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25 // 25 //
>> 26 //
>> 27 // $Id: G4TransitionRadiation.cc,v 1.7 2006/06/29 19:56:19 gunter Exp $
>> 28 // GEANT4 tag $Name: geant4-09-02 $
>> 29 //
26 // G4TransitionRadiation class -- implementati 30 // G4TransitionRadiation class -- implementation file
27 31
28 // GEANT 4 class implementation file --- Copyr 32 // GEANT 4 class implementation file --- Copyright CERN 1995
>> 33 // CERN Geneva Switzerland
29 34
30 // For information related to this code, pleas 35 // For information related to this code, please, contact
31 // CERN, CN Division, ASD Group 36 // CERN, CN Division, ASD Group
32 // History: 37 // History:
33 // 1st version 11.09.97 V. Grichine (Vladimir. 38 // 1st version 11.09.97 V. Grichine (Vladimir.Grichine@cern.ch )
34 // 2nd version 16.12.97 V. Grichine 39 // 2nd version 16.12.97 V. Grichine
35 // 3rd version 28.07.05, P.Gumplinger add G4Pr 40 // 3rd version 28.07.05, P.Gumplinger add G4ProcessType to constructor
36 41
37 //#include <cmath> << 42
>> 43 #include <cmath>
>> 44 // #include "G4ios.hh"
>> 45 // #include <fstream.h>
>> 46 // #include <stdlib.h>
38 47
39 #include "G4TransitionRadiation.hh" 48 #include "G4TransitionRadiation.hh"
>> 49 #include "G4Material.hh"
>> 50
>> 51 // Init gamma array
>> 52
>> 53
>> 54 // Local constants
40 55
41 #include "G4EmProcessSubType.hh" << 56 const G4int G4TransitionRadiation::fSympsonNumber = 100 ;
>> 57 const G4int G4TransitionRadiation::fGammaNumber = 15 ;
>> 58 const G4int G4TransitionRadiation::fPointNumber = 100 ;
>> 59
>> 60 using namespace std;
42 61
43 ////////////////////////////////////////////// 62 ///////////////////////////////////////////////////////////////////////
>> 63 //
44 // Constructor for selected couple of material 64 // Constructor for selected couple of materials
45 G4TransitionRadiation::G4TransitionRadiation(c << 65 //
46 G << 66
>> 67 G4TransitionRadiation::
>> 68 G4TransitionRadiation( const G4String& processName, G4ProcessType type )
47 : G4VDiscreteProcess(processName, type) 69 : G4VDiscreteProcess(processName, type)
48 { 70 {
49 SetProcessSubType(fTransitionRadiation); << 71 // fMatIndex1 = pMat1->GetIndex() ;
50 fMatIndex1 = fMatIndex2 = 0; << 72 // fMatIndex2 = pMat2->GetIndex() ;
51 <<
52 fGamma = fEnergy = fVarAngle = fMinEnergy = <<
53 fSigma1 = fSigma2 = 0.0; <<
54 } 73 }
55 74
56 ////////////////////////////////////////////// 75 //////////////////////////////////////////////////////////////////////
>> 76 //
57 // Destructor 77 // Destructor
58 G4TransitionRadiation::~G4TransitionRadiation( << 78 //
59 79
60 void G4TransitionRadiation::ProcessDescription << 80 G4TransitionRadiation::~G4TransitionRadiation()
61 { 81 {
62 out << "Base class for simulation of x-ray t << 82 ;
63 } 83 }
64 84
65 G4bool G4TransitionRadiation::IsApplicable( <<
66 const G4ParticleDefinition& aParticleType) <<
67 { <<
68 return (aParticleType.GetPDGCharge() != 0.0) <<
69 } <<
70 <<
71 G4double G4TransitionRadiation::GetMeanFreePat <<
72 <<
73 { <<
74 *condition = Forced; <<
75 return DBL_MAX; // so TR doesn't limit mean <<
76 } <<
77 <<
78 G4VParticleChange* G4TransitionRadiation::Post <<
79 <<
80 { <<
81 ClearNumberOfInteractionLengthLeft(); <<
82 return &aParticleChange; <<
83 } <<
84 85
85 ////////////////////////////////////////////// 86 ///////////////////////////////////////////////////////////////////
>> 87 //
86 // Sympson integral of TR spectral-angle densi 88 // Sympson integral of TR spectral-angle density over energy between
87 // the limits energy 1 and energy2 at fixed va << 89 // the limits energy 1 and energy2 at fixed varAngle = 1 - cos(Theta)
88 G4double G4TransitionRadiation::IntegralOverEn << 90
89 << 91 G4double
90 << 92 G4TransitionRadiation::IntegralOverEnergy( G4double energy1,
91 { << 93 G4double energy2,
92 G4int i; << 94 G4double varAngle ) const
93 G4double h, sumEven = 0.0, sumOdd = 0.0; << 95 {
94 h = 0.5 * (energy2 - energy1) / fSympsonNumb << 96 G4int i ;
95 for(i = 1; i < fSympsonNumber; i++) << 97 G4double h , sumEven = 0.0 , sumOdd = 0.0 ;
>> 98 h = 0.5*(energy2 - energy1)/fSympsonNumber ;
>> 99 for(i=1;i<fSympsonNumber;i++)
96 { 100 {
97 sumEven += SpectralAngleTRdensity(energy1 << 101 sumEven += SpectralAngleTRdensity(energy1 + 2*i*h,varAngle) ;
98 sumOdd += SpectralAngleTRdensity(energy1 + << 102 sumOdd += SpectralAngleTRdensity(energy1 + (2*i - 1)*h,varAngle) ;
99 } 103 }
100 sumOdd += << 104 sumOdd += SpectralAngleTRdensity(energy1 + (2*fSympsonNumber - 1)*h,varAngle) ;
101 SpectralAngleTRdensity(energy1 + (2 * fSym << 105 return h*( SpectralAngleTRdensity(energy1,varAngle)
102 return h * << 106 + SpectralAngleTRdensity(energy2,varAngle)
103 (SpectralAngleTRdensity(energy1, varA << 107 + 4.0*sumOdd + 2.0*sumEven )/3.0 ;
104 SpectralAngleTRdensity(energy2, varA <<
105 2.0 * sumEven) / <<
106 3.0; <<
107 } 108 }
108 109
>> 110
>> 111
109 ////////////////////////////////////////////// 112 ///////////////////////////////////////////////////////////////////
>> 113 //
110 // Sympson integral of TR spectral-angle densi 114 // Sympson integral of TR spectral-angle density over energy between
111 // the limits varAngle1 and varAngle2 at fixed 115 // the limits varAngle1 and varAngle2 at fixed energy
112 G4double G4TransitionRadiation::IntegralOverAn << 116
113 << 117 G4double
114 << 118 G4TransitionRadiation::IntegralOverAngle( G4double energy,
115 { << 119 G4double varAngle1,
116 G4int i; << 120 G4double varAngle2 ) const
117 G4double h, sumEven = 0.0, sumOdd = 0.0; << 121 {
118 h = 0.5 * (varAngle2 - varAngle1) / fSympson << 122 G4int i ;
119 for(i = 1; i < fSympsonNumber; ++i) << 123 G4double h , sumEven = 0.0 , sumOdd = 0.0 ;
>> 124 h = 0.5*(varAngle2 - varAngle1)/fSympsonNumber ;
>> 125 for(i=1;i<fSympsonNumber;i++)
120 { 126 {
121 sumEven += SpectralAngleTRdensity(energy, << 127 sumEven += SpectralAngleTRdensity(energy,varAngle1 + 2*i*h) ;
