G4ContinuousGainOfEnergy Class Reference

#include <G4ContinuousGainOfEnergy.hh>

Inheritance diagram for G4ContinuousGainOfEnergy:

Public Member Functions
	G4ContinuousGainOfEnergy (const G4String &name="EnergyGain", G4ProcessType type=fElectromagnetic)
virtual	~G4ContinuousGainOfEnergy ()
void	PreparePhysicsTable (const G4ParticleDefinition &)
void	BuildPhysicsTable (const G4ParticleDefinition &)
G4VParticleChange *	AlongStepDoIt (const G4Track &, const G4Step &)
void	SetLossFluctuations (G4bool val)
void	SetIsIntegral (G4bool val)
void	SetDirectEnergyLossProcess (G4VEnergyLossProcess *aProcess)
void	SetDirectParticle (G4ParticleDefinition *p)
Public Member Functions inherited from G4VContinuousProcess
	G4VContinuousProcess (const G4String &, G4ProcessType aType=fNotDefined)
	G4VContinuousProcess (G4VContinuousProcess &)
virtual	~G4VContinuousProcess ()
virtual G4double	AlongStepGetPhysicalInteractionLength (const G4Track &track, G4double previousStepSize, G4double currentMinimumStep, G4double &proposedSafety, G4GPILSelection *selection)
virtual G4VParticleChange *	AlongStepDoIt (const G4Track &, const G4Step &)
virtual G4double	PostStepGetPhysicalInteractionLength (const G4Track &, G4double, G4ForceCondition *)
virtual G4double	AtRestGetPhysicalInteractionLength (const G4Track &, G4ForceCondition *)
virtual G4VParticleChange *	AtRestDoIt (const G4Track &, const G4Step &)
virtual G4VParticleChange *	PostStepDoIt (const G4Track &, const G4Step &)
Public Member Functions inherited from G4VProcess
	G4VProcess (const G4String &aName="NoName", G4ProcessType aType=fNotDefined)
	G4VProcess (const G4VProcess &right)
virtual	~G4VProcess ()
G4int	operator== (const G4VProcess &right) const
G4int	operator!= (const G4VProcess &right) const
virtual G4VParticleChange *	PostStepDoIt (const G4Track &track, const G4Step &stepData)=0
virtual G4VParticleChange *	AlongStepDoIt (const G4Track &track, const G4Step &stepData)=0
virtual G4VParticleChange *	AtRestDoIt (const G4Track &track, const G4Step &stepData)=0
virtual G4double	AlongStepGetPhysicalInteractionLength (const G4Track &track, G4double previousStepSize, G4double currentMinimumStep, G4double &proposedSafety, G4GPILSelection *selection)=0
virtual G4double	AtRestGetPhysicalInteractionLength (const G4Track &track, G4ForceCondition *condition)=0
virtual G4double	PostStepGetPhysicalInteractionLength (const G4Track &track, G4double previousStepSize, G4ForceCondition *condition)=0
G4double	GetCurrentInteractionLength () const
void	SetPILfactor (G4double value)
G4double	GetPILfactor () const
G4double	AlongStepGPIL (const G4Track &track, G4double previousStepSize, G4double currentMinimumStep, G4double &proposedSafety, G4GPILSelection *selection)
G4double	AtRestGPIL (const G4Track &track, G4ForceCondition *condition)
G4double	PostStepGPIL (const G4Track &track, G4double previousStepSize, G4ForceCondition *condition)
virtual G4bool	IsApplicable (const G4ParticleDefinition &)
virtual void	BuildPhysicsTable (const G4ParticleDefinition &)
virtual void	PreparePhysicsTable (const G4ParticleDefinition &)
virtual G4bool	StorePhysicsTable (const G4ParticleDefinition *, const G4String &, G4bool)
virtual G4bool	RetrievePhysicsTable (const G4ParticleDefinition *, const G4String &, G4bool)
const G4String &	GetPhysicsTableFileName (const G4ParticleDefinition *, const G4String &directory, const G4String &tableName, G4bool ascii=false)
const G4String &	GetProcessName () const
G4ProcessType	GetProcessType () const
void	SetProcessType (G4ProcessType)
G4int	GetProcessSubType () const
void	SetProcessSubType (G4int)
virtual void	StartTracking (G4Track *)
virtual void	EndTracking ()
virtual void	SetProcessManager (const G4ProcessManager *)
virtual const G4ProcessManager *	GetProcessManager ()
virtual void	ResetNumberOfInteractionLengthLeft ()
G4double	GetNumberOfInteractionLengthLeft () const
G4double	GetTotalNumberOfInteractionLengthTraversed () const
G4bool	isAtRestDoItIsEnabled () const
G4bool	isAlongStepDoItIsEnabled () const
G4bool	isPostStepDoItIsEnabled () const
virtual void	DumpInfo () const
void	SetVerboseLevel (G4int value)
G4int	GetVerboseLevel () const

