source: trunk/source/processes/electromagnetic/utils/include/G4VMultipleScattering.hh@ 1089

Last change on this file since 1089 was 1055, checked in by garnier, 17 years ago

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1//
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24// ********************************************************************
25//
26// $Id: G4VMultipleScattering.hh,v 1.56 2009/04/07 18:39:47 vnivanch Exp $
27// GEANT4 tag $Name: geant4-09-03-beta-cand-01 $
28//
29// -------------------------------------------------------------------
30//
31// GEANT4 Class header file
32//
33//
34// File name: G4VMultipleScattering
35//
36// Author: Vladimir Ivanchenko on base of Laszlo Urban code
37//
38// Creation date: 12.03.2002
39//
40// Modifications:
41//
42// 16-07-03 Update GetRange interface (V.Ivanchenko)
43//
44//
45// Class Description:
46//
47// It is the generic process of multiple scattering it includes common
48// part of calculations for all charged particles
49//
50// 26-11-03 bugfix in AlongStepDoIt (L.Urban)
51// 25-05-04 add protection against case when range is less than steplimit (VI)
52// 30-06-04 make destructor virtual (V.Ivanchenko)
53// 27-08-04 Add InitialiseForRun method (V.Ivanchneko)
54// 08-11-04 Migration to new interface of Store/Retrieve tables (V.Ivanchenko)
55// 15-04-05 optimize internal interfaces (V.Ivanchenko)
56// 15-04-05 remove boundary flag (V.Ivanchenko)
57// 07-10-05 error in a protection in GetContinuousStepLimit corrected (L.Urban)
58// 27-10-05 introduce virtual function MscStepLimitation() (V.Ivanchenko)
59// 26-01-06 Rename GetRange -> GetRangeFromRestricteDEDX (V.Ivanchenko)
60// 17-02-06 Save table of transport cross sections not mfp (V.Ivanchenko)
61// 07-03-06 Move step limit calculation to model (V.Ivanchenko)
62// 13-05-06 Add method to access model by index (V.Ivanchenko)
63// 12-02-07 Add get/set skin (V.Ivanchenko)
64// 27-10-07 Virtual functions moved to source (V.Ivanchenko)
65// 15-07-08 Reorder class members for further multi-thread development (VI)
66// 07-04-09 Moved msc methods from G4VEmModel to G4VMscModel (VI)
67//
68
69// -------------------------------------------------------------------
70//
71
72#ifndef G4VMultipleScattering_h
73#define G4VMultipleScattering_h 1
74
75#include "G4VContinuousDiscreteProcess.hh"
76#include "globals.hh"
77#include "G4Material.hh"
78#include "G4MaterialCutsCouple.hh"
79#include "G4ParticleChangeForMSC.hh"
80#include "G4Track.hh"
81#include "G4Step.hh"
82#include "G4EmModelManager.hh"
83#include "G4VMscModel.hh"
84#include "G4MscStepLimitType.hh"
85
86class G4ParticleDefinition;
87class G4DataVector;
88class G4PhysicsTable;
89class G4PhysicsVector;
90
91//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
92
93class G4VMultipleScattering : public G4VContinuousDiscreteProcess
94{
95public:
96
97 G4VMultipleScattering(const G4String& name = "msc",
98 G4ProcessType type = fElectromagnetic);
99
100 virtual ~G4VMultipleScattering();
101
102 //------------------------------------------------------------------------
103 // Virtual methods to be implemented for the concrete model
104 //------------------------------------------------------------------------
105
106 virtual G4bool IsApplicable(const G4ParticleDefinition& p) = 0;
107
108 virtual void PrintInfo() = 0;
109
110protected:
111
112 virtual void InitialiseProcess(const G4ParticleDefinition*) = 0;
113
114public:
115
116 //------------------------------------------------------------------------
117 // Generic methods common to all ContinuousDiscrete processes
118 //------------------------------------------------------------------------
119
120 // Initialise for build of tables
121 void PreparePhysicsTable(const G4ParticleDefinition&);
122
123 // Build physics table during initialisation
124 void BuildPhysicsTable(const G4ParticleDefinition&);
125
126 // Print out of generic class parameters
127 void PrintInfoDefinition();
128
129 G4VParticleChange* AlongStepDoIt(const G4Track&, const G4Step&);
130
131 G4VParticleChange* PostStepDoIt(const G4Track&, const G4Step&);
132
133 // Store PhysicsTable in a file.
