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25 // 22 //
>> 23 //
>> 24 // $Id: G4TransitionRadiation.cc,v 1.3 2001/07/11 10:03:42 gunter Exp $
>> 25 // GEANT4 tag $Name: geant4-04-01 $
>> 26 //
26 // G4TransitionRadiation class -- implementati 27 // G4TransitionRadiation class -- implementation file
27 28
28 // GEANT 4 class implementation file --- Copyr 29 // GEANT 4 class implementation file --- Copyright CERN 1995
>> 30 // CERN Geneva Switzerland
29 31
30 // For information related to this code, pleas 32 // For information related to this code, please, contact
31 // CERN, CN Division, ASD Group 33 // CERN, CN Division, ASD Group
32 // History: 34 // History:
33 // 1st version 11.09.97 V. Grichine (Vladimir. 35 // 1st version 11.09.97 V. Grichine (Vladimir.Grichine@cern.ch )
34 // 2nd version 16.12.97 V. Grichine 36 // 2nd version 16.12.97 V. Grichine
35 // 3rd version 28.07.05, P.Gumplinger add G4Pr <<
36 37
37 //#include <cmath> << 38
>> 39 #include <math.h>
>> 40 // #include "G4ios.hh"
>> 41 // #include <fstream.h>
>> 42 // #include <stdlib.h>
38 43
39 #include "G4TransitionRadiation.hh" 44 #include "G4TransitionRadiation.hh"
>> 45 #include "G4Material.hh"
>> 46
>> 47 // Init gamma array
>> 48
>> 49
>> 50 // Local constants
>> 51
>> 52 const G4int G4TransitionRadiation::fSympsonNumber = 100 ;
>> 53 const G4int G4TransitionRadiation::fGammaNumber = 15 ;
>> 54 const G4int G4TransitionRadiation::fPointNumber = 100 ;
40 55
41 #include "G4EmProcessSubType.hh" <<
42 56
43 ////////////////////////////////////////////// 57 ///////////////////////////////////////////////////////////////////////
>> 58 //
44 // Constructor for selected couple of material 59 // Constructor for selected couple of materials
45 G4TransitionRadiation::G4TransitionRadiation(c << 60 //
46 G <<
47 : G4VDiscreteProcess(processName, type) <<
48 { <<
49 SetProcessSubType(fTransitionRadiation); <<
50 fMatIndex1 = fMatIndex2 = 0; <<
51 61
52 fGamma = fEnergy = fVarAngle = fMinEnergy = << 62 G4TransitionRadiation::
53 fSigma1 = fSigma2 = 0.0; << 63 G4TransitionRadiation( const G4String& processName )
>> 64 : G4VDiscreteProcess(processName)
>> 65 {
>> 66 // fMatIndex1 = pMat1->GetIndex() ;
>> 67 // fMatIndex2 = pMat2->GetIndex() ;
54 } 68 }
55 69
56 ////////////////////////////////////////////// 70 //////////////////////////////////////////////////////////////////////
>> 71 //
57 // Destructor 72 // Destructor
58 G4TransitionRadiation::~G4TransitionRadiation( << 73 //
59 <<
60 void G4TransitionRadiation::ProcessDescription <<
61 { <<
62 out << "Base class for simulation of x-ray t <<
63 } <<
64 <<
65 G4bool G4TransitionRadiation::IsApplicable( <<
66 const G4ParticleDefinition& aParticleType) <<
67 { <<
68 return (aParticleType.GetPDGCharge() != 0.0) <<
69 } <<
70 74
71 G4double G4TransitionRadiation::GetMeanFreePat << 75 G4TransitionRadiation::~G4TransitionRadiation()
72 <<
73 { 76 {
74 *condition = Forced; << 77 ;
