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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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: G4VeLowEnergyLoss.hh,v 1.9 2006/06/29 19:37:23 gunter Exp $ |
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28 | // GEANT4 tag $Name: geant4-09-03 $ |
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29 | // |
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30 | // 3.4.2000 Veronique Lefebure: |
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31 | // Move utils/include/G4VEnergyLoss.hh to |
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32 | // lowenergy/include/G4VeLowEnergyLoss.hh |
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33 | // |
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34 | // ------------------------------------------------------------ |
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35 | // GEANT 4 class header file |
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36 | // |
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37 | // |
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38 | // Class Description |
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39 | // |
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40 | // General service class for the energy loss classes |
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41 | // |
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42 | // It contains code needed to compute the range tables, |
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43 | // time tables, the inverse range tables and some auxiliary |
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44 | // tables. |
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45 | // The energy loss fluctuation code is here,too. |
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46 | // |
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47 | // All the EnergyLoss classes are inherited from G4VeLowEnergyLoss |
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48 | // class. |
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49 | // |
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50 | // ----------------------------------------------------------- |
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51 | // created on 28 January 2000 by L. Urban |
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52 | // ----------------------------------------------------------- |
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53 | // |
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54 | // Modifications: |
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55 | // 20/09/00 V.Ivanchenko update fluctuations |
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56 | // 23/11/01 V.Ivanchenko Move static member-functions from header to source |
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57 | // 22/01/03 V.Ivanchenko Cut per range |
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58 | // |
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59 | // Class description: |
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60 | // Abstract class for Low Energy Electromagnetic electron energy loss |
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61 | // Further documentation available from http://www.ge.infn.it/geant4/lowE |
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62 | |
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63 | // ----------------------------------------------------------- |
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64 | |
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65 | #ifndef G4VeLowEnergyLoss_h |
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66 | #define G4VeLowEnergyLoss_h 1 |
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67 | |
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68 | #include "globals.hh" |
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69 | #include "G4ios.hh" |
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70 | #include "Randomize.hh" |
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71 | #include "G4Poisson.hh" |
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72 | #include "G4Electron.hh" |
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73 | #include "G4VContinuousDiscreteProcess.hh" |
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74 | #include "G4PhysicsLogVector.hh" |
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75 | #include "G4PhysicsLinearVector.hh" |
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76 | #include "G4MaterialCutsCouple.hh" |
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77 | |
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78 | class G4VeLowEnergyLoss : public G4VContinuousDiscreteProcess |
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79 | { |
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80 | public: |
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81 | |
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82 | G4VeLowEnergyLoss(const G4String& , |
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83 | G4ProcessType aType = fNotDefined ); |
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84 | G4VeLowEnergyLoss(G4VeLowEnergyLoss &); |
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85 | |
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86 | virtual ~G4VeLowEnergyLoss(); |
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87 | |
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88 | virtual G4double GetContinuousStepLimit(const G4Track& track, |
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89 | G4double previousStepSize, |
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90 | G4double currentMinimumStep, |
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91 | G4double& currentSafety) = 0 ; |
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92 | |
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93 | virtual G4VParticleChange* AlongStepDoIt(const G4Track& track, |
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94 | const G4Step& Step) = 0 ; |
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95 | |
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96 | virtual G4double GetMeanFreePath(const G4Track& track, |
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97 | G4double previousStepSize, |
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98 | G4ForceCondition* condition) = 0; |
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99 | |
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100 | virtual G4VParticleChange* PostStepDoIt(const G4Track& track, |
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101 | const G4Step& Step) = 0; |
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102 | |
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103 | |
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104 | |
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105 | protected:// with description |
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106 | |
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107 | // code for the energy loss fluctuation |
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108 | |
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109 | G4double GetLossWithFluct(const G4DynamicParticle* aParticle, |
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110 | const G4MaterialCutsCouple* couple, |
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111 | G4double MeanLoss, |
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112 | G4double step); |
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113 | |
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114 | |
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115 | private: |
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116 | |
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117 | // hide default constructor and assignment operator as private |
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118 | G4VeLowEnergyLoss(); |
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119 | G4VeLowEnergyLoss & operator=(const G4VeLowEnergyLoss &right); |
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120 | |
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121 | protected: |
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122 | |
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123 | // data members to speed up the fluctuation calculation |
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124 | const G4Material* lastMaterial; |
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125 | G4int imat; |
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126 | G4double f1Fluct,f2Fluct,e1Fluct,e2Fluct,rateFluct,ipotFluct; |
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127 | G4double e1LogFluct,e2LogFluct,ipotLogFluct; |
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128 | |
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129 | const G4int nmaxCont1,nmaxCont2 ; |
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130 | |
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131 | // static part of the class |
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132 | |
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133 | public: // With description |
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134 | |
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135 | static void SetRndmStep (G4bool value); |
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136 | // use / do not use randomisation in energy loss steplimit |
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137 | // ( default = no randomisation) |
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138 | |
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139 | static void SetEnlossFluc (G4bool value); |
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140 | // compute energy loss with/without fluctuation |