Protected Member Functions
virtual G4double	GetContinuousStepLimit (const G4Track &track, G4double previousStepSize, G4double currentMinimumStep, G4double &currentSafety)
Protected Member Functions inherited from G4VContinuousProcess
virtual G4double	GetContinuousStepLimit (const G4Track &aTrack, G4double previousStepSize, G4double currentMinimumStep, G4double &currentSafety)=0
void	SetGPILSelection (G4GPILSelection selection)
G4GPILSelection	GetGPILSelection () const
Protected Member Functions inherited from G4VProcess
void	SubtractNumberOfInteractionLengthLeft (G4double previousStepSize)
void	ClearNumberOfInteractionLengthLeft ()

Additional Inherited Members
Static Public Member Functions inherited from G4VProcess
static const G4String &	GetProcessTypeName (G4ProcessType)
Protected Attributes inherited from G4VProcess
const G4ProcessManager *	aProcessManager
G4VParticleChange *	pParticleChange
G4ParticleChange	aParticleChange
G4double	theNumberOfInteractionLengthLeft
G4double	currentInteractionLength
G4double	theInitialNumberOfInteractionLength
G4String	theProcessName
G4String	thePhysicsTableFileName
G4ProcessType	theProcessType
G4int	theProcessSubType
G4double	thePILfactor
G4bool	enableAtRestDoIt
G4bool	enableAlongStepDoIt
G4bool	enablePostStepDoIt
G4int	verboseLevel

Detailed Description

Definition at line 69 of file G4ContinuousGainOfEnergy.hh.

Constructor & Destructor Documentation

G4ContinuousGainOfEnergy()

G4ContinuousGainOfEnergy::G4ContinuousGainOfEnergy	(	const G4String &	name = "EnergyGain",
		G4ProcessType	type = fElectromagnetic
	)

Definition at line 44 of file G4ContinuousGainOfEnergy.cc.

                     : G4VContinuousProcess(name, type)
{
 
 
  linLossLimit=0.05;
  lossFluctuationArePossible =true;
  lossFluctuationFlag=true;
  is_integral = false;
  
  //Will be properly set in SetDirectParticle()
  IsIon=false;
  massRatio =1.;
  chargeSqRatio=1.;
  preStepChargeSqRatio=1.;
  
  //Some initialization
  currentCoupleIndex=9999999;
  currentCutInRange=0.;
  currentMaterialIndex=9999999;
  currentTcut=0.;
  preStepKinEnergy=0.;
  preStepRange=0.;
  preStepScaledKinEnergy=0.;
  
  currentCouple=0;  
}

~G4ContinuousGainOfEnergy()

G4ContinuousGainOfEnergy::~G4ContinuousGainOfEnergy ( )

virtual

Definition at line 74 of file G4ContinuousGainOfEnergy.cc.

{
 
}

Member Function Documentation

AlongStepDoIt()

G4VParticleChange * G4ContinuousGainOfEnergy::AlongStepDoIt ( const G4Track &  track, const G4Step &  step  )

virtual

Reimplemented from G4VContinuousProcess.

Definition at line 114 of file G4ContinuousGainOfEnergy.cc.

{
   
  //Caution in this method the  step length should be the true step length
  // A problem is that this is compute by the multiple scattering that does not know the energy at the end of the adjoint step. This energy is used during the 
  //Forward sim. Nothing we can really do against that at this time. This is inherent to the MS method
  //
  
  
  
  aParticleChange.Initialize(track);
  
  // Get the actual (true) Step length
  //----------------------------------
  G4double length = step.GetStepLength();
  G4double degain  = 0.0;
  
  
 
  // Compute this for weight change after continuous energy loss
  //-------------------------------------------------------------
  G4double DEDX_before = theDirectEnergyLossProcess->GetDEDX(preStepKinEnergy, currentCouple);
   
  
  
