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25 //
26 //
27 /// \file GB05DetectorConstruction.cc
28 /// \brief Implementation of the GB05DetectorConstruction class
29
30 #include "GB05DetectorConstruction.hh"
31
32 #include "GB05BOptrSplitAndKillByCrossSection.hh"
33 #include "GB05SD.hh"
34
35 #include "G4Box.hh"
36 #include "G4LogicalVolume.hh"
37 #include "G4LogicalVolumeStore.hh"
38 #include "G4Material.hh"
39 #include "G4NistManager.hh"
40 #include "G4PVPlacement.hh"
41 #include "G4SDManager.hh"
42 #include "G4SystemOfUnits.hh"
43
44 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
45
46 GB05DetectorConstruction::GB05DetectorConstruction() : G4VUserDetectorConstruction() {}
47
48 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
49
50 GB05DetectorConstruction::~GB05DetectorConstruction() {}
51
52 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
53
54 G4VPhysicalVolume* GB05DetectorConstruction::Construct()
55 {
56 // -- Collect a few materials from NIST database:
57 auto nistManager = G4NistManager::Instance();
58 G4Material* worldMaterial = nistManager->FindOrBuildMaterial("G4_Galactic");
59 G4Material* defaultMaterial = nistManager->FindOrBuildMaterial("G4_CONCRETE");
60
61 G4VSolid* solidWorld = new G4Box("World", 10 * m, 10 * m, 10 * m);
62
63 G4LogicalVolume* logicWorld = new G4LogicalVolume(solidWorld, // its solid
64 worldMaterial, // its material
65 "World"); // its name
66
67 G4PVPlacement* physiWorld = new G4PVPlacement(0, // no rotation
68 G4ThreeVector(), // at (0,0,0)
69 logicWorld, // its logical volume
70 "World", // its name
71 0, // its mother volume
72 false, // no boolean operation
73 0); // copy number
74
75 // -----------------------------------
76 // -- volume where biasing is applied:
77 // -----------------------------------
78 G4double halfXY = 5.0 * m;
79 G4double halfZ = 1.0 * m;
80 G4VSolid* solidShield = new G4Box("shield.solid", halfXY, halfXY, halfZ);
81
82 G4LogicalVolume* logicShield = new G4LogicalVolume(solidShield, // its solid
83 defaultMaterial, // its material
84 "shield.logical"); // its name
85
86 new G4PVPlacement(0, // no rotation
87 G4ThreeVector(0, 0, halfZ), // volume entrance at (0,0,0)
88 logicShield, // its logical volume
89 "shield.phys", // its name
90 logicWorld, // its mother volume
91 false, // no boolean operation
92 0); // copy number
93
94 // --------------------------------------------------------------------
95 // -- dummy volume to print information on particle exiting the shield:
96 // --------------------------------------------------------------------
97 G4double halfz = 1 * cm;
98 G4VSolid* solidMeasurement = new G4Box("meas.solid", halfXY, halfXY, halfz);
99
100 G4LogicalVolume* logicMeasurement = new G4LogicalVolume(solidMeasurement, // its solid
101 worldMaterial, // its material
102 "meas.logical"); // its name
103
104 new G4PVPlacement(0, // no rotation
105 G4ThreeVector(0, 0, 2 * halfZ + halfz), // volume entrance at (0,0,0)
106 logicMeasurement, // its logical volume
107 "meas.phys", // its name
108 logicWorld, // its mother volume
109 false, // no boolean operation
110 0); // copy number
111
112 return physiWorld;
113 }
114
115 void GB05DetectorConstruction::ConstructSDandField()
116 {
117 // -- Fetch volume for biasing:
118 G4LogicalVolume* logicShield = G4LogicalVolumeStore::GetInstance()->GetVolume("shield.logical");
119
120 // -------------------------------------------------------------
121 // -- operator creation, configuration and attachment to volume:
122 // -------------------------------------------------------------
123 GB05BOptrSplitAndKillByCrossSection* biasingOperator =
124 new GB05BOptrSplitAndKillByCrossSection("neutron");
125 // -- Now, we declare to our biasing operator all the processes we
126 // -- their disapperance effect on neutrons to be counterbalanced
127 // -- by the splitting by cross-section :
128 biasingOperator->AddProcessToEquipoise("Decay");
129 biasingOperator->AddProcessToEquipoise("nCapture");
130 biasingOperator->AddProcessToEquipoise("neutronInelastic");
131
132 biasingOperator->AttachTo(logicShield);
133
134 G4cout << " Attaching biasing operator " << biasingOperator->GetName() << " to logical volume "
135 << biasingOperator->GetName() << G4endl;
136
137 // ------------------------------------------------------------------------------------
138 // -- Attach a sensitive detector to print information on particles exiting the shield:
139 // ------------------------------------------------------------------------------------
140 // -- create and register sensitive detector code module:
141 G4SDManager* SDman = G4SDManager::GetSDMpointer();
142 G4VSensitiveDetector* sd = new GB05SD("Scorer");
143 SDman->AddNewDetector(sd);
144 // -- Fetch volume for sensitivity and attach sensitive module to it:
145 G4LogicalVolume* logicSD = G4LogicalVolumeStore::GetInstance()->GetVolume("meas.logical");
146 logicSD->SetSensitiveDetector(sd);
147 }
148