SiHitDigitizer Class Reference

#include <SiHitDigitizer.h>

Public Member Functions
void	processHit (const PSimHit *, const StripGeomDetUnit &, GlobalVector, float, std::vector< float > &, size_t &, size_t &, const TrackerTopology *tTopo)
void	setChargeCollectionDrifter (SiChargeCollectionDrifter *cd)
void	setChargeDivider (SiChargeDivider *cd)
void	setInduceChargeOnStrips (SiInduceChargeOnStrips *cd)
void	setParticleDataTable (const ParticleDataTable *pdt)
	SiHitDigitizer (const edm::ParameterSet &conf, CLHEP::HepRandomEngine &)
	~SiHitDigitizer ()

Private Types
typedef GloballyPositioned < double >	Frame

Private Member Functions
LocalVector	DriftDirection (const StripGeomDetUnit *_detp, GlobalVector _bfield, float langle)

Private Attributes
const double	chargeMobility
const double	depletionVoltage
std::unique_ptr < SiChargeCollectionDrifter >	theSiChargeCollectionDrifter
std::unique_ptr< SiChargeDivider >	theSiChargeDivider
std::unique_ptr< const SiInduceChargeOnStrips >	theSiInduceChargeOnStrips

Detailed Description

Digitizes the response for a single SimHit.

Definition at line 30 of file SiHitDigitizer.h.

Member Typedef Documentation

typedef GloballyPositioned<double> SiHitDigitizer::Frame

private

Definition at line 64 of file SiHitDigitizer.h.

Constructor & Destructor Documentation

SiHitDigitizer::SiHitDigitizer	(	const edm::ParameterSet &	conf,
		CLHEP::HepRandomEngine &	eng
	)

Definition at line 16 of file SiHitDigitizer.cc.

                                                                                     :
  depletionVoltage(conf.getParameter<double>("DepletionVoltage")),
  chargeMobility(conf.getParameter<double>("ChargeMobility")),
  theSiChargeDivider(new SiLinearChargeDivider(conf, eng)),
  theSiChargeCollectionDrifter(new SiLinearChargeCollectionDrifter(
         CBOLTZ_over_e_SI * chargeMobility * conf.getParameter<double>("Temperature") * (conf.getParameter<bool>("noDiffusion") ? noDiffusionMultiplier : 1.0),
         conf.getParameter<double>("ChargeDistributionRMS"),
         depletionVoltage,
         conf.getParameter<double>("AppliedVoltage"))),
  theSiInduceChargeOnStrips(new SiTrivialInduceChargeOnStrips(conf, conf.getParameter<double>("GevPerElectron"))) {
}

SiHitDigitizer::~SiHitDigitizer

(

)

Definition at line 28 of file SiHitDigitizer.cc.

                               {
}

Member Function Documentation

LocalVector SiHitDigitizer::DriftDirection ( const StripGeomDetUnit *  _detp, GlobalVector  _bfield, float  langle  )

inlineprivate

Definition at line 66 of file SiHitDigitizer.h.

References GloballyPositioned< T >::position(), GloballyPositioned< T >::rotation(), GeomDet::surface(), toLocal(), PV3DBase< T, PVType, FrameType >::x(), and PV3DBase< T, PVType, FrameType >::y().

Referenced by processHit().

                                                                                                {
    LocalVector Bfield=Frame(_detp->surface().position(),_detp->surface().rotation()).toLocal(_bfield);
    return LocalVector(-langle * Bfield.y(),langle * Bfield.x(),1.);
  }

void SiHitDigitizer::processHit	(	const PSimHit *	hit,
		const StripGeomDetUnit &	det,
		GlobalVector	bfield,
		float	langle,
		std::vector< float > &	locAmpl,
		size_t &	firstChannelWithSignal,
		size_t &	lastChannelWithSignal,
		const TrackerTopology *	tTopo
	)

Definition at line 32 of file SiHitDigitizer.cc.

References Surface::bounds(), chargeMobility, depletionVoltage, DriftDirection(), GeomDet::specificSurface(), theSiChargeCollectionDrifter, theSiChargeDivider, theSiInduceChargeOnStrips, and Bounds::thickness().

Referenced by DigiSimLinkAlgorithm::run().

                                            {
  
  // Compute the drift direction for this det
  double moduleThickness = det.specificSurface().bounds().thickness(); // active detector thicness
  double timeNormalisation = (moduleThickness*moduleThickness)/(2.*depletionVoltage*chargeMobility);
  LocalVector driftDir = DriftDirection(&det,bfield,langle);
  
  // Fully process one SimHit
  theSiInduceChargeOnStrips->induce(
      theSiChargeCollectionDrifter->drift(
          theSiChargeDivider->divide(hit, driftDir, moduleThickness, det),
          driftDir,moduleThickness,timeNormalisation),
      det,locAmpl,firstChannