G4AdjointIonIonisationModel Class Reference

#include <G4AdjointIonIonisationModel.hh>

Inheritance diagram for G4AdjointIonIonisationModel:

Collaboration diagram for G4AdjointIonIonisationModel:

Public Member Functions
	G4AdjointIonIonisationModel ()
virtual	~G4AdjointIonIonisationModel ()
virtual void	SampleSecondaries (const G4Track &aTrack, G4bool IsScatProjToProjCase, G4ParticleChange *fParticleChange)
virtual G4double	DiffCrossSectionPerAtomPrimToSecond (G4double kinEnergyProj, G4double kinEnergyProd, G4double Z, G4double A=0.)
virtual void	CorrectPostStepWeight (G4ParticleChange *fParticleChange, G4double old_weight, G4double adjointPrimKinEnergy, G4double projectileKinEnergy, G4bool IsScatProjToProjCase)
virtual G4double	GetSecondAdjEnergyMaxForScatProjToProjCase (G4double PrimAdjEnergy)
virtual G4double	GetSecondAdjEnergyMinForScatProjToProjCase (G4double PrimAdjEnergy, G4double Tcut=0)
virtual G4double	GetSecondAdjEnergyMaxForProdToProjCase (G4double PrimAdjEnergy)
virtual G4double	GetSecondAdjEnergyMinForProdToProjCase (G4double PrimAdjEnergy)
void	SetUseOnlyBragg (G4bool aBool)
void	SetIon (G4ParticleDefinition *adj_ion, G4ParticleDefinition *fwd_ion)
Public Member Functions inherited from G4VEmAdjointModel
	G4VEmAdjointModel (const G4String &nam)
virtual	~G4VEmAdjointModel ()
virtual G4double	AdjointCrossSection (const G4MaterialCutsCouple *aCouple, G4double primEnergy, G4bool IsScatProjToProjCase)
virtual G4double	GetAdjointCrossSection (const G4MaterialCutsCouple *aCouple, G4double primEnergy, G4bool IsScatProjToProjCase)
virtual G4double	DiffCrossSectionPerAtomPrimToScatPrim (G4double kinEnergyProj, G4double kinEnergyScatProj, G4double Z, G4double A=0.)
virtual G4double	DiffCrossSectionPerVolumePrimToSecond (const G4Material *aMaterial, G4double kinEnergyProj, G4double kinEnergyProd)
virtual G4double	DiffCrossSectionPerVolumePrimToScatPrim (const G4Material *aMaterial, G4double kinEnergyProj, G4double kinEnergyScatProj)
void	DefineCurrentMaterial (const G4MaterialCutsCouple *couple)
std::vector< std::vector < double > * >	ComputeAdjointCrossSectionVectorPerAtomForSecond (G4double kinEnergyProd, G4double Z, G4double A=0., G4int nbin_pro_decade=10)
std::vector< std::vector < double > * >	ComputeAdjointCrossSectionVectorPerAtomForScatProj (G4double kinEnergyProd, G4double Z, G4double A=0., G4int nbin_pro_decade=10)
std::vector< std::vector < double > * >	ComputeAdjointCrossSectionVectorPerVolumeForSecond (G4Material *aMaterial, G4double kinEnergyProd, G4int nbin_pro_decade=10)
std::vector< std::vector < double > * >	ComputeAdjointCrossSectionVectorPerVolumeForScatProj (G4Material *aMaterial, G4double kinEnergyProd, G4int nbin_pro_decade=10)
void	SetCSMatrices (std::vector< G4AdjointCSMatrix * > *Vec1CSMatrix, std::vector< G4AdjointCSMatrix * > *Vec2CSMatrix)
G4ParticleDefinition *	GetAdjointEquivalentOfDirectPrimaryParticleDefinition ()
G4ParticleDefinition *	GetAdjointEquivalentOfDirectSecondaryParticleDefinition ()
G4double	GetHighEnergyLimit ()
G4double	GetLowEnergyLimit ()
void	SetHighEnergyLimit (G4double aVal)
void	SetLowEnergyLimit (G4double aVal)
void	DefineDirectEMModel (G4VEmModel *aModel)
void	SetAdjointEquivalentOfDirectPrimaryParticleDefinition (G4ParticleDefinition *aPart)
void	SetAdjointEquivalentOfDirectSecondaryParticleDefinition (G4ParticleDefinition *aPart)
void	SetSecondPartOfSameType (G4bool aBool)
G4bool	GetSecondPartOfSameType ()
void	SetUseMatrix (G4bool aBool)
void	SetUseMatrixPerElement (G4bool aBool)
void	SetUseOnlyOneMatrixForAllElements (G4bool aBool)
void	SetApplyCutInRange (G4bool aBool)
G4bool	GetUseMatrix ()
G4bool	GetUseMatrixPerElement ()
G4bool	GetUseOnlyOneMatrixForAllElements ()
G4bool	GetApplyCutInRange ()
G4String	GetName ()
virtual void	SetCSBiasingFactor (G4double aVal)
void	SetCorrectWeightForPostStepInModel (G4bool aBool)
void	SetAdditionalWeightCorrectionFactorForPostStepOutsideModel (G4double factor)

