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26 // 26 //
27 // Author: Sebastien Incerti 27 // Author: Sebastien Incerti
28 // 30 October 2008 28 // 30 October 2008
29 // on base of G4LowEnergyPolarizedRayl 29 // on base of G4LowEnergyPolarizedRayleigh developed by R. Capra
30 // 30 //
31 // History: 31 // History:
32 // -------- 32 // --------
33 // 02 May 2009 S Incerti as V. Ivanchenko pr 33 // 02 May 2009 S Incerti as V. Ivanchenko proposed in G4LivermoreRayleighModel.cc
34 // 34 //
35 // Cleanup initialisation and generation of se 35 // Cleanup initialisation and generation of secondaries:
36 // - apply internal high-ener 36 // - apply internal high-energy limit only in constructor
37 // - do not apply low-energy 37 // - do not apply low-energy limit (default is 0)
38 // - remove GetMeanFreePath m 38 // - remove GetMeanFreePath method and table
39 // - remove initialisation of 39 // - remove initialisation of element selector
40 // - use G4ElementSelector 40 // - use G4ElementSelector
41 41
42 #include "G4LivermorePolarizedRayleighModel.hh 42 #include "G4LivermorePolarizedRayleighModel.hh"
43 #include "G4PhysicalConstants.hh" 43 #include "G4PhysicalConstants.hh"
44 #include "G4SystemOfUnits.hh" 44 #include "G4SystemOfUnits.hh"
45 #include "G4LogLogInterpolation.hh" 45 #include "G4LogLogInterpolation.hh"
46 #include "G4CompositeEMDataSet.hh" 46 #include "G4CompositeEMDataSet.hh"
47 #include "G4AutoLock.hh" <<
48 47
49 //....oooOO0OOooo........oooOO0OOooo........oo 48 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
50 49
51 using namespace std; 50 using namespace std;
52 namespace { G4Mutex LivermorePolarizedRayleigh <<
53 51
54 //....oooOO0OOooo........oooOO0OOooo........oo 52 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
55 53
56 G4PhysicsFreeVector* G4LivermorePolarizedRayle << 54 G4int G4LivermorePolarizedRayleighModel::maxZ = 100;
57 G4PhysicsFreeVector* G4LivermorePolarizedRayle << 55 G4LPhysicsFreeVector* G4LivermorePolarizedRayleighModel::dataCS[] = {0};
>> 56 G4VEMDataSet* G4LivermorePolarizedRayleighModel::formFactorData = 0;
58 57
59 G4LivermorePolarizedRayleighModel::G4Livermore 58 G4LivermorePolarizedRayleighModel::G4LivermorePolarizedRayleighModel(const G4ParticleDefinition*,
60 const G4String& nam) 59 const G4String& nam)
61 :G4VEmModel(nam),fParticleChange(nullptr),is << 60 :G4VEmModel(nam),fParticleChange(0),isInitialised(false)
62 { 61 {
63 lowEnergyLimit = 250 * CLHEP::eV; << 62 fParticleChange =0;
>> 63 lowEnergyLimit = 250 * eV;
>> 64 //SetLowEnergyLimit(lowEnergyLimit);
>> 65 //SetHighEnergyLimit(highEnergyLimit);
64 // 66 //
65 verboseLevel= 0; 67 verboseLevel= 0;
66 // Verbosity scale: 68 // Verbosity scale:
67 // 0 = nothing 69 // 0 = nothing
68 // 1 = warning for energy non-conservation 70 // 1 = warning for energy non-conservation
69 // 2 = details of energy budget 71 // 2 = details of energy budget
70 // 3 = calculation of cross sections, file o 72 // 3 = calculation of cross sections, file openings, sampling of atoms
71 // 4 = entering in methods 73 // 4 = entering in methods
72 74
73 if(verboseLevel > 0) { 75 if(verboseLevel > 0) {
74 G4cout << "Livermore Polarized Rayleigh is 76 G4cout << "Livermore Polarized Rayleigh is constructed " << G4endl
75 << "Energy range: " << LowEnergyLim << 77 << "Energy range: "
