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Gabriele Cosmo
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// ********************************************************************
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//
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//
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// $Id: G4MultipleScattering.hh,v 1.1.4.2 2001/06/28 20:19:51 gunter Exp $
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// GEANT4 tag $Name: $
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// $Id: G4MultipleScattering.hh,v 1.5 2001/09/19 13:16:06 maire Exp $
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// GEANT4 tag $Name: geant4-04-00 $
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//
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//------------- G4MultipleScattering physics process --------------------------
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// by Laszlo Urban, March 2001
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//
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// $Id:
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// --------------------------------------------------------------
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// GEANT 4 class header file
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//
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// History: based on object model of
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// 2nd December 1995, G.Cosmo
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// --------- G4MultipleScattering physics process --------
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// by Laszlo Urban, October 1997
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// **************************************************************
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// UNIVERSAL: for arbitrary single charged particle
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// 09/12/98: charge can be != +- 1 !!!! L.Urban
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// 30/09/99: nuclear size effect correction L.Urban
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// --------------------------------------------------------------
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// 22/10/98: cleanup , L.Urban
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// 07-08-01 new methods Store/Retrieve PhysicsTable
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// 23-08-01 new angle and z distribution,energy dependence reduced,
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// Store,Retrieve methods commented out temporarily, L.Urban
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// 11-09-01 G4MultipleScatteringx put as default: G4MultipleScattering
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// Store,Retrieve methods reactived (mma)
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// 13-09-01 Unused TrueToGeomTransformation method deleted,
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// class description (L.Urban)
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// 19-09-01 come back to previous process name msc
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//
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//------------------------------------------------------------------------------
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// class description
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//
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// The class simulates the multiple scattering for any kind
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// of charged particle.
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//
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// class description - end
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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#ifndef G4MultipleScattering_h
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#define G4MultipleScattering_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 "G4EnergyLossTables.hh"
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#include "G4Electron.hh"
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#include "G4Positron.hh"
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#include "G4MuonPlus.hh"
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#include "G4PionPlus.hh"
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#include "G4Proton.hh"
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#include "G4PhysicsLogVector.hh"
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#include "G4GPILSelection.hh"
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#include "G4VContinuousDiscreteProcess.hh"
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#include "G4Step.hh"
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#include "G4Track.hh"
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#include "G4Material.hh"
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#include "G4EnergyLossTables.hh"
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#include "G4GPILSelection.hh"
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#include "G4PhysicsLogVector.hh"
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#include "G4ParticleChangeForMSC.hh"
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#include "G4UnitsTable.hh"
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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class G4MultipleScattering : public G4VContinuousDiscreteProcess
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{
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public:
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public: // with description
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G4MultipleScattering(const G4String& processName="msc") ;
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G4MultipleScattering(const G4String& processName="msc");
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~G4MultipleScattering() ;
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~G4MultipleScattering();
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G4bool IsApplicable ( const G4ParticleDefinition& ) ;
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G4bool IsApplicable ( const G4ParticleDefinition& );
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// returns true for charged particles, false otherwise
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void SetPhysicsTableBining(G4double lowE,G4double highE,G4int nBins);
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void BuildPhysicsTable(const G4ParticleDefinition& aParticleType) ;
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void BuildPhysicsTable(const G4ParticleDefinition& aParticleType);
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// This function overloads the corresponding virtual function
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// of the base class G4VContinuousDiscreteProcess.
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// It is invoked by the G4ParticleWithCuts()::SetCut() method.
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// It prepares the table of the transport mean free paths
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// for every material.
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void PrintInfoDefinition();
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// Print few lines of informations about the process: validity range,
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// origine ..etc..
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// Invoked by BuildPhysicsTable().
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G4bool StorePhysicsTable(G4ParticleDefinition* ,
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const G4String& directory, G4bool);
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// store TransportMeanFreePath tables into an external file
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// specified by 'directory' (must exist before invokation)
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G4bool RetrievePhysicsTable(G4ParticleDefinition* ,
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const G4String& directory, G4bool);
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// retrieve TransportMeanFreePath tables from an external file
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// specified by 'directory'
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G4double AlongStepGetPhysicalInteractionLength(const G4Track&,
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G4double previousStepSize,
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G4double currentMinimumStep,
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G4double& currentSafety,
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G4GPILSelection* selection);
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// The function overloads the corresponding function of the base
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// class.It limits the step near to boundaries only
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// and invokes the method GetContinuousStepLimit at every step.
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G4double GetContinuousStepLimit(const G4Track& aTrack,
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G4double previousStepSize,
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G4double currentMinimumStep,
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G4double& currentSafety) ;
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G4double& currentSafety);
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// It performs the true step length --> geometrical step length
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// transformation. It is invoked by the
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// AlongStepGetPhysicalInteractionLength method.
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G4double GetMeanFreePath(const G4Track& aTrack,
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G4double previousStepSize,
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G4ForceCondition* condition) ;
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G4ForceCondition* condition);
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// It sets the force condition to true only
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// in order to have the PostStepDoIt called at every step.
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// This function overloads a virtual function of the base class.
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// It is invoked by the ProcessManager of the Particle.
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G4VParticleChange* AlongStepDoIt(const G4Track& aTrack,const G4Step& aStep);
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G4VParticleChange* PostStepDoIt(const G4Track& aTrack,const G4Step& aStep) ;
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G4double GetLambda(G4double KineticEnergy,G4Material* material);
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void SetScatteringParameter(G4double value)
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{ scatteringparameter = value ; } ;
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void SetTuning(G4double value) { tuning = value ; };
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void SetCpar (G4double value) { cpar = value ; };
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void SetTlimitmsc (G4double value) { Tlimit = value ; };
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void SetLateralDisplacementFlag(G4bool flag) {fLatDisplFlag = flag;};
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G4double GetTransportMeanFreePath(
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G4double KineticEnergy,G4Material* material);
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// Just a utility method to get the values of the transport
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// mean free path . (It is not used inside the class.)
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void SetNuclCorrPar(G4double val) { NuclCorrPar = val; } ;
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void SetFactPar(G4double val) { FactPar = val ; } ;
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G4VParticleChange* AlongStepDoIt(const G4Track& aTrack,const G4Step& aStep);
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// The geometrical step length --> true path length transformation
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// is performed here (the inverse of the transformation done
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// by GetContinuousStepLimit).
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protected:
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G4VParticleChange* PostStepDoIt(const G4Track& aTrack,const G4Step& aStep);
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// It computes the final state of the particle: samples the
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// scattering angle and computes the lateral displacement.
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// The final state is returned as a ParticleChange object.
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// This function overloads a virtual function of the base class.
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// It is invoked by the ProcessManager of the Particle.
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G4double ComputeTransportCrossSection(
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// Set functions for the different model parameters:
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void Setpalfa(G4double value) {palfa = value;};
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void Setpbeta(G4double value) {pbeta = value;};
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void Setpgamma(G4double value) {pgamma = value;};
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void Setpq0(G4double value) {pq0 = value;};
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void Setpq1(G4double value) {pq1 = value;};
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void Setpc0(G4double value) {pc0 = value;};
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// angle distribution parameters
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void Setpcz(G4double value) {pcz = value;};
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// geom. step length distribution
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void Setdtrl(G4double value) {dtrl = value;};
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// to reduce the energy/step dependence
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void SetBoundary(G4bool value) {boundary = value;};
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void SetFactlim(G4double val) {factlim=val;};
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// parameters needed near to boundary
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void SetTuning(G4double value) {tuning = value;};
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void SetCparm (G4double value) {cparm = value;};
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// tuning of the transport mean free path
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void SetLateralDisplacementFlag(G4bool flag) {fLatDisplFlag = flag;};
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// lateral displacement to be/not to be computed
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void SetNuclCorrPar(G4double val) {NuclCorrPar = val;};
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void SetFactPar(G4double val) {FactPar = val;};
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// corrs to transport cross section for high energy
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protected: // with description
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virtual G4double ComputeTransportCrossSection(
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const G4ParticleDefinition& aParticleType,
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G4double KineticEnergy,
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G4double AtomicNumber,
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G4double AtomicWeight) ;
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G4double TrueToGeomTransformation(const G4DynamicParticle* aParticle,
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G4Material* aMaterial,
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G4double truePathLength) ;
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G4double AtomicWeight);
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// It computes the transport cross section.
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// The transport mean free path is 1/(transport cross section).
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private:
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// hide assignment operator as private
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G4MultipleScattering & operator = (const G4MultipleScattering &right) ;
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G4MultipleScattering ( const G4MultipleScattering &) ;
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G4MultipleScattering & operator = (const G4MultipleScattering &right);
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G4MultipleScattering ( const G4MultipleScattering &);
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private: // data members
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// data members ...................................................
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private:
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G4PhysicsTable* theTransportMeanFreePathTable;
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G4PhysicsTable* theTransportMeanFreePathTable ;
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G4double fTransportMeanFreePath;
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G4double fTransportMeanFreePath ;
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G4double range,alpha1 ;
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G4int stepFlag ;
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G4double biglambda,taubig,tausmall,taulim;
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G4double biglambda ;
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G4double LowestKineticEnergy ;
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G4double HighestKineticEnergy ;
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G4int TotBin ;
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const G4Electron* theElectron ;
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const G4Positron* thePositron ;
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G4double LowestKineticEnergy;
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G4double HighestKineticEnergy;
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G4int TotBin;
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G4Material* lastMaterial;
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G4double lastKineticEnergy;
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G4int materialIndex ;
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G4double lastKineticEnergy;
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G4int materialIndex;
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G4double tLast ;
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G4double zLast ;
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G4double Tlimit ;
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G4double tLast;
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G4double zLast;
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// model parameters
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G4double scatteringparameter;
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G4double tuning;
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G4double cpar;
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G4bool boundary; // spec. handling near boundaries
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G4double factlim;
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G4GPILSelection valueGPILSelectionMSC;
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G4double pcz,zmean; // z(geom.step length)
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// distribution
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G4double palfa,pbeta,pgamma,pq0,pq1,pc0; // parameters of angle
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// disrtibution
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G4double range,T1,lambda1,cth1,z1,t1,dtrl; // used to reduce the energy
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// (or step length) dependence
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G4double tuning; // param. for lambda tuning
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G4double cparm; // "
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// with/without lateral displacement
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G4bool fLatDisplFlag ;
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G4bool fLatDisplFlag;
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// nuclear size effect correction
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G4double NuclCorrPar ;
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G4double FactPar ;
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G4double NuclCorrPar;
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G4double FactPar;
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//New ParticleChange
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G4ParticleChangeForMSC fParticleChange ;
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G4ParticleChangeForMSC fParticleChange;
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};
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#include "G4MultipleScattering.icc"
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