1 | // |
---|
2 | // ******************************************************************** |
---|
3 | // * License and Disclaimer * |
---|
4 | // * * |
---|
5 | // * The Geant4 software is copyright of the Copyright Holders of * |
---|
6 | // * the Geant4 Collaboration. It is provided under the terms and * |
---|
7 | // * conditions of the Geant4 Software License, included in the file * |
---|
8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
---|
9 | // * include a list of copyright holders. * |
---|
10 | // * * |
---|
11 | // * Neither the authors of this software system, nor their employing * |
---|
12 | // * institutes,nor the agencies providing financial support for this * |
---|
13 | // * work make any representation or warranty, express or implied, * |
---|
14 | // * regarding this software system or assume any liability for its * |
---|
15 | // * use. Please see the license in the file LICENSE and URL above * |
---|
16 | // * for the full disclaimer and the limitation of liability. * |
---|
17 | // * * |
---|
18 | // * This code implementation is the result of the scientific and * |
---|
19 | // * technical work of the GEANT4 collaboration. * |
---|
20 | // * By using, copying, modifying or distributing the software (or * |
---|
21 | // * any work based on the software) you agree to acknowledge its * |
---|
22 | // * use in resulting scientific publications, and indicate your * |
---|
23 | // * acceptance of all terms of the Geant4 Software license. * |
---|
24 | // ******************************************************************** |
---|
25 | // |
---|
26 | // $Id: G4PenelopeBremsstrahlung.cc,v 1.18 2006/06/29 19:40:35 gunter Exp $ |
---|
27 | // GEANT4 tag $Name: $ |
---|
28 | // |
---|
29 | // -------------------------------------------------------------- |
---|
30 | // |
---|
31 | // File name: G4PenelopeBremsstrahlung |
---|
32 | // |
---|
33 | // Author: Luciano Pandola |
---|
34 | // |
---|
35 | // Creation date: February 2003 |
---|
36 | // |
---|
37 | // Modifications: |
---|
38 | // 24.04.2003 V.Ivanchenko - Cut per region mfpt |
---|
39 | // 20.05.2003 MGP - Removed compilation warnings |
---|
40 | // Restored NotForced in GetMeanFreePath |
---|
41 | // 23.05.2003 MGP - Removed memory leak (fix in destructor) |
---|
42 | // 07.11.2003 L.Pandola - Bug fixed in LoadAngularData() |
---|
43 | // 11.11.2003 L.Pandola - Code review: use std::map for angular data |
---|
44 | // 01.06.2004 L.Pandola - StopButAlive for positrons on PostStepDoIt |
---|
45 | // |
---|
46 | //---------------------------------------------------------------- |
---|
47 | |
---|
48 | #include "G4PenelopeBremsstrahlung.hh" |
---|
49 | #include "G4PenelopeBremsstrahlungContinuous.hh" |
---|
50 | #include "G4eBremsstrahlungSpectrum.hh" |
---|
51 | #include "G4BremsstrahlungCrossSectionHandler.hh" |
---|
52 | #include "G4VDataSetAlgorithm.hh" |
---|
53 | #include "G4LogLogInterpolation.hh" |
---|
54 | #include "G4VEMDataSet.hh" |
---|
55 | #include "G4EnergyLossTables.hh" |
---|
56 | #include "G4UnitsTable.hh" |
---|
57 | #include "G4Electron.hh" |
---|
58 | #include "G4Gamma.hh" |
---|
59 | #include "G4MaterialCutsCouple.hh" |
---|
60 | #include "G4DataVector.hh" |
---|
61 | #include "G4ProductionCutsTable.hh" |
---|
62 | #include "G4ProcessManager.hh" |
---|
63 | |
---|