134 // Return false in case of failure at I/O
135 G4bool StorePhysicsTable(const G4ParticleDefinition*,
136 const G4String& directory,
137 G4bool ascii = false);
138
139 // Retrieve Physics from a file.
140 // (return true if the Physics Table can be build by using file)
141 // (return false if the process has no functionality or in case of failure)
142 // File name should is constructed as processName+particleName and the
143 // should be placed under the directory specifed by the argument.
144 G4bool RetrievePhysicsTable(const G4ParticleDefinition*,
145 const G4String& directory,
146 G4bool ascii);
147
148 // The function overloads the corresponding function of the base
149 // class.It limits the step near to boundaries only
150 // and invokes the method GetMscContinuousStepLimit at every step.
151 G4double AlongStepGetPhysicalInteractionLength(
152 const G4Track&,
153 G4double previousStepSize,
154 G4double currentMinimalStep,
155 G4double& currentSafety,
156 G4GPILSelection* selection);
157
158 // The function overloads the corresponding function of the base
159 // class.
160 G4double PostStepGetPhysicalInteractionLength(
161 const G4Track&,
162 G4double previousStepSize,
163 G4ForceCondition* condition);
164
165 // This method does not used for tracking, it is intended only for tests
166 inline G4double ContinuousStepLimit(const G4Track& track,
167 G4double previousStepSize,
168 G4double currentMinimalStep,
169 G4double& currentSafety);
170
171 //------------------------------------------------------------------------
172 // Specific methods to build and access Physics Tables
173 //------------------------------------------------------------------------
174
175 // Build empty Physics Vector
176 G4PhysicsVector* PhysicsVector(const G4MaterialCutsCouple*);
177
178 inline void SetBinning(G4int nbins);
179 inline G4int Binning() const;
180
181 inline void SetMinKinEnergy(G4double e);
182 inline G4double MinKinEnergy() const;
183
184 inline void SetMaxKinEnergy(G4double e);
185 inline G4double MaxKinEnergy() const;
186
187 inline void SetBuildLambdaTable(G4bool val);
188
189 inline G4PhysicsTable* LambdaTable() const;
190
191 // access particle type
192 inline const G4ParticleDefinition* Particle() const;
193
194 //------------------------------------------------------------------------
195 // Specific methods to set, access, modify models
196 //------------------------------------------------------------------------
197
198protected:
199 // Select model in run time
200 inline G4VEmModel* SelectModel(G4double kinEnergy);
201
202public:
203 // Select model in run time
204 inline G4VEmModel* SelectModelForMaterial(G4double kinEnergy,
205 size_t& idxRegion) const;
206
207 // Add model for region, smaller value of order defines which
208 // model will be selected for a given energy interval
209 void AddEmModel(G4int order, G4VEmModel*, const G4Region* region = 0);
210
211 // Access to models by index
212 G4VEmModel* GetModelByIndex(G4int idx = 0, G4bool ver = false);
213
214 //------------------------------------------------------------------------
215 // Get/Set parameters for simulation of multiple scattering
216 //------------------------------------------------------------------------
217
218 inline G4bool LateralDisplasmentFlag() const;
219 inline void SetLateralDisplasmentFlag(G4bool val);
220
221 inline G4double Skin() const;
222 inline void SetSkin(G4double val);
223
224 inline G4double RangeFactor() const;
225 inline void SetRangeFactor(G4double val);
226
227 inline G4double GeomFactor() const;
228 inline void SetGeomFactor(G4double val);
229
230 inline G4double PolarAngleLimit() const;
231 inline void SetPolarAngleLimit(G4double val);
232
233 inline G4MscStepLimitType StepLimitType() const;
234 inline void SetStepLimitType(G4MscStepLimitType val);
235
236 //------------------------------------------------------------------------
237 // Run time methods
238 //------------------------------------------------------------------------
239
240protected:
241
242 // This method is not used for tracking, it returns mean free path value
243 G4double GetMeanFreePath(const G4Track& track,
244 G4double,
245 G4ForceCondition* condition);
