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25 // 25 //
>> 26 // $Id$
26 // 27 //
27 /// \file B2bDetectorConstruction.cc 28 /// \file B2bDetectorConstruction.cc
28 /// \brief Implementation of the B2bDetectorCo 29 /// \brief Implementation of the B2bDetectorConstruction class
29 << 30
30 #include "B2bDetectorConstruction.hh" 31 #include "B2bDetectorConstruction.hh"
31 <<
32 #include "B2TrackerSD.hh" <<
33 #include "B2bChamberParameterisation.hh" <<
34 #include "B2bDetectorMessenger.hh" 32 #include "B2bDetectorMessenger.hh"
>> 33 #include "B2bChamberParameterisation.hh"
>> 34 #include "B2TrackerSD.hh"
35 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" 36 #include "G4Material.hh"
43 #include "G4NistManager.hh" 37 #include "G4NistManager.hh"
44 #include "G4PVParameterised.hh" << 38
45 #include "G4PVPlacement.hh" << 39 #include "G4Box.hh"
46 #include "G4SDManager.hh" <<
47 #include "G4SystemOfUnits.hh" <<
48 #include "G4Tubs.hh" 40 #include "G4Tubs.hh"
>> 41 #include "G4LogicalVolume.hh"
>> 42 #include "G4PVPlacement.hh"
>> 43 #include "G4PVParameterised.hh"
>> 44 #include "G4GlobalMagFieldMessenger.hh"
>> 45
>> 46 #include "G4GeometryTolerance.hh"
>> 47 #include "G4GeometryManager.hh"
>> 48
49 #include "G4UserLimits.hh" 49 #include "G4UserLimits.hh"
>> 50
50 #include "G4VisAttributes.hh" 51 #include "G4VisAttributes.hh"
>> 52 #include "G4Colour.hh"
>> 53
>> 54 #include "G4SystemOfUnits.hh"
51 55
52 // #include "G4ios.hh" << 56 //#include "G4ios.hh"
53 57
54 //....oooOO0OOooo........oooOO0OOooo........oo 58 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
55 59
56 G4ThreadLocal G4GlobalMagFieldMessenger* B2bDe << 60 G4ThreadLocal
57 << 61 G4GlobalMagFieldMessenger* B2bDetectorConstruction::fMagFieldMessenger = 0;
>> 62
58 B2bDetectorConstruction::B2bDetectorConstructi 63 B2bDetectorConstruction::B2bDetectorConstruction()
59 : G4VUserDetectorConstruction(), << 64 :G4VUserDetectorConstruction(),
60 fLogicTarget(NULL), << 65 fLogicTarget(NULL), fLogicChamber(NULL),
61 fLogicChamber(NULL), << 66 fTargetMaterial(NULL), fChamberMaterial(NULL),
62 fTargetMaterial(NULL), << 67 fStepLimit(NULL),
63 fChamberMaterial(NULL), << 68 fCheckOverlaps(true)
64 fStepLimit(NULL), <<
65 fCheckOverlaps(true) <<
66 { 69 {
67 fMessenger = new B2bDetectorMessenger(this); 70 fMessenger = new B2bDetectorMessenger(this);
68 } 71 }
69 72
70 //....oooOO0OOooo........oooOO0OOooo........oo 73 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
71 << 74
72 B2bDetectorConstruction::~B2bDetectorConstruct 75 B2bDetectorConstruction::~B2bDetectorConstruction()
73 { 76 {
74 delete fStepLimit; 77 delete fStepLimit;
75 delete fMessenger; 78 delete fMessenger;
76 delete fMagFieldMessenger; 79 delete fMagFieldMessenger;
77 fMagFieldMessenger = 0; 80 fMagFieldMessenger = 0;
78 } 81 }
79 82
80 //....oooOO0OOooo........oooOO0OOooo........oo 83 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
81 << 84
82 G4VPhysicalVolume* B2bDetectorConstruction::Co 85 G4VPhysicalVolume* B2bDetectorConstruction::Construct()
83 { 86 {
84 // Define materials 87 // Define materials
85 DefineMaterials(); 88 DefineMaterials();
86 89
87 // Define volumes 90 // Define volumes
88 return DefineVolumes(); 91 return DefineVolumes();
89 } 92 }
90 93
91 //....oooOO0OOooo........oooOO0OOooo........oo 94 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
92 95
93 void B2bDetectorConstruction::DefineMaterials( 96 void B2bDetectorConstruction::DefineMaterials()
