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25 //
26 /// \file electromagnetic/TestEm0/src/RunAction.cc
27 /// \brief Implementation of the RunAction class
28 //
29 //
30 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
31 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
32
33 #include "RunAction.hh"
34
35 #include "DetectorConstruction.hh"
36 #include "PrimaryGeneratorAction.hh"
37
38 #include "G4Electron.hh"
39 #include "G4EmCalculator.hh"
40 #include "G4LossTableManager.hh"
41 #include "G4PhysicalConstants.hh"
42 #include "G4Positron.hh"
43 #include "G4ProcessManager.hh"
44 #include "G4Run.hh"
45 #include "G4SystemOfUnits.hh"
46 #include "G4UnitsTable.hh"
47
48 #include <vector>
49
50 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
51
52 RunAction::RunAction(DetectorConstruction* det, PrimaryGeneratorAction* kin)
53 : fDetector(det), fPrimary(kin)
54 {}
55 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
56
57 void RunAction::BeginOfRunAction(const G4Run*)
58 {
59 // set precision for printing
60 G4int prec = G4cout.precision(6);
61
62 // instanciate EmCalculator
63 G4EmCalculator emCal;
64 // emCal.SetVerbose(2);
65
66 // get particle
67 G4ParticleDefinition* particle = fPrimary->GetParticleGun()->GetParticleDefinition();
68 G4String partName = particle->GetParticleName();
69 G4double charge = particle->GetPDGCharge();
70 G4double energy = fPrimary->GetParticleGun()->GetParticleEnergy();
71
72 // get material
73 const G4Material* material = fDetector->GetMaterial();
74 G4String matName = material->GetName();
75 G4double density = material->GetDensity();
76 G4double radl = material->GetRadlen();
77
78 G4cout << "\n " << partName << " (" << G4BestUnit(energy, "Energy") << ") in "
79 << material->GetName() << " (density: " << G4BestUnit(density, "Volumic Mass")
80 << "; radiation length: " << G4BestUnit(radl, "Length") << ")" << G4endl;
81
82 // get cuts
83 GetCuts();
84 if (charge != 0.) {
85 G4cout << "\n Range cuts: \t gamma " << std::setw(12) << G4BestUnit(fRangeCut[0], "Length")
86 << "\t e- " << std::setw(12) << G4BestUnit(fRangeCut[1], "Length");
87 G4cout << "\n Energy cuts: \t gamma " << std::setw(12) << G4BestUnit(fEnergyCut[0], "Energy")
88 << "\t e- " << std::setw(12) << G4BestUnit(fEnergyCut[1], "Energy") << G4endl;
89 }
90
91 // max energy transfert
92 if (charge != 0.) {
93 G4double Mass_c2 = particle->GetPDGMass();
94 G4double moverM = electron_mass_c2 / Mass_c2;
95 G4double gamM1 = energy / Mass_c2, gam = gamM1 + 1., gamP1 = gam + 1.;
96 G4double Tmax = energy;
97 if (particle == G4Electron::Electron()) {
98 Tmax *= 0.5;
99 }
100 else if (particle != G4Positron::Positron()) {
101 Tmax = (2 * electron_mass_c2 * gamM1 * gamP1) / (1. + 2 * gam * moverM + moverM * moverM);
102 }
103 G4double range = emCal.GetCSDARange(Tmax, G4Electron::Electron(), material);
104
105 G4cout << "\n Max_energy _transferable : " << G4BestUnit(Tmax, "Energy") << " ("
106 << G4BestUnit(range, "Length") << ")" << G4endl;
107 }
108
109 // get processList and extract EM processes (but not MultipleScattering)
110 G4ProcessVector* plist = particle->GetProcessManager()->GetProcessList();
111 G4String procName;
112 G4double cut;
113 std::vector<G4String> emName;