64 | G4PenelopeBremsstrahlung::G4PenelopeBremsstrahlung(const G4String& nam) |
---|
65 | : G4eLowEnergyLoss(nam), |
---|
66 | crossSectionHandler(0), |
---|
67 | theMeanFreePath(0), |
---|
68 | energySpectrum(0) |
---|
69 | { |
---|
70 | angularData = new std::map<G4int,G4PenelopeBremsstrahlungAngular*>; |
---|
71 | cutForPhotons = 0.; |
---|
72 | verboseLevel = 0; |
---|
73 | } |
---|
74 | |
---|
75 | |
---|
76 | G4PenelopeBremsstrahlung::~G4PenelopeBremsstrahlung() |
---|
77 | { |
---|
78 | delete crossSectionHandler; |
---|
79 | delete energySpectrum; |
---|
80 | delete theMeanFreePath; |
---|
81 | for (G4int Z=1;Z<100;Z++){ |
---|
82 | if (angularData->count(Z)) delete (angularData->find(Z)->second); |
---|
83 | } |
---|
84 | delete angularData; |
---|
85 | } |
---|
86 | |
---|
87 | |
---|
88 | void G4PenelopeBremsstrahlung::BuildPhysicsTable(const G4ParticleDefinition& aParticleType) |
---|
89 | { |
---|
90 | if(verboseLevel > 0) { |
---|
91 | G4cout << "G4PenelopeBremsstrahlung::BuildPhysicsTable start" |
---|
92 | << G4endl; |
---|
93 | } |
---|
94 | |
---|
95 | cutForSecondaryPhotons.clear(); |
---|
96 | LoadAngularData(); |
---|
97 | if(verboseLevel > 0) { |
---|
98 | G4cout << "G4PenelopeBremsstrahlung: Angular data loaded" << G4endl; |
---|
99 | } |
---|
100 | // Create and fill BremsstrahlungParameters once |
---|
101 | if ( energySpectrum != 0 ) delete energySpectrum; |
---|
102 | //grid of reduced energy bins for photons |
---|
103 | |
---|
104 | G4DataVector eBins; |
---|
105 | |
---|
106 | eBins.push_back(1.0e-12); |
---|
107 | eBins.push_back(0.05); |
---|
108 | eBins.push_back(0.075); |
---|
109 | eBins.push_back(0.1); |
---|
110 | eBins.push_back(0.125); |
---|
111 | eBins.push_back(0.15); |
---|
112 | eBins.push_back(0.2); |
---|
113 | eBins.push_back(0.25); |
---|
114 | eBins.push_back(0.3); |
---|
115 | eBins.push_back(0.35); |
---|
116 | eBins.push_back(0.40); |
---|
117 | eBins.push_back(0.45); |
---|
118 | eBins.push_back(0.50); |
---|
119 | eBins.push_back(0.55); |
---|
120 | eBins.push_back(0.60); |
---|
121 | eBins.push_back(0.65); |
---|
122 | eBins.push_back(0.70); |
---|
123 | eBins.push_back(0.75); |
---|
124 | eBins.push_back(0.80); |
---|
125 | eBins.push_back(0.85); |
---|
126 | eBins.push_back(0.90); |
---|
127 | eBins.push_back(0.925); |
---|
128 | eBins.push_back(0.95); |
---|
129 | eBins.push_back(0.97); |
---|
130 | eBins.push_back(0.99); |
---|
131 | eBins.push_back(0.995); |
---|
132 | eBins.push_back(0.999); |
---|
133 | eBins.push_back(0.9995); |
---|
134 | eBins.push_back(0.9999); |
---|
135 | eBins.push_back(0.99995); |
---|
136 | eBins.push_back(0.99999); |
---|
137 | eBins.push_back(1.0); |
---|
138 | |
---|
139 | |
---|
140 | const G4String dataName("/penelope/br-sp-pen.dat"); |
---|
141 | energySpectrum = new G4eBremsstrahlungSpectrum(eBins,dataName); |
---|
142 | |
---|
143 | //the shape of the energy spectrum for positron is the same used for the electrons, |
---|
144 | //as the differential cross section is scaled of a factor f(E,Z) which is independent |
---|
145 | //on the energy of the gamma |
---|
146 | |
---|
147 | if(verboseLevel > 0) { |
---|
148 | G4cout << "G4PenelopeBremsstrahlungSpectrum is initialized" |
---|
149 | << G4endl; |
---|
150 | } |
---|
151 | |
---|
152 | // Create and fill G4CrossSectionHandler once |
---|
153 | |
---|
