source: trunk/examples/extended/electromagnetic/TestEm3/src/DetectorConstruction.cc@ 1237

Last change on this file since 1237 was 1230, checked in by garnier, 16 years ago

update to geant4.9.3
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25//
26// $Id: DetectorConstruction.cc,v 1.23 2009/03/04 18:49:17 maire Exp $
27// GEANT4 tag $Name: geant4-09-03-cand-01 $
28//
29//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
30//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
31
32#include "DetectorConstruction.hh"
33#include "DetectorMessenger.hh"
34
35#include "G4NistManager.hh"
36#include "G4Material.hh"
37#include "G4Box.hh"
38#include "G4LogicalVolume.hh"
39#include "G4PVPlacement.hh"
40#include "G4PVReplica.hh"
41#include "G4UniformMagField.hh"
42
43#include "G4GeometryManager.hh"
44#include "G4PhysicalVolumeStore.hh"
45#include "G4LogicalVolumeStore.hh"
46#include "G4SolidStore.hh"
47
48#include "G4UImanager.hh"
49#include "G4UnitsTable.hh"
50#include <iomanip>
51
52//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
53
54DetectorConstruction::DetectorConstruction()
55:defaultMaterial(0),solidWorld(0),logicWorld(0),physiWorld(0),
56 solidCalor(0),logicCalor(0),physiCalor(0),
57 solidLayer(0),logicLayer(0),physiLayer(0),
58 magField(0)
59{
60 // default parameter values of the calorimeter
61 NbOfAbsor = 2;
62 AbsorThickness[1] = 2.3*mm;
63 AbsorThickness[2] = 5.7*mm;
64 NbOfLayers = 50;
65 CalorSizeYZ = 40.*cm;
66 ComputeCalorParameters();
67
68 // materials
69 DefineMaterials();
70 SetWorldMaterial("Galactic");
71 SetAbsorMaterial(1,"Lead");
72 SetAbsorMaterial(2,"liquidArgon");
73
74 // create commands for interactive definition of the calorimeter
75 detectorMessenger = new DetectorMessenger(this);
76}
77
78//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
79
80DetectorConstruction::~DetectorConstruction()
81{
82 delete detectorMessenger;
83}
84
85//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
86
87G4VPhysicalVolume* DetectorConstruction::Construct()
88{
89 return ConstructCalorimeter();
90}
91
92//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
93
94void DetectorConstruction::DefineMaterials()
95{
96 // This function illustrates the possible ways to define materials using
97 // G4 database on G4Elements
98 G4NistManager* manager = G4NistManager::Instance();
99 manager->SetVerbose(0);
100 //
101 // define Elements
102 //
103 G4double z,a;
104
105 G4Element* H = manager->FindOrBuildElement(1);
106 G4Element* C = manager->FindOrBuildElement(6);
107 G4Element* N = manager->FindOrBuildElement(7);
108 G4Element* O = manager->FindOrBuildElement(8);
109 G4Element* Si = manager->FindOrBuildElement(14);
110 G4Element* Ge = manager->FindOrBuildElement(32);
111 G4Element* Sb = manager->FindOrBuildElement(51);
112 G4Element* I = manager->FindOrBuildElement(53);
113 G4Element* Cs = manager->FindOrBuildElement(55);
114 G4Element* Pb = manager->FindOrBuildElement(82);
115 G4Element* Bi = manager->FindOrBuildElement(83);
116
117 //
118 // define an Element from isotopes, by relative abundance
119 //
120 G4int iz, n; //iz=number of protons in an isotope;
121 // n=number of nucleons in an isotope;
122 G4int ncomponents;
123 G4double abundance;
124
125 G4Isotope* U5 = new G4Isotope("U235", iz=92, n=235, a=235.01*g/mole);
126 G4Isotope* U8 = new G4Isotope("U238", iz=92, n=238, a=238.03*g/mole);
