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 | // ------------------------------------------------------------------- |
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28 | // GEANT 4 class implementation file |
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29 | // |
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30 | // CERN, Geneva, Switzerland |
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31 | // |
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32 | // File name: G4RKPropagation.cc |
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33 | // |
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34 | // Author: Alessandro Brunengo (Alessandro.Brunengo@ge.infn.it) |
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35 | // |
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36 | // Creation date: 6 June 2000 |
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37 | // ------------------------------------------------------------------- |
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38 | #include "G4RKPropagation.hh" |
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39 | // nuclear fields |
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40 | #include "G4VNuclearField.hh" |
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41 | #include "G4ProtonField.hh" |
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42 | #include "G4NeutronField.hh" |
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43 | #include "G4AntiProtonField.hh" |
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44 | #include "G4KaonPlusField.hh" |
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45 | #include "G4KaonMinusField.hh" |
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46 | #include "G4KaonZeroField.hh" |
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47 | #include "G4PionPlusField.hh" |
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48 | #include "G4PionMinusField.hh" |
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49 | #include "G4PionZeroField.hh" |
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50 | #include "G4SigmaPlusField.hh" |
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51 | #include "G4SigmaMinusField.hh" |
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52 | #include "G4SigmaZeroField.hh" |
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53 | // particles properties |
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54 | #include "G4Proton.hh" |
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55 | #include "G4Neutron.hh" |
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56 | #include "G4AntiProton.hh" |
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57 | #include "G4KaonPlus.hh" |
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58 | #include "G4KaonMinus.hh" |
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59 | #include "G4KaonZero.hh" |
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60 | #include "G4PionPlus.hh" |
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61 | #include "G4PionMinus.hh" |
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62 | #include "G4PionZero.hh" |
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63 | #include "G4SigmaPlus.hh" |
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64 | #include "G4SigmaMinus.hh" |
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65 | #include "G4SigmaZero.hh" |
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66 | |
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67 | #include "globals.hh" |
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68 | |
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69 | #include "G4KM_OpticalEqRhs.hh" |
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70 | #include "G4KM_NucleonEqRhs.hh" |
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71 | #include "G4ClassicalRK4.hh" |
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72 | #include "G4MagIntegratorDriver.hh" |
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73 | |
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74 | #include "G4LorentzRotation.hh" |
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75 | |
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76 | // unsigned EncodingHashFun(const G4int& aEncoding); |
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77 | |
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78 | G4RKPropagation::G4RKPropagation() : theNucleus(0), |
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79 | theFieldMap(0), theEquationMap(0), |
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80 | theField(0) |
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81 | { } |
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82 | |
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83 | |
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84 | G4RKPropagation::G4RKPropagation(const G4RKPropagation &) : |
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85 | G4VFieldPropagation() |
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86 | { } |
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87 | |
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88 | |
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89 | G4RKPropagation::~G4RKPropagation() |
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90 | { |
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91 | // free theFieldMap memory |
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92 | if(theFieldMap) delete_FieldsAndMap(theFieldMap); |
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93 | |
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94 | // free theEquationMap memory |
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95 | if(theEquationMap) delete_EquationsAndMap(theEquationMap); |
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96 | |
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97 | if (theField) delete theField; |
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98 | } |
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99 | |
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100 | |
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101 | |
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102 | const G4RKPropagation & G4RKPropagation::operator=(const G4RKPropagation &) |
