MagneticFieldMap Class Reference

#include <MagneticFieldMap.h>

List of all members.

Public Member Functions
const GlobalVector	inInverseGeV (const GlobalPoint &) const
double	inInverseGeVZ (const GlobalPoint &) const
const GlobalVector	inKGauss (const GlobalPoint &) const
double	inKGaussZ (const GlobalPoint &) const
const GlobalVector	inTesla (const TrackerLayer &aLayer, double coord, int success) const
const GlobalVector	inTesla (const GlobalPoint &) const
double	inTeslaZ (const TrackerLayer &aLayer, double coord, int success) const
double	inTeslaZ (const GlobalPoint &) const
const MagneticField &	magneticField () const
	MagneticFieldMap (const MagneticField *pmF, const TrackerInteractionGeometry *myGeo)
Private Member Functions
void	initialize ()
const std::vector< double > *	theFieldBarrelHisto (unsigned layer) const
const std::vector< double > *	theFieldEndcapHisto (unsigned layer) const
Private Attributes
unsigned	bins
std::vector< double >	fieldBarrelBinWidth
std::vector< std::vector < double > >	fieldBarrelHistos
std::vector< double >	fieldBarrelZMin
std::vector< double >	fieldEndcapBinWidth
std::vector< std::vector < double > >	fieldEndcapHistos
std::vector< double >	fieldEndcapRMin
const TrackerInteractionGeometry *	geometry_
const MagneticField *	pMF_

---

Detailed Description

Definition at line 18 of file MagneticFieldMap.h.

---

Constructor & Destructor Documentation

MagneticFieldMap::MagneticFieldMap	(	const MagneticField *	pmF,
		const TrackerInteractionGeometry *	myGeo
	)

Definition at line 7 of file MagneticFieldMap.cc.

References bins, TrackerInteractionGeometry::cylinderBegin(), TrackerInteractionGeometry::cylinderEnd(), fieldBarrelBinWidth, fieldBarrelHistos, fieldBarrelZMin, fieldEndcapBinWidth, fieldEndcapHistos, fieldEndcapRMin, geometry_, inTeslaZ(), CosmicsPD_Skims::radius, and ExpressReco_HICollisions_FallBack::step.

                                                                            : 
  pMF_(pMF), 
  geometry_(myGeo),
  bins(101), 
  fieldBarrelHistos(200,static_cast<std::vector<double> >
                    (std::vector<double>(bins,static_cast<double>(0.)))),
  fieldEndcapHistos(200,static_cast<std::vector<double> > 
                     (std::vector<double>(bins,static_cast<double>(0.)))),
  fieldBarrelBinWidth(200,static_cast<double>(0.)),
  fieldBarrelZMin(200,static_cast<double>(0.)),
  fieldEndcapBinWidth(200,static_cast<double>(0.)),
  fieldEndcapRMin(200,static_cast<double>(0.))

{
  
  std::list<TrackerLayer>::const_iterator cyliter;
  std::list<TrackerLayer>::const_iterator cylitBeg=geometry_->cylinderBegin();
  std::list<TrackerLayer>::const_iterator cylitEnd=geometry_->cylinderEnd();
  
  // Prepare the histograms
  // std::cout << "Prepare magnetic field local database for FAMOS speed-up" << std::endl;
  for ( cyliter=cylitBeg; cyliter != cylitEnd; ++cyliter ) {
    int layer = cyliter->layerNumber();
    //    cout << " Fill Histogram " << hist << endl;

    // Cylinder bounds
    double zmin = 0.;
    double zmax; 
    double rmin = 0.;
    double rmax; 
    if ( cyliter->forward() ) {
      zmax = cyliter->disk()->position().z();
      rmax = cyliter->disk()->outerRadius();
    } else {
      zmax = cyliter->cylinder()->bounds().length()/2.;
      rmax = cyliter->cylinder()->bounds().width()/2.
           - cyliter->cylinder()->bounds().thickness()/2.;
    }