94 { 97 {
95 // Material definition << 98 // Material definition
96 99
97 G4NistManager* nistManager = G4NistManager:: 100 G4NistManager* nistManager = G4NistManager::Instance();
98 101
99 // Air defined using NIST Manager 102 // Air defined using NIST Manager
100 nistManager->FindOrBuildMaterial("G4_AIR"); 103 nistManager->FindOrBuildMaterial("G4_AIR");
101 << 104
102 // Lead defined using NIST Manager 105 // Lead defined using NIST Manager
103 fTargetMaterial = nistManager->FindOrBuildMa << 106 fTargetMaterial = nistManager->FindOrBuildMaterial("G4_Pb");
104 107
105 // Xenon gas defined using NIST Manager 108 // Xenon gas defined using NIST Manager
106 fChamberMaterial = nistManager->FindOrBuildM 109 fChamberMaterial = nistManager->FindOrBuildMaterial("G4_Xe");
107 110
108 // Print materials 111 // Print materials
109 G4cout << *(G4Material::GetMaterialTable()) 112 G4cout << *(G4Material::GetMaterialTable()) << G4endl;
110 } 113 }
111 114
112 //....oooOO0OOooo........oooOO0OOooo........oo 115 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
113 116
114 G4VPhysicalVolume* B2bDetectorConstruction::De 117 G4VPhysicalVolume* B2bDetectorConstruction::DefineVolumes()
115 { 118 {
116 G4Material* air = G4Material::GetMaterial("G << 119 G4Material* air = G4Material::GetMaterial("G4_AIR");
117 120
118 // Sizes of the principal geometrical compon 121 // Sizes of the principal geometrical components (solids)
119 << 122
120 G4int NbOfChambers = 5; 123 G4int NbOfChambers = 5;
121 G4double chamberSpacing = 80 * cm; // from << 124 G4double chamberSpacing = 80*cm; // from chamber center to center!
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 <<
129 125
130 G4double targetRadius = 0.5 * targetLength; << 126 G4double chamberWidth = 20.0*cm; // width of the chambers
131 targetLength = 0.5 * targetLength; // Half << 127 G4double targetLength = 5.0*cm; // full length of Target
132 G4double trackerSize = 0.5 * trackerLength; << 128
>> 129 G4double trackerLength = (NbOfChambers+1)*chamberSpacing;
>> 130
>> 131 G4double worldLength = 1.2 * (2*targetLength + trackerLength);
>> 132
>> 133 G4double targetRadius = 0.5*targetLength; // Radius of Target
>> 134 targetLength = 0.5*targetLength; // Half length of the Target
>> 135 G4double trackerSize = 0.5*trackerLength; // Half length of the Tracker
133 136
134 // Definitions of Solids, Logical Volumes, P 137 // Definitions of Solids, Logical Volumes, Physical Volumes
135 138
136 // World 139 // World
137 140
138 G4GeometryManager::GetInstance()->SetWorldMa 141 G4GeometryManager::GetInstance()->SetWorldMaximumExtent(worldLength);
139 142
140 G4cout << "Computed tolerance = " 143 G4cout << "Computed tolerance = "
141 << G4GeometryTolerance::GetInstance() << 144 << G4GeometryTolerance::GetInstance()->GetSurfaceTolerance()/mm
142 << 145 << " mm" << G4endl;
143 G4Box* worldS = new G4Box("world", // its n <<
144 worldLength / 2, w <<
145 G4LogicalVolume* worldLV = new G4LogicalVolu <<
146 <<
147 <<
148 146
>> 147 G4Box* worldS
>> 148 = new G4Box("world", //its name
>> 149 worldLength/2,worldLength/2,worldLength/2); //its size
>> 150 G4LogicalVolume* worldLV
>> 151 = new G4LogicalVolume(
>> 152 worldS, //its solid
>> 153 air, //its material
>> 154 "World"); //its name
>> 155
149 // Must place the World Physical volume unr 156 // Must place the World Physical volume unrotated at (0,0,0).