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103 | { |
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104 | throw G4HadronicException(__FILE__, __LINE__, "G4RKPropagation::operator= meant not to be accessible"); |
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105 | return *this; |
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106 | } |
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107 | |
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108 | G4int G4RKPropagation::operator==(const G4RKPropagation &) const |
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109 | { |
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110 | throw G4HadronicException(__FILE__, __LINE__, "G4RKPropagation::operator== meant not to be accessible"); |
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111 | return 0; |
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112 | } |
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113 | |
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114 | G4int G4RKPropagation::operator!=(const G4RKPropagation &) const |
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115 | { |
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116 | throw G4HadronicException(__FILE__, __LINE__, "G4RKPropagation::operator!= meant not to be accessible"); |
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117 | return 1; |
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118 | } |
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119 | |
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120 | //---------------------------------------------------------------------------- |
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121 | |
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122 | |
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123 | //---------------------------------------------------------------------------- |
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124 | void G4RKPropagation::Init(G4V3DNucleus * nucleus) |
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125 | //---------------------------------------------------------------------------- |
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126 | { |
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127 | |
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128 | // free theFieldMap memory |
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129 | if(theFieldMap) delete_FieldsAndMap(theFieldMap); |
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130 | |
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131 | // free theEquationMap memory |
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132 | if(theEquationMap) delete_EquationsAndMap(theEquationMap); |
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133 | |
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134 | if (theField) delete theField; |
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135 | |
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136 | // Initialize the nuclear field map. |
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137 | theNucleus = nucleus; |
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138 | theOuterRadius = theNucleus->GetOuterRadius(); |
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139 | |
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140 | theFieldMap = new std::map <G4int, G4VNuclearField*, std::less<G4int> >; |
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141 | |
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142 | (*theFieldMap)[G4Proton::Proton()->GetPDGEncoding()] = new G4ProtonField(theNucleus); |
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143 | (*theFieldMap)[G4Neutron::Neutron()->GetPDGEncoding()] = new G4NeutronField(theNucleus); |
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144 | (*theFieldMap)[G4AntiProton::AntiProton()->GetPDGEncoding()] = new G4AntiProtonField(theNucleus); |
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145 | (*theFieldMap)[G4KaonPlus::KaonPlus()->GetPDGEncoding()] = new G4KaonPlusField(theNucleus); |
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146 | (*theFieldMap)[G4KaonMinus::KaonMinus()->GetPDGEncoding()] = new G4KaonMinusField(theNucleus); |
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147 | (*theFieldMap)[G4KaonZero::KaonZero()->GetPDGEncoding()] = new G4KaonZeroField(theNucleus); |
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148 | (*theFieldMap)[G4PionPlus::PionPlus()->GetPDGEncoding()] = new G4PionPlusField(theNucleus); |
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149 | (*theFieldMap)[G4PionMinus::PionMinus()->GetPDGEncoding()] = new G4PionMinusField(theNucleus); |
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150 | (*theFieldMap)[G4PionZero::PionZero()->GetPDGEncoding()] = new G4PionZeroField(theNucleus); |
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151 | (*theFieldMap)[G4SigmaPlus::SigmaPlus()->GetPDGEncoding()] = new G4SigmaPlusField(theNucleus); |
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152 | (*theFieldMap)[G4SigmaMinus::SigmaMinus()->GetPDGEncoding()] = new G4SigmaMinusField(theNucleus); |
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153 | (*theFieldMap)[G4SigmaZero::SigmaZero()->GetPDGEncoding()] = new G4SigmaZeroField(theNucleus); |
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154 | |
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155 | theEquationMap = new std::map <G4int, G4Mag_EqRhs*, std::less<G4int> >; |
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156 | |
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157 | // theField needed by the design of G4Mag_eqRhs |
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158 | theField = new G4KM_DummyField; //Field not needed for integration |
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159 | G4KM_OpticalEqRhs * opticalEq; |
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160 | G4KM_NucleonEqRhs * nucleonEq; |
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161 | G4double mass; |
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162 | G4double opticalCoeff; |
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163 | |
