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2 | // ******************************************************************** |
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3 | // * License and Disclaimer * |
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9 | // * include a list of copyright holders. * |
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10 | // * * |
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11 | // * Neither the authors of this software system, nor their employing * |
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13 | // * work make any representation or warranty, express or implied, * |
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14 | // * regarding this software system or assume any liability for its * |
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15 | // * use. Please see the license in the file LICENSE and URL above * |
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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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23 | // * acceptance of all terms of the Geant4 Software license. * |
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24 | // ******************************************************************** |
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25 | // |
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26 | // $Id: G4GoudsmitSaundersonMscModel.hh,v 1.2 2009/06/04 13:45:49 gunter Exp $ |
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27 | // GEANT4 tag $Name: geant4-09-03 $ |
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28 | // |
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29 | // ------------------------------------------------------------------- |
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30 | // |
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31 | // |
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32 | // GEANT4 Class header file |
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33 | // |
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34 | // |
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35 | // File name: G4GoudsmitSaundersonMscModel |
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36 | // |
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37 | // Author: Omrane Kadri |
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38 | // |
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39 | // Creation date: 20.02.2009 |
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40 | // |
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41 | // Modifications: |
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42 | // 04.03.2009 V.Ivanchenko cleanup and format according to Geant4 EM style |
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43 | // |
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44 | // Class description: |
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45 | // |
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46 | // Multiple scattering model using classical Goudsmit-Saunderson model |
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47 | // |
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48 | //@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ |
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49 | //REFERENCES: |
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50 | //Ref.1:E. Benedito et al.,"Mixed simulation ... cross-sections", NIMB 174 (2001) pp 91-110; |
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51 | //Ref.2:I. Kawrakow et al.,"On the condensed ... transport",NIMB 142 (1998) pp 253-280; |
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52 | //Ref.3:I. Kawrakow et al.,"On the representation ... calculations",NIMB 134 (1998) pp 325-336; |
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53 | //Ref.4:I. Kawrakow et al.,"The EGSnrc code ... Transport",NRCC Report PIRS-701, Sept. 21, 2006; |
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54 | //Ref.5:F. Salvat et al.,"ELSEPA--Dirac partial ...molecules", Comp. Phys. Comm. 165 (2005) pp 157-190; |
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55 | //Ref.6:G4UrbanMscModel G4_v9.1Ref09; |
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56 | //Ref.7:G4eCoulombScatteringModel G4_v9.1Ref09. |
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57 | //@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ |
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58 | |
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59 | #ifndef G4GoudsmitSaundersonMscModel_h |
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60 | #define G4GoudsmitSaundersonMscModel_h 1 |
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61 | |
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62 | #include "G4VMscModel.hh" |
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63 | #include "G4PhysicsTable.hh" |
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64 | #include "globals.hh" |
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65 | #include "G4DataInterpolation.hh" |
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66 | |
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67 | class G4DataVector; |
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68 | class G4ParticleChangeForMSC; |
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69 | class G4LossTableManager; |
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70 | class G4GoudsmitSaundersonTable; |
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71 | class G4PhysicsTable; |
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72 | |
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73 | class G4GoudsmitSaundersonMscModel : public G4VMscModel |
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74 | { |
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75 | public: |
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76 | |
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77 | G4GoudsmitSaundersonMscModel(const G4String& nam = "GoudsmitSaunderson"); |
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78 | |
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79 | virtual ~G4GoudsmitSaundersonMscModel(); |
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80 | |
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81 | virtual void Initialise(const G4ParticleDefinition*, const G4DataVector&); |
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82 | |
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83 | virtual G4double ComputeCrossSectionPerAtom(const G4ParticleDefinition* particle, |
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84 | G4double KineticEnergy, |
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85 | G4double AtomicNumber, G4double, |
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86 | G4double, G4double); |
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87 | |
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88 | virtual void SampleScattering(const G4DynamicParticle* , |
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89 | G4double ); |
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90 | |
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91 | virtual G4double ComputeTruePathLengthLimit( |
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92 | const G4Track& track, |
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93 | G4PhysicsTable* theLambdaTable, |
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94 | G4double currentMinimalStep); |
