Hadr08/src/DetectorConstruction.cc

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0026 /// \file DetectorConstruction.cc
0027 /// \brief Implementation of the DetectorConstruction class
0028 //
0029 //
0030
0031 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0032 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0033
0034 #include "DetectorConstruction.hh"
0035
0036 #include "BiasingOperator.hh"
0037
0038 #include "G4Box.hh"
0039 #include "G4Element.hh"
0040 #include "G4ElementTable.hh"
0041 #include "G4LogicalVolume.hh"
0042 #include "G4Material.hh"
0043 #include "G4MaterialTable.hh"
0044 #include "G4NistManager.hh"
0045 #include "G4PVPlacement.hh"
0046 #include "G4ProductionCuts.hh"
0047 #include "G4Region.hh"
0048 #include "G4RegionStore.hh"
0049 #include "G4SDManager.hh"
0050 #include "G4SystemOfUnits.hh"
0051 #include "G4ThreeVector.hh"
0052 #include "G4Tubs.hh"
0053
0054 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0055
0056 DetectorConstruction::DetectorConstruction()
0057   : G4VUserDetectorConstruction(),
0058     fSiliconTrackerLogical(nullptr),
0059     fEmCaloLogical(nullptr),
0060     fHadCaloLogical(nullptr)
0061 {}
0062
0063 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0064
0065 DetectorConstruction::~DetectorConstruction() {}
0066
0067 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0068
0069 G4VPhysicalVolume* DetectorConstruction::Construct()
0070 {
0071   G4cout << "\nDetectorConstruction....\n" << G4endl;
0072
0073   //--------- Material definition ---------
0074   G4NistManager* nistManager = G4NistManager::Instance();
0075   G4Material* air = nistManager->FindOrBuildMaterial("G4_AIR");
0076   G4Material* csi = nistManager->FindOrBuildMaterial("G4_CESIUM_IODIDE");
0077   G4Material* silicon = nistManager->FindOrBuildMaterial("G4_Si");
0078   G4Material* iron = nistManager->FindOrBuildMaterial("G4_Fe");
0079
0080   // World
0081   G4Box* worldBox = new G4Box("WorldBox", 200.0 * cm, 200.0 * cm, 200.0 * cm);
0082   G4LogicalVolume* worldLogical = new G4LogicalVolume(worldBox, air, "WorldLogical", 0, 0, 0);
0083   G4PVPlacement* worldPhys =
0084     new G4PVPlacement(0, G4ThreeVector(), "WorldPhysical", worldLogical, 0, false, 0);
0085
0086   // Silicon Tracker: for simplicity and to have more hadronic interactions,
0087   //                  it is single layer of silicon (20 cm thick)
0088   G4double halfDetectorXYsize = 100.0 * cm;
0089   G4Box* siliconBox = new G4Box("siliconBox", halfDetectorXYsize, halfDetectorXYsize, 10.0 * cm);
0090   fSiliconTrackerLogical =
0091     new G4LogicalVolume(siliconBox, silicon, "SiliconTrackerLogical", 0, 0, 0);
0092   new G4PVPlacement(0, G4ThreeVector(0.0, 0.0, 0.0), "SiliconTrackerPhysical",
0093                     fSiliconTrackerLogical, worldPhys, false, 0);
0094
0095   // Electromagnetic (EM) calorimeter: an homogeneous crystal (40 cm thick)
0096   G4Box* emCaloBox = new G4Box("EmCaloBox", halfDetectorXYsize, halfDetectorXYsize, 20.0 * cm);
0097   fEmCaloLogical = new G4LogicalVolume(emCaloBox, csi, "EmCalorimeterLogical", 0, 0, 0);
0098   new G4PVPlacement(0, G4ThreeVector(0.0, 0.0, 35.0 * cm), "EmCalorimeterPhysical", fEmCaloLogical,
0099                     worldPhys, false, 0);
0100
0101   // The hadronic (HAD) calorimeter: an homogeneous block of metal (100 cm thick)
0102   G4Box* hadCaloBox = new G4Box("HadCaloBox", halfDetectorXYsize, halfDetectorXYsize, 50.0 * cm);
0103   fHadCaloLogical = new G4LogicalVolume(hadCaloBox, iron, "HadCaloLogical", 0, 0, 0);
0104   new G4PVPlacement(0, G4ThreeVector(0.0, 0.0, 110.0 * cm), "HadCaloPhysical", fHadCaloLogical,
0105                     worldPhys, false, 0);
0106
0107   // Define the tracker region
0108   G4Region* trackerRegion = new G4Region("Tracker_region");
0109   trackerRegion->AddRootLogicalVolume(fSiliconTrackerLogical);
0110   std::vector<double> cuts;
0111   cuts.push_back(10.0 * cm);
0112   cuts.push_back(10.0 * cm);
0113   cuts.push_back(10.0 * cm);
0114   cuts.push_back(10.0 * cm);
0115   trackerRegion->SetProductionCuts(new G4ProductionCuts);
0116   trackerRegion->GetProductionCuts()->SetProductionCuts(cuts);
0117
0118   // Define the EM calorimeter region
0119   G4Region* emCaloRegion = new G4Region("EM_calo_region");
0120   emCaloRegion->AddRootLogicalVolume(fEmCaloLogical);
0121   cuts.clear();
0122   cuts.push_back(20.0 * cm);
0123   cuts.push_back(20.0 * cm);
0124   cuts.push_back(20.0 * cm);
0125   cuts.push_back(20.0 * cm);
0126   emCaloRegion->SetProductionCuts(new G4ProductionCuts);
0127   emCaloRegion->GetProductionCuts()->SetProductionCuts(cuts);
0128
0129   // Define the HAD calorimeter region
0130   G4Region* hadCaloRegion = new G4Region("HAD_calo_region");
0131   hadCaloRegion->AddRootLogicalVolume(fHadCaloLogical);
0132   cuts.clear();
0133   cuts.push_back(50.0 * cm);
0134   cuts.push_back(50.0 * cm);
0135   cuts.push_back(50.0 * cm);
0136   cuts.push_back(50.0 * cm);
0137   hadCaloRegion->SetProductionCuts(new G4ProductionCuts);
0138   hadCaloRegion->GetProductionCuts()->SetProductionCuts(cuts);
0139
0140   return worldPhys;
0141 }
0142
0143 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0144
0145 void DetectorConstruction::ConstructSDandField()
0146 {
0147   // Instanciate the biasing operator and specify the particles of interest (i.e. p, n, pi+, pi-)
0148   // and the logical volume(s) where this operator should be applied.
0149   BiasingOperator* biasingOperator = new BiasingOperator;
0150   biasingOperator->AddParticle("proton");
0151   biasingOperator->AddParticle("neutron");
0152   biasingOperator->AddParticle("pi+");
0153   biasingOperator->AddParticle("pi-");
0154   biasingOperator->AttachTo(fSiliconTrackerLogical);
0155 }
0156
0157 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......