| Geant4 Cross Reference |
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 // * *
11 // * Neither the authors of this software system, nor their employing *
12 // * institutes,nor the agencies providing financial support for this *
13 // * work make any representation or warranty, express or implied, *
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 *
21 // * any work based on the software) you agree to acknowledge its *
22 // * use in resulting scientific publications, and indicate your *
23 // * acceptance of all terms of the Geant4 Software license. *
24 // ********************************************************************
25 //
26 //
27 //---------------------------------------------------------------------------
28 //
29 // ClassName: G4EnergyLossForExtrapolator
30 //
31 // Description: This class provide calculation of energy loss, fluctuation,
32 // and msc angle
33 //
34 // Author: 09.12.04 V.Ivanchenko
35 //
36 // Modification:
37 // 08-04-05 Rename Propogator -> Extrapolator
38 // 16-03-06 Add muon tables
39 // 21-03-06 Add verbosity defined in the constructor and Initialisation
40 // start only when first public method is called (V.Ivanchenko)
41 // 03-05-06 Remove unused pointer G4Material* from number of methods (VI)
42 // 28-07-07 Add maxEnergyTransfer for computation of energy loss (VI)
43 //
44 //----------------------------------------------------------------------------
45 //
46
47 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
48
49 #ifndef G4EnergyLossForExtrapolator_h
50 #define G4EnergyLossForExtrapolator_h 1
51
52 #include <vector>
53 #include <CLHEP/Units/PhysicalConstants.h>
54
55 #include "globals.hh"
56 #include "G4PhysicsTable.hh"
57 #include "G4TablesForExtrapolator.hh"
58 #include "G4Log.hh"
59 #include "G4Threading.hh"
60
61 class G4ParticleDefinition;
62 class G4Material;
63 class G4MaterialCutsCouple;
64
65 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
66
67 class G4EnergyLossForExtrapolator
68 {
69 public:
70
71 explicit G4EnergyLossForExtrapolator(G4int verb = 1);
72
73 ~G4EnergyLossForExtrapolator();
74
75 void Initialisation();
76
77 G4double ComputeDEDX(G4double kinEnergy, const G4ParticleDefinition*,
78 const G4Material*);
79
80 G4double ComputeRange(G4double kinEnergy, const G4ParticleDefinition*,
81 const G4Material*);
82
83 G4double ComputeEnergy(G4double range, const G4ParticleDefinition*,
84 const G4Material*);
85
86 G4double EnergyAfterStep(G4double kinEnergy, G4double step,
87 const G4Material*, const G4ParticleDefinition*);
88
89 G4double EnergyBeforeStep(G4double kinEnergy, G4double step,
90 const G4Material*, const G4ParticleDefinition*);
91
92 G4double TrueStepLength(G4double kinEnergy, G4double step,
93 const G4Material*, const G4ParticleDefinition* part);
94
95 inline G4double EnergyAfterStep(G4double kinEnergy, G4double step,
96 const G4Material*,
97 const G4String& particleName);
98
99 inline G4double EnergyBeforeStep(G4double kinEnergy, G4double step,
100 const G4Material*,
101 const G4String& particleName);
102
103 G4double AverageScatteringAngle(G4double kinEnergy, G4double step,
104 const G4Material*,
105 const G4ParticleDefinition* part);
106
107 inline G4double AverageScatteringAngle(G4double kinEnergy, G4double step,
108 const G4Material*,
109 const G4String& particleName);
110
111 inline G4double ComputeTrueStep(const G4Material*,
112 const G4ParticleDefinition* part,
113 G4double kinEnergy, G4double stepLength);
114
115 G4double EnergyDispersion(G4double kinEnergy, G4double step,
116 const G4Material*,
117 const G4ParticleDefinition*);
118
119 inline G4double EnergyDispersion(G4double kinEnergy, G4double step,
120 const G4Material*,
121 const G4String& particleName);
122
123 inline void SetVerbose(G4int val);
124
125 inline void SetMinKinEnergy(G4double);
126
127 inline void SetMaxKinEnergy(G4double);
128
129 inline void SetMaxEnergyTransfer(G4double);
130
131 // hide assignment operator
132 G4EnergyLossForExtrapolator & operator=
133 (const G4EnergyLossForExtrapolator &right) = delete;
134 G4EnergyLossForExtrapolator(const G4EnergyLossForExtrapolator&) = delete;
135
136 private:
137
138 G4bool SetupKinematics(const G4ParticleDefinition*, const G4Material*,
