#include <MultipleScatteringGeometry.h>

Public Member Functions
std::vector< MSLayer >	detLayers (float eta, float z, const edm::EventSetup &iSetup) const

std::vector< MSLayer >	detLayers (const edm::EventSetup &iSetup) const

	MultipleScatteringGeometry (const edm::EventSetup &iSetup)

std::vector< MSLayer >	otherLayers (float eta, const edm::EventSetup &iSetup) const

Protected Attributes
std::vector< const DetLayer * >	theLayers

Static Protected Attributes
static const float	beamPipeR = 2.94

static const float	endflangesZ = 30

static const float	supportR = 19.

Detailed Description

Definition at line 9 of file MultipleScatteringGeometry.h.

Constructor & Destructor Documentation

MultipleScatteringGeometry::MultipleScatteringGeometry ( const edm::EventSetup & iSetup )

Definition at line 22 of file MultipleScatteringGeometry.cc.

References edm::EventSetup::get().

 {
 
   edm::ESHandle<GeometricSearchTracker> track;
   iSetup.get<TrackerRecoGeometryRecord>().get( track ); 
 
   vector<BarrelDetLayer*> barrelLayers=track->barrelLayers();
   vector<BarrelDetLayer*>::const_iterator ib;
   vector<ForwardDetLayer*> forwardPosLayers=track->posForwardLayers();
   vector<ForwardDetLayer*> forwardNegLayers=track->negForwardLayers();
   vector<ForwardDetLayer*>::const_iterator ie;
   // barrelLayers = accessor.barrelLayers();
   for (ib = barrelLayers.begin(); ib != barrelLayers.end(); ib++)
     theLayers.push_back(*ib);
 
 //   forwardLayers = accessor.negativeEndcapLayers();
   for (ie = forwardPosLayers.begin(); ie != forwardPosLayers.end(); ie++)
     theLayers.push_back(*ie);
   for (ie = forwardNegLayers.begin(); ie != forwardNegLayers.end(); ie++)
     theLayers.push_back(*ie);
 
 }

Member Function Documentation

vector< MSLayer > MultipleScatteringGeometry::detLayers	(	float	eta,
		float	z,
		const edm::EventSetup &	iSetup
	)		const

Definition at line 55 of file MultipleScatteringGeometry.cc.

References alongMomentum, GeomDetEnumerators::barrel, BoundSurface::bounds(), edm::contains(), dir, GeomDetEnumerators::endcap, edm::EventSetup::get(), TrajectoryStateOnSurface::globalPosition(), BoundDisk::innerRadius(), PixelRecoRange< T >::inside(), TrajectoryStateOnSurface::isValid(), Bounds::length(), BoundDisk::outerRadius(), PV3DBase< T, PVType, FrameType >::perp(), GeometricSearchDet::position(), GloballyPositioned< T >::position(), StraightLinePropagator::propagate(), LargeD0_PixelPairStep_cff::propagator, alignCSCRings::r, Cylinder::radius(), query::result, ForwardDetLayer::specificSurface(), BarrelDetLayer::specificSurface(), Bounds::thickness(), PV3DBase< T, PVType, FrameType >::z(), and zero.

Referenced by MSLayersKeeperX0Averaged::init().

 {
   vector<MSLayer> result;
   GlobalPoint zero(0,0,z);
   float r=1; float dirZ = r*sinh(eta);
   GlobalVector dir(r,0.,dirZ);
   edm::ESHandle<MagneticField> pSetup;
   iSetup.get<IdealMagneticFieldRecord>().get(pSetup);
   FreeTrajectoryState fts( GlobalTrajectoryParameters(zero,dir,1,&(*pSetup)) );
   StraightLinePropagator propagator(&(*pSetup),alongMomentum);
   vector<const DetLayer*>::const_iterator il;
   TrajectoryStateOnSurface tsos;
   for (il = theLayers.begin(); il != theLayers.end(); il++) {
     bool contains=false;
 //  if ((*il)->subDetector() != PixelBarrel && (*il)->subDetector()!= PixelEndcap) continue;
 
     if ( (*il)->location() == barrel ) {
       const BarrelDetLayer * bl = dynamic_cast<const BarrelDetLayer*>(*il);
       if (!bl) continue;
       tsos = propagator.propagate(fts, bl->specificSurface());
       if (!tsos.isValid()) continue;
       float r=bl->specificSurface().radius();
       float dr = bl->specificSurface().bounds().thickness();
       float z=bl->position().z();
       float dz = bl->specificSurface().bounds().length(); 
       PixelRecoRange<float> rRange(r-dr/2., r+dr/2.);
       PixelRecoRange<float> zRange(z-dz/2., z+dz/2.);
       contains =    rRange.inside(tsos.globalPosition().perp()) 
                  && zRange.inside(tsos.globalPosition().z());
       //     contains = bl->contains((*il)->toLocal(tsos.globalPosition()));
     }
     else if ((*il)->location() == endcap) {
       const ForwardDetLayer * fl = dynamic_cast<const ForwardDetLayer*>(*il);
       if (!fl) continue;
       if (fl->position().z() * eta < 0) continue;
       const BoundDisk & disk = fl->specificSurface();
       tsos = propagator.propagate(fts, disk);
       if (!tsos.isValid()) continue;
       float zMin = disk.position().z()-disk.bounds().thickness()/2;
       float zMax = disk.position().z()+disk.bounds().thickness()/2;
       PixelRecoRange<float> rRange(disk.innerRadius(), disk.outerRadius());
       PixelRecoRange<float> zRange(zMin, zMax);
       contains = rRange.inside(tsos.globalPosition().perp()) 
               && zRange.inside(tsos.globalPosition().z());
       //     contains = fl->contains(fl->toLocal(tsos.globalPosition()));
     }
     if (contains) result.push_back(MSLayer(*il));
   }
   return result;
 }

vector< MSLayer > MultipleScatteringGeometry::detLayers ( const edm::EventSetup & iSetup ) const

Definition at line 46 of file MultipleScatteringGeometry.cc.

References query::result.

 {
   vector<MSLayer> result;
   vector<const DetLayer*>::const_iterator il;
   for (il=theLayers.begin();il!=theLayers.end();il++) result.push_back(MSLayer(*il)); 
   return result;
 }

vector< MSLayer > MultipleScatteringGeometry::otherLayers	(	float	eta,
		const edm::EventSetup &	iSetup
	)		const

Definition at line 106 of file MultipleScatteringGeometry.cc.

References GeomDetEnumerators::barrel, GeomDetEnumerators::endcap, PixelRecoPointRZ::r(), query::result, and PixelRecoPointRZ::z().

Referenced by MSLayersKeeperX0Averaged::init().

 {
   vector<MSLayer> result;
   // zero
   //  MSLayer zero(barrel, 0., MSLayer::Range(-15,15));
   //  result.push_back(zero);
 
   // beampipe
   MSLayer beampipe(barrel, beamPipeR, MSLayer::Range(-100,100));
 
   result.push_back(beampipe);
 
   // endflanges
   PixelRecoPointRZ endfPoint = (eta > 0) ?
       PixelRecoPointRZ(endflangesZ/sinh(eta), endflangesZ)
     : PixelRecoPointRZ(-endflangesZ/sinh(eta), -endflangesZ);
   if (0 < endfPoint.r() && endfPoint.r() < supportR) {
     MSLayer endflanges(endcap,endfPoint.z(),MSLayer::Range(0.1,supportR-0.1));
     result.push_back(endflanges);
   }
 
   // support
   MSLayer support( barrel,supportR, MSLayer::Range(-280,280));
   result.push_back(support);
 
   return result;
 }