source: trunk/source/processes/electromagnetic/standard/include/G4UrbanMscModel90.hh@ 880

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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 *
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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 *
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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: G4UrbanMscModel90.hh,v 1.1 2007/12/07 17:35:52 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: G4UrbanMscModel90
36//
37// Author: V.Ivanchenko clone Laszlo Urban model
38//
39// Creation date: 07.12.2007
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 G4UrbanMscModel90_h
53#define G4UrbanMscModel90_h 1
54
55//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
56
57#include "G4VEmModel.hh"
58#include "G4PhysicsTable.hh"
59#include "G4MscStepLimitType.hh"
60
61class G4ParticleChangeForMSC;
62class G4SafetyHelper;
63class G4LossTableManager;
64
65//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
66
67class G4UrbanMscModel90 : public G4VEmModel
68{
69
70public:
71
72 G4UrbanMscModel90(G4double facrange, G4double dtrl, G4double lambdalimit,
73 G4double facgeom,G4double skin,
74 G4bool samplez, G4MscStepLimitType stepAlg,
75 const G4String& nam = "UrbanMscUni");
76
77 virtual ~G4UrbanMscModel90();
78
79 virtual void Initialise(const G4ParticleDefinition*, const G4DataVector&);
80
81 G4double ComputeCrossSectionPerAtom(const G4ParticleDefinition* particle,
82 G4double KineticEnergy,
83 G4double AtomicNumber,
84 G4double AtomicWeight=0.,
85 G4double cut =0.,
86 G4double emax=DBL_MAX);
87
88 void SampleSecondaries(std::vector<G4DynamicParticle*>*,
89 const G4MaterialCutsCouple*,
90 const G4DynamicParticle*,
91 G4double,
92 G4double);
93
94 void SampleScattering(const G4DynamicParticle*,
95 G4double safety);
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 G4double ComputeTheta0(G4double truePathLength,
106 G4double KineticEnergy);
107
108 void SetStepLimitType(G4MscStepLimitType);
109
110 void SetLateralDisplasmentFlag(G4bool val);
111
112 void SetRangeFactor(G4double);
113
114 void SetGeomFactor(G4double);
115
116 void SetSkin(G4double);
117
118private:
119
120 G4double SampleCosineTheta(G4double trueStepLength, G4double KineticEnergy);
121
122 G4double SampleDisplacement();
123
124 G4double LatCorrelation();
125
126 G4double GetLambda(G4double kinEnergy);
127
128 void GeomLimit(const G4Track& track);
129
130 void SetParticle(const G4ParticleDefinition* p);
131
132 // hide assignment operator
133 G4UrbanMscModel90 & operator=(const G4UrbanMscModel90 &right);
134 G4UrbanMscModel90(const G4UrbanMscModel90&);
135
136 const G4ParticleDefinition* particle;
137 G4ParticleChangeForMSC* fParticleChange;
138
139 G4SafetyHelper* safetyHelper;
140 G4PhysicsTable* theLambdaTable;
141 const G4MaterialCutsCouple* couple;
142 G4LossTableManager* theManager;
143
144
145 G4double mass;
146 G4double charge;
147
148 G4double masslimite,masslimitmu;
149
150 G4double taubig;
151 G4double tausmall;
152 G4double taulim;
153 G4double currentTau;
154 G4double dtrl;
155
156 G4double lambdalimit;
157 G4double facrange;
158 G4double frscaling1,frscaling2;
159 G4double tlimit;
160 G4double tlimitmin;
161 G4double tlimitminfix;
162
163 G4double nstepmax;
164 G4double geombig;
165 G4double geommin;
166 G4double geomlimit;
167 G4double facgeom;
168 G4double skin;
169 G4double skindepth;
170 G4double smallstep;
171
172 G4double presafety;
173 G4double facsafety;
174
175 G4double lambda0;
176 G4double lambdaeff;
177 G4double tPathLength;
178 G4double zPathLength;
179 G4double par1,par2,par3 ;
180
181 G4double stepmin ;
182
183 G4double currentKinEnergy;
184 G4double currentRange;
185 G4double currentRadLength;
186
187 G4double Zeff;
188
189 G4int currentMaterialIndex;
190
191 G4MscStepLimitType steppingAlgorithm;
192
193 G4bool samplez;
194 G4bool latDisplasment;
195 G4bool isInitialized;
196
197 G4bool inside;
198 G4bool insideskin;
199
200};
201
202//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
203//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
204
205inline
206void G4UrbanMscModel90::SetLateralDisplasmentFlag(G4bool val)
207{
208 latDisplasment = val;
209}
210
211//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
212
213inline
214void G4UrbanMscModel90::SetSkin(G4double val)
215{
216 skin = val;
217 stepmin = tlimitminfix;
218 skindepth = skin*stepmin;
219}
220
221//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
222
223inline
224void G4UrbanMscModel90::SetRangeFactor(G4double val)
225{
226 facrange = val;
227}
228
229//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
230
231inline
232void G4UrbanMscModel90::SetGeomFactor(G4double val)
233{
234 facgeom = val;
235}
236
237//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
238
239inline
240void G4UrbanMscModel90::SetStepLimitType(G4MscStepLimitType val)
241{
242 steppingAlgorithm = val;
243}
244
245//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
246
247inline
248G4double G4UrbanMscModel90::GetLambda(G4double e)
249{
250 G4double x;
251 if(theLambdaTable) {
252 G4bool b;
253 x = ((*theLambdaTable)[currentMaterialIndex])->GetValue(e, b);
254 } else {
255 x = CrossSection(couple,particle,e);
256 }
257 if(x > DBL_MIN) x = 1./x;
258 else x = DBL_MAX;
259 return x;
260}
261
262//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
263
264inline
265void G4UrbanMscModel90::SetParticle(const G4ParticleDefinition* p)
266{
267 if (p != particle) {
268 particle = p;
269 mass = p->GetPDGMass();
270 charge = p->GetPDGCharge()/eplus;
271 }
272}
273
274//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
275
276#endif
277
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