76 << HighEnergyLimit() / CLHEP::GeV << " Ge << 78 << LowEnergyLimit() / eV << " eV - "
77 << G4endl; << 79 << HighEnergyLimit() / GeV << " GeV"
>> 80 << G4endl;
78 } 81 }
79 } 82 }
80 83
81 //....oooOO0OOooo........oooOO0OOooo........oo 84 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
82 85
83 G4LivermorePolarizedRayleighModel::~G4Livermor 86 G4LivermorePolarizedRayleighModel::~G4LivermorePolarizedRayleighModel()
84 { 87 {
85 if(IsMaster()) { << 88 if(IsMaster()) {
86 for(G4int i=0; i<maxZ; ++i) { << 89 for(G4int i=0; i<maxZ; ++i) {
87 if(dataCS[i]) { << 90 if(dataCS[i]) {
88 delete dataCS[i]; << 91 delete dataCS[i];
89 dataCS[i] = nullptr; << 92 dataCS[i] = 0;
90 delete formFactorData[i]; << 93 }
91 formFactorData[i] = nullptr; << 94 }
92 } << 95 delete formFactorData;
93 } << 96 formFactorData = 0;
94 } << 97
>> 98 }
95 } 99 }
96 100
97 //....oooOO0OOooo........oooOO0OOooo........oo 101 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
98 102
99 void G4LivermorePolarizedRayleighModel::Initia 103 void G4LivermorePolarizedRayleighModel::Initialise(const G4ParticleDefinition* particle,
100 const G 104 const G4DataVector& cuts)
101 { 105 {
102 // Rayleigh process: Th << 106 // Rayleigh process: The Quantum Theory of Radiation
103 // W. << 107 // W. Heitler, Oxford at the Clarendon Press, Oxford (1954)
104 // Scattering function: A << 108 // Scattering function: A simple model of photon transport
105 // D. << 109 // D.E. Cullen, Nucl. Instr. Meth. in Phys. Res. B 101 (1995) 499-510
106 // Polarization of the outcoming photon: Be << 110 // Polarization of the outcoming photon: Beam test of a prototype detector array for the PoGO astronomical hard X-ray/soft gamma-ray polarimeter
107 // X- << 111 // T. Mizuno et al., Nucl. Instr. Meth. in Phys. Res. A 540 (2005) 158-168
108 // T. << 112
109 if (verboseLevel > 3) 113 if (verboseLevel > 3)
110 G4cout << "Calling G4LivermorePolarizedRay 114 G4cout << "Calling G4LivermorePolarizedRayleighModel::Initialise()" << G4endl;
111 115
>> 116
112 if(IsMaster()) { 117 if(IsMaster()) {
113 118
>> 119 // Form Factor
>> 120
>> 121 G4VDataSetAlgorithm* ffInterpolation = new G4LogLogInterpolation;
>> 122 G4String formFactorFile = "rayl/re-ff-";
>> 123 formFactorData = new G4CompositeEMDataSet(ffInterpolation,1.,1.);
>> 124 formFactorData->LoadData(formFactorFile);
>> 125
114 // Initialise element selector 126 // Initialise element selector
115 InitialiseElementSelectors(particle, cuts) 127 InitialiseElementSelectors(particle, cuts);
116 128
117 // Access to elements 129 // Access to elements
118 const char* path = G4FindDataDir("G4LEDATA << 130 char* path = std::getenv("G4LEDATA");
119 auto elmTable = G4Element::GetElementTable << 131 G4ProductionCutsTable* theCoupleTable =
120 for (auto const & elm : *elmTable) { << 132 G4ProductionCutsTable::GetProductionCutsTable();
121 G4int Z = std::min(elm->GetZasInt(), max << 133 G4int numOfCouples = theCoupleTable->GetTableSize();
122 if( nullptr == dataCS[Z] ) { ReadData(Z, << 134
123 } << 135 for(G4int i=0; i<numOfCouples; ++i)
>> 136 {
>> 137 const G4MaterialCutsCouple* couple =
>> 138 theCoupleTable->GetMaterialCutsCouple(i);
>> 139 const G4Material* material = couple->GetMaterial();
>> 140 const G4ElementVector* theElementVector = material->GetElementVector();