127
128 G4Element* U = new G4Element("enriched Uranium", "U", ncomponents=2);
129 U->AddIsotope(U5, abundance= 90.*perCent);
130 U->AddIsotope(U8, abundance= 10.*perCent);
131
132 //
133 // define simple materials
134 //
135 G4double density;
136
137 new G4Material("liquidH2", z=1., a= 1.008*g/mole, density= 70.8*mg/cm3);
138 new G4Material("Aluminium", z=13., a= 26.98*g/mole, density= 2.700*g/cm3);
139 new G4Material("Titanium", z=22., a= 47.867*g/mole, density= 4.54*g/cm3);
140 new G4Material("Iron", z=26., a= 55.85*g/mole, density= 7.870*g/cm3);
141 new G4Material("Copper", z=29., a= 63.55*g/mole, density= 8.960*g/cm3);
142 new G4Material("Tungsten", z=74., a= 183.85*g/mole, density= 19.30*g/cm3);
143 new G4Material("Gold", z=79., a= 196.97*g/mole, density= 19.32*g/cm3);
144 new G4Material("Uranium", z=92., a= 238.03*g/mole, density= 18.95*g/cm3);
145
146 //
147 // define a material from elements. case 1: chemical molecule
148 //
149 G4int natoms;
150
151 G4Material* H2O =
152 new G4Material("Water", density= 1.000*g/cm3, ncomponents=2);
153 H2O->AddElement(H, natoms=2);
154 H2O->AddElement(O, natoms=1);
155 H2O->GetIonisation()->SetMeanExcitationEnergy(75.0*eV);
156 H2O->SetChemicalFormula("H_2O");
157
158 G4Material* CH =
159 new G4Material("Polystyrene", density= 1.032*g/cm3, ncomponents=2);
160 CH->AddElement(C, natoms=1);
161 CH->AddElement(H, natoms=1);
162
163 G4Material* Sci =
164 new G4Material("Scintillator", density= 1.032*g/cm3, ncomponents=2);
165 Sci->AddElement(C, natoms=9);
166 Sci->AddElement(H, natoms=10);
167
168 Sci->GetIonisation()->SetBirksConstant(0.126*mm/MeV);
169
170 G4Material* Lct =
171 new G4Material("Lucite", density= 1.185*g/cm3, ncomponents=3);
172 Lct->AddElement(C, 59.97*perCent);
173 Lct->AddElement(H, 8.07*perCent);
174 Lct->AddElement(O, 31.96*perCent);
175
176 G4Material* Sili =
177 new G4Material("Silicon", density= 2.330*g/cm3, ncomponents=1);
178 Sili->AddElement(Si, natoms=1);
179
180 G4Material* SiO2 =
181 new G4Material("quartz", density= 2.200*g/cm3, ncomponents=2);
182 SiO2->AddElement(Si, natoms=1);
183 SiO2->AddElement(O , natoms=2);
184
185 G4Material* G10 =
186 new G4Material("NemaG10", density= 1.700*g/cm3, ncomponents=4);
187 G10->AddElement(Si, natoms=1);
188 G10->AddElement(O , natoms=2);
189 G10->AddElement(C , natoms=3);
190 G10->AddElement(H , natoms=3);
191
192 G4Material* CsI =
193 new G4Material("CsI", density= 4.534*g/cm3, ncomponents=2);
194 CsI->AddElement(Cs, natoms=1);
195 CsI->AddElement(I , natoms=1);
196 CsI->GetIonisation()->SetMeanExcitationEnergy(553.1*eV);
197
198 G4Material* BGO =
199 new G4Material("BGO", density= 7.10*g/cm3, ncomponents=3);
200 BGO->AddElement(O , natoms=12);
201 BGO->AddElement(Ge, natoms= 3);
202 BGO->AddElement(Bi, natoms= 4);
203
204 //SiNx
205 density= 3.1 *g/cm3;
206 G4Material* SiNx= new G4Material("SiNx", density, ncomponents=3);
207 SiNx-> AddElement(Si, 300);
208 SiNx-> AddElement(N, 310);
209 SiNx-> AddElement(H, 6);
210
211 //
212 // define gaseous materials using G4 NIST database
213 //
214 G4double fractionmass;
215
216 G4Material* Air = manager->FindOrBuildMaterial("G4_AIR");
217 manager->ConstructNewGasMaterial("Air20","G4_AIR",293.*kelvin,1.*atmosphere);
218
219 G4Material* lAr = manager->FindOrBuildMaterial("G4_lAr");
