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25 //
26 // G4PAIySection.hh -- header file
27 //
28 //
29 // Preparation of ionizing collision cross section according to Photo Absorption
30 // Ionization (PAI) model for simulation of ionization energy losses in very thin
31 // absorbers. Author: Vladimir.Grichine@cern.ch
32 //
33 // History:
34 //
35 // 01.10.07, V.Ivanchenko create using V.Grichine G4PAIxSection class
36 // 21.11.10, V.Grichine fVerbose and SetVerbose added
37 // 28.10.11, V.Ivanchenko Migration of exceptions to the new design
38
39 #ifndef G4PAIYSECTION_HH
40 #define G4PAIYSECTION_HH
41
42 #include "G4ios.hh"
43 #include "globals.hh"
44 #include "Randomize.hh"
45
46 #include "G4SandiaTable.hh"
47
48 class G4PAIySection
49 {
50 public:
51
52 explicit G4PAIySection();
53
54 ~G4PAIySection() = default;
55
56 void Initialize(const G4Material* material, G4double maxEnergyTransfer,
57 G4double betaGammaSq, G4SandiaTable*);
58
59 void ComputeLowEnergyCof(const G4Material* material);
60
61 void InitPAI();
62
63 void NormShift( G4double betaGammaSq );
64
65 void SplainPAI( G4double betaGammaSq );
66
67 // Physical methods
68 G4double RutherfordIntegral( G4int intervalNumber,
69 G4double limitLow,
70 G4double limitHigh );
71
72 G4double ImPartDielectricConst( G4int intervalNumber,
73 G4double energy );
74
75 G4double RePartDielectricConst(G4double energy);
76
77 G4double DifPAIySection( G4int intervalNumber,
78 G4double betaGammaSq );
79
80 G4double PAIdNdxCerenkov( G4int intervalNumber,
81 G4double betaGammaSq );
82
83 G4double PAIdNdxPlasmon( G4int intervalNumber,
84 G4double betaGammaSq );
85
86 void IntegralPAIySection();
87 void IntegralCerenkov();
88 void IntegralPlasmon();
89
90 G4double SumOverInterval(G4int intervalNumber);
91 G4double SumOverIntervaldEdx(G4int intervalNumber);
92 G4double SumOverInterCerenkov(G4int intervalNumber);
93 G4double SumOverInterPlasmon(G4int intervalNumber);
94
95 G4double SumOverBorder( G4int intervalNumber,
96 G4double energy );
97 G4double SumOverBorderdEdx( G4int intervalNumber,
98 G4double energy );
99 G4double SumOverBordCerenkov( G4int intervalNumber,
100 G4double energy );
101 G4double SumOverBordPlasmon( G4int intervalNumber,
102 G4double energy );
103
104 G4double GetStepEnergyLoss( G4double step );
105 G4double GetStepCerenkovLoss( G4double step );
106 G4double GetStepPlasmonLoss( G4double step );
107
108 G4double GetLorentzFactor(G4int j) const;
109
110 // Inline access functions
111
112 inline G4int GetNumberOfGammas() const { return fNumberOfGammas; }
113
114 inline G4int GetSplineSize() const { return fSplineNumber; }
115
116 inline G4int GetIntervalNumber() const { return fIntervalNumber; }
117
118 inline G4double GetEnergyInterval(G4int i){ return fEnergyInterval[i]; }
119
120 inline G4double GetDifPAIySection(G4int i){ return fDifPAIySection[i]; }
121 inline G4double GetPAIdNdxCrenkov(G4int i){ return fdNdxCerenkov[i]; }
122 inline G4double GetPAIdNdxPlasmon(G4int i){ return fdNdxPlasmon[i]; }
123
124 inline G4double GetMeanEnergyLoss() const {return fIntegralPAIySection[0]; }
125 inline G4double GetMeanCerenkovLoss() const {return fIntegralCerenkov[0]; }
126 inline G4double GetMeanPlasmonLoss() const {return fIntegralPlasmon[0]; }
127
128 inline G4double GetNormalizationCof() const { return fNormalizationCof; }
129
130 inline G4double GetPAItable(G4int i,G4int j) const;
131
132 inline G4double GetSplineEnergy(G4int i) const;
133
134 inline G4double GetIntegralPAIySection(G4int i) const;
