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2 | // ******************************************************************** |
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3 | // * License and Disclaimer * |
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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 | // |
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27 | // $Id: G4eLowEnergyLoss.hh,v 1.14 2006/06/29 19:37:42 gunter Exp $ |
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28 | // GEANT4 tag $Name: geant4-09-03 $ |
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29 | // |
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30 | // ------------------------------------------------------------------- |
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31 | |
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32 | // Class description: |
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33 | // Low Energy electromagnetic process, electron energy loss |
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34 | // Further documentation available from http://www.ge.infn.it/geant4/lowE |
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35 | |
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36 | // ------------------------------------------------------------------- |
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37 | // |
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38 | // This class is the implementation of the unified Energy Loss process. |
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39 | // It calculates the continuous energy loss for e+/e-. |
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40 | // The following processes give contributions to the continuous |
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41 | // energy loss (by default) : |
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42 | // --- ionisation (= cont.ion.loss + delta ray production) |
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43 | // --- bremsstrahlung (= cont.loss due to soft brems+discrete bremsstrahlung) |
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44 | // more can be added .......... |
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45 | // This class creates static dE/dx and range tables for e+ and e-, |
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46 | // which tables can be used by other processes , too. |
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47 | // G4eLowEnergyLoss is the base class for the processes giving contribution |
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48 | // to the (continuous) energy loss of e+/e- . |
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49 | // |
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50 | // History: first implementation, based on object model of |
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51 | // 2nd December 1995, G.Cosmo |
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52 | // ---------- G4eLowEnergyLoss physics process ----------- |
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53 | // by Laszlo Urban, 20 March 1997 |
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54 | // |
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55 | // 27.05.98 OldGetRange removed + other corrs , L.Urban |
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56 | // 10.09.98 cleanup |
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57 | // 16.10.98 public method SetStepFunction() + messenger class |
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58 | // 20.01.99 new data members , L.Urban |
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59 | // 10.02.00 modifications, new e.m. structure , L.Urban |
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60 | // 18.10.01 Revision to improve code quality and consistency with design |
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61 | // 23.11.01 V.Ivanchenko Move static member-functions from header to source |
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62 | // 28.03.02 V.Ivanchenko add fluorescence flag |
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63 | // 21.01.03 V.Ivanchenko cut per region |
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64 | // ------------------------------------------------------------ |
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65 | |
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66 | #ifndef G4eLowEnergyLoss_h |
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67 | #define G4eLowEnergyLoss_h 1 |
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68 | |
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69 | #include "G4ios.hh" |
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70 | #include "globals.hh" |
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71 | #include "Randomize.hh" |
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72 | #include "G4VeLowEnergyLoss.hh" |
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73 | #include "G4Material.hh" |
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74 | #include "G4Element.hh" |
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75 | #include "G4ParticleChangeForLoss.hh" |
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76 | #include "globals.hh" |
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77 | #include "G4Track.hh" |
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78 | #include "G4Step.hh" |
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79 | #include "G4Electron.hh" |
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80 | #include "G4Positron.hh" |
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81 | #include "G4PhysicsLogVector.hh" |
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82 | #include "G4PhysicsLinearVector.hh" |
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83 | #include "G4EnergyLossTables.hh" |
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84 | |
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85 | class G4EnergyLossMessenger; |
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86 | |
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87 | class G4eLowEnergyLoss : public G4VeLowEnergyLoss |
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88 | |
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89 | { |
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90 | public: |
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91 | |
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92 | G4eLowEnergyLoss(const G4String& ); |
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93 | |
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94 | ~G4eLowEnergyLoss(); |
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95 | |
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96 | G4bool IsApplicable(const G4ParticleDefinition&); |
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97 | // true for e+/e- , false otherwise |
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98 | |
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99 | void BuildDEDXTable(const G4ParticleDefinition& aParticleType); |
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100 | // It builds dE/dx and range tables for aParticleType and |
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101 | // for every material contained in the materialtable. |
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102 | |
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103 | G4double GetContinuousStepLimit(const G4Track& track, |
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104 | G4double previousStepSize, |
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105 | G4double currentMinimumStep, |
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106 | G4double& currentSafety); |
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107 | // Computes the steplimit due to the energy loss process. |
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108 | |
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109 | G4VParticleChange* AlongStepDoIt(const G4Track& track, |
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110 | const G4Step& Step) ; |
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111 | // Performs the computation of the (continuous) energy loss |
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112 | // after the step (with fluctuation). |
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113 | |
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114 | virtual G4double GetMeanFreePath(const G4Track& track, |
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115 | G4double previousStepSize, |
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116 | G4ForceCondition* condition) = 0; |
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117 | // Virtual function to be overridden in the derived classes |
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118 | // ( ionisation and bremsstrahlung) . |
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119 | |
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120 | virtual G4VParticleChange* PostStepDoIt(const G4Track& track, |
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121 | const G4Step& step) = 0; |
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122 | // Virtual function to be overridden in the derived classes |
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123 | // ( ionisation and bremsstrahlung) . |
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124 | |
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125 | static void SetNbOfProcesses(G4int nb); |
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126 | // Sets number of processes giving contribution to the energy loss |
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127 | |
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128 | static void PlusNbOfProcesses(); |
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129 | // Increases number of processes giving contribution to the energy loss |
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130 | |
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131 | static void MinusNbOfProcesses(); |
