#include <G4PAIModel.hh>

Inheritance diagram for G4PAIModel:

Public Member Functions
	G4PAIModel (const G4ParticleDefinition *p=0, const G4String &nam="PAI")

virtual	~G4PAIModel ()

virtual void	Initialise (const G4ParticleDefinition *, const G4DataVector &)

virtual void	InitialiseLocal (const G4ParticleDefinition , G4VEmModel masterModel)

virtual G4double	ComputeDEDXPerVolume (const G4Material , const G4ParticleDefinition , G4double kineticEnergy, G4double cutEnergy)

virtual G4double	CrossSectionPerVolume (const G4Material , const G4ParticleDefinition , G4double kineticEnergy, G4double cutEnergy, G4double maxEnergy)

virtual void	SampleSecondaries (std::vector< G4DynamicParticle * > , const G4MaterialCutsCouple , const G4DynamicParticle *, G4double tmin, G4double maxEnergy)

virtual G4double	SampleFluctuations (const G4MaterialCutsCouple , const G4DynamicParticle , G4double, G4double, G4double)

virtual G4double	Dispersion (const G4Material , const G4DynamicParticle , G4double, G4double)

void	DefineForRegion (const G4Region *r)

G4PAIModelData *	GetPAIModelData ()

G4double	ComputeMaxEnergy (G4double scaledEnergy)

void	SetVerboseLevel (G4int verbose)

Public Member Functions inherited from G4VEmModel
	G4VEmModel (const G4String &nam)

virtual	~G4VEmModel ()

virtual void	InitialiseForMaterial (const G4ParticleDefinition , const G4Material )

virtual void	InitialiseForElement (const G4ParticleDefinition *, G4int Z)

virtual G4double	ComputeCrossSectionPerAtom (const G4ParticleDefinition *, G4double kinEnergy, G4double Z, G4double A=0., G4double cutEnergy=0.0, G4double maxEnergy=DBL_MAX)

virtual G4double	ChargeSquareRatio (const G4Track &)

virtual G4double	GetChargeSquareRatio (const G4ParticleDefinition , const G4Material , G4double kineticEnergy)

virtual G4double	GetParticleCharge (const G4ParticleDefinition , const G4Material , G4double kineticEnergy)

virtual void	StartTracking (G4Track *)

virtual void	CorrectionsAlongStep (const G4MaterialCutsCouple , const G4DynamicParticle , G4double &eloss, G4double &niel, G4double length)

virtual G4double	Value (const G4MaterialCutsCouple , const G4ParticleDefinition , G4double kineticEnergy)

virtual G4double	MinPrimaryEnergy (const G4Material , const G4ParticleDefinition , G4double cut=0.0)

virtual G4double	MinEnergyCut (const G4ParticleDefinition , const G4MaterialCutsCouple )

virtual void	SetupForMaterial (const G4ParticleDefinition , const G4Material , G4double kineticEnergy)

void	InitialiseElementSelectors (const G4ParticleDefinition *, const G4DataVector &)

std::vector < G4EmElementSelector * > *	GetElementSelectors ()

void	SetElementSelectors (std::vector< G4EmElementSelector * > *)

G4double	ComputeDEDX (const G4MaterialCutsCouple , const G4ParticleDefinition , G4double kineticEnergy, G4double cutEnergy=DBL_MAX)

G4double	CrossSection (const G4MaterialCutsCouple , const G4ParticleDefinition , G4double kineticEnergy, G4double cutEnergy=0.0, G4double maxEnergy=DBL_MAX)

G4double	ComputeMeanFreePath (const G4ParticleDefinition , G4double kineticEnergy, const G4Material , G4double cutEnergy=0.0, G4double maxEnergy=DBL_MAX)

G4double	ComputeCrossSectionPerAtom (const G4ParticleDefinition , const G4Element , G4double kinEnergy, G4double cutEnergy=0.0, G4double maxEnergy=DBL_MAX)

G4int	SelectIsotopeNumber (const G4Element *)

const G4Element *	SelectRandomAtom (const G4MaterialCutsCouple , const G4ParticleDefinition , G4double kineticEnergy, G4double cutEnergy=0.0, G4double maxEnergy=DBL_MAX)

const G4Element *	SelectRandomAtom (const G4Material , const G4ParticleDefinition , G4double kineticEnergy, G4double cutEnergy=0.0, G4double maxEnergy=DBL_MAX)