246
247 // This method is not used for tracking, it returns step limit
248 G4double GetContinuousStepLimit(const G4Track& track,
249 G4double previousStepSize,
250 G4double currentMinimalStep,
251 G4double& currentSafety);
252
253 // This method returns inversed transport cross section
254 inline G4double GetLambda(const G4ParticleDefinition* p,
255 G4double& kineticEnergy);
256
257 // This method is used for tracking, it returns step limit
258 inline G4double GetMscContinuousStepLimit(const G4Track& track,
259 G4double scaledKinEnergy,
260 G4double currentMinimalStep,
261 G4double& currentSafety);
262
263 // defines current material in run time
264 inline void DefineMaterial(const G4MaterialCutsCouple* couple);
265
266 inline const G4MaterialCutsCouple* CurrentMaterialCutsCouple() const;
267
268private:
269
270 // hide assignment operator
271 G4VMultipleScattering(G4VMultipleScattering &);
272 G4VMultipleScattering & operator=(const G4VMultipleScattering &right);
273
274 // ======== Parameters of the class fixed at construction =========
275
276 G4EmModelManager* modelManager;
277 G4bool buildLambdaTable;
278
279 // ======== Parameters of the class fixed at initialisation =======
280
281 G4PhysicsTable* theLambdaTable;
282 const G4ParticleDefinition* firstParticle;
283
284 G4MscStepLimitType stepLimit;
285
286 G4double minKinEnergy;
287 G4double maxKinEnergy;
288 G4double skin;
289 G4double facrange;
290 G4double facgeom;
291 G4double polarAngleLimit;
292
293 G4int nBins;
294
295 G4bool latDisplasment;
296
297 // ======== Cashed values - may be state dependent ================
298
299protected:
300
301 G4GPILSelection valueGPILSelectionMSC;
302 G4ParticleChangeForMSC fParticleChange;
303
304private:
305
306 G4VMscModel* currentModel;
307
308 // cache
309 const G4ParticleDefinition* currentParticle;
310 const G4MaterialCutsCouple* currentCouple;
311 size_t currentMaterialIndex;
312
313};
314
315//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
316//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
317
318inline G4double G4VMultipleScattering::ContinuousStepLimit(
319 const G4Track& track,
320 G4double previousStepSize,
321 G4double currentMinimalStep,
322 G4double& currentSafety)
323{
324 return GetMscContinuousStepLimit(track,previousStepSize,currentMinimalStep,
325 currentSafety);
326}
327
328//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
329
330inline void G4VMultipleScattering::SetBinning(G4int nbins)
331{
332 nBins = nbins;
333}
334
335//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
336
337inline G4int G4VMultipleScattering::Binning() const
338{
339 return nBins;
340}
341
342//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
343
344inline void G4VMultipleScattering::SetMinKinEnergy(G4double e)
345{
346 minKinEnergy = e;
347}
348
349//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
350
351inline G4double G4VMultipleScattering::MinKinEnergy() const
352{
353 return minKinEnergy;
354}
355
356//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
357
358inline void G4VMultipleScattering::SetMaxKinEnergy(G4double e)
359{
360 maxKinEnergy = e;
361}
362
363//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
364
365inline G4double G4VMultipleScattering::MaxKinEnergy() const
366{
367 return maxKinEnergy;
368}
369
370//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
371
372inline void G4VMultipleScattering::SetBuildLambdaTable(G4bool val)
373{
374 buildLambdaTable = val;
375}
376
377//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
378
379inline G4PhysicsTable* G4VMultipleScattering::LambdaTable() const
380{
381 return theLambdaTable;
382}
383
384//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
385
386inline const G4ParticleDefinition* G4VMultipleScattering::Particle() const
387{
388 return currentParticle;
389}
390
391//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
392
393inline G4VEmModel* G4VMultipleScattering::SelectModel(G4double kinEnergy)
394{
395 return modelManager->SelectModel(kinEnergy, currentMaterialIndex);
396}
397
398//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
399
400inline G4VEmModel* G4VMultipleScattering::SelectModelForMaterial(
