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26 //
27 /// \file B2bDetectorConstruction.cc
28 /// \brief Implementation of the B2bDetectorCo
29
30 #include "B2bDetectorConstruction.hh"
31
32 #include "B2TrackerSD.hh"
33 #include "B2bChamberParameterisation.hh"
34 #include "B2bDetectorMessenger.hh"
35
36 #include "G4Box.hh"
37 #include "G4Colour.hh"
38 #include "G4GeometryManager.hh"
39 #include "G4GeometryTolerance.hh"
40 #include "G4GlobalMagFieldMessenger.hh"
41 #include "G4LogicalVolume.hh"
42 #include "G4Material.hh"
43 #include "G4NistManager.hh"
44 #include "G4PVParameterised.hh"
45 #include "G4PVPlacement.hh"
46 #include "G4SDManager.hh"
47 #include "G4SystemOfUnits.hh"
48 #include "G4Tubs.hh"
49 #include "G4UserLimits.hh"
50 #include "G4VisAttributes.hh"
51
52 // #include "G4ios.hh"
53
54 //....oooOO0OOooo........oooOO0OOooo........oo
55
56 G4ThreadLocal G4GlobalMagFieldMessenger* B2bDe
57
58 B2bDetectorConstruction::B2bDetectorConstructi
59 : G4VUserDetectorConstruction(),
60 fLogicTarget(NULL),
61 fLogicChamber(NULL),
62 fTargetMaterial(NULL),
63 fChamberMaterial(NULL),
64 fStepLimit(NULL),
65 fCheckOverlaps(true)
66 {
67 fMessenger = new B2bDetectorMessenger(this);
68 }
69
70 //....oooOO0OOooo........oooOO0OOooo........oo
71
72 B2bDetectorConstruction::~B2bDetectorConstruct
73 {
74 delete fStepLimit;
75 delete fMessenger;
76 delete fMagFieldMessenger;
77 fMagFieldMessenger = 0;
78 }
79
80 //....oooOO0OOooo........oooOO0OOooo........oo
81
82 G4VPhysicalVolume* B2bDetectorConstruction::Co
83 {
84 // Define materials
85 DefineMaterials();
86
87 // Define volumes
88 return DefineVolumes();
89 }
90
91 //....oooOO0OOooo........oooOO0OOooo........oo
92
93 void B2bDetectorConstruction::DefineMaterials(
94 {
95 // Material definition
96
97 G4NistManager* nistManager = G4NistManager::
98
99 // Air defined using NIST Manager
100 nistManager->FindOrBuildMaterial("G4_AIR");
101
102 // Lead defined using NIST Manager
103 fTargetMaterial = nistManager->FindOrBuildMa
104
105 // Xenon gas defined using NIST Manager
106 fChamberMaterial = nistManager->FindOrBuildM
107
108 // Print materials
109 G4cout << *(G4Material::GetMaterialTable())
110 }
111
112 //....oooOO0OOooo........oooOO0OOooo........oo
113
114 G4VPhysicalVolume* B2bDetectorConstruction::De
115 {
116 G4Material* air = G4Material::GetMaterial("G
117
118 // Sizes of the principal geometrical compon
119
120 G4int NbOfChambers = 5;
121 G4double chamberSpacing = 80 * cm; // from
122
123 G4double chamberWidth = 20.0 * cm; // width
124 G4double targetLength = 5.0 * cm; // full l
125
126 G4double trackerLength = (NbOfChambers + 1)
127
128 G4double worldLength = 1.2 * (2 * targetLeng
129
130 G4double targetRadius = 0.5 * targetLength;
131 targetLength = 0.5 * targetLength; // Half
132 G4double trackerSize = 0.5 * trackerLength;
133
134 // Definitions of Solids, Logical Volumes, P
135
136 // World
137
138 G4GeometryManager::GetInstance()->SetWorldMa
139
140 G4cout << "Computed tolerance = "
141 << G4GeometryTolerance::GetInstance()
142
143 G4Box* worldS = new G4Box("world", // its n
144 worldLength / 2, w
145 G4LogicalVolume* worldLV = new G4LogicalVolu
146
147
148
149 // Must place the World Physical volume unr
150 //
151 G4VPhysicalVolume* worldPV = new G4PVPlaceme
152
153
154
155
156
157
158
159
160 // Target
161
162 G4ThreeVector positionTarget = G4ThreeVector
163
164 G4Tubs* targetS = new G4Tubs("target", 0., t
165 fLogicTarget = new G4LogicalVolume(targetS,
166 new G4PVPlacement(0, // no rotation
167 positionTarget, // at (x,
168 fLogicTarget, // its logi
169 "Target", // its name
170 worldLV, // its mother vo
171 false, // no boolean oper
172 0, // copy number
173 fCheckOverlaps); // check
174
175 G4cout << "Target is " << 2 * targetLength /
176 << G4endl;
177
178 // Tracker
179
180 G4ThreeVector positionTracker = G4ThreeVecto
181
182 G4Tubs* trackerS = new G4Tubs("tracker", 0,
183 G4LogicalVolume* trackerLV = new G4LogicalVo