220 G4Material* lArEm3 = new G4Material("liquidArgon", density= 1.390*g/cm3, ncomponents=1);
221 lArEm3->AddMaterial(lAr, fractionmass=1.0);
222
223 //
224 // define a material from elements and others materials (mixture of mixtures)
225 //
226
227 G4Material* Lead = new G4Material("Lead", density= 11.35*g/cm3, ncomponents=1);
228 Lead->AddElement(Pb, fractionmass=1.0);
229
230 G4Material* LeadSb = new G4Material("LeadSb", density= 11.35*g/cm3, ncomponents=2);
231 LeadSb->AddElement(Sb, fractionmass=4.*perCent);
232 LeadSb->AddElement(Pb, fractionmass=96.*perCent);
233
234 G4Material* Aerog = new G4Material("Aerogel", density= 0.200*g/cm3, ncomponents=3);
235 Aerog->AddMaterial(SiO2, fractionmass=62.5*perCent);
236 Aerog->AddMaterial(H2O , fractionmass=37.4*perCent);
237 Aerog->AddElement (C , fractionmass= 0.1*perCent);
238
239 //
240 // examples of gas in non STP conditions
241 //
242 G4double temperature, pressure;
243
244 G4Material* CO2 =
245 new G4Material("CarbonicGas", density= 27.*mg/cm3, ncomponents=2,
246 kStateGas, temperature= 325.*kelvin, pressure= 50.*atmosphere);
247 CO2->AddElement(C, natoms=1);
248 CO2->AddElement(O, natoms=2);
249
250 G4Material* steam =
251 new G4Material("WaterSteam", density= 1.0*mg/cm3, ncomponents=1,
252 kStateGas, temperature= 273*kelvin, pressure= 1*atmosphere);
253 steam->AddMaterial(H2O, fractionmass=1.);
254
255 new G4Material("ArgonGas", z=18, a=39.948*g/mole, density= 1.782*mg/cm3,
256 kStateGas, 273.15*kelvin, 1*atmosphere);
257 //
258 // examples of vacuum
259 //
260
261 density = universe_mean_density; //from PhysicalConstants.h
262 pressure = 3.e-18*pascal;
263 temperature = 2.73*kelvin;
264 new G4Material("Galactic", z=1., a=1.008*g/mole, density,
265 kStateGas,temperature,pressure);
266
267 density = 1.e-5*g/cm3;
268 pressure = 2.e-2*bar;
269 temperature = STP_Temperature; //from PhysicalConstants.h
270 G4Material* beam =
271 new G4Material("Beam", density, ncomponents=1,
272 kStateGas,temperature,pressure);
273 beam->AddMaterial(Air, fractionmass=1.);
274
275 // G4cout << *(G4Material::GetMaterialTable()) << G4endl;
276}
277
278//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
279
280void DetectorConstruction::ComputeCalorParameters()
281{
282 // Compute derived parameters of the calorimeter
283 LayerThickness = 0.;
284 for (G4int iAbs=1; iAbs<=NbOfAbsor; iAbs++) {
285 LayerThickness += AbsorThickness[iAbs];
286 }
287 CalorThickness = NbOfLayers*LayerThickness;
288 WorldSizeX = 1.2*CalorThickness;
289 WorldSizeYZ = 1.2*CalorSizeYZ;
290}
291
292//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
293
294G4VPhysicalVolume* DetectorConstruction::ConstructCalorimeter()
295{
296 // complete the Calor parameters definition
297 ComputeCalorParameters();
298
299 // Cleanup old geometry
300 G4GeometryManager::GetInstance()->OpenGeometry();
301 G4PhysicalVolumeStore::GetInstance()->Clean();
302 G4LogicalVolumeStore::GetInstance()->Clean();
303 G4SolidStore::GetInstance()->Clean();
304
305 //
306 // World
307 //
308
309 solidWorld = new G4Box("World", //its name
310 WorldSizeX/2,WorldSizeYZ/2,WorldSizeYZ/2); //its size
311
312 logicWorld = new G4LogicalVolume(solidWorld, //its solid
313 defaultMaterial, //its material
314 "World"); //its name
315
316 physiWorld = new G4PVPlacement(0, //no rotation
317 G4ThreeVector(), //at (0,0,0)
318 logicWorld, //its logical volume
319 "World", //its name