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95 | |
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96 | virtual G4double ComputeGeomPathLength(G4double truePathLength); |
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97 | |
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98 | virtual G4double ComputeTrueStepLength(G4double geomStepLength); |
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99 | |
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100 | private: |
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101 | void SampleCosineTheta(G4double,G4double,G4double &,G4double &); |
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102 | |
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103 | void CalculateIntegrals(const G4ParticleDefinition* ,G4double,G4double, |
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104 | G4double&,G4double&); |
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105 | |
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106 | void LoadELSEPAXSections(); |
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107 | |
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108 | inline void SetParticle(const G4ParticleDefinition* p); |
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109 | |
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110 | inline G4double GetLambda(G4double); |
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111 | |
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112 | // hide assignment operator |
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113 | G4GoudsmitSaundersonMscModel & operator=(const G4GoudsmitSaundersonMscModel &right); |
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114 | G4GoudsmitSaundersonMscModel(const G4GoudsmitSaundersonMscModel&); |
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115 | |
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116 | G4double lowKEnergy; |
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117 | G4double highKEnergy; |
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118 | G4double currentKinEnergy; |
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119 | G4double currentRange; |
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120 | |
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121 | G4double smallstep,tlimitminfix,skindepth; |
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122 | G4double fr,rangeinit,masslimite,tgeom; |
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123 | G4double par1,par2,par3,zPathLength,truePathLength; |
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124 | G4double tausmall,taulim,tlimit,tlimitmin,geommin,geombig; |
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125 | G4double charge,lambdalimit; |
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126 | G4double tPathLength,stepmin ; |
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127 | G4double lambda1,lambda11; |
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128 | G4double mass; |
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129 | G4double lambda0; |
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130 | G4int currentMaterialIndex; |
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131 | |
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132 | G4bool inside; |
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133 | G4bool insideskin; |
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134 | G4bool isInitialized; |
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135 | |
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136 | G4PhysicsTable* theLambdaTable; |
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137 | G4GoudsmitSaundersonTable* GSTable; |
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138 | G4LossTableManager* theManager; |
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139 | const G4ParticleDefinition* particle; |
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140 | G4ParticleChangeForMSC* fParticleChange; |
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141 | G4DataInterpolation* MyValue; |
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142 | const G4MaterialCutsCouple* currentCouple; |
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143 | |
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144 | static G4double ener[106]; |
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145 | static G4double TCSE[103][106]; |
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146 | static G4double FTCSE[103][106]; |
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147 | static G4double TCSP[103][106]; |
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148 | static G4double FTCSP[103][106]; |
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149 | |
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150 | }; |
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151 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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152 | |
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153 | inline |
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154 | void G4GoudsmitSaundersonMscModel::SetParticle(const G4ParticleDefinition* p) |
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155 | { |
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156 | if (p != particle) { |
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157 | particle = p; |
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158 | mass = p->GetPDGMass(); |
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159 | charge = p->GetPDGCharge()/eplus; |
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160 | } |
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161 | } |
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162 | |
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163 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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164 | |
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165 | inline G4double G4GoudsmitSaundersonMscModel::GetLambda(G4double e) |
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166 | { |
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167 | G4double x; |
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168 | if(theLambdaTable) { |
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169 | G4bool b; |
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170 | x = ((*theLambdaTable)[currentMaterialIndex])->GetValue(e, b); |
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171 | } else { |
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172 | x = CrossSection(currentCouple,particle,e); |
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173 | } |
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174 | |
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175 | if(x > DBL_MIN) x = 1./x; |
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176 | else x = DBL_MAX; |
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177 | return x; |
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178 | } |
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179 | |
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180 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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181 | |
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182 | #endif |
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183 | |
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