#include <MagneticFieldMap.h>

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 GlobalPoint &) const

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

double	inTeslaZ (const GlobalPoint &) const

double	inTeslaZ (const TrackerLayer &aLayer, double coord, int success) 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(), and TCMET_cfi::radius.

                                                             : 
   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

Referenced by magneticField().

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 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);
   }
 
 }

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));
   }
 
 }

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(), MagneticFieldMap(), and FamosManager::setupGeometryAndField().

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

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

Definition at line 121 of file MagneticFieldMap.cc.

References stringResolutionProvider_cfi::bin, bins, fieldBarrelBinWidth, fieldBarrelZMin, fieldEndcapBinWidth, fieldEndcapRMin, TrackerLayer::layerNumber(), pMF_, theFieldBarrelHisto(), theFieldEndcapHisto(), and 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);
 
   }
 
 }