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26 // -------------------------------------------
27 // GEANT 4 class implementation file
28 //
29 // History: first implementation,
30 // 21-5-98 V.Grichine
31 // 28-05-01, V.Ivanchenko minor changes t
32 // 04.03.05, V.Grichine: get local field
33 // 19-05-06, V.Ivanchenko rename from G4S
34 //
35 //////////////////////////////////////////////
36
37 #include "G4SynchrotronRadiationInMat.hh"
38
39 #include "G4EmProcessSubType.hh"
40 #include "G4Field.hh"
41 #include "G4FieldManager.hh"
42 #include "G4Integrator.hh"
43 #include "G4PhysicalConstants.hh"
44 #include "G4PropagatorInField.hh"
45 #include "G4SystemOfUnits.hh"
46 #include "G4PhysicsModelCatalog.hh"
47
48 const G4double G4SynchrotronRadiationInMat::fI
49 1.000000e+00, 9.428859e-01, 9.094095e-01, 8.
50 8.337008e-01, 8.124961e-01, 7.925217e-01, 7.
51 7.381233e-01, 7.214521e-01, 7.053634e-01, 6.
52 6.600922e-01, 6.458793e-01, 6.320533e-01, 6.
53 5.926459e-01, 5.801347e-01, 5.679103e-01, 5.
54 5.328395e-01, 5.216482e-01, 5.106904e-01, 4.
55 4.791351e-01, 4.690316e-01, 4.591249e-01, 4.
56 4.305320e-01, 4.213608e-01, 4.123623e-01, 4.
57 3.863639e-01, 3.780179e-01, 3.698262e-01, 3.
58 3.461460e-01, 3.385411e-01, 3.310757e-01, 3.
59 3.094921e-01, 3.025605e-01, 2.957566e-01, 2.
60 2.760907e-01, 2.697773e-01, 2.635817e-01, 2.
61 2.456834e-01, 2.399409e-01, 2.343074e-01, 2.
62 2.180442e-01, 2.128303e-01, 2.077174e-01, 2.
63 1.929696e-01, 1.882457e-01, 1.836155e-01, 1.
64 1.702730e-01, 1.660036e-01, 1.618212e-01, 1.
65 1.497822e-01, 1.459344e-01, 1.421671e-01, 1.
66 1.313360e-01, 1.278785e-01, 1.244956e-01, 1.
67 1.147818e-01, 1.116850e-01, 1.086570e-01, 1.
68 9.997405e-02, 9.720975e-02, 9.450865e-02, 9.
69 8.677391e-02, 8.431501e-02, 8.191406e-02, 7.
70 7.504872e-02, 7.286944e-02, 7.074311e-02, 6.
71 6.467208e-02, 6.274790e-02, 6.087191e-02, 5.
72 5.552387e-02, 5.383150e-02, 5.218282e-02, 5.
73 4.749020e-02, 4.600763e-02, 4.456450e-02, 4.
74 4.046353e-02, 3.917002e-02, 3.791195e-02, 3.
75 3.434274e-02, 3.321884e-02, 3.212665e-02, 3.
76 2.903319e-02, 2.806076e-02, 2.711656e-02, 2.
77 2.444677e-02, 2.360897e-02, 2.279620e-02, 2.
78 2.050194e-02, 1.978324e-02, 1.908662e-02, 1.
79 1.712363e-02, 1.650979e-02, 1.591533e-02, 1.
80 1.424314e-02, 1.372117e-02, 1.321613e-02, 1.
81 1.179798e-02, 1.135611e-02, 1.092896e-02, 1.
82 9.731635e-03, 9.359254e-03, 8.999595e-03, 8.
83 7.993280e-03, 7.680879e-03, 7.379426e-03, 7.
84 6.537491e-03, 6.276605e-03, 6.025092e-03, 5.
85 5.323912e-03, 5.107045e-03, 4.898164e-03, 4.
86 4.316896e-03, 4.137454e-03, 3.964780e-03, 3.
87 3.485150e-03, 3.337364e-03, 3.195284e-03, 3.
88 2.801361e-03, 2.680213e-03, 2.563852e-03, 2.
