source: trunk/source/processes/electromagnetic/lowenergy/src/G4DNAChampionElasticModel.cc @ 1337

Last change on this file since 1337 was 1337, checked in by garnier, 14 years ago

tag geant4.9.4 beta 1 + modifs locales
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26// $Id: G4DNAChampionElasticModel.cc,v 1.12 2010/04/08 17:29:08 sincerti Exp $
27// GEANT4 tag $Name: geant4-09-04-beta-01 $
28//
29
30#include "G4DNAChampionElasticModel.hh"
31
32//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
33
34using namespace std;
35
36//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
37
38G4DNAChampionElasticModel::G4DNAChampionElasticModel(const G4ParticleDefinition*,
39                                             const G4String& nam)
40:G4VEmModel(nam),isInitialised(false)
41{
42
43  killBelowEnergy = 8.23*eV; // Minimum e- energy for energy loss by excitation
44  lowEnergyLimit = 0 * eV; 
45  lowEnergyLimitOfModel = 7.4 * eV; // The model lower energy is 7.4 eV
46  highEnergyLimit = 10 * MeV;
47  SetLowEnergyLimit(lowEnergyLimit);
48  SetHighEnergyLimit(highEnergyLimit);
49
50  verboseLevel= 0;
51  // Verbosity scale:
52  // 0 = nothing
53  // 1 = warning for energy non-conservation
54  // 2 = details of energy budget
55  // 3 = calculation of cross sections, file openings, sampling of atoms
56  // 4 = entering in methods
57 
58  if( verboseLevel>0 ) 
59  { 
60    G4cout << "Champion Elastic model is constructed " << G4endl
61           << "Energy range: "
62           << lowEnergyLimit / eV << " eV - "
63           << highEnergyLimit / MeV << " MeV"
64           << G4endl;
65  }
66}
67
68//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
69
70G4DNAChampionElasticModel::~G4DNAChampionElasticModel()
71{ 
72  // For total cross section
73 
74  std::map< G4String,G4DNACrossSectionDataSet*,std::less<G4String> >::iterator pos;
75  for (pos = tableData.begin(); pos != tableData.end(); ++pos)
76  {
77    G4DNACrossSectionDataSet* table = pos->second;
78    delete table;
79  }
80
81   // For final state
82   
83   eVecm.clear();
84
85}
86
87//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
88
89void G4DNAChampionElasticModel::Initialise(const G4ParticleDefinition* /*particle*/,
90                                       const G4DataVector& /*cuts*/)
91{
92
93  if (verboseLevel > 3)
94    G4cout << "Calling G4DNAChampionElasticModel::Initialise()" << G4endl;
95
96  // Energy limits
97 
98  if (LowEnergyLimit() < lowEnergyLimit)
99  {
100    G4cout << "G4DNAChampionElasticModel: low energy limit increased from " << 
101        LowEnergyLimit()/eV << " eV to " << lowEnergyLimit/eV << " eV" << G4endl;
102    SetLowEnergyLimit(lowEnergyLimit);
103    }
104
105  if (HighEnergyLimit() > highEnergyLimit)
106  {
107    G4cout << "G4DNAChampionElasticModel: high energy limit decreased from " << 
108        HighEnergyLimit()/MeV << " MeV to " << highEnergyLimit/MeV << " MeV" << G4endl;
109    SetHighEnergyLimit(highEnergyLimit);
110  }
111
112  // Reading of data files
113 
114  G4double scaleFactor = 1e-16*cm*cm;
115
116  G4String fileElectron("dna/sigma_elastic_e_champion");
117
118  G4ParticleDefinition* electronDef = G4Electron::ElectronDefinition();
119  G4String electron;
120 
121  if (electronDef != 0)
122  {
123    // For total cross section
124   
125    electron = electronDef->GetParticleName();
126
127    tableFile[electron] = fileElectron;
128
129    G4DNACrossSectionDataSet* tableE = new G4DNACrossSectionDataSet(new G4LogLogInterpolation, eV,scaleFactor );
130    tableE->LoadData(fileElectron);
131    tableData[electron] = tableE;
132   
133    // For final state
134
135    char *path = getenv("G4LEDATA");
136 
137    if (!path)
