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25 //
26 /// \file DetectorConstruction.cc
27 /// \brief Implementation of the DetectorConstruction class
28 //
29 //
30
31 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
32 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
33
34 #include "DetectorConstruction.hh"
35
36 #include "BiasingOperator.hh"
37
38 #include "G4Box.hh"
39 #include "G4Element.hh"
40 #include "G4ElementTable.hh"
41 #include "G4LogicalVolume.hh"
42 #include "G4Material.hh"
43 #include "G4MaterialTable.hh"
44 #include "G4NistManager.hh"
45 #include "G4PVPlacement.hh"
46 #include "G4ProductionCuts.hh"
47 #include "G4Region.hh"
48 #include "G4RegionStore.hh"
49 #include "G4SDManager.hh"
50 #include "G4SystemOfUnits.hh"
51 #include "G4ThreeVector.hh"
52 #include "G4Tubs.hh"
53
54 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
55
56 DetectorConstruction::DetectorConstruction()
57 : G4VUserDetectorConstruction(),
58 fSiliconTrackerLogical(nullptr),
59 fEmCaloLogical(nullptr),
60 fHadCaloLogical(nullptr)
61 {}
62
63 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
64
65 DetectorConstruction::~DetectorConstruction() {}
66
67 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
68
69 G4VPhysicalVolume* DetectorConstruction::Construct()
70 {
71 G4cout << "\nDetectorConstruction....\n" << G4endl;
72
73 //--------- Material definition ---------
74 G4NistManager* nistManager = G4NistManager::Instance();
75 G4Material* air = nistManager->FindOrBuildMaterial("G4_AIR");
76 G4Material* csi = nistManager->FindOrBuildMaterial("G4_CESIUM_IODIDE");
77 G4Material* silicon = nistManager->FindOrBuildMaterial("G4_Si");
78 G4Material* iron = nistManager->FindOrBuildMaterial("G4_Fe");
79
80 // World
81 G4Box* worldBox = new G4Box("WorldBox", 200.0 * cm, 200.0 * cm, 200.0 * cm);
82 G4LogicalVolume* worldLogical = new G4LogicalVolume(worldBox, air, "WorldLogical", 0, 0, 0);
83 G4PVPlacement* worldPhys =
84 new G4PVPlacement(0, G4ThreeVector(), "WorldPhysical", worldLogical, 0, false, 0);
85
86 // Silicon Tracker: for simplicity and to have more hadronic interactions,
87 // it is single layer of silicon (20 cm thick)
88 G4double halfDetectorXYsize = 100.0 * cm;
89 G4Box* siliconBox = new G4Box("siliconBox", halfDetectorXYsize, halfDetectorXYsize, 10.0 * cm);
90 fSiliconTrackerLogical =
91 new G4LogicalVolume(siliconBox, silicon, "SiliconTrackerLogical", 0, 0, 0);
92 new G4PVPlacement(0, G4ThreeVector(0.0, 0.0, 0.0), "SiliconTrackerPhysical",
93 fSiliconTrackerLogical, worldPhys, false, 0);
94
95 // Electromagnetic (EM) calorimeter: an homogeneous crystal (40 cm thick)
96 G4Box* emCaloBox = new G4Box("EmCaloBox", halfDetectorXYsize, halfDetectorXYsize, 20.0 * cm);
97 fEmCaloLogical = new G4LogicalVolume(emCaloBox, csi, "EmCalorimeterLogical", 0, 0, 0);
98 new G4PVPlacement(0, G4ThreeVector(0.0, 0.0, 35.0 * cm), "EmCalorimeterPhysical", fEmCaloLogical,
99 worldPhys, false, 0);
100
101 // The hadronic (HAD) calorimeter: an homogeneous block of metal (100 cm thick)
102 G4Box* hadCaloBox = new G4Box("HadCaloBox", halfDetectorXYsize, halfDetectorXYsize, 50.0 * cm);
103 fHadCaloLogical = new G4LogicalVolume(hadCaloBox, iron, "HadCaloLogical", 0, 0, 0);
104 new G4PVPlacement(0, G4ThreeVector(0.0, 0.0, 110.0 * cm), "HadCaloPhysical", fHadCaloLogical,
105 worldPhys, false, 0);
106
107 // Define the tracker region
108 G4Region* trackerRegion = new G4Region("Tracker_region");
109 trackerRegion->AddRootLogicalVolume(fSiliconTrackerLogical);
110 std::vector<double> cuts;
111 cuts.push_back(10.0 * cm);
112 cuts.push_back(10.0 * cm);
113 cuts.push_back(10.0 * cm);
114 cuts.push_back(10.0 * cm);
115 trackerRegion->SetProductionCuts(new G4ProductionCuts);
116 trackerRegion->GetProductionCuts()->SetProductionCuts(cuts);
117
118 // Define the EM calorimeter region
119 G4Region* emCaloRegion = new G4Region("EM_calo_region");
120 emCaloRegion->AddRootLogicalVolume(fEmCaloLogical);
121 cuts.clear();
122 cuts.push_back(20.0 * cm);
123 cuts.push_back(20.0 * cm);
124 cuts.push_back(20.0 * cm);
125 cuts.push_back(20.0 * cm);
126 emCaloRegion->SetProductionCuts(new G4ProductionCuts);
127 emCaloRegion->GetProductionCuts()->SetProductionCuts(cuts);
128
129 // Define the HAD calorimeter region
130 G4Region* hadCaloRegion = new G4Region("HAD_calo_region");
131 hadCaloRegion->AddRootLogicalVolume(fHadCaloLogical);
132 cuts.clear();
133 cuts.push_back(50.0 * cm);
134 cuts.push_back(50.0 * cm);
135 cuts.push_back(50.0 * cm);
136 cuts.push_back(50.0 * cm);
137 hadCaloRegion->SetProductionCuts(new G4ProductionCuts);
138 hadCaloRegion->GetProductionCuts()->SetProductionCuts(cuts);
139
140 return worldPhys;
141 }
142
143 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
144
145 void DetectorConstruction::ConstructSDandField()
146 {
147 // Instanciate the biasing operator and specify the particles of interest (i.e. p, n, pi+, pi-)
148 // and the logical volume(s) where this operator should be applied.
149 BiasingOperator* biasingOperator = new BiasingOperator;
150 biasingOperator->AddParticle("proton");
151 biasingOperator->AddParticle("neutron");
152 biasingOperator->AddParticle("pi+");
153 biasingOperator->AddParticle("pi-");
154 biasingOperator->AttachTo(fSiliconTrackerLogical);
155 }
156
157 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
158