  // For the fluctuation we generate a new dynamic particle with energy =preEnergy+egain
  // and then compute the fluctuation given in  the direct case.
  //-----------------------------------------------------------------------
  G4DynamicParticle* dynParticle = new G4DynamicParticle();
  *dynParticle = *(track.GetDynamicParticle());
  dynParticle->SetDefinition(theDirectPartDef);
  G4double Tkin = dynParticle->GetKineticEnergy(); 
 
 
  size_t n=1;
  if (is_integral ) n=10;
  n=1;
  G4double dlength= length/n; 
  for (size_t i=0;i<n;i++) {
    if (Tkin != preStepKinEnergy && IsIon) {
        chargeSqRatio =  currentModel->GetChargeSquareRatio(theDirectPartDef,currentMaterial,Tkin);
        theDirectEnergyLossProcess->SetDynamicMassCharge(massRatio,chargeSqRatio); 
    
    }
  
    G4double r = theDirectEnergyLossProcess->GetRange(Tkin, currentCouple);
    if( dlength <= linLossLimit * r ) {
            degain = DEDX_before*dlength;       
    } 
    else {
            G4double x = r + dlength;
            //degain = theDirectEnergyLossProcess->GetKineticEnergy(x,currentCouple) - theDirectEnergyLossProcess->GetKineticEnergy(r,currentCouple);
        G4double E = theDirectEnergyLossProcess->GetKineticEnergy(x,currentCouple);
        if (IsIon){
            chargeSqRatio =  currentModel->GetChargeSquareRatio(theDirectPartDef,currentMaterial,E);
            theDirectEnergyLossProcess->SetDynamicMassCharge(massRatio,chargeSqRatio);
            G4double x1= theDirectEnergyLossProcess->GetRange(E, currentCouple);
            while (std::abs(x-x1)>0.01*x) {
                E = theDirectEnergyLossProcess->GetKineticEnergy(x,currentCouple);
                chargeSqRatio =  currentModel->GetChargeSquareRatio(theDirectPartDef,currentMaterial,E);
                theDirectEnergyLossProcess->SetDynamicMassCharge(massRatio,chargeSqRatio);
                x1= theDirectEnergyLossProcess->GetRange(E, currentCouple);
            
            } 
        }
        
        degain=E-Tkin;  
        
        
        
    }
    //G4cout<<degain<<G4endl;
    G4double tmax = currentModel->MaxSecondaryKinEnergy(dynParticle);
    tmax = std::min(tmax,currentTcut);
    
    
    dynParticle->SetKineticEnergy(Tkin+degain);
 
    // Corrections, which cannot be tabulated for ions
    //----------------------------------------
    G4double esecdep=0;//not used in most models
    currentModel->CorrectionsAlongStep(currentCouple, dynParticle, degain,esecdep, dlength); 
 
    // Sample fluctuations
    //-------------------
    
    
    G4double deltaE =0.;
    if (lossFluctuationFlag ) {
            deltaE = currentModel->GetModelOfFluctuations()->
                            SampleFluctuations(currentMaterial,dynParticle,tmax,dlength,degain)-degain;
    }
    
    G4double egain=degain+deltaE;
    if (egain <=0) egain=degain;
    Tkin+=egain;
    dynParticle->SetKineticEnergy(Tkin);
 }
 
 
  
 
  
  delete dynParticle;
 
  if (IsIon){
    chargeSqRatio =  currentModel->GetChargeSquareRatio(theDirectPartDef,currentMaterial,Tkin);
    theDirectEnergyLossProcess->SetDynamicMassCharge(massRatio,chargeSqRatio);
        
  }
  
  G4double DEDX_after = theDirectEnergyLossProcess->GetDEDX(Tkin, currentCouple);
  
  
  G4double weight_correction=DEDX_after/DEDX_before;
 
  
  aParticleChange.ProposeEnergy(Tkin);
 
 
  //Caution!!!
  // It is important  to select the weight of the post_step_point
  // as the current weight and not the weight of the track, as t
  // the  weight of the track is changed after having applied all
  // the along_step_do_it.
 
  // G4double new_weight=weight_correction*track.GetWeight(); //old
  G4double new_weight=weight_correction*step.GetPostStepPoint()->GetWeight();
  aParticleChange.SetParentWeightByProcess(false);
  aParticleChange.ProposeParentWeight(new_weight);
 
 
  return &aParticleChange;
 
}

BuildPhysicsTable()

void G4ContinuousGainOfEnergy::BuildPhysicsTable ( const G4ParticleDefinition &  )

virtual

Reimplemented from G4VProcess.

Definition at line 91 of file G4ContinuousGainOfEnergy.cc.

