[819] | 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: G4VeLowEnergyLoss.hh,v 1.9 2006/06/29 19:37:23 gunter Exp $ |
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[1337] | 28 | // GEANT4 tag $Name: geant4-09-04-beta-01 $ |
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[819] | 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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