Additional Inherited Members
Protected Member Functions inherited from G4VEmAdjointModel
G4double	DiffCrossSectionFunction1 (G4double kinEnergyProj)
G4double	DiffCrossSectionFunction2 (G4double kinEnergyProj)
G4double	DiffCrossSectionPerVolumeFunctionForIntegrationOverEkinProj (G4double EkinProd)
G4double	SampleAdjSecEnergyFromCSMatrix (size_t MatrixIndex, G4double prim_energy, G4bool IsScatProjToProjCase)
G4double	SampleAdjSecEnergyFromCSMatrix (G4double prim_energy, G4bool IsScatProjToProjCase)
void	SelectCSMatrix (G4bool IsScatProjToProjCase)
virtual G4double	SampleAdjSecEnergyFromDiffCrossSectionPerAtom (G4double prim_energy, G4bool IsScatProjToProjCase)
Protected Attributes inherited from G4VEmAdjointModel
G4VEmModel *	theDirectEMModel
G4VParticleChange *	pParticleChange
const G4String	name
G4int	ASelectedNucleus
G4int	ZSelectedNucleus
G4Material *	SelectedMaterial
G4double	kinEnergyProdForIntegration
G4double	kinEnergyScatProjForIntegration
G4double	kinEnergyProjForIntegration
std::vector< G4AdjointCSMatrix * > *	pOnCSMatrixForProdToProjBackwardScattering
std::vector< G4AdjointCSMatrix * > *	pOnCSMatrixForScatProjToProjBackwardScattering
std::vector< G4double >	CS_Vs_ElementForScatProjToProjCase
std::vector< G4double >	CS_Vs_ElementForProdToProjCase
G4double	lastCS
G4double	lastAdjointCSForScatProjToProjCase
G4double	lastAdjointCSForProdToProjCase
G4ParticleDefinition *	theAdjEquivOfDirectPrimPartDef
G4ParticleDefinition *	theAdjEquivOfDirectSecondPartDef
G4ParticleDefinition *	theDirectPrimaryPartDef
G4bool	second_part_of_same_type
G4double	preStepEnergy
G4Material *	currentMaterial
G4MaterialCutsCouple *	currentCouple
size_t	currentMaterialIndex
size_t	currentCoupleIndex
G4double	currentTcutForDirectPrim
G4double	currentTcutForDirectSecond
G4bool	ApplyCutInRange
G4double	mass_ratio_product
G4double	mass_ratio_projectile
G4double	HighEnergyLimit
G4double	LowEnergyLimit
G4double	CS_biasing_factor
G4bool	UseMatrix
G4bool	UseMatrixPerElement
G4bool	UseOnlyOneMatrixForAllElements
size_t	indexOfUsedCrossSectionMatrix
size_t	model_index
G4bool	correct_weight_for_post_step_in_model
G4double	additional_weight_correction_factor_for_post_step_outside_model

Detailed Description

Definition at line 71 of file G4AdjointIonIonisationModel.hh.