150 // << 157 //
151 G4VPhysicalVolume* worldPV = new G4PVPlaceme << 158 G4VPhysicalVolume* worldPV
152 << 159 = new G4PVPlacement(
153 << 160 0, // no rotation
154 << 161 G4ThreeVector(), // at (0,0,0)
155 << 162 worldLV, // its logical volume
156 << 163 "World", // its name
157 << 164 0, // its mother volume
158 << 165 false, // no boolean operations
>> 166 0, // copy number
>> 167 fCheckOverlaps); // checking overlaps
159 168
160 // Target 169 // Target
>> 170
>> 171 G4ThreeVector positionTarget = G4ThreeVector(0,0,-(targetLength+trackerSize));
161 172
162 G4ThreeVector positionTarget = G4ThreeVector << 173 G4Tubs* targetS
163 << 174 = new G4Tubs("target",0.,targetRadius,targetLength,0.*deg,360.*deg);
164 G4Tubs* targetS = new G4Tubs("target", 0., t << 175 fLogicTarget
165 fLogicTarget = new G4LogicalVolume(targetS, << 176 = new G4LogicalVolume(targetS, fTargetMaterial,"Target",0,0,0);
166 new G4PVPlacement(0, // no rotation << 177 new G4PVPlacement(0, // no rotation
167 positionTarget, // at (x, << 178 positionTarget, // at (x,y,z)
168 fLogicTarget, // its logi << 179 fLogicTarget, // its logical volume
169 "Target", // its name << 180 "Target", // its name
170 worldLV, // its mother vo << 181 worldLV, // its mother volume
171 false, // no boolean oper << 182 false, // no boolean operations
172 0, // copy number << 183 0, // copy number
173 fCheckOverlaps); // check << 184 fCheckOverlaps); // checking overlaps
174 185
175 G4cout << "Target is " << 2 * targetLength / << 186 G4cout << "Target is " << 2*targetLength/cm << " cm of "
176 << G4endl; << 187 << fTargetMaterial->GetName() << G4endl;
177 188
178 // Tracker 189 // Tracker
>> 190
>> 191 G4ThreeVector positionTracker = G4ThreeVector(0,0,0);
179 192
180 G4ThreeVector positionTracker = G4ThreeVecto << 193 G4Tubs* trackerS
181 << 194 = new G4Tubs("tracker",0,trackerSize,trackerSize, 0.*deg, 360.*deg);
182 G4Tubs* trackerS = new G4Tubs("tracker", 0, << 195 G4LogicalVolume* trackerLV
183 G4LogicalVolume* trackerLV = new G4LogicalVo << 196 = new G4LogicalVolume(trackerS, air, "Tracker",0,0,0);
184 new G4PVPlacement(0, // no rotation << 197 new G4PVPlacement(0, // no rotation
185 positionTracker, // at (x << 198 positionTracker, // at (x,y,z)
186 trackerLV, // its logical << 199 trackerLV, // its logical volume
187 "Tracker", // its name << 200 "Tracker", // its name
188 worldLV, // its mother v << 201 worldLV, // its mother volume
189 false, // no boolean oper << 202 false, // no boolean operations
190 0, // copy number << 203 0, // copy number
191 fCheckOverlaps); // check << 204 fCheckOverlaps); // checking overlaps
192 205
193 // Tracker segments 206 // Tracker segments
194 << 207
195 // An example of Parameterised volumes 208 // An example of Parameterised volumes
196 // Dummy values for G4Tubs -- modified by pa 209 // Dummy values for G4Tubs -- modified by parameterised volume
197 210
198 G4Tubs* chamberS = new G4Tubs("tracker", 0, << 211 G4Tubs* chamberS
199 fLogicChamber = new G4LogicalVolume(chamberS << 212 = new G4Tubs("tracker",0, 100*cm, 100*cm, 0.*deg, 360.*deg);
200 << 213 fLogicChamber
>> 214 = new G4LogicalVolume(chamberS,fChamberMaterial,"Chamber",0,0,0);
>> 215
201 G4double firstPosition = -trackerSize + cham 216 G4double firstPosition = -trackerSize + chamberSpacing;
202 G4double firstLength = trackerLength / 10; << 217 G4double firstLength = trackerLength/10;
203 G4double lastLength = trackerLength; << 218 G4double lastLength = trackerLength;
204 219
205 G4VPVParameterisation* chamberParam = 220 G4VPVParameterisation* chamberParam =
206 new B2bChamberParameterisation(NbOfChamber << 221 new B2bChamberParameterisation(
207 firstPositi << 222 NbOfChambers, // NoChambers
208 chamberSpac << 223 firstPosition, // Z of center of first
209 chamberWidt << 224 chamberSpacing, // Z spacing of centers
210 firstLength << 225 chamberWidth, // chamber width
211 lastLength) << 226 firstLength, // initial length
