Gabriele Cosmo
220 lines
7.9 KiB
C++
220 lines
7.9 KiB
C++
// This code implementation is the intellectual property of
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// the GEANT4 collaboration.
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//
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// By copying, distributing or modifying the Program (or any work
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// based on the Program) you indicate your acceptance of this statement,
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// and all its terms.
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//
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// $Id: G4eLowEnergyLoss.hh,v 1.1 2000/04/04 13:47:35 lefebure Exp $
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// GEANT4 tag $Name: geant4-03-00 $
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//
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// ------------------------------------------------------------
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// GEANT 4 class header file
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//
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// For information related to this code contact:
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// CERN, IT Division, ASD group
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// History: first implementation, based on object model of
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// 2nd December 1995, G.Cosmo
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// ---------- G4eLowEnergyLoss physics process -----------
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// by Laszlo Urban, 20 March 1997
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//
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// 27.05.98 OldGetRange removed + other corrs , L.Urban
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// 10.09.98 cleanup
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// 16.10.98 public method SetStepFunction() + messenger class
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// 20.01.99 new data members , L.Urban
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// 10.02.00 modifications, new e.m. structure , L.Urban
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// ------------------------------------------------------------
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#ifndef G4eLowEnergyLoss_h
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#define G4eLowEnergyLoss_h 1
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#include "G4ios.hh"
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#include "globals.hh"
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#include "Randomize.hh"
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#include "G4VeLowEnergyLoss.hh"
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#include "G4Material.hh"
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#include "G4Element.hh"
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#include "G4ParticleChangeForLoss.hh"
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#include "globals.hh"
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#include "G4Track.hh"
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#include "G4Step.hh"
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#include "G4Electron.hh"
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#include "G4Positron.hh"
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#include "G4PhysicsLogVector.hh"
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#include "G4PhysicsLinearVector.hh"
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#include "G4EnergyLossTables.hh"
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// Class description:
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// This class is the implementation of the unified Energy Loss process.
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// It calculates the continuous energy loss for e+/e-.
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// The following processes give contributions to the continuous
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// energy loss (by default) :
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// --- ionisation (= cont.ion.loss + delta ray production)
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// --- bremsstrahlung (= cont.loss due to soft brems+discrete bremsstrahlung)
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// more can be added ..........
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// This class creates static dE/dx and range tables for e+ and e-,
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// which tables can be used by other processes , too.
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// G4eLowEnergyLoss is the base class for the processes giving contribution
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// to the (continuous) energy loss of e+/e- .
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// Class description - end
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class G4EnergyLossMessenger;
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class G4eLowEnergyLoss : public G4VeLowEnergyLoss
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{
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public:
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G4eLowEnergyLoss(const G4String& );
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~G4eLowEnergyLoss();
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public: // With description
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G4bool IsApplicable(const G4ParticleDefinition&);
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// true for e+/e- , false otherwise
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void BuildDEDXTable(const G4ParticleDefinition& aParticleType);
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// It builds dE/dx and range tables for aParticleType and
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// for every material contained in the materialtable.
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G4double GetContinuousStepLimit(const G4Track& track,
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G4double previousStepSize,
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G4double currentMinimumStep,
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G4double& currentSafety);
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// Computes the steplimit due to the energy loss process.
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G4VParticleChange* AlongStepDoIt(const G4Track& track,
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const G4Step& Step) ;
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// Performs the computation of the (continuous) energy loss
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// after the step (with fluctuation).
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virtual G4double GetMeanFreePath(const G4Track& track,
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G4double previousStepSize,
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G4ForceCondition* condition) = 0;
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// Virtual function to be overridden in the derived classes
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// ( ionisation and bremsstrahlung) .
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virtual G4VParticleChange* PostStepDoIt(const G4Track& track,
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const G4Step& Step) = 0;
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// Virtual function to be overridden in the derived classes
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// ( ionisation and bremsstrahlung) .
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private:
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G4double GetConstraints(const G4DynamicParticle* aParticle,
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G4Material* aMaterial);
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// hide assignment operator
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G4eLowEnergyLoss (G4eLowEnergyLoss &);
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G4eLowEnergyLoss & operator=(const G4eLowEnergyLoss &right);
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protected:
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G4PhysicsTable* theLossTable;
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G4double MinKineticEnergy ; // particle with kinetic energy
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// smaller than MinKineticEnergy
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// is stopped in AlongStepDoIt
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G4double Charge,lastCharge ;
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private:
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G4PhysicsTable* theDEDXTable;
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G4int CounterOfProcess;
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G4PhysicsTable** RecorderOfProcess;
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G4double fdEdx; // computed in GetConstraints
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G4double fRangeNow; // computed in GetConstraints
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G4double linLossLimit ; // used in AlongStepDoIt
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//New ParticleChange
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G4ParticleChangeForLoss fParticleChange ;
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//
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// static part of the class
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//
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public: // With description
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static void SetNbOfProcesses(G4int nb) {NbOfProcesses=nb;};
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// Sets number of processes giving contribution to the energy loss
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static void PlusNbOfProcesses() {NbOfProcesses++ ;};
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// Increases number of processes giving contribution to the energy loss
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static void MinusNbOfProcesses() {NbOfProcesses-- ;};
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// Decreases number of processes giving contribution to the energy loss
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static G4int GetNbOfProcesses() {return NbOfProcesses;};
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// Gets number of processes giving contribution to the energy loss
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// ( default value = 2)
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static void SetLowerBoundEloss(G4double val) {LowerBoundEloss=val;};
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static void SetUpperBoundEloss(G4double val) {UpperBoundEloss=val;};
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static void SetNbinEloss(G4int nb) {NbinEloss=nb;};
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static G4double GetLowerBoundEloss() {return LowerBoundEloss;};
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static G4double GetUpperBoundEloss() {return UpperBoundEloss;};
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static G4int GetNbinEloss() {return NbinEloss;};
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protected:
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//basic DEDX and Range tables
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static G4PhysicsTable* theDEDXElectronTable ;
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static G4PhysicsTable* theDEDXPositronTable ;
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static G4PhysicsTable* theRangeElectronTable ;
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static G4PhysicsTable* theRangePositronTable ;
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//inverse tables of the range tables
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static G4PhysicsTable* theInverseRangeElectronTable;
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static G4PhysicsTable* theInverseRangePositronTable;
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// lab and proper time tables
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static G4PhysicsTable* theLabTimeElectronTable ;
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static G4PhysicsTable* theLabTimePositronTable ;
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static G4PhysicsTable* theProperTimeElectronTable ;
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static G4PhysicsTable* theProperTimePositronTable ;
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//processes inherited from G4eLowEnergyLoss
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//register themselves in the static array Recorder
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//for electrons/positrons separately
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//nb of contributing processes = NbOfProcesses
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static G4int NbOfProcesses;
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static G4int CounterOfElectronProcess;
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static G4int CounterOfPositronProcess ;
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static G4PhysicsTable** RecorderOfElectronProcess;
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static G4PhysicsTable** RecorderOfPositronProcess;
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private:
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static G4int NbinEloss; // number of bins in table,
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// calculated in BuildPhysicTable
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static G4double LowerBoundEloss;
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static G4double UpperBoundEloss;
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static G4double RTable,LOGRTable; // LOGRTable=log(UpperBoundEloss-
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// LowerBoundEloss)/NbinEloss
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// RTable = exp(LOGRTable)
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//for interpolation within the tables
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static G4PhysicsTable* theeRangeCoeffATable;
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static G4PhysicsTable* theeRangeCoeffBTable;
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static G4PhysicsTable* theeRangeCoeffCTable;
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static G4PhysicsTable* thepRangeCoeffATable;
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static G4PhysicsTable* thepRangeCoeffBTable;
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static G4PhysicsTable* thepRangeCoeffCTable;
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static G4EnergyLossMessenger* eLossMessenger;
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};
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#include "G4eLowEnergyLoss.icc"
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#endif
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