>> 141 G4int nelm = material->GetNumberOfElements();
>> 142
>> 143 for (G4int j=0; j<nelm; ++j)
>> 144 {
>> 145 G4int Z = G4lrint((*theElementVector)[j]->GetZ());
>> 146 if(Z < 1) { Z = 1; }
>> 147 else if(Z > maxZ) { Z = maxZ; }
>> 148 if( (!dataCS[Z]) ) { ReadData(Z, path); }
>> 149 }
>> 150 }
124 } 151 }
125 152
126 if(isInitialised) { return; } 153 if(isInitialised) { return; }
127 fParticleChange = GetParticleChangeForGamma( 154 fParticleChange = GetParticleChangeForGamma();
128 isInitialised = true; 155 isInitialised = true;
>> 156
129 } 157 }
130 158
131 159
132 //....oooOO0OOooo........oooOO0OOooo........oo 160 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
133 161
134 void G4LivermorePolarizedRayleighModel::Initia << 162 void G4LivermorePolarizedRayleighModel::InitialiseLocal(const G4ParticleDefinition*,
135 const G4ParticleDefinition*, G << 163 G4VEmModel* masterModel)
136 { 164 {
137 SetElementSelectors(masterModel->GetElementS 165 SetElementSelectors(masterModel->GetElementSelectors());
138 } 166 }
139 167
140 //....oooOO0OOooo........oooOO0OOooo........oo 168 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
141 169
142 void G4LivermorePolarizedRayleighModel::ReadDa << 170 void G4LivermorePolarizedRayleighModel::ReadData(size_t Z, const char* path)
143 { 171 {
144 if (verboseLevel > 1) { << 172 if (verboseLevel > 1)
145 G4cout << "Calling ReadData() of G4Livermo << 173 {
146 << G4endl; << 174 G4cout << "Calling ReadData() of G4LivermoreRayleighModel"
147 } << 175 << G4endl;
>> 176 }
148 177
149 if(nullptr != dataCS[Z]) { return; } << 178 if(dataCS[Z]) { return; }
150 179
151 const char* datadir = path; 180 const char* datadir = path;
152 181
153 if(nullptr == datadir) << 182 if(!datadir)
154 { 183 {
155 datadir = G4FindDataDir("G4LEDATA"); << 184 datadir = std::getenv("G4LEDATA");
156 if(nullptr == datadir) << 185 if(!datadir)
157 { 186 {
158 G4Exception("G4LivermoreRayleighModelModel 187 G4Exception("G4LivermoreRayleighModelModel::ReadData()","em0006",
159 FatalException, 188 FatalException,
160 "Environment variable G4LEDATA not d 189 "Environment variable G4LEDATA not defined");
161 return; 190 return;
162 } 191 }
163 } 192 }
164 dataCS[Z] = new G4PhysicsFreeVector(); << 193
165 formFactorData[Z] = new G4PhysicsFreeVector( << 194 //
>> 195
>> 196 dataCS[Z] = new G4LPhysicsFreeVector();
>> 197
>> 198 // Activation of spline interpolation
>> 199 //dataCS[Z] ->SetSpline(true);
166 200
167 std::ostringstream ostCS; 201 std::ostringstream ostCS;
168 ostCS << datadir << "/livermore/rayl/re-cs-" 202 ostCS << datadir << "/livermore/rayl/re-cs-" << Z <<".dat";
169 std::ifstream finCS(ostCS.str().c_str()); 203 std::ifstream finCS(ostCS.str().c_str());
170 204
171 if( !finCS .is_open() ) { << 205 if( !finCS .is_open() )
172 G4ExceptionDescription ed; << 206 {
173 ed << "G4LivermorePolarizedRayleighModel d << 207 G4ExceptionDescription ed;
174 << "> is not opened!" << G4endl; << 208 ed << "G4LivermorePolarizedRayleighModel data file <" << ostCS.str().c_str()
175 G4Exception("G4LivermorePolarizedRayleighM << 209 << "> is not opened!" << G4endl;
176 FatalException, << 210 G4Exception("G4LivermorePolarizedRayleighModel::ReadData()","em0003",FatalException,
177 ed,"G4LEDATA version should be G4EMLOW8.0 << 211 ed,"G4LEDATA version should be G4EMLOW6.27 or later.");
