ParabolicParametrizedMagneticField Class Reference

#include <ParabolicParametrizedMagneticField.h>

Inheritance diagram for ParabolicParametrizedMagneticField:

Public Member Functions
float	B0Z (const float a) const
GlobalVector	inTesla (const GlobalPoint &gp) const
	Field value ad specified global point, in Tesla. More...
GlobalVector	inTeslaUnchecked (const GlobalPoint &gp) const
bool	isDefined (const GlobalPoint &gp) const
	True if the point is within the region where the concrete field. More...
float	Kr (const float R2) const
	ParabolicParametrizedMagneticField ()
	Default constructor, use default values for 3.8T map. More...
	ParabolicParametrizedMagneticField (const std::vector< double > &parameters)
	Constructor with explicit parameter list (b0, b1, c1, a) More...
virtual	~ParabolicParametrizedMagneticField ()
	Destructor. More...
Public Member Functions inherited from MagneticField
virtual MagneticField *	clone () const
GlobalVector	inInverseGeV (const GlobalPoint &gp) const
	Field value ad specified global point, in 1/Gev. More...
GlobalVector	inKGauss (const GlobalPoint &gp) const
	Field value ad specified global point, in KGauss. More...
	MagneticField ()
	MagneticField (const MagneticField &orig)
int	nominalValue () const
	The nominal field value for this map in kGauss. More...
virtual	~MagneticField ()

Private Attributes
float	a
float	b0
float	b1
float	c1

Detailed Description

A simple parametrization of the Bz component in the tracker region using the product of two parabolas

Author

G. Ortona - Torino

Definition at line 17 of file ParabolicParametrizedMagneticField.h.

Constructor & Destructor Documentation

ParabolicParametrizedMagneticField::ParabolicParametrizedMagneticField ( )

explicit

Default constructor, use default values for 3.8T map.

Definition at line 14 of file ParabolicParametrizedMagneticField.cc.

                                                                       :
  c1(3.8114),
  b0(-3.94991e-06),
  b1(7.53701e-06),
  a (2.43878e-11)
{}

ParabolicParametrizedMagneticField::ParabolicParametrizedMagneticField ( const std::vector< double > &  parameters )

explicit

Constructor with explicit parameter list (b0, b1, c1, a)

Definition at line 22 of file ParabolicParametrizedMagneticField.cc.

                                                                                                       :
  c1(parameters[0]),
  b0(parameters[1]),
  b1(parameters[2]),
  a (parameters[3])
{}

ParabolicParametrizedMagneticField::~ParabolicParametrizedMagneticField ( )

virtual

Destructor.

Definition at line 30 of file ParabolicParametrizedMagneticField.cc.

{}

Member Function Documentation

float ParabolicParametrizedMagneticField::B0Z ( const float  a ) const

inline

Definition at line 47 of file ParabolicParametrizedMagneticField.cc.

References b0, b1, and c1.

Referenced by inTeslaUnchecked().

                                                                        {
  return b0*z*z + b1*z + c1;
}

GlobalVector ParabolicParametrizedMagneticField::inTesla ( const GlobalPoint &  gp ) const

virtual

Field value ad specified global point, in Tesla.

Implements MagneticField.

Definition at line 34 of file ParabolicParametrizedMagneticField.cc.

References inTeslaUnchecked(), isDefined(), and LogDebug.

                                                                       {
  if (isDefined(gp)) {
    return inTeslaUnchecked(gp);
  } else {
    LogDebug("MagneticField|FieldOutsideValidity") << " Point " << gp << " is outside the validity region of ParabolicParametrizedMagneticField";
    return GlobalVector();
  }
}

GlobalVector ParabolicParametrizedMagneticField::inTeslaUnchecked ( const GlobalPoint &  gp ) const

virtual

Optional implementation that derived classes can implement to provide faster query by skipping the check to isDefined.

Reimplemented from MagneticField.

Definition at line 43 of file ParabolicParametrizedMagneticField.cc.

References B0Z(), Kr(), PV3DBase< T, PVType, FrameType >::perp2(), and PV3DBase< T, PVType, FrameType >::z().

Referenced by inTesla().

                                                                                             {
  return GlobalVector(0, 0, B0Z(gp.z())*Kr(gp.perp2()));
}

bool ParabolicParametrizedMagneticField::isDefined ( const GlobalPoint &  ) const

inlinevirtual

True if the point is within the region where the concrete field.

Reimplemented from MagneticField.

Definition at line 55 of file ParabolicParametrizedMagneticField.cc.

References f, PV3DBase< T, PVType, FrameType >::perp2(), and PV3DBase< T, PVType, FrameType >::z().

Referenced by inTesla().

                                                                                     {
  return (gp.perp2()<(13225.f) && fabs(gp.z())<280.f);
}

float ParabolicParametrizedMagneticField::Kr ( const float  R2 ) const

inline

Definition at line 51 of file ParabolicParametrizedMagneticField.cc.

References a.

Referenced by inTeslaUnchecked().

                                                                        {
  return a*R2 +1.;
}

Member Data Documentation

float ParabolicParametrizedMagneticField::a

private

Definition at line 42 of file ParabolicParametrizedMagneticField.h.

Referenced by Kr().

float ParabolicParametrizedMagneticField::b0

private

Definition at line 40 of file ParabolicParametrizedMagneticField.h.

Referenced by B0Z().

float ParabolicParametrizedMagneticField::b1

private

Definition at line 41 of file ParabolicParametrizedMagneticField.h.

Referenced by B0Z().

float ParabolicParametrizedMagneticField::c1

private

Definition at line 39 of file ParabolicParametrizedMagneticField.h.

Referenced by B0Z().