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164 | nucleonEq = new G4KM_NucleonEqRhs(theField, theNucleus); |
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165 | mass = G4Proton::Proton()->GetPDGMass(); |
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166 | nucleonEq->SetMass(mass); |
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167 | (*theEquationMap)[G4Proton::Proton()->GetPDGEncoding()] = nucleonEq; |
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168 | |
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169 | nucleonEq = new G4KM_NucleonEqRhs(theField, theNucleus); |
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170 | mass = G4Neutron::Neutron()->GetPDGMass(); |
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171 | nucleonEq->SetMass(mass); |
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172 | (*theEquationMap)[G4Neutron::Neutron()->GetPDGEncoding()] = nucleonEq; |
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173 | |
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174 | opticalEq = new G4KM_OpticalEqRhs(theField, theNucleus); |
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175 | mass = G4AntiProton::AntiProton()->GetPDGMass(); |
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176 | opticalCoeff = |
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177 | (*theFieldMap)[G4AntiProton::AntiProton()->GetPDGEncoding()]->GetCoeff(); |
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178 | opticalEq->SetFactor(mass,opticalCoeff); |
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179 | (*theEquationMap)[G4AntiProton::AntiProton()->GetPDGEncoding()] = opticalEq; |
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180 | |
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181 | opticalEq = new G4KM_OpticalEqRhs(theField, theNucleus); |
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182 | mass = G4KaonPlus::KaonPlus()->GetPDGMass(); |
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183 | opticalCoeff = |
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184 | (*theFieldMap)[G4KaonPlus::KaonPlus()->GetPDGEncoding()]->GetCoeff(); |
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185 | opticalEq->SetFactor(mass,opticalCoeff); |
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186 | (*theEquationMap)[G4KaonPlus::KaonPlus()->GetPDGEncoding()] = opticalEq; |
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187 | |
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188 | opticalEq = new G4KM_OpticalEqRhs(theField, theNucleus); |
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189 | mass = G4KaonMinus::KaonMinus()->GetPDGMass(); |
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190 | opticalCoeff = |
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191 | (*theFieldMap)[G4KaonMinus::KaonMinus()->GetPDGEncoding()]->GetCoeff(); |
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192 | opticalEq->SetFactor(mass,opticalCoeff); |
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193 | (*theEquationMap)[G4KaonMinus::KaonMinus()->GetPDGEncoding()] = opticalEq; |
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194 | |
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195 | opticalEq = new G4KM_OpticalEqRhs(theField, theNucleus); |
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196 | mass = G4KaonZero::KaonZero()->GetPDGMass(); |
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197 | opticalCoeff = |
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198 | (*theFieldMap)[G4KaonZero::KaonZero()->GetPDGEncoding()]->GetCoeff(); |
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199 | opticalEq->SetFactor(mass,opticalCoeff); |
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200 | (*theEquationMap)[G4KaonZero::KaonZero()->GetPDGEncoding()] = opticalEq; |
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201 | |
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202 | opticalEq = new G4KM_OpticalEqRhs(theField, theNucleus); |
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203 | mass = G4PionPlus::PionPlus()->GetPDGMass(); |
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204 | opticalCoeff = |
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205 | (*theFieldMap)[G4PionPlus::PionPlus()->GetPDGEncoding()]->GetCoeff(); |
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206 | opticalEq->SetFactor(mass,opticalCoeff); |
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207 | (*theEquationMap)[G4PionPlus::PionPlus()->GetPDGEncoding()] = opticalEq; |
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208 | |
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209 | opticalEq = new G4KM_OpticalEqRhs(theField, theNucleus); |
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210 | mass = G4PionMinus::PionMinus()->GetPDGMass(); |
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211 | opticalCoeff = |
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212 | (*theFieldMap)[G4PionMinus::PionMinus()->GetPDGEncoding()]->GetCoeff(); |
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213 | opticalEq->SetFactor(mass,opticalCoeff); |
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214 | (*theEquationMap)[G4PionMinus::PionMinus()->GetPDGEncoding()] = opticalEq; |
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215 | |
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216 | opticalEq = new G4KM_OpticalEqRhs(theField, theNucleus); |
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217 | mass = G4PionZero::PionZero()->GetPDGMass(); |
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218 | opticalCoeff = |
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219 | (*theFieldMap)[G4PionZero::PionZero()->GetPDGEncoding()]->GetCoeff(); |
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220 | opticalEq->SetFactor(mass,opticalCoeff); |
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221 | (*theEquationMap)[G4PionZero::PionZero()->GetPDGEncoding()] = opticalEq; |
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222 | |
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223 | opticalEq = new G4KM_OpticalEqRhs(theField, theNucleus); |
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224 | mass = G4SigmaPlus::SigmaPlus()->GetPDGMass(); |
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225 | opticalCoeff = |
