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: F02ElectricFieldSetup.cc,v 1.2.2.1 2008/05/05 09:23:52 gcosmo Exp $ |
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28 | // GEANT4 tag $Name: geant4-09-01-patch-02 $ |
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29 | // |
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30 | // |
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31 | // User Field class implementation. |
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32 | // |
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33 | |
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34 | #include "F02ElectricFieldSetup.hh" |
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35 | #include "F02FieldMessenger.hh" |
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36 | |
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37 | #include "G4UniformElectricField.hh" |
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38 | #include "G4UniformMagField.hh" |
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39 | #include "G4MagneticField.hh" |
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40 | #include "G4FieldManager.hh" |
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41 | #include "G4TransportationManager.hh" |
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42 | #include "G4EquationOfMotion.hh" |
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43 | #include "G4EqMagElectricField.hh" |
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44 | #include "G4Mag_UsualEqRhs.hh" |
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45 | #include "G4MagIntegratorStepper.hh" |
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46 | #include "G4MagIntegratorDriver.hh" |
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47 | #include "G4ChordFinder.hh" |
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48 | |
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49 | #include "G4ExplicitEuler.hh" |
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50 | #include "G4ImplicitEuler.hh" |
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51 | #include "G4SimpleRunge.hh" |
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52 | #include "G4SimpleHeum.hh" |
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53 | #include "G4ClassicalRK4.hh" |
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54 | #include "G4HelixExplicitEuler.hh" |
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55 | #include "G4HelixImplicitEuler.hh" |
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56 | #include "G4HelixSimpleRunge.hh" |
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57 | #include "G4CashKarpRKF45.hh" |
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58 | #include "G4RKG3_Stepper.hh" |
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59 | |
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60 | ////////////////////////////////////////////////////////////////////////// |
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61 | // |
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62 | // Constructors: |
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63 | |
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64 | F02ElectricFieldSetup::F02ElectricFieldSetup() |
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65 | : fChordFinder(0), fStepper(0), fIntgrDriver(0) |
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66 | { |
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67 | fEMfield = new G4UniformElectricField( |
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68 | G4ThreeVector(0.0,100000.0*kilovolt/cm,0.0)); |
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69 | fFieldMessenger = new F02FieldMessenger(this) ; |
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70 | fEquation = new G4EqMagElectricField(fEMfield); |
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71 | fMinStep = 0.010*mm ; // minimal step of 10 microns |
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72 | fStepperType = 4 ; // ClassicalRK4 -- the default stepper |
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73 | |
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74 | fFieldManager = GetGlobalFieldManager(); |
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75 | UpdateField(); |
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76 | |
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77 | } |
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78 | |
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79 | ///////////////////////////////////////////////////////////////////////////////// |
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80 | |
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81 | F02ElectricFieldSetup::F02ElectricFieldSetup(G4ThreeVector pFV) |
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82 | : fChordFinder(0), |
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83 | fStepper(0), |
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84 | fIntgrDriver(0) |
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85 | { |
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86 | fEMfield = new G4UniformElectricField(pFV); |
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87 | // GetGlobalFieldManager()->CreateChordFinder(this); |
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88 | |
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89 | fFieldMessenger = new F02FieldMessenger(this) ; |
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90 | fEquation = new G4EqMagElectricField(fEMfield); |
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91 | fMinStep = 0.010*mm ; // minimal step of 10 microns |
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92 | fStepperType = 4 ; // ClassicalRK4 -- the default stepper |
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93 | |
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94 | fFieldManager = GetGlobalFieldManager(); |
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95 | UpdateField(); |
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96 | } |
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97 | |
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98 | //////////////////////////////////////////////////////////////////////////////// |
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99 | |
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100 | F02ElectricFieldSetup::~F02ElectricFieldSetup() |
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101 | { |
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102 | if(fChordFinder) delete fChordFinder; |
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103 | if(fStepper) delete fStepper; |
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104 | if(fEquation) delete fEquation; |
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105 | if(fEMfield) delete fEMfield; |
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106 | } |
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107 | |
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108 | ///////////////////////////////////////////////////////////////////////////// |
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109 | // |
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110 | // Register this field to 'global' Field Manager and |
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111 | // Create Stepper and Chord Finder with predefined type, minstep (resp.) |
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112 | // |
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113 | |
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114 | void F02ElectricFieldSetup::UpdateField() |
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115 | { |
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116 | SetStepper(); |
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117 | |
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118 | G4cout<<"The minimal step is equal to "<<fMinStep/mm<<" mm"<<G4endl ; |
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119 | |
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120 | fFieldManager->SetDetectorField(fEMfield ); |
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121 | |
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122 | if(fChordFinder) delete fChordFinder; |
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123 | // fChordFinder = new G4ChordFinder( fEMfield, fMinStep, fStepper); |
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124 | |
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125 | fIntgrDriver = new G4MagInt_Driver(fMinStep, |
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126 | fStepper, |
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127 | fStepper->GetNumberOfVariables() ); |
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128 | |
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129 | fChordFinder = new G4ChordFinder(fIntgrDriver); |
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130 | |
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131 | fFieldManager->SetChordFinder( fChordFinder ); |
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132 | } |
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133 | |
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134 | ///////////////////////////////////////////////////////////////////////////// |
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135 | // |