G4int	SelectRandomAtomNumber (const G4Material *)

void	SetParticleChange (G4VParticleChange , G4VEmFluctuationModel f=0)

void	SetCrossSectionTable (G4PhysicsTable *, G4bool isLocal)

G4ElementData *	GetElementData ()

G4PhysicsTable *	GetCrossSectionTable ()

G4VEmFluctuationModel *	GetModelOfFluctuations ()

G4VEmAngularDistribution *	GetAngularDistribution ()

void	SetAngularDistribution (G4VEmAngularDistribution *)

G4double	HighEnergyLimit () const

G4double	LowEnergyLimit () const

G4double	HighEnergyActivationLimit () const

G4double	LowEnergyActivationLimit () const

G4double	PolarAngleLimit () const

G4double	SecondaryThreshold () const

G4bool	LPMFlag () const

G4bool	DeexcitationFlag () const

G4bool	ForceBuildTableFlag () const

G4bool	UseAngularGeneratorFlag () const

void	SetAngularGeneratorFlag (G4bool)

void	SetHighEnergyLimit (G4double)

void	SetLowEnergyLimit (G4double)

void	SetActivationHighEnergyLimit (G4double)

void	SetActivationLowEnergyLimit (G4double)

G4bool	IsActive (G4double kinEnergy)

void	SetPolarAngleLimit (G4double)

void	SetSecondaryThreshold (G4double)

void	SetLPMFlag (G4bool val)

void	SetDeexcitationFlag (G4bool val)

void	SetForceBuildTable (G4bool val)

void	SetMasterThread (G4bool val)

G4bool	IsMaster () const

G4double	MaxSecondaryKinEnergy (const G4DynamicParticle *dynParticle)

const G4String &	GetName () const

void	SetCurrentCouple (const G4MaterialCutsCouple *)

const G4Element *	GetCurrentElement () const

Public Member Functions inherited from G4VEmFluctuationModel
	G4VEmFluctuationModel (const G4String &nam)

virtual	~G4VEmFluctuationModel ()

virtual void	InitialiseMe (const G4ParticleDefinition *)

virtual void	SetParticleAndCharge (const G4ParticleDefinition *, G4double q2)

G4String	GetName () const

Protected Member Functions
G4double	MaxSecondaryEnergy (const G4ParticleDefinition *, G4double kinEnergy)

Protected Member Functions inherited from G4VEmModel
G4ParticleChangeForLoss *	GetParticleChangeForLoss ()

G4ParticleChangeForGamma *	GetParticleChangeForGamma ()

const G4MaterialCutsCouple *	CurrentCouple () const

void	SetCurrentElement (const G4Element *)

Additional Inherited Members
Protected Attributes inherited from G4VEmModel
G4ElementData *	fElementData

G4VParticleChange *	pParticleChange

G4PhysicsTable *	xSectionTable

const std::vector< G4double > *	theDensityFactor

const std::vector< G4int > *	theDensityIdx

size_t	idxTable

Detailed Description

Definition at line 69 of file G4PAIModel.hh.

Constructor & Destructor Documentation

G4PAIModel::G4PAIModel	(	const G4ParticleDefinition *	p = `0`,
		const G4String &	nam = `"PAI"`
	)

Definition at line 82 of file G4PAIModel.cc.

References G4Electron::Electron(), G4Positron::Positron(), and G4VEmModel::SetAngularDistribution().

   : G4VEmModel(nam),G4VEmFluctuationModel(nam),
     fVerbose(0),
     fModelData(0),
     fParticle(0)
 {  
   fElectron = G4Electron::Electron();
   fPositron = G4Positron::Positron();
 
   fParticleChange = 0;
 
   if(p) { SetParticle(p); }
   else  { SetParticle(fElectron); }
 
   // default generator
   SetAngularDistribution(new G4DeltaAngle());
 
   isInitialised = false;
 }

G4PAIModel::~G4PAIModel ( )

virtual

Definition at line 104 of file G4PAIModel.cc.

References G4VEmModel::IsMaster().

 {
   if(IsMaster()) { delete fModelData; }
 }

Member Function Documentation

G4double G4PAIModel::ComputeDEDXPerVolume	(	const G4Material *	,
		const G4ParticleDefinition *	p,
		G4double	kineticEnergy,
		G4double	cutEnergy
	)

virtual

Reimplemented from G4VEmModel.

Definition at line 185 of file G4PAIModel.cc.

References G4VEmModel::CurrentCouple(), G4PAIModelData::DEDXPerVolume(), MaxSecondaryEnergy(), and G4INCL::Math::min().

