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1 // 1 //
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19 // * technical work of the GEANT4 collaboratio 19 // * technical work of the GEANT4 collaboration. *
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24 // ******************************************* 24 // ********************************************************************
25 // 25 //
26 // Please cite the following paper if you use 26 // Please cite the following paper if you use this software
27 // Nucl.Instrum.Meth.B260:20-27, 2007 27 // Nucl.Instrum.Meth.B260:20-27, 2007
28 // 28 //
29 // Based on purging magnet advanced example. 29 // Based on purging magnet advanced example.
30 // 30 //
31 31
32 #include "DetectorConstruction.hh" 32 #include "DetectorConstruction.hh"
33 33
34 #include "G4PhysicalConstants.hh" 34 #include "G4PhysicalConstants.hh"
35 #include "G4SystemOfUnits.hh" 35 #include "G4SystemOfUnits.hh"
36 #include "G4NistManager.hh" 36 #include "G4NistManager.hh"
37 #include "G4RunManager.hh" 37 #include "G4RunManager.hh"
38 38
39 // Field 39 // Field
40 #include "G4Mag_UsualEqRhs.hh" 40 #include "G4Mag_UsualEqRhs.hh"
41 #include "G4TransportationManager.hh" 41 #include "G4TransportationManager.hh"
42 #include "G4ClassicalRK4.hh" 42 #include "G4ClassicalRK4.hh"
43 #include "G4PropagatorInField.hh" 43 #include "G4PropagatorInField.hh"
44 44
45 //....oooOO0OOooo........oooOO0OOooo........oo 45 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
46 46
47 G4ThreadLocal TabulatedField3D* DetectorConstr 47 G4ThreadLocal TabulatedField3D* DetectorConstruction::fField = 0;
48 48
49 //....oooOO0OOooo........oooOO0OOooo........oo 49 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
50 50
51 DetectorConstruction::DetectorConstruction() 51 DetectorConstruction::DetectorConstruction()
52 { 52 {
53 fDetectorMessenger = new DetectorMessenger(th 53 fDetectorMessenger = new DetectorMessenger(this);
54 54
55 // Default values (square field, coef calcula 55 // Default values (square field, coef calculation, profile)
56 56
57 fModel=1; 57 fModel=1;
58 fG1=-11.964623; 58 fG1=-11.964623;
59 fG2=16.494652; 59 fG2=16.494652;
60 fG3=9.866770; 60 fG3=9.866770;
61 fG4=-6.244493; 61 fG4=-6.244493;
62 fCoef=0; 62 fCoef=0;
63 fProfile=1; 63 fProfile=1;
64 fGrid=0; 64 fGrid=0;
65 65
66 } 66 }
67 67
68 //....oooOO0OOooo........oooOO0OOooo........oo 68 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
69 69
70 DetectorConstruction::~DetectorConstruction() 70 DetectorConstruction::~DetectorConstruction()
71 { delete fDetectorMessenger;} 71 { delete fDetectorMessenger;}
72 72
73 //....oooOO0OOooo........oooOO0OOooo........oo 73 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
74 74
75 G4VPhysicalVolume* DetectorConstruction::Const 75 G4VPhysicalVolume* DetectorConstruction::Construct()
76 76
77 { 77 {
78 DefineMaterials(); 78 DefineMaterials();
79 return ConstructVolumes(); 79 return ConstructVolumes();
80 } 80 }
81 81
82 //....oooOO0OOooo........oooOO0OOooo........oo 82 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
83 83
84 void DetectorConstruction::DefineMaterials() 84 void DetectorConstruction::DefineMaterials()
85 { 85 {
86 G4String name, symbol; 86 G4String name, symbol;
87 G4double density; 87 G4double density;
88 88
89 G4double z, a; 89 G4double z, a;
90 90
91 // Vacuum standard definition... 91 // Vacuum standard definition...
92 density = universe_mean_density; 92 density = universe_mean_density;
93 G4Material* vacuum = new G4Material(name="Va 93 G4Material* vacuum = new G4Material(name="Vacuum", z=1., a=1.01*g/mole,
94 density); 94 density);
95 95
96 // NIST 96 // NIST
97 G4NistManager *man=G4NistManager::Instance() 97 G4NistManager *man=G4NistManager::Instance();
98 man->SetVerbose(1); 98 man->SetVerbose(1);
99 99
100 // 100 //
101 101
102 G4cout << G4endl << *(G4Material::GetMateria 102 G4cout << G4endl << *(G4Material::GetMaterialTable()) << G4endl;
103 103
104 // Default materials in setup. 104 // Default materials in setup.
