#include <G4HelixExplicitEuler.hh>

Inheritance diagram for G4HelixExplicitEuler:

Public Member Functions
	G4HelixExplicitEuler (G4Mag_EqRhs *EqRhs)

	~G4HelixExplicitEuler () override

void	Stepper (const G4double y[], const G4double *, G4double h, G4double yout[], G4double yerr[]) override

void	DumbStepper (const G4double y[], G4ThreeVector Bfld, G4double h, G4double yout[]) override

G4double	DistChord () const override

G4int	IntegratorOrder () const override

Public Member Functions inherited from G4MagHelicalStepper
	G4MagHelicalStepper (G4Mag_EqRhs *EqRhs)

	~G4MagHelicalStepper () override

	G4MagHelicalStepper (const G4MagHelicalStepper &)=delete

G4MagHelicalStepper &	operator= (const G4MagHelicalStepper &)=delete

void	Stepper (const G4double y[], const G4double dydx[], G4double h, G4double yout[], G4double yerr[]) override

G4double	DistChord () const override

Public Member Functions inherited from G4MagIntegratorStepper
	G4MagIntegratorStepper (G4EquationOfMotion *Equation, G4int numIntegrationVariables, G4int numStateVariables=12, G4bool isFSAL=false)

virtual	~G4MagIntegratorStepper ()=default

	G4MagIntegratorStepper (const G4MagIntegratorStepper &)=delete

G4MagIntegratorStepper &	operator= (const G4MagIntegratorStepper &)=delete

void	NormaliseTangentVector (G4double vec[6])

void	NormalisePolarizationVector (G4double vec[12])

void	RightHandSide (const G4double y[], G4double dydx[]) const

void	RightHandSide (const G4double y[], G4double dydx[], G4double field[]) const

G4int	GetNumberOfVariables () const

G4int	GetNumberOfStateVariables () const

G4int	IntegrationOrder ()

G4EquationOfMotion *	GetEquationOfMotion ()

const G4EquationOfMotion *	GetEquationOfMotion () const

void	SetEquationOfMotion (G4EquationOfMotion *newEquation)

unsigned long	GetfNoRHSCalls ()

void	ResetfNORHSCalls ()

G4bool	IsFSAL () const

G4bool	isQSS () const

void	SetIsQSS (G4bool val)

Additional Inherited Members
Protected Member Functions inherited from G4MagHelicalStepper
void	LinearStep (const G4double yIn[], G4double h, G4double yHelix[]) const

void	AdvanceHelix (const G4double yIn[], const G4ThreeVector &Bfld, G4double h, G4double yHelix[], G4double yHelix2[]=nullptr)

void	MagFieldEvaluate (const G4double y[], G4ThreeVector &Bfield)

G4double	GetInverseCurve (const G4double Momentum, const G4double Bmag)

void	SetAngCurve (const G4double Ang)

G4double	GetAngCurve () const

void	SetCurve (const G4double Curve)

G4double	GetCurve () const

void	SetRadHelix (const G4double Rad)

G4double	GetRadHelix () const

Protected Member Functions inherited from G4MagIntegratorStepper
void	SetIntegrationOrder (G4int order)

void	SetFSAL (G4bool flag=true)

Detailed Description

Definition at line 42 of file G4HelixExplicitEuler.hh.

Constructor & Destructor Documentation

◆ G4HelixExplicitEuler()

G4HelixExplicitEuler::G4HelixExplicitEuler ( G4Mag_EqRhs * EqRhs )

Definition at line 40 of file G4HelixExplicitEuler.cc.

  : G4MagHelicalStepper(EqRhs)
{
}

◆ ~G4HelixExplicitEuler()

G4HelixExplicitEuler::~G4HelixExplicitEuler ( )

overridedefault

Member Function Documentation

◆ DistChord()

G4double G4HelixExplicitEuler::DistChord ( ) const

overridevirtual

Implements G4MagIntegratorStepper.

Definition at line 87 of file G4HelixExplicitEuler.cc.

{
  // Implementation : must check whether h/R > 2 pi  !!
  //   If( h/R <  pi) use G4LineSection::DistLine
  //   Else           DistChord=R_helix
  //
  G4double distChord;
  G4double Ang_curve=GetAngCurve();
 
 
  if(Ang_curve<=pi)
  {
    distChord=GetRadHelix()*(1-std::cos(0.5*Ang_curve));
  }
  else if(Ang_curve<twopi)
  {
    distChord=GetRadHelix()*(1+std::cos(0.5*(twopi-Ang_curve)));
  }
  else
  {
    distChord=2.*GetRadHelix();  
  }
 
  return distChord;
}

◆ DumbStepper()

void G4HelixExplicitEuler::DumbStepper	(	const G4double	y[],
		G4ThreeVector	Bfld,
		G4double	h,
		G4double	yout[] )

overridevirtual

Implements G4MagHelicalStepper.

Definition at line 113 of file G4HelixExplicitEuler.cc.

{
   AdvanceHelix(yIn, Bfld, h, yOut);
}  

◆ IntegratorOrder()

G4int G4HelixExplicitEuler::IntegratorOrder ( ) const

inlineoverridevirtual

Implements G4MagIntegratorStepper.

Definition at line 62 of file G4HelixExplicitEuler.hh.

62{ return 1; }

◆ Stepper()

void G4HelixExplicitEuler::Stepper	(	const G4double	y[],
		const G4double *	,
		G4double	h,
		G4double	yout[],
		G4double	yerr[] )

override

Definition at line 47 of file G4HelixExplicitEuler.cc.

{
  // Estimation of the Stepping Angle
  //
  G4ThreeVector Bfld;
  MagFieldEvaluate(yInput, Bfld); 
  
  const G4int nvar = 6 ;
  G4double yTemp[8], yIn[8] ;
  G4ThreeVector  Bfld_midpoint;
 
  // Saving yInput because yInput and yOut can be aliases for same array
  //
  for(G4int i=0; i<nvar; ++i)
  {
    yIn[i] = yInput[i];
  }
     
  G4double h = Step * 0.5;
 
  // Do full step and two half steps
  //
  G4double yTemp2[7];
  AdvanceHelix(yIn, Bfld, h, yTemp2,yTemp);
  MagFieldEvaluate(yTemp2, Bfld_midpoint) ;     
  AdvanceHelix(yTemp2, Bfld_midpoint, h, yOut);
  SetAngCurve(GetAngCurve() * 2);
    
  // Error estimation
  //
  for(G4int i=0; i<nvar; ++i)
  {
    yErr[i] = yOut[i] - yTemp[i];
  }
}

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

Public Member Functions

Additional Inherited Members