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25 //
26 /// \file electromagnetic/TestEm5/src/DetectorConstruction.cc
27 /// \brief Implementation of the DetectorConstruction class
28 //
29 //
30 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
31 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
32
33 #include "DetectorConstruction.hh"
34
35 #include "DetectorMessenger.hh"
36
37 #include "G4AutoDelete.hh"
38 #include "G4Box.hh"
39 #include "G4GeometryManager.hh"
40 #include "G4GlobalMagFieldMessenger.hh"
41 #include "G4LogicalVolume.hh"
42 #include "G4LogicalVolumeStore.hh"
43 #include "G4Material.hh"
44 #include "G4NistManager.hh"
45 #include "G4PVPlacement.hh"
46 #include "G4PhysicalConstants.hh"
47 #include "G4PhysicalVolumeStore.hh"
48 #include "G4RunManager.hh"
49 #include "G4SolidStore.hh"
50 #include "G4SystemOfUnits.hh"
51 #include "G4UniformMagField.hh"
52 #include "G4UnitsTable.hh"
53
54 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
55
56 DetectorConstruction::DetectorConstruction()
57 {
58 // default parameter values of the calorimeter
59 fAbsorberThickness = 1. * cm;
60 fAbsorberSizeYZ = 2. * cm;
61 fXposAbs = 0. * cm;
62 ComputeGeomParameters();
63
64 // materials
65 DefineMaterials();
66 SetWorldMaterial("G4_Galactic");
67 SetAbsorberMaterial("G4_Si");
68
69 // create commands for interactive definition of the calorimeter
70 fDetectorMessenger = new DetectorMessenger(this);
71 }
72
73 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
74
75 DetectorConstruction::~DetectorConstruction()
76 {
77 delete fDetectorMessenger;
78 }
79
80 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
81
82 void DetectorConstruction::DefineMaterials()
83 {
84 // This function illustrates the possible ways to define materials
85
86 G4String symbol; // a=mass of a mole;
87 G4double a, z, density; // z=mean number of protons;
88
89 G4int ncomponents, natoms;
90 G4double fractionmass;
91 G4double temperature, pressure;
92
93 //
94 // define Elements
95 //
96
97 G4Element* H = new G4Element("Hydrogen", symbol = "H", z = 1, a = 1.01 * g / mole);
98 G4Element* C = new G4Element("Carbon", symbol = "C", z = 6, a = 12.01 * g / mole);
99 G4Element* N = new G4Element("Nitrogen", symbol = "N", z = 7, a = 14.01 * g / mole);
100 G4Element* O = new G4Element("Oxygen", symbol = "O", z = 8, a = 16.00 * g / mole);
101 G4Element* Na = new G4Element("Sodium", symbol = "Na", z = 11, a = 22.99 * g / mole);
102 G4Element* Ar = new G4Element("Argon", symbol = "Ar", z = 18, a = 39.95 * g / mole);
103 G4Element* I = new G4Element("Iodine", symbol = "I", z = 53, a = 126.90 * g / mole);
104 G4Element* Xe = new G4Element("Xenon", symbol = "Xe", z = 54, a = 131.29 * g / mole);
105
106 //
107 // define simple materials
108 //
109
110 new G4Material("H2Liq", z = 1, a = 1.01 * g / mole, density = 70.8 * mg / cm3);
111 new G4Material("Beryllium", z = 4, a = 9.01 * g / mole, density = 1.848 * g / cm3);
112 new G4Material("Aluminium", z = 13, a = 26.98 * g / mole, density = 2.700 * g / cm3);
113 new G4Material("Silicon", z = 14, a = 28.09 * g / mole, density = 2.330 * g / cm3);
114
115 G4Material* lAr = new G4Material("liquidArgon", density = 1.390 * g / cm3, ncomponents = 1);
116 lAr->AddElement(Ar, natoms = 1);
117
118 new G4Material("Iron", z = 26, a = 55.85 * g / mole, density = 7.870 * g / cm3);
119 new G4Material("Copper", z = 29, a = 63.55 * g / mole, density = 8.960 * g / cm3);
120 new G4Material("Germanium", z = 32, a = 72.61 * g / mole, density = 5.323 * g / cm3);