 {
   G4int coupleIndex = FindCoupleIndex(CurrentCouple());
   if(0 > coupleIndex) { return 0.0; }
 
   G4double cut = std::min(MaxSecondaryEnergy(p, kineticEnergy), cutEnergy);
 
   G4double scaledTkin = kineticEnergy*fRatio;
  
   return fChargeSquare*fModelData->DEDXPerVolume(coupleIndex, scaledTkin, cut);
 }

G4double G4PAIModel::ComputeMaxEnergy ( G4double scaledEnergy )

inline

Definition at line 158 of file G4PAIModel.hh.

References MaxSecondaryEnergy().

Referenced by G4PAIModelData::Initialise().

 {
   return MaxSecondaryEnergy(fParticle, scaledEnergy/fRatio);
 }

G4double G4PAIModel::CrossSectionPerVolume	(	const G4Material *	,
		const G4ParticleDefinition *	p,
		G4double	kineticEnergy,
		G4double	cutEnergy,
		G4double	maxEnergy
	)

virtual

Reimplemented from G4VEmModel.

Definition at line 202 of file G4PAIModel.cc.

References G4PAIModelData::CrossSectionPerVolume(), G4VEmModel::CurrentCouple(), MaxSecondaryEnergy(), and G4INCL::Math::min().

 {
   G4int coupleIndex = FindCoupleIndex(CurrentCouple());
   if(0 > coupleIndex) { return 0.0; }
 
   G4double tmax = std::min(MaxSecondaryEnergy(p, kineticEnergy), maxEnergy);
   if(tmax <= cutEnergy) { return 0.0; }
 
   G4double scaledTkin = kineticEnergy*fRatio;
 
   return fChargeSquare*fModelData->CrossSectionPerVolume(coupleIndex, 
                              scaledTkin, 
                              cutEnergy, tmax);
 }

void G4PAIModel::DefineForRegion ( const G4Region * r )

virtual

Reimplemented from G4VEmModel.

Definition at line 364 of file G4PAIModel.cc.

 {
   fPAIRegionVector.push_back(r);
 }

G4double G4PAIModel::Dispersion	(	const G4Material *	material,
		const G4DynamicParticle *	aParticle,
		G4double	tmax,
		G4double	step
	)

virtual

Implements G4VEmFluctuationModel.

Definition at line 316 of file G4PAIModel.cc.

References python.hepunit::eplus, G4DynamicParticle::GetCharge(), G4Material::GetElectronDensity(), G4DynamicParticle::GetKineticEnergy(), G4DynamicParticle::GetMass(), and python.hepunit::twopi_mc2_rcl2.

 {
   G4double particleMass  = aParticle->GetMass();
   G4double electronDensity = material->GetElectronDensity();
   G4double kineticEnergy = aParticle->GetKineticEnergy();
   G4double q = aParticle->GetCharge()/eplus;
   G4double etot = kineticEnergy + particleMass;
   G4double beta2 = kineticEnergy*(kineticEnergy + 2.0*particleMass)/(etot*etot);
   G4double siga  = (1.0/beta2 - 0.5) * twopi_mc2_rcl2 * tmax * step
                  * electronDensity * q * q;
 
   return siga;
   /*
   G4double loss, sumLoss=0., sumLoss2=0., sigma2, meanLoss=0.;
   for(G4int i = 0; i < fMeanNumber; i++)
   {
     loss      = SampleFluctuations(material,aParticle,tmax,step,meanLoss);
     sumLoss  += loss;
     sumLoss2 += loss*loss;
   }
   meanLoss = sumLoss/fMeanNumber;
   sigma2   = meanLoss*meanLoss + (sumLoss2-2*sumLoss*meanLoss)/fMeanNumber;
   return sigma2;
   */
 }

G4PAIModelData * G4PAIModel::GetPAIModelData ( )

inline

Definition at line 153 of file G4PAIModel.hh.

Referenced by InitialiseLocal().

 {
   return fModelData;
 }

void G4PAIModel::Initialise	(	const G4ParticleDefinition *	p,
		const G4DataVector &	cuts
	)

virtual

Implements G4VEmModel.

Definition at line 111 of file G4PAIModel.cc.