138    G4Exception("G4FinalStateElasticChampion::Initialise: G4LEDATA environment variable not set");
139
140    std::ostringstream eFullFileName;
141    eFullFileName << path << "/dna/sigmadiff_cumulated_elastic_e_champion.dat";
142    std::ifstream eDiffCrossSection(eFullFileName.str().c_str());
143     
144    if (!eDiffCrossSection) G4Exception("G4DNAChampionElasticModel::Initialise: error opening electron DATA FILE");
145     
146    eTdummyVec.push_back(0.);
147
148    while(!eDiffCrossSection.eof())
149    {
150        double tDummy;
151        double eDummy;
152        eDiffCrossSection>>tDummy>>eDummy;
153       
154        // SI : mandatory eVecm initialization
155       
156        if (tDummy != eTdummyVec.back()) 
157        { 
158          eTdummyVec.push_back(tDummy); 
159          eVecm[tDummy].push_back(0.);
160        }
161         
162        eDiffCrossSection>>eDiffCrossSectionData[tDummy][eDummy];
163
164        if (eDummy != eVecm[tDummy].back()) eVecm[tDummy].push_back(eDummy);
165       
166    }
167
168    // End final state
169 
170  }
171  else G4Exception("G4DNAChampionElasticModel::Initialise: electron is not defined");
172 
173  if (verboseLevel > 2) 
174    G4cout << "Loaded cross section files for Champion Elastic model" << G4endl;
175
176  if( verboseLevel>0 ) 
177  { 
178    G4cout << "Champion Elastic model is initialized " << G4endl
179           << "Energy range: "
180           << LowEnergyLimit() / eV << " eV - "
181           << HighEnergyLimit() / MeV << " MeV"
182           << G4endl;
183  }
184
185  if(!isInitialised) 
186  {
187    isInitialised = true;
188 
189    if(pParticleChange)
190      fParticleChangeForGamma = reinterpret_cast<G4ParticleChangeForGamma*>(pParticleChange);
191    else
192      fParticleChangeForGamma = new G4ParticleChangeForGamma();
193  }   
194
195  // InitialiseElementSelectors(particle,cuts);
196
197}
198
199//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
200
201G4double G4DNAChampionElasticModel::CrossSectionPerVolume(const G4Material* material,
202                                           const G4ParticleDefinition* p,
203                                           G4double ekin,
204                                           G4double,
205                                           G4double)
206{
207  if (verboseLevel > 3)
208    G4cout << "Calling CrossSectionPerVolume() of G4DNAChampionElasticModel" << G4endl;
209
210 // Calculate total cross section for model
211
212 G4double sigma=0;
213 
214 if (material->GetName() == "G4_WATER")
215 {
216  const G4String& particleName = p->GetParticleName();
217
218  if (ekin < highEnergyLimit)
219  {
220      //SI : XS must not be zero otherwise sampling of secondaries method ignored
221      if (ekin < lowEnergyLimitOfModel) ekin = lowEnergyLimitOfModel;
222      //     
223     
224        std::map< G4String,G4DNACrossSectionDataSet*,std::less<G4String> >::iterator pos;
225        pos = tableData.find(particleName);
226       
227        if (pos != tableData.end())
228        {
229          G4DNACrossSectionDataSet* table = pos->second;
230          if (table != 0)
231          {
232            sigma = table->FindValue(ekin);
233          }
234        }
235        else
236        {
237            G4Exception("G4DNAChampionElasticModel::ComputeCrossSectionPerVolume: attempting to calculate cross section for wrong particle");
238        }
239  }
240
241  if (verboseLevel > 3)
242  {
243    G4cout << "---> Kinetic energy(eV)=" << ekin/eV << G4endl;
244    G4cout << " - Cross section per water molecule (cm^2)=" << sigma/cm/cm << G4endl;
245    G4cout << " - Cross section per water molecule (cm^-1)=" << sigma*material->GetAtomicNumDensityVector()[1]/(1./cm) << G4endl;
246  } 
247
248 } 
249         