Constructor & Destructor Documentation

G4AdjointIonIonisationModel::G4AdjointIonIonisationModel

(

)

Definition at line 47 of file G4AdjointIonIonisationModel.cc.

                                                        :
  G4VEmAdjointModel("Adjoint_IonIonisation")
{ 


  UseMatrix =true;
  UseMatrixPerElement = true;
  ApplyCutInRange = true;
  UseOnlyOneMatrixForAllElements = true;
  CS_biasing_factor =1.;
  second_part_of_same_type =false;
  use_only_bragg = false; // for the Ion ionisation using the parametrised table model the cross sections and the sample of secondaries is done
                // as in the BraggIonModel, Therefore the use of this flag;  
  
  //The direct EM Model is taken has BetheBloch it is only used for the computation 
  // of the differential cross section.
  //The Bragg model could be used  as an alternative as  it offers the same differential cross section
  
  theBetheBlochDirectEMModel = new G4BetheBlochModel(G4GenericIon::GenericIon());
  theBraggIonDirectEMModel = new G4BraggIonModel(G4GenericIon::GenericIon()); 
  theAdjEquivOfDirectSecondPartDef=G4AdjointElectron::AdjointElectron();
  theDirectPrimaryPartDef =0;
  theAdjEquivOfDirectPrimPartDef =0;
 /* theDirectPrimaryPartDef =fwd_ion;
  theAdjEquivOfDirectPrimPartDef =adj_ion;
 
  DefineProjectileProperty();*/




}

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G4AdjointIonIonisationModel::~G4AdjointIonIonisationModel ( )

virtual

Definition at line 81 of file G4AdjointIonIonisationModel.cc.

{;}

Member Function Documentation

void G4AdjointIonIonisationModel::CorrectPostStepWeight ( G4ParticleChange *  fParticleChange, G4double  old_weight, G4double  adjointPrimKinEnergy, G4double  projectileKinEnergy, G4bool  IsScatProjToProjCase  )

virtual

Reimplemented from G4VEmAdjointModel.

Definition at line 266 of file G4AdjointIonIonisationModel.cc.

{
 //It is needed because the direct cross section used to compute the differential cross section is not the one used in 
 // the direct model where the GenericIon stuff is considered with correction of effective charge.  In the direct model the samnepl of secondaries does
 // not reflect the integral cross section. The integral fwd cross section that we used to compute the differential CS
 // match the sample of secondaries in the forward case despite the fact that its is not the same total CS than in the FWD case. For this reasion an extra
 // weight correction is needed at the end.
 

 G4double new_weight=old_weight;
 
 //the correction of CS due to the problem explained above
 G4double kinEnergyProjScaled = massRatio*projectileKinEnergy;
 theDirectEMModel =theBraggIonDirectEMModel;
 if (kinEnergyProjScaled >2.*MeV && !use_only_bragg) theDirectEMModel = theBetheBlochDirectEMModel; //Bethe Bloch Model
 G4double UsedFwdCS=theDirectEMModel->ComputeCrossSectionPerAtom(theDirectPrimaryPartDef,projectileKinEnergy,1,1 ,currentTcutForDirectSecond,1.e20);
 G4double chargeSqRatio =1.;
 if (chargeSquare>1.) chargeSqRatio =  theDirectEMModel->GetChargeSquareRatio(theDirectPrimaryPartDef,currentMaterial,projectileKinEnergy);
 G4double  CorrectFwdCS = chargeSqRatio*theDirectEMModel->ComputeCrossSectionPerAtom(G4GenericIon::GenericIon(),kinEnergyProjScaled,1,1 ,currentTcutForDirectSecond,1.e20);
 if (UsedFwdCS >0)  new_weight*= CorrectFwdCS/UsedFwdCS;//May be some check is needed if UsedFwdCS ==0 probably that then we should avoid a secondary to be produced, 
 