121 new G4Material("Silver", z = 47, a = 107.87 * g / mole, density = 10.50 * g / cm3);
122 new G4Material("Tungsten", z = 74, a = 183.85 * g / mole, density = 19.30 * g / cm3);
123 new G4Material("Gold", z = 79, a = 196.97 * g / mole, density = 19.32 * g / cm3);
124 new G4Material("Lead", z = 82, a = 207.19 * g / mole, density = 11.35 * g / cm3);
125
126 //
127 // define a material from elements. case 1: chemical molecule
128 //
129
130 G4Material* H2O = new G4Material("Water", density = 1.000 * g / cm3, ncomponents = 2);
131 H2O->AddElement(H, natoms = 2);
132 H2O->AddElement(O, natoms = 1);
133 H2O->GetIonisation()->SetMeanExcitationEnergy(78 * eV);
134
135 G4Material* CH = new G4Material("Plastic", density = 1.04 * g / cm3, ncomponents = 2);
136 CH->AddElement(C, natoms = 1);
137 CH->AddElement(H, natoms = 1);
138
139 G4Material* NaI = new G4Material("NaI", density = 3.67 * g / cm3, ncomponents = 2);
140 NaI->AddElement(Na, natoms = 1);
141 NaI->AddElement(I, natoms = 1);
142 NaI->GetIonisation()->SetMeanExcitationEnergy(452 * eV);
143
144 //
145 // define a material from elements. case 2: mixture by fractional mass
146 //
147
148 G4Material* Air = new G4Material("Air", density = 1.290 * mg / cm3, ncomponents = 2);
149 Air->AddElement(N, fractionmass = 0.7);
150 Air->AddElement(O, fractionmass = 0.3);
151
152 G4Material* Air20 = new G4Material("Air20", density = 1.205 * mg / cm3, ncomponents = 2,
153 kStateGas, 293. * kelvin, 1. * atmosphere);
154 Air20->AddElement(N, fractionmass = 0.7);
155 Air20->AddElement(O, fractionmass = 0.3);
156
157 // Graphite
158 //
159 G4Material* Graphite = new G4Material("Graphite", density = 1.7 * g / cm3, ncomponents = 1);
160 Graphite->AddElement(C, fractionmass = 1.);
161
162 // Havar
163 //
164 G4Element* Cr = new G4Element("Chrome", "Cr", z = 24, a = 51.996 * g / mole);
165 G4Element* Fe = new G4Element("Iron", "Fe", z = 26, a = 55.845 * g / mole);
166 G4Element* Co = new G4Element("Cobalt", "Co", z = 27, a = 58.933 * g / mole);
167 G4Element* Ni = new G4Element("Nickel", "Ni", z = 28, a = 58.693 * g / mole);
168 G4Element* W = new G4Element("Tungsten", "W", z = 74, a = 183.850 * g / mole);
169
170 G4Material* Havar = new G4Material("Havar", density = 8.3 * g / cm3, ncomponents = 5);
171 Havar->AddElement(Cr, fractionmass = 0.1785);
172 Havar->AddElement(Fe, fractionmass = 0.1822);
173 Havar->AddElement(Co, fractionmass = 0.4452);
174 Havar->AddElement(Ni, fractionmass = 0.1310);
175 Havar->AddElement(W, fractionmass = 0.0631);
176
177 //
178 // examples of gas
179 //
180 new G4Material("ArgonGas", z = 18, a = 39.948 * g / mole, density = 1.782 * mg / cm3, kStateGas,
181 273.15 * kelvin, 1 * atmosphere);
182
183 new G4Material("XenonGas", z = 54, a = 131.29 * g / mole, density = 5.458 * mg / cm3, kStateGas,
184 293.15 * kelvin, 1 * atmosphere);
185
186 G4Material* CO2 = new G4Material("CarbonicGas", density = 1.977 * mg / cm3, ncomponents = 2);
187 CO2->AddElement(C, natoms = 1);
188 CO2->AddElement(O, natoms = 2);
189
190 G4Material* ArCO2 = new G4Material("ArgonCO2", density = 1.8223 * mg / cm3, ncomponents = 2);
191 ArCO2->AddElement(Ar, fractionmass = 0.7844);
192 ArCO2->AddMaterial(CO2, fractionmass = 0.2156);
193
194 // another way to define mixture of gas per volume
195 G4Material* NewArCO2 =
196 new G4Material("NewArgonCO2", density = 1.8223 * mg / cm3, ncomponents = 3);
197 NewArCO2->AddElement(Ar, natoms = 8);
198 NewArCO2->AddElement(C, natoms = 2);
