microprox/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 //
0034 // The Geant4-DNA web site is available at http://geant4-dna.org
0035 //
0036 /// \file DetectorConstruction.cc
0037 /// \brief Implementation of the DetectorConstruction class
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(), fDetectorMessenger(0)
0057 {
0058   // Default tracking cut
0059   fTrackingCut = 9 * eV;
0060
0061   // Create commands for interactive definition of the detector
0062   fDetectorMessenger = new DetectorMessenger(this);
0063 }
0064
0065 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0066
0067 DetectorConstruction::~DetectorConstruction()
0068 {
0069   delete fDetectorMessenger;
0070 }
0071
0072 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0073
0074 G4VPhysicalVolume* DetectorConstruction::Construct()
0075 {
0076   // Define materials
0077   DefineMaterials();
0078
0079   // Define volumes
0080   return DefineVolumes();
0081 }
0082
0083 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0084
0085 void DetectorConstruction::DefineMaterials()
0086 {
0087   // Water is defined from NIST material database
0088   G4NistManager* man = G4NistManager::Instance();
0089
0090   G4Material* H2O = man->FindOrBuildMaterial("G4_WATER");
0091
0092   fWaterMaterial = H2O;
0093
0094   // Print materials
0095   G4cout << *(G4Material::GetMaterialTable()) << G4endl;
0096 }
0097
0098 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0099
0100 G4VPhysicalVolume* DetectorConstruction::DefineVolumes()
0101 {
0102   G4double worldLength = 1 * km;
0103
0104   // World
0105
0106   G4GeometryManager::GetInstance()->SetWorldMaximumExtent(worldLength);
0107
0108   G4cout << "Computed tolerance = "
0109          << G4GeometryTolerance::GetInstance()->GetSurfaceTolerance() / nm << " nm" << G4endl;
0110
0111   G4Box* worldS = new G4Box("world",  // its name
0112                             worldLength / 2, worldLength / 2, worldLength / 2);  // its size
0113
0114   G4LogicalVolume* worldLV = new G4LogicalVolume(worldS,  // its solid
0115                                                  fWaterMaterial,  // its material
0116                                                  "World_LV");  // its name
0117
0118   G4VPhysicalVolume* worldPV = new G4PVPlacement(0,  // no rotation
0119                                                  G4ThreeVector(),  // at (0,0,0)
0120                                                  worldLV,  // its logical volume
0121                                                  "World",  // its name
0122                                                  0,  // its mother  volume
0123                                                  false,  // no boolean operations
0124                                                  0,  // copy number
0125                                                  false);  // checking overlaps
0126
0127   worldLV->SetUserLimits(new G4UserLimits(DBL_MAX, DBL_MAX, DBL_MAX, fTrackingCut));
0128
0129   PrintParameters();
0130
0131   return worldPV;
0132 }
0133
0134 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0135
0136 void DetectorConstruction::ConstructSDandField()
0137 {
0138   // Sensitive detectors
0139
0140   G4String trackerChamberSDname = "TrackerChamberSD";
0141
0142   TrackerSD* aTrackerSD = new TrackerSD(trackerChamberSDname, "TrackerHitsCollection");
0143
0144   G4SDManager::GetSDMpointer()->AddNewDetector(aTrackerSD);
0145
0146   SetSensitiveDetector("World_LV", aTrackerSD, true);
0147 }
0148
0149 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0150
0151 void DetectorConstruction::SetTrackingCut(G4double value)
0152 {
0153   fTrackingCut = value;
0154 }
0155
0156 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0157
0158 void DetectorConstruction::PrintParameters() const
0159 {
0160   G4cout << "\n---------------------------------------------------------\n";
0161   G4cout << "---> The tracking cut is set to " << G4BestUnit(fTrackingCut, "Energy") << G4endl;
0162   G4cout << "\n---------------------------------------------------------\n";
0163 }
0164
0165 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......