320 0, //its mother volume
321 false, //no boolean operation
322 0); //copy number
323 //
324 // Calorimeter
325 //
326
327 solidCalor = new G4Box("Calorimeter", //its name
328 CalorThickness/2,CalorSizeYZ/2,CalorSizeYZ/2);//size
329
330 logicCalor = new G4LogicalVolume(solidCalor, //its solid
331 defaultMaterial, //its material
332 "Calorimeter"); //its name
333
334 physiCalor = new G4PVPlacement(0, //no rotation
335 G4ThreeVector(), //at (0,0,0)
336 logicCalor, //its logical volume
337 "Calorimeter", //its name
338 logicWorld, //its mother volume
339 false, //no boolean operation
340 0); //copy number
341
342 //
343 // Layers
344 //
345
346 solidLayer = new G4Box("Layer", //its name
347 LayerThickness/2,CalorSizeYZ/2,CalorSizeYZ/2); //size
348
349 logicLayer = new G4LogicalVolume(solidLayer, //its solid
350 defaultMaterial, //its material
351 "Layer"); //its name
352 if (NbOfLayers > 1)
353 physiLayer = new G4PVReplica("Layer", //its name
354 logicLayer, //its logical volume
355 logicCalor, //its mother
356 kXAxis, //axis of replication
357 NbOfLayers, //number of replica
358 LayerThickness); //witdth of replica
359 else
360 physiLayer = new G4PVPlacement(0, //no rotation
361 G4ThreeVector(), //at (0,0,0)
362 logicLayer, //its logical volume
363 "Layer", //its name
364 logicCalor, //its mother volume
365 false, //no boolean operation
366 0); //copy number
367
368 //
369 // Absorbers
370 //
371
372 G4double xfront = -0.5*LayerThickness;
373 for (G4int k=1; k<=NbOfAbsor; k++) {
374 solidAbsor[k] = new G4Box("Absorber", //its name
375 AbsorThickness[k]/2,CalorSizeYZ/2,CalorSizeYZ/2);
376
377 logicAbsor[k] = new G4LogicalVolume(solidAbsor[k], //its solid
378 AbsorMaterial[k], //its material
379 AbsorMaterial[k]->GetName());
380
381 G4double xcenter = xfront+0.5*AbsorThickness[k];
382 xfront += AbsorThickness[k];
383 physiAbsor[k] = new G4PVPlacement(0, //no rotation
384 G4ThreeVector(xcenter,0.,0.), //its position
385 logicAbsor[k], //its logical volume
386 AbsorMaterial[k]->GetName(), //its name
387 logicLayer, //its mother
388 false, //no boulean operat
389 k); //copy number
390
391 }
392
393
394 PrintCalorParameters();
395
396 //always return the physical World
397 //
398 return physiWorld;
399}
400
401//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
402
403void DetectorConstruction::PrintCalorParameters()
404{
405 G4cout << "\n-------------------------------------------------------------"
406 << "\n ---> The calorimeter is " << NbOfLayers << " layers of:";
407 for (G4int i=1; i<=NbOfAbsor; i++)
408 {
409 G4cout << "\n \t" << std::setw(12) << AbsorMaterial[i]->GetName() <<": "
410 << std::setw(6) << G4BestUnit(AbsorThickness[i],"Length");
411 }
412 G4cout << "\n-------------------------------------------------------------\n";
413
414 G4cout << "\n" << defaultMaterial << G4endl;
415 for (G4int j=1; j<=NbOfAbsor; j++)
416 G4cout << "\n" << AbsorMaterial[j] << G4endl;
417
418 G4cout << "\n-------------------------------------------------------------\n";
419}
420
421//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
422
423void DetectorConstruction::SetWorldMaterial(const G4String& material)
424{
425 // search the material by its name
426 G4Material* pttoMaterial =
427 G4NistManager::Instance()->FindOrBuildMaterial(material);
428 if (pttoMaterial) defaultMaterial = pttoMaterial;
429}