178 return; << 212 return;
179 } else { << 213 }
180 if(verboseLevel > 3) { << 214 else
181 G4cout << "File " << ostCS.str() << 215 {
182 << " is opened by G4LivermoreRayleighMo << 216 if(verboseLevel > 3) {
183 } << 217 G4cout << "File " << ostCS.str()
184 dataCS[Z]->Retrieve(finCS, true); << 218 << " is opened by G4LivermoreRayleighModel" << G4endl;
185 } << 219 }
186 << 220 dataCS[Z]->Retrieve(finCS, true);
187 std::ostringstream ostFF; << 221 }
188 ostFF << datadir << "/livermore/rayl/re-ff-" << 222 }
189 std::ifstream finFF(ostFF.str().c_str()); <<
190 <<
191 if( !finFF.is_open() ) { <<
192 G4ExceptionDescription ed; <<
193 ed << "G4LivermorePolarizedRayleighModel d <<
194 << "> is not opened!" << G4endl; <<
195 G4Exception("G4LivermorePolarizedRayleighM <<
196 FatalException, <<
197 ed,"G4LEDATA version should be G4EMLOW8.0 <<
198 return; <<
199 } else { <<
200 if(verboseLevel > 3) { <<
201 G4cout << "File " << ostFF.str() <<
202 << " is opened by G4LivermoreRa <<
203 } <<
204 formFactorData[Z]->Retrieve(finFF, true); <<
205 } <<
206 } <<
207 223
208 //....oooOO0OOooo........oooOO0OOooo........oo << 224 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
209 225
210 G4double G4LivermorePolarizedRayleighModel::Co << 226 G4double G4LivermorePolarizedRayleighModel::ComputeCrossSectionPerAtom(
211 const 227 const G4ParticleDefinition*,
212 G4double GammaEnergy, 228 G4double GammaEnergy,
213 G4double Z, G4double, 229 G4double Z, G4double,
214 G4double, G4double) 230 G4double, G4double)
215 { << 231 {
216 if (verboseLevel > 1) { << 232 if (verboseLevel > 1)
217 G4cout << "G4LivermoreRayleighModel::Compu << 233 {
218 << G4endl; << 234 G4cout << "G4LivermoreRayleighModel::ComputeCrossSectionPerAtom()"
219 } << 235 << G4endl;
>> 236 }
220 237
221 if(GammaEnergy < lowEnergyLimit) { return 0. << 238 if(GammaEnergy < lowEnergyLimit) { return 0.0; }
>> 239
>> 240 G4double xs = 0.0;
222 241
223 G4double xs = 0.0; << 242 G4int intZ = G4lrint(Z);
224 243
225 G4int intZ = G4lrint(Z); << 244 if(intZ < 1 || intZ > maxZ) { return xs; }
226 if(intZ < 1 || intZ > maxZ) { return xs; } <<
227 245
228 G4PhysicsFreeVector* pv = dataCS[intZ]; << 246 G4LPhysicsFreeVector* pv = dataCS[intZ];
229 247
230 // if element was not initialised << 248 // if element was not initialised
231 // do initialisation safely for MT mode << 249 // do initialisation safely for MT mode
232 if(nullptr == pv) { << 250 if(!pv) {
233 InitialiseForElement(0, intZ); << 251 InitialiseForElement(0, intZ);
234 pv = dataCS[intZ]; << 252 pv = dataCS[intZ];
235 if(nullptr == pv) { return xs; } << 253 if(!pv) { return xs; }
236 } << 254 }
>> 255
>> 256 G4int n = pv->GetVectorLength() - 1;
>> 257 G4double e = GammaEnergy/MeV;
>> 258 if(e >= pv->Energy(n)) {
>> 259 xs = (*pv)[n]/(e*e);
>> 260 } else if(e >= pv->Energy(0)) {
>> 261 xs = pv->Value(e)/(e*e);
>> 262 }
237 263
238 G4int n = G4int(pv->GetVectorLength() - 1); << 264 /* if(verboseLevel > 0)
239 G4double e = GammaEnergy/MeV; << 265 {
240 if(e >= pv->Energy(n)) { << 266 G4cout << "****** DEBUG: tcs value for Z=" << Z << " at energy (MeV)="
241 xs = (*pv)[n]/(e*e); << 267 << e << G4endl;
242 } else if(e >= pv->Energy(0)) { << 268 G4cout << " cs (Geant4 internal unit)=" << xs << G4endl;