250 return sigma*material->GetAtomicNumDensityVector()[1];           
251}
252
253//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
254
255void G4DNAChampionElasticModel::SampleSecondaries(std::vector<G4DynamicParticle*>* /*fvect*/,
256                                              const G4MaterialCutsCouple* /*couple*/,
257                                              const G4DynamicParticle* aDynamicElectron,
258                                              G4double,
259                                              G4double)
260{
261
262  if (verboseLevel > 3)
263    G4cout << "Calling SampleSecondaries() of G4DNAChampionElasticModel" << G4endl;
264
265  G4double electronEnergy0 = aDynamicElectron->GetKineticEnergy();
266 
267  if (electronEnergy0 < killBelowEnergy)
268  {
269    fParticleChangeForGamma->ProposeTrackStatus(fStopAndKill);
270    fParticleChangeForGamma->ProposeLocalEnergyDeposit(electronEnergy0);
271    return ;
272  }
273
274  if (electronEnergy0>= killBelowEnergy && electronEnergy0 < highEnergyLimit)
275  { 
276 
277    G4double cosTheta = RandomizeCosTheta(electronEnergy0);
278 
279    G4double phi = 2. * pi * G4UniformRand();
280
281    G4ThreeVector zVers = aDynamicElectron->GetMomentumDirection();
282    G4ThreeVector xVers = zVers.orthogonal();
283    G4ThreeVector yVers = zVers.cross(xVers);
284
285    G4double xDir = std::sqrt(1. - cosTheta*cosTheta);
286    G4double yDir = xDir;
287    xDir *= std::cos(phi);
288    yDir *= std::sin(phi);
289
290    G4ThreeVector zPrimeVers((xDir*xVers + yDir*yVers + cosTheta*zVers));
291
292    fParticleChangeForGamma->ProposeMomentumDirection(zPrimeVers.unit()) ;
293
294    fParticleChangeForGamma->SetProposedKineticEnergy(electronEnergy0);
295  }
296
297}
298
299//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
300
301G4double G4DNAChampionElasticModel::Theta
302  (G4ParticleDefinition * particleDefinition, G4double k, G4double integrDiff)                                                   
303{
304  G4double theta = 0.;
305  G4double valueT1 = 0;
306  G4double valueT2 = 0;
307  G4double valueE21 = 0;
308  G4double valueE22 = 0;
309  G4double valueE12 = 0;
310  G4double valueE11 = 0;
311  G4double xs11 = 0;   
312  G4double xs12 = 0; 
313  G4double xs21 = 0; 
314  G4double xs22 = 0; 
315
316  if (particleDefinition == G4Electron::ElectronDefinition()) 
317  {
318    std::vector<double>::iterator t2 = std::upper_bound(eTdummyVec.begin(),eTdummyVec.end(), k);
319    std::vector<double>::iterator t1 = t2-1;
320 
321    std::vector<double>::iterator e12 = std::upper_bound(eVecm[(*t1)].begin(),eVecm[(*t1)].end(), integrDiff);
322    std::vector<double>::iterator e11 = e12-1;
323         
324    std::vector<double>::iterator e22 = std::upper_bound(eVecm[(*t2)].begin(),eVecm[(*t2)].end(), integrDiff);
325    std::vector<double>::iterator e21 = e22-1;
326               
327    valueT1  =*t1;
328    valueT2  =*t2;
329    valueE21 =*e21;
330    valueE22 =*e22;
331    valueE12 =*e12;
332    valueE11 =*e11;
333
334    xs11 = eDiffCrossSectionData[valueT1][valueE11];
335    xs12 = eDiffCrossSectionData[valueT1][valueE12];
336    xs21 = eDiffCrossSectionData[valueT2][valueE21];
337    xs22 = eDiffCrossSectionData[valueT2][valueE22];
338  }
339 
340  if (xs11==0 && xs12==0 && xs21==0 && xs22==0) return (0.);   
341 
342  theta = QuadInterpolator   ( valueE11, valueE12, 
343                               valueE21, valueE22, 
344                               xs11, xs12, 
345                               xs21, xs22, 
346                               valueT1, valueT2, 
347                               k, integrDiff );
348                               
349  return theta;
350}
351
352//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