105 fDefaultMaterial = vacuum; 105 fDefaultMaterial = vacuum;
106 fGridMaterial = man->FindOrBuildMaterial("G4 106 fGridMaterial = man->FindOrBuildMaterial("G4_Ni");
107 } 107 }
108 108
109 //....oooOO0OOooo........oooOO0OOooo........oo 109 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
110 110
111 G4VPhysicalVolume* DetectorConstruction::Const 111 G4VPhysicalVolume* DetectorConstruction::ConstructVolumes()
112 { 112 {
113 113
114 fSolidWorld = new G4Box("World", //it 114 fSolidWorld = new G4Box("World", //its name
115 12*m/2,12*m/2,22*m/2); //its size 115 12*m/2,12*m/2,22*m/2); //its size
116 116
117 117
118 fLogicWorld = new G4LogicalVolume(fSolidWorl 118 fLogicWorld = new G4LogicalVolume(fSolidWorld, //its solid
119 fDefaultMaterial, //its material 119 fDefaultMaterial, //its material
120 "World"); //its name 120 "World"); //its name
121 121
122 fPhysiWorld = new G4PVPlacement(0, //no 122 fPhysiWorld = new G4PVPlacement(0, //no rotation
123 G4ThreeVector(), //at (0,0,0) 123 G4ThreeVector(), //at (0,0,0)
124 "World", // 124 "World", //its name
125 fLogicWorld, 125 fLogicWorld, //its logical volume
126 NULL, // 126 NULL, //its mother volume
127 false, // 127 false, //no boolean operation
128 0); //co 128 0); //copy number
129 129
130 130
131 // MAGNET VOLUME 131 // MAGNET VOLUME
132 132
133 fSolidVol = new G4Box("Vol", //its na 133 fSolidVol = new G4Box("Vol", //its name
134 10*m/2,10*m/2,9.120*m/2); //its si 134 10*m/2,10*m/2,9.120*m/2); //its size
135 135
136 136
137 fLogicVol = new G4LogicalVolume(fSolidVol, 137 fLogicVol = new G4LogicalVolume(fSolidVol, //its solid
138 fDefaultMaterial, //its material 138 fDefaultMaterial, //its material
139 "Vol"); //its name 139 "Vol"); //its name
140 140
141 fPhysiVol = new G4PVPlacement(0, //no r 141 fPhysiVol = new G4PVPlacement(0, //no rotation
142 G4ThreeVector(0,0,-4310*mm), //at ( 142 G4ThreeVector(0,0,-4310*mm), //at (0,0,0)
143 "Vol", // 143 "Vol", //its name
144 fLogicVol, 144 fLogicVol, //its logical volume
145 fPhysiWorld, 145 fPhysiWorld, //its mother volume
146 false, // 146 false, //no boolean operation
147 0); //co 147 0); //copy number
148 148
149 // GRID 149 // GRID
150 150
151 if (fGrid==1) 151 if (fGrid==1)
152 { 152 {
153 153
154 G4cout << G4endl; 154 G4cout << G4endl;
155 155
156 G4cout << " ********************** " << G4en 156 G4cout << " ********************** " << G4endl;
157 G4cout << " **** GRID IN PLACE *** " << G4en 157 G4cout << " **** GRID IN PLACE *** " << G4endl;
158 G4cout << " ********************** " << G4en 158 G4cout << " ********************** " << G4endl;
159 159
160 G4double x_grid=5.0*mm; 160 G4double x_grid=5.0*mm;
161 G4double y_grid=5.0*mm; 161 G4double y_grid=5.0*mm;
162 G4double grid_Zpos=(250+200)*mm; // 250 162 G4double grid_Zpos=(250+200)*mm; // 250+10 mm for object size of 50µm diam
163 163
164 //G4double thickness_grid=10*micrometer; 164 //G4double thickness_grid=10*micrometer;
165 G4double thickness_grid=100*micrometer; 165 G4double thickness_grid=100*micrometer;
166 166
167 G4double z_grid=thickness_grid/2.0; 167 G4double z_grid=thickness_grid/2.0;
168 168
169 fSolidGridVol= new G4Box("GridVolume",x_grid 169 fSolidGridVol= new G4Box("GridVolume",x_grid,y_grid,z_grid); //its size
170 170
171 fLogicGridVol = new G4LogicalVolume(fSolidGr 171 fLogicGridVol = new G4LogicalVolume(fSolidGridVol, //its solid