References G4Region::FindCouple(), G4cout, G4endl, G4MaterialCutsCouple::GetIndex(), G4Material::GetMaterialTable(), G4Material::GetNumberOfMaterials(), G4VEmModel::GetParticleChangeForLoss(), G4ParticleDefinition::GetParticleName(), G4VEmModel::HighEnergyLimit(), G4PAIModelData::Initialise(), G4VEmModel::InitialiseElementSelectors(), G4VEmModel::IsMaster(), G4VEmModel::LowEnergyLimit(), and n.

 {
   if(fVerbose > 0) {
     G4cout<<"G4PAIModel::Initialise for "<<p->GetParticleName()<<G4endl;
   }
 
   if(isInitialised) { return; }
   isInitialised = true;
 
   SetParticle(p);
   fParticleChange = GetParticleChangeForLoss();
 
   if(IsMaster()) { 
 
     InitialiseElementSelectors(p, cuts);
 
     if(!fModelData) {
 
       G4double tmin = LowEnergyLimit()*fRatio;
       G4double tmax = HighEnergyLimit()*fRatio;
       fModelData = new G4PAIModelData(tmin, tmax, fVerbose);
     }
     // Prepare initialization
     const G4MaterialTable* theMaterialTable = G4Material::GetMaterialTable();
     size_t numOfMat   = G4Material::GetNumberOfMaterials();
     size_t numRegions = fPAIRegionVector.size();
 
     for(size_t iReg = 0; iReg < numRegions; ++iReg) {
       const G4Region* curReg = fPAIRegionVector[iReg];
       G4Region* reg = const_cast<G4Region*>(curReg);
 
       for(size_t jMat = 0; jMat < numOfMat; ++jMat) {
     G4Material* mat = (*theMaterialTable)[jMat];
     const G4MaterialCutsCouple* cutCouple = reg->FindCouple(mat);
     //G4cout << "Couple <" << fCutCouple << G4endl;
     if(cutCouple) {
       /*
         G4cout << "Reg <" <<curReg->GetName() << ">  mat <" 
         << fMaterial->GetName() << ">  fCouple= " 
         << fCutCouple << " idx= " << fCutCouple->GetIndex()
         <<"  " << p->GetParticleName() <<G4endl;
         // G4cout << cuts.size() << G4endl;
         */
       // check if this couple is not already initialized
       size_t n = fMaterialCutsCoupleVector.size();
       if(0 < n) {
         for(size_t i=0; i<fMaterialCutsCoupleVector.size(); ++i) {
           if(cutCouple == fMaterialCutsCoupleVector[i]) {
         break;
           }
         }
       }
       // initialise data banks
       fMaterialCutsCoupleVector.push_back(cutCouple);
       G4double deltaCutInKinEnergy = cuts[cutCouple->GetIndex()];
       fModelData->Initialise(cutCouple, deltaCutInKinEnergy, this);
     }
       }
     }
   }
 }

void G4PAIModel::InitialiseLocal	(	const G4ParticleDefinition *	,
		G4VEmModel *	masterModel
	)

virtual

Reimplemented from G4VEmModel.

Definition at line 176 of file G4PAIModel.cc.

References G4VEmModel::GetElementSelectors(), GetPAIModelData(), and G4VEmModel::SetElementSelectors().

 {
   fModelData = static_cast<G4PAIModel*>(masterModel)->GetPAIModelData();
   SetElementSelectors(masterModel->GetElementSelectors());
 }

G4double G4PAIModel::MaxSecondaryEnergy	(	const G4ParticleDefinition *	p,
		G4double	kinEnergy
	)

protectedvirtual

Reimplemented from G4VEmModel.

Definition at line 347 of file G4PAIModel.cc.

References python.hepunit::electron_mass_c2.

Referenced by ComputeDEDXPerVolume(), ComputeMaxEnergy(), CrossSectionPerVolume(), and SampleSecondaries().

 {
   SetParticle(p);
   G4double tmax = kinEnergy;
   if(p == fElectron) { tmax *= 0.5; }
   else if(p != fPositron) { 
     G4double ratio= electron_mass_c2/fMass;
     G4double gamma= kinEnergy/fMass + 1.0;
     tmax = 2.0*electron_mass_c2*(gamma*gamma - 1.) /
                   (1. + 2.0*gamma*ratio + ratio*ratio);
   }
   return tmax;
 }

G4double G4PAIModel::SampleFluctuations	(	const G4MaterialCutsCouple *	matCC,
		const G4DynamicParticle *	aParticle,
		G4double	,
		G4double	step,
		G4double	eloss
	)

virtual

Implements G4VEmFluctuationModel.

Definition at line 281 of file G4PAIModel.cc.