 
 //additional CS crorrection  needed for cross section biasing in general. 
 //May be wrong for ions!!! Most of the time not used!
  G4double w_corr =1./CS_biasing_factor;
  w_corr*=G4AdjointCSManager::GetAdjointCSManager()->GetPostStepWeightCorrection();
  new_weight*=w_corr;
 
  new_weight*=projectileKinEnergy/adjointPrimKinEnergy;
 
 fParticleChange->SetParentWeightByProcess(false);
 fParticleChange->SetSecondaryWeightByProcess(false);
 fParticleChange->ProposeParentWeight(new_weight);
}

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G4double G4AdjointIonIonisationModel::DiffCrossSectionPerAtomPrimToSecond ( G4double  kinEnergyProj, G4double  kinEnergyProd, G4double  Z, G4double  A = 0.  )

virtual

Reimplemented from G4VEmAdjointModel.

Definition at line 159 of file G4AdjointIonIonisationModel.cc.

{//Probably that here the Bragg Model should be also used for kinEnergyProj/nuc<2MeV
  

 
 G4double dSigmadEprod=0;
 G4double Emax_proj = GetSecondAdjEnergyMaxForProdToProjCase(kinEnergyProd);
 G4double Emin_proj = GetSecondAdjEnergyMinForProdToProjCase(kinEnergyProd);
 
 G4double kinEnergyProjScaled = massRatio*kinEnergyProj;
 
 
 if (kinEnergyProj>Emin_proj && kinEnergyProj<=Emax_proj){ //the produced particle should have a kinetic energy smaller than the projectile 
    G4double Tmax=kinEnergyProj;
    
        G4double E1=kinEnergyProd;
    G4double E2=kinEnergyProd*1.000001;
    G4double dE=(E2-E1);
    G4double sigma1,sigma2;
    theDirectEMModel =theBraggIonDirectEMModel;
    if (kinEnergyProjScaled >2.*MeV && !use_only_bragg) theDirectEMModel = theBetheBlochDirectEMModel; //Bethe Bloch Model
    sigma1=theDirectEMModel->ComputeCrossSectionPerAtom(theDirectPrimaryPartDef,kinEnergyProj,Z,A ,E1,1.e20);
    sigma2=theDirectEMModel->ComputeCrossSectionPerAtom(theDirectPrimaryPartDef,kinEnergyProj,Z,A ,E2,1.e20);
    
    dSigmadEprod=(sigma1-sigma2)/dE;
    
    //G4double chargeSqRatio =  currentModel->GetChargeSquareRatio(theDirectPrimaryPartDef,currentMaterial,E);
    
    
    
    if (dSigmadEprod>1.) {
        G4cout<<"sigma1 "<<kinEnergyProj/MeV<<'\t'<<kinEnergyProd/MeV<<'\t'<<sigma1<<G4endl;
        G4cout<<"sigma2 "<<kinEnergyProj/MeV<<'\t'<<kinEnergyProd/MeV<<'\t'<<sigma2<<G4endl;
        G4cout<<"dsigma "<<kinEnergyProj/MeV<<'\t'<<kinEnergyProd/MeV<<'\t'<<dSigmadEprod<<G4endl;
        
    }
    
     
    
     
     
     
     if (theDirectEMModel == theBetheBlochDirectEMModel ){
     //correction of differential cross section at high energy to correct for the suppression of particle at secondary at high
     //energy used in the Bethe Bloch Model. This correction consist to multiply by g the probability function used
     //to test the rejection of a secondary
     //-------------------------
     