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226 | (*theFieldMap)[G4SigmaPlus::SigmaPlus()->GetPDGEncoding()]->GetCoeff(); |
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227 | opticalEq->SetFactor(mass,opticalCoeff); |
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228 | (*theEquationMap)[G4SigmaPlus::SigmaPlus()->GetPDGEncoding()] = opticalEq; |
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229 | |
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230 | opticalEq = new G4KM_OpticalEqRhs(theField, theNucleus); |
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231 | mass = G4SigmaMinus::SigmaMinus()->GetPDGMass(); |
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232 | opticalCoeff = |
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233 | (*theFieldMap)[G4SigmaMinus::SigmaMinus()->GetPDGEncoding()]->GetCoeff(); |
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234 | opticalEq->SetFactor(mass,opticalCoeff); |
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235 | (*theEquationMap)[G4SigmaMinus::SigmaMinus()->GetPDGEncoding()] = opticalEq; |
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236 | |
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237 | opticalEq = new G4KM_OpticalEqRhs(theField, theNucleus); |
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238 | mass = G4SigmaZero::SigmaZero()->GetPDGMass(); |
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239 | opticalCoeff = |
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240 | (*theFieldMap)[G4SigmaZero::SigmaZero()->GetPDGEncoding()]->GetCoeff(); |
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241 | opticalEq->SetFactor(mass,opticalCoeff); |
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242 | (*theEquationMap)[G4SigmaZero::SigmaZero()->GetPDGEncoding()] = opticalEq; |
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243 | } |
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244 | |
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245 | |
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246 | //#define debug_1_RKPropagation 1 |
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247 | //---------------------------------------------------------------------------- |
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248 | void G4RKPropagation::Transport(G4KineticTrackVector & active, |
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249 | //---------------------------------------------------------------------------- |
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250 | const G4KineticTrackVector &, |
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251 | G4double timeStep) |
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252 | { |
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253 | // reset momentum transfer to field |
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254 | theMomentumTranfer=G4ThreeVector(0,0,0); |
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255 | |
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256 | // Loop over tracks |
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257 | |
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258 | std::vector<G4KineticTrack *>::iterator i; |
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259 | for(i = active.begin(); i != active.end(); ++i) |
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260 | { |
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261 | G4double currTimeStep = timeStep; |
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262 | G4KineticTrack * kt = *i; |
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263 | G4int encoding = kt->GetDefinition()->GetPDGEncoding(); |
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264 | |
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265 | std::map <G4int, G4VNuclearField*, std::less<G4int> >::iterator fieldIter= theFieldMap->find(encoding); |
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266 | |
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267 | G4VNuclearField* currentField=0; |
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268 | if ( fieldIter != theFieldMap->end() ) currentField=fieldIter->second; |
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269 | |
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270 | // debug |
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271 | // if ( timeStep > 1e30 ) { |
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272 | // G4cout << " Name :" << kt->GetDefinition()->GetParticleName() << G4endl; |
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273 | // } |
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274 | |
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275 | // Get the time of intersections with the nucleus surface. |
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276 | G4double t_enter, t_leave; |
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277 | // if the particle does not intersecate with the nucleus go to next particle |
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278 | if(!GetSphereIntersectionTimes(kt, t_enter, t_leave)) |
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279 | { |
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280 | kt->SetState(G4KineticTrack::miss_nucleus); |
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281 | continue; |
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282 | } |
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283 | |
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284 | |
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285 | #ifdef debug_1_RKPropagation |
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286 | G4cout <<" kt,timeStep, Intersection times tenter, tleave " |
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287 | <<kt<<" "<< currTimeStep << " / " << t_enter << " / " << t_leave <<G4endl; |
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288 | #endif |
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289 | |
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290 | // if the particle is already outside nucleus go to next @@GF should never happen? check! |
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291 | // does happen for particles added as late.... |