243 xs = pv->Value(e)/(e*e); << 269 G4cout << " -> first E*E*cs value in CS data file (iu) =" << (*pv)[0]
244 } << 270 << G4endl;
245 return xs; << 271 G4cout << " -> last E*E*cs value in CS data file (iu) =" << (*pv)[n]
246 } << 272 << G4endl;
>> 273 G4cout << "*********************************************************"
>> 274 << G4endl;
>> 275 }
>> 276 */
>> 277
>> 278 return xs;
>> 279 }
247 280
248 //....oooOO0OOooo........oooOO0OOooo........oo 281 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
249 282
250 void G4LivermorePolarizedRayleighModel::Sample << 283 void G4LivermorePolarizedRayleighModel::SampleSecondaries(std::vector<G4DynamicParticle*>* /*fvect*/,
251 std::vector<G4DynamicParticle* << 284 const G4MaterialCutsCouple* couple,
252 const G4MaterialCutsCouple* couple, << 285 const G4DynamicParticle* aDynamicGamma,
253 const G4DynamicParticle* aDynamicGamma, << 286 G4double,
254 G4double, G4double) << 287 G4double)
255 { 288 {
256 if (verboseLevel > 3) 289 if (verboseLevel > 3)
257 G4cout << "Calling SampleSecondaries() of 290 G4cout << "Calling SampleSecondaries() of G4LivermorePolarizedRayleighModel" << G4endl;
258 291
259 G4double photonEnergy0 = aDynamicGamma->GetK 292 G4double photonEnergy0 = aDynamicGamma->GetKineticEnergy();
260 293
261 if (photonEnergy0 <= lowEnergyLimit) 294 if (photonEnergy0 <= lowEnergyLimit)
262 { 295 {
263 fParticleChange->ProposeTrackStatus(fStopA << 296 fParticleChange->ProposeTrackStatus(fStopAndKill);
264 fParticleChange->SetProposedKineticEnergy( << 297 fParticleChange->SetProposedKineticEnergy(0.);
265 fParticleChange->ProposeLocalEnergyDeposit << 298 fParticleChange->ProposeLocalEnergyDeposit(photonEnergy0);
266 return; << 299 return ;
267 } 300 }
268 301
269 G4ParticleMomentum photonDirection0 = aDynam 302 G4ParticleMomentum photonDirection0 = aDynamicGamma->GetMomentumDirection();
270 303
271 // Select randomly one element in the curren 304 // Select randomly one element in the current material
>> 305 // G4int Z = crossSectionHandler->SelectRandomAtom(couple,photonEnergy0);
272 const G4ParticleDefinition* particle = aDyn 306 const G4ParticleDefinition* particle = aDynamicGamma->GetDefinition();
273 const G4Element* elm = SelectRandomAtom(coup 307 const G4Element* elm = SelectRandomAtom(couple,particle,photonEnergy0);
274 G4int Z = elm->GetZasInt(); << 308 G4int Z = (G4int)elm->GetZ();
275 309
276 G4double outcomingPhotonCosTheta = GenerateC 310 G4double outcomingPhotonCosTheta = GenerateCosTheta(photonEnergy0, Z);
277 G4double outcomingPhotonPhi = GeneratePhi(ou 311 G4double outcomingPhotonPhi = GeneratePhi(outcomingPhotonCosTheta);
278 G4double beta = GeneratePolarizationAngle(); << 312 G4double beta=GeneratePolarizationAngle();
279 313
280 // incomingPhoton reference frame: 314 // incomingPhoton reference frame:
281 // z = versor parallel to the incomingPhoton 315 // z = versor parallel to the incomingPhotonDirection
282 // x = versor parallel to the incomingPhoton 316 // x = versor parallel to the incomingPhotonPolarization
283 // y = defined as z^x 317 // y = defined as z^x
284 318
285 // outgoingPhoton reference frame: 319 // outgoingPhoton reference frame:
286 // z' = versor parallel to the outgoingPhoto 320 // z' = versor parallel to the outgoingPhotonDirection