401 G4double kinEnergy, size_t& idxRegion) const
402{
403 return modelManager->SelectModel(kinEnergy, idxRegion);
404}
405
406//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
407
408inline G4bool G4VMultipleScattering::LateralDisplasmentFlag() const
409{
410 return latDisplasment;
411}
412
413//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
414
415inline void G4VMultipleScattering::SetLateralDisplasmentFlag(G4bool val)
416{
417 latDisplasment = val;
418}
419
420//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
421
422inline G4double G4VMultipleScattering::Skin() const
423{
424 return skin;
425}
426
427//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
428
429inline void G4VMultipleScattering::SetSkin(G4double val)
430{
431 if(val < 1.0) skin = 0.0;
432 else skin = val;
433}
434
435//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
436
437inline G4double G4VMultipleScattering::RangeFactor() const
438{
439 return facrange;
440}
441
442//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
443
444inline void G4VMultipleScattering::SetRangeFactor(G4double val)
445{
446 if(val > 0.0) facrange = val;
447}
448
449//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
450
451inline G4double G4VMultipleScattering::GeomFactor() const
452{
453 return facgeom;
454}
455
456//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
457
458inline void G4VMultipleScattering::SetGeomFactor(G4double val)
459{
460 if(val > 0.0) facgeom = val;
461}
462
463//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
464
465inline G4double G4VMultipleScattering::PolarAngleLimit() const
466{
467 return polarAngleLimit;
468}
469
470//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
471
472inline void G4VMultipleScattering::SetPolarAngleLimit(G4double val)
473{
474 if(val < 0.0) polarAngleLimit = 0.0;
475 else if(val > pi) polarAngleLimit = pi;
476 else polarAngleLimit = val;
477}
478
479//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
480
481inline G4MscStepLimitType G4VMultipleScattering::StepLimitType() const
482{
483 return stepLimit;
484}
485
486//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
487
488inline void G4VMultipleScattering::SetStepLimitType(G4MscStepLimitType val)
489{
490 stepLimit = val;
491 if(val == fMinimal) facrange = 0.2;
492}
493
494//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
495
496inline
497G4double G4VMultipleScattering::GetLambda(const G4ParticleDefinition* p,
498 G4double& e)
499{
500 G4double x;
501 if(theLambdaTable) {
502 G4bool b;
503 x = ((*theLambdaTable)[currentMaterialIndex])->GetValue(e, b);
504 } else {
505 x = currentModel->CrossSection(currentCouple,p,e);
506 }
507 if(x > DBL_MIN) x = 1./x;
508 else x = DBL_MAX;
509 return x;
510}
511
512//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
513
514inline G4double G4VMultipleScattering::GetMscContinuousStepLimit(
515 const G4Track& track,
516 G4double scaledKinEnergy,
517 G4double currentMinimalStep,
518 G4double&)
519{
520 G4double x = currentMinimalStep;
521 DefineMaterial(track.GetMaterialCutsCouple());
522 currentModel = static_cast<G4VMscModel*>(SelectModel(scaledKinEnergy));
523 if(x > 0.0 && scaledKinEnergy > 0.0) {
524 G4double tPathLength =
525 currentModel->ComputeTruePathLengthLimit(track, theLambdaTable, x);
526 if (tPathLength < x) valueGPILSelectionMSC = CandidateForSelection;
527 x = currentModel->ComputeGeomPathLength(tPathLength);
528 // G4cout << "tPathLength= " << tPathLength
529 // << " stepLimit= " << x
530 // << " currentMinimalStep= " << currentMinimalStep<< G4endl;
531 }
532 return x;
533}
534
535//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
536
537inline
538void G4VMultipleScattering::DefineMaterial(const G4MaterialCutsCouple* couple)
539{
540 if(couple != currentCouple) {
541 currentCouple = couple;
542 currentMaterialIndex = couple->GetIndex();
543 }
544}
545
546//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
547
548inline const G4MaterialCutsCouple*
549G4VMultipleScattering::CurrentMaterialCutsCouple() const
550{
551 return currentCouple;
552}
553
554//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
555
556#endif
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