| Geant4 Cross Reference |
1 // 1 //
2 // ******************************************* 2 // ********************************************************************
3 // * License and Disclaimer 3 // * License and Disclaimer *
4 // * 4 // * *
5 // * The Geant4 software is copyright of th 5 // * The Geant4 software is copyright of the Copyright Holders of *
6 // * the Geant4 Collaboration. It is provided 6 // * the Geant4 Collaboration. It is provided under the terms and *
7 // * conditions of the Geant4 Software License 7 // * conditions of the Geant4 Software License, included in the file *
8 // * LICENSE and available at http://cern.ch/ 8 // * LICENSE and available at http://cern.ch/geant4/license . These *
9 // * include a list of copyright holders. 9 // * include a list of copyright holders. *
10 // * 10 // * *
11 // * Neither the authors of this software syst 11 // * Neither the authors of this software system, nor their employing *
12 // * institutes,nor the agencies providing fin 12 // * institutes,nor the agencies providing financial support for this *
13 // * work make any representation or warran 13 // * work make any representation or warranty, express or implied, *
14 // * regarding this software system or assum 14 // * regarding this software system or assume any liability for its *
15 // * use. Please see the license in the file 15 // * use. Please see the license in the file LICENSE and URL above *
16 // * for the full disclaimer and the limitatio 16 // * for the full disclaimer and the limitation of liability. *
17 // * 17 // * *
18 // * This code implementation is the result 18 // * This code implementation is the result of the scientific and *
19 // * technical work of the GEANT4 collaboratio 19 // * technical work of the GEANT4 collaboration. *
20 // * By using, copying, modifying or distri 20 // * By using, copying, modifying or distributing the software (or *
21 // * any work based on the software) you ag 21 // * any work based on the software) you agree to acknowledge its *
22 // * use in resulting scientific publicati 22 // * use in resulting scientific publications, and indicate your *
23 // * acceptance of all terms of the Geant4 Sof 23 // * acceptance of all terms of the Geant4 Software license. *
24 // ******************************************* 24 // ********************************************************************
25 // 25 //
>> 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 37 // 3rd version 28.07.05, P.Gumplinger add G4ProcessType to constructor
36 38
37 //#include <cmath> <<
38 39
39 #include "G4TransitionRadiation.hh" << 40 #include <cmath>
40 41
>> 42 #include "G4TransitionRadiation.hh"
>> 43 #include "G4Material.hh"
41 #include "G4EmProcessSubType.hh" 44 #include "G4EmProcessSubType.hh"
42 45
>> 46 // Local constants
>> 47
>> 48 const G4int G4TransitionRadiation::fSympsonNumber = 100 ;
>> 49 const G4int G4TransitionRadiation::fGammaNumber = 15 ;
>> 50 const G4int G4TransitionRadiation::fPointNumber = 100 ;
>> 51
>> 52
43 ////////////////////////////////////////////// 53 ///////////////////////////////////////////////////////////////////////
>> 54 //
44 // Constructor for selected couple of material 55 // Constructor for selected couple of materials
45 G4TransitionRadiation::G4TransitionRadiation(c << 56 //
46 G << 57
>> 58 G4TransitionRadiation::
>> 59 G4TransitionRadiation( const G4String& processName, G4ProcessType type )
47 : G4VDiscreteProcess(processName, type) 60 : G4VDiscreteProcess(processName, type)