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292 | // if(t_leave < 0 ) |
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293 | // { |
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294 | // throw G4HadronicException(__FILE__, __LINE__, "G4RKPropagation:: Attempt to track particle past a nucleus"); |
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295 | // continue; |
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296 | // } |
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297 | |
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298 | // Apply a straight line propagation for particle types |
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299 | // not included in the model |
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300 | if( ! currentField ) |
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301 | { |
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302 | if(currTimeStep == DBL_MAX)currTimeStep = t_leave*1.05; |
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303 | FreeTransport(kt, currTimeStep); |
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304 | if ( currTimeStep >= t_leave ) |
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305 | { |
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306 | if ( kt->GetState() == G4KineticTrack::inside ) |
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307 | { kt->SetState(G4KineticTrack::gone_out); } |
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308 | else |
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309 | { kt->SetState(G4KineticTrack::miss_nucleus);} |
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310 | } |
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311 | continue; |
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312 | } |
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313 | |
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314 | if(t_enter > 0) // the particle is out. Transport free to the surface |
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315 | { |
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316 | if(t_enter > currTimeStep) // the particle won't enter the nucleus |
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317 | { |
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318 | FreeTransport(kt, currTimeStep); |
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319 | continue; |
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320 | } |
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321 | else |
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322 | { |
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323 | FreeTransport(kt, t_enter); // go to surface |
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324 | currTimeStep -= t_enter; |
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325 | t_leave -= t_enter; // time left to leave nucleus |
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326 | // on the surface the particle loose the barrier energy |
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327 | // G4double newE = mom.e()-(*theFieldMap)[encoding]->GetBarrier(); |
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328 | // GetField = Barrier + FermiPotential |
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329 | G4double newE = kt->GetTrackingMomentum().e()-currentField->GetField(kt->GetPosition()); |
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330 | |
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331 | if(newE <= kt->GetActualMass()) // the particle cannot enter the nucleus |
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332 | { |
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333 | // FixMe: should be "pushed back?" |
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334 | // for the moment take it past the nucleus, so we'll not worry next time.. |
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335 | FreeTransport(kt, 1.1*t_leave); // take past nucleus |
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336 | kt->SetState(G4KineticTrack::miss_nucleus); |
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337 | // G4cout << "G4RKPropagation: Warning particle cannot enter Nucleus :" << G4endl; |
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338 | // G4cout << " enter nucleus, E out/in: " << kt->GetTrackingMomentum().e() << " / " << newE <<G4endl; |
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339 | // G4cout << " the Field "<< currentField->GetField(kt->GetPosition()) << " "<< kt->GetPosition()<<G4endl; |
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340 | // G4cout << " the particle "<<kt->GetDefinition()->GetParticleName()<<G4endl; |
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341 | continue; |
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342 | } |
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343 | // |
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344 | G4double newP = std::sqrt(newE*newE- sqr(kt->GetActualMass())); |
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345 | G4LorentzVector new4Mom(newP*kt->GetTrackingMomentum().vect().unit(), newE); |
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346 | G4ThreeVector transfer(kt->GetTrackingMomentum().vect()-new4Mom.vect()); |
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347 | G4ThreeVector boost= transfer / std::sqrt(transfer.mag2() + sqr(theNucleus->GetMass())); |
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348 | new4Mom*=G4LorentzRotation(boost); |
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349 | kt->SetTrackingMomentum(new4Mom); |
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350 | kt->SetState(G4KineticTrack::inside); |
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351 | |
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352 | /* |
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353 | G4cout <<" Enter Nucleus - E/Field/Sum: " <<kt->GetTrackingMomentum().e() << " / " |
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354 | << (*theFieldMap)[encoding]->GetField(kt->GetPosition()) << " / " |
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355 | << kt->GetTrackingMomentum().e()-currentField->GetField(kt->GetPosition()) |
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356 | << G4endl |