154 | if( crossSectionHandler != 0 ) delete crossSectionHandler; |
---|
155 | G4VDataSetAlgorithm* interpolation = new G4LogLogInterpolation(); |
---|
156 | G4double lowKineticEnergy = GetLowerBoundEloss(); |
---|
157 | G4double highKineticEnergy = GetUpperBoundEloss(); |
---|
158 | G4int totBin = GetNbinEloss(); |
---|
159 | crossSectionHandler = new G4BremsstrahlungCrossSectionHandler(energySpectrum, interpolation); |
---|
160 | crossSectionHandler->Initialise(0,lowKineticEnergy, highKineticEnergy, totBin); |
---|
161 | if (&aParticleType==G4Electron::Electron()) |
---|
162 | { |
---|
163 | crossSectionHandler->LoadShellData("brem/br-cs-"); |
---|
164 | } |
---|
165 | else |
---|
166 | { |
---|
167 | crossSectionHandler->LoadShellData("penelope/br-cs-pos-"); //cross section for positrons |
---|
168 | } |
---|
169 | |
---|
170 | if (verboseLevel > 0) { |
---|
171 | G4cout << GetProcessName() |
---|
172 | << " is created; Cross section data: " |
---|
173 | << G4endl; |
---|
174 | crossSectionHandler->PrintData(); |
---|
175 | G4cout << "Parameters: " |
---|
176 | << G4endl; |
---|
177 | energySpectrum->PrintData(); |
---|
178 | } |
---|
179 | |
---|
180 | // Build loss table for Bremsstrahlung |
---|
181 | |
---|
182 | BuildLossTable(aParticleType); |
---|
183 | |
---|
184 | if(verboseLevel > 0) { |
---|
185 | G4cout << "The loss table is built" |
---|
186 | << G4endl; |
---|
187 | } |
---|
188 | |
---|
189 | if (&aParticleType==G4Electron::Electron()) { |
---|
190 | |
---|
191 | RecorderOfElectronProcess[CounterOfElectronProcess] = (*this).theLossTable; |
---|
192 | CounterOfElectronProcess++; |
---|
193 | PrintInfoDefinition(); |
---|
194 | |
---|
195 | } else { |
---|
196 | |
---|
197 | RecorderOfPositronProcess[CounterOfPositronProcess] = (*this).theLossTable; |
---|
198 | CounterOfPositronProcess++; |
---|
199 | } |
---|
200 | // Build mean free path data using cut values |
---|
201 | |
---|
202 | if( theMeanFreePath != 0 ) delete theMeanFreePath; |
---|
203 | theMeanFreePath = crossSectionHandler-> |
---|
204 | BuildMeanFreePathForMaterials(&cutForSecondaryPhotons); |
---|
205 | |
---|
206 | if(verboseLevel > 0) { |
---|
207 | G4cout << "The MeanFreePath table is built" |
---|
208 | << G4endl; |
---|
209 | } |
---|
210 | |
---|
211 | // Build common DEDX table for all ionisation processes |
---|
212 | |
---|
213 | BuildDEDXTable(aParticleType); |
---|
214 | |
---|
215 | if(verboseLevel > 0) { |
---|
216 | G4cout << "G4PenelopeBremsstrahlung::BuildPhysicsTable end" |
---|
217 | << G4endl; |
---|
218 | } |
---|
219 | } |
---|
220 | |
---|
221 | |
---|
222 | void G4PenelopeBremsstrahlung::BuildLossTable(const G4ParticleDefinition& aParticleType) |
---|
223 | { |
---|
224 | // Build table for energy loss due to soft brems |
---|
225 | // the tables are built for *MATERIALS* binning is taken from LowEnergyLoss |
---|
226 | G4double lowKineticEnergy = GetLowerBoundEloss(); |
---|
227 | G4double highKineticEnergy = GetUpperBoundEloss(); |
---|
228 | size_t totBin = GetNbinEloss(); |
---|
229 | |
---|
230 | // create table |
---|
231 | |
---|
232 | if (theLossTable) { |
---|
233 | theLossTable->clearAndDestroy(); |
---|
234 | delete theLossTable; |
---|
235 | } |
---|
236 | |
---|
237 | const G4ProductionCutsTable* theCoupleTable= |
---|
238 | G4ProductionCutsTable::GetProductionCutsTable(); |
---|