199 NewArCO2->AddElement(O, natoms = 4);
200
201 G4Material* ArCH4 = new G4Material("ArgonCH4", density = 1.709 * mg / cm3, ncomponents = 3);
202 ArCH4->AddElement(Ar, natoms = 93);
203 ArCH4->AddElement(C, natoms = 7);
204 ArCH4->AddElement(H, natoms = 28);
205
206 G4Material* XeCH = new G4Material("XenonMethanePropane", density = 4.9196 * mg / cm3,
207 ncomponents = 3, kStateGas, 293.15 * kelvin, 1 * atmosphere);
208 XeCH->AddElement(Xe, natoms = 875);
209 XeCH->AddElement(C, natoms = 225);
210 XeCH->AddElement(H, natoms = 700);
211
212 G4Material* steam = new G4Material("WaterSteam", density = 1.0 * mg / cm3, ncomponents = 1);
213 steam->AddMaterial(H2O, fractionmass = 1.);
214 steam->GetIonisation()->SetMeanExcitationEnergy(71.6 * eV);
215
216 G4Material* rock1 = new G4Material("StandardRock", 2.65 * CLHEP::g / CLHEP::cm3, 1, kStateSolid);
217 rock1->AddElement(Na, 1);
218
219 //
220 // example of vacuum
221 //
222 density = universe_mean_density; // from PhysicalConstants.h
223 pressure = 3.e-18 * pascal;
224 temperature = 2.73 * kelvin;
225 new G4Material("Galactic", z = 1, a = 1.01 * g / mole, density, kStateGas, temperature, pressure);
226 }
227
228 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
229
230 void DetectorConstruction::ComputeGeomParameters()
231 {
232 // Compute derived parameters of the calorimeter
233 fXstartAbs = fXposAbs - 0.5 * fAbsorberThickness;
234 fXendAbs = fXposAbs + 0.5 * fAbsorberThickness;
235
236 G4double xmax = std::max(std::abs(fXstartAbs), std::abs(fXendAbs));
237 fWorldSizeX = 2.4 * xmax;
238 fWorldSizeYZ = 1.2 * fAbsorberSizeYZ;
239 if (nullptr != fPhysiWorld) {
240 ChangeGeometry();
241 }
242 }
243
244 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
245
246 G4VPhysicalVolume* DetectorConstruction::Construct()
247 {
248 if (nullptr != fPhysiWorld) {
249 return fPhysiWorld;
250 }
251 // World
252 //
253 fSolidWorld = new G4Box("World", // its name
254 fWorldSizeX / 2, fWorldSizeYZ / 2, fWorldSizeYZ / 2); // its size
255
256 fLogicWorld = new G4LogicalVolume(fSolidWorld, // its solid
257 fWorldMaterial, // its material
258 "World"); // its name
259
260 fPhysiWorld = new G4PVPlacement(0, // no rotation
261 G4ThreeVector(0., 0., 0.), // at (0,0,0)
262 fLogicWorld, // its logical volume
263 "World", // its name
264 0, // its mother volume
265 false, // no boolean operation
266 0); // copy number
267
268 // Absorber
269 //
270 fSolidAbsorber =
271 new G4Box("Absorber", fAbsorberThickness / 2, fAbsorberSizeYZ / 2, fAbsorberSizeYZ / 2);
272
273 fLogicAbsorber = new G4LogicalVolume(fSolidAbsorber, // its solid
274 fAbsorberMaterial, // its material
275 "Absorber"); // its name
276
277 fPhysiAbsorber = new G4PVPlacement(0, // no rotation
278 G4ThreeVector(fXposAbs, 0., 0.), // its position
279 fLogicAbsorber, // its logical volume
280 "Absorber", // its name
281 fLogicWorld, // its mother
282 false, // no boulean operat
283 0); // copy number
284
285 PrintGeomParameters();
286
287 // always return the physical World
288 //
289 return fPhysiWorld;
290 }
291
292 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
293
294 void DetectorConstruction::PrintGeomParameters()
295 {
296 G4cout << "\n" << fWorldMaterial << G4endl;
297 G4cout << "\n" << fAbsorberMaterial << G4endl;
298
299 G4cout << "\n The WORLD is made of " << G4BestUnit(fWorldSizeX, "Length") << " of "
300 << fWorldMaterial->GetName();
301 G4cout << ". The transverse size (YZ) of the world is " << G4BestUnit(fWorldSizeYZ, "Length")
