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25 // 25 //
>> 26 // $Id: G4WentzelVIModel.hh,v 1.29 2010/05/27 14:22:05 vnivanch Exp $
>> 27 // GEANT4 tag $Name: geant4-09-04-beta-01 $
26 // 28 //
27 // ------------------------------------------- 29 // -------------------------------------------------------------------
28 // 30 //
29 // 31 //
30 // GEANT4 Class header file 32 // GEANT4 Class header file
31 // 33 //
32 // 34 //
33 // File name: G4WentzelVIModel 35 // File name: G4WentzelVIModel
34 // 36 //
35 // Author: V.Ivanchenko 37 // Author: V.Ivanchenko
36 // 38 //
37 // Creation date: 09.04.2008 from G4MuMscModel 39 // Creation date: 09.04.2008 from G4MuMscModel
38 // 40 //
39 // Modifications: 41 // Modifications:
40 // 27-05-2010 V.Ivanchenko added G4WentzelOKan 42 // 27-05-2010 V.Ivanchenko added G4WentzelOKandVIxSection class to
41 // compute cross sections and sam 43 // compute cross sections and sample scattering angle
42 // 44 //
43 // Class Description: 45 // Class Description:
44 // 46 //
45 // Implementation of the model of multiple sca 47 // Implementation of the model of multiple scattering based on
46 // G.Wentzel, Z. Phys. 40 (1927) 590. 48 // G.Wentzel, Z. Phys. 40 (1927) 590.
47 // H.W.Lewis, Phys Rev 78 (1950) 526. 49 // H.W.Lewis, Phys Rev 78 (1950) 526.
48 // J.M. Fernandez-Varea et al., NIM B73 (1993) 50 // J.M. Fernandez-Varea et al., NIM B73 (1993) 447.
49 // L.Urban, CERN-OPEN-2006-077. 51 // L.Urban, CERN-OPEN-2006-077.
50 52
51 // ------------------------------------------- 53 // -------------------------------------------------------------------
52 // 54 //
53 55
54 #ifndef G4WentzelVIModel_h 56 #ifndef G4WentzelVIModel_h
55 #define G4WentzelVIModel_h 1 57 #define G4WentzelVIModel_h 1
56 58
57 //....oooOO0OOooo........oooOO0OOooo........oo 59 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
58 60
59 #include "G4VMscModel.hh" 61 #include "G4VMscModel.hh"
>> 62 #include "G4PhysicsTable.hh"
60 #include "G4MaterialCutsCouple.hh" 63 #include "G4MaterialCutsCouple.hh"
61 #include "G4WentzelOKandVIxSection.hh" 64 #include "G4WentzelOKandVIxSection.hh"
62 65
>> 66 class G4ParticleDefinition;
>> 67 class G4LossTableManager;
>> 68 class G4Pow;
>> 69
63 //....oooOO0OOooo........oooOO0OOooo........oo 70 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
64 71
65 class G4WentzelVIModel : public G4VMscModel 72 class G4WentzelVIModel : public G4VMscModel
66 { 73 {
67 74
68 public: 75 public:
69 76
70 explicit G4WentzelVIModel(G4bool comb=true, << 77 G4WentzelVIModel(const G4String& nam = "WentzelVIUni");
71 <<
72 ~G4WentzelVIModel() override; <<
73 <<
74 void Initialise(const G4ParticleDefinition*, <<
75 <<
76 void InitialiseLocal(const G4ParticleDefinit <<
77 G4VEmModel* masterModel) override; <<
78 <<
79 void StartTracking(G4Track*) override; <<
80 <<
81 G4double ComputeCrossSectionPerAtom(const G4 <<
82 G4double KineticEnergy, <<
83 G4double AtomicNumber, <<
84 G4double AtomicWeight=0., <<
85 G4double cut = DBL_MAX, <<
86 G4double emax= DBL_MAX) override <<
87 <<
88 G4ThreeVector& SampleScattering(const G4Thre <<
89 G4double safety) override; <<
90 <<
91 G4double <<
92 ComputeTruePathLengthLimit(const G4Track& tr <<
93 G4double& currentMinimalStep) overr <<
94 <<
95 G4double ComputeGeomPathLength(G4double true <<
96 <<
97 G4double ComputeTrueStepLength(G4double geom <<
98 78
99 // defines low energy limit on energy transf << 79 virtual ~G4WentzelVIModel();
100 void SetFixedCut(G4double); <<
101 80
102 // low energy limit on energy transfer to at << 81 virtual void Initialise(const G4ParticleDefinition*, const G4DataVector&);
103 G4double GetFixedCut() const; <<
104 82
