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25 //
26 // G4PAIxSection.hh -- header file
27 //
28 // GEANT 4 class header file --- Copyright CERN 1995
29 // CERB Geneva Switzerland
30 //
31 // for information related to this code, please, contact
32 // CERN, CN Division, ASD Group
33 //
34 // Preparation of ionizing collision cross section according to Photo Absorption
35 // Ionization (PAI) model for simulation of ionization energy losses in very thin
36 // absorbers. Author: Vladimir.Grichine@cern.ch
37 //
38 // History:
39 //
40 // 28.10.11, V. Ivanchenko: Migration of exceptions to the new design
41 // 19.10.03, V. Grichine: Integral dEdx was added for G4PAIModel class
42 // 13.05.03, V. Grichine: Numerical instability was fixed in SumOverInterval/Border
43 // functions
44 // 10.02.02, V. Grichine: New functions and arrays/gets for Cerenkov and
45 // plasmon collisions dN/dx
46 // 27.10.99, V. Grichine: Bug fixed in constructors, 3rd constructor and
47 // GetStepEnergyLoss(step) were added, fDelta = 0.005
48 // 30.11.97, V. Grichine: 2nd version
49 // 11.06.97, V. Grichine: 1st version
50
51 #ifndef G4PAIXSECTION_HH
52 #define G4PAIXSECTION_HH
53
54 #include "G4ios.hh"
55 #include "globals.hh"
56 #include "Randomize.hh"
57
58 #include "G4SandiaTable.hh"
59
60 class G4MaterialCutsCouple;
61 class G4Sandiatable;
62
63
64 class G4PAIxSection
65 {
66 public:
67 // Constructors
68 G4PAIxSection();
69 G4PAIxSection( G4MaterialCutsCouple* matCC);
70
71 G4PAIxSection( G4int materialIndex, G4double maxEnergyTransfer );
72
73 G4PAIxSection( G4int materialIndex, // for proton loss table
74 G4double maxEnergyTransfer,
75 G4double betaGammaSq ,
76 G4double** photoAbsCof, G4int intNumber );
77
78 G4PAIxSection( G4int materialIndex, // test constructor
79 G4double maxEnergyTransfer,
80 G4double betaGammaSq );
81
82 ~G4PAIxSection();
83
84 void Initialize(const G4Material* material, G4double maxEnergyTransfer,
85 G4double betaGammaSq, G4SandiaTable*);
86
87 // General control functions
88
89 void ComputeLowEnergyCof(const G4Material* material);
90 void ComputeLowEnergyCof();
91
92 void InitPAI();
93
94 void NormShift( G4double betaGammaSq );
95
96 void SplainPAI( G4double betaGammaSq );
97
98 // Physical methods
99
100 G4double RutherfordIntegral( G4int intervalNumber,
101 G4double limitLow,
102 G4double limitHigh );
103
104 G4double ImPartDielectricConst( G4int intervalNumber,
105 G4double energy );
106
107 G4double GetPhotonRange( G4double energy );
108 G4double GetElectronRange( G4double energy );
109
110 G4double RePartDielectricConst(G4double energy);
111
112 G4double DifPAIxSection( G4int intervalNumber,
113 G4double betaGammaSq );
114
115 G4double PAIdNdxCerenkov( G4int intervalNumber,
116 G4double betaGammaSq );
117 G4double PAIdNdxMM( G4int intervalNumber,
118 G4double betaGammaSq );
119
120 G4double PAIdNdxPlasmon( G4int intervalNumber,
121 G4double betaGammaSq );
122
123 G4double PAIdNdxResonance( G4int intervalNumber,
124 G4double betaGammaSq );
125
126
127 void IntegralPAIxSection();
128 void IntegralCerenkov();
129 void IntegralMM();
130 void IntegralPlasmon();
131 void IntegralResonance();
132
133 G4double SumOverInterval(G4int intervalNumber);
134 G4double SumOverIntervaldEdx(G4int intervalNumber);
135 G4double SumOverInterCerenkov(G4int intervalNumber);
136 G4double SumOverInterMM(G4int intervalNumber);
137 G4double SumOverInterPlasmon(G4int intervalNumber);
