0394   G4UniformMagField* magField = nullptr;
0395   if (fFieldVector != G4ThreeVector(0.,0.,0.)) {
0396     magField = new G4UniformMagField(fFieldVector);
0397   }
0398
0399   // Set field to the field builder
0400   auto fieldBuilder = G4FieldBuilder::Instance();
0401   fieldBuilder->SetGlobalField(magField);
0402 }
0403
0404 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0405
0406
0407 void F03DetectorConstruction::SetLocalFieldValue(G4ThreeVector value)
0408 {
0409   fLocalFieldVector = value;
0410
0411   G4UniformMagField* magField = nullptr;
0412   if (fLocalFieldVector != G4ThreeVector(0.,0.,0.)) {
0413     magField = new G4UniformMagField(fLocalFieldVector);
0414   }
0415
0416   // Set field to the field builder
0417   auto fieldBuilder = G4FieldBuilder::Instance();
0418   fieldBuilder->SetLocalField(magField, fLogicRadiator);
0419 }
0420
0421 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0422
0423 void F03DetectorConstruction::ConstructSDandField()
0424 {
0425   // Sensitive Detectors: Absorber
0426
0427   if (!fCalorimeterSD.Get()) {
0428     auto calorimeterSD = new F03CalorimeterSD("CalorSD", this);
0429     fCalorimeterSD.Put(calorimeterSD);
0430   }
0431   G4SDManager::GetSDMpointer()->AddNewDetector(fCalorimeterSD.Get());
0432   SetSensitiveDetector(fLogicAbsorber, fCalorimeterSD.Get());
0433
0434   // Create detector fields
0435   SetFieldValue(fFieldVector);
0436   SetLocalFieldValue(fLocalFieldVector);
0437
0438   // Construct all Geant4 field objects
0439   auto fieldBuilder = G4FieldBuilder::Instance();
0440   fieldBuilder->ConstructFieldSetup();
0441 }
0442
0443 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......