    // Histograms
    double step;

    // Disk histogram characteristics
    step = (rmax-rmin)/(bins-1);
    fieldEndcapBinWidth[layer] = step;
    fieldEndcapRMin[layer] = rmin;

    // Fill the histo
    int endcapBin = 0;
    for ( double radius=rmin+step/2.; radius<rmax+step; radius+=step ) {
      double field = inTeslaZ(GlobalPoint(radius,0.,zmax));
      fieldEndcapHistos[layer][endcapBin++] = field;
    }

    // Barrel Histogram characteritics
    step = (zmax-zmin)/(bins-1);
    fieldBarrelBinWidth[layer] = step;
    fieldBarrelZMin[layer] = zmin;

    // Fill the histo
    int barrelBin = 0;
    for ( double zed=zmin+step/2.; zed<zmax+step; zed+=step ) {
      double field = inTeslaZ(GlobalPoint(rmax,0.,zed));
      fieldBarrelHistos[layer][barrelBin++] = field;
    }
  }
}

---

Member Function Documentation

const GlobalVector MagneticFieldMap::inInverseGeV

(

const GlobalPoint &

gp

)

const

Definition at line 107 of file MagneticFieldMap.cc.

References inKGauss().

                                                           {
  
  return inKGauss(gp) * 2.99792458e-4;

} 

double MagneticFieldMap::inInverseGeVZ

(

const GlobalPoint &

gp

)

const

Definition at line 168 of file MagneticFieldMap.cc.

References inKGaussZ().

                                                           {

   return inKGaussZ(gp) * 2.99792458e-4;

}

void MagneticFieldMap::initialize

(

)

[private]

const GlobalVector MagneticFieldMap::inKGauss

(

const GlobalPoint &

gp

)

const

Definition at line 100 of file MagneticFieldMap.cc.

References inTesla().

Referenced by inInverseGeV().

                                                       {
  
  return inTesla(gp) * 10.;

}

double MagneticFieldMap::inKGaussZ

(

const GlobalPoint &

gp

)

const

Definition at line 161 of file MagneticFieldMap.cc.

References inTeslaZ().

Referenced by inInverseGeVZ().

                                                       {

    return inTeslaZ(gp)/10.;

}

const GlobalVector MagneticFieldMap::inTesla	(	const TrackerLayer &	aLayer,
		double	coord,
		int	success
	)		const

Definition at line 89 of file MagneticFieldMap.cc.

References inTeslaZ(), and pMF_.

                                                                                     {

  if (!pMF_) {
    return GlobalVector( 0., 0., 4.);
  } else {
    return GlobalVector(0.,0.,inTeslaZ(aLayer,coord,success));
  }

}

const GlobalVector MagneticFieldMap::inTesla

(

const GlobalPoint &

gp

)

const

Definition at line 78 of file MagneticFieldMap.cc.

References MagneticField::inTesla(), and pMF_.

Referenced by inKGauss().

                                                      {

  if (!pMF_) {
    return GlobalVector( 0., 0., 4.);
  } else {
    return pMF_->inTesla(gp);
  }

}

double MagneticFieldMap::inTeslaZ	(	const TrackerLayer &	aLayer,
		double	coord,
		int	success
	)		const

Definition at line 121 of file MagneticFieldMap.cc.

References newFWLiteAna::bin, bins, fieldBarrelBinWidth, fieldBarrelZMin, fieldEndcapBinWidth, fieldEndcapRMin, TrackerLayer::layerNumber(), pMF_, theFieldBarrelHisto(), theFieldEndcapHisto(), and ExpressReco_HICollisions_FallBack::x.