122 sumOdd += SpectralAngleTRdensity(energy, v << 128 sumOdd += SpectralAngleTRdensity(energy,varAngle1 + (2*i - 1)*h) ;
123 } 129 }
124 sumOdd += << 130 sumOdd += SpectralAngleTRdensity(energy,varAngle1 + (2*fSympsonNumber - 1)*h) ;
125 SpectralAngleTRdensity(energy, varAngle1 + <<
126 131
127 return h * << 132 return h*( SpectralAngleTRdensity(energy,varAngle1)
128 (SpectralAngleTRdensity(energy, varAn << 133 + SpectralAngleTRdensity(energy,varAngle2)
129 SpectralAngleTRdensity(energy, varAn << 134 + 4.0*sumOdd + 2.0*sumEven )/3.0 ;
130 2.0 * sumEven) / <<
131 3.0; <<
132 } 135 }
133 136
134 ////////////////////////////////////////////// 137 ///////////////////////////////////////////////////////////////////
>> 138 //
135 // The number of transition radiation photons 139 // The number of transition radiation photons generated in the
136 // angle interval between varAngle1 and varAng 140 // angle interval between varAngle1 and varAngle2
137 G4double G4TransitionRadiation::AngleIntegralD << 141 //
138 G4double varAngle1, G4double varAngle2) cons << 142
139 { << 143 G4double G4TransitionRadiation::
140 G4int i; << 144 AngleIntegralDistribution( G4double varAngle1,
141 G4double h, sumEven = 0.0, sumOdd = 0.0; << 145 G4double varAngle2 ) const
142 h = 0.5 * (varAngle2 - varAngle1) / fSympson << 146 {
143 for(i = 1; i < fSympsonNumber; ++i) << 147 G4int i ;
>> 148 G4double h , sumEven = 0.0 , sumOdd = 0.0 ;
>> 149 h = 0.5*(varAngle2 - varAngle1)/fSympsonNumber ;
>> 150 for(i=1;i<fSympsonNumber;i++)
144 { 151 {
145 sumEven += IntegralOverEnergy(fMinEnergy, << 152 sumEven += IntegralOverEnergy(fMinEnergy,
146 fMinEnergy + << 153 fMinEnergy +0.3*(fMaxEnergy-fMinEnergy),
147 varAngle1 + << 154 varAngle1 + 2*i*h)
148 IntegralOverEnergy(fMinEnergy + << 155 + IntegralOverEnergy(fMinEnergy + 0.3*(fMaxEnergy - fMinEnergy),
149 fMaxEnergy, << 156 fMaxEnergy,
150 sumOdd += IntegralOverEnergy(fMinEnergy, << 157 varAngle1 + 2*i*h);
151 fMinEnergy + << 158 sumOdd += IntegralOverEnergy(fMinEnergy,
152 varAngle1 + ( << 159 fMinEnergy + 0.3*(fMaxEnergy - fMinEnergy),
153 IntegralOverEnergy(fMinEnergy + << 160 varAngle1 + (2*i - 1)*h)
154 fMaxEnergy, v << 161 + IntegralOverEnergy(fMinEnergy + 0.3*(fMaxEnergy - fMinEnergy),
>> 162 fMaxEnergy,
>> 163 varAngle1 + (2*i - 1)*h) ;
155 } 164 }
156 sumOdd += << 165 sumOdd += IntegralOverEnergy(fMinEnergy,
157 IntegralOverEnergy(fMinEnergy, fMinEnergy << 166 fMinEnergy + 0.3*(fMaxEnergy - fMinEnergy),
158 varAngle1 + (2 * fSymps << 167 varAngle1 + (2*fSympsonNumber - 1)*h)
159 IntegralOverEnergy(fMinEnergy + 0.3 * (fMa << 168 + IntegralOverEnergy(fMinEnergy + 0.3*(fMaxEnergy - fMinEnergy),
160 varAngle1 + (2 * fSymps << 169 fMaxEnergy,
161 << 170 varAngle1 + (2*fSympsonNumber - 1)*h) ;
162 return h * << 171
163 (IntegralOverEnergy(fMinEnergy, << 172 return h*(IntegralOverEnergy(fMinEnergy,
164 fMinEnergy + 0.3 << 173 fMinEnergy + 0.3*(fMaxEnergy - fMinEnergy),
165 varAngle1) + << 174 varAngle1)
166 IntegralOverEnergy(fMinEnergy + 0.3 << 175 + IntegralOverEnergy(fMinEnergy + 0.3*(fMaxEnergy - fMinEnergy),