{//theDirectEnergyLossProcess->BuildPhysicsTable(part);
;
}

GetContinuousStepLimit()

G4double G4ContinuousGainOfEnergy::GetContinuousStepLimit ( const G4Track &  track, G4double  previousStepSize, G4double  currentMinimumStep, G4double &  currentSafety  )

protectedvirtual

Implements G4VContinuousProcess.

Definition at line 262 of file G4ContinuousGainOfEnergy.cc.

{ 
  G4double x = DBL_MAX;
  x=.1*mm;
 
 
  DefineMaterial(track.GetMaterialCutsCouple());
 
  preStepKinEnergy = track.GetKineticEnergy(); 
  preStepScaledKinEnergy = track.GetKineticEnergy()*massRatio;
  currentModel = theDirectEnergyLossProcess->SelectModelForMaterial(preStepScaledKinEnergy,currentCoupleIndex);
  G4double emax_model=currentModel->HighEnergyLimit();
  if (IsIon) {
    chargeSqRatio =  currentModel->GetChargeSquareRatio(theDirectPartDef,currentMaterial,preStepKinEnergy);
    preStepChargeSqRatio = chargeSqRatio;
    theDirectEnergyLossProcess->SetDynamicMassCharge(massRatio,preStepChargeSqRatio);
  } 
  
  
  G4double maxE =1.1*preStepKinEnergy;
  /*if (preStepKinEnergy< 0.05*MeV) maxE =2.*preStepKinEnergy;
  else if (preStepKinEnergy< 0.1*MeV) maxE =1.5*preStepKinEnergy;
  else if (preStepKinEnergy< 0.5*MeV) maxE =1.25*preStepKinEnergy;*/
   
  if (preStepKinEnergy < currentTcut) maxE = std::min(currentTcut,maxE);
 
  maxE=std::min(emax_model*1.001,maxE);
    
  preStepRange = theDirectEnergyLossProcess->GetRange(preStepKinEnergy, currentCouple);
  
  if (IsIon) {
    G4double chargeSqRatioAtEmax = currentModel->GetChargeSquareRatio(theDirectPartDef,currentMaterial,maxE);
    theDirectEnergyLossProcess->SetDynamicMassCharge(massRatio,chargeSqRatioAtEmax);
  } 
  
  G4double r1 = theDirectEnergyLossProcess->GetRange(maxE, currentCouple);
  
  if (IsIon) theDirectEnergyLossProcess->SetDynamicMassCharge(massRatio,preStepChargeSqRatio);
  
  
 
  x=r1-preStepRange;
  x=std::max(r1-preStepRange,0.001*mm);
 
  return x;
  
 
}

PreparePhysicsTable()

void G4ContinuousGainOfEnergy::PreparePhysicsTable ( const G4ParticleDefinition &  )

virtual

Reimplemented from G4VProcess.

Definition at line 81 of file G4ContinuousGainOfEnergy.cc.

{//theDirectEnergyLossProcess->PreparePhysicsTable(part);
 
; 
}

SetDirectEnergyLossProcess()

void G4ContinuousGainOfEnergy::SetDirectEnergyLossProcess ( G4VEnergyLossProcess *  aProcess )

inline

Definition at line 112 of file G4ContinuousGainOfEnergy.hh.

{theDirectEnergyLossProcess=aProcess;};  

SetDirectParticle()

void G4ContinuousGainOfEnergy::SetDirectParticle

(

G4ParticleDefinition *

p

)

Definition at line 98 of file G4ContinuousGainOfEnergy.cc.

{theDirectPartDef=p;
 if (theDirectPartDef->GetParticleType()== "nucleus") {
     IsIon=true;
     massRatio = proton_mass_c2/theDirectPartDef->GetPDGMass();
     G4double q=theDirectPartDef->GetPDGCharge();
     chargeSqRatio=q*q;
    
     
 }
 
}

SetIsIntegral()

void G4ContinuousGainOfEnergy::SetIsIntegral ( G4bool  val )

inline

Definition at line 110 of file G4ContinuousGainOfEnergy.hh.

{is_integral= val;}

SetLossFluctuations()

void G4ContinuousGainOfEnergy::SetLossFluctuations

(

G4bool

val

)

Definition at line 252 of file G4ContinuousGainOfEnergy.cc.

{
  if(val && !lossFluctuationArePossible) return;
  lossFluctuationFlag = val;
}

---

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

• G4ContinuousGainOfEnergy.hh
• G4ContinuousGainOfEnergy.cc