source: trunk/source/processes/electromagnetic/standard/include/G4PAIxSection.hh@ 900

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27// $Id: G4PAIxSection.hh,v 1.12 2006/06/29 19:50:44 gunter Exp $
28// GEANT4 tag $Name: $
29//
30//
31// G4PAIxSection.hh -- header file
32//
33// GEANT 4 class header file --- Copyright CERN 1995
34// CERB Geneva Switzerland
35//
36// for information related to this code, please, contact
37// CERN, CN Division, ASD Group
38//
39// Preparation of ionizing collision cross section according to Photo Absorption
40// Ionization (PAI) model for simulation of ionization energy losses in very thin
41// absorbers. Author: Vladimir.Grichine@cern.ch
42//
43// History:
44//
45// 19.10.03, V. Grichine: Integral dEdx was added for G4PAIModel class
46//
47// 13.05.03, V. Grichine: Numerical instability was fixed in SumOverInterval/Border
48// functions
49// 10.02.02, V. Grichine: New functions and arrays/gets for Cerenkov and
50// plasmon collisions dN/dx
51// 27.10.99, V. Grichine: Bug fixed in constructors, 3rd constructor and
52// GetStepEnergyLoss(step) were added, fDelta = 0.005
53// 30.11.97, V. Grichine: 2nd version
54// 11.06.97, V. Grichine: 1st version
55
56#ifndef G4PAIXSECTION_HH
57#define G4PAIXSECTION_HH
58
59#include "G4ios.hh"
60#include "globals.hh"
61#include "Randomize.hh"
62
63#include"G4SandiaTable.hh"
64
65class G4MaterialCutsCouple;
66class G4Sandiatable;
67
68
69class G4PAIxSection
70{
71public:
72 // Constructors
73 G4PAIxSection( G4MaterialCutsCouple* matCC);
74
75 G4PAIxSection( G4int materialIndex,
76 G4double maxEnergyTransfer ) ;
77
78 G4PAIxSection( G4int materialIndex, // for proton loss table
79 G4double maxEnergyTransfer,
80 G4double betaGammaSq ,
81 G4double** photoAbsCof, G4int intNumber ) ;
82
83 G4PAIxSection( G4int materialIndex, // test constructor
84 G4double maxEnergyTransfer,
85 G4double betaGammaSq ) ;
86
87 // G4PAIxSection(const G4PAIxSection& right) ;
88
89 // Destructor
90
91 ~G4PAIxSection() ;
92
93 // Operators
94 // G4PAIxSection& operator=(const G4PAIxSection& right) ;
95 // G4int operator==(const G4PAIxSection& right)const ;
96 // G4int operator!=(const G4PAIxSection& right)const ;
97
98 // Methods
99
100 // General control functions
101
102 void InitPAI() ;
103
104 void NormShift( G4double betaGammaSq ) ;
105
106 void SplainPAI( G4double betaGammaSq ) ;
107
108 // Physical methods
109
110
111 G4double RutherfordIntegral( G4int intervalNumber,
112 G4double limitLow,
113 G4double limitHigh ) ;
114
115 G4double ImPartDielectricConst( G4int intervalNumber,
116 G4double energy ) ;
117
118 G4double RePartDielectricConst(G4double energy) ;
119
120 G4double DifPAIxSection( G4int intervalNumber,
121 G4double betaGammaSq ) ;
122
123 G4double PAIdNdxCerenkov( G4int intervalNumber,
124 G4double betaGammaSq ) ;
125
126 G4double PAIdNdxPlasmon( G4int intervalNumber,
127 G4double betaGammaSq ) ;
128
129 void IntegralPAIxSection() ;
130 void IntegralCerenkov() ;
131 void IntegralPlasmon() ;
132
133 G4double SumOverInterval(G4int intervalNumber) ;
134 G4double SumOverIntervaldEdx(G4int intervalNumber) ;
135 G4double SumOverInterCerenkov(G4int intervalNumber) ;
136 G4double SumOverInterPlasmon(G4int intervalNumber) ;
137
138 G4double SumOverBorder( G4int intervalNumber,
139 G4double energy ) ;
140 G4double SumOverBorderdEdx( G4int intervalNumber,
141 G4double energy ) ;
142 G4double SumOverBordCerenkov( G4int intervalNumber,
143 G4double energy ) ;
144 G4double SumOverBordPlasmon( G4int intervalNumber,
145 G4double energy ) ;
146
147 G4double GetStepEnergyLoss( G4double step ) ;
148 G4double GetStepCerenkovLoss( G4double step ) ;
149 G4double GetStepPlasmonLoss( G4double step ) ;
150
151 // Inline access functions
152
153 G4int GetNumberOfGammas() const { return fNumberOfGammas ; }
154
155 G4int GetSplineSize() const { return fSplineNumber ; }
156
157 G4int GetIntervalNumber() const { return fIntervalNumber ; }
158
159 G4double GetEnergyInterval(G4int i){ return fEnergyInterval[i] ; }
160
161 G4double GetDifPAIxSection(G4int i){ return fDifPAIxSection[i] ; }
162 G4double GetPAIdNdxCrenkov(G4int i){ return fdNdxCerenkov[i] ; }
163 G4double GetPAIdNdxPlasmon(G4int i){ return fdNdxPlasmon[i] ; }
164
165 G4double GetMeanEnergyLoss() const {return fIntegralPAIxSection[0] ; }
166 G4double GetMeanCerenkovLoss() const {return fIntegralCerenkov[0] ; }
167 G4double GetMeanPlasmonLoss() const {return fIntegralPlasmon[0] ; }
168