References G4DynamicParticle::GetDefinition(), G4DynamicParticle::GetKineticEnergy(), and G4PAIModelData::SampleAlongStepTransfer().

 {
   G4int coupleIndex = FindCoupleIndex(matCC);
   if(0 > coupleIndex) { return eloss; }
 
   SetParticle(aParticle->GetDefinition());
 
   /*
   G4cout << "G4PAIModel::SampleFluctuations step(mm)= "<< step/mm
      << "  Eloss(keV)= " << eloss/keV  << " in " 
      << matCC->Getmaterial()->GetName() << G4endl;
   */
 
   G4double Tkin       = aParticle->GetKineticEnergy();
   G4double scaledTkin = Tkin*fRatio;
 
   G4double loss = fModelData->SampleAlongStepTransfer(coupleIndex, Tkin,
                               scaledTkin,
                               step*fChargeSquare);
   
   // G4cout<<"PAIModel AlongStepLoss = "<<loss/keV<<" keV, on step = "
   //<<step/mm<<" mm"<<G4endl; 
   return loss;
 
 }

void G4PAIModel::SampleSecondaries	(	std::vector< G4DynamicParticle * > *	vdp,
		const G4MaterialCutsCouple *	matCC,
		const G4DynamicParticle *	dp,
		G4double	tmin,
		G4double	maxEnergy
	)

virtual

Implements G4VEmModel.

Definition at line 226 of file G4PAIModel.cc.

References G4cout, G4endl, G4lrint(), G4VEmModel::GetAngularDistribution(), G4DynamicParticle::GetDefinition(), G4DynamicParticle::GetKineticEnergy(), G4MaterialCutsCouple::GetMaterial(), G4DynamicParticle::GetMomentumDirection(), G4Element::GetZ(), MaxSecondaryEnergy(), G4PAIModelData::SamplePostStepTransfer(), G4VEmModel::SelectRandomAtom(), G4ParticleChangeForLoss::SetProposedKineticEnergy(), G4ParticleChangeForLoss::SetProposedMomentumDirection(), and CLHEP::Hep3Vector::unit().

 {
   G4int coupleIndex = FindCoupleIndex(matCC);
   if(0 > coupleIndex) { return; }
 
   SetParticle(dp->GetDefinition());
   G4double kineticEnergy = dp->GetKineticEnergy();
 
   G4double tmax = MaxSecondaryEnergy(fParticle, kineticEnergy);
   if(maxEnergy < tmax) { tmax = maxEnergy; }
   if(tmin >= tmax) { return; }
 
   G4ThreeVector direction= dp->GetMomentumDirection();
   G4double scaledTkin    = kineticEnergy*fRatio;
   G4double totalEnergy   = kineticEnergy + fMass;
   G4double totalMomentum = sqrt(kineticEnergy*(totalEnergy+fMass));
 
   G4double deltaTkin = 
     fModelData->SamplePostStepTransfer(coupleIndex, scaledTkin);
 
   // G4cout<<"G4PAIModel::SampleSecondaries; deltaKIn = "<<deltaTkin/keV
   // <<" keV "<<G4endl;
 
   if( deltaTkin <= 0. && fVerbose > 0) 
   {
     G4cout<<"G4PAIModel::SampleSecondary e- deltaTkin = "<<deltaTkin<<G4endl;
   }
   if( deltaTkin <= 0.) { return; }
 
   if( deltaTkin > tmax) { deltaTkin = tmax; }
 
   const G4Element* anElement = SelectRandomAtom(matCC,fParticle,kineticEnergy);
   G4int Z = G4lrint(anElement->GetZ());
  
   G4DynamicParticle* deltaRay = new G4DynamicParticle(fElectron, 
         GetAngularDistribution()->SampleDirection(dp, deltaTkin,
                               Z, matCC->GetMaterial()),
                               deltaTkin);
 
   // primary change
   kineticEnergy -= deltaTkin;
   G4ThreeVector dir = totalMomentum*direction - deltaRay->GetMomentum();
   direction = dir.unit();
   fParticleChange->SetProposedKineticEnergy(kineticEnergy);
   fParticleChange->SetProposedMomentumDirection(direction);
 
   vdp->push_back(deltaRay);
 }

void G4PAIModel::SetVerboseLevel ( G4int verbose )

inline

Definition at line 163 of file G4PAIModel.hh.

 { 
   fVerbose=verbose; 
 }

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

Public Member Functions

Protected Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation