//
// ********************************************************************
// * License and Disclaimer *
// * *
// * The Geant4 software is copyright of the Copyright Holders of *
// * the Geant4 Collaboration. It is provided under the terms and *
// * conditions of the Geant4 Software License, included in the file *
// * LICENSE and available at http://cern.ch/geant4/license . These *
// * include a list of copyright holders. *
// * *
// * Neither the authors of this software system, nor their employing *
// * institutes,nor the agencies providing financial support for this *
// * work make any representation or warranty, express or implied, *
// * regarding this software system or assume any liability for its *
// * use. Please see the license in the file LICENSE and URL above *
// * for the full disclaimer and the limitation of liability. *
// * *
// * This code implementation is the result of the scientific and *
// * technical work of the GEANT4 collaboration. *
// * By using, copying, modifying or distributing the software (or *
// * any work based on the software) you agree to acknowledge its *
// * use in resulting scientific publications, and indicate your *
// * acceptance of all terms of the Geant4 Software license. *
// ********************************************************************
//
//
// $Id: G4VeLowEnergyLoss.hh,v 1.9 2006-06-29 19:37:23 gunter Exp $
// GEANT4 tag $Name: not supported by cvs2svn $
//
// 3.4.2000 Veronique Lefebure:
// Move utils/include/G4VEnergyLoss.hh to
// lowenergy/include/G4VeLowEnergyLoss.hh
//
// ------------------------------------------------------------
// GEANT 4 class header file
//
//
// Class Description
//
// General service class for the energy loss classes
//
// It contains code needed to compute the range tables,
// time tables, the inverse range tables and some auxiliary
// tables.
// The energy loss fluctuation code is here,too.
//
// All the EnergyLoss classes are inherited from G4VeLowEnergyLoss
// class.
//
// -----------------------------------------------------------
// created on 28 January 2000 by L. Urban
// -----------------------------------------------------------
//
// Modifications:
// 20/09/00 V.Ivanchenko update fluctuations
// 23/11/01 V.Ivanchenko Move static member-functions from header to source
// 22/01/03 V.Ivanchenko Cut per range
//
// Class description:
// Abstract class for Low Energy Electromagnetic electron energy loss
// Further documentation available from http://www.ge.infn.it/geant4/lowE
// -----------------------------------------------------------
#ifndef G4VeLowEnergyLoss_h
#define G4VeLowEnergyLoss_h 1
#include "globals.hh"
#include "G4ios.hh"
#include "Randomize.hh"
#include "G4Poisson.hh"
#include "G4Electron.hh"
#include "G4VContinuousDiscreteProcess.hh"
#include "G4PhysicsLogVector.hh"
#include "G4PhysicsLinearVector.hh"
#include "G4MaterialCutsCouple.hh"
class G4VeLowEnergyLoss : public G4VContinuousDiscreteProcess
{
public:
G4VeLowEnergyLoss(const G4String& ,
G4ProcessType aType = fNotDefined );
G4VeLowEnergyLoss(G4VeLowEnergyLoss &);
virtual ~G4VeLowEnergyLoss();
virtual G4double GetContinuousStepLimit(const G4Track& track,
G4double previousStepSize,
G4double currentMinimumStep,
G4double& currentSafety) = 0 ;
virtual G4VParticleChange* AlongStepDoIt(const G4Track& track,
const G4Step& Step) = 0 ;
virtual G4double GetMeanFreePath(const G4Track& track,
G4double previousStepSize,
G4ForceCondition* condition) = 0;
virtual G4VParticleChange* PostStepDoIt(const G4Track& track,
const G4Step& Step) = 0;
protected:// with description
// code for the energy loss fluctuation
G4double GetLossWithFluct(const G4DynamicParticle* aParticle,
const G4MaterialCutsCouple* couple,
G4double MeanLoss,
G4double step);
private:
// hide default constructor and assignment operator as private
G4VeLowEnergyLoss();
G4VeLowEnergyLoss & operator=(const G4VeLowEnergyLoss &right);
protected:
// data members to speed up the fluctuation calculation
const G4Material* lastMaterial;
G4int imat;
G4double f1Fluct,f2Fluct,e1Fluct,e2Fluct,rateFluct,ipotFluct;
G4double e1LogFluct,e2LogFluct,ipotLogFluct;
const G4int nmaxCont1,nmaxCont2 ;
// static part of the class
public: // With description
static void SetRndmStep (G4bool value);
// use / do not use randomisation in energy loss steplimit
// ( default = no randomisation)
static void SetEnlossFluc (G4bool value);
// compute energy loss with/without fluctuation
// ( default : with fluctuation)
static void SetStepFunction (G4double c1, G4double c2);
// sets values for data members used to compute the step limit:
// dRoverRange : max. relative range change in one step,
// finalRange : if range <= finalRange --> last step for the particle.
