GB05/src/GB05DetectorConstruction.cc

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0026 //
0027 /// \file GB05DetectorConstruction.cc
0028 /// \brief Implementation of the GB05DetectorConstruction class
0029
0030 #include "GB05DetectorConstruction.hh"
0031
0032 #include "GB05BOptrSplitAndKillByCrossSection.hh"
0033 #include "GB05SD.hh"
0034
0035 #include "G4Box.hh"
0036 #include "G4LogicalVolume.hh"
0037 #include "G4LogicalVolumeStore.hh"
0038 #include "G4Material.hh"
0039 #include "G4NistManager.hh"
0040 #include "G4PVPlacement.hh"
0041 #include "G4SDManager.hh"
0042 #include "G4SystemOfUnits.hh"
0043
0044 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0045
0046 GB05DetectorConstruction::GB05DetectorConstruction() : G4VUserDetectorConstruction() {}
0047
0048 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0049
0050 GB05DetectorConstruction::~GB05DetectorConstruction() {}
0051
0052 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0053
0054 G4VPhysicalVolume* GB05DetectorConstruction::Construct()
0055 {
0056   // -- Collect a few materials from NIST database:
0057   auto nistManager = G4NistManager::Instance();
0058   G4Material* worldMaterial = nistManager->FindOrBuildMaterial("G4_Galactic");
0059   G4Material* defaultMaterial = nistManager->FindOrBuildMaterial("G4_CONCRETE");
0060
0061   G4VSolid* solidWorld = new G4Box("World", 10 * m, 10 * m, 10 * m);
0062
0063   G4LogicalVolume* logicWorld = new G4LogicalVolume(solidWorld,  // its solid
0064                                                     worldMaterial,  // its material
0065                                                     "World");  // its name
0066
0067   G4PVPlacement* physiWorld = new G4PVPlacement(0,  // no rotation
0068                                                 G4ThreeVector(),  // at (0,0,0)
0069                                                 logicWorld,  // its logical volume
0070                                                 "World",  // its name
0071                                                 0,  // its mother volume
0072                                                 false,  // no boolean operation
0073                                                 0);  // copy number
0074
0075   // -----------------------------------
0076   // -- volume where biasing is applied:
0077   // -----------------------------------
0078   G4double halfXY = 5.0 * m;
0079   G4double halfZ = 1.0 * m;
0080   G4VSolid* solidShield = new G4Box("shield.solid", halfXY, halfXY, halfZ);
0081
0082   G4LogicalVolume* logicShield = new G4LogicalVolume(solidShield,  // its solid
0083                                                      defaultMaterial,  // its material
0084                                                      "shield.logical");  // its name
0085
0086   new G4PVPlacement(0,  // no rotation
0087                     G4ThreeVector(0, 0, halfZ),  // volume entrance at (0,0,0)
0088                     logicShield,  // its logical volume
0089                     "shield.phys",  // its name
0090                     logicWorld,  // its mother  volume
0091                     false,  // no boolean operation
0092                     0);  // copy number
0093
0094   // --------------------------------------------------------------------
0095   // -- dummy volume to print information on particle exiting the shield:
0096   // --------------------------------------------------------------------
0097   G4double halfz = 1 * cm;
0098   G4VSolid* solidMeasurement = new G4Box("meas.solid", halfXY, halfXY, halfz);
0099
0100   G4LogicalVolume* logicMeasurement = new G4LogicalVolume(solidMeasurement,  // its solid
0101                                                           worldMaterial,  // its material
0102                                                           "meas.logical");  // its name
0103
0104   new G4PVPlacement(0,  // no rotation
0105                     G4ThreeVector(0, 0, 2 * halfZ + halfz),  // volume entrance at (0,0,0)
0106                     logicMeasurement,  // its logical volume
0107                     "meas.phys",  // its name
0108                     logicWorld,  // its mother  volume
0109                     false,  // no boolean operation
0110                     0);  // copy number
0111
0112   return physiWorld;
0113 }
0114
0115 void GB05DetectorConstruction::ConstructSDandField()
0116 {
0117   // -- Fetch volume for biasing:
0118   G4LogicalVolume* logicShield = G4LogicalVolumeStore::GetInstance()->GetVolume("shield.logical");
0119
0120   // -------------------------------------------------------------
0121   // -- operator creation, configuration and attachment to volume:
0122   // -------------------------------------------------------------
0123   GB05BOptrSplitAndKillByCrossSection* biasingOperator =
0124     new GB05BOptrSplitAndKillByCrossSection("neutron");
0125   // -- Now, we declare to our biasing operator all the processes we
0126   // -- their disapperance effect on neutrons to be counterbalanced
0127   // -- by the splitting by cross-section :
0128   biasingOperator->AddProcessToEquipoise("Decay");
0129   biasingOperator->AddProcessToEquipoise("nCapture");
0130   biasingOperator->AddProcessToEquipoise("neutronInelastic");
0131
0132   biasingOperator->AttachTo(logicShield);
0133
0134   G4cout << " Attaching biasing operator " << biasingOperator->GetName() << " to logical volume "
0135          << biasingOperator->GetName() << G4endl;
0136
0137   // ------------------------------------------------------------------------------------
0138   // -- Attach a sensitive detector to print information on particles exiting the shield:
0139   // ------------------------------------------------------------------------------------
0140   // -- create and register sensitive detector code module:
0141   G4SDManager* SDman = G4SDManager::GetSDMpointer();
0142   G4VSensitiveDetector* sd = new GB05SD("Scorer");
0143   SDman->AddNewDetector(sd);
0144   // -- Fetch volume for sensitivity and attach sensitive module to it:
0145   G4LogicalVolume* logicSD = G4LogicalVolumeStore::GetInstance()->GetVolume("meas.logical");
0146   logicSD->SetSensitiveDetector(sd);
0147 }