302 << G4endl;
303 G4cout << " The ABSORBER is made of " << G4BestUnit(fAbsorberThickness, "Length") << " of "
304 << fAbsorberMaterial->GetName();
305 G4cout << ". The transverse size (YZ) is " << G4BestUnit(fAbsorberSizeYZ, "Length") << G4endl;
306 G4cout << " X position of the middle of the absorber " << G4BestUnit(fXposAbs, "Length");
307 G4cout << G4endl;
308 }
309
310 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
311
312 void DetectorConstruction::SetAbsorberMaterial(const G4String& materialChoice)
313 {
314 // search the material by its name
315 G4Material* pttoMaterial = G4NistManager::Instance()->FindOrBuildMaterial(materialChoice);
316
317 if (pttoMaterial && fAbsorberMaterial != pttoMaterial) {
318 fAbsorberMaterial = pttoMaterial;
319 if (fLogicAbsorber) {
320 fLogicAbsorber->SetMaterial(fAbsorberMaterial);
321 }
322 G4RunManager::GetRunManager()->PhysicsHasBeenModified();
323 }
324 }
325
326 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
327
328 void DetectorConstruction::SetWorldMaterial(const G4String& materialChoice)
329 {
330 // search the material by its name
331 G4Material* pttoMaterial = G4NistManager::Instance()->FindOrBuildMaterial(materialChoice);
332
333 if (pttoMaterial && fWorldMaterial != pttoMaterial) {
334 fWorldMaterial = pttoMaterial;
335 if (fLogicWorld) {
336 fLogicWorld->SetMaterial(fWorldMaterial);
337 }
338 G4RunManager::GetRunManager()->PhysicsHasBeenModified();
339 }
340 }
341
342 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
343
344 void DetectorConstruction::SetAbsorberThickness(G4double val)
345 {
346 fAbsorberThickness = val;
347 ComputeGeomParameters();
348 }
349
350 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
351
352 void DetectorConstruction::SetAbsorberSizeYZ(G4double val)
353 {
354 fAbsorberSizeYZ = val;
355 ComputeGeomParameters();
356 }
357
358 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
359
360 void DetectorConstruction::SetWorldSizeX(G4double val)
361 {
362 fWorldSizeX = val;
363 ComputeGeomParameters();
364 }
365
366 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
367
368 void DetectorConstruction::SetWorldSizeYZ(G4double val)
369 {
370 fWorldSizeYZ = val;
371 ComputeGeomParameters();
372 }
373
374 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
375
376 void DetectorConstruction::SetAbsorberXpos(G4double val)
377 {
378 fXposAbs = val;
379 ComputeGeomParameters();
380 }
381
382 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.....
383
384 void DetectorConstruction::ConstructSDandField()
385 {
386 if (fFieldMessenger.Get() == 0) {
387 // Create global magnetic field messenger.
388 // Uniform magnetic field is then created automatically if
389 // the field value is not zero.
390 G4ThreeVector fieldValue = G4ThreeVector();
391 G4GlobalMagFieldMessenger* msg = new G4GlobalMagFieldMessenger(fieldValue);
392 // msg->SetVerboseLevel(1);
393 G4AutoDelete::Register(msg);
394 fFieldMessenger.Put(msg);
395 }
396 }
397
398 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
399
400 void DetectorConstruction::ChangeGeometry()
401 {
402 fSolidWorld->SetXHalfLength(fWorldSizeX * 0.5);
403 fSolidWorld->SetYHalfLength(fWorldSizeYZ * 0.5);
404 fSolidWorld->SetZHalfLength(fWorldSizeYZ * 0.5);
405
406 fSolidAbsorber->SetXHalfLength(fAbsorberThickness * 0.5);
407 fSolidAbsorber->SetYHalfLength(fAbsorberSizeYZ * 0.5);
408 fSolidAbsorber->SetZHalfLength(fAbsorberSizeYZ * 0.5);
409 }
410
411 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
412