microyz/src/DetectorConstruction.cc

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0025 //
0026 // This example is provided by the Geant4-DNA collaboration
0027 // Any report or published results obtained using the Geant4-DNA software
0028 // shall cite the following Geant4-DNA collaboration publications:
0029 // Med. Phys. 45 (2018) e722-e739
0030 // Phys. Med. 31 (2015) 861-874
0031 // Med. Phys. 37 (2010) 4692-4708
0032 // Int. J. Model. Simul. Sci. Comput. 1 (2010) 157–178
0033 // The Geant4-DNA web site is available at http://geant4-dna.org
0034 //
0035 /// \file DetectorConstruction.cc
0036 /// \brief Implementation of the DetectorConstruction class
0037
0038 #include "DetectorConstruction.hh"
0039
0040 #include "DetectorMessenger.hh"
0041 #include "TrackerSD.hh"
0042
0043 #include "G4Box.hh"
0044 #include "G4GeometryManager.hh"
0045 #include "G4GeometryTolerance.hh"
0046 #include "G4NistManager.hh"
0047 #include "G4PVPlacement.hh"
0048 #include "G4SDManager.hh"
0049 #include "G4SystemOfUnits.hh"
0050 #include "G4UnitsTable.hh"
0051 #include "G4UserLimits.hh"
0052
0053 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0054
0055 DetectorConstruction::DetectorConstruction() : G4VUserDetectorConstruction()
0056 {
0057   // Create commands for interactive definition of the detector
0058   fDetectorMessenger = std::make_unique<DetectorMessenger>(this);
0059 }
0060
0061 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0062
0063 DetectorConstruction::~DetectorConstruction() = default;
0064
0065 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0066
0067 G4VPhysicalVolume* DetectorConstruction::Construct()
0068 {
0069   // Define materials
0070   DefineMaterials();
0071
0072   // Define volumes
0073   return DefineVolumes();
0074 }
0075
0076 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0077
0078 void DetectorConstruction::DefineMaterials()
0079 {
0080   // Water is defined from NIST material database
0081   G4NistManager* man = G4NistManager::Instance();
0082   G4Material* H2O = man->FindOrBuildMaterial("G4_WATER");
0083   fpWaterMaterial = H2O;
0084
0085   // Print materials
0086   G4cout << *(G4Material::GetMaterialTable()) << G4endl;
0087 }
0088
0089 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0090
0091 G4VPhysicalVolume* DetectorConstruction::DefineVolumes()
0092 {
0093   G4double worldLength = 10 * m;
0094
0095   // World
0096
0097   G4GeometryManager::GetInstance()->SetWorldMaximumExtent(worldLength);
0098
0099   G4cout << "Computed tolerance = "
0100          << G4GeometryTolerance::GetInstance()->GetSurfaceTolerance() / nm << " nm" << G4endl;
0101
0102   auto* worldS = new G4Box("world",  // its name
0103                            worldLength / 2, worldLength / 2, worldLength / 2);  // its size
0104
0105   auto* worldLV = new G4LogicalVolume(worldS,  // its solid
0106                                       fpWaterMaterial,  // its material
0107                                       "World_LV");  // its name
0108
0109   G4VPhysicalVolume* worldPV = new G4PVPlacement(nullptr,  // no rotation
0110                                                  G4ThreeVector(),  // at (0,0,0)
0111                                                  worldLV,  // its logical volume
0112                                                  "World",  // its name
0113                                                  nullptr,  // its mother  volume
0114                                                  false,  // no boolean operations
0115                                                  0,  // copy number
0116                                                  false);  // checking overlaps
0117
0118   worldLV->SetUserLimits(new G4UserLimits(fpMaxStepSize, DBL_MAX, DBL_MAX, fpTrackingCut));
0119
0120   PrintParameters();
0121
0122   return worldPV;
0123 }
0124
0125 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0126
0127 void DetectorConstruction::ConstructSDandField()
0128 {
0129   // Sensitive detector
0130
0131   G4String trackerChamberSDname = "TrackerChamberSD";
0132
0133   auto* aTrackerSD = new TrackerSD(trackerChamberSDname, "TrackerHitsCollection");
0134   aTrackerSD->SetRadius(fRadius);
0135
0136   G4SDManager::GetSDMpointer()->AddNewDetector(aTrackerSD);
0137
0138   SetSensitiveDetector("World_LV", aTrackerSD, true);
0139 }
0140
0141 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0142
0143 void DetectorConstruction::SetTrackingCut(const G4double& value)
0144 {
0145   fpTrackingCut = value;
0146 }
0147
0148 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0149
0150 void DetectorConstruction::SetMaxStepSize(const G4double& value)
0151 {
0152   fpMaxStepSize = value;
0153 }
0154
0155 void DetectorConstruction::SetTrackerSDRadius(const G4double& value)
0156 {
0157   fRadius = value;
0158 }
0159
0160 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0161
0162 void DetectorConstruction::PrintParameters() const
0163 {
0164   G4cout << "\n---------------------------------------------------------\n";
0165   G4cout << "---> The tracking cut is set to " << G4BestUnit(fpTrackingCut, "Energy") << G4endl;
0166   G4cout << "---> The maximum step size is set to " << G4BestUnit(fpMaxStepSize, "Length")
0167          << G4endl;
0168   G4cout << "---> The TrackerSD radius is set to " << G4BestUnit(fRadius, "Length") << G4endl;
0169   G4cout << "\n---------------------------------------------------------\n";
0170 }
0171
0172 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......