138 G4double SumOverInterResonance(G4int intervalNumber);
139
140 G4double SumOverBorder( G4int intervalNumber,
141 G4double energy );
142 G4double SumOverBorderdEdx( G4int intervalNumber,
143 G4double energy );
144 G4double SumOverBordCerenkov( G4int intervalNumber,
145 G4double energy );
146 G4double SumOverBordMM( G4int intervalNumber,
147 G4double energy );
148 G4double SumOverBordPlasmon( G4int intervalNumber,
149 G4double energy );
150 G4double SumOverBordResonance( G4int intervalNumber,
151 G4double energy );
152
153 G4double GetStepEnergyLoss( G4double step );
154 G4double GetStepCerenkovLoss( G4double step );
155 G4double GetStepMMLoss( G4double step );
156 G4double GetStepPlasmonLoss( G4double step );
157 G4double GetStepResonanceLoss( G4double step );
158
159 G4double GetEnergyTransfer();
160 G4double GetCerenkovEnergyTransfer();
161 G4double GetMMEnergyTransfer();
162 G4double GetPlasmonEnergyTransfer();
163 G4double GetResonanceEnergyTransfer();
164 G4double GetRutherfordEnergyTransfer();
165
166 // Inline access functions
167
168 G4int GetNumberOfGammas() const { return fNumberOfGammas; }
169
170 G4int GetSplineSize() const { return fSplineNumber; }
171
172 G4int GetIntervalNumber() const { return fIntervalNumber; }
173
174 G4double GetEnergyInterval(G4int i){ return fEnergyInterval[i]; }
175
176 G4double GetDifPAIxSection(G4int i){ return fDifPAIxSection[i]; }
177 G4double GetPAIdNdxCerenkov(G4int i){ return fdNdxCerenkov[i]; }
178 G4double GetPAIdNdxMM(G4int i){ return fdNdxMM[i]; }
179 G4double GetPAIdNdxPlasmon(G4int i){ return fdNdxPlasmon[i]; }
180 G4double GetPAIdNdxResonance(G4int i){ return fdNdxResonance[i]; }
181
182 G4double GetMeanEnergyLoss() const {return fIntegralPAIxSection[0]; }
183 G4double GetMeanCerenkovLoss() const {return fIntegralCerenkov[0]; }
184 G4double GetMeanMMLoss() const {return fIntegralMM[0]; }
185 G4double GetMeanPlasmonLoss() const {return fIntegralPlasmon[0]; }
186 G4double GetMeanResonanceLoss() const {return fIntegralResonance[0]; }
187
188 G4double GetNormalizationCof() const { return fNormalizationCof; }
189
190 G4double GetLowEnergyCof() const { return fLowEnergyCof; }
191
192 G4double GetLorentzFactor(G4int i) const;
193
194 inline void SetVerbose(G4int v) { fVerbose=v; };
195
196
197 inline G4double GetPAItable(G4int i,G4int j) const;
198
199 inline G4double GetSplineEnergy(G4int i) const;
200
201 inline G4double GetIntegralPAIxSection(G4int i) const;
202 inline G4double GetIntegralPAIdEdx(G4int i) const;
203 inline G4double GetIntegralCerenkov(G4int i) const;
204 inline G4double GetIntegralMM(G4int i) const;
205 inline G4double GetIntegralPlasmon(G4int i) const;
206 inline G4double GetIntegralResonance(G4int i) const;
207
208 G4PAIxSection & operator=(const G4PAIxSection &right) = delete;
209 G4PAIxSection(const G4PAIxSection&) = delete;
210
211 private :
212
213 void CallError(G4int i, const G4String& methodName) const;
214
215 // Local class constants
216
217 static const G4double fDelta; // energy shift from interval border = 0.001
218 static const G4double fError; // error in lin-log approximation = 0.005
219
220 static G4int fNumberOfGammas; // = 111;
221 static const G4double fLorentzFactor[112]; // static gamma array
222
223 static
224 const G4int fRefGammaNumber; // The number of gamma for creation of spline (15)
225
226 G4int fIntervalNumber ; // The number of energy intervals