75 return DBL_MAX; // so TR doesn't limit mean <<
76 } 78 }
77 79
78 G4VParticleChange* G4TransitionRadiation::Post <<
79 <<
80 { <<
81 ClearNumberOfInteractionLengthLeft(); <<
82 return &aParticleChange; <<
83 } <<
84 80
85 ////////////////////////////////////////////// 81 ///////////////////////////////////////////////////////////////////
>> 82 //
86 // Sympson integral of TR spectral-angle densi 83 // Sympson integral of TR spectral-angle density over energy between
87 // the limits energy 1 and energy2 at fixed va << 84 // the limits energy 1 and energy2 at fixed varAngle = 1 - cos(Theta)
88 G4double G4TransitionRadiation::IntegralOverEn << 85
89 << 86 G4double
90 << 87 G4TransitionRadiation::IntegralOverEnergy( G4double energy1,
91 { << 88 G4double energy2,
92 G4int i; << 89 G4double varAngle ) const
93 G4double h, sumEven = 0.0, sumOdd = 0.0; << 90 {
94 h = 0.5 * (energy2 - energy1) / fSympsonNumb << 91 G4int i ;
95 for(i = 1; i < fSympsonNumber; i++) << 92 G4double h , sumEven = 0.0 , sumOdd = 0.0 ;
>> 93 h = 0.5*(energy2 - energy1)/fSympsonNumber ;
>> 94 for(i=1;i<fSympsonNumber;i++)
96 { 95 {
97 sumEven += SpectralAngleTRdensity(energy1 << 96 sumEven += SpectralAngleTRdensity(energy1 + 2*i*h,varAngle) ;
98 sumOdd += SpectralAngleTRdensity(energy1 + << 97 sumOdd += SpectralAngleTRdensity(energy1 + (2*i - 1)*h,varAngle) ;
99 } 98 }
100 sumOdd += << 99 sumOdd += SpectralAngleTRdensity(energy1 + (2*fSympsonNumber - 1)*h,varAngle) ;
101 SpectralAngleTRdensity(energy1 + (2 * fSym << 100 return h*( SpectralAngleTRdensity(energy1,varAngle)
102 return h * << 101 + SpectralAngleTRdensity(energy2,varAngle)
103 (SpectralAngleTRdensity(energy1, varA << 102 + 4.0*sumOdd + 2.0*sumEven )/3.0 ;
104 SpectralAngleTRdensity(energy2, varA <<
105 2.0 * sumEven) / <<
106 3.0; <<
107 } 103 }
108 104
>> 105
>> 106
109 ////////////////////////////////////////////// 107 ///////////////////////////////////////////////////////////////////
>> 108 //
110 // Sympson integral of TR spectral-angle densi 109 // Sympson integral of TR spectral-angle density over energy between
111 // the limits varAngle1 and varAngle2 at fixed 110 // the limits varAngle1 and varAngle2 at fixed energy
112 G4double G4TransitionRadiation::IntegralOverAn << 111
113 << 112 G4double
114 << 113 G4TransitionRadiation::IntegralOverAngle( G4double energy,
115 { << 114 G4double varAngle1,
116 G4int i; << 115 G4double varAngle2 ) const
117 G4double h, sumEven = 0.0, sumOdd = 0.0; << 116 {
118 h = 0.5 * (varAngle2 - varAngle1) / fSympson << 117 G4int i ;
119 for(i = 1; i < fSympsonNumber; ++i) << 118 G4double h , sumEven = 0.0 , sumOdd = 0.0 ;
>> 119 h = 0.5*(varAngle2 - varAngle1)/fSympsonNumber ;
>> 120 for(i=1;i<fSympsonNumber;i++)
120 { 121 {
121 sumEven += SpectralAngleTRdensity(energy, << 122 sumEven += SpectralAngleTRdensity(energy,varAngle1 + 2*i*h) ;
122 sumOdd += SpectralAngleTRdensity(energy, v << 123 sumOdd += SpectralAngleTRdensity(energy,varAngle1 + (2*i - 1)*h) ;
