source: trunk/source/processes/electromagnetic/standard/include/G4PAIxSection.hh @ 846

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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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