89 };
90
91 //////////////////////////////////////////////
92 // Constructor
93 G4SynchrotronRadiationInMat::G4SynchrotronRadi
94 const G4String& processName, G4ProcessType t
95 : G4VDiscreteProcess(processName, type)
96 , theGamma(G4Gamma::Gamma())
97 , theElectron(G4Electron::Electron())
98 , thePositron(G4Positron::Positron())
99 , LowestKineticEnergy(10. * keV)
100 , fAlpha(0.0)
101 , fRootNumber(80)
102 , fVerboseLevel(verboseLevel)
103 {
104 G4TransportationManager* transportMgr =
105 G4TransportationManager::GetTransportation
106
107 fFieldPropagator = transportMgr->GetPropagat
108 secID = G4PhysicsModelCatalog::GetModelID("m
109 SetProcessSubType(fSynchrotronRadiation);
110 CutInRange = GammaCutInKineticEnergyNow = El
111 PositronCutInKineticEnergyNow = ParticleCu
112 fPsiGamma = fEta = fOrderAngleK = 0.0;
113 }
114
115 //////////////////////////////////////////////
116 // Destructor
117 G4SynchrotronRadiationInMat::~G4SynchrotronRad
118
119 G4bool G4SynchrotronRadiationInMat::IsApplicab
120 const G4ParticleDefinition& particle)
121 {
122 return ((&particle == (const G4ParticleDefin
123 (&particle == (const G4ParticleDefin
124 }
125
126 G4double G4SynchrotronRadiationInMat::GetLambd
127
128 G4double G4SynchrotronRadiationInMat::GetEnerg
129
130 // Production of synchrotron X-ray photon
131 // Geant4 internal units.
132 G4double G4SynchrotronRadiationInMat::GetMeanF
133 const G4Track& trackData, G4double, G4ForceC
134 {
135 // gives the MeanFreePath in GEANT4 internal
136 G4double MeanFreePath;
137
138 const G4DynamicParticle* aDynamicParticle =
139
140 *condition = NotForced;
141
142 G4double gamma =
143 aDynamicParticle->GetTotalEnergy() / aDyna
144
145 G4double particleCharge = aDynamicParticle->
146
147 G4double KineticEnergy = aDynamicParticle->G
148
149 if(KineticEnergy < LowestKineticEnergy || ga
150 MeanFreePath = DBL_MAX;
151 else
152 {
153 G4ThreeVector FieldValue;
154 const G4Field* pField = nullptr;
155
156 G4FieldManager* fieldMgr = nullptr;
157 G4bool fieldExertsForce = false;
158
159 if((particleCharge != 0.0))
160 {
161 fieldMgr =
162 fFieldPropagator->FindAndSetFieldManag
163
164 if(fieldMgr != nullptr)
165 {
166 // If the field manager has no field,
167 fieldExertsForce = (fieldMgr->GetDetec
168 }
169 }
170 if(fieldExertsForce)
171 {
172 pField = fieldMgr->G
173 G4ThreeVector globPosition = trackData.G
174
175 G4double globPosVec[4], FieldValueVec[6]
176
177 globPosVec[0] = globPosition.x();
178 globPosVec[1] = globPosition.y();
179 globPosVec[2] = globPosition.z();