287 // x' = defined as x-x*z'z' normalized 321 // x' = defined as x-x*z'z' normalized
288 // y' = defined as z'^x' << 322 // y' = defined as z'^x'
>> 323
289 G4ThreeVector z(aDynamicGamma->GetMomentumDi 324 G4ThreeVector z(aDynamicGamma->GetMomentumDirection().unit());
290 G4ThreeVector x(GetPhotonPolarization(*aDyna 325 G4ThreeVector x(GetPhotonPolarization(*aDynamicGamma));
291 G4ThreeVector y(z.cross(x)); 326 G4ThreeVector y(z.cross(x));
292 327
293 // z' = std::cos(phi)*std::sin(theta) << 328 // z' = std::cos(phi)*std::sin(theta) x + std::sin(phi)*std::sin(theta) y + std::cos(theta) z
294 // x + std::sin(phi)*std::sin(theta) y + std <<
295 G4double xDir; 329 G4double xDir;
296 G4double yDir; 330 G4double yDir;
297 G4double zDir; 331 G4double zDir;
298 zDir=outcomingPhotonCosTheta; 332 zDir=outcomingPhotonCosTheta;
299 xDir=std::sqrt(1-outcomingPhotonCosTheta*out 333 xDir=std::sqrt(1-outcomingPhotonCosTheta*outcomingPhotonCosTheta);
300 yDir=xDir; 334 yDir=xDir;
301 xDir*=std::cos(outcomingPhotonPhi); 335 xDir*=std::cos(outcomingPhotonPhi);
302 yDir*=std::sin(outcomingPhotonPhi); 336 yDir*=std::sin(outcomingPhotonPhi);
303 337
304 G4ThreeVector zPrime((xDir*x + yDir*y + zDir 338 G4ThreeVector zPrime((xDir*x + yDir*y + zDir*z).unit());
305 G4ThreeVector xPrime(x.perpPart(zPrime).unit 339 G4ThreeVector xPrime(x.perpPart(zPrime).unit());
306 G4ThreeVector yPrime(zPrime.cross(xPrime)); 340 G4ThreeVector yPrime(zPrime.cross(xPrime));
307 341
308 // outgoingPhotonPolarization is directed as << 342 // outgoingPhotonPolarization is directed as x' std::cos(beta) + y' std::sin(beta)
309 // x' std::cos(beta) + y' std::sin(beta) <<
310 G4ThreeVector outcomingPhotonPolarization(xP 343 G4ThreeVector outcomingPhotonPolarization(xPrime*std::cos(beta) + yPrime*std::sin(beta));
311 344
312 fParticleChange->ProposeMomentumDirection(zP 345 fParticleChange->ProposeMomentumDirection(zPrime);
313 fParticleChange->ProposePolarization(outcomi 346 fParticleChange->ProposePolarization(outcomingPhotonPolarization);
314 fParticleChange->SetProposedKineticEnergy(ph 347 fParticleChange->SetProposedKineticEnergy(photonEnergy0);
>> 348
315 } 349 }
316 350
317 //....oooOO0OOooo........oooOO0OOooo........oo 351 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
318 352
319 G4double G4LivermorePolarizedRayleighModel::Ge << 353 G4double G4LivermorePolarizedRayleighModel::GenerateCosTheta(G4double incomingPhotonEnergy, G4int zAtom) const
320 { 354 {
321 // d sigma 355 // d sigma k0
322 // --------- = r0^2 * pi * F^2(x, Z) * ( 2 356 // --------- = r0^2 * pi * F^2(x, Z) * ( 2 - sin^2 theta) * std::sin (theta), x = ---- std::sin(theta/2)
323 // d theta 357 // d theta hc
324 358
325 // d sigma 359 // d sigma k0 1 - y
326 // --------- = r0^2 * pi * F^2(x, Z) * ( 1 + 360 // --------- = r0^2 * pi * F^2(x, Z) * ( 1 + y^2), x = ---- std::sqrt ( ------- ), y = std::cos(theta)
327 // d y 361 // d y hc 2
328 362
329 // Z 363 // Z
330 // F(x, Z) ~ -------- 364 // F(x, Z) ~ --------
331 // a + bx 365 // a + bx
332 // 366 //
333 // The time to exit from the outer loop grow 367 // The time to exit from the outer loop grows as ~ k0
334 // On pcgeant2 the time is ~ 1 s for k0 ~ 1 368 // On pcgeant2 the time is ~ 1 s for k0 ~ 1 MeV on the oxygen element. A 100 GeV
335 // event will take ~ 10 hours. 369 // event will take ~ 10 hours.