139 G4double kinEnergy);
140
141 const G4ParticleDefinition* FindParticle(const G4String& name);
142
143 inline G4double ComputeValue(G4double x, const G4PhysicsTable* table,
144 size_t idxMat);
145
146 inline const G4PhysicsTable* GetPhysicsTable(ExtTableType type) const;
147
148 #ifdef G4MULTITHREADED
149 static G4Mutex extrMutex;
150 #endif
151 static G4TablesForExtrapolator* tables;
152
153 const G4ParticleDefinition* currentParticle = nullptr;
154 const G4ParticleDefinition* electron = nullptr;
155 const G4ParticleDefinition* positron = nullptr;
156 const G4ParticleDefinition* muonPlus = nullptr;
157 const G4ParticleDefinition* muonMinus= nullptr;
158 const G4ParticleDefinition* proton = nullptr;
159 const G4Material* currentMaterial = nullptr;
160
161 G4double electronDensity = 0.0;
162 G4double radLength = 0.0;
163 G4double charge2 = 0.0;
164 G4double kineticEnergy = 0.0;
165 G4double gam = 1.0;
166 G4double bg2 = 0.0;
167 G4double beta2 = 0.0;
168 G4double tmax = 0.0;
169
170 G4double linLossLimit = 0.01;
171 G4double emin = 0.0;
172 G4double emax = 0.0;
173 G4double maxEnergyTransfer = 0.0;
174
175 size_t index = 0;
176 size_t nmat = 0;
177 G4int nbins = 80;
178 G4int verbose = 0;
179
180 G4bool isMaster = false;
181 };
182
183 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
184
185 inline const G4PhysicsTable*
186 G4EnergyLossForExtrapolator::GetPhysicsTable(ExtTableType type) const
187 {
188 return tables->GetPhysicsTable(type);
189 }
190
191 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
192
193 inline G4double
194 G4EnergyLossForExtrapolator::EnergyAfterStep(G4double kinEnergy,
195 G4double step,
196 const G4Material* mat,
197 const G4String& name)
198 {
199 return EnergyAfterStep(kinEnergy,step,mat,FindParticle(name));
200 }
201
202 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
203
204 inline G4double
205 G4EnergyLossForExtrapolator::EnergyBeforeStep(G4double kinEnergy,
206 G4double step,
207 const G4Material* mat,
208 const G4String& name)
209 {
210 return EnergyBeforeStep(kinEnergy,step,mat,FindParticle(name));
211 }
212
213 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
214
215 inline G4double
216 G4EnergyLossForExtrapolator::AverageScatteringAngle(G4double kinEnergy,
217 G4double step,
218 const G4Material* mat,
219 const G4String& name)
220 {
221 return AverageScatteringAngle(kinEnergy,step,mat,FindParticle(name));
222 }
223
224 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
225
226 inline G4double
227 G4EnergyLossForExtrapolator::EnergyDispersion(G4double kinEnergy,
228 G4double step,
229 const G4Material* mat,
230 const G4String& name)
231 {
232 return EnergyDispersion(kinEnergy,step,mat,FindParticle(name));
233 }
234
235 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
236
237 inline G4double
238 G4EnergyLossForExtrapolator::ComputeTrueStep(const G4Material* mat,
239 const G4ParticleDefinition* part,
240 G4double kinEnergy,
241 G4double stepLength)
242 {
243 G4double theta = AverageScatteringAngle(kinEnergy,stepLength,mat,part);
244 return stepLength*std::sqrt(1.0 + 0.625*theta*theta);
245 }
246
247 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
248
249 inline G4double
250 G4EnergyLossForExtrapolator::ComputeValue(G4double x,
251 const G4PhysicsTable* table,
252 size_t idxMat)
253 {
254 return (nullptr != table) ? ((*table)[idxMat])->Value(x, index) : 0.0;
255 }
256
257 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
258
259 inline void G4EnergyLossForExtrapolator::SetVerbose(G4int val)
260 {
261 verbose = val;
262 }
263
264 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
265
266 inline void G4EnergyLossForExtrapolator::SetMinKinEnergy(G4double val)
267 {
268 emin = val;
269 }
270
271 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
272
273 inline void G4EnergyLossForExtrapolator::SetMaxKinEnergy(G4double val)
274 {
275 emax = val;
276 }
277
278 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
279
280 inline void G4EnergyLossForExtrapolator::SetMaxEnergyTransfer(G4double val)
281 {
282 maxEnergyTransfer = val;
283 }
284
285 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
286
287 #endif
288
289