184 new G4PVPlacement(0, // no rotation
185 positionTracker, // at (x
186 trackerLV, // its logical
187 "Tracker", // its name
188 worldLV, // its mother v
189 false, // no boolean oper
190 0, // copy number
191 fCheckOverlaps); // check
192
193 // Tracker segments
194
195 // An example of Parameterised volumes
196 // Dummy values for G4Tubs -- modified by pa
197
198 G4Tubs* chamberS = new G4Tubs("tracker", 0,
199 fLogicChamber = new G4LogicalVolume(chamberS
200
201 G4double firstPosition = -trackerSize + cham
202 G4double firstLength = trackerLength / 10;
203 G4double lastLength = trackerLength;
204
205 G4VPVParameterisation* chamberParam =
206 new B2bChamberParameterisation(NbOfChamber
207 firstPositi
208 chamberSpac
209 chamberWidt
210 firstLength
211 lastLength)
212
213 // dummy value : kZAxis -- modified by param
214
215 new G4PVParameterised("Chamber", // their n
216 fLogicChamber, // the
217 trackerLV, // Mother
218 kZAxis, // Are placed
219 NbOfChambers, // Numb
220 chamberParam, // The
221 fCheckOverlaps); // c
222
223 G4cout << "There are " << NbOfChambers << "
224 << "\nThe chambers are " << chamberWi
225 << "\nThe distance between chamber is
226
227 // Visualization attributes
228
229 G4VisAttributes* boxVisAtt = new G4VisAttrib
230 worldLV->SetVisAttributes(boxVisAtt);
231 fLogicTarget->SetVisAttributes(boxVisAtt);
232 trackerLV->SetVisAttributes(boxVisAtt);
233
234 G4VisAttributes* chamberVisAtt = new G4VisAt
235 fLogicChamber->SetVisAttributes(chamberVisAt
236
237 // Example of User Limits
238 //
239 // Below is an example of how to set trackin
240 // logical volume
241 //
242 // Sets a max step length in the tracker reg
243
244 G4double maxStep = 0.5 * chamberWidth;
245 fStepLimit = new G4UserLimits(maxStep);
246 trackerLV->SetUserLimits(fStepLimit);
247
248 /// Set additional contraints on the track,
249 ///
250 /// G4double maxLength = 2*trackerLength, ma
251 /// trackerLV->SetUserLimits(new G4UserLimit
252 ///
253 ///
254 ///
255
256 // Always return the physical world
257
258 return worldPV;
259 }
260
261 //....oooOO0OOooo........oooOO0OOooo........oo
262
263 void B2bDetectorConstruction::ConstructSDandFi
264 {
265 // Sensitive detectors
266
267 G4String trackerChamberSDname = "B2/TrackerC
268 B2TrackerSD* aTrackerSD = new B2TrackerSD(tr
269 G4SDManager::GetSDMpointer()->AddNewDetector
270 SetSensitiveDetector(fLogicChamber, aTracker
271
272 // Create global magnetic field messenger.
273 // Uniform magnetic field is then created au
274 // the field value is not zero.
275 G4ThreeVector fieldValue = G4ThreeVector();
276 fMagFieldMessenger = new G4GlobalMagFieldMes
277 fMagFieldMessenger->SetVerboseLevel(1);
278 }
279
280 //....oooOO0OOooo........oooOO0OOooo........oo
281
282 void B2bDetectorConstruction::SetTargetMateria
283 {
284 G4NistManager* nistManager = G4NistManager::
285
286 G4Material* pttoMaterial = nistManager->Find
287
288 if (fTargetMaterial != pttoMaterial) {
289 if (pttoMaterial) {
290 fTargetMaterial = pttoMaterial;
291 if (fLogicTarget) fLogicTarget->SetMater
292 G4cout << "\n----> The target is made of
293 }
294 else {
295 G4cout << "\n--> WARNING from SetTarget
296 << G4endl;
297 }
298 }
299 }
300
301 //....oooOO0OOooo........oooOO0OOooo........oo
302
303 void B2bDetectorConstruction::SetChamberMateri
304 {
305 G4NistManager* nistManager = G4NistManager::
306
307 G4Material* pttoMaterial = nistManager->Find
308
309 if (fChamberMaterial != pttoMaterial) {
310 if (pttoMaterial) {
311 fChamberMaterial = pttoMaterial;
312 if (fLogicChamber) fLogicChamber->SetMat
313 G4cout << "\n----> The chambers are made
314 }
315 else {
316 G4cout << "\n--> WARNING from SetChambe
317 << G4endl;
318 }
319 }
320 }
321
322 //....oooOO0OOooo........oooOO0OOooo........oo
323
324 void B2bDetectorConstruction::SetMaxStep(G4dou
325 {
326 if ((fStepLimit) && (maxStep > 0.)) fStepLim
327 }
328
329 //....oooOO0OOooo........oooOO0OOooo........oo
330