Gabriele Cosmo
246 lines
9.4 KiB
C++
246 lines
9.4 KiB
C++
//
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// ********************************************************************
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// * DISCLAIMER *
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// * *
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// * The following disclaimer summarizes all the specific disclaimers *
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// * of contributors to this software. The specific disclaimers,which *
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// * govern, are listed with their locations in: *
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// * http://cern.ch/geant4/license *
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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. *
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// * *
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// * This code implementation is the intellectual property of the *
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// * GEANT4 collaboration. *
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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 *
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// * statement, and all its terms. *
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// ********************************************************************
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//
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//
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// $Id: G4VeLowEnergyLoss.hh,v 1.7 2001/11/23 11:45:20 vnivanch Exp $
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// GEANT4 tag $Name: geant4-05-00 $
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//
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// 3.4.2000 Veronique Lefebure:
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// Move utils/include/G4VEnergyLoss.hh to
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// lowenergy/include/G4VeLowEnergyLoss.hh
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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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//
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// Class Description
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//
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// General service class for the energy loss classes
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//
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// It contains code needed to compute the range tables,
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// time tables, the inverse range tables and some auxiliary
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// tables.
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// The energy loss fluctuation code is here,too.
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//
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// All the EnergyLoss classes are inherited from G4VeLowEnergyLoss
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// class.
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//
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// -----------------------------------------------------------
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// created on 28 January 2000 by L. Urban
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// -----------------------------------------------------------
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//
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// Modifications:
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// 20/09/00 V.Ivanchenko update fluctuations
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// 23/11/01 V.Ivanchenko Move static member-functions from header to source
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//
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// Class description:
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// Abstract class for Low Energy Electromagnetic 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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#ifndef G4VeLowEnergyLoss_h
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#define G4VeLowEnergyLoss_h 1
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#include "globals.hh"
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#include "G4ios.hh"
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#include "Randomize.hh"
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#include "G4Poisson.hh"
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#include "G4Electron.hh"
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#include "G4VContinuousDiscreteProcess.hh"
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#include "G4PhysicsLogVector.hh"
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#include "G4PhysicsLinearVector.hh"
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class G4VeLowEnergyLoss : public G4VContinuousDiscreteProcess
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{
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public:
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G4VeLowEnergyLoss(const G4String& ,
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G4ProcessType aType = fNotDefined );
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G4VeLowEnergyLoss(G4VeLowEnergyLoss &);
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virtual ~G4VeLowEnergyLoss();
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virtual G4double GetContinuousStepLimit(const G4Track& track,
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G4double previousStepSize,
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G4double currentMinimumStep,
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G4double& currentSafety) = 0 ;
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virtual G4VParticleChange* AlongStepDoIt(const G4Track& track,
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const G4Step& Step) = 0 ;
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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 G4VParticleChange* PostStepDoIt(const G4Track& track,
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const G4Step& Step) = 0;
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protected:// with description
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// code for the energy loss fluctuation
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G4double GetLossWithFluct(const G4DynamicParticle* aParticle,
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G4Material* aMaterial,
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G4double MeanLoss,
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G4double step);
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private:
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// hide default constructor and assignment operator as private
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G4VeLowEnergyLoss();
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G4VeLowEnergyLoss & operator=(const G4VeLowEnergyLoss &right);
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protected:
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// data members to speed up the fluctuation calculation
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G4Material* lastMaterial;
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G4int imat;
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G4double f1Fluct,f2Fluct,e1Fluct,e2Fluct,rateFluct,ipotFluct;
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G4double e1LogFluct,e2LogFluct,ipotLogFluct;
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const G4int nmaxCont1,nmaxCont2 ;
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// static part of the class
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public: // With description
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static void SetRndmStep (G4bool value);
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// use / do not use randomisation in energy loss steplimit
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// ( default = no randomisation)
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static void SetEnlossFluc (G4bool value);
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// compute energy loss with/without fluctuation
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// ( default : with fluctuation)
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static void SetStepFunction (G4double c1, G4double c2);
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// sets values for data members used to compute the step limit:
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// dRoverRange : max. relative range change in one step,
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// finalRange : if range <= finalRange --> last step for the particle.
