Gabriele Cosmo
247 lines
9.3 KiB
C++
247 lines
9.3 KiB
C++
//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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//
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// $Id: G4eLowEnergyLoss.hh,v 1.14 2006/06/29 19:37:42 gunter Exp $
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// GEANT4 tag $Name: geant4-09-01 $
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//
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// -------------------------------------------------------------------
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// Class description:
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// Low Energy electromagnetic process, electron energy loss
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// Further documentation available from http://www.ge.infn.it/geant4/lowE
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// -------------------------------------------------------------------
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//
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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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//
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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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// 18.10.01 Revision to improve code quality and consistency with design
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// 23.11.01 V.Ivanchenko Move static member-functions from header to source
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// 28.03.02 V.Ivanchenko add fluorescence flag
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// 21.01.03 V.Ivanchenko cut per region
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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 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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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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static void SetNbOfProcesses(G4int nb);
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// Sets number of processes giving contribution to the energy loss
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static void PlusNbOfProcesses();
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// Increases number of processes giving contribution to the energy loss
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static void MinusNbOfProcesses();
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// Decreases number of processes giving contribution to the energy loss
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static G4int GetNbOfProcesses();
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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);
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static void SetUpperBoundEloss(G4double val);
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static void SetNbinEloss(G4int nb);
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static G4double GetLowerBoundEloss();
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static G4double GetUpperBoundEloss();
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static G4int GetNbinEloss();
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void ActivateFluorescence(G4bool val);
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// Set fluorescence flag on/off
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G4bool Fluorescence() const;
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// Get flurescence flag
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protected:
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virtual std::vector<G4DynamicParticle*>* DeexciteAtom(const G4MaterialCutsCouple* ,
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G4double, G4double) // incidentEnergy, eLoss
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{ return 0; };
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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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//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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G4double GetConstraints(const G4DynamicParticle* aParticle,
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const G4MaterialCutsCouple* couple);
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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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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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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=std::log(UpperBoundEloss-
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// LowerBoundEloss)/NbinEloss
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// RTable = std::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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G4bool theFluo; // Fluorescence flag
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};
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#include "G4eLowEnergyLoss.icc"
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#endif
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