| 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: G4eLowEnergyLoss.hh,v 1.14 2006/06/29 19:37:42 gunter Exp $
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| 28 | // GEANT4 tag $Name: geant4-09-03-cand-01 $
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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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