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357 | << " Barrier / field just inside nucleus (0.9999*kt->GetPosition())" |
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358 | << (*theFieldMap)[encoding]->GetBarrier() << " / " |
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359 | << (*theFieldMap)[encoding]->GetField(0.9999*kt->GetPosition()) |
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360 | << G4endl; |
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361 | */ |
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362 | } |
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363 | } |
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364 | |
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365 | // FixMe: should I add a control on theCutOnP here? |
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366 | // Transport the particle into the nucleus |
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367 | // G4cerr << "RKPropagation t_leave, curTimeStep " <<t_leave << " " <<currTimeStep<<G4endl; |
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368 | G4bool is_exiting=false; |
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369 | if(currTimeStep > t_leave) // particle will exit from the nucleus |
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370 | { |
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371 | currTimeStep = t_leave; |
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372 | is_exiting=true; |
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373 | } |
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374 | |
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375 | #ifdef debug_1_RKPropagation |
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376 | G4cerr << "RKPropagation is_exiting?, t_leave, curTimeStep " <<is_exiting<<" "<<t_leave << " " <<currTimeStep<<G4endl; |
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377 | G4cout << "RKPropagation Ekin, field, projectile potential, p " |
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378 | << kt->GetTrackingMomentum().e() - kt->GetTrackingMomentum().mag() << " " |
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379 | << kt->GetPosition()<<" " |
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380 | << G4endl << currentField->GetField(kt->GetPosition()) << " " |
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381 | << kt->GetProjectilePotential()<< G4endl |
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382 | << kt->GetTrackingMomentum() |
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383 | << G4endl; |
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384 | #endif |
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385 | |
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386 | G4LorentzVector momold=kt->GetTrackingMomentum(); |
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387 | G4ThreeVector posold=kt->GetPosition(); |
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388 | |
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389 | // if (currentField->GetField(kt->GetPosition()) > kt->GetProjectilePotential() || |
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390 | if (currTimeStep > 0 && |
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391 | ! FieldTransport(kt, currTimeStep)) { |
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392 | FreeTransport(kt,currTimeStep); |
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393 | } |
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394 | |
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395 | #ifdef debug_1_RKPropagation |
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396 | G4cout << "RKPropagation Ekin, field, p " |
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397 | << kt->GetTrackingMomentum().e() - kt->GetTrackingMomentum().mag() << " " |
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398 | << G4endl << currentField->GetField(kt->GetPosition())<< G4endl |
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399 | << kt->GetTrackingMomentum() |
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400 | << G4endl |
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401 | << "delta p " << momold-kt->GetTrackingMomentum() << G4endl |
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402 | << "del pos " << posold-kt->GetPosition() |
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403 | << G4endl; |
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404 | #endif |
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405 | |
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406 | // complete the transport |
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407 | // FixMe: in some cases there could be a significant |
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408 | // part to do still in the nucleus, or we stepped to far... depending on |
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409 | // slope of potential |
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410 | G4double t_in=-1, t_out=0; // set onto boundary. |
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411 | |
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412 | // should go out, or are already out by a too long step.. |
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413 | if(is_exiting || |
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414 | (GetSphereIntersectionTimes(kt, t_in, t_out) &&t_in<0 && t_out<=0 )) // particle is exiting |
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415 | { |
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416 | if(t_in < 0 && t_out >= 0) //still inside, transport safely out. |
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417 | { |
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418 | // transport free to a position that is surely out of the nucleus, to avoid |
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419 | // a new transportation and a new adding the barrier next loop. |
---|
420 | G4ThreeVector savePos = kt->GetPosition(); |
---|
421 | FreeTransport(kt, t_out); |
---|
422 | // and evaluate the right the energy |
---|
423 | G4double newE=kt->GetTrackingMomentum().e(); |
---|
424 | |
---|
425 | // G4cout << " V pos/savePos << " |
---|
