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25 //
26 /// \file DetectorConstruction.cc
27 /// \brief Implementation of the DetectorConst
28 //
29 //....oooOO0OOooo........oooOO0OOooo........oo
30
31 #include "DetectorConstruction.hh"
32
33 #include "G4RunManager.hh"
34 #include "G4NistManager.hh"
35 #include "G4Box.hh"
36 #include "G4LogicalVolume.hh"
37 #include "G4RegionStore.hh"
38 #include "G4VisAttributes.hh"
39 #include "PrimaryGeneratorAction.hh"
40 #include <CLHEP/Units/SystemOfUnits.h>
41
42 //....oooOO0OOooo........oooOO0OOooo........oo
43
44 G4VPhysicalVolume* DetectorConstruction::Const
45 {
46 //Check overlap option
47 G4bool checkOverlaps = true;
48
49 //Materials
50 G4NistManager* nist = G4NistManager::Insta
51 G4Material* world_mat = nist->FindOrBuildM
52 G4Material* silicon = nist->FindOrBuildMat
53
54 //World
55 G4Box* solidWorld = new G4Box("World", 0.2
56 G4LogicalVolume* logicWorld = new G4Logica
57 G4VPhysicalVolume* physWorld = new G4PVPla
58 (0,
59 G4ThreeVec
60 logicWorld
61 "World",
62 0,
63 false,
64 0,
65 checkOverl
66 logicWorld->SetVisAttributes(G4VisAttribut
67
68
69 // --------------- Crystal ---------------
70
71 //Select crystal material
72 fCrystalMaterial = nist->FindOrBuildMateri
73
74 //Setting crystal rotation angle (also the
75 //Crystal rotation angle (also the angle o
76 G4double angleX = 0.*1e-6; //rad
77 G4RotationMatrix* crystalRotationMatrix =
78 crystalRotationMatrix->rotateY(-angleX);
79
80 //setting crystal dimensions
81 /*at high energies the electromagnetic sho
82 oriented tungsten should behave similarl
83 e.m. shower in several times thicker amo
84 (several times reduction of the effectiv
85 G4ThreeVector crystalSize = G4ThreeVector(
86
87
88
89 //Setting crystal position
90 G4ThreeVector posCrystal = G4ThreeVector(0
91
92 //crystal volume
93 G4Box* solidCrystal = new G4Box("Crystal",
94 crystalSiz
95 crystalSiz
96 crystalSiz
97
98 fLogicCrystal = new G4LogicalVolume(solidC
99 fCrysta
100 "Crysta
101 new G4PVPlacement(crystalRotationMatrix,
102 posCrystal,
103 fLogicCrystal,
104 "Crystal",
105 logicWorld,
106 false,
107 0,
108 checkOverlaps);
109
110 //crystal region (necessary for the FastSi
111 G4Region* regionCh = new G4Region("Crystal
112 regionCh->AddRootLogicalVolume(fLogicCryst
113
114 //visualization attributes
115 G4VisAttributes* crystalVisAttribute =
116 new G4VisAttributes(G4Colour(1., 0., 0
117 crystalVisAttribute->SetForceSolid(true);
118 fLogicCrystal->SetVisAttributes(crystalVis
119
120 //print crystal info
121 G4cout << "Crystal size: " << crystalSize.
122 << " " << crystalSize.y()/CLHEP::mm
123 << " " << crystalSize.z()/CLHEP::mm
124 G4cout << "Crystal angleX: " << angleX <<
125
126 // --------------- Detector --------------
127 //Setting detector position
128 G4ThreeVector posDetector = G4ThreeVector(
129
130 //particle detector volume
131 G4Box* detector = new G4Box("Detector",
132 10*CLHEP::cm/2
133 10*CLHEP::cm/2
134 0.3*CLHEP::mm/
135
136 G4LogicalVolume* logicDetector = new G4Log
137
138
139 new G4PVPlacement(0,
140 posDetector,
141 logicDetector,
142 "Detector",
143 logicWorld,
144 false,
145 0,
146 checkOverlaps);
147
148 //visualization attributes
149 G4VisAttributes* detectorVisAttribute =
150 new G4VisAttributes(G4Colour(0., 0., 1
151 detectorVisAttribute->SetForceSolid(true);
152 logicDetector->SetVisAttributes(detectorVi
153
154 //always return the physical World
155 return physWorld;
156 }
157
158 //....oooOO0OOooo........oooOO0OOooo........oo
159
160 void DetectorConstruction::ConstructSDandField
161 {
162 // --------------- fast simulation -------
163 //extract the region of the crystal from t
164 G4RegionStore* regionStore = G4RegionStore
165 G4Region* regionCh = regionStore->GetRegio
166
167 //create the channeling model for this reg
168 G4ChannelingFastSimModel* channelingModel
169 new G4ChannelingFastSimModel("Channeli
170
171 //Crystal planes or axes considered
172 //Use brackets (...) for planes and <...>
173 G4String lattice = "<111>";
174
175 //activate the channeling model
176 channelingModel->Input(fCrystalMaterial, l
177
178 /*
179 activate radiation model (do it only when
180 radiation production in an oriented crysta
181 */
182 G4bool activateRadiationModel = true;
183 if (activateRadiationModel)
184 {
185 channelingModel->RadiationModelActivat
186 G4cout << "Radiation model activated"
187 }
188 }
189
190 //....oooOO0OOooo........oooOO0OOooo........oo
191
192