source: trunk/source/processes/electromagnetic/muons/include/G4MuMscModel.hh@ 966

Last change on this file since 966 was 819, checked in by garnier, 17 years ago

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[819]1//
2// ********************************************************************
3// * License and Disclaimer *
4// * *
5// * The Geant4 software is copyright of the Copyright Holders of *
6// * the Geant4 Collaboration. It is provided under the terms and *
7// * conditions of the Geant4 Software License, included in the file *
8// * LICENSE and available at http://cern.ch/geant4/license . These *
9// * include a list of copyright holders. *
10// * *
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12// * institutes,nor the agencies providing financial support for this *
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14// * regarding this software system or assume any liability for its *
15// * use. Please see the license in the file LICENSE and URL above *
16// * for the full disclaimer and the limitation of liability. *
17// * *
18// * This code implementation is the result of the scientific and *
19// * technical work of the GEANT4 collaboration. *
20// * By using, copying, modifying or distributing the software (or *
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24// ********************************************************************
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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