114 std::vector<G4double> enerCut;
115 size_t length = plist->size();
116 for (size_t j = 0; j < length; j++) {
117 procName = (*plist)[j]->GetProcessName();
118 cut = fEnergyCut[1];
119 if ((procName == "eBrem") || (procName == "muBrems")) cut = fEnergyCut[0];
120 if (((*plist)[j]->GetProcessType() == fElectromagnetic) && (procName != "msc")) {
121 emName.push_back(procName);
122 enerCut.push_back(cut);
123 }
124 }
125
126 // write html documentation, if requested
127 char* htmlDocName = std::getenv("G4PhysListName"); // file name
128 char* htmlDocDir = std::getenv("G4PhysListDocDir"); // directory
129 if (htmlDocName && htmlDocDir) {
130 G4LossTableManager::Instance()->DumpHtml();
131 }
132
133 // print list of processes
134 G4cout << "\n processes : ";
135 for (size_t j = 0; j < emName.size(); ++j) {
136 G4cout << "\t" << std::setw(14) << emName[j] << "\t";
137 }
138 G4cout << "\t" << std::setw(14) << "total";
139
140 // compute cross section per atom (only for single material)
141 if (material->GetNumberOfElements() == 1) {
142 G4double Z = material->GetZ();
143 G4double A = material->GetA();
144
145 std::vector<G4double> sigma0;
146 G4double sig, sigtot = 0.;
147
148 for (size_t j = 0; j < emName.size(); j++) {
149 sig = emCal.ComputeCrossSectionPerAtom(energy, particle, emName[j], Z, A, enerCut[j]);
150 sigtot += sig;
151 sigma0.push_back(sig);
152 }
153 sigma0.push_back(sigtot);
154
155 G4cout << "\n \n cross section per atom : ";
156 for (size_t j = 0; j < sigma0.size(); ++j) {
157 G4cout << "\t" << std::setw(9) << G4BestUnit(sigma0[j], "Surface");
158 }
159 G4cout << G4endl;
160 }
161
162 // get cross section per volume
163 std::vector<G4double> sigma0;
164 std::vector<G4double> sigma1;
165 std::vector<G4double> sigma2;
166 G4double Sig, SigtotComp = 0., Sigtot = 0.;
167
168 for (size_t j = 0; j < emName.size(); ++j) {
169 Sig = emCal.ComputeCrossSectionPerVolume(energy, particle, emName[j], material, enerCut[j]);
170 SigtotComp += Sig;
171 sigma0.push_back(Sig);
172 Sig = emCal.GetCrossSectionPerVolume(energy, particle, emName[j], material);
173 Sigtot += Sig;
174 sigma1.push_back(Sig);
175 sigma2.push_back(Sig / density);
176 }
177 sigma0.push_back(SigtotComp);
178 sigma1.push_back(Sigtot);
179 sigma2.push_back(Sigtot / density);
180
181 // print cross sections
182 G4cout << "\n compCrossSectionPerVolume: ";
183 for (size_t j = 0; j < sigma0.size(); ++j) {
184 G4cout << "\t" << std::setw(9) << sigma0[j] * cm << " cm^-1\t";
185 }
186 G4cout << "\n cross section per volume : ";
187 for (size_t j = 0; j < sigma1.size(); ++j) {
188 G4cout << "\t" << std::setw(9) << sigma1[j] * cm << " cm^-1\t";
189 }
190
191 G4cout << "\n cross section per mass : ";
192 for (size_t j = 0; j < sigma2.size(); ++j) {
193 G4cout << "\t" << std::setw(9) << G4BestUnit(sigma2[j], "Surface/Mass");
194 }
195
196 // print mean free path
197
198 G4double lambda;
199
200 G4cout << "\n \n mean free path : ";
201 for (size_t j = 0; j < sigma1.size(); ++j) {
202 lambda = DBL_MAX;
203 if (sigma1[j] > 0.) lambda = 1 / sigma1[j];
204 G4cout << "\t" << std::setw(9) << G4BestUnit(lambda, "Length") << " ";
205 }
206
207 // mean free path (g/cm2)
208 G4cout << "\n (g/cm2) : ";