167 fMaxEnergy, varAn << 176 fMaxEnergy,
168 IntegralOverEnergy(fMinEnergy, << 177 varAngle1)
169 fMinEnergy + 0.3 << 178 + IntegralOverEnergy(fMinEnergy,
170 varAngle2) + << 179 fMinEnergy + 0.3*(fMaxEnergy - fMinEnergy),
171 IntegralOverEnergy(fMinEnergy + 0.3 << 180 varAngle2)
172 fMaxEnergy, varAn << 181 + IntegralOverEnergy(fMinEnergy + 0.3*(fMaxEnergy - fMinEnergy),
173 4.0 * sumOdd + 2.0 * sumEven) / << 182 fMaxEnergy,
174 3.0; << 183 varAngle2)
>> 184 + 4.0*sumOdd + 2.0*sumEven )/3.0 ;
175 } 185 }
176 186
177 ////////////////////////////////////////////// 187 ///////////////////////////////////////////////////////////////////
>> 188 //
178 // The number of transition radiation photons, 189 // The number of transition radiation photons, generated in the
179 // energy interval between energy1 and energy2 190 // energy interval between energy1 and energy2
180 G4double G4TransitionRadiation::EnergyIntegral << 191 //
181 G4double energy1, G4double energy2) const << 192
182 { << 193 G4double G4TransitionRadiation::
183 G4int i; << 194 EnergyIntegralDistribution( G4double energy1,
184 G4double h, sumEven = 0.0, sumOdd = 0.0; << 195 G4double energy2 ) const
185 h = 0.5 * (energy2 - energy1) / fSympsonNumb << 196 {
186 for(i = 1; i < fSympsonNumber; ++i) << 197 G4int i ;
>> 198 G4double h , sumEven = 0.0 , sumOdd = 0.0 ;
>> 199 h = 0.5*(energy2 - energy1)/fSympsonNumber ;
>> 200 for(i=1;i<fSympsonNumber;i++)
187 { 201 {
188 sumEven += << 202 sumEven += IntegralOverAngle(energy1 + 2*i*h,0.0,0.01*fMaxTheta )
189 IntegralOverAngle(energy1 + 2 * i * h, 0 << 203 + IntegralOverAngle(energy1 + 2*i*h,0.01*fMaxTheta,fMaxTheta);
190 IntegralOverAngle(energy1 + 2 * i * h, 0 << 204 sumOdd += IntegralOverAngle(energy1 + (2*i - 1)*h,0.0,0.01*fMaxTheta)
191 sumOdd += << 205 + IntegralOverAngle(energy1 + (2*i - 1)*h,0.01*fMaxTheta,fMaxTheta) ;
192 IntegralOverAngle(energy1 + (2 * i - 1) <<
193 IntegralOverAngle(energy1 + (2 * i - 1) <<
194 } 206 }
195 sumOdd += IntegralOverAngle(energy1 + (2 * f << 207 sumOdd += IntegralOverAngle(energy1 + (2*fSympsonNumber - 1)*h,
196 0.01 * fMaxTheta << 208 0.0,0.01*fMaxTheta)
197 IntegralOverAngle(energy1 + (2 * f << 209 + IntegralOverAngle(energy1 + (2*fSympsonNumber - 1)*h,
198 0.01 * fMaxTheta << 210 0.01*fMaxTheta,fMaxTheta) ;
199 << 211
200 return h * << 212 return h*(IntegralOverAngle(energy1,0.0,0.01*fMaxTheta)
201 (IntegralOverAngle(energy1, 0.0, 0.01 << 213 + IntegralOverAngle(energy1,0.01*fMaxTheta,fMaxTheta)
202 IntegralOverAngle(energy1, 0.01 * fM << 214 + IntegralOverAngle(energy2,0.0,0.01*fMaxTheta)
203 IntegralOverAngle(energy2, 0.0, 0.01 << 215 + IntegralOverAngle(energy2,0.01*fMaxTheta,fMaxTheta)
204 IntegralOverAngle(energy2, 0.01 * fM << 216 + 4.0*sumOdd + 2.0*sumEven )/3.0 ;
205 4.0 * sumOdd + 2.0 * sumEven) / <<
206 3.0; <<
207 } 217 }
>> 218
>> 219
>> 220
>> 221
>> 222 // end of G4TransitionRadiation implementation file --------------------------
208 223