336 // 370 //
337 // On the avarage the inner loop does 1.5 it 371 // On the avarage the inner loop does 1.5 iterations before exiting
338 const G4double xxfact = CLHEP::cm/(CLHEP::h_ << 372
339 const G4double xFactor = incomingPhotonEnerg << 373 const G4double xFactor = (incomingPhotonEnergy*cm)/(h_Planck*c_light);
>> 374 //const G4VEMDataSet * formFactorData = GetScatterFunctionData();
340 375
341 G4double cosTheta; 376 G4double cosTheta;
342 G4double fCosTheta; 377 G4double fCosTheta;
343 G4double x; 378 G4double x;
344 G4double fValue; 379 G4double fValue;
345 380
346 if (incomingPhotonEnergy > 5.*CLHEP::MeV) << 381 if (incomingPhotonEnergy > 5.*MeV)
347 { 382 {
348 cosTheta = 1.; 383 cosTheta = 1.;
349 } 384 }
350 else 385 else
351 { 386 {
352 do 387 do
353 { 388 {
354 do 389 do
355 { 390 {
356 cosTheta = 2.*G4UniformRand()-1.; 391 cosTheta = 2.*G4UniformRand()-1.;
357 fCosTheta = (1.+cosTheta*cosTheta)/2.; 392 fCosTheta = (1.+cosTheta*cosTheta)/2.;
358 } 393 }
359 while (fCosTheta < G4UniformRand()); 394 while (fCosTheta < G4UniformRand());
360 395
361 x = xFactor*std::sqrt((1.-cosTheta)/2.); 396 x = xFactor*std::sqrt((1.-cosTheta)/2.);
362 397
363 if (x > 1.e+005) 398 if (x > 1.e+005)
364 fValue = formFactorData[Z]->Value(x); << 399 fValue = formFactorData->FindValue(x, zAtom-1);
365 else 400 else
366 fValue = formFactorData[Z]->Value(0.); << 401 fValue = formFactorData->FindValue(0., zAtom-1);
367 402
368 fValue /= Z; << 403 fValue/=zAtom;
369 fValue *= fValue; << 404 fValue*=fValue;
370 } 405 }
371 while(fValue < G4UniformRand()); 406 while(fValue < G4UniformRand());
372 } 407 }
373 408
374 return cosTheta; 409 return cosTheta;
375 } 410 }
376 411
377 //....oooOO0OOooo........oooOO0OOooo........oo 412 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
378 413
379 G4double G4LivermorePolarizedRayleighModel::Ge 414 G4double G4LivermorePolarizedRayleighModel::GeneratePhi(G4double cosTheta) const
380 { 415 {
381 // d sigma 416 // d sigma
382 // --------- = alpha * ( 1 - sin^2 (theta) * 417 // --------- = alpha * ( 1 - sin^2 (theta) * cos^2 (phi) )
383 // d phi 418 // d phi
384 419
385 // On the average the loop takes no more tha 420 // On the average the loop takes no more than 2 iterations before exiting
386 421
387 G4double phi; 422 G4double phi;
388 G4double cosPhi; 423 G4double cosPhi;
389 G4double phiProbability; 424 G4double phiProbability;
390 G4double sin2Theta; 425 G4double sin2Theta;
391 426
392 sin2Theta=1.-cosTheta*cosTheta; 427 sin2Theta=1.-cosTheta*cosTheta;
393 428
394 do 429 do
395 { 430 {
396 phi = CLHEP::twopi * G4UniformRand(); << 431 phi = twopi * G4UniformRand();
397 cosPhi = std::cos(phi); 432 cosPhi = std::cos(phi);
398 phiProbability= 1. - sin2Theta*cosPhi*co 433 phiProbability= 1. - sin2Theta*cosPhi*cosPhi;
399 } 434 }
400 while (phiProbability < G4UniformRand()); 435 while (phiProbability < G4UniformRand());
401 436
402 return phi; 437 return phi;
403 } 438 }
404 439
405 //....oooOO0OOooo........oooOO0OOooo........oo 440 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
406 441
407 G4double G4LivermorePolarizedRayleighModel::Ge 442 G4double G4LivermorePolarizedRayleighModel::GeneratePolarizationAngle(void) const
408 { 443 {
