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25 //
26 //
27 /// \file field/field06/src/F06DetectorConstruction.cc
28 /// \brief Implementation of the F06DetectorConstruction class
29 //
30
31 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
32 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
33
34 #include "F06DetectorConstruction.hh"
35
36 #include "G4Box.hh"
37 #include "G4Colour.hh"
38 #include "G4FieldManager.hh"
39 #include "G4GeometryManager.hh"
40 #include "G4LogicalVolume.hh"
41 #include "G4LogicalVolumeStore.hh"
42 #include "G4Material.hh"
43 #include "G4NistManager.hh"
44 #include "G4PVPlacement.hh"
45 #include "G4PhysicalVolumeStore.hh"
46 #include "G4RepleteEofM.hh"
47 #include "G4SolidStore.hh"
48 #include "G4SystemOfUnits.hh"
49 #include "G4TransportationManager.hh"
50 #include "G4UniformGravityField.hh"
51 #include "G4UserLimits.hh"
52 #include "G4VisAttributes.hh"
53 // #include "G4EqGravityField.hh"
54
55 #include "G4ChordFinder.hh"
56 #include "G4ClassicalRK4.hh"
57 #include "G4IntegrationDriver.hh"
58 #include "G4MagIntegratorStepper.hh"
59 #include "G4PropagatorInField.hh"
60
61 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
62
63 F06DetectorConstruction::F06DetectorConstruction() : fVacuum(nullptr)
64 {
65 // materials
66 DefineMaterials();
67 }
68
69 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
70
71 F06DetectorConstruction::~F06DetectorConstruction()
72 {
73 delete fField;
74 }
75
76 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
77
78 void F06DetectorConstruction::DefineMaterials()
79 {
80 G4NistManager* nistMan = G4NistManager::Instance();
81
82 fVacuum = nistMan->FindOrBuildMaterial("G4_Galactic");
83
84 G4cout << *(G4Material::GetMaterialTable()) << G4endl;
85 }
86
87 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
88
89 G4VPhysicalVolume* F06DetectorConstruction::Construct()
90 {
91 //
92 // World
93 //
94
95 G4double expHall_x = 1.0 * m;
96 G4double expHall_y = 1.0 * m;
97 G4double expHall_z = 1.0 * m;
98
99 auto solidWorld = new G4Box("World", // its name
100 expHall_x, expHall_y, expHall_z); // its size
101
102 auto logicWorld = new G4LogicalVolume(solidWorld, // its solid
103 fVacuum, // its material
104 "World"); // its name
105
106 auto physiWorld = new G4PVPlacement(nullptr, // no rotation
107 G4ThreeVector(), // at (0,0,0)
108 logicWorld, // its logical volume
109 "World", // its name
110 nullptr, // its mother volume
111 false, // no boolean operation
112 0); // copy number
113
114 G4double maxStep = 1.0 * mm;
115 G4double maxTime = 41. * s;
116
117 auto stepLimit = new G4UserLimits(maxStep, DBL_MAX, maxTime);
118
119 logicWorld->SetUserLimits(stepLimit);
120
121 //
122 // Visualization attributes
123 //
124 // logicWorld->SetVisAttributes (G4VisAttributes::GetInvisible());
125
126 //
127 // always return the physical World
128 //
129 return physiWorld;
130 }
131
132 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
133
134 G4ThreadLocal G4UniformGravityField* F06DetectorConstruction::fField = nullptr;
135
136 void F06DetectorConstruction::ConstructSDandField()
137 {
138 using StepperType = G4ClassicalRK4;
139
140 if (!fField) {
141 fField = new G4UniformGravityField();
142
143 auto equation = new G4RepleteEofM(fField);
144 // G4EqGravityField* equation = new G4EqGravityField(fField);
145
146 G4TransportationManager* transportMgr = G4TransportationManager::GetTransportationManager();
147
148 G4FieldManager* fieldManager = transportMgr->GetFieldManager();
149 fieldManager->SetDetectorField(fField);
150
151 const int nVar = 8; // 12 for RepleteEofM
152 auto stepper = new StepperType(equation, nVar);
153
154 G4double minStep = 0.01 * mm;
155 G4ChordFinder* chordFinder = nullptr;
156 if (stepper) {
157 auto intgrDriver =
158 new G4IntegrationDriver<StepperType>(minStep, stepper, stepper->GetNumberOfVariables());
159 if (intgrDriver) {
160 chordFinder = new G4ChordFinder(intgrDriver);
161 }
162 }
163
164 // OLD -- and wrong
165 // new G4ChordFinder((G4MagneticField*)fField,minStep,stepper);
166
167 // Set accuracy parameters
168 G4double deltaChord = 3.0 * mm;
169 chordFinder->SetDeltaChord(deltaChord);
170
171 G4double deltaIntersection = 0.1 * mm;
172 fieldManager->SetDeltaIntersection(deltaIntersection);
173
174 // Control accuracy of integration
175 //
176 G4double deltaOneStep = 0.01 * mm;
177 fieldManager->SetAccuraciesWithDeltaOneStep(deltaOneStep);
178 //
179 G4double epsMax = 1.0e-4; // Pure number -- maximum relative integration error
180 G4double epsMin = 2.5e-7; //
181 fieldManager->SetMinimumEpsilonStep(epsMin);
182 fieldManager->SetMaximumEpsilonStep(epsMax);
183 // The acceptable relative accuracy is calculated as deltaOneStep / stepsize
184 // but bounded to the interval between these values!
185
186 fieldManager->SetChordFinder(chordFinder);
187 }
188 }
189
190 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
191