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>> 26 // $Id: G4LivermorePolarizedRayleighModel.cc,v 1.1 2008/10/30 14:16:35 sincerti Exp $
>> 27 // GEANT4 tag $Name: geant4-09-02-patch-03 $
26 // 28 //
27 // Author: Sebastien Incerti <<
28 // 30 October 2008 <<
29 // on base of G4LowEnergyPolarizedRayl <<
30 // <<
31 // History: <<
32 // -------- <<
33 // 02 May 2009 S Incerti as V. Ivanchenko pr <<
34 // <<
35 // Cleanup initialisation and generation of se <<
36 // - apply internal high-ener <<
37 // - do not apply low-energy <<
38 // - remove GetMeanFreePath m <<
39 // - remove initialisation of <<
40 // - use G4ElementSelector <<
41 29
42 #include "G4LivermorePolarizedRayleighModel.hh 30 #include "G4LivermorePolarizedRayleighModel.hh"
43 #include "G4PhysicalConstants.hh" <<
44 #include "G4SystemOfUnits.hh" <<
45 #include "G4LogLogInterpolation.hh" <<
46 #include "G4CompositeEMDataSet.hh" <<
47 #include "G4AutoLock.hh" <<
48 31
49 //....oooOO0OOooo........oooOO0OOooo........oo 32 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
50 33
51 using namespace std; 34 using namespace std;
52 namespace { G4Mutex LivermorePolarizedRayleigh <<
53 35
54 //....oooOO0OOooo........oooOO0OOooo........oo 36 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
55 37
56 G4PhysicsFreeVector* G4LivermorePolarizedRayle <<
57 G4PhysicsFreeVector* G4LivermorePolarizedRayle <<
58 <<
59 G4LivermorePolarizedRayleighModel::G4Livermore 38 G4LivermorePolarizedRayleighModel::G4LivermorePolarizedRayleighModel(const G4ParticleDefinition*,
60 const G4String& nam) << 39 const G4String& nam)
61 :G4VEmModel(nam),fParticleChange(nullptr),is << 40 :G4VEmModel(nam),isInitialised(false)
62 { 41 {
63 lowEnergyLimit = 250 * CLHEP::eV; << 42 lowEnergyLimit = 250 * eV; // SI - Could be 10 eV ?
>> 43 highEnergyLimit = 100 * GeV;
>> 44
>> 45 SetLowEnergyLimit(lowEnergyLimit);
>> 46 SetHighEnergyLimit(highEnergyLimit);
64 // 47 //
65 verboseLevel= 0; 48 verboseLevel= 0;
66 // Verbosity scale: 49 // Verbosity scale:
67 // 0 = nothing 50 // 0 = nothing
68 // 1 = warning for energy non-conservation 51 // 1 = warning for energy non-conservation
69 // 2 = details of energy budget 52 // 2 = details of energy budget
70 // 3 = calculation of cross sections, file o 53 // 3 = calculation of cross sections, file openings, sampling of atoms
71 // 4 = entering in methods 54 // 4 = entering in methods
72 55
73 if(verboseLevel > 0) { << 56 G4cout << "Livermore Polarized Rayleigh is constructed " << G4endl
74 G4cout << "Livermore Polarized Rayleigh is << 57 << "Energy range: "
75 << "Energy range: " << LowEnergyLim << 58 << lowEnergyLimit / keV << " keV - "
76 << HighEnergyLimit() / CLHEP::GeV << " Ge << 59 << highEnergyLimit / GeV << " GeV"
77 << G4endl; << 60 << G4endl;
78 } <<
79 } 61 }
80 62
81 //....oooOO0OOooo........oooOO0OOooo........oo 63 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
82 64