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141 | // ( default : with fluctuation) |
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142 | |
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143 | static void SetStepFunction (G4double c1, G4double c2); |
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144 | // sets values for data members used to compute the step limit: |
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145 | // dRoverRange : max. relative range change in one step, |
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146 | // finalRange : if range <= finalRange --> last step for the particle. |
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147 | |
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148 | |
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149 | protected: // With description |
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150 | |
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151 | // Build range table starting from the DEDXtable |
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152 | static G4PhysicsTable* |
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153 | BuildRangeTable(G4PhysicsTable* theDEDXTable, |
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154 | G4PhysicsTable* theRangeTable, |
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155 | G4double Tmin,G4double Tmax,G4int nbin); |
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156 | |
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157 | // Build time tables starting from the DEDXtable |
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158 | static G4PhysicsTable* |
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159 | BuildLabTimeTable(G4PhysicsTable* theDEDXTable, |
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160 | G4PhysicsTable* theLabTimeTable, |
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161 | G4double Tmin,G4double Tmax,G4int nbin); |
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162 | |
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163 | static G4PhysicsTable* |
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164 | BuildProperTimeTable(G4PhysicsTable* theDEDXTable, |
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165 | G4PhysicsTable* ProperTimeTable, |
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166 | G4double Tmin,G4double Tmax,G4int nbin); |
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167 | |
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168 | // Build tables of coefficients needed for inverting the range table |
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169 | static G4PhysicsTable* |
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170 | BuildRangeCoeffATable(G4PhysicsTable* theRangeTable, |
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171 | G4PhysicsTable* theCoeffATable, |
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172 | G4double Tmin,G4double Tmax,G4int nbin); |
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173 | static G4PhysicsTable* |
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174 | BuildRangeCoeffBTable(G4PhysicsTable* theRangeTable, |
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175 | G4PhysicsTable* theCoeffBTable, |
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176 | G4double Tmin,G4double Tmax,G4int nbin); |
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177 | static G4PhysicsTable* |
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178 | BuildRangeCoeffCTable(G4PhysicsTable* theRangeTable, |
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179 | G4PhysicsTable* theCoeffCTable, |
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180 | G4double Tmin,G4double Tmax,G4int nbin); |
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181 | |
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182 | // Invert range table |
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183 | static G4PhysicsTable* |
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184 | BuildInverseRangeTable(G4PhysicsTable* theRangeTable, |
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185 | G4PhysicsTable* theRangeCoeffATable, |
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186 | G4PhysicsTable* theRangeCoeffBTable, |
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187 | G4PhysicsTable* theRangeCoeffCTable, |
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188 | G4PhysicsTable* theInverseRangeTable, |
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189 | G4double Tmin,G4double Tmax,G4int nbin); |
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190 | |
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191 | private: |
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192 | |
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193 | static void BuildRangeVector(G4PhysicsTable* theDEDXTable, |
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194 | G4double Tmin,G4double Tmax,G4int nbin, |
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195 | G4int materialIndex,G4PhysicsLogVector* rangeVector); |
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196 | |
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197 | static void BuildRangeVectorNew(const G4PhysicsTable*,G4int, |
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198 | G4int,G4PhysicsLogVector*); |
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199 | |
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200 | static G4double RangeIntLin(G4PhysicsVector* physicsVector |
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201 | ,G4int nbin); |
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202 | |
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203 | static G4double RangeIntLog(G4PhysicsVector* physicsVector |
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204 | ,G4int nbin); |
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205 | |
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206 | static void BuildLabTimeVector(G4PhysicsTable* theDEDXTable, |
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207 | G4double Tmin,G4double Tmax,G4int nbin, |
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208 | G4int materialIndex,G4PhysicsLogVector* rangeVector); |
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209 | |
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210 | static void BuildProperTimeVector(G4PhysicsTable* theDEDXTable, |
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211 | G4double Tmin,G4double Tmax,G4int nbin, |
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212 | G4int materialIndex,G4PhysicsLogVector* rangeVector); |
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213 | |
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214 | static G4double LabTimeIntLog(G4PhysicsVector* physicsVector |
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215 | ,G4int nbin); |
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216 | |
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217 | static G4double ProperTimeIntLog(G4PhysicsVector* physicsVector, |
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218 | G4int nbin); |
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219 | |
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220 | static void InvertRangeVector(G4PhysicsTable* theRangeTable, |
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221 | G4PhysicsTable* theRangeCoeffATable, |
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222 | G4PhysicsTable* theRangeCoeffBTable, |
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223 | G4PhysicsTable* theRangeCoeffCTable, |
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224 | G4double Tmin,G4double Tmax,G4int nbin, |
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225 | G4int materialIndex,G4PhysicsLogVector* rangeVector); |
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226 | |
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227 | |
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228 | // data members |
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229 | protected: |
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230 | |
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231 | // variables for the integration routines |
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232 | static G4double ParticleMass,taulow,tauhigh,ltaulow,ltauhigh; |
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233 | |
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234 | |
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235 | static G4double dRoverRange; // dRoverRange is the maximum allowed |
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236 | // deltarange/range in one Step |
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237 | static G4double finalRange; // final step before stopping |
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238 | static G4double c1lim,c2lim,c3lim ; // coeffs for computing steplimit |
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239 | |
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240 | static G4bool rndmStepFlag; // control the randomization of the step |
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241 | static G4bool EnlossFlucFlag; // control the energy loss fluctuation |
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242 | |
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243 | |
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244 | }; |
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245 | |
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246 | #endif |
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247 | |
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248 | |
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249 | |
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