105 // access to cross section class << 83 virtual G4double ComputeCrossSectionPerAtom(const G4ParticleDefinition*,
106 void SetWVICrossSection(G4WentzelOKandVIxSec << 84 G4double KineticEnergy,
>> 85 G4double AtomicNumber,
>> 86 G4double AtomicWeight=0.,
>> 87 G4double cut = DBL_MAX,
>> 88 G4double emax= DBL_MAX);
107 89
108 G4WentzelOKandVIxSection* GetWVICrossSection << 90 virtual void SampleScattering(const G4DynamicParticle*, G4double safety);
109 91
110 void SetUseSecondMoment(G4bool); << 92 virtual G4double ComputeTruePathLengthLimit(const G4Track& track,
>> 93 G4PhysicsTable* theLambdaTable,
>> 94 G4double currentMinimalStep);
111 95
112 G4bool UseSecondMoment() const; << 96 virtual G4double ComputeGeomPathLength(G4double truePathLength);
113 97
114 G4PhysicsTable* GetSecondMomentTable(); << 98 virtual G4double ComputeTrueStepLength(G4double geomStepLength);
115 99
116 G4double SecondMoment(const G4ParticleDefini << 100 private:
117 const G4MaterialCutsCouple*, <<
118 G4double kineticEnergy); <<
119 <<
120 void SetSingleScatteringFactor(G4double); <<
121 <<
122 void DefineMaterial(const G4MaterialCutsCoup <<
123 <<
124 G4WentzelVIModel & operator=(const G4Wentzel <<
125 G4WentzelVIModel(const G4WentzelVIModel&) = <<
126 101
127 protected: << 102 G4double ComputeXSectionPerVolume();
128 103
129 G4double ComputeTransportXSectionPerVolume(G << 104 inline G4double GetLambda(G4double kinEnergy);
130 105
131 inline void SetupParticle(const G4ParticleDe 106 inline void SetupParticle(const G4ParticleDefinition*);
132 107
133 private: << 108 inline void DefineMaterial(const G4MaterialCutsCouple*);
134 109
135 G4double ComputeSecondMoment(const G4Particl << 110 // hide assignment operator
136 G4double kineticEnergy); << 111 G4WentzelVIModel & operator=(const G4WentzelVIModel &right);
137 << 112 G4WentzelVIModel(const G4WentzelVIModel&);
138 protected: <<
139 113
>> 114 G4LossTableManager* theManager;
>> 115 G4ParticleChangeForMSC* fParticleChange;
140 G4WentzelOKandVIxSection* wokvi; 116 G4WentzelOKandVIxSection* wokvi;
141 const G4MaterialCutsCouple* currentCouple = << 117 G4Pow* fG4pow;
142 const G4Material* currentMaterial = nullptr; <<
143 118
144 const G4ParticleDefinition* particle = nullp << 119 G4PhysicsTable* theLambdaTable;
145 G4ParticleChangeForMSC* fParticleChange = nu << 120 const G4DataVector* currentCuts;
146 const G4DataVector* currentCuts = nullptr; <<
147 G4PhysicsTable* fSecondMoments = nullptr; <<
148 121
149 G4double lowEnergyLimit; <<
150 G4double tlimitminfix; 122 G4double tlimitminfix;
151 G4double ssFactor = 1.05; << 123 G4double invsqrt12;
152 G4double invssFactor = 1.0; <<
153 124
154 // cache kinematics 125 // cache kinematics
155 G4double preKinEnergy = 0.0; << 126 G4double preKinEnergy;
156 G4double tPathLength = 0.0; << 127 G4double tPathLength;
157 G4double zPathLength = 0.0; << 128 G4double zPathLength;
158 G4double lambdaeff = 0.0; << 129 G4double lambdaeff;
159 G4double currentRange = 0.0; << 130 G4double currentRange;
160 G4double cosTetMaxNuc = 0.0; <<
161 131
162 G4double fixedCut = -1.0; << 132 // data for single scattering mode
>> 133 G4double xtsec;
>> 134 std::vector<G4double> xsecn;
>> 135 std::vector<G4double> prob;
>> 136 G4int nelments;
163 137
164 // cache kinematics << 138 G4double numlimit;
165 G4double effKinEnergy = 0.0; <<
166 139
167 // single scattering parameters << 140 // cache material
168 G4double cosThetaMin = 1.0; << 141 G4int currentMaterialIndex;
169 G4double cosThetaMax = -1.0; << 142 const G4MaterialCutsCouple* currentCouple;
170 G4double xtsec = 0.0; << 143 const G4Material* currentMaterial;
171 144
172 G4int currentMaterialIndex = 0; << 145 // single scattering parameters
173 size_t idx2 = 0; << 146 G4double cosThetaMin;
>> 147 G4double cosThetaMax;
>> 148 G4double cosTetMaxNuc;
174 149
175 // data for single scattering mode << 150 // projectile
176 G4int nelments = 0; << 151 const G4ParticleDefinition* particle;
>> 152 G4double lowEnergyLimit;
177 153
178 // flags 154 // flags
179 G4bool singleScatteringMode; << 155 G4bool isInitialized;
180 G4bool isCombined; << 156 G4bool inside;
181 G4bool useSecondMoment; <<
182 <<
183 std::vector<G4double> xsecn; <<
184 std::vector<G4double> prob; <<
185 }; 157 };
186 158
187 //....oooOO0OOooo........oooOO0OOooo........oo 159 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
188 //....oooOO0OOooo........oooOO0OOooo........oo 160 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
189 161
190 inline void G4WentzelVIModel::SetupParticle(co << 162 inline
191 { << 163 void G4WentzelVIModel::DefineMaterial(const G4MaterialCutsCouple* cup)
192 // Initialise mass and charge << 164 {
193 if(p != particle) { << 165 if(cup != currentCouple) {
194 particle = p; << 166 currentCouple = cup;
195 wokvi->SetupParticle(p); << 167 currentMaterial = cup->GetMaterial();
>> 168 currentMaterialIndex = currentCouple->GetIndex();
196 } 169 }
197 } 170 }
198 171
199 //....oooOO0OOooo........oooOO0OOooo........oo << 172 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
200 <<
201 inline void G4WentzelVIModel::SetFixedCut(G4do <<
202 { <<
203 fixedCut = val; <<
204 } <<
205 <<
206 //....oooOO0OOooo........oooOO0OOooo........oo <<
207 <<
208 inline G4double G4WentzelVIModel::GetFixedCut( <<
209 { <<
210 return fixedCut; <<
211 } <<
212 <<
213 //....oooOO0OOooo........oooOO0OOooo........oo <<
214 173
215 inline void G4WentzelVIModel::SetWVICrossSecti << 174 inline
>> 175 G4double G4WentzelVIModel::GetLambda(G4double e)
216 { 176 {
217 if(ptr != wokvi) { << 177 G4double x;
218 delete wokvi; << 178 if(theLambdaTable) {
219 wokvi = ptr; << 179 x = ((*theLambdaTable)[currentMaterialIndex])->Value(e);
>> 180 } else {
>> 181 x = CrossSection(currentCouple,particle,e,
>> 182 (*currentCuts)[currentMaterialIndex]);
220 } 183 }
>> 184 if(x > DBL_MIN) { x = 1./x; }
>> 185 else { x = DBL_MAX; }
>> 186 return x;
221 } 187 }
222 188
223 //....oooOO0OOooo........oooOO0OOooo........oo 189 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
224 190
225 inline G4WentzelOKandVIxSection* G4WentzelVIMo << 191 inline void G4WentzelVIModel::SetupParticle(const G4ParticleDefinition* p)
226 { <<
227 return wokvi; <<
228 } <<
229 <<
230 //....oooOO0OOooo........oooOO0OOooo........oo <<
231 <<
232 inline void G4WentzelVIModel::SetUseSecondMome <<
233 { <<
234 useSecondMoment = val; <<
235 } <<
236 <<
237 //....oooOO0OOooo........oooOO0OOooo........oo <<
238 <<
239 inline G4bool G4WentzelVIModel::UseSecondMomen <<
240 { <<
241 return useSecondMoment; <<
242 } <<
243 <<
244 //....oooOO0OOooo........oooOO0OOooo........oo <<
245 <<
246 inline G4PhysicsTable* G4WentzelVIModel::GetSe <<
247 { <<
248 return fSecondMoments; <<
249 } <<
250 <<
251 //....oooOO0OOooo........oooOO0OOooo........oo <<
252 <<
253 inline G4double <<
254 G4WentzelVIModel::SecondMoment(const G4Particl <<
255 const G4MaterialCutsCouple* coupl <<
256 G4double ekin) <<
257 { 192 {
258 G4double x = 0.0; << 193 // Initialise mass and charge
259 if(useSecondMoment) { << 194 if(p != particle) {
260 DefineMaterial(couple); << 195 particle = p;
261 x = (fSecondMoments) ? << 196 wokvi->SetupParticle(p);
262 (*fSecondMoments)[(*theDensityIdx)[curre <<
263 *(*theDensityFactor)[currentMaterialInde <<
264 : ComputeSecondMoment(part, ekin); <<
265 } 197 }
266 return x; <<
267 } 198 }
268 199
269 //....oooOO0OOooo........oooOO0OOooo........oo 200 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
270 201
271 #endif 202 #endif
272 203
273 204