169 G4double GetNormalizationCof() const { return fNormalizationCof ; }
170
171 inline G4double GetPAItable(G4int i,G4int j) const ;
172
173 inline G4double GetLorentzFactor(G4int i) const ;
174
175 inline G4double GetSplineEnergy(G4int i) const ;
176
177 inline G4double GetIntegralPAIxSection(G4int i) const ;
178 inline G4double GetIntegralPAIdEdx(G4int i) const ;
179 inline G4double GetIntegralCerenkov(G4int i) const ;
180 inline G4double GetIntegralPlasmon(G4int i) const ;
181
182protected :
183
184private :
185
186// Local class constants
187
188static const G4double fDelta ; // energy shift from interval border = 0.001
189static const G4double fError ; // error in lin-log approximation = 0.005
190
191static G4int fNumberOfGammas ; // = 111 ;
192static const G4double fLorentzFactor[112] ; // static gamma array
193
194static
195const G4int fRefGammaNumber ; // The number of gamma for creation of spline (15)
196
197G4int fIntervalNumber ; // The number of energy intervals
198G4double fNormalizationCof ; // Normalization cof for PhotoAbsorptionXsection
199
200// G4double fBetaGammaSq ; // (beta*gamma)^2
201
202G4double fDensity ; // Current density
203G4double fElectronDensity ; // Current electron (number) density
204G4int fSplineNumber ; // Current size of spline
205
206// Arrays of Sandia coefficients
207
208 G4OrderedTable* fMatSandiaMatrix;
209 G4SandiaTable* fSandia;
210
211G4double* fEnergyInterval ;
212G4double* fA1 ;
213G4double* fA2 ;
214G4double* fA3 ;
215G4double* fA4 ;
216
217static
218const G4int fMaxSplineSize ; // Max size of output splain arrays = 500
219
220/* ******************
221G4double* fSplineEnergy ; // energy points of splain
222G4double* fRePartDielectricConst ; // Real part of dielectric const
223G4double* fImPartDielectricConst ; // Imaginary part of dielectric const
224G4double* fIntegralTerm ; // Integral term in PAI cross section
225G4double* fDifPAIxSection ; // Differential PAI cross section
226G4double* fIntegralPAIxSection ; // Integral PAI cross section ?
227*/ ///////////////
228
229
230G4double fSplineEnergy[500] ; // energy points of splain
231G4double fRePartDielectricConst[500] ; // Real part of dielectric const
232G4double fImPartDielectricConst[500] ; // Imaginary part of dielectric const
233G4double fIntegralTerm[500] ; // Integral term in PAI cross section
234G4double fDifPAIxSection[500] ; // Differential PAI cross section
235G4double fdNdxCerenkov[500] ; // dNdx of Cerenkov collisions
236G4double fdNdxPlasmon[500] ; // dNdx of Plasmon collisions
237
238G4double fIntegralPAIxSection[500] ; // Integral PAI cross section ?
239G4double fIntegralPAIdEdx[500] ; // Integral PAI dEdx ?
240G4double fIntegralCerenkov[500] ; // Integral Cerenkov N>omega ?
241G4double fIntegralPlasmon[500] ; // Integral Plasmon N>omega ?
242
243G4double fPAItable[500][112] ; // Output array
244
245} ;
246
247//////////////// Inline methods //////////////////////////////////
248//
249
250
251inline G4double G4PAIxSection::GetPAItable(G4int i, G4int j) const
252{
253 return fPAItable[i][j] ;
254}
255
256inline G4double G4PAIxSection::GetLorentzFactor(G4int j) const
257{
258 return fLorentzFactor[j] ;
259}
260
261inline G4double G4PAIxSection::GetSplineEnergy(G4int i) const
262{
263 if(i < 1 || i > fSplineNumber)
264 {
265 G4Exception("Invalid argument in G4PAIxSection::GetSplineEnergy");
266 }
267 return fSplineEnergy[i] ;
268}
269
270inline G4double G4PAIxSection::GetIntegralPAIxSection(G4int i) const
271{
272 if(i < 1 || i > fSplineNumber)
273 {
274 G4Exception("Invalid argument in G4PAIxSection::GetIntegralPAIxSection");
275 }
276 return fIntegralPAIxSection[i] ;
277}
278
279inline G4double G4PAIxSection::GetIntegralPAIdEdx(G4int i) const
280{
281 if(i < 1 || i > fSplineNumber)
282 {
283 G4Exception("Invalid argument in G4PAIxSection::GetIntegralPAIxSection");
284 }
285 return fIntegralPAIdEdx[i] ;
286}
287
288inline G4double G4PAIxSection::GetIntegralCerenkov(G4int i) const
289{
290 if(i < 1 || i > fSplineNumber)
291 {
292 G4Exception("Invalid argument in G4PAIxSection::GetIntegralCerenkov");
293 }
294 return fIntegralCerenkov[i] ;
295}
296
297inline G4double G4PAIxSection::GetIntegralPlasmon(G4int i) const
298{
299 if(i < 1 || i > fSplineNumber)
300 {
301 G4Exception("Invalid argument in G4PAIxSection::GetIntegralPlasmon");
302 }
303 return fIntegralPlasmon[i] ;
304}
305
306#endif
307
308// ----------------- end of G4PAIxSection header file -------------------
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