409 // Rayleigh polarization is always on the x' 444 // Rayleigh polarization is always on the x' direction
>> 445
410 return 0; 446 return 0;
411 } 447 }
412 448
413 //....oooOO0OOooo........oooOO0OOooo........oo 449 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
414 450
415 G4ThreeVector G4LivermorePolarizedRayleighMode 451 G4ThreeVector G4LivermorePolarizedRayleighModel::GetPhotonPolarization(const G4DynamicParticle& photon)
416 { 452 {
417 // From G4VLowEnergyDiscretePhotonProcess.cc << 453
>> 454 // SI - From G4VLowEnergyDiscretePhotonProcess.cc
>> 455
418 G4ThreeVector photonMomentumDirection; 456 G4ThreeVector photonMomentumDirection;
419 G4ThreeVector photonPolarization; 457 G4ThreeVector photonPolarization;
420 458
421 photonPolarization = photon.GetPolarization( 459 photonPolarization = photon.GetPolarization();
422 photonMomentumDirection = photon.GetMomentum 460 photonMomentumDirection = photon.GetMomentumDirection();
423 461
424 if ((!photonPolarization.isOrthogonal(photon 462 if ((!photonPolarization.isOrthogonal(photonMomentumDirection, 1e-6)) || photonPolarization.mag()==0.)
425 { 463 {
426 // if |photonPolarization|==0. or |photo 464 // if |photonPolarization|==0. or |photonPolarization * photonDirection0| > 1e-6 * |photonPolarization ^ photonDirection0|
427 // then polarization is choosen randomly << 465 // then polarization is choosen randomly.
>> 466
428 G4ThreeVector e1(photonMomentumDirection 467 G4ThreeVector e1(photonMomentumDirection.orthogonal().unit());
429 G4ThreeVector e2(photonMomentumDirection 468 G4ThreeVector e2(photonMomentumDirection.cross(e1).unit());
430 469
431 G4double angle(G4UniformRand() * CLHEP:: << 470 G4double angle(G4UniformRand() * twopi);
432 471
433 e1*=std::cos(angle); 472 e1*=std::cos(angle);
434 e2*=std::sin(angle); 473 e2*=std::sin(angle);
435 474
436 photonPolarization=e1+e2; 475 photonPolarization=e1+e2;
437 } 476 }
438 else if (photonPolarization.howOrthogonal(ph 477 else if (photonPolarization.howOrthogonal(photonMomentumDirection) != 0.)
439 { 478 {
440 // if |photonPolarization * photonDirect 479 // if |photonPolarization * photonDirection0| != 0.
441 // then polarization is made orthonormal << 480 // then polarization is made orthonormal;
>> 481
442 photonPolarization=photonPolarization.pe 482 photonPolarization=photonPolarization.perpPart(photonMomentumDirection);
443 } 483 }
444 484
445 return photonPolarization.unit(); 485 return photonPolarization.unit();
446 } 486 }
447 487
448 //....oooOO0OOooo........oooOO0OOooo........oo 488 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
449 489
450 void G4LivermorePolarizedRayleighModel::Initia << 490 #include "G4AutoLock.hh"
451 const G4ParticleDefinition*, G << 491 namespace { G4Mutex LivermorePolarizedRayleighModelMutex = G4MUTEX_INITIALIZER; }
452 { << 492
453 G4AutoLock l(&LivermorePolarizedRayleighMode << 493 void G4LivermorePolarizedRayleighModel::InitialiseForElement(const G4ParticleDefinition*,
454 if(nullptr == dataCS[Z]) { ReadData(Z); } << 494 G4int Z)
455 l.unlock(); << 495 {
456 } << 496 G4AutoLock l(&LivermorePolarizedRayleighModelMutex);
>> 497 // G4cout << "G4LivermoreRayleighModel::InitialiseForElement Z= "
>> 498 // << Z << G4endl;
>> 499 if(!dataCS[Z]) { ReadData(Z); }
>> 500 l.unlock();
>> 501 }
457 502