212 << 227 lastLength); // final length
>> 228
213 // dummy value : kZAxis -- modified by param 229 // dummy value : kZAxis -- modified by parameterised volume
214 230
215 new G4PVParameterised("Chamber", // their n << 231 new G4PVParameterised("Chamber", // their name
216 fLogicChamber, // the << 232 fLogicChamber, // their logical volume
217 trackerLV, // Mother << 233 trackerLV, // Mother logical volume
218 kZAxis, // Are placed << 234 kZAxis, // Are placed along this axis
219 NbOfChambers, // Numb << 235 NbOfChambers, // Number of chambers
220 chamberParam, // The << 236 chamberParam, // The parametrisation
221 fCheckOverlaps); // c << 237 fCheckOverlaps); // checking overlaps
222 238
223 G4cout << "There are " << NbOfChambers << " 239 G4cout << "There are " << NbOfChambers << " chambers in the tracker region. "
224 << "\nThe chambers are " << chamberWi << 240 << "\nThe chambers are " << chamberWidth/cm << " cm of "
225 << "\nThe distance between chamber is << 241 << fChamberMaterial->GetName() << "\nThe distance between chamber is "
>> 242 << chamberSpacing/cm << " cm" << G4endl;
226 243
227 // Visualization attributes 244 // Visualization attributes
228 245
229 G4VisAttributes* boxVisAtt = new G4VisAttrib << 246 G4VisAttributes* boxVisAtt= new G4VisAttributes(G4Colour(1.0,1.0,1.0));
230 worldLV->SetVisAttributes(boxVisAtt); << 247 worldLV ->SetVisAttributes(boxVisAtt);
231 fLogicTarget->SetVisAttributes(boxVisAtt); << 248 fLogicTarget ->SetVisAttributes(boxVisAtt);
232 trackerLV->SetVisAttributes(boxVisAtt); << 249 trackerLV ->SetVisAttributes(boxVisAtt);
233 250
234 G4VisAttributes* chamberVisAtt = new G4VisAt << 251 G4VisAttributes* chamberVisAtt = new G4VisAttributes(G4Colour(1.0,1.0,0.0));
235 fLogicChamber->SetVisAttributes(chamberVisAt 252 fLogicChamber->SetVisAttributes(chamberVisAtt);
236 << 253
237 // Example of User Limits 254 // Example of User Limits
238 // 255 //
239 // Below is an example of how to set trackin 256 // Below is an example of how to set tracking constraints in a given
240 // logical volume 257 // logical volume
241 // 258 //
242 // Sets a max step length in the tracker reg 259 // Sets a max step length in the tracker region, with G4StepLimiter
243 260
244 G4double maxStep = 0.5 * chamberWidth; << 261 G4double maxStep = 0.5*chamberWidth;
245 fStepLimit = new G4UserLimits(maxStep); 262 fStepLimit = new G4UserLimits(maxStep);
246 trackerLV->SetUserLimits(fStepLimit); 263 trackerLV->SetUserLimits(fStepLimit);
247 << 264
248 /// Set additional contraints on the track, 265 /// Set additional contraints on the track, with G4UserSpecialCuts
249 /// 266 ///
250 /// G4double maxLength = 2*trackerLength, ma 267 /// G4double maxLength = 2*trackerLength, maxTime = 0.1*ns, minEkin = 10*MeV;
251 /// trackerLV->SetUserLimits(new G4UserLimit 268 /// trackerLV->SetUserLimits(new G4UserLimits(maxStep,
252 /// 269 /// maxLength,
253 /// 270 /// maxTime,
254 /// 271 /// minEkin));
255 272
256 // Always return the physical world 273 // Always return the physical world
257 274
258 return worldPV; 275 return worldPV;
259 } 276 }
260 277
261 //....oooOO0OOooo........oooOO0OOooo........oo 278 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
262 << 279
263 void B2bDetectorConstruction::ConstructSDandFi 280 void B2bDetectorConstruction::ConstructSDandField()
264 { 281 {
265 // Sensitive detectors 282 // Sensitive detectors
266 283
267 G4String trackerChamberSDname = "B2/TrackerC 284 G4String trackerChamberSDname = "B2/TrackerChamberSD";
268 B2TrackerSD* aTrackerSD = new B2TrackerSD(tr << 285 B2TrackerSD* aTrackerSD = new B2TrackerSD(trackerChamberSDname,
269 G4SDManager::GetSDMpointer()->AddNewDetector << 286 "TrackerHitsCollection");
270 SetSensitiveDetector(fLogicChamber, aTracker << 287 SetSensitiveDetector( fLogicChamber, aTrackerSD );
271 288
272 // Create global magnetic field messenger. 289 // Create global magnetic field messenger.