239 | size_t numOfCouples = theCoupleTable->GetTableSize(); |
---|
240 | theLossTable = new G4PhysicsTable(numOfCouples); |
---|
241 | |
---|
242 | |
---|
243 | // Clean up the vector of cuts |
---|
244 | cutForSecondaryPhotons.clear(); |
---|
245 | |
---|
246 | // Loop for materials |
---|
247 | for (size_t j=0; j<numOfCouples; j++) { |
---|
248 | |
---|
249 | // create physics vector and fill it |
---|
250 | G4PhysicsLogVector* aVector = new G4PhysicsLogVector(lowKineticEnergy, |
---|
251 | highKineticEnergy, |
---|
252 | totBin); |
---|
253 | |
---|
254 | // get material parameters needed for the energy loss calculation |
---|
255 | const G4MaterialCutsCouple* couple = theCoupleTable->GetMaterialCutsCouple(j); |
---|
256 | const G4Material* material= couple->GetMaterial(); |
---|
257 | // the cut cannot be below lowest limit |
---|
258 | G4double tCut = (*(theCoupleTable->GetEnergyCutsVector(0)))[j]; |
---|
259 | tCut = std::min(highKineticEnergy, tCut); |
---|
260 | cutForSecondaryPhotons.push_back(tCut); |
---|
261 | |
---|
262 | const G4ElementVector* theElementVector = material->GetElementVector(); |
---|
263 | size_t NumberOfElements = material->GetNumberOfElements() ; |
---|
264 | const G4double* theAtomicNumDensityVector = |
---|
265 | material->GetAtomicNumDensityVector(); |
---|
266 | if(verboseLevel > 1) { |
---|
267 | G4cout << "Energy loss for material # " << j |
---|
268 | << " tCut(keV)= " << tCut/keV |
---|
269 | << G4endl; |
---|
270 | } |
---|
271 | |
---|
272 | G4DataVector* ionloss = new G4DataVector(); |
---|
273 | for (size_t i = 0; i<totBin; i++) { |
---|
274 | ionloss->push_back(0.0); |
---|
275 | } |
---|
276 | |
---|
277 | const G4String partName = aParticleType.GetParticleName(); |
---|
278 | // loop for elements in the material |
---|
279 | for (size_t iel=0; iel<NumberOfElements; iel++ ) { |
---|
280 | G4int Z = (G4int)((*theElementVector)[iel]->GetZ()); |
---|
281 | G4PenelopeBremsstrahlungContinuous* ContLoss = new G4PenelopeBremsstrahlungContinuous(Z,tCut,GetLowerBoundEloss(), |
---|
282 | GetUpperBoundEloss(), |
---|
283 | partName); |
---|
284 | // the initialization must be repeated for each Z |
---|
285 | // now comes the loop for the kinetic energy values |
---|
286 | for (size_t k = 0; k<totBin; k++) { |
---|
287 | G4double lowEdgeEnergy = aVector->GetLowEdgeEnergy(k); |
---|
288 | // method for calcutation of continuous loss |
---|
289 | (*ionloss)[k] += ContLoss->CalculateStopping(lowEdgeEnergy) * theAtomicNumDensityVector[iel]; |
---|
290 | //va chiamato una volta per ogni energia |
---|
291 | //per ogni energia k, somma su tutti gli elementi del materiale |
---|
292 | } |
---|
293 | delete ContLoss; |
---|
294 | } |
---|
295 | |
---|
296 | for (size_t ibin = 0; ibin<totBin; ibin++) { |
---|
297 | aVector->PutValue(ibin,(*ionloss)[ibin]); //un valore per ogni energia (somma sugli elementi del mate) |
---|
298 | } |
---|
299 | delete ionloss; |
---|
300 | theLossTable->insert(aVector); |
---|
301 | } |
---|
302 | } |
---|
303 | |
---|
304 | |
---|
305 | G4VParticleChange* G4PenelopeBremsstrahlung::PostStepDoIt(const G4Track& track, |
---|
306 | const G4Step& step) |
---|
307 | { |
---|
308 | aParticleChange.Initialize(track); |
---|
309 | |
---|
310 | const G4MaterialCutsCouple* couple = track.GetMaterialCutsCouple(); |
---|