172 fGridMaterial, //its 172 fGridMaterial, //its material
173 "GridVolume"); //its name 173 "GridVolume"); //its name
174 174
175 fPhysiGridVol = new G4PVPlacement(0, 175 fPhysiGridVol = new G4PVPlacement(0, //no rotation
176 G4ThreeVector(0,0,grid_Zpos), // o 176 G4ThreeVector(0,0,grid_Zpos), // origin
177 fLogicGridVol 177 fLogicGridVol, //its logical volume
178 "GridVolume", 178 "GridVolume", //its name
179 fLogicWorld, 179 fLogicWorld, //its mother volume
180 false, 180 false, //no boolean operation
181 0); 181 0);
182 182
183 // Holes in grid 183 // Holes in grid
184 184
185 G4double holeSize= 9e-3*mm; 185 G4double holeSize= 9e-3*mm;
186 G4double pix_grid=1.3e-2*mm; 186 G4double pix_grid=1.3e-2*mm;
187 G4int num_half_grid=100; 187 G4int num_half_grid=100;
188 188
189 fSolidGridVol_Hole= new G4Box("GridHole",hol 189 fSolidGridVol_Hole= new G4Box("GridHole",holeSize/2,holeSize/2,z_grid); //its size
190 190
191 fLogicGridVol_Hole = new G4LogicalVolume(fSo 191 fLogicGridVol_Hole = new G4LogicalVolume(fSolidGridVol_Hole, //its solid
192 fDefaultMaterial, 192 fDefaultMaterial, //its material
193 "GridHole"); 193 "GridHole"); //its name
194 194
195 195
196 for(int i=-num_half_grid;i<num_half_grid;i++ 196 for(int i=-num_half_grid;i<num_half_grid;i++)
197 { 197 {
198 for (int j=-num_half_grid;j<num_half_gri 198 for (int j=-num_half_grid;j<num_half_grid;j++)
199 { 199 {
200 200
201 G4double x0_grid,y0_grid,z0_grid; 201 G4double x0_grid,y0_grid,z0_grid;
202 G4int number_index_grid; 202 G4int number_index_grid;
203 203
204 x0_grid=pix_grid*i; 204 x0_grid=pix_grid*i;
205 y0_grid=pix_grid*j; 205 y0_grid=pix_grid*j;
206 z0_grid=0.0*mm; 206 z0_grid=0.0*mm;
207 207
208 number_index_grid=(i+num_half_grid)*1000+( 208 number_index_grid=(i+num_half_grid)*1000+(j+num_half_grid);
209 209
210 fPhysiGridVol_Hole = new G4PVPlacement( 210 fPhysiGridVol_Hole = new G4PVPlacement(0, //no rotation
211 G4ThreeVector(x0_grid,y0_grid,z0_gr 211 G4ThreeVector(x0_grid,y0_grid,z0_grid),//origin
212 fLogicGridVol 212 fLogicGridVol_Hole, //its logical volume
213 "GridHole", //its name 213 "GridHole", //its name
214 fLogicGridVol 214 fLogicGridVol, //its mother volume
215 false, 215 false, //no boolean operation
216 number_index_ 216 number_index_grid);
217 } 217 }
218 } 218 }
219 219
220 // Grid imaging plane 220 // Grid imaging plane
221 221
222 G4double ContVolSizeXY = 1*m; 222 G4double ContVolSizeXY = 1*m;
223 G4double ImPlaneWidth = 0.001*mm; 223 G4double ImPlaneWidth = 0.001*mm;
224 224
225 fSolidControlVol_GridShadow = 225 fSolidControlVol_GridShadow =
226 new G4Box 226 new G4Box
227 ("ControlVol_GridShadow", ContVolSizeXY/2, 227 ("ControlVol_GridShadow", ContVolSizeXY/2, ContVolSizeXY/2 , ImPlaneWidth/2);
228 228
229 fLogicControlVol_GridShadow = 229 fLogicControlVol_GridShadow =
230 new G4LogicalVolume 230 new G4LogicalVolume
231 (fSolidControlVol_GridShadow, fDefaultMate 231 (fSolidControlVol_GridShadow, fDefaultMaterial, "ControlVol_GridShadow");
232 232
233 fPhysiControlVol_GridShadow = 233 fPhysiControlVol_GridShadow =
234 new G4PVPlacement 234 new G4PVPlacement
235 ( 0, G4ThreeVector(0,0,(250+300)*mm), fLog 235 ( 0, G4ThreeVector(0,0,(250+300)*mm), fLogicControlVol_GridShadow, "ControlVol_GridShadow",
236 fLogicWorld, false, 0); 236 fLogicWorld, false, 0);
237 237
238 238
239 } // end GRID 239 } // end GRID
240 240
