VertexFitBField Class Reference

#include <BField.h>

Public Member Functions
	~VertexFitBField ()
double	getBFieldZ (const HepPoint3D &vtx)
double	getBFieldZRef ()
double	getCBz (const HepVector &vtx, const HepVector &trackPosition)

Static Public Member Functions
static VertexFitBField *	instance ()

Detailed Description

Definition at line 22 of file Analysis/VertexFit/VertexFit-00-02-74/VertexFit/BField.h.

Constructor & Destructor Documentation

~VertexFitBField()

VertexFitBField::~VertexFitBField ( )

inline

Definition at line 31 of file Analysis/VertexFit/VertexFit-00-02-74/VertexFit/BField.h.

{}

Member Function Documentation

getBFieldZ()

double VertexFitBField::getBFieldZ

(

const HepPoint3D &

vtx

)

Definition at line 47 of file Analysis/VertexFit/VertexFit-00-02-74/src/BField.cxx.

                                                        {
  HepVector3D vector(0.0, 0.0, 0.0);
  // fixed 2008-8-1
  double radius = sqrt(vtx.x()*vtx.x() + vtx.y()*vtx.y());
  if (radius < 150 && abs(vtx.z()) < 150) {
    m_pIMF->fieldVector(10.0*vtx, vector);
    return 1000 * vector.z();   //unit of m_BFieldZ is Tesla
  } else {
    return 1000 * m_pIMF->getReferField(); 
  }  
}

Referenced by HTrackParameter::center(), HTrackParameter::dHdp(), HTrackParameter::dHdx(), HTrackParameter::HTrackParameter(), HTrackParameter::positionTwoHelix(), and HTrackParameter::radius().

getBFieldZRef()

double VertexFitBField::getBFieldZRef

(

)

Definition at line 59 of file Analysis/VertexFit/VertexFit-00-02-74/src/BField.cxx.

                                      {
  return 1000 * m_pIMF->getReferField();
}

Referenced by FastVertexFit::addTrack(), and VFHelix::VFHelix().

getCBz()

double VertexFitBField::getCBz	(	const HepVector &	vtx,
		const HepVector &	trackPosition
	)

Definition at line 63 of file Analysis/VertexFit/VertexFit-00-02-74/src/BField.cxx.

                                                                                   {
  HepPoint3D Vtx(vtx[0], vtx[1], vtx[2]);
  HepPoint3D TrkPosition(trackPosition[0], trackPosition[1], trackPosition[2]);
 
  HepVector3D vector_vtx(0.0, 0.0, 0.0);
  HepVector3D vector_trk(0.0, 0.0, 0.0);
  double radius = sqrt(vtx[0]*vtx[0] + vtx[1]*vtx[1]);
  if (radius < 150 && abs(vtx[2]) < 150) {
    m_pIMF->fieldVector(10.0*Vtx, vector_vtx);
    m_pIMF->fieldVector(10.0*TrkPosition, vector_trk);
    return 1000 * alpha * (vector_vtx.z() + vector_trk.z())/2;//unit of m_BFieldZ is Tesla
  } else {
    return 1000 * alpha* m_pIMF->getReferField();
  }
}

Referenced by VertexFit::BuildVirtualParticle(), SecondVertexFit::Fit(), and VertexConstraints::UpdateConstraints().

instance()

static VertexFitBField * VertexFitBField::instance ( )

inlinestatic

Definition at line 24 of file Analysis/VertexFit/VertexFit-00-02-74/VertexFit/BField.h.

                                     {
    if (s_bfield == 0) {
      s_bfield = new VertexFitBField();
    }
    return s_bfield;
  }

Referenced by FastVertexFit::addTrack(), VertexFit::BuildVirtualParticle(), HTrackParameter::center(), HTrackParameter::dHdp(), HTrackParameter::dHdx(), SecondVertexFit::Fit(), HTrackParameter::HTrackParameter(), HTrackParameter::positionTwoHelix(), HTrackParameter::radius(), VertexConstraints::UpdateConstraints(), and VFHelix::VFHelix().

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

• Analysis/VertexFit/VertexFit-00-02-74/VertexFit/BField.h
• Analysis/VertexFit/VertexFit-00-02-74/src/BField.cxx