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protected: // With description
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// Build range table starting from the DEDXtable
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static G4PhysicsTable*
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BuildRangeTable(G4PhysicsTable* theDEDXTable,
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G4PhysicsTable* theRangeTable,
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G4double Tmin,G4double Tmax,G4int nbin);
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// Build time tables starting from the DEDXtable
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static G4PhysicsTable*
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BuildLabTimeTable(G4PhysicsTable* theDEDXTable,
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G4PhysicsTable* theLabTimeTable,
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G4double Tmin,G4double Tmax,G4int nbin);
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static G4PhysicsTable*
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BuildProperTimeTable(G4PhysicsTable* theDEDXTable,
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G4PhysicsTable* ProperTimeTable,
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G4double Tmin,G4double Tmax,G4int nbin);
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// Build tables of coefficients needed for inverting the range table
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static G4PhysicsTable*
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BuildRangeCoeffATable(G4PhysicsTable* theRangeTable,
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G4PhysicsTable* theCoeffATable,
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G4double Tmin,G4double Tmax,G4int nbin);
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static G4PhysicsTable*
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BuildRangeCoeffBTable(G4PhysicsTable* theRangeTable,
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G4PhysicsTable* theCoeffBTable,
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G4double Tmin,G4double Tmax,G4int nbin);
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static G4PhysicsTable*
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BuildRangeCoeffCTable(G4PhysicsTable* theRangeTable,
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G4PhysicsTable* theCoeffCTable,
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G4double Tmin,G4double Tmax,G4int nbin);
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// Invert range table
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static G4PhysicsTable*
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BuildInverseRangeTable(G4PhysicsTable* theRangeTable,
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G4PhysicsTable* theRangeCoeffATable,
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G4PhysicsTable* theRangeCoeffBTable,
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G4PhysicsTable* theRangeCoeffCTable,
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G4PhysicsTable* theInverseRangeTable,
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G4double Tmin,G4double Tmax,G4int nbin);
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private:
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static void BuildRangeVector(G4PhysicsTable* theDEDXTable,
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G4double Tmin,G4double Tmax,G4int nbin,
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G4int materialIndex,G4PhysicsLogVector* rangeVector);
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static void BuildRangeVectorNew(const G4PhysicsTable*,G4int,
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G4int,G4PhysicsLogVector*);
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static G4double RangeIntLin(G4PhysicsVector* physicsVector
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,G4int nbin);
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static G4double RangeIntLog(G4PhysicsVector* physicsVector
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,G4int nbin);
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static void BuildLabTimeVector(G4PhysicsTable* theDEDXTable,
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G4double Tmin,G4double Tmax,G4int nbin,
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G4int materialIndex,G4PhysicsLogVector* rangeVector);
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static void BuildProperTimeVector(G4PhysicsTable* theDEDXTable,
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G4double Tmin,G4double Tmax,G4int nbin,
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G4int materialIndex,G4PhysicsLogVector* rangeVector);
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static G4double LabTimeIntLog(G4PhysicsVector* physicsVector
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,G4int nbin);
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static G4double ProperTimeIntLog(G4PhysicsVector* physicsVector,
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G4int nbin);
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static void InvertRangeVector(G4PhysicsTable* theRangeTable,
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G4PhysicsTable* theRangeCoeffATable,
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G4PhysicsTable* theRangeCoeffBTable,
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G4PhysicsTable* theRangeCoeffCTable,
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G4double Tmin,G4double Tmax,G4int nbin,
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G4int materialIndex,G4PhysicsLogVector* rangeVector);
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// data members
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protected:
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// variables for the integration routines
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static G4double ParticleMass,taulow,tauhigh,ltaulow,ltauhigh;
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static G4double dRoverRange; // dRoverRange is the maximum allowed
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// deltarange/range in one Step
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static G4double finalRange; // final step before stopping
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static G4double c1lim,c2lim,c3lim ; // coeffs for computing steplimit
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static G4bool rndmStepFlag; // control the randomization of the step
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static G4bool EnlossFlucFlag; // control the energy loss fluctuation
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};
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#endif
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