430
431//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
432
433void DetectorConstruction::SetNbOfLayers(G4int ival)
434{
435 // set the number of Layers
436 //
437 if (ival < 1)
438 { G4cout << "\n --->warning from SetNbOfLayers: "
439 << ival << " must be at least 1. Command refused" << G4endl;
440 return;
441 }
442 NbOfLayers = ival;
443}
444
445//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
446
447void DetectorConstruction::SetNbOfAbsor(G4int ival)
448{
449 // set the number of Absorbers
450 //
451 if (ival < 1 || ival > (MaxAbsor-1))
452 { G4cout << "\n ---> warning from SetNbOfAbsor: "
453 << ival << " must be at least 1 and and most " << MaxAbsor-1
454 << ". Command refused" << G4endl;
455 return;
456 }
457 NbOfAbsor = ival;
458}
459
460//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
461
462void DetectorConstruction::SetAbsorMaterial(G4int ival, const G4String& material)
463{
464 // search the material by its name
465 //
466 if (ival > NbOfAbsor || ival <= 0)
467 { G4cout << "\n --->warning from SetAbsorMaterial: absor number "
468 << ival << " out of range. Command refused" << G4endl;
469 return;
470 }
471
472 G4Material* pttoMaterial =
473 G4NistManager::Instance()->FindOrBuildMaterial(material);
474 if (pttoMaterial) AbsorMaterial[ival] = pttoMaterial;
475}
476
477//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
478
479void DetectorConstruction::SetAbsorThickness(G4int ival,G4double val)
480{
481 // change Absorber thickness
482 //
483 if (ival > NbOfAbsor || ival <= 0)
484 { G4cout << "\n --->warning from SetAbsorThickness: absor number "
485 << ival << " out of range. Command refused" << G4endl;
486 return;
487 }
488 if (val <= DBL_MIN)
489 { G4cout << "\n --->warning from SetAbsorThickness: thickness "
490 << val << " out of range. Command refused" << G4endl;
491 return;
492 }
493 AbsorThickness[ival] = val;
494}
495
496//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
497
498void DetectorConstruction::SetCalorSizeYZ(G4double val)
499{
500 // change the transverse size
501 //
502 if (val <= DBL_MIN)
503 { G4cout << "\n --->warning from SetCalorSizeYZ: thickness "
504 << val << " out of range. Command refused" << G4endl;
505 return;
506 }
507 CalorSizeYZ = val;
508}
509
510//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
511
512#include "G4FieldManager.hh"
513#include "G4TransportationManager.hh"
514
515void DetectorConstruction::SetMagField(G4double fieldValue)
516{
517 //apply a global uniform magnetic field along Z axis
518 //
519 G4FieldManager* fieldMgr
520 = G4TransportationManager::GetTransportationManager()->GetFieldManager();
521
522 if(magField) delete magField; //delete the existing magn field
523
524 if(fieldValue!=0.) // create a new one if non nul
525 { magField = new G4UniformMagField(G4ThreeVector(0.,0.,fieldValue));
526 fieldMgr->SetDetectorField(magField);
527 fieldMgr->CreateChordFinder(magField);
528 } else {
529 magField = 0;
530 fieldMgr->SetDetectorField(magField);
531 }
532}
533
534//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
535
536#include "G4RunManager.hh"
537
538void DetectorConstruction::UpdateGeometry()
539{
540 G4RunManager::GetRunManager()->DefineWorldVolume(ConstructCalorimeter());
541}
542
543//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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