426 | // << (*theFieldMap)[encoding]->GetField(kt->GetPosition())<< " / " |
---|
427 | // << (*theFieldMap)[encoding]->GetField(savePos) |
---|
428 | // << G4endl; |
---|
429 | |
---|
430 | if ( std::abs(currentField->GetField(savePos)) > 0. && |
---|
431 | std::abs(currentField->GetField(kt->GetPosition())) > 0.) |
---|
432 | { // FixMe GF: savePos/pos may be out of nucleus, where GetField(..)=0 |
---|
433 | // This wrongly adds or subtracts the Barrier here while |
---|
434 | // this is done later. |
---|
435 | newE += currentField->GetField(savePos) |
---|
436 | - currentField->GetField(kt->GetPosition()); |
---|
437 | } |
---|
438 | |
---|
439 | // G4cout << " go border nucleus, E in/border: " << kt->GetTrackingMomentum() << " / " << newE <<G4endl; |
---|
440 | |
---|
441 | if(newE < kt->GetActualMass()) |
---|
442 | { |
---|
443 | #ifdef debug_1_RKPropagation |
---|
444 | G4cout << "RKPropagation-Transport: problem with particle exiting - ignored" << G4endl; |
---|
445 | G4cout << " cannot leave nucleus, E in/out: " << kt->GetTrackingMomentum() << " / " << newE <<G4endl; |
---|
446 | #endif |
---|
447 | if (kt->GetDefinition() == G4Proton::Proton() || |
---|
448 | kt->GetDefinition() == G4Neutron::Neutron() ) { |
---|
449 | kt->SetState(G4KineticTrack::captured); |
---|
450 | } else { |
---|
451 | kt->SetState(G4KineticTrack::gone_out); //@@GF tofix |
---|
452 | } |
---|
453 | continue; // the particle cannot exit the nucleus |
---|
454 | } |
---|
455 | G4double newP = std::sqrt(newE*newE- sqr(kt->GetActualMass())); |
---|
456 | G4LorentzVector new4Mom(newP*kt->GetTrackingMomentum().vect().unit(), newE); |
---|
457 | G4ThreeVector transfer(kt->GetTrackingMomentum().vect()-new4Mom.vect()); |
---|
458 | G4ThreeVector boost= transfer / std::sqrt(transfer.mag2() + sqr(theNucleus->GetMass())); |
---|
459 | new4Mom*=G4LorentzRotation(boost); |
---|
460 | kt->SetTrackingMomentum(new4Mom); |
---|
461 | } |
---|
462 | // add the potential barrier |
---|
463 | // FixMe the Coulomb field is not parallel to mom, this is simple approximation |
---|
464 | G4double newE = kt->GetTrackingMomentum().e()+currentField->GetField(kt->GetPosition()); |
---|
465 | if(newE < kt->GetActualMass()) |
---|
466 | { // the particle cannot exit the nucleus @@@ GF check. |
---|
467 | #ifdef debug_1_RKPropagation |
---|
468 | G4cout << " cannot leave nucleus, E in/out: " << kt->GetTrackingMomentum() << " / " << newE <<G4endl; |
---|
469 | #endif |
---|
470 | if (kt->GetDefinition() == G4Proton::Proton() || |
---|
471 | kt->GetDefinition() == G4Neutron::Neutron() ) { |
---|
472 | kt->SetState(G4KineticTrack::captured); |
---|
473 | } else { |
---|
474 | kt->SetState(G4KineticTrack::gone_out); //@@GF tofix |
---|
475 | } |
---|
476 | continue; |
---|
477 | } |
---|
478 | G4double newP = std::sqrt(newE*newE- sqr(kt->GetActualMass())); |
---|
479 | G4LorentzVector new4Mom(newP*kt->GetTrackingMomentum().vect().unit(), newE); |
---|
480 | G4ThreeVector transfer(kt->GetTrackingMomentum().vect()-new4Mom.vect()); |
---|
481 | G4ThreeVector boost= transfer / std::sqrt(transfer.mag2() + sqr(theNucleus->GetMass())); |
---|
482 | new4Mom*=G4LorentzRotation(boost); |
---|
483 | kt->SetTrackingMomentum(new4Mom); |
---|
484 | kt->SetState(G4KineticTrack::gone_out); |
---|
485 | } |
---|
486 | |
---|
487 | } |
---|
488 | |
---|
489 | } |
---|
490 | |
---|
491 | |
---|
492 | //---------------------------------------------------------------------------- |
---|
493 | G4ThreeVector G4RKPropagation::GetMomentumTransfer() const |
---|
494 | //---------------------------------------------------------------------------- |
---|
495 | { |
---|
496 | return theMomentumTranfer; |
---|
497 | } |
---|
498 | |
---|
499 | |
---|
500 | //---------------------------------------------------------------------------- |
---|
501 | G4bool G4RKPropagation::FieldTransport(G4KineticTrack * kt, const G4double timeStep) |
---|
502 | //---------------------------------------------------------------------------- |
---|
503 | { |
---|
504 | theMomentumTranfer=G4ThreeVector(0,0,0); |
---|
505 | // G4cout <<"Stepper input"<<kt->GetTrackingMomentum()<<G4endl; |
---|
506 | // create the integrator stepper |
---|
507 | // G4Mag_EqRhs * equation = mapIter->second; |
---|
508 | G4Mag_EqRhs * equation = (*theEquationMap)[kt->GetDefinition()->GetPDGEncoding()]; |
---|
509 | G4MagIntegratorStepper * stepper = new G4ClassicalRK4(equation); |
---|
510 | |
---|
511 | // create the integrator driver |
---|
512 | G4double hMin = 1.0e-25*second; // arbitrary choice. Means 0.03 fm at c |
---|
513 | G4MagInt_Driver * driver = new G4MagInt_Driver(hMin, stepper); |
---|
514 | |
---|
515 | // Temporary: use driver->AccurateAdvance() |
---|
516 | // create the G4FieldTrack needed by AccurateAdvance |
---|
517 | G4double curveLength = 0; |
---|
518 | G4FieldTrack track(kt->GetPosition(), |
---|
519 | kt->GetTrackingMomentum().vect().unit(), // momentum direction |
---|
520 | curveLength, // curvelength |
---|
521 | kt->GetTrackingMomentum().e()-kt->GetActualMass(), // kinetic energy |
---|
522 | kt->GetActualMass(), // restmass |
---|
523 | kt->GetTrackingMomentum().beta()*c_light); // velocity |
---|
524 | // integrate |
---|
525 | G4double eps = 0.01; |
---|
526 | // G4cout << "currTimeStep = " << currTimeStep << G4endl; |
---|
527 | if(!driver->AccurateAdvance(track, timeStep, eps)) |
---|
528 | { // cannot track this particle |
---|
529 | #ifdef debug_1_RKPropagation |
---|
530 | std::cerr << "G4RKPropagation::FieldTransport() warning: integration error." |
---|
531 | << G4endl << "position " << kt->GetPosition() << " 4mom " <<kt->GetTrackingMomentum() |
---|
532 | <<G4endl << " timestep " <<timeStep |
---|
533 | << G4endl; |
---|
534 | #endif |
---|
535 | delete driver; |
---|
536 | delete stepper; |
---|
537 | return false; |
---|
538 | } |
---|
539 | /* |
---|
540 | G4cout <<" E/Field/Sum be4 : " <<mom.e() << " / " |
---|
541 | << (*theFieldMap)[encoding]->GetField(pos) << " / " |
---|
542 | << mom.e()+(*theFieldMap)[encoding]->GetField(pos) |
---|
543 | << G4endl; |
---|
544 | */ |
---|
545 | |
---|
546 | // Correct for momentum ( thus energy) transfered to nucleus, boost particle into moving nuclues frame. |
---|
547 | G4ThreeVector MomentumTranfer = kt->GetTrackingMomentum().vect() - track.GetMomentum(); |
---|