48 { 61 {
49 SetProcessSubType(fTransitionRadiation); 62 SetProcessSubType(fTransitionRadiation);
50 fMatIndex1 = fMatIndex2 = 0; 63 fMatIndex1 = fMatIndex2 = 0;
51 64
52 fGamma = fEnergy = fVarAngle = fMinEnergy = << 65 fGamma = fEnergy = fVarAngle = fMinEnergy = fMaxEnergy = fMaxTheta = fSigma1 = fSigma2 = 0.0;
53 fSigma1 = fSigma2 = 0.0; <<
54 } 66 }
55 67
56 ////////////////////////////////////////////// 68 //////////////////////////////////////////////////////////////////////
>> 69 //
57 // Destructor 70 // Destructor
58 G4TransitionRadiation::~G4TransitionRadiation( << 71 //
59 72
60 void G4TransitionRadiation::ProcessDescription << 73 G4TransitionRadiation::~G4TransitionRadiation()
61 { << 74 {}
62 out << "Base class for simulation of x-ray t <<
63 } <<
64 75
65 G4bool G4TransitionRadiation::IsApplicable( << 76 G4bool
66 const G4ParticleDefinition& aParticleType) << 77 G4TransitionRadiation::IsApplicable(const G4ParticleDefinition& aParticleType)
67 { 78 {
68 return (aParticleType.GetPDGCharge() != 0.0) << 79 return ( aParticleType.GetPDGCharge() != 0.0 );
69 } 80 }
70 81
71 G4double G4TransitionRadiation::GetMeanFreePat << 82 G4double G4TransitionRadiation::GetMeanFreePath(const G4Track&,
72 << 83 G4double,
>> 84 G4ForceCondition* condition)
73 { 85 {
74 *condition = Forced; 86 *condition = Forced;
75 return DBL_MAX; // so TR doesn't limit mean << 87 return DBL_MAX; // so TR doesn't limit mean free path
76 } 88 }
77 89
78 G4VParticleChange* G4TransitionRadiation::Post 90 G4VParticleChange* G4TransitionRadiation::PostStepDoIt(const G4Track&,
79 << 91 const G4Step&)
80 { 92 {
81 ClearNumberOfInteractionLengthLeft(); 93 ClearNumberOfInteractionLengthLeft();
82 return &aParticleChange; 94 return &aParticleChange;
83 } 95 }
84 96
85 ////////////////////////////////////////////// 97 ///////////////////////////////////////////////////////////////////
>> 98 //
86 // Sympson integral of TR spectral-angle densi 99 // Sympson integral of TR spectral-angle density over energy between
87 // the limits energy 1 and energy2 at fixed va 100 // the limits energy 1 and energy2 at fixed varAngle = 1 - std::cos(Theta)
88 G4double G4TransitionRadiation::IntegralOverEn << 101
89 << 102 G4double
90 << 103 G4TransitionRadiation::IntegralOverEnergy( G4double energy1,
91 { << 104 G4double energy2,
92 G4int i; << 105 G4double varAngle ) const
93 G4double h, sumEven = 0.0, sumOdd = 0.0; << 106 {
94 h = 0.5 * (energy2 - energy1) / fSympsonNumb << 107 G4int i ;
95 for(i = 1; i < fSympsonNumber; i++) << 108 G4double h , sumEven = 0.0 , sumOdd = 0.0 ;
>> 109 h = 0.5*(energy2 - energy1)/fSympsonNumber ;
>> 110 for(i=1;i<fSympsonNumber;i++)
96 { 111 {
97 sumEven += SpectralAngleTRdensity(energy1 << 112 sumEven += SpectralAngleTRdensity(energy1 + 2*i*h,varAngle) ;
98 sumOdd += SpectralAngleTRdensity(energy1 + << 113 sumOdd += SpectralAngleTRdensity(energy1 + (2*i - 1)*h,varAngle) ;
99 } 114 }
100 sumOdd += << 115 sumOdd += SpectralAngleTRdensity(energy1 + (2*fSympsonNumber - 1)*h,varAngle) ;
101 SpectralAngleTRdensity(energy1 + (2 * fSym << 116 return h*( SpectralAngleTRdensity(energy1,varAngle)
102 return h * << 117 + SpectralAngleTRdensity(energy2,varAngle)
103 (SpectralAngleTRdensity(energy1, varA << 118 + 4.0*sumOdd + 2.0*sumEven )/3.0 ;
104 SpectralAngleTRdensity(energy2, varA <<
105 2.0 * sumEven) / <<
106 3.0; <<
107 } 119 }
108 120
>> 121
>> 122
109 ////////////////////////////////////////////// 123 ///////////////////////////////////////////////////////////////////
