source: trunk/source/processes/electromagnetic/muons/include/G4MuMscModel.hh @ 924

Last change on this file since 924 was 819, checked in by garnier, 16 years ago

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25//
26// $Id: G4MuMscModel.hh,v 1.4 2007/11/09 19:48:09 vnivanch Exp $
27// GEANT4 tag $Name: geant4-09-01-patch-02 $
28//
29// -------------------------------------------------------------------
30//
31//
32// GEANT4 Class header file
33//
34//
35// File name:     G4MuMscModel
36//
37// Author:        V.Ivanchenko on base of L.Urban model
38//
39// Creation date: 25.10.2007
40//
41// Modifications:
42//
43//
44// Class Description:
45//
46// Implementation of the model of multiple scattering based on
47// H.W.Lewis Phys Rev 78 (1950) 526 and L.Urban model
48
49// -------------------------------------------------------------------
50//
51
52#ifndef G4MuMscModel_h
53#define G4MuMscModel_h 1
54
55//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
56
57#include "G4eCoulombScatteringModel.hh"
58#include "G4PhysicsTable.hh"
59#include "G4MscStepLimitType.hh"
60#include "G4MaterialCutsCouple.hh"
61
62class G4LossTableManager;
63class G4ParticleChangeForMSC;
64class G4SafetyHelper;
65
66//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
67
68class G4MuMscModel : public G4eCoulombScatteringModel
69{
70
71public:
72
73  G4MuMscModel(G4double frange = 0.2,
74               G4double thetaMax = 0.04,
75               G4double tMax = TeV*TeV, 
76               const G4String& nam = "MuMscUni");
77
78  virtual ~G4MuMscModel();
79
80  void Initialise(const G4ParticleDefinition*, const G4DataVector&);
81
82  G4double ComputeCrossSectionPerAtom(const G4ParticleDefinition*,
83                                      G4double KineticEnergy,
84                                      G4double AtomicNumber,
85                                      G4double AtomicWeight=0., 
86                                      G4double cut = DBL_MAX,
87                                      G4double emax= DBL_MAX);
88
89  void SampleScattering(const G4DynamicParticle*, G4double safety);
90
91  void SampleSecondaries(std::vector<G4DynamicParticle*>*, 
92                         const G4MaterialCutsCouple*,
93                         const G4DynamicParticle*,
94                         G4double,
95                         G4double);
96
97  G4double ComputeTruePathLengthLimit(const G4Track& track,
98                                      G4PhysicsTable* theLambdaTable,
99                                      G4double currentMinimalStep);
100
101  G4double ComputeGeomPathLength(G4double truePathLength);
102
103  G4double ComputeTrueStepLength(G4double geomStepLength);
104
105  inline void SetStepLimitType(G4MscStepLimitType);
106
107  inline void SetLateralDisplasmentFlag(G4bool val);
108
109  inline G4double GetLambda(G4double kinEnergy);
110
111  inline G4double GetLambda2(G4double kinEnergy);
112
113  //  inline void SetThetaLimit(G4double);
114
115  inline void SetRangeFactor(G4double);
116
117private:
118
119  void BuildTables();
120
121  G4double ComputeLambda2(G4double kinEnergy, G4double cut);
122
123  inline void DefineMaterial(const G4MaterialCutsCouple*);
124
125  //  hide assignment operator
126  G4MuMscModel & operator=(const  G4MuMscModel &right);
127  G4MuMscModel(const  G4MuMscModel&);
128
129  G4ParticleChangeForMSC*     fParticleChange;
130
131  G4SafetyHelper*             safetyHelper;
132  G4PhysicsTable*             theLambdaTable;
133  G4PhysicsTable*             theLambda2Table;
134  G4LossTableManager*         theManager;
135  const G4DataVector*         currentCuts;
136
137  G4double dtrl;
138  G4double facrange;
139  G4double thetaLimit;
140  G4double numlimit;
141  G4double tlimitminfix;
142  G4double invsqrt12;
143  G4double lowBinEnergy;
144  G4double highBinEnergy;
145
146  // cash
147  G4double preKinEnergy;
148  G4double xSection;
149  G4double ecut;
150  G4double lambda0;
151  G4double tPathLength;
152  G4double zPathLength;
153  G4double lambdaeff;
154  G4double currentRange; 
155  G4double par1;
156  G4double par2;
157  G4double par3;
158
159  G4int    currentMaterialIndex;
160
161  G4int    nbins;
162  G4int    nwarnings;
163  G4int    nwarnlimit;
164
165  const G4MaterialCutsCouple* currentCouple;
166
167  G4MscStepLimitType steppingAlgorithm;
168
169  G4bool   samplez;
170  G4bool   latDisplasment;
171  G4bool   isInitialized;
172  G4bool   buildTables;
173  G4bool   newrun;
174  G4bool   inside;
175};
176
177//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
178//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
179
180inline
181void G4MuMscModel::SetLateralDisplasmentFlag(G4bool val) 
182{ 
183  latDisplasment = val;
184}
185
186//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
187/*
188inline
189void G4MuMscModel::SetThetaLimit(G4double val)
190{
191  thetaLimit = val;
192}
193*/
194//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
195
196inline
197void G4MuMscModel::SetRangeFactor(G4double val) 
198{ 
199  facrange = val;
200}
201
202//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
203
204inline
205void G4MuMscModel::SetStepLimitType(G4MscStepLimitType val) 
206{ 
207  steppingAlgorithm = val;
208}
209
210//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
211
212inline
213void G4MuMscModel::DefineMaterial(const G4MaterialCutsCouple* cup) 
214{ 
215  if(cup != currentCouple) {
216    currentCouple = cup;
217    currentMaterialIndex = currentCouple->GetIndex(); 
218  }
219}
220
221//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
222
223inline
224G4double G4MuMscModel::GetLambda(G4double e)
225{
226  G4double x;
227  if(theLambdaTable) {
228    G4bool b;
229    x = ((*theLambdaTable)[currentMaterialIndex])->GetValue(e, b);
230  } else {
231    x = CrossSection(currentCouple,particle,e);
232  }
233  if(x > DBL_MIN) x = 1./x;
234  else            x = DBL_MAX;
235  return x;
236}
237
238//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
239
240inline
241G4double G4MuMscModel::GetLambda2(G4double e)
242{
243  G4double x;
244  if(theLambda2Table) {
245    G4bool b;
246    x = ((*theLambda2Table)[currentMaterialIndex])->GetValue(e, b);
247  } else {
248    x = ComputeLambda2(e, (*currentCuts)[currentMaterialIndex]);
249  }
250  return x;
251}
252
253//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
254
255#endif
256
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