273 // Uniform magnetic field is then created au 290 // Uniform magnetic field is then created automatically if
274 // the field value is not zero. 291 // the field value is not zero.
275 G4ThreeVector fieldValue = G4ThreeVector(); 292 G4ThreeVector fieldValue = G4ThreeVector();
276 fMagFieldMessenger = new G4GlobalMagFieldMes 293 fMagFieldMessenger = new G4GlobalMagFieldMessenger(fieldValue);
277 fMagFieldMessenger->SetVerboseLevel(1); 294 fMagFieldMessenger->SetVerboseLevel(1);
278 } 295 }
279 296
280 //....oooOO0OOooo........oooOO0OOooo........oo 297 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
281 298
282 void B2bDetectorConstruction::SetTargetMateria 299 void B2bDetectorConstruction::SetTargetMaterial(G4String materialName)
283 { 300 {
284 G4NistManager* nistManager = G4NistManager:: 301 G4NistManager* nistManager = G4NistManager::Instance();
285 302
286 G4Material* pttoMaterial = nistManager->Find << 303 G4Material* pttoMaterial =
>> 304 nistManager->FindOrBuildMaterial(materialName);
287 305
288 if (fTargetMaterial != pttoMaterial) { 306 if (fTargetMaterial != pttoMaterial) {
289 if (pttoMaterial) { << 307 if ( pttoMaterial ) {
290 fTargetMaterial = pttoMaterial; << 308 fTargetMaterial = pttoMaterial;
291 if (fLogicTarget) fLogicTarget->SetMater << 309 if (fLogicTarget) fLogicTarget->SetMaterial(fTargetMaterial);
292 G4cout << "\n----> The target is made of << 310 G4cout << "\n----> The target is made of " << materialName << G4endl;
293 } << 311 } else {
294 else { << 312 G4cout << "\n--> WARNING from SetTargetMaterial : "
295 G4cout << "\n--> WARNING from SetTarget << 313 << materialName << " not found" << G4endl;
296 << G4endl; << 314 }
297 } <<
298 } 315 }
299 } 316 }
300 << 317
301 //....oooOO0OOooo........oooOO0OOooo........oo 318 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
302 319
303 void B2bDetectorConstruction::SetChamberMateri 320 void B2bDetectorConstruction::SetChamberMaterial(G4String materialName)
304 { 321 {
305 G4NistManager* nistManager = G4NistManager:: 322 G4NistManager* nistManager = G4NistManager::Instance();
306 323
307 G4Material* pttoMaterial = nistManager->Find << 324 G4Material* pttoMaterial =
>> 325 nistManager->FindOrBuildMaterial(materialName);
308 326
309 if (fChamberMaterial != pttoMaterial) { 327 if (fChamberMaterial != pttoMaterial) {
310 if (pttoMaterial) { << 328 if ( pttoMaterial ) {
311 fChamberMaterial = pttoMaterial; << 329 fChamberMaterial = pttoMaterial;
312 if (fLogicChamber) fLogicChamber->SetMat << 330 if (fLogicChamber) fLogicChamber->SetMaterial(fChamberMaterial);
313 G4cout << "\n----> The chambers are made << 331 G4cout << "\n----> The chambers are made of " << materialName << G4endl;
314 } << 332 } else {
315 else { << 333 G4cout << "\n--> WARNING from SetChamberMaterial : "
316 G4cout << "\n--> WARNING from SetChambe << 334 << materialName << " not found" << G4endl;
317 << G4endl; << 335 }
318 } <<
319 } 336 }
320 } 337 }
321 338
322 //....oooOO0OOooo........oooOO0OOooo........oo 339 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
323 << 340
324 void B2bDetectorConstruction::SetMaxStep(G4dou 341 void B2bDetectorConstruction::SetMaxStep(G4double maxStep)
325 { 342 {
326 if ((fStepLimit) && (maxStep > 0.)) fStepLim << 343 if ((fStepLimit)&&(maxStep>0.)) fStepLimit->SetMaxAllowedStep(maxStep);
327 } 344 }
328 345
329 //....oooOO0OOooo........oooOO0OOooo........oo 346 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
330 347