>> 124 //
110 // Sympson integral of TR spectral-angle densi 125 // Sympson integral of TR spectral-angle density over energy between
111 // the limits varAngle1 and varAngle2 at fixed 126 // the limits varAngle1 and varAngle2 at fixed energy
112 G4double G4TransitionRadiation::IntegralOverAn << 127
113 << 128 G4double
114 << 129 G4TransitionRadiation::IntegralOverAngle( G4double energy,
115 { << 130 G4double varAngle1,
116 G4int i; << 131 G4double varAngle2 ) const
117 G4double h, sumEven = 0.0, sumOdd = 0.0; << 132 {
118 h = 0.5 * (varAngle2 - varAngle1) / fSympson << 133 G4int i ;
119 for(i = 1; i < fSympsonNumber; ++i) << 134 G4double h , sumEven = 0.0 , sumOdd = 0.0 ;
>> 135 h = 0.5*(varAngle2 - varAngle1)/fSympsonNumber ;
>> 136 for(i=1;i<fSympsonNumber;i++)
120 { 137 {
121 sumEven += SpectralAngleTRdensity(energy, << 138 sumEven += SpectralAngleTRdensity(energy,varAngle1 + 2*i*h) ;
122 sumOdd += SpectralAngleTRdensity(energy, v << 139 sumOdd += SpectralAngleTRdensity(energy,varAngle1 + (2*i - 1)*h) ;
123 } 140 }
124 sumOdd += << 141 sumOdd += SpectralAngleTRdensity(energy,varAngle1 + (2*fSympsonNumber - 1)*h) ;
125 SpectralAngleTRdensity(energy, varAngle1 + <<
126 142
127 return h * << 143 return h*( SpectralAngleTRdensity(energy,varAngle1)
128 (SpectralAngleTRdensity(energy, varAn << 144 + SpectralAngleTRdensity(energy,varAngle2)
129 SpectralAngleTRdensity(energy, varAn << 145 + 4.0*sumOdd + 2.0*sumEven )/3.0 ;
130 2.0 * sumEven) / <<
131 3.0; <<
132 } 146 }
133 147
134 ////////////////////////////////////////////// 148 ///////////////////////////////////////////////////////////////////
>> 149 //
135 // The number of transition radiation photons 150 // The number of transition radiation photons generated in the
136 // angle interval between varAngle1 and varAng 151 // angle interval between varAngle1 and varAngle2
137 G4double G4TransitionRadiation::AngleIntegralD << 152 //
138 G4double varAngle1, G4double varAngle2) cons << 153
139 { << 154 G4double G4TransitionRadiation::
140 G4int i; << 155 AngleIntegralDistribution( G4double varAngle1,
141 G4double h, sumEven = 0.0, sumOdd = 0.0; << 156 G4double varAngle2 ) const
142 h = 0.5 * (varAngle2 - varAngle1) / fSympson << 157 {
143 for(i = 1; i < fSympsonNumber; ++i) << 158 G4int i ;
>> 159 G4double h , sumEven = 0.0 , sumOdd = 0.0 ;
>> 160 h = 0.5*(varAngle2 - varAngle1)/fSympsonNumber ;
>> 161 for(i=1;i<fSympsonNumber;i++)
144 { 162 {
145 sumEven += IntegralOverEnergy(fMinEnergy, << 163 sumEven += IntegralOverEnergy(fMinEnergy,
146 fMinEnergy + << 164 fMinEnergy +0.3*(fMaxEnergy-fMinEnergy),
147 varAngle1 + << 165 varAngle1 + 2*i*h)
148 IntegralOverEnergy(fMinEnergy + << 166 + IntegralOverEnergy(fMinEnergy + 0.3*(fMaxEnergy - fMinEnergy),
149 fMaxEnergy, << 167 fMaxEnergy,
150 sumOdd += IntegralOverEnergy(fMinEnergy, << 168 varAngle1 + 2*i*h);
151 fMinEnergy + << 169 sumOdd += IntegralOverEnergy(fMinEnergy,
152 varAngle1 + ( << 170 fMinEnergy + 0.3*(fMaxEnergy - fMinEnergy),
153 IntegralOverEnergy(fMinEnergy + << 171 varAngle1 + (2*i - 1)*h)
154 fMaxEnergy, v << 172 + IntegralOverEnergy(fMinEnergy + 0.3*(fMaxEnergy - fMinEnergy),
>> 173 fMaxEnergy,
>> 174 varAngle1 + (2*i - 1)*h) ;
155 } 175 }
156 sumOdd += << 176 sumOdd += IntegralOverEnergy(fMinEnergy,
157 IntegralOverEnergy(fMinEnergy, fMinEnergy << 177 fMinEnergy + 0.3*(fMaxEnergy - fMinEnergy),
158 varAngle1 + (2 * fSymps << 178 varAngle1 + (2*fSympsonNumber - 1)*h)
159 IntegralOverEnergy(fMinEnergy + 0.3 * (fMa << 179 + IntegralOverEnergy(fMinEnergy + 0.3*(fMaxEnergy - fMinEnergy),
160 varAngle1 + (2 * fSymps << 180 fMaxEnergy,
161 << 181 varAngle1 + (2*fSympsonNumber - 1)*h) ;
162 return h * << 182
163 (IntegralOverEnergy(fMinEnergy, << 183 return h*(IntegralOverEnergy(fMinEnergy,
164 fMinEnergy + 0.3 << 184 fMinEnergy + 0.3*(fMaxEnergy - fMinEnergy),
165 varAngle1) + << 185 varAngle1)
166 IntegralOverEnergy(fMinEnergy + 0.3 << 186 + IntegralOverEnergy(fMinEnergy + 0.3*(fMaxEnergy - fMinEnergy),
167 fMaxEnergy, varAn << 187 fMaxEnergy,
168 IntegralOverEnergy(fMinEnergy, << 188 varAngle1)
169 fMinEnergy + 0.3 << 189 + IntegralOverEnergy(fMinEnergy,
170 varAngle2) + << 190 fMinEnergy + 0.3*(fMaxEnergy - fMinEnergy),
171 IntegralOverEnergy(fMinEnergy + 0.3 << 191 varAngle2)
172 fMaxEnergy, varAn << 192 + IntegralOverEnergy(fMinEnergy + 0.3*(fMaxEnergy - fMinEnergy),
173 4.0 * sumOdd + 2.0 * sumEven) / << 193 fMaxEnergy,
174 3.0; << 194 varAngle2)
>> 195 + 4.0*sumOdd + 2.0*sumEven )/3.0 ;
175 } 196 }
176 197
177 ////////////////////////////////////////////// 198 ///////////////////////////////////////////////////////////////////
>> 199 //
178 // The number of transition radiation photons, 200 // The number of transition radiation photons, generated in the
179 // energy interval between energy1 and energy2 201 // energy interval between energy1 and energy2
180 G4double G4TransitionRadiation::EnergyIntegral << 202 //
181 G4double energy1, G4double energy2) const << 203
182 { << 204 G4double G4TransitionRadiation::
183 G4int i; << 205 EnergyIntegralDistribution( G4double energy1,
184 G4double h, sumEven = 0.0, sumOdd = 0.0; << 206 G4double energy2 ) const
185 h = 0.5 * (energy2 - energy1) / fSympsonNumb << 207 {
186 for(i = 1; i < fSympsonNumber; ++i) << 208 G4int i ;
>> 209 G4double h , sumEven = 0.0 , sumOdd = 0.0 ;
>> 210 h = 0.5*(energy2 - energy1)/fSympsonNumber ;
>> 211 for(i=1;i<fSympsonNumber;i++)
187 { 212 {
188 sumEven += << 213 sumEven += IntegralOverAngle(energy1 + 2*i*h,0.0,0.01*fMaxTheta )
189 IntegralOverAngle(energy1 + 2 * i * h, 0 << 214 + IntegralOverAngle(energy1 + 2*i*h,0.01*fMaxTheta,fMaxTheta);
190 IntegralOverAngle(energy1 + 2 * i * h, 0 << 215 sumOdd += IntegralOverAngle(energy1 + (2*i - 1)*h,0.0,0.01*fMaxTheta)
191 sumOdd += << 216 + IntegralOverAngle(energy1 + (2*i - 1)*h,0.01*fMaxTheta,fMaxTheta) ;
192 IntegralOverAngle(energy1 + (2 * i - 1) <<
193 IntegralOverAngle(energy1 + (2 * i - 1) <<
194 } 217 }
195 sumOdd += IntegralOverAngle(energy1 + (2 * f << 218 sumOdd += IntegralOverAngle(energy1 + (2*fSympsonNumber - 1)*h,
196 0.01 * fMaxTheta << 219 0.0,0.01*fMaxTheta)
197 IntegralOverAngle(energy1 + (2 * f << 220 + IntegralOverAngle(energy1 + (2*fSympsonNumber - 1)*h,
198 0.01 * fMaxTheta << 221 0.01*fMaxTheta,fMaxTheta) ;
199 << 222
200 return h * << 223 return h*(IntegralOverAngle(energy1,0.0,0.01*fMaxTheta)
201 (IntegralOverAngle(energy1, 0.0, 0.01 << 224 + IntegralOverAngle(energy1,0.01*fMaxTheta,fMaxTheta)
202 IntegralOverAngle(energy1, 0.01 * fM << 225 + IntegralOverAngle(energy2,0.0,0.01*fMaxTheta)
203 IntegralOverAngle(energy2, 0.0, 0.01 << 226 + IntegralOverAngle(energy2,0.01*fMaxTheta,fMaxTheta)
204 IntegralOverAngle(energy2, 0.01 * fM << 227 + 4.0*sumOdd + 2.0*sumEven )/3.0 ;
205 4.0 * sumOdd + 2.0 * sumEven) / <<
206 3.0; <<
207 } 228 }
>> 229
>> 230 // end of G4TransitionRadiation implementation file --------------------------
208 231