209 for (size_t j = 0; j < sigma2.size(); ++j) {
210 lambda = DBL_MAX;
211 if (sigma2[j] > 0.) lambda = 1 / sigma2[j];
212 G4cout << "\t" << std::setw(9) << G4BestUnit(lambda, "Mass/Surface");
213 }
214 G4cout << G4endl;
215
216 if (charge == 0.) {
217 G4cout.precision(prec);
218 G4cout << "\n-----------------------------------------------------------\n" << G4endl;
219 return;
220 }
221
222 // get stopping power
223 std::vector<G4double> dedx1;
224 std::vector<G4double> dedx2;
225 G4double dedx, dedxtot = 0.;
226 size_t nproc = emName.size();
227
228 for (size_t j = 0; j < nproc; ++j) {
229 dedx = emCal.ComputeDEDX(energy, particle, emName[j], material, enerCut[j]);
230 dedxtot += dedx;
231 dedx1.push_back(dedx);
232 dedx2.push_back(dedx / density);
233 }
234 dedx1.push_back(dedxtot);
235 dedx2.push_back(dedxtot / density);
236
237 // print stopping power
238 G4cout << "\n \n restricted dE/dx : ";
239 for (size_t j = 0; j <= nproc; ++j) {
240 G4cout << "\t" << std::setw(9) << G4BestUnit(dedx1[j], "Energy/Length");
241 }
242
243 G4cout << "\n (MeV/g/cm2) : ";
244 for (size_t j = 0; j <= nproc; ++j) {
245 G4cout << "\t" << std::setw(9) << G4BestUnit(dedx2[j], "Energy*Surface/Mass");
246 }
247 dedxtot = 0.;
248
249 for (size_t j = 0; j < nproc; ++j) {
250 dedx = emCal.ComputeDEDX(energy, particle, emName[j], material, energy);
251 dedxtot += dedx;
252 dedx1[j] = dedx;
253 dedx2[j] = dedx / density;
254 }
255 dedx1[nproc] = dedxtot;
256 dedx2[nproc] = dedxtot / density;
257
258 // print stopping power
259 G4cout << "\n \n unrestricted dE/dx : ";
260 for (size_t j = 0; j <= nproc; ++j) {
261 G4cout << "\t" << std::setw(9) << G4BestUnit(dedx1[j], "Energy/Length");
262 }
263
264 G4cout << "\n (MeV/g/cm2) : ";
265 for (size_t j = 0; j <= nproc; ++j) {
266 G4cout << "\t" << std::setw(9) << G4BestUnit(dedx2[j], "Energy*Surface/Mass");
267 }
268
269 // get range from restricted dedx
270 G4double range1 = emCal.GetRangeFromRestricteDEDX(energy, particle, material);
271 G4double range2 = range1 * density;
272
273 // print range
274 G4cout << "\n \n range from restrict dE/dx: "
275 << "\t" << std::setw(9) << G4BestUnit(range1, "Length") << " (" << std::setw(9)
276 << G4BestUnit(range2, "Mass/Surface") << ")";
277
278 // get range from full dedx
279 G4double EmaxTable = G4EmParameters::Instance()->MaxEnergyForCSDARange();
280 if (energy < EmaxTable) {
281 G4double Range1 = emCal.GetCSDARange(energy, particle, material);
282 G4double Range2 = Range1 * density;
283
284 G4cout << "\n range from full dE/dx : "
285 << "\t" << std::setw(9) << G4BestUnit(Range1, "Length") << " (" << std::setw(9)
286 << G4BestUnit(Range2, "Mass/Surface") << ")";
287 }
288
289 // get transport mean free path (for multiple scattering)
290 G4double MSmfp1 = emCal.GetMeanFreePath(energy, particle, "msc", material);
291 G4double MSmfp2 = MSmfp1 * density;
292
293 // print transport mean free path
294 G4cout << "\n \n transport mean free path : "
295 << "\t" << std::setw(9) << G4BestUnit(MSmfp1, "Length") << " (" << std::setw(9)
296 << G4BestUnit(MSmfp2, "Mass/Surface") << ")";
297
298 if (particle == G4Electron::Electron()) CriticalEnergy();
299
300 G4cout << "\n-------------------------------------------------------------\n";