241 // STEP MINIMUM SIZE 241 // STEP MINIMUM SIZE
242 fLogicVol->SetUserLimits(new G4UserLimits(1* 242 fLogicVol->SetUserLimits(new G4UserLimits(1*mm));
243 243
244 return fPhysiWorld; 244 return fPhysiWorld;
245 } 245 }
246 246
247 //....oooOO0OOooo........oooOO0OOooo........oo 247 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
248 248
249 void DetectorConstruction::SetG1(G4float value 249 void DetectorConstruction::SetG1(G4float value)
250 { 250 {
251 fG1 = value; 251 fG1 = value;
252 G4RunManager::GetRunManager()->ReinitializeG 252 G4RunManager::GetRunManager()->ReinitializeGeometry();
253 } 253 }
254 254
255 //....oooOO0OOooo........oooOO0OOooo........oo 255 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
256 256
257 void DetectorConstruction::SetG2(G4float value 257 void DetectorConstruction::SetG2(G4float value)
258 { 258 {
259 fG2 = value; 259 fG2 = value;
260 G4RunManager::GetRunManager()->ReinitializeG 260 G4RunManager::GetRunManager()->ReinitializeGeometry();
261 } 261 }
262 262
263 //....oooOO0OOooo........oooOO0OOooo........oo 263 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
264 264
265 void DetectorConstruction::SetG3(G4float value 265 void DetectorConstruction::SetG3(G4float value)
266 { 266 {
267 fG3 = value; 267 fG3 = value;
268 G4RunManager::GetRunManager()->ReinitializeG 268 G4RunManager::GetRunManager()->ReinitializeGeometry();
269 } 269 }
270 270
271 //....oooOO0OOooo........oooOO0OOooo........oo 271 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
272 272
273 void DetectorConstruction::SetG4(G4float value 273 void DetectorConstruction::SetG4(G4float value)
274 { 274 {
275 fG4 = value; 275 fG4 = value;
276 G4RunManager::GetRunManager()->ReinitializeG 276 G4RunManager::GetRunManager()->ReinitializeGeometry();
277 } 277 }
278 278
279 //....oooOO0OOooo........oooOO0OOooo........oo 279 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
280 280
281 void DetectorConstruction::SetModel(G4int mode 281 void DetectorConstruction::SetModel(G4int modelChoice)
282 { 282 {
283 if (modelChoice==1) fModel=1; 283 if (modelChoice==1) fModel=1;
284 if (modelChoice==2) fModel=2; 284 if (modelChoice==2) fModel=2;
285 if (modelChoice==3) fModel=3; 285 if (modelChoice==3) fModel=3;
286 G4RunManager::GetRunManager()->ReinitializeG 286 G4RunManager::GetRunManager()->ReinitializeGeometry();
287 } 287 }
288 288
289 //....oooOO0OOooo........oooOO0OOooo........oo 289 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
290 290
291 void DetectorConstruction::SetCoef(G4int val) 291 void DetectorConstruction::SetCoef(G4int val)
292 { 292 {
293 fCoef=val; 293 fCoef=val;
294 G4RunManager::GetRunManager()->ReinitializeG 294 G4RunManager::GetRunManager()->ReinitializeGeometry();
295 } 295 }
296 296
297 //....oooOO0OOooo........oooOO0OOooo........oo 297 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
298 298
299 G4int DetectorConstruction::GetCoef() 299 G4int DetectorConstruction::GetCoef()
300 { 300 {
301 return fCoef; 301 return fCoef;
302 } 302 }
303 303
304 //....oooOO0OOooo........oooOO0OOooo........oo 304 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
305 305
306 void DetectorConstruction::SetProfile(G4int my 306 void DetectorConstruction::SetProfile(G4int myProfile)
307 { 307 {
308 fProfile=myProfile; 308 fProfile=myProfile;