83 G4LivermorePolarizedRayleighModel::~G4Livermor 65 G4LivermorePolarizedRayleighModel::~G4LivermorePolarizedRayleighModel()
84 { 66 {
85 if(IsMaster()) { << 67 delete crossSectionHandler;
86 for(G4int i=0; i<maxZ; ++i) { << 68 delete formFactorData;
87 if(dataCS[i]) { <<
88 delete dataCS[i]; <<
89 dataCS[i] = nullptr; <<
90 delete formFactorData[i]; <<
91 formFactorData[i] = nullptr; <<
92 } <<
93 } <<
94 } <<
95 } 69 }
96 70
97 //....oooOO0OOooo........oooOO0OOooo........oo 71 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
98 72
99 void G4LivermorePolarizedRayleighModel::Initia 73 void G4LivermorePolarizedRayleighModel::Initialise(const G4ParticleDefinition* particle,
100 const G 74 const G4DataVector& cuts)
101 { 75 {
102 // Rayleigh process: Th << 76 // Rayleigh process: The Quantum Theory of Radiation
103 // W. << 77 // W. Heitler, Oxford at the Clarendon Press, Oxford (1954)
104 // Scattering function: A << 78 // Scattering function: A simple model of photon transport
105 // D. << 79 // D.E. Cullen, Nucl. Instr. Meth. in Phys. Res. B 101 (1995) 499-510
106 // Polarization of the outcoming photon: Be << 80 // 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- << 81 // T. Mizuno et al., Nucl. Instr. Meth. in Phys. Res. A 540 (2005) 158-168
108 // T. << 82
109 if (verboseLevel > 3) 83 if (verboseLevel > 3)
110 G4cout << "Calling G4LivermorePolarizedRay 84 G4cout << "Calling G4LivermorePolarizedRayleighModel::Initialise()" << G4endl;
111 85
112 if(IsMaster()) { << 86 InitialiseElementSelectors(particle,cuts);
113 <<
114 // Initialise element selector <<
115 InitialiseElementSelectors(particle, cuts) <<
116 <<
117 // Access to elements <<
118 const char* path = G4FindDataDir("G4LEDATA <<
119 auto elmTable = G4Element::GetElementTable <<
120 for (auto const & elm : *elmTable) { <<
121 G4int Z = std::min(elm->GetZasInt(), max <<
122 if( nullptr == dataCS[Z] ) { ReadData(Z, <<
123 } <<
124 } <<
125 <<
126 if(isInitialised) { return; } <<
127 fParticleChange = GetParticleChangeForGamma( <<
128 isInitialised = true; <<
129 } <<
130 <<
131 <<
132 //....oooOO0OOooo........oooOO0OOooo........oo <<
133 <<
134 void G4LivermorePolarizedRayleighModel::Initia <<
135 const G4ParticleDefinition*, G <<
136 { <<
137 SetElementSelectors(masterModel->GetElementS <<
138 } <<
139 87
140 //....oooOO0OOooo........oooOO0OOooo........oo << 88 // Energy limits
141 <<
142 void G4LivermorePolarizedRayleighModel::ReadDa <<
143 { <<
144 if (verboseLevel > 1) { <<
145 G4cout << "Calling ReadData() of G4Livermo <<
146 << G4endl; <<
147 } <<
148 <<
149 if(nullptr != dataCS[Z]) { return; } <<
150 <<
151 const char* datadir = path; <<
152 89
153 if(nullptr == datadir) << 90 if (LowEnergyLimit() < lowEnergyLimit)
154 { 91 {
155 datadir = G4FindDataDir("G4LEDATA"); << 92 G4cout << "G4LivermorePolarizedRayleighModel: low energy limit increased from " <<
156 if(nullptr == datadir) << 93 LowEnergyLimit()/eV << " eV to " << lowEnergyLimit << " eV" << G4endl;