     //Source code taken from    G4BetheBlochModel::SampleSecondaries
     
        G4double deltaKinEnergy = kinEnergyProd;
     
     //Part of the taken code
     //----------------------
     
     
     
     // projectile formfactor - suppresion of high energy
         // delta-electron production at high energy
     
     
        G4double x = formfact*deltaKinEnergy;
            if(x > 1.e-6) {
            G4double totEnergy     = kinEnergyProj + mass;
                G4double etot2         = totEnergy*totEnergy;
            G4double beta2 = kinEnergyProj*(kinEnergyProj + 2.0*mass)/etot2;
            G4double f;
            G4double f1 = 0.0;
            f = 1.0 - beta2*deltaKinEnergy/Tmax;
                if( 0.5 == spin ) {
                    f1 = 0.5*deltaKinEnergy*deltaKinEnergy/etot2;
                    f += f1;
                }
            G4double x1 = 1.0 + x;
                G4double gg  = 1.0/(x1*x1);
                if( 0.5 == spin ) {
                    G4double x2 = 0.5*electron_mass_c2*deltaKinEnergy/(mass*mass);
                    gg *= (1.0 + magMoment2*(x2 - f1/f)/(1.0 + x2));
                }
                if(gg > 1.0) {
                    G4cout << "### G4BetheBlochModel in Adjoint Sim WARNING: gg= " << gg
                    << G4endl;
                gg=1.;
            }
            //G4cout<<"gg"<<gg<<G4endl;
            dSigmadEprod*=gg;       
            }
    }   
     
  }

 return dSigmadEprod;   
}

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G4double G4AdjointIonIonisationModel::GetSecondAdjEnergyMaxForProdToProjCase ( G4double  PrimAdjEnergy )

virtual

Reimplemented from G4VEmAdjointModel.

Definition at line 356 of file G4AdjointIonIonisationModel.cc.

{ return HighEnergyLimit;
}

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G4double G4AdjointIonIonisationModel::GetSecondAdjEnergyMaxForScatProjToProjCase ( G4double  PrimAdjEnergy )

virtual

Reimplemented from G4VEmAdjointModel.

Definition at line 344 of file G4AdjointIonIonisationModel.cc.

{ 
  G4double Tmax=PrimAdjEnergy*one_plus_ratio_2/(one_minus_ratio_2-2.*ratio*PrimAdjEnergy/mass);
  return Tmax;
}

G4double G4AdjointIonIonisationModel::GetSecondAdjEnergyMinForProdToProjCase ( G4double  PrimAdjEnergy )

virtual

Reimplemented from G4VEmAdjointModel.

Definition at line 361 of file G4AdjointIonIonisationModel.cc.

{  G4double Tmin= (2*PrimAdjEnergy-4*mass + std::sqrt(4.*PrimAdjEnergy*PrimAdjEnergy +16.*mass*mass + 8.*PrimAdjEnergy*mass*(1/ratio +ratio)))/4.;
   return Tmin;
}

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G4double G4AdjointIonIonisationModel::GetSecondAdjEnergyMinForScatProjToProjCase ( G4double  PrimAdjEnergy, G4double  Tcut = 0  )

virtual

Reimplemented from G4VEmAdjointModel.

Definition at line 351 of file G4AdjointIonIonisationModel.cc.

{ return PrimAdjEnergy+Tcut;
}

void G4AdjointIonIonisationModel::SampleSecondaries ( const G4Track &  aTrack, G4bool  IsScatProjToProjCase, G4ParticleChange *  fParticleChange  )

virtual

Implements G4VEmAdjointModel.

Definition at line 85 of file G4AdjointIonIonisationModel.cc.