353
354G4double G4DNAChampionElasticModel::LinLogInterpolate(G4double e1, 
355                                                        G4double e2, 
356                                                        G4double e, 
357                                                        G4double xs1, 
358                                                        G4double xs2)
359{
360  G4double d1 = std::log(xs1);
361  G4double d2 = std::log(xs2);
362  G4double value = std::exp(d1 + (d2 - d1)*(e - e1)/ (e2 - e1));
363  return value;
364}
365
366//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
367
368G4double G4DNAChampionElasticModel::LinLinInterpolate(G4double e1, 
369                                                        G4double e2, 
370                                                        G4double e, 
371                                                        G4double xs1, 
372                                                        G4double xs2)
373{
374  G4double d1 = xs1;
375  G4double d2 = xs2;
376  G4double value = (d1 + (d2 - d1)*(e - e1)/ (e2 - e1));
377  return value;
378}
379
380//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
381
382G4double G4DNAChampionElasticModel::LogLogInterpolate(G4double e1, 
383                                                        G4double e2, 
384                                                        G4double e, 
385                                                        G4double xs1, 
386                                                        G4double xs2)
387{
388  G4double a = (std::log10(xs2)-std::log10(xs1)) / (std::log10(e2)-std::log10(e1));
389  G4double b = std::log10(xs2) - a*std::log10(e2);
390  G4double sigma = a*std::log10(e) + b;
391  G4double value = (std::pow(10.,sigma));
392  return value;
393}
394
395//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
396
397
398G4double G4DNAChampionElasticModel::QuadInterpolator(G4double e11, G4double e12, 
399                                                       G4double e21, G4double e22, 
400                                                       G4double xs11, G4double xs12, 
401                                                       G4double xs21, G4double xs22, 
402                                                       G4double t1, G4double t2, 
403                                                       G4double t, G4double e)
404{
405  // Log-Log
406/*
407  G4double interpolatedvalue1 = LogLogInterpolate(e11, e12, e, xs11, xs12);
408  G4double interpolatedvalue2 = LogLogInterpolate(e21, e22, e, xs21, xs22);
409  G4double value = LogLogInterpolate(t1, t2, t, interpolatedvalue1, interpolatedvalue2);
410
411
412  // Lin-Log
413  G4double interpolatedvalue1 = LinLogInterpolate(e11, e12, e, xs11, xs12);
414  G4double interpolatedvalue2 = LinLogInterpolate(e21, e22, e, xs21, xs22);
415  G4double value = LinLogInterpolate(t1, t2, t, interpolatedvalue1, interpolatedvalue2);
416*/
417
418  // Lin-Lin
419  G4double interpolatedvalue1 = LinLinInterpolate(e11, e12, e, xs11, xs12);
420  G4double interpolatedvalue2 = LinLinInterpolate(e21, e22, e, xs21, xs22);
421  G4double value = LinLinInterpolate(t1, t2, t, interpolatedvalue1, interpolatedvalue2);
422
423  return value;
424}
425
426//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
427
428G4double G4DNAChampionElasticModel::RandomizeCosTheta(G4double k) 
429{
430 
431 G4double integrdiff=0;
432 G4double uniformRand=G4UniformRand();
433 integrdiff = uniformRand;
434 
435 G4double theta=0.;
436 G4double cosTheta=0.;
437 theta = Theta(G4Electron::ElectronDefinition(),k/eV,integrdiff);
438
439 cosTheta= std::cos(theta*pi/180);
440
441 return cosTheta; 
442}
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