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132 | // Decreases number of processes giving contribution to the energy loss |
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133 | |
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134 | static G4int GetNbOfProcesses(); |
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135 | // Gets number of processes giving contribution to the energy loss |
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136 | // ( default value = 2) |
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137 | |
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138 | static void SetLowerBoundEloss(G4double val); |
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139 | static void SetUpperBoundEloss(G4double val); |
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140 | static void SetNbinEloss(G4int nb); |
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141 | |
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142 | static G4double GetLowerBoundEloss(); |
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143 | static G4double GetUpperBoundEloss(); |
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144 | static G4int GetNbinEloss(); |
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145 | |
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146 | void ActivateFluorescence(G4bool val); |
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147 | // Set fluorescence flag on/off |
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148 | |
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149 | G4bool Fluorescence() const; |
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150 | // Get flurescence flag |
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151 | |
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152 | protected: |
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153 | |
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154 | virtual std::vector<G4DynamicParticle*>* DeexciteAtom(const G4MaterialCutsCouple* , |
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155 | G4double, G4double) // incidentEnergy, eLoss |
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156 | { return 0; }; |
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157 | |
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158 | G4PhysicsTable* theLossTable; |
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159 | |
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160 | G4double MinKineticEnergy ; // particle with kinetic energy |
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161 | // smaller than MinKineticEnergy |
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162 | // is stopped in AlongStepDoIt |
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163 | |
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164 | G4double Charge,lastCharge ; |
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165 | |
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166 | //basic DEDX and Range tables |
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167 | static G4PhysicsTable* theDEDXElectronTable ; |
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168 | static G4PhysicsTable* theDEDXPositronTable ; |
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169 | static G4PhysicsTable* theRangeElectronTable ; |
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170 | static G4PhysicsTable* theRangePositronTable ; |
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171 | |
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172 | //inverse tables of the range tables |
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173 | static G4PhysicsTable* theInverseRangeElectronTable; |
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174 | static G4PhysicsTable* theInverseRangePositronTable; |
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175 | |
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176 | // lab and proper time tables |
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177 | static G4PhysicsTable* theLabTimeElectronTable ; |
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178 | static G4PhysicsTable* theLabTimePositronTable ; |
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179 | static G4PhysicsTable* theProperTimeElectronTable ; |
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180 | static G4PhysicsTable* theProperTimePositronTable ; |
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181 | |
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182 | //processes inherited from G4eLowEnergyLoss |
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183 | //register themselves in the static array Recorder |
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184 | //for electrons/positrons separately |
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185 | //nb of contributing processes = NbOfProcesses |
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186 | static G4int NbOfProcesses; |
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187 | static G4int CounterOfElectronProcess; |
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188 | static G4int CounterOfPositronProcess ; |
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189 | static G4PhysicsTable** RecorderOfElectronProcess; |
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190 | static G4PhysicsTable** RecorderOfPositronProcess; |
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191 | |
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192 | |
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193 | private: |
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194 | |
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195 | G4double GetConstraints(const G4DynamicParticle* aParticle, |
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196 | const G4MaterialCutsCouple* couple); |
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197 | |
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198 | // hide assignment operator |
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199 | G4eLowEnergyLoss (G4eLowEnergyLoss &); |
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200 | G4eLowEnergyLoss & operator=(const G4eLowEnergyLoss &right); |
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201 | |
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202 | |
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203 | G4PhysicsTable* theDEDXTable; |
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204 | |
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205 | G4int CounterOfProcess; |
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206 | G4PhysicsTable** RecorderOfProcess; |
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207 | |
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208 | G4double fdEdx; // computed in GetConstraints |
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209 | G4double fRangeNow; // computed in GetConstraints |
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210 | |
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211 | G4double linLossLimit ; // used in AlongStepDoIt |
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212 | |
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213 | |
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214 | //New ParticleChange |
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215 | G4ParticleChangeForLoss fParticleChange ; |
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216 | |
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217 | // |
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218 | // static part of the class |
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219 | // |
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220 | |
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221 | static G4int NbinEloss; // number of bins in table, |
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222 | // calculated in BuildPhysicTable |
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223 | static G4double LowerBoundEloss; |
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224 | static G4double UpperBoundEloss; |
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225 | static G4double RTable,LOGRTable; // LOGRTable=std::log(UpperBoundEloss- |
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226 | // LowerBoundEloss)/NbinEloss |
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227 | // RTable = std::exp(LOGRTable) |
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228 | |
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229 | //for interpolation within the tables |
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230 | static G4PhysicsTable* theeRangeCoeffATable; |
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231 | static G4PhysicsTable* theeRangeCoeffBTable; |
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232 | static G4PhysicsTable* theeRangeCoeffCTable; |
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233 | static G4PhysicsTable* thepRangeCoeffATable; |
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234 | static G4PhysicsTable* thepRangeCoeffBTable; |
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235 | static G4PhysicsTable* thepRangeCoeffCTable; |
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236 | |
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237 | static G4EnergyLossMessenger* eLossMessenger; |
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238 | |
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239 | G4bool theFluo; // Fluorescence flag |
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240 | |
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241 | }; |
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242 | |
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243 | #include "G4eLowEnergyLoss.icc" |
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244 | |
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245 | #endif |
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246 | |
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