309 G4RunManager::GetRunManager()->ReinitializeG 309 G4RunManager::GetRunManager()->ReinitializeGeometry();
310 } 310 }
311 311
312 //....oooOO0OOooo........oooOO0OOooo........oo 312 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
313 313
314 void DetectorConstruction::SetGrid(G4int myGri 314 void DetectorConstruction::SetGrid(G4int myGrid)
315 { 315 {
316 fGrid=myGrid; 316 fGrid=myGrid;
317 G4RunManager::GetRunManager()->ReinitializeG 317 G4RunManager::GetRunManager()->ReinitializeGeometry();
318 } 318 }
319 319
320 //....oooOO0OOooo........oooOO0OOooo........oo 320 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
321 321
322 void DetectorConstruction::ConstructSDandField 322 void DetectorConstruction::ConstructSDandField()
323 { 323 {
324 fField = new TabulatedField3D(fG1, fG2, 324 fField = new TabulatedField3D(fG1, fG2, fG3, fG4, fModel);
325 325
326 //This is thread-local 326 //This is thread-local
327 G4FieldManager* fFieldMgr = 327 G4FieldManager* fFieldMgr =
328 G4TransportationManager::GetTransportationMa 328 G4TransportationManager::GetTransportationManager()->GetFieldManager();
329 329
330 G4Mag_UsualEqRhs* fEquation = new G4Mag_ 330 G4Mag_UsualEqRhs* fEquation = new G4Mag_UsualEqRhs (fField);
331 331
332 G4ClassicalRK4* fStepper = new G4Classic 332 G4ClassicalRK4* fStepper = new G4ClassicalRK4 (fEquation);
333 333
334 G4ChordFinder* fChordFinder = new G4Chor 334 G4ChordFinder* fChordFinder = new G4ChordFinder(fField,1e-9*m,fStepper);
335 335
336 fFieldMgr->SetChordFinder(fChordFinder); 336 fFieldMgr->SetChordFinder(fChordFinder);
337 fFieldMgr->SetDetectorField(fField); 337 fFieldMgr->SetDetectorField(fField);
338 338
339 // SI: 01-07-2018 : following settings w 339 // SI: 01-07-2018 : following settings were initially set to 1e-9*m
340 // instead of 1e-9*m, but they now indu 340 // instead of 1e-9*m, but they now induce warnings as
341 // *** G4Exception : GeomNav1002 341 // *** G4Exception : GeomNav1002
342 // issued by : G4PropagatorInField::Com 342 // issued by : G4PropagatorInField::ComputeStep
343 343
344 fFieldMgr->GetChordFinder()->SetDeltaCho 344 fFieldMgr->GetChordFinder()->SetDeltaChord(1e-7*m);
345 fFieldMgr->SetDeltaIntersection(1e-7*m); 345 fFieldMgr->SetDeltaIntersection(1e-7*m);
346 fFieldMgr->SetDeltaOneStep(1e-7*m); 346 fFieldMgr->SetDeltaOneStep(1e-7*m);
347 347
348 // 348 //
349 349
350 // To avoid G4MagIntegratorDriver::OneGo 350 // To avoid G4MagIntegratorDriver::OneGoodStep:Stepsize underflows in Stepper
351 351
352 if (fCoef==1) 352 if (fCoef==1)
353 { 353 {
354 G4PropagatorInField* fPropInField = 354 G4PropagatorInField* fPropInField =
355 G4TransportationManager::GetTranspor 355 G4TransportationManager::GetTransportationManager()->GetPropagatorInField();
356 fPropInField->SetMinimumEpsilonStep(1e 356 fPropInField->SetMinimumEpsilonStep(1e-11);
357 fPropInField->SetMaximumEpsilonStep(1e 357 fPropInField->SetMaximumEpsilonStep(1e-10);
358 358
359 } 359 }
360 else 360 else
361 { 361 {
362 G4PropagatorInField* fPropInField = 362 G4PropagatorInField* fPropInField =
363 G4TransportationManager::GetTranspor 363 G4TransportationManager::GetTransportationManager()->GetPropagatorInField();
364 fPropInField->SetMinimumEpsilonStep(1e 364 fPropInField->SetMinimumEpsilonStep(1e-9);
365 fPropInField->SetMaximumEpsilonStep(1e 365 fPropInField->SetMaximumEpsilonStep(1e-8);
366 } 366 }
367 367
368 } 368 }
369 369
370 370