180 globPosVec[3] = trackData.GetGlobalTime(
181
182 pField->GetFieldValue(globPosVec, FieldV
183
184 FieldValue =
185 G4ThreeVector(FieldValueVec[0], FieldV
186
187 G4ThreeVector unitMomentum = aDynamicPar
188 G4ThreeVector unitMcrossB = FieldValue.
189 G4double perpB = unitMcrossB
190 G4double beta = aDynamicPar
191 (aDynamicParticle->GetTo
192
193 if(perpB > 0.0)
194 MeanFreePath = fLambdaConst * beta / p
195 else
196 MeanFreePath = DBL_MAX;
197 }
198 else
199 MeanFreePath = DBL_MAX;
200 }
201 if(fVerboseLevel > 0)
202 {
203 G4cout << "G4SynchrotronRadiationInMat::Me
204 << " m" << G4endl;
205 }
206 return MeanFreePath;
207 }
208
209 //////////////////////////////////////////////
210 G4VParticleChange* G4SynchrotronRadiationInMat
211 const G4Track& trackData, const G4Step& step
212
213 {
214 aParticleChange.Initialize(trackData);
215
216 const G4DynamicParticle* aDynamicParticle =
217
218 G4double gamma =
219 aDynamicParticle->GetTotalEnergy() / (aDyn
220
221 if(gamma <= 1.0e3)
222 {
223 return G4VDiscreteProcess::PostStepDoIt(tr
224 }
225 G4double particleCharge = aDynamicParticle->
226
227 G4ThreeVector FieldValue;
228 const G4Field* pField = nullptr;
229
230 G4FieldManager* fieldMgr = nullptr;
231 G4bool fieldExertsForce = false;
232
233 if((particleCharge != 0.0))
234 {
235 fieldMgr = fFieldPropagator->FindAndSetFie
236 if(fieldMgr != nullptr)
237 {
238 // If the field manager has no field, th
239 fieldExertsForce = (fieldMgr->GetDetecto
240 }
241 }
242 if(fieldExertsForce)
243 {
244 pField = fieldMgr->Get
245 G4ThreeVector globPosition = trackData.Get
246 G4double globPosVec[4], FieldValueVec[6];
247 globPosVec[0] = globPosition.x();
248 globPosVec[1] = globPosition.y();
249 globPosVec[2] = globPosition.z();
250 globPosVec[3] = trackData.GetGlobalTime();
251
252 pField->GetFieldValue(globPosVec, FieldVal
253 FieldValue =
254 G4ThreeVector(FieldValueVec[0], FieldVal
255
256 G4ThreeVector unitMomentum = aDynamicParti
257 G4ThreeVector unitMcrossB = FieldValue.cr
258 G4double perpB = unitMcrossB.m
259 if(perpB > 0.0)
260 {
261 // M-C of synchrotron photon energy
262 G4double energyOfSR = GetRandomEnergySR(
263
264 if(fVerboseLevel > 0)
265 {
266 G4cout << "SR photon energy = " << ene
267 }
268
269 // check against insufficient energy
270 if(energyOfSR <= 0.0)
271 {
272 return G4VDiscreteProcess::PostStepDoI
273 }
274 G4double kineticEnergy = aDynamicParticl
275 G4ParticleMomentum particleDirection =
276 aDynamicParticle->GetMomentumDirection
277
278 // M-C of its direction, simplified dipo
279 G4double cosTheta, sinTheta, fcos, beta;
280
281 do
282 {
283 cosTheta = 1. - 2. * G4UniformRand();
284 fcos = (1 + cosTheta * cosTheta) *
285 }
286 // Loop checking, 07-Aug-2015, Vladimir
287 while(fcos < G4UniformRand());
288
289 beta = std::sqrt(1. - 1. / (gamma * gamm
290
291 cosTheta = (cosTheta + beta) / (1. + bet
292
293 if(cosTheta > 1.)
294 cosTheta = 1.;
295 if(cosTheta < -1.)
296 cosTheta = -1.;
297
298 sinTheta = std::sqrt(1. - cosTheta * cos
299
300 G4double Phi = twopi * G4UniformRand();
301
302 G4double dirx = sinTheta * std::cos(Phi)
303 G4double diry = sinTheta * std::sin(Phi)
304 G4double dirz = cosTheta;
305
306 G4ThreeVector gammaDirection(dirx, diry,
307 gammaDirection.rotateUz(particleDirectio
308
309 // polarization of new gamma
310 G4ThreeVector gammaPolarization = FieldV
311 gammaPolarization = gammaP
312
313 // create G4DynamicParticle object for t
314 auto aGamma =
315 new G4DynamicParticle(G4Gamma::Gamma()
316 aGamma->SetPolarization(gammaPolarizatio
317 gammaPolarizatio
318
319 aParticleChange.SetNumberOfSecondaries(1
320
321 // Update the incident particle
322 G4double newKinEnergy = kineticEnergy -
323
324 if(newKinEnergy > 0.)
