1 | // |
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2 | // ******************************************************************** |
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3 | // * License and Disclaimer * |
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4 | // * * |
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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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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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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 | // $Id: G4PolarizedPEEffectCrossSection.cc,v 1.1 2007/11/01 17:29:09 schaelic Exp $ |
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27 | // GEANT4 tag $Name: geant4-09-03 $ |
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28 | // |
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29 | // GEANT4 Class file |
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30 | // |
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31 | // |
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32 | // File name: G4PolarizedPEEffectCrossSection |
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33 | // |
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34 | // Author: Karim Laihem |
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35 | // |
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36 | // Creation date: 15.03.2007 |
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37 | // |
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38 | // Modifications: |
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39 | // 19-03-07 Modified to fit in g4.8.2 framework (A.Schaelicke) |
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40 | // |
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41 | // Class Description: |
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42 | // |
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43 | #include "G4PolarizedPEEffectCrossSection.hh" |
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44 | //#include "Randomize.hh" |
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45 | |
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46 | using namespace std; |
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47 | |
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48 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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49 | G4PolarizedPEEffectCrossSection::G4PolarizedPEEffectCrossSection() |
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50 | { |
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51 | cout<<"G4PolarizedPEEffectCrossSection() init\n"; |
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52 | |
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53 | } |
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54 | |
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55 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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56 | G4PolarizedPEEffectCrossSection::~G4PolarizedPEEffectCrossSection() |
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57 | {} |
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58 | |
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59 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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60 | void G4PolarizedPEEffectCrossSection::Initialize(G4double aGammaE, |
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61 | G4double aLept0E, |
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62 | G4double sinTheta, |
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63 | const G4StokesVector & beamPol, |
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64 | const G4StokesVector & /*p1*/, |
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65 | G4int /*flag*/) |
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66 | { |
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67 | // cout<<"G4PolarizedPEEffectCrossSection::Initialize()\n"; |
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68 | |
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69 | // G4StokesVector PolarizedPhotoElectricEffect::Transfer_G4StokesVector( |
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70 | // G4double aGammaE, // Incoming Primary Gamma Energy. |
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71 | // G4ThreeVector aGammaDir, // Incoming Primary Gamma Direction. |
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72 | // G4StokesVector beamPol, // Incoming Primary Gamma polarization. |
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73 | // G4double aLept0E, // The Lepton e- of interest Total energy. |
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74 | // G4ThreeVector aParticl_01_Dir, // The Lepton e- of interest direction. |
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75 | // G4double cos_aTetha_Angle // The lepton of interest Scattering angle. |
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76 | // ) |
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77 | |
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78 | // *********************************************************** |
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79 | // ************ added by Karim Polarization transfer to e- in PhotoelectricEffect. |
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80 | // ************ |
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81 | // *********************************************************** |
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82 | G4double Gfactor = aLept0E/electron_mass_c2+1; |
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83 | G4double Gfactor_2 = Gfactor * Gfactor; |
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84 | |
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85 | G4double BETA = sqrt(1. - 1./(Gfactor_2)); |
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86 | |
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87 | G4double Stokes_P3 = beamPol.z() ; |
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88 | |
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89 | G4double m0_c2 = electron_mass_c2; |
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90 | G4double Lept0E = aLept0E/m0_c2+1, Lept0E2 = Lept0E * Lept0E ; |
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91 | G4double GammaE = aGammaE/m0_c2; |
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92 | |
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93 | |
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94 | // G4double cosTheta = cos_aTetha_Angle; |
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95 | // G4double sinTheta = sqrt(1- cos_aTetha_Angle * cos_aTetha_Angle); |
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96 | G4double cosTheta = std::sqrt(1. - sinTheta*sinTheta); |
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97 | |
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98 | G4double D_Lepton0 = (1./GammaE) * ((2./(GammaE*Lept0E*(1-BETA*cosTheta)))-1.); |
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99 | |
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100 | G4double I_Lepton0 = 1.0+D_Lepton0; |
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101 | |
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102 | G4double A_Lepton0 = (Lept0E/(Lept0E+1))*(2.0/(GammaE*Lept0E) |
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103 | + BETA*cosTheta |
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104 | +(2.0/((GammaE*Lept0E2)*(1.0-BETA*cosTheta)))) / I_Lepton0 ; |
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105 | |
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106 | G4double B_Lepton0 = (Lept0E/(Lept0E+1.0)) * BETA * sinTheta * (2.0/(GammaE*Lept0E*(1-BETA*cosTheta))-1.0)/I_Lepton0; |
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107 | |
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108 | G4double Stokes_S1 = (Stokes_P3 * B_Lepton0) ; |
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109 | G4double Stokes_S2 = 0.; |
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110 | G4double Stokes_S3 = (Stokes_P3 * A_Lepton0) ; |
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111 | |
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112 | |
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113 | theFinalElectronPolarization.setX(Stokes_S1); |
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114 | theFinalElectronPolarization.setY(Stokes_S2); |
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115 | theFinalElectronPolarization.setZ(Stokes_S3); |
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116 | |
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117 | if((theFinalElectronPolarization.x()*theFinalElectronPolarization.x() |
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118 | + theFinalElectronPolarization.y()* theFinalElectronPolarization.y() |
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119 | + theFinalElectronPolarization.z()* theFinalElectronPolarization.z())>1) |
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120 | |
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121 | { |
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122 | cout<<"Warning: PhotoelectricEffect Problem in pol-transfer photon to lepton:Px2 + Py2 + Pz2 > 1"<<endl; |
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123 | cout<<"Polarization transfer forced to be total and similar as incoming Photo"<<endl; |
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124 | // *KL* Surprising if it arrives (never seen it up to now) |
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125 | theFinalElectronPolarization = beamPol; // suplement de securite |
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126 | // cout<<"PhotoEffect okay :" |
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127 | // <<"\t"<<(aLept0E-m0_c2)/aGammaE |
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128 | // <<"\t"<<aGammaE |
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129 | // <<"\t"<<aLept0E |
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130 | // <<"\t"<<cos_aTetha_Angle |
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131 | // <<"\t"<<beamPol |
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132 | // <<"\t"<<theFinalElectronPolarization |
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133 | // <<"\t"<<A_Lepton0 |
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134 | // <<endl; |
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135 | } |
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136 | } |
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137 | |
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138 | |
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139 | |
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140 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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141 | |
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142 | G4double G4PolarizedPEEffectCrossSection::XSection(const G4StokesVector & /*pol2*/, |
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143 | const G4StokesVector & /*pol3*/) |
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144 | { |
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145 | cout<<"ERROR dummy routine G4PolarizedPEEffectCrossSection::XSection() called\n"; |
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146 | return 0; |
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147 | } |
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148 | |
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149 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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150 | |
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151 | G4StokesVector G4PolarizedPEEffectCrossSection::GetPol2() |
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152 | { |
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153 | return theFinalElectronPolarization; |
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154 | } |
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155 | |
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156 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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157 | |
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158 | G4StokesVector G4PolarizedPEEffectCrossSection::GetPol3() |
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159 | { |
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160 | return G4StokesVector(); |
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161 | } |
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162 | |
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163 | |
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164 | |
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165 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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166 | |
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167 | |
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168 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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