123 } 124 }
124 sumOdd += << 125 sumOdd += SpectralAngleTRdensity(energy,varAngle1 + (2*fSympsonNumber - 1)*h) ;
125 SpectralAngleTRdensity(energy, varAngle1 + <<
126 126
127 return h * << 127 return h*( SpectralAngleTRdensity(energy,varAngle1)
128 (SpectralAngleTRdensity(energy, varAn << 128 + SpectralAngleTRdensity(energy,varAngle2)
129 SpectralAngleTRdensity(energy, varAn << 129 + 4.0*sumOdd + 2.0*sumEven )/3.0 ;
130 2.0 * sumEven) / <<
131 3.0; <<
132 } 130 }
133 131
134 ////////////////////////////////////////////// 132 ///////////////////////////////////////////////////////////////////
>> 133 //
135 // The number of transition radiation photons 134 // The number of transition radiation photons generated in the
136 // angle interval between varAngle1 and varAng 135 // angle interval between varAngle1 and varAngle2
137 G4double G4TransitionRadiation::AngleIntegralD << 136 //
138 G4double varAngle1, G4double varAngle2) cons << 137
139 { << 138 G4double G4TransitionRadiation::
140 G4int i; << 139 AngleIntegralDistribution( G4double varAngle1,
141 G4double h, sumEven = 0.0, sumOdd = 0.0; << 140 G4double varAngle2 ) const
142 h = 0.5 * (varAngle2 - varAngle1) / fSympson << 141 {
143 for(i = 1; i < fSympsonNumber; ++i) << 142 G4int i ;
>> 143 G4double h , sumEven = 0.0 , sumOdd = 0.0 ;
>> 144 h = 0.5*(varAngle2 - varAngle1)/fSympsonNumber ;
>> 145 for(i=1;i<fSympsonNumber;i++)
144 { 146 {
145 sumEven += IntegralOverEnergy(fMinEnergy, << 147 sumEven += IntegralOverEnergy(fMinEnergy,
146 fMinEnergy + << 148 fMinEnergy +0.3*(fMaxEnergy-fMinEnergy),
147 varAngle1 + << 149 varAngle1 + 2*i*h)
148 IntegralOverEnergy(fMinEnergy + << 150 + IntegralOverEnergy(fMinEnergy + 0.3*(fMaxEnergy - fMinEnergy),
149 fMaxEnergy, << 151 fMaxEnergy,
150 sumOdd += IntegralOverEnergy(fMinEnergy, << 152 varAngle1 + 2*i*h);
151 fMinEnergy + << 153 sumOdd += IntegralOverEnergy(fMinEnergy,
152 varAngle1 + ( << 154 fMinEnergy + 0.3*(fMaxEnergy - fMinEnergy),
153 IntegralOverEnergy(fMinEnergy + << 155 varAngle1 + (2*i - 1)*h)
154 fMaxEnergy, v << 156 + IntegralOverEnergy(fMinEnergy + 0.3*(fMaxEnergy - fMinEnergy),
>> 157 fMaxEnergy,
>> 158 varAngle1 + (2*i - 1)*h) ;
155 } 159 }
156 sumOdd += << 160 sumOdd += IntegralOverEnergy(fMinEnergy,
157 IntegralOverEnergy(fMinEnergy, fMinEnergy << 161 fMinEnergy + 0.3*(fMaxEnergy - fMinEnergy),
158 varAngle1 + (2 * fSymps << 162 varAngle1 + (2*fSympsonNumber - 1)*h)
159 IntegralOverEnergy(fMinEnergy + 0.3 * (fMa << 163 + IntegralOverEnergy(fMinEnergy + 0.3*(fMaxEnergy - fMinEnergy),
160 varAngle1 + (2 * fSymps << 164 fMaxEnergy,
161 << 165 varAngle1 + (2*fSympsonNumber - 1)*h) ;
162 return h * << 166
163 (IntegralOverEnergy(fMinEnergy, << 167 return h*(IntegralOverEnergy(fMinEnergy,
164 fMinEnergy + 0.3 << 168 fMinEnergy + 0.3*(fMaxEnergy - fMinEnergy),
165 varAngle1) + << 169 varAngle1)
166 IntegralOverEnergy(fMinEnergy + 0.3 << 170 + IntegralOverEnergy(fMinEnergy + 0.3*(fMaxEnergy - fMinEnergy),