157 { << 94 SetLowEnergyLimit(lowEnergyLimit);
158 G4Exception("G4LivermoreRayleighModelModel <<
159 FatalException, <<
160 "Environment variable G4LEDATA not d <<
161 return; <<
162 } <<
163 } 95 }
164 dataCS[Z] = new G4PhysicsFreeVector(); << 96 if (HighEnergyLimit() > highEnergyLimit)
165 formFactorData[Z] = new G4PhysicsFreeVector( << 97 {
166 << 98 G4cout << "G4LivermorePolarizedRayleighModel: high energy limit decreased from " <<
167 std::ostringstream ostCS; << 99 HighEnergyLimit()/GeV << " GeV to " << highEnergyLimit << " GeV" << G4endl;
168 ostCS << datadir << "/livermore/rayl/re-cs-" << 100 SetHighEnergyLimit(highEnergyLimit);
169 std::ifstream finCS(ostCS.str().c_str()); <<
170 <<
171 if( !finCS .is_open() ) { <<
172 G4ExceptionDescription ed; <<
173 ed << "G4LivermorePolarizedRayleighModel d <<
174 << "> is not opened!" << G4endl; <<
175 G4Exception("G4LivermorePolarizedRayleighM <<
176 FatalException, <<
177 ed,"G4LEDATA version should be G4EMLOW8.0 <<
178 return; <<
179 } else { <<
180 if(verboseLevel > 3) { <<
181 G4cout << "File " << ostCS.str() <<
182 << " is opened by G4LivermoreRayleighMo <<
183 } 101 }
184 dataCS[Z]->Retrieve(finCS, true); << 102
185 } << 103 // Read data files for all materials
186 104
187 std::ostringstream ostFF; << 105 crossSectionHandler = new G4CrossSectionHandler;
188 ostFF << datadir << "/livermore/rayl/re-ff-" << 106 crossSectionHandler->Clear();
189 std::ifstream finFF(ostFF.str().c_str()); << 107 G4String crossSectionFile = "rayl/re-cs-";
190 << 108 crossSectionHandler->LoadData(crossSectionFile);
191 if( !finFF.is_open() ) { << 109
192 G4ExceptionDescription ed; << 110 G4VDataSetAlgorithm* ffInterpolation = new G4LogLogInterpolation;
193 ed << "G4LivermorePolarizedRayleighModel d << 111 G4String formFactorFile = "rayl/re-ff-";
194 << "> is not opened!" << G4endl; << 112 formFactorData = new G4CompositeEMDataSet(ffInterpolation,1.,1.);
195 G4Exception("G4LivermorePolarizedRayleighM << 113 formFactorData->LoadData(formFactorFile);
196 FatalException, << 114
197 ed,"G4LEDATA version should be G4EMLOW8.0 << 115 //
198 return; << 116 if (verboseLevel > 2)
199 } else { << 117 G4cout << "Loaded cross section files for Livermore Polarized Rayleigh model" << G4endl;
200 if(verboseLevel > 3) { << 118
201 G4cout << "File " << ostFF.str() << 119 G4cout << "Livermore Polarized Rayleigh model is initialized " << G4endl
202 << " is opened by G4LivermoreRa << 120 << "Energy range: "
203 } << 121 << LowEnergyLimit() / keV << " keV - "
204 formFactorData[Z]->Retrieve(finFF, true); << 122 << HighEnergyLimit() / GeV << " GeV"
205 } << 123 << G4endl;
>> 124
>> 125 if(isInitialised) return;
>> 126
>> 127 if(pParticleChange)
>> 128 fParticleChange = reinterpret_cast<G4ParticleChangeForGamma*>(pParticleChange);
>> 129 else
>> 130 fParticleChange = new G4ParticleChangeForGamma();
>> 131