{ 
 const G4DynamicParticle* theAdjointPrimary =aTrack.GetDynamicParticle();
  
 //Elastic inverse scattering 
 //---------------------------------------------------------
 G4double adjointPrimKinEnergy = theAdjointPrimary->GetKineticEnergy();
 G4double adjointPrimP =theAdjointPrimary->GetTotalMomentum();

 if (adjointPrimKinEnergy>HighEnergyLimit*0.999){
    return;
 }
 
 //Sample secondary energy
 //-----------------------
 G4double projectileKinEnergy = SampleAdjSecEnergyFromCSMatrix(adjointPrimKinEnergy, IsScatProjToProjCase);
 CorrectPostStepWeight(fParticleChange, 
                  aTrack.GetWeight(), 
                  adjointPrimKinEnergy,
                  projectileKinEnergy,
                  IsScatProjToProjCase); //Caution !!!this weight correction should be always applied

         
 //Kinematic: 
 //we consider a two body elastic scattering for the forward processes where the projectile knock on an e- at rest  and gives
 // him part of its  energy
 //----------------------------------------------------------------------------------------
 
 G4double projectileM0 = theAdjEquivOfDirectPrimPartDef->GetPDGMass();
 G4double projectileTotalEnergy = projectileM0+projectileKinEnergy;
 G4double projectileP2 = projectileTotalEnergy*projectileTotalEnergy - projectileM0*projectileM0;   
 
 
 
 //Companion
 //-----------
 G4double companionM0 = theAdjEquivOfDirectPrimPartDef->GetPDGMass();
 if (IsScatProjToProjCase) {
    companionM0=theAdjEquivOfDirectSecondPartDef->GetPDGMass();
 } 
 G4double companionTotalEnergy =companionM0+ projectileKinEnergy-adjointPrimKinEnergy;
 G4double companionP2 = companionTotalEnergy*companionTotalEnergy - companionM0*companionM0;    
 
 
 //Projectile momentum
 //--------------------
 G4double  P_parallel = (adjointPrimP*adjointPrimP +  projectileP2 - companionP2)/(2.*adjointPrimP);
 G4double  P_perp = std::sqrt( projectileP2 -  P_parallel*P_parallel);
 G4ThreeVector dir_parallel=theAdjointPrimary->GetMomentumDirection();
 G4double phi =G4UniformRand()*2.*3.1415926;
 G4ThreeVector projectileMomentum = G4ThreeVector(P_perp*std::cos(phi),P_perp*std::sin(phi),P_parallel);
 projectileMomentum.rotateUz(dir_parallel);
 
 
 
 if (!IsScatProjToProjCase ){ //kill the primary and add a secondary
    fParticleChange->ProposeTrackStatus(fStopAndKill);
    fParticleChange->AddSecondary(new G4DynamicParticle(theAdjEquivOfDirectPrimPartDef,projectileMomentum));
    //G4cout<<"projectileMomentum "<<projectileMomentum<<G4endl;
 }
 else {
    fParticleChange->ProposeEnergy(projectileKinEnergy);
    fParticleChange->ProposeMomentumDirection(projectileMomentum.unit());
 }  
        

  

}

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void G4AdjointIonIonisationModel::SetIon	(	G4ParticleDefinition *	adj_ion,
		G4ParticleDefinition *	fwd_ion
	)

Definition at line 258 of file G4AdjointIonIonisationModel.cc.

{ theDirectPrimaryPartDef =fwd_ion;
  theAdjEquivOfDirectPrimPartDef =adj_ion;
 
  DefineProjectileProperty();
}

void G4AdjointIonIonisationModel::SetUseOnlyBragg ( G4bool  aBool )

inline

Definition at line 106 of file G4AdjointIonIonisationModel.hh.

{use_only_bragg =aBool;}

---

The documentation for this class was generated from the following files:

• geant4.10.03.p01/source/processes/electromagnetic/adjoint/include/G4AdjointIonIonisationModel.hh
• geant4.10.03.p01/source/processes/electromagnetic/adjoint/src/G4AdjointIonIonisationModel.cc