325 {
326 aParticleChange.ProposeMomentumDirecti
327 aParticleChange.ProposeEnergy(newKinEn
328 aParticleChange.ProposeLocalEnergyDepo
329 }
330 else
331 {
332 aParticleChange.ProposeEnergy(0.);
333 aParticleChange.ProposeLocalEnergyDepo
334 G4double charge = aDynamicParticle->Ge
335 if(charge < 0.)
336 {
337 aParticleChange.ProposeTrackStatus(f
338 }
339 else
340 {
341 aParticleChange.ProposeTrackStatus(f
342 }
343 }
344
345 // Create the G4Track
346 G4Track* aSecondaryTrack = new G4Track(a
347 aSecondaryTrack->SetTouchableHandle(step
348 aSecondaryTrack->SetParentID(trackData.G
349 aSecondaryTrack->SetCreatorModelID(secID
350 aParticleChange.AddSecondary(aSecondaryT
351 }
352 else
353 {
354 return G4VDiscreteProcess::PostStepDoIt(
355 }
356 }
357 return G4VDiscreteProcess::PostStepDoIt(trac
358 }
359
360 G4double G4SynchrotronRadiationInMat::GetPhoto
361
362 {
363 G4int i;
364 G4double energyOfSR = -1.0;
365
366 const G4DynamicParticle* aDynamicParticle =
367
368 G4double gamma =
369 aDynamicParticle->GetTotalEnergy() / (aDyn
370
371 G4double particleCharge = aDynamicParticle->
372
373 G4ThreeVector FieldValue;
374 const G4Field* pField = nullptr;
375
376 G4FieldManager* fieldMgr = nullptr;
377 G4bool fieldExertsForce = false;
378
379 if((particleCharge != 0.0))
380 {
381 fieldMgr = fFieldPropagator->FindAndSetFie
382 if(fieldMgr != nullptr)
383 {
384 // If the field manager has no field, th
385 fieldExertsForce = (fieldMgr->GetDetecto
386 }
387 }
388 if(fieldExertsForce)
389 {
390 pField = fieldMgr->Get
391 G4ThreeVector globPosition = trackData.Get
392 G4double globPosVec[3], FieldValueVec[3];
393
394 globPosVec[0] = globPosition.x();
395 globPosVec[1] = globPosition.y();
396 globPosVec[2] = globPosition.z();
397
398 pField->GetFieldValue(globPosVec, FieldVal
399 FieldValue =
400 G4ThreeVector(FieldValueVec[0], FieldVal
401
402 G4ThreeVector unitMomentum = aDynamicParti
403 G4ThreeVector unitMcrossB = FieldValue.cr
404 G4double perpB = unitMcrossB.m
405 if(perpB > 0.0)
406 {
407 // M-C of synchrotron photon energy
408 G4double random = G4UniformRand();
409 for(i = 0; i < 200; ++i)
410 {
411 if(random >= fIntegralProbabilityOfSR[
412 break;
413 }
414 energyOfSR = 0.0001 * i * i * fEnergyCon
415
416 // check against insufficient energy
417 if(energyOfSR <= 0.0)
418 {
419 return -1.0;
420 }
421 }
422 else
423 {
424 return -1.0;
425 }
426 }
427 return energyOfSR;
428 }
429
430 //////////////////////////////////////////////
431 G4double G4SynchrotronRadiationInMat::GetRando
432
433 {
434 G4int i;
435 static constexpr G4int iMax = 200;
436 G4double energySR, random, position;
437
438 random = G4UniformRand();
439
440 for(i = 0; i < iMax; ++i)
441 {
442 if(random >= fIntegralProbabilityOfSR[i])
443 break;
444 }
445 if(i <= 0)
446 position = G4UniformRand();
447 else if(i >= iMax)
448 position = G4double(iMax);
449 else
450 position = i + G4UniformRand();
451
452 energySR =
453 0.0001 * position * position * fEnergyCons
454
455 if(energySR < 0.)
