microyz/src/DetectorConstruction.cc

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0025 //
0026 /// \file DetectorConstruction.cc
0027 /// \brief Implementation of the DetectorConstruction class
0028
0029 // This example is provided by the Geant4-DNA collaboration
0030 // Any report or published results obtained using the Geant4-DNA software
0031 // shall cite the following Geant4-DNA collaboration publications:
0032 // Med. Phys. 45 (2018) e722-e739
0033 // Phys. Med. 31 (2015) 861-874
0034 // Med. Phys. 37 (2010) 4692-4708
0035 // Int. J. Model. Simul. Sci. Comput. 1 (2010) 157–178
0036 // The Geant4-DNA web site is available at http://geant4-dna.org
0037 //
0038
0039 #include "DetectorConstruction.hh"
0040
0041 #include "DetectorMessenger.hh"
0042 #include "TrackerSD.hh"
0043
0044 #include "G4Box.hh"
0045 #include "G4GeometryManager.hh"
0046 #include "G4GeometryTolerance.hh"
0047 #include "G4NistManager.hh"
0048 #include "G4PVPlacement.hh"
0049 #include "G4SDManager.hh"
0050 #include "G4SystemOfUnits.hh"
0051 #include "G4UnitsTable.hh"
0052 #include "G4UserLimits.hh"
0053
0054 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0055
0056 DetectorConstruction::DetectorConstruction() : G4VUserDetectorConstruction()
0057 {
0058   // Create commands for interactive definition of the detector
0059   fDetectorMessenger = std::make_unique<DetectorMessenger>(this);
0060 }
0061
0062 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0063
0064 DetectorConstruction::~DetectorConstruction() = default;
0065
0066 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0067
0068 G4VPhysicalVolume* DetectorConstruction::Construct()
0069 {
0070   // Define materials
0071   DefineMaterials();
0072
0073   // Define volumes
0074   return DefineVolumes();
0075 }
0076
0077 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0078
0079 void DetectorConstruction::DefineMaterials()
0080 {
0081   // Water is defined from NIST material database
0082   G4NistManager* man = G4NistManager::Instance();
0083   G4Material* H2O = man->FindOrBuildMaterial("G4_WATER");
0084   fpWaterMaterial = H2O;
0085
0086   // Print materials
0087   G4cout << *(G4Material::GetMaterialTable()) << G4endl;
0088 }
0089
0090 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0091
0092 G4VPhysicalVolume* DetectorConstruction::DefineVolumes()
0093 {
0094   G4double worldLength = 10 * m;
0095
0096   // World
0097
0098   G4GeometryManager::GetInstance()->SetWorldMaximumExtent(worldLength);
0099
0100   G4cout << "Computed tolerance = "
0101          << G4GeometryTolerance::GetInstance()->GetSurfaceTolerance() / nm << " nm" << G4endl;
0102
0103   auto* worldS = new G4Box("world",  // its name
0104                            worldLength / 2, worldLength / 2, worldLength / 2);  // its size
0105
0106   auto* worldLV = new G4LogicalVolume(worldS,  // its solid
0107                                       fpWaterMaterial,  // its material
0108                                       "World_LV");  // its name
0109
0110   G4VPhysicalVolume* worldPV = new G4PVPlacement(nullptr,  // no rotation
0111                                                  G4ThreeVector(),  // at (0,0,0)
0112                                                  worldLV,  // its logical volume
0113                                                  "World",  // its name
0114                                                  nullptr,  // its mother  volume
0115                                                  false,  // no boolean operations
0116                                                  0,  // copy number
0117                                                  false);  // checking overlaps
0118
0119   worldLV->SetUserLimits(new G4UserLimits(fpMaxStepSize, DBL_MAX, DBL_MAX, fpTrackingCut));
0120
0121   PrintParameters();
0122
0123   return worldPV;
0124 }
0125
0126 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0127
0128 void DetectorConstruction::ConstructSDandField()
0129 {
0130   // Sensitive detector
0131
0132   G4String trackerChamberSDname = "TrackerChamberSD";
0133
0134   auto* aTrackerSD = new TrackerSD(trackerChamberSDname, "TrackerHitsCollection");
0135   aTrackerSD->SetRadius(fRadius);
0136
0137   G4SDManager::GetSDMpointer()->AddNewDetector(aTrackerSD);
0138
0139   SetSensitiveDetector("World_LV", aTrackerSD, true);
0140 }
0141
0142 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0143
0144 void DetectorConstruction::SetTrackingCut(const G4double& value)
0145 {
0146   fpTrackingCut = value;
0147 }
0148
0149 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0150
0151 void DetectorConstruction::SetMaxStepSize(const G4double& value)
0152 {
0153   fpMaxStepSize = value;
0154 }
0155
0156 void DetectorConstruction::SetTrackerSDRadius(const G4double& value)
0157 {
0158   fRadius = value;
0159 }
0160
0161 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0162
0163 void DetectorConstruction::PrintParameters() const
0164 {
0165   G4cout << "\n---------------------------------------------------------\n";
0166   G4cout << "---> The tracking cut is set to " << G4BestUnit(fpTrackingCut, "Energy") << G4endl;
0167   G4cout << "---> The maximum step size is set to " << G4BestUnit(fpMaxStepSize, "Length")
0168          << G4endl;
0169   G4cout << "---> The TrackerSD radius is set to " << G4BestUnit(fRadius, "Length") << G4endl;
0170   G4cout << "\n---------------------------------------------------------\n";
0171 }
0172
0173 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......