227 G4double fNormalizationCof; // Normalization cof for PhotoAbsorptionXsection
228
229 G4int fMaterialIndex; // current material index
230 G4double fDensity; // Current density
231 G4double fElectronDensity; // Current electron (number) density
232 G4double fLowEnergyCof; // Correction cof for low energy region
233 G4int fSplineNumber; // Current size of spline
234 G4int fVerbose; // verbose flag
235
236 // Arrays of Sandia coefficients
237
238 G4OrderedTable* fMatSandiaMatrix;
239
240 G4SandiaTable* fSandia;
241
242 G4DataVector fEnergyInterval;
243 G4DataVector fA1;
244 G4DataVector fA2;
245 G4DataVector fA3;
246 G4DataVector fA4;
247
248 static
249 const G4int fMaxSplineSize ; // Max size of output splain arrays = 500
250
251 G4DataVector fSplineEnergy; // energy points of splain
252 G4DataVector fRePartDielectricConst; // Real part of dielectric const
253 G4DataVector fImPartDielectricConst; // Imaginary part of dielectric const
254 G4DataVector fIntegralTerm; // Integral term in PAI cross section
255 G4DataVector fDifPAIxSection; // Differential PAI cross section
256 G4DataVector fdNdxCerenkov; // dNdx of Cerenkov collisions
257 G4DataVector fdNdxPlasmon; // dNdx of Plasmon collisions
258 G4DataVector fdNdxMM; // dNdx of MM-Cerenkov collisions
259 G4DataVector fdNdxResonance; // dNdx of Resonance collisions
260
261 G4DataVector fIntegralPAIxSection; // Integral PAI cross section ?
262 G4DataVector fIntegralPAIdEdx; // Integral PAI dEdx ?
263 G4DataVector fIntegralCerenkov; // Integral Cerenkov N>omega ?
264 G4DataVector fIntegralPlasmon; // Integral Plasmon N>omega ?
265 G4DataVector fIntegralMM; // Integral MM N>omega ?
266 G4DataVector fIntegralResonance; // Integral resonance N>omega ?
267
268 G4double fPAItable[500][112]; // Output array
269
270 };
271
272 //////////////// Inline methods //////////////////////////////////
273 //
274
275 inline G4double G4PAIxSection::GetPAItable(G4int i, G4int j) const
276 {
277 return fPAItable[i][j];
278 }
279
280 inline G4double G4PAIxSection::GetSplineEnergy(G4int i) const
281 {
282 if(i < 1 || i > fSplineNumber) { CallError(i, "GetSplineEnergy"); }
283 return fSplineEnergy[i];
284 }
285
286 inline G4double G4PAIxSection::GetIntegralPAIxSection(G4int i) const
287 {
288 if(i < 1 || i > fSplineNumber) { CallError(i, "GetIntegralPAIxSection"); }
289 return fIntegralPAIxSection[i];
290 }
291
292 inline G4double G4PAIxSection::GetIntegralPAIdEdx(G4int i) const
293 {
294 if(i < 1 || i > fSplineNumber) { CallError(i, "GetIntegralPAIdEdx"); }
295 return fIntegralPAIdEdx[i];
296 }
297
298 inline G4double G4PAIxSection::GetIntegralCerenkov(G4int i) const
299 {
300 if(i < 1 || i > fSplineNumber) { CallError(i, "GetIntegralCerenkov"); }
301 return fIntegralCerenkov[i];
302 }
303
304 inline G4double G4PAIxSection::GetIntegralMM(G4int i) const
305 {
306 if(i < 1 || i > fSplineNumber) { CallError(i, "GetIntegralMM"); }
307 return fIntegralMM[i];
308 }
309
310 inline G4double G4PAIxSection::GetIntegralPlasmon(G4int i) const
311 {
312 if(i < 1 || i > fSplineNumber) { CallError(i, "GetIntegralPlasmon"); }
313 return fIntegralPlasmon[i];
314 }
315
316 inline G4double G4PAIxSection::GetIntegralResonance(G4int i) const
317 {
318 if(i < 1 || i > fSplineNumber) { CallError(i, "GetIntegralResonance"); }
319 return fIntegralResonance[i];
320 }
321
322 #endif
323
324 // ----------------- end of G4PAIxSection header file -------------------
325