protected: // With description
// Build range table starting from the DEDXtable
static G4PhysicsTable*
BuildRangeTable(G4PhysicsTable* theDEDXTable,
G4PhysicsTable* theRangeTable,
G4double Tmin,G4double Tmax,G4int nbin);
// Build time tables starting from the DEDXtable
static G4PhysicsTable*
BuildLabTimeTable(G4PhysicsTable* theDEDXTable,
G4PhysicsTable* theLabTimeTable,
G4double Tmin,G4double Tmax,G4int nbin);
static G4PhysicsTable*
BuildProperTimeTable(G4PhysicsTable* theDEDXTable,
G4PhysicsTable* ProperTimeTable,
G4double Tmin,G4double Tmax,G4int nbin);
// Build tables of coefficients needed for inverting the range table
static G4PhysicsTable*
BuildRangeCoeffATable(G4PhysicsTable* theRangeTable,
G4PhysicsTable* theCoeffATable,
G4double Tmin,G4double Tmax,G4int nbin);
static G4PhysicsTable*
BuildRangeCoeffBTable(G4PhysicsTable* theRangeTable,
G4PhysicsTable* theCoeffBTable,
G4double Tmin,G4double Tmax,G4int nbin);
static G4PhysicsTable*
BuildRangeCoeffCTable(G4PhysicsTable* theRangeTable,
G4PhysicsTable* theCoeffCTable,
G4double Tmin,G4double Tmax,G4int nbin);
// Invert range table
static G4PhysicsTable*
BuildInverseRangeTable(G4PhysicsTable* theRangeTable,
G4PhysicsTable* theRangeCoeffATable,
G4PhysicsTable* theRangeCoeffBTable,
G4PhysicsTable* theRangeCoeffCTable,
G4PhysicsTable* theInverseRangeTable,
G4double Tmin,G4double Tmax,G4int nbin);
private:
static void BuildRangeVector(G4PhysicsTable* theDEDXTable,
G4double Tmin,G4double Tmax,G4int nbin,
G4int materialIndex,G4PhysicsLogVector* rangeVector);
static void BuildRangeVectorNew(const G4PhysicsTable*,G4int,
G4int,G4PhysicsLogVector*);
static G4double RangeIntLin(G4PhysicsVector* physicsVector
,G4int nbin);
static G4double RangeIntLog(G4PhysicsVector* physicsVector
,G4int nbin);
static void BuildLabTimeVector(G4PhysicsTable* theDEDXTable,
G4double Tmin,G4double Tmax,G4int nbin,
G4int materialIndex,G4PhysicsLogVector* rangeVector);
static void BuildProperTimeVector(G4PhysicsTable* theDEDXTable,
G4double Tmin,G4double Tmax,G4int nbin,
G4int materialIndex,G4PhysicsLogVector* rangeVector);
static G4double LabTimeIntLog(G4PhysicsVector* physicsVector
,G4int nbin);
static G4double ProperTimeIntLog(G4PhysicsVector* physicsVector,
G4int nbin);
static void InvertRangeVector(G4PhysicsTable* theRangeTable,
G4PhysicsTable* theRangeCoeffATable,
G4PhysicsTable* theRangeCoeffBTable,
G4PhysicsTable* theRangeCoeffCTable,
G4double Tmin,G4double Tmax,G4int nbin,
G4int materialIndex,G4PhysicsLogVector* rangeVector);
// data members
protected:
// variables for the integration routines
static G4double ParticleMass,taulow,tauhigh,ltaulow,ltauhigh;
static G4double dRoverRange; // dRoverRange is the maximum allowed
// deltarange/range in one Step
static G4double finalRange; // final step before stopping
static G4double c1lim,c2lim,c3lim ; // coeffs for computing steplimit
static G4bool rndmStepFlag; // control the randomization of the step
static G4bool EnlossFlucFlag; // control the energy loss fluctuation
};
#endif