>> 132 isInitialised = true;
206 } 133 }
207 << 134
208 //....oooOO0OOooo........oooOO0OOooo........oo 135 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
209 << 136
210 G4double G4LivermorePolarizedRayleighModel::Co 137 G4double G4LivermorePolarizedRayleighModel::ComputeCrossSectionPerAtom(
211 const << 138 const G4ParticleDefinition*,
212 G4double GammaEnergy, << 139 G4double GammaEnergy,
213 G4double Z, G4double, << 140 G4double Z, G4double,
214 G4double, G4double) << 141 G4double, G4double)
215 { 142 {
216 if (verboseLevel > 1) { << 143 if (verboseLevel > 3)
217 G4cout << "G4LivermoreRayleighModel::Compu << 144 G4cout << "Calling CrossSectionPerAtom() of G4LivermorePolarizedRayleighModel" << G4endl;
218 << G4endl; << 145
219 } << 146 G4double cs = crossSectionHandler->FindValue(G4int(Z), GammaEnergy);
220 << 147 return cs;
221 if(GammaEnergy < lowEnergyLimit) { return 0. <<
222 <<
223 G4double xs = 0.0; <<
224 <<
225 G4int intZ = G4lrint(Z); <<
226 if(intZ < 1 || intZ > maxZ) { return xs; } <<
227 <<
228 G4PhysicsFreeVector* pv = dataCS[intZ]; <<
229 <<
230 // if element was not initialised <<
231 // do initialisation safely for MT mode <<
232 if(nullptr == pv) { <<
233 InitialiseForElement(0, intZ); <<
234 pv = dataCS[intZ]; <<
235 if(nullptr == pv) { return xs; } <<
236 } <<
237 <<
238 G4int n = G4int(pv->GetVectorLength() - 1); <<
239 G4double e = GammaEnergy/MeV; <<
240 if(e >= pv->Energy(n)) { <<
241 xs = (*pv)[n]/(e*e); <<
242 } else if(e >= pv->Energy(0)) { <<
243 xs = pv->Value(e)/(e*e); <<
244 } <<
245 return xs; <<
246 } 148 }
247 149
248 //....oooOO0OOooo........oooOO0OOooo........oo 150 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
249 151
250 void G4LivermorePolarizedRayleighModel::Sample << 152 void G4LivermorePolarizedRayleighModel::SampleSecondaries(std::vector<G4DynamicParticle*>* /*fvect*/,
251 std::vector<G4DynamicParticle* << 153 const G4MaterialCutsCouple* couple,
252 const G4MaterialCutsCouple* couple, << 154 const G4DynamicParticle* aDynamicGamma,
253 const G4DynamicParticle* aDynamicGamma, << 155 G4double,
254 G4double, G4double) << 156 G4double)
255 { 157 {
256 if (verboseLevel > 3) 158 if (verboseLevel > 3)
257 G4cout << "Calling SampleSecondaries() of 159 G4cout << "Calling SampleSecondaries() of G4LivermorePolarizedRayleighModel" << G4endl;
258 160
259 G4double photonEnergy0 = aDynamicGamma->GetK 161 G4double photonEnergy0 = aDynamicGamma->GetKineticEnergy();
260 162
261 if (photonEnergy0 <= lowEnergyLimit) 163 if (photonEnergy0 <= lowEnergyLimit)
262 { 164 {
263 fParticleChange->ProposeTrackStatus(fStopA << 165 fParticleChange->ProposeTrackStatus(fStopAndKill);
264 fParticleChange->SetProposedKineticEnergy( << 166 fParticleChange->SetProposedKineticEnergy(0.);
265 fParticleChange->ProposeLocalEnergyDeposit << 167 fParticleChange->ProposeLocalEnergyDeposit(photonEnergy0);
266 return; << 168 // SI - IS THE FOLLOWING RETURN NECESSARY ?