301 G4cout << G4endl;
302
303 // reset default precision
304 G4cout.precision(prec);
305 }
306
307 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
308
309 void RunAction::EndOfRunAction(const G4Run*) {}
310
311 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
312
313 #include "G4ProductionCutsTable.hh"
314
315 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
316
317 void RunAction::GetCuts()
318 {
319 G4ProductionCutsTable* theCoupleTable = G4ProductionCutsTable::GetProductionCutsTable();
320
321 size_t numOfCouples = theCoupleTable->GetTableSize();
322 const G4MaterialCutsCouple* couple = 0;
323 G4int index = 0;
324 for (size_t i = 0; i < numOfCouples; i++) {
325 couple = theCoupleTable->GetMaterialCutsCouple(i);
326 if (couple->GetMaterial() == fDetector->GetMaterial()) {
327 index = i;
328 break;
329 }
330 }
331
332 fRangeCut[0] = (*(theCoupleTable->GetRangeCutsVector(idxG4GammaCut)))[index];
333 fRangeCut[1] = (*(theCoupleTable->GetRangeCutsVector(idxG4ElectronCut)))[index];
334 fRangeCut[2] = (*(theCoupleTable->GetRangeCutsVector(idxG4PositronCut)))[index];
335
336 fEnergyCut[0] = (*(theCoupleTable->GetEnergyCutsVector(idxG4GammaCut)))[index];
337 fEnergyCut[1] = (*(theCoupleTable->GetEnergyCutsVector(idxG4ElectronCut)))[index];
338 fEnergyCut[2] = (*(theCoupleTable->GetEnergyCutsVector(idxG4PositronCut)))[index];
339 }
340
341 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
342
343 void RunAction::CriticalEnergy()
344 {
345 // compute e- critical energy (Rossi definition) and Moliere radius.
346 // Review of Particle Physics - Eur. Phys. J. C3 (1998) page 147
347 //
348 G4EmCalculator emCal;
349
350 const G4Material* material = fDetector->GetMaterial();
351 const G4double radl = material->GetRadlen();
352 G4double ekin = 5 * MeV;
353 G4double deioni;
354 G4double err = 1., errmax = 0.001;
355 G4int iter = 0, itermax = 10;
356 while (err > errmax && iter < itermax) {
357 iter++;
358 deioni = radl * emCal.ComputeDEDX(ekin, G4Electron::Electron(), "eIoni", material);
359 err = std::abs(deioni - ekin) / ekin;
360 ekin = deioni;
361 }
362 G4cout << "\n \n critical energy (Rossi) : "
363 << "\t" << std::setw(8) << G4BestUnit(ekin, "Energy");
364
365 // Pdg formula (only for single material)
366 G4double pdga[2] = {610 * MeV, 710 * MeV};
367 G4double pdgb[2] = {1.24, 0.92};
368 G4double EcPdg = 0.;
369
370 if (material->GetNumberOfElements() == 1) {
371 G4int istat = 0;
372 if (material->GetState() == kStateGas) istat = 1;
373 G4double Zeff = material->GetZ() + pdgb[istat];
374 EcPdg = pdga[istat] / Zeff;
375 G4cout << "\t\t\t (from Pdg formula : " << std::setw(8) << G4BestUnit(EcPdg, "Energy") << ")";
376 }
377
378 const G4double Es = 21.2052 * MeV;
379 G4double rMolier1 = Es / ekin, rMolier2 = rMolier1 * radl;
380 G4cout << "\n Moliere radius : "
381 << "\t" << std::setw(8) << rMolier1 << " X0 "
382 << "= " << std::setw(8) << G4BestUnit(rMolier2, "Length");
383
384 if (material->GetNumberOfElements() == 1) {
385 G4double rMPdg = radl * Es / EcPdg;
386 G4cout << "\t (from Pdg formula : " << std::setw(8) << G4BestUnit(rMPdg, "Length") << ")";
387 }
388 }
389
390 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
391