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136 | // Set stepper according to the stepper type |
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137 | // |
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138 | |
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139 | void F02ElectricFieldSetup::SetStepper() |
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140 | { |
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141 | G4int nvar = 8; |
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142 | |
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143 | if(fStepper) delete fStepper; |
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144 | |
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145 | switch ( fStepperType ) |
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146 | { |
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147 | case 0: |
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148 | fStepper = new G4ExplicitEuler( fEquation, nvar ); |
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149 | G4cout<<"G4ExplicitEuler is calledS"<<G4endl; |
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150 | break; |
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151 | case 1: |
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152 | fStepper = new G4ImplicitEuler( fEquation, nvar ); |
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153 | G4cout<<"G4ImplicitEuler is called"<<G4endl; |
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154 | break; |
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155 | case 2: |
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156 | fStepper = new G4SimpleRunge( fEquation, nvar ); |
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157 | G4cout<<"G4SimpleRunge is called"<<G4endl; |
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158 | break; |
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159 | case 3: |
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160 | fStepper = new G4SimpleHeum( fEquation, nvar ); |
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161 | G4cout<<"G4SimpleHeum is called"<<G4endl; |
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162 | break; |
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163 | case 4: |
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164 | fStepper = new G4ClassicalRK4( fEquation, nvar ); |
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165 | G4cout<<"G4ClassicalRK4 (default) is called"<<G4endl; |
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166 | break; |
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167 | case 5: |
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168 | fStepper = new G4CashKarpRKF45( fEquation, nvar ); |
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169 | G4cout<<"G4CashKarpRKF45 is called"<<G4endl; |
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170 | break; |
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171 | case 6: |
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172 | fStepper = 0; // new G4RKG3_Stepper( fEquation, nvar ); |
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173 | G4cout<<"G4RKG3_Stepper is not currently working for Electric Field"<<G4endl; |
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174 | break; |
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175 | case 7: |
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176 | fStepper = 0; // new G4HelixExplicitEuler( fEquation ); |
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177 | G4cout<<"G4HelixExplicitEuler is not valid for Electric Field"<<G4endl; |
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178 | break; |
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179 | case 8: |
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180 | fStepper = 0; // new G4HelixImplicitEuler( fEquation ); |
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181 | G4cout<<"G4HelixImplicitEuler is not valid for Electric Field"<<G4endl; |
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182 | break; |
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183 | case 9: |
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184 | fStepper = 0; // new G4HelixSimpleRunge( fEquation ); |
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185 | G4cout<<"G4HelixSimpleRunge is not valid for Electric Field"<<G4endl; |
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186 | break; |
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187 | default: fStepper = 0; |
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188 | } |
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189 | } |
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190 | |
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191 | ///////////////////////////////////////////////////////////////////////////// |
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192 | // |
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193 | // Set the value of the Global Field to fieldValue along Z |
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194 | // |
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195 | |
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196 | void F02ElectricFieldSetup::SetFieldValue(G4double fieldValue) |
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197 | { |
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198 | G4ThreeVector fieldVector( 0.0, 0.0, fieldValue*volt/mm ); |
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199 | |
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200 | SetFieldValue( fieldVector ); |
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201 | } |
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202 | |
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203 | /////////////////////////////////////////////////////////////////////////////// |
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204 | // |
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205 | // Set the value of the Global Field value to fieldVector |
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206 | // |
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207 | |
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208 | void F02ElectricFieldSetup::SetFieldValue(G4ThreeVector fieldVector) |
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209 | { |
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210 | // Find the Field Manager for the global field |
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211 | G4FieldManager* fieldMgr= GetGlobalFieldManager(); |
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212 | |
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213 | if(fieldVector != G4ThreeVector(0.,0.,0.)) |
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214 | { |
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215 | if(fEMfield) delete fEMfield; |
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216 | fEMfield = new G4UniformElectricField(fieldVector); |
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217 | |
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218 | fEquation->SetFieldObj(fEMfield); // must now point to the new field |
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219 | |
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220 | // UpdateField(); |
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221 | |
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222 | fieldMgr->SetDetectorField(fEMfield); |
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223 | } |
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224 | else |
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225 | { |
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226 | // If the new field's value is Zero, then it is best to |
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227 | // insure that it is not used for propagation. |
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228 | if(fEMfield) delete fEMfield; |
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229 | fEMfield = 0; |
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230 | fEquation->SetFieldObj(fEMfield); // As a double check ... |
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231 | |
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232 | G4MagneticField* fEMfield = 0; |
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233 | fieldMgr->SetDetectorField(fEMfield); |
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234 | } |
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235 | } |
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236 | |
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237 | //////////////////////////////////////////////////////////////////////////////// |
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238 | // |
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239 | // Utility method |
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240 | |
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241 | G4FieldManager* F02ElectricFieldSetup::GetGlobalFieldManager() |
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242 | { |
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243 | return G4TransportationManager::GetTransportationManager() |
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244 | ->GetFieldManager(); |
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245 | } |
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