>> 169 return ;
267 } 170 }
268 171
269 G4ParticleMomentum photonDirection0 = aDynam 172 G4ParticleMomentum photonDirection0 = aDynamicGamma->GetMomentumDirection();
270 173
271 // Select randomly one element in the curren 174 // Select randomly one element in the current material
272 const G4ParticleDefinition* particle = aDyn << 175 G4int Z = crossSectionHandler->SelectRandomAtom(couple,photonEnergy0);
273 const G4Element* elm = SelectRandomAtom(coup <<
274 G4int Z = elm->GetZasInt(); <<
275 176
276 G4double outcomingPhotonCosTheta = GenerateC 177 G4double outcomingPhotonCosTheta = GenerateCosTheta(photonEnergy0, Z);
277 G4double outcomingPhotonPhi = GeneratePhi(ou 178 G4double outcomingPhotonPhi = GeneratePhi(outcomingPhotonCosTheta);
278 G4double beta = GeneratePolarizationAngle(); << 179 G4double beta=GeneratePolarizationAngle();
279 180
280 // incomingPhoton reference frame: 181 // incomingPhoton reference frame:
281 // z = versor parallel to the incomingPhoton 182 // z = versor parallel to the incomingPhotonDirection
282 // x = versor parallel to the incomingPhoton 183 // x = versor parallel to the incomingPhotonPolarization
283 // y = defined as z^x 184 // y = defined as z^x
284 185
285 // outgoingPhoton reference frame: 186 // outgoingPhoton reference frame:
286 // z' = versor parallel to the outgoingPhoto 187 // z' = versor parallel to the outgoingPhotonDirection
287 // x' = defined as x-x*z'z' normalized 188 // x' = defined as x-x*z'z' normalized
288 // y' = defined as z'^x' << 189 // y' = defined as z'^x'
>> 190
289 G4ThreeVector z(aDynamicGamma->GetMomentumDi 191 G4ThreeVector z(aDynamicGamma->GetMomentumDirection().unit());
290 G4ThreeVector x(GetPhotonPolarization(*aDyna 192 G4ThreeVector x(GetPhotonPolarization(*aDynamicGamma));
291 G4ThreeVector y(z.cross(x)); 193 G4ThreeVector y(z.cross(x));
292 194
293 // z' = std::cos(phi)*std::sin(theta) << 195 // 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; 196 G4double xDir;
296 G4double yDir; 197 G4double yDir;
297 G4double zDir; 198 G4double zDir;
298 zDir=outcomingPhotonCosTheta; 199 zDir=outcomingPhotonCosTheta;
299 xDir=std::sqrt(1-outcomingPhotonCosTheta*out 200 xDir=std::sqrt(1-outcomingPhotonCosTheta*outcomingPhotonCosTheta);
300 yDir=xDir; 201 yDir=xDir;
301 xDir*=std::cos(outcomingPhotonPhi); 202 xDir*=std::cos(outcomingPhotonPhi);
302 yDir*=std::sin(outcomingPhotonPhi); 203 yDir*=std::sin(outcomingPhotonPhi);
303 204
304 G4ThreeVector zPrime((xDir*x + yDir*y + zDir 205 G4ThreeVector zPrime((xDir*x + yDir*y + zDir*z).unit());
305 G4ThreeVector xPrime(x.perpPart(zPrime).unit 206 G4ThreeVector xPrime(x.perpPart(zPrime).unit());
306 G4ThreeVector yPrime(zPrime.cross(xPrime)); 207 G4ThreeVector yPrime(zPrime.cross(xPrime));
307 208
308 // outgoingPhotonPolarization is directed as << 209 // 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 210 G4ThreeVector outcomingPhotonPolarization(xPrime*std::cos(beta) + yPrime*std::sin(beta));
311 211
312 fParticleChange->ProposeMomentumDirection(zP 212 fParticleChange->ProposeMomentumDirection(zPrime);
313 fParticleChange->ProposePolarization(outcomi 213 fParticleChange->ProposePolarization(outcomingPhotonPolarization);
314 fParticleChange->SetProposedKineticEnergy(ph 214 fParticleChange->SetProposedKineticEnergy(photonEnergy0);
>> 215
315 } 216 }
316 217
317 //....oooOO0OOooo........oooOO0OOooo........oo 218 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
318 219
319 G4double G4LivermorePolarizedRayleighModel::Ge << 220 G4double G4LivermorePolarizedRayleighModel::GenerateCosTheta(G4double incomingPhotonEnergy, G4int zAtom) const
320 { 221 {
321 // d sigma 222 // d sigma k0
322 // --------- = r0^2 * pi * F^2(x, Z) * ( 2 223 // --------- = r0^2 * pi * F^2(x, Z) * ( 2 - sin^2 theta) * std::sin (theta), x = ---- std::sin(theta/2)
323 // d theta 224 // d theta hc
324 225
325 // d sigma 226 // d sigma k0 1 - y
326 // --------- = r0^2 * pi * F^2(x, Z) * ( 1 + 227 // --------- = r0^2 * pi * F^2(x, Z) * ( 1 + y^2), x = ---- std::sqrt ( ------- ), y = std::cos(theta)
327 // d y 228 // d y hc 2
328 229
329 // Z 230 // Z
330 // F(x, Z) ~ -------- 231 // F(x, Z) ~ --------
331 // a + bx 232 // a + bx
332 // 233 //
333 // The time to exit from the outer loop grow 234 // The time to exit from the outer loop grows as ~ k0
334 // On pcgeant2 the time is ~ 1 s for k0 ~ 1 235 // On pcgeant2 the time is ~ 1 s for k0 ~ 1 MeV on the oxygen element. A 100 GeV
335 // event will take ~ 10 hours. 236 // event will take ~ 10 hours.
