1 | // |
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2 | // ******************************************************************** |
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3 | // * License and Disclaimer * |
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4 | // * * |
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5 | // * The Geant4 software is copyright of the Copyright Holders of * |
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6 | // * the Geant4 Collaboration. It is provided under the terms and * |
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7 | // * conditions of the Geant4 Software License, included in the file * |
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8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
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9 | // * include a list of copyright holders. * |
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10 | // * * |
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11 | // * Neither the authors of this software system, nor their employing * |
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12 | // * institutes,nor the agencies providing financial support for this * |
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13 | // * work make any representation or warranty, express or implied, * |
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14 | // * regarding this software system or assume any liability for its * |
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15 | // * use. Please see the license in the file LICENSE and URL above * |
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16 | // * for the full disclaimer and the limitation of liability. * |
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17 | // * * |
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18 | // * This code implementation is the result of the scientific and * |
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19 | // * technical work of the GEANT4 collaboration. * |
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20 | // * By using, copying, modifying or distributing the software (or * |
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21 | // * any work based on the software) you agree to acknowledge its * |
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22 | // * use in resulting scientific publications, and indicate your * |
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23 | // * acceptance of all terms of the Geant4 Software license. * |
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24 | // ******************************************************************** |
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25 | // |
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26 | // |
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27 | // $Id: G4SynchrotronRadiation.hh,v 1.4 2006/06/29 19:55:43 gunter Exp $ |
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28 | // GEANT4 tag $Name: geant4-09-03-cand-01 $ |
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29 | // |
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30 | // ------------------------------------------------------------ |
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31 | // GEANT 4 class header file |
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32 | // CERN Geneva Switzerland |
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33 | // |
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34 | // |
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35 | // History: |
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36 | // 21-5-98 1 version , V. Grichine |
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37 | // 28-05-01, V.Ivanchenko minor changes to provide ANSI -wall compilation |
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38 | // 23-05-06, H. Burkhardt: Energy spectrum from function rather than table |
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39 | // |
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40 | // |
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41 | // ------------------------------------------------------------ |
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42 | |
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43 | #ifndef G4SynchrotronRadiation_h |
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44 | #define G4SynchrotronRadiation_h 1 |
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45 | |
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46 | #include "G4ios.hh" |
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47 | #include "globals.hh" |
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48 | #include "Randomize.hh" |
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49 | #include "G4VDiscreteProcess.hh" |
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50 | #include "G4TransportationManager.hh" |
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51 | #include "G4FieldManager.hh" |
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52 | #include "G4Field.hh" |
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53 | #include "G4ThreeVector.hh" |
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54 | #include "G4PropagatorInField.hh" |
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55 | |
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56 | #include "G4Track.hh" |
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57 | #include "G4Step.hh" |
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58 | |
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59 | #include "G4Gamma.hh" |
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60 | #include "G4Electron.hh" |
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61 | #include "G4Positron.hh" |
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62 | |
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63 | |
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64 | class G4SynchrotronRadiation : public G4VDiscreteProcess |
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65 | { |
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66 | public: |
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67 | |
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68 | G4SynchrotronRadiation(const G4String& pName = "SynRad", |
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69 | G4ProcessType type = fElectromagnetic); |
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70 | |
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71 | virtual ~G4SynchrotronRadiation(); |
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72 | |
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73 | G4double GetMeanFreePath( const G4Track& track, |
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74 | G4double previousStepSize, |
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75 | G4ForceCondition* condition ); |
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76 | |
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77 | G4VParticleChange *PostStepDoIt( const G4Track& track, |
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78 | const G4Step& Step ); |
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79 | |
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80 | G4double GetPhotonEnergy( const G4Track& trackData, |
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81 | const G4Step& stepData ); |
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82 | |
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83 | G4double GetRandomEnergySR( G4double, G4double ); |
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84 | |
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85 | G4double InvSynFracInt(G4double x); |
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86 | G4double Chebyshev(G4double a,G4double b,const G4double c[],G4int m,G4double x); |
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87 | G4bool IsApplicable(const G4ParticleDefinition&); |
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88 | void BuildPhysicsTable(const G4ParticleDefinition& ); |
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89 | void PrintInfoDefinition(); |
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90 | |
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91 | private: |
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92 | |
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93 | G4SynchrotronRadiation & operator=(const G4SynchrotronRadiation &right); |
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94 | G4SynchrotronRadiation(const G4SynchrotronRadiation&); |
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95 | |
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96 | G4ParticleDefinition* theGamma; |
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97 | const G4ParticleDefinition* theElectron; |
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98 | const G4ParticleDefinition* thePositron; |
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99 | |
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100 | G4double fLambdaConst; |
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101 | G4double fEnergyConst; |
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102 | |
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103 | G4PropagatorInField* fFieldPropagator; |
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104 | |
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105 | }; |
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106 | |
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107 | ////////////////////////// INLINE METHODS ///////////////////////////// |
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108 | inline G4bool |
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109 | G4SynchrotronRadiation::IsApplicable( const G4ParticleDefinition& particle ) |
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110 | { |
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111 | |
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112 | return ( ( &particle == (const G4ParticleDefinition *)theElectron ) || |
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113 | ( &particle == (const G4ParticleDefinition *)thePositron ) ); |
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114 | |
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115 | // return ( particle.GetPDGCharge() != 0.0 ); |
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116 | } |
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117 | |
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118 | inline G4double G4SynchrotronRadiation::Chebyshev(G4double a,G4double b,const G4double c[],G4int m,G4double x) |
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119 | { |
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120 | G4double y; |
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121 | G4double y2=2.0*(y=(2.0*x-a-b)/(b-a)); // Change of variable. |
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122 | G4double d=0,dd=0; |
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123 | for (G4int j=m-1;j>=1;j--) // Clenshaw's recurrence. |
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124 | { G4double sv=d; |
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125 | d=y2*d-dd+c[j]; |
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126 | dd=sv; |
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127 | } |
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128 | return y*d-dd+0.5*c[0]; |
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129 | } |
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130 | |
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131 | #endif // end of G4SynchrotronRadiation.hh |
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132 | |
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