167 fMaxEnergy, varAn << 171 fMaxEnergy,
168 IntegralOverEnergy(fMinEnergy, << 172 varAngle1)
169 fMinEnergy + 0.3 << 173 + IntegralOverEnergy(fMinEnergy,
170 varAngle2) + << 174 fMinEnergy + 0.3*(fMaxEnergy - fMinEnergy),
171 IntegralOverEnergy(fMinEnergy + 0.3 << 175 varAngle2)
172 fMaxEnergy, varAn << 176 + IntegralOverEnergy(fMinEnergy + 0.3*(fMaxEnergy - fMinEnergy),
173 4.0 * sumOdd + 2.0 * sumEven) / << 177 fMaxEnergy,
174 3.0; << 178 varAngle2)
>> 179 + 4.0*sumOdd + 2.0*sumEven )/3.0 ;
175 } 180 }
176 181
177 ////////////////////////////////////////////// 182 ///////////////////////////////////////////////////////////////////
>> 183 //
178 // The number of transition radiation photons, 184 // The number of transition radiation photons, generated in the
179 // energy interval between energy1 and energy2 185 // energy interval between energy1 and energy2
180 G4double G4TransitionRadiation::EnergyIntegral << 186 //
181 G4double energy1, G4double energy2) const << 187
182 { << 188 G4double G4TransitionRadiation::
183 G4int i; << 189 EnergyIntegralDistribution( G4double energy1,
184 G4double h, sumEven = 0.0, sumOdd = 0.0; << 190 G4double energy2 ) const
185 h = 0.5 * (energy2 - energy1) / fSympsonNumb << 191 {
186 for(i = 1; i < fSympsonNumber; ++i) << 192 G4int i ;
>> 193 G4double h , sumEven = 0.0 , sumOdd = 0.0 ;
>> 194 h = 0.5*(energy2 - energy1)/fSympsonNumber ;
>> 195 for(i=1;i<fSympsonNumber;i++)
187 { 196 {
188 sumEven += << 197 sumEven += IntegralOverAngle(energy1 + 2*i*h,0.0,0.01*fMaxTheta )
189 IntegralOverAngle(energy1 + 2 * i * h, 0 << 198 + IntegralOverAngle(energy1 + 2*i*h,0.01*fMaxTheta,fMaxTheta);
190 IntegralOverAngle(energy1 + 2 * i * h, 0 << 199 sumOdd += IntegralOverAngle(energy1 + (2*i - 1)*h,0.0,0.01*fMaxTheta)
191 sumOdd += << 200 + IntegralOverAngle(energy1 + (2*i - 1)*h,0.01*fMaxTheta,fMaxTheta) ;
192 IntegralOverAngle(energy1 + (2 * i - 1) <<
193 IntegralOverAngle(energy1 + (2 * i - 1) <<
194 } 201 }
195 sumOdd += IntegralOverAngle(energy1 + (2 * f << 202 sumOdd += IntegralOverAngle(energy1 + (2*fSympsonNumber - 1)*h,
196 0.01 * fMaxTheta << 203 0.0,0.01*fMaxTheta)
197 IntegralOverAngle(energy1 + (2 * f << 204 + IntegralOverAngle(energy1 + (2*fSympsonNumber - 1)*h,
198 0.01 * fMaxTheta << 205 0.01*fMaxTheta,fMaxTheta) ;
199 << 206
200 return h * << 207 return h*(IntegralOverAngle(energy1,0.0,0.01*fMaxTheta)
201 (IntegralOverAngle(energy1, 0.0, 0.01 << 208 + IntegralOverAngle(energy1,0.01*fMaxTheta,fMaxTheta)
202 IntegralOverAngle(energy1, 0.01 * fM << 209 + IntegralOverAngle(energy2,0.0,0.01*fMaxTheta)
203 IntegralOverAngle(energy2, 0.0, 0.01 << 210 + IntegralOverAngle(energy2,0.01*fMaxTheta,fMaxTheta)
204 IntegralOverAngle(energy2, 0.01 * fM << 211 + 4.0*sumOdd + 2.0*sumEven )/3.0 ;
205 4.0 * sumOdd + 2.0 * sumEven) / <<
206 3.0; <<
207 } 212 }
>> 213
>> 214
>> 215
>> 216
>> 217 // end of G4TransitionRadiation implementation file --------------------------
208 218