336 // 237 //
337 // On the avarage the inner loop does 1.5 it 238 // On the avarage the inner loop does 1.5 iterations before exiting
338 const G4double xxfact = CLHEP::cm/(CLHEP::h_ << 239
339 const G4double xFactor = incomingPhotonEnerg << 240 const G4double xFactor = (incomingPhotonEnergy*cm)/(h_Planck*c_light);
>> 241 //const G4VEMDataSet * formFactorData = GetScatterFunctionData();
340 242
341 G4double cosTheta; 243 G4double cosTheta;
342 G4double fCosTheta; 244 G4double fCosTheta;
343 G4double x; 245 G4double x;
344 G4double fValue; 246 G4double fValue;
345 247
346 if (incomingPhotonEnergy > 5.*CLHEP::MeV) << 248 do
347 { <<
348 cosTheta = 1.; <<
349 } <<
350 else <<
351 { <<
352 do <<
353 { 249 {
354 do 250 do
355 { 251 {
356 cosTheta = 2.*G4UniformRand()-1.; 252 cosTheta = 2.*G4UniformRand()-1.;
357 fCosTheta = (1.+cosTheta*cosTheta)/2.; 253 fCosTheta = (1.+cosTheta*cosTheta)/2.;
358 } 254 }
359 while (fCosTheta < G4UniformRand()); 255 while (fCosTheta < G4UniformRand());
360 256
361 x = xFactor*std::sqrt((1.-cosTheta)/2.); 257 x = xFactor*std::sqrt((1.-cosTheta)/2.);
362 258
363 if (x > 1.e+005) 259 if (x > 1.e+005)
364 fValue = formFactorData[Z]->Value(x); << 260 fValue = formFactorData->FindValue(x, zAtom-1);
365 else 261 else
366 fValue = formFactorData[Z]->Value(0.); << 262 fValue = formFactorData->FindValue(0., zAtom-1);
367 263
368 fValue /= Z; << 264 fValue/=zAtom;
369 fValue *= fValue; << 265 fValue*=fValue;
370 } 266 }
371 while(fValue < G4UniformRand()); << 267 while(fValue < G4UniformRand());
372 } <<
373 268
374 return cosTheta; 269 return cosTheta;
375 } 270 }
376 271
377 //....oooOO0OOooo........oooOO0OOooo........oo 272 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
378 273
379 G4double G4LivermorePolarizedRayleighModel::Ge 274 G4double G4LivermorePolarizedRayleighModel::GeneratePhi(G4double cosTheta) const
380 { 275 {
381 // d sigma 276 // d sigma
382 // --------- = alpha * ( 1 - sin^2 (theta) * 277 // --------- = alpha * ( 1 - sin^2 (theta) * cos^2 (phi) )
383 // d phi 278 // d phi
384 279
385 // On the average the loop takes no more tha 280 // On the average the loop takes no more than 2 iterations before exiting
386 281
387 G4double phi; 282 G4double phi;
388 G4double cosPhi; 283 G4double cosPhi;
389 G4double phiProbability; 284 G4double phiProbability;
390 G4double sin2Theta; 285 G4double sin2Theta;
391 286
392 sin2Theta=1.-cosTheta*cosTheta; 287 sin2Theta=1.-cosTheta*cosTheta;
393 288
394 do 289 do
395 { 290 {
396 phi = CLHEP::twopi * G4UniformRand(); << 291 phi = twopi * G4UniformRand();
397 cosPhi = std::cos(phi); 292 cosPhi = std::cos(phi);
398 phiProbability= 1. - sin2Theta*cosPhi*co 293 phiProbability= 1. - sin2Theta*cosPhi*cosPhi;
399 } 294 }
400 while (phiProbability < G4UniformRand()); 295 while (phiProbability < G4UniformRand());
401 296
402 return phi; 297 return phi;
403 } 298 }
404 299
405 //....oooOO0OOooo........oooOO0OOooo........oo 300 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