456 energySR = 0.;
457
458 return energySR;
459 }
460
461 //////////////////////////////////////////////
462 G4double G4SynchrotronRadiationInMat::GetProbS
463 {
464 G4double result, hypCos2, hypCos = std::cosh
465
466 hypCos2 = hypCos * hypCos;
467 result = std::cosh(5. * t / 3.) * std::exp(t
468 result /= hypCos2;
469 return result;
470 }
471
472 //////////////////////////////////////////////
473 // return the probability to emit SR photon wi
474 // energy/energy_c >= ksi
475 // for ksi <= 0. P = 1., however the method wo
476 G4double G4SynchrotronRadiationInMat::GetIntPr
477 {
478 if(ksi <= 0.)
479 return 1.0;
480 fKsi = ksi; // should be > 0. !
481 G4int n;
482 G4double result, a;
483
484 a = fAlpha; // always = 0.
485 n = fRootNumber; // around default = 80
486
487 G4Integrator<G4SynchrotronRadiationInMat,
488 G4double (G4SynchrotronRadiatio
489 integral;
490
491 result = integral.Laguerre(
492 this, &G4SynchrotronRadiationInMat::GetPro
493
494 result *= 3. / 5. / pi;
495
496 return result;
497 }
498
499 //////////////////////////////////////////////
500 // return an auxiliary function for K_5/3 inte
501 G4double G4SynchrotronRadiationInMat::GetProbS
502 {
503 G4double result, hypCos = std::cosh(t);
504
505 result = std::cosh(5. * t / 3.) * std::exp(t
506 result /= hypCos;
507 return result;
508 }
509
510 //////////////////////////////////////////////
511 // return the probability to emit SR photon en
512 // energy/energy_c >= ksi
513 // for ksi <= 0. P = 1., however the method wo
514 G4double G4SynchrotronRadiationInMat::GetEnerg
515 {
516 if(ksi <= 0.)
517 return 1.0;
518 fKsi = ksi; // should be > 0. !
519 G4int n;
520 G4double result, a;
521
522 a = fAlpha; // always = 0.
523 n = fRootNumber; // around default = 80
524
525 G4Integrator<G4SynchrotronRadiationInMat,
526 G4double (G4SynchrotronRadiatio
527 integral;
528
529 result = integral.Laguerre(
530 this, &G4SynchrotronRadiationInMat::GetPro
531
532 result *= 9. * std::sqrt(3.) * ksi / 8. / pi
533
534 return result;
535 }
536
537 //////////////////////////////////////////////
538 G4double G4SynchrotronRadiationInMat::GetInteg
539 {
540 G4double result, hypCos = std::cosh(t);
541
542 result =
543 std::cosh(fOrderAngleK * t) * std::exp(t -
544 result /= hypCos;
545 return result;
546 }
547
548 //////////////////////////////////////////////
549 // Return K 1/3 or 2/3 for angular distributio
550 G4double G4SynchrotronRadiationInMat::GetAngle
551 {
552 fEta = eta; // should be > 0. !
553 G4int n;
554 G4double result, a;
555
556 a = fAlpha; // always = 0.
557 n = fRootNumber; // around default = 80
558
559 G4Integrator<G4SynchrotronRadiationInMat,
560 G4double (G4SynchrotronRadiatio
561 integral;
562
563 result = integral.Laguerre(
564 this, &G4SynchrotronRadiationInMat::GetInt
565
566 return result;
567 }
568
569 //////////////////////////////////////////////
570 // Relative angle diff distribution for given
571 G4double G4SynchrotronRadiationInMat::GetAngle
572 {
573 G4double result, funK, funK2, gpsi2 = gpsi *
574
575 fPsiGamma = gpsi;
576 fEta = 0.5 * fKsi * (1. + gpsi2) * std:
577
578 fOrderAngleK = 1. / 3.;
579 funK = GetAngleK(fEta);
580 funK2 = funK * funK;
581
582 result = gpsi2 * funK2 / (1. + gpsi2);
583
584 fOrderAngleK = 2. / 3.;
585 funK = GetAngleK(fEta);
586 funK2 = funK * funK;
587
588 result += funK2;
589 result *= (1. + gpsi2) * fKsi;
590
591 return result;
592 }
593