{

  if (!pMF_) {
    return 4.;
  } else {
    // Find the relevant histo
    double theBinWidth;
    double theXMin;
    unsigned layer = aLayer.layerNumber();
    const std::vector<double>* theHisto;

    if ( success == 1 ) { 
      theHisto = theFieldBarrelHisto(layer);
      theBinWidth = fieldBarrelBinWidth[layer];
      theXMin = fieldBarrelZMin[layer];
    } else {
      theHisto = theFieldEndcapHisto(layer);
      theBinWidth = fieldEndcapBinWidth[layer];
      theXMin = fieldEndcapRMin[layer];
    }
    
    // Find the relevant bin
    double x = fabs(coord);
    unsigned bin = (unsigned) ((x-theXMin)/theBinWidth);
    if ( bin+1 == (unsigned)bins ) bin -= 1; // Add a protection against coordinates near the layer edge
    double x1 = theXMin + (bin-0.5)*theBinWidth;
    double x2 = x1+theBinWidth;      

    // Determine the field
    double field1 = (*theHisto)[bin];
    double field2 = (*theHisto)[bin+1];

    return field1 + (field2-field1) * (x-x1)/(x2-x1);

  }

}

double MagneticFieldMap::inTeslaZ

(

const GlobalPoint &

gp

)

const

Definition at line 114 of file MagneticFieldMap.cc.

References MagneticField::inTesla(), pMF_, and PV3DBase< T, PVType, FrameType >::z().

Referenced by ParticlePropagator::fieldMap(), inKGaussZ(), inTesla(), and MagneticFieldMap().

                                                      {

    return pMF_ ? pMF_->inTesla(gp).z() : 4.0;

}

const MagneticField& MagneticFieldMap::magneticField

(

)

const [inline]

Definition at line 35 of file MagneticFieldMap.h.

References pMF_.

{return *pMF_;}

const std::vector<double>* MagneticFieldMap::theFieldBarrelHisto

(

unsigned

layer

)

const [inline, private]

Definition at line 44 of file MagneticFieldMap.h.

References fieldBarrelHistos.

Referenced by inTeslaZ().

    { return &(fieldBarrelHistos[layer]); } 

const std::vector<double>* MagneticFieldMap::theFieldEndcapHisto

(

unsigned

layer

)

const [inline, private]

Definition at line 41 of file MagneticFieldMap.h.

References fieldEndcapHistos.

Referenced by inTeslaZ().

    { return &(fieldEndcapHistos[layer]); } 

---

Member Data Documentation

unsigned MagneticFieldMap::bins [private]

Definition at line 49 of file MagneticFieldMap.h.

Referenced by inTeslaZ(), and MagneticFieldMap().

std::vector<double> MagneticFieldMap::fieldBarrelBinWidth [private]

Definition at line 52 of file MagneticFieldMap.h.

Referenced by inTeslaZ(), and MagneticFieldMap().

std::vector<std::vector<double> > MagneticFieldMap::fieldBarrelHistos [private]

Definition at line 50 of file MagneticFieldMap.h.

Referenced by MagneticFieldMap(), and theFieldBarrelHisto().

std::vector<double> MagneticFieldMap::fieldBarrelZMin [private]

Definition at line 53 of file MagneticFieldMap.h.

Referenced by inTeslaZ(), and MagneticFieldMap().

std::vector<double> MagneticFieldMap::fieldEndcapBinWidth [private]

Definition at line 54 of file MagneticFieldMap.h.

Referenced by inTeslaZ(), and MagneticFieldMap().

std::vector<std::vector<double> > MagneticFieldMap::fieldEndcapHistos [private]

Definition at line 51 of file MagneticFieldMap.h.

Referenced by MagneticFieldMap(), and theFieldEndcapHisto().

std::vector<double> MagneticFieldMap::fieldEndcapRMin [private]

Definition at line 55 of file MagneticFieldMap.h.

Referenced by inTeslaZ(), and MagneticFieldMap().

const TrackerInteractionGeometry* MagneticFieldMap::geometry_ [private]

Definition at line 48 of file MagneticFieldMap.h.

Referenced by MagneticFieldMap().

const MagneticField* MagneticFieldMap::pMF_ [private]

Definition at line 47 of file MagneticFieldMap.h.

Referenced by inTesla(), inTeslaZ(), and magneticField().