135 inline G4double GetIntegralPAIdEdx(G4int i) const;
136 inline G4double GetIntegralCerenkov(G4int i) const;
137 inline G4double GetIntegralPlasmon(G4int i) const;
138
139 inline void SetVerbose(G4int v) { fVerbose = v; };
140
141 G4PAIySection & operator=(const G4PAIySection &right) = delete;
142 G4PAIySection(const G4PAIySection&) = delete;
143
144 private :
145
146 void CallError(G4int i, const G4String& methodName) const;
147
148 // Local class constants
149
150 static const G4double fDelta; // energy shift from interval border = 0.001
151 static const G4double fError; // error in lin-log approximation = 0.005
152
153 static G4int fNumberOfGammas; // = 111;
154 static const G4double fLorentzFactor[112]; // static gamma array
155
156 static
157 const G4int fRefGammaNumber; // The number of gamma for creation of spline (15)
158
159 G4int fIntervalNumber ; // The number of energy intervals
160 G4double fNormalizationCof; // Normalization cof for PhotoAbsorptionXsection
161
162 G4double betaBohr;
163 G4double betaBohr4;
164
165 G4double fDensity; // Current density
166 G4double fElectronDensity; // Current electron (number) density
167 G4double fLowEnergyCof; // Correction cof for low energy region
168 G4int fSplineNumber; // Current size of spline
169 G4int fVerbose; // verbose flag
170
171 G4SandiaTable* fSandia;
172
173 G4DataVector fEnergyInterval;
174 G4DataVector fA1;
175 G4DataVector fA2;
176 G4DataVector fA3;
177 G4DataVector fA4;
178
179 static
180 const G4int fMaxSplineSize; // Max size of output splain arrays = 500
181
182 G4DataVector fSplineEnergy; // energy points of splain
183 G4DataVector fRePartDielectricConst; // Real part of dielectric const
184 G4DataVector fImPartDielectricConst; // Imaginary part of dielectric const
185 G4DataVector fIntegralTerm; // Integral term in PAI cross section
186 G4DataVector fDifPAIySection; // Differential PAI cross section
187 G4DataVector fdNdxCerenkov; // dNdx of Cerenkov collisions
188 G4DataVector fdNdxPlasmon; // dNdx of Plasmon collisions
189
190 G4DataVector fIntegralPAIySection; // Integral PAI cross section ?
191 G4DataVector fIntegralPAIdEdx; // Integral PAI dEdx ?
192 G4DataVector fIntegralCerenkov; // Integral Cerenkov N>omega ?
193 G4DataVector fIntegralPlasmon; // Integral Plasmon N>omega ?
194
195 G4double fPAItable[500][112]; // Output array
196 };
197
198 inline G4double G4PAIySection::GetPAItable(G4int i, G4int j) const
199 {
200 return fPAItable[i][j];
201 }
202
203 inline G4double G4PAIySection::GetSplineEnergy(G4int i) const
204 {
205 if(i < 1 || i > fSplineNumber) { CallError(i, "GetSplineEnergy"); }
206 return fSplineEnergy[i];
207 }
208
209 inline G4double G4PAIySection::GetIntegralPAIySection(G4int i) const
210 {
211 if(i < 1 || i > fSplineNumber) { CallError(i, "GetIntegralPAIySection"); }
212 return fIntegralPAIySection[i];
213 }
214
215 inline G4double G4PAIySection::GetIntegralPAIdEdx(G4int i) const
216 {
217 if(i < 1 || i > fSplineNumber) { CallError(i, "GetIntegralPAIdEdx"); }
218 return fIntegralPAIdEdx[i];
219 }
220
221 inline G4double G4PAIySection::GetIntegralCerenkov(G4int i) const
222 {
223 if(i < 1 || i > fSplineNumber) { CallError(i, "GetIntegralCerenkov"); }
224 return fIntegralCerenkov[i];
225 }
226
227 inline G4double G4PAIySection::GetIntegralPlasmon(G4int i) const
228 {
229 if(i < 1 || i > fSplineNumber) { CallError(i, "GetIntegralPlasmon"); }
230 return fIntegralPlasmon[i];
231 }
232
233 #endif
234
235 // ----------------- end of G4PAIySection header file -------------------
236