G4ErrorMag_UsualEqRhs Class Reference

#include <G4ErrorMag_UsualEqRhs.hh>

Inheritance diagram for G4ErrorMag_UsualEqRhs:

Public Member Functions
	G4ErrorMag_UsualEqRhs (G4MagneticField *MagField)
	~G4ErrorMag_UsualEqRhs ()
void	EvaluateRhsGivenB (const G4double y[], const G4double B[3], G4double dydx[]) const

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Detailed Description

Definition at line 49 of file G4ErrorMag_UsualEqRhs.hh.

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Constructor & Destructor Documentation

G4ErrorMag_UsualEqRhs::G4ErrorMag_UsualEqRhs

(

G4MagneticField *

MagField

)

Definition at line 39 of file G4ErrorMag_UsualEqRhs.cc.

  : G4Mag_UsualEqRhs( MagField )
{
}

G4ErrorMag_UsualEqRhs::~G4ErrorMag_UsualEqRhs

(

)

Definition at line 44 of file G4ErrorMag_UsualEqRhs.cc.

{
}

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Member Function Documentation

void G4ErrorMag_UsualEqRhs::EvaluateRhsGivenB	(	const G4double	y[],
		const G4double	B[3],
		G4double	dydx[]
	)			const [virtual]

Reimplemented from G4Mag_UsualEqRhs.

Definition at line 50 of file G4ErrorMag_UsualEqRhs.cc.

References G4Mag_UsualEqRhs::EvaluateRhsGivenB(), G4Mag_EqRhs::FCof(), G4ErrorMode_PropBackwards, G4ErrorPropagatorData::GetErrorPropagatorData(), and sqr().

{

  G4Mag_UsualEqRhs::EvaluateRhsGivenB(y, B, dydx );
  
  if(G4ErrorPropagatorData::GetErrorPropagatorData()->GetMode()
     == G4ErrorMode_PropBackwards)
  {
    G4double momentum_mag_square = sqr(y[3]) + sqr(y[4]) + sqr(y[5]);
    G4double inv_momentum_magnitude = 1.0 / std::sqrt( momentum_mag_square );
    
    G4double cof = FCof()*inv_momentum_magnitude;

    dydx[3] = cof*(y[4]*(-B[2]) - y[5]*(-B[1])) ;
    dydx[4] = cof*(y[5]*(-B[0]) - y[3]*(-B[2])) ;
    dydx[5] = cof*(y[3]*(-B[1]) - y[4]*(-B[0])) ;    
  }
  return;
}

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

• G4ErrorMag_UsualEqRhs.hh
• G4ErrorMag_UsualEqRhs.cc

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