548 | G4ThreeVector boost= MomentumTranfer / std::sqrt (MomentumTranfer.mag2() +sqr(theNucleus->GetMass())); |
---|
549 | |
---|
550 | // update the kt |
---|
551 | kt->SetPosition(track.GetPosition()); |
---|
552 | G4LorentzVector mom(track.GetMomentum(),std::sqrt(track.GetMomentum().mag2() + sqr(kt->GetActualMass()))); |
---|
553 | mom *= G4LorentzRotation( boost ); |
---|
554 | theMomentumTranfer += ( kt->GetTrackingMomentum() - mom ).vect(); |
---|
555 | kt->SetTrackingMomentum(mom); |
---|
556 | |
---|
557 | // G4cout <<"Stepper output"<<kt<<" "<<kt->GetTrackingMomentum()<<" "<<kt->GetPosition()<<G4endl; |
---|
558 | /* |
---|
559 | * G4ThreeVector MomentumTranfer2=kt->GetTrackingMomentum().vect() - mom.vect(); |
---|
560 | * G4cout << " MomentumTransfer/corrected" << MomentumTranfer << " " << MomentumTranfer.mag() |
---|
561 | * << " " << MomentumTranfer2 << " " << MomentumTranfer2.mag() << " " |
---|
562 | * << MomentumTranfer-MomentumTranfer2 << " "<< |
---|
563 | * MomentumTranfer-MomentumTranfer2.mag() << " " << G4endl; |
---|
564 | * G4cout <<" E/Field/Sum aft : " <<mom.e() << " / " |
---|
565 | * << " / " << (*theFieldMap)[encoding]->GetField(pos)<< " / " |
---|
566 | * << mom.e()+(*theFieldMap)[encoding]->GetField(pos) |
---|
567 | * << G4endl; |
---|
568 | */ |
---|
569 | |
---|
570 | delete driver; |
---|
571 | delete stepper; |
---|
572 | return true; |
---|
573 | } |
---|
574 | |
---|
575 | //---------------------------------------------------------------------------- |
---|
576 | G4bool G4RKPropagation::FreeTransport(G4KineticTrack * kt, const G4double timeStep) |
---|
577 | //---------------------------------------------------------------------------- |
---|
578 | { |
---|
579 | G4ThreeVector newpos = kt->GetPosition() + |
---|
580 | timeStep*c_light/kt->GetTrackingMomentum().e() * kt->GetTrackingMomentum().vect(); |
---|
581 | kt->SetPosition(newpos); |
---|
582 | return true; |
---|
583 | } |
---|
584 | |
---|
585 | /* |
---|
586 | G4bool G4RKPropagation::WillBeCaptured(const G4KineticTrack * kt) |
---|
587 | { |
---|
588 | G4double radius = theOuterRadius; |
---|
589 | |
---|
590 | // evaluate the final energy. Il will be captured if newE or newP < 0 |
---|
591 | G4ParticleDefinition * definition = kt->GetDefinition(); |
---|
592 | G4double mass = definition->GetPDGMass(); |
---|
593 | G4ThreeVector pos = kt->GetPosition(); |
---|
594 | G4LorentzVector mom = kt->GetTrackingMomentum(); |
---|
595 | G4VNuclearField * field = (*theFieldMap)[definition->GetPDGEncoding()]; |
---|
596 | G4ThreeVector newPos(0, 0, radius); // to get the field on the surface |
---|
597 | |
---|
598 | G4double newE = mom.e()+field->GetField(pos)-field->GetField(newPos); |
---|
599 | |
---|
600 | return ((newE < mass) ? false : true); |
---|
601 | } |
---|
602 | */ |
---|
603 | |
---|
604 | |
---|
605 | |
---|
606 | //---------------------------------------------------------------------------- |
---|
607 | G4bool G4RKPropagation::GetSphereIntersectionTimes(const G4double radius, |
---|
608 | //---------------------------------------------------------------------------- |
---|
609 | const G4ThreeVector & currentPos, |
---|
610 | const G4LorentzVector & momentum, |
---|
611 | G4double & t1, G4double & t2) |
---|
612 | { |
---|
613 | G4ThreeVector speed = momentum.vect()/momentum.e(); // boost vector |
---|
614 | G4double scalarProd = currentPos.dot(speed); |
---|
615 | G4double speedMag = speed.mag(); |
---|
616 | G4double sqrtArg = scalarProd*scalarProd - |
---|
617 | speedMag*speedMag*(currentPos.mag2()-radius*radius); |
---|
618 | if(sqrtArg <= 0.) // particle will not intersect the sphere |
---|
619 | { |
---|
620 | // G4cout << " GetSphereIntersectionTimes sqrtArg negative: " << sqrtArg << G4endl; |
---|
621 | return false; |
---|
622 | } |
---|
623 | t1 = (-scalarProd - std::sqrt(sqrtArg))/speedMag/speedMag/c_light; |
---|
624 | t2 = (-scalarProd + std::sqrt(sqrtArg))/speedMag/speedMag/c_light; |
---|
625 | return true; |
---|
626 | } |
---|
627 | |
---|
628 | //---------------------------------------------------------------------------- |
---|
629 | G4bool G4RKPropagation::GetSphereIntersectionTimes(const G4KineticTrack * kt, |
---|
630 | G4double & t1, G4double & t2) |
---|
631 | { |
---|
632 | G4double radius = theOuterRadius + 3*fermi; // "safety" of 3 fermi |
---|
633 | G4ThreeVector speed = kt->GetTrackingMomentum().vect()/kt->GetTrackingMomentum().e(); // bost vector |
---|
634 | G4double scalarProd = kt->GetPosition().dot(speed); |
---|
635 | G4double speedMag2 = speed.mag2(); |
---|
636 | G4double sqrtArg = scalarProd*scalarProd - |
---|
637 | speedMag2*(kt->GetPosition().mag2()-radius*radius); |
---|
638 | if(sqrtArg <= 0.) // particle will not intersect the sphere |
---|
639 | { |
---|
640 | return false; |
---|
641 | } |
---|
642 | t1 = (-scalarProd - std::sqrt(sqrtArg))/speedMag2/c_light; |
---|
643 | t2 = (-scalarProd + std::sqrt(sqrtArg))/speedMag2/c_light; |
---|
644 | return true; |
---|
645 | } |
---|
646 | |
---|
647 | // Implementation methods |
---|
648 | |
---|
649 | //---------------------------------------------------------------------------- |
---|
650 | void G4RKPropagation::delete_FieldsAndMap( |
---|
651 | //---------------------------------------------------------------------------- |
---|
652 | std::map <G4int, G4VNuclearField *, std::less<G4int> > * aMap) |
---|
653 | { |
---|
654 | if(aMap) |
---|
655 | { |
---|
656 | std::map <G4int, G4VNuclearField *, std::less<G4int> >::iterator cur; |
---|
657 | for(cur = aMap->begin(); cur != aMap->end(); ++cur) |
---|
658 | delete (*cur).second; |
---|
659 | |
---|
660 | aMap->clear(); |
---|
661 | delete aMap; |
---|
662 | } |
---|
663 | |
---|
664 | } |
---|
665 | |
---|
666 | //---------------------------------------------------------------------------- |
---|
667 | void G4RKPropagation::delete_EquationsAndMap( |
---|
668 | //---------------------------------------------------------------------------- |
---|
669 | std::map <G4int, G4Mag_EqRhs *, std::less<G4int> > * aMap) |
---|
670 | { |
---|
671 | if(aMap) |
---|
672 | { |
---|
673 | std::map <G4int, G4Mag_EqRhs *, std::less<G4int> >::iterator cur; |
---|
674 | for(cur = aMap->begin(); cur != aMap->end(); ++cur) |
---|
675 | delete (*cur).second; |
---|
676 | |
---|
677 | aMap->clear(); |
---|
678 | delete aMap; |
---|
679 | } |
---|
680 | } |
---|