406 301
407 G4double G4LivermorePolarizedRayleighModel::Ge 302 G4double G4LivermorePolarizedRayleighModel::GeneratePolarizationAngle(void) const
408 { 303 {
409 // Rayleigh polarization is always on the x' 304 // Rayleigh polarization is always on the x' direction
>> 305
410 return 0; 306 return 0;
411 } 307 }
412 308
413 //....oooOO0OOooo........oooOO0OOooo........oo 309 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
414 310
415 G4ThreeVector G4LivermorePolarizedRayleighMode 311 G4ThreeVector G4LivermorePolarizedRayleighModel::GetPhotonPolarization(const G4DynamicParticle& photon)
416 { 312 {
417 // From G4VLowEnergyDiscretePhotonProcess.cc << 313
>> 314 // SI - From G4VLowEnergyDiscretePhotonProcess.cc
>> 315
418 G4ThreeVector photonMomentumDirection; 316 G4ThreeVector photonMomentumDirection;
419 G4ThreeVector photonPolarization; 317 G4ThreeVector photonPolarization;
420 318
421 photonPolarization = photon.GetPolarization( 319 photonPolarization = photon.GetPolarization();
422 photonMomentumDirection = photon.GetMomentum 320 photonMomentumDirection = photon.GetMomentumDirection();
423 321
424 if ((!photonPolarization.isOrthogonal(photon 322 if ((!photonPolarization.isOrthogonal(photonMomentumDirection, 1e-6)) || photonPolarization.mag()==0.)
425 { 323 {
426 // if |photonPolarization|==0. or |photo 324 // if |photonPolarization|==0. or |photonPolarization * photonDirection0| > 1e-6 * |photonPolarization ^ photonDirection0|
427 // then polarization is choosen randomly << 325 // then polarization is choosen randomly.
>> 326
428 G4ThreeVector e1(photonMomentumDirection 327 G4ThreeVector e1(photonMomentumDirection.orthogonal().unit());
429 G4ThreeVector e2(photonMomentumDirection 328 G4ThreeVector e2(photonMomentumDirection.cross(e1).unit());
430 329
431 G4double angle(G4UniformRand() * CLHEP:: << 330 G4double angle(G4UniformRand() * twopi);
432 331
433 e1*=std::cos(angle); 332 e1*=std::cos(angle);
434 e2*=std::sin(angle); 333 e2*=std::sin(angle);
435 334
436 photonPolarization=e1+e2; 335 photonPolarization=e1+e2;
437 } 336 }
438 else if (photonPolarization.howOrthogonal(ph 337 else if (photonPolarization.howOrthogonal(photonMomentumDirection) != 0.)
439 { 338 {
440 // if |photonPolarization * photonDirect 339 // if |photonPolarization * photonDirection0| != 0.
441 // then polarization is made orthonormal << 340 // then polarization is made orthonormal;
>> 341
442 photonPolarization=photonPolarization.pe 342 photonPolarization=photonPolarization.perpPart(photonMomentumDirection);
443 } 343 }
444 344
445 return photonPolarization.unit(); 345 return photonPolarization.unit();
446 } 346 }
447 347
448 //....oooOO0OOooo........oooOO0OOooo........oo <<
449 <<
450 void G4LivermorePolarizedRayleighModel::Initia <<
451 const G4ParticleDefinition*, G <<
452 { <<
453 G4AutoLock l(&LivermorePolarizedRayleighMode <<
454 if(nullptr == dataCS[Z]) { ReadData(Z); } <<
455 l.unlock(); <<
456 } <<
457 348