311 | const G4Material* material = couple->GetMaterial(); |
---|
312 | G4double kineticEnergy = track.GetKineticEnergy(); |
---|
313 | G4int index = couple->GetIndex(); |
---|
314 | G4double tCut = cutForSecondaryPhotons[index]; |
---|
315 | |
---|
316 | // Control limits |
---|
317 | if(tCut >= kineticEnergy) |
---|
318 | return G4VContinuousDiscreteProcess::PostStepDoIt(track, step); |
---|
319 | |
---|
320 | G4int Z = crossSectionHandler->SelectRandomAtom(couple, kineticEnergy); |
---|
321 | G4double tGamma = energySpectrum->SampleEnergy(Z, tCut, kineticEnergy, kineticEnergy); |
---|
322 | //Check if the Z has been inserted in the map |
---|
323 | if (!(angularData->count(Z))) { |
---|
324 | G4String excep = "Not found the angular data for material " + material->GetName(); |
---|
325 | G4Exception(excep); |
---|
326 | } |
---|
327 | |
---|
328 | //Check if the loaded angular data are right |
---|
329 | //G4cout << "Material Z: " << angularData->find(Z)->second->GetAtomicNumber() << " !!" << G4endl; |
---|
330 | |
---|
331 | // Sample gamma angle (Z - axis along the parent particle). |
---|
332 | G4double dirZ = angularData->find(Z)->second->ExtractCosTheta(kineticEnergy,tGamma); |
---|
333 | G4double totalEnergy = kineticEnergy + electron_mass_c2; |
---|
334 | G4double phi = twopi * G4UniformRand(); |
---|
335 | G4double sinTheta = std::sqrt(1. - dirZ*dirZ); |
---|
336 | G4double dirX = sinTheta*std::cos(phi); |
---|
337 | G4double dirY = sinTheta*std::sin(phi); |
---|
338 | |
---|
339 | G4ThreeVector gammaDirection (dirX, dirY, dirZ); |
---|
340 | G4ThreeVector electronDirection = track.GetMomentumDirection(); |
---|
341 | |
---|
342 | gammaDirection.rotateUz(electronDirection); |
---|
343 | |
---|
344 | // |
---|
345 | // Update the incident particle |
---|
346 | // |
---|
347 | |
---|
348 | G4double finalEnergy = kineticEnergy - tGamma; |
---|
349 | |
---|
350 | // Kinematic problem |
---|
351 | if (finalEnergy < 0.) { |
---|
352 | tGamma += finalEnergy; |
---|
353 | finalEnergy = 0.0; |
---|
354 | } |
---|
355 | |
---|
356 | G4double momentum = std::sqrt((totalEnergy + electron_mass_c2)*kineticEnergy); |
---|
357 | |
---|
358 | G4double finalX = momentum*electronDirection.x() - tGamma*gammaDirection.x(); |
---|
359 | G4double finalY = momentum*electronDirection.y() - tGamma*gammaDirection.y(); |
---|
360 | G4double finalZ = momentum*electronDirection.z() - tGamma*gammaDirection.z(); |
---|
361 | |
---|
362 | aParticleChange.SetNumberOfSecondaries(1); |
---|
363 | G4double norm = 1./std::sqrt(finalX*finalX + finalY*finalY + finalZ*finalZ); |
---|
364 | aParticleChange.ProposeMomentumDirection(finalX*norm, finalY*norm, finalZ*norm); |
---|
365 | |
---|
366 | const G4ParticleDefinition* particle = track.GetDefinition(); |
---|
367 | |
---|
368 | if (finalEnergy > 0.) |
---|
369 | { |
---|
370 | aParticleChange.ProposeEnergy(finalEnergy) ; |
---|
371 | } |
---|
372 | else |
---|
373 | { |
---|
374 | aParticleChange.ProposeEnergy(0.) ; |
---|
375 | if (particle->GetProcessManager()->GetAtRestProcessVector()->size()) |
---|
376 | //In this case there is at least one AtRest process |
---|
377 | { |
---|
378 | aParticleChange.ProposeTrackStatus(fStopButAlive); |
---|
379 | } |
---|
380 | else |
---|
381 | { |
---|
382 | aParticleChange.ProposeTrackStatus(fStopAndKill); |
---|
383 | } |
---|
384 | } |
---|
385 | |
---|
386 | |
---|
387 | // create G4DynamicParticle object for the gamma |
---|
388 | G4DynamicParticle* aGamma= new G4DynamicParticle (G4Gamma::Gamma(), |
---|
389 | gammaDirection, tGamma); |
---|
390 | aParticleChange.AddSecondary(aGamma); |
---|
391 | |
---|
392 | return G4VContinuousDiscreteProcess::PostStepDoIt(track, step); |
---|
393 | } |
---|
394 | |
---|
395 | |
---|
396 | void G4PenelopeBremsstrahlung::PrintInfoDefinition() |
---|
397 | { |
---|
398 | G4String comments = "Total cross sections from EEDL database for electrons."; |
---|
399 | comments += "\n Total cross section for positrons calculated from the electrons"; |
---|
400 | comments += "\n through an empirical scaling function."; |
---|
401 | comments += "\n Gamma energy sampled from a data-driven histogram."; |
---|
402 | comments += "\n Implementation of the continuous dE/dx part."; |
---|
403 | comments += "\n It can be used for electrons and positrons"; |
---|
404 | comments += " in the energy range [250eV,100GeV]."; |
---|
405 | comments += "\n The process must work with G4PenelopeIonisation."; |
---|
406 | |
---|
407 | G4cout << G4endl << GetProcessName() << ": " << comments << G4endl; |
---|
408 | } |
---|
409 | |
---|
410 | G4bool G4PenelopeBremsstrahlung::IsApplicable(const G4ParticleDefinition& particle) |
---|
411 | { |
---|
412 | return ( (&particle == G4Electron::Electron()) || (&particle == G4Positron::Positron()) ); |
---|
413 | } |
---|
414 | |
---|
415 | |
---|
416 | G4double G4PenelopeBremsstrahlung::GetMeanFreePath(const G4Track& track, |
---|
417 | G4double, // previousStepSize |
---|
418 | G4ForceCondition* cond) |
---|
419 | { |
---|
420 | *cond = NotForced; |
---|
421 | G4int index = (track.GetMaterialCutsCouple())->GetIndex(); |
---|
422 | const G4VEMDataSet* data = theMeanFreePath->GetComponent(index); |
---|
423 | G4double meanFreePath = data->FindValue(track.GetKineticEnergy()); |
---|
424 | return meanFreePath; |
---|
425 | } |
---|
426 | |
---|
427 | void G4PenelopeBremsstrahlung::SetCutForLowEnSecPhotons(G4double cut) |
---|
428 | { |
---|
429 | cutForPhotons = cut; |
---|
430 | } |
---|
431 | |
---|
432 | void G4PenelopeBremsstrahlung::LoadAngularData() |
---|
433 | { |
---|
434 | const G4ProductionCutsTable* theCoupleTable= |
---|
435 | G4ProductionCutsTable::GetProductionCutsTable(); |
---|
436 | size_t numOfCouples = theCoupleTable->GetTableSize(); |
---|
437 | angularData->clear(); |
---|
438 | for (size_t j=0; j<numOfCouples; j++) { |
---|
439 | const G4MaterialCutsCouple* couple = theCoupleTable->GetMaterialCutsCouple(j); |
---|
440 | const G4Material* material= couple->GetMaterial(); |
---|
441 | const G4ElementVector* theElementVector = material->GetElementVector(); |
---|
442 | size_t NumberOfElements = material->GetNumberOfElements(); |
---|
443 | //loop for elements in the material |
---|
444 | for (size_t iel=0; iel<NumberOfElements; iel++ ) { |
---|
445 | G4int Z = (G4int)((*theElementVector)[iel]->GetZ()); |
---|
446 | //if the material is not present yet --> insert it in the map |
---|
447 | if (!(angularData->count(Z))) { |
---|
448 | angularData->insert(std::make_pair(Z,new G4PenelopeBremsstrahlungAngular(Z))); |
---|
449 | //G4cout << "Loaded......... Z= " << Z << G4endl; |
---|
450 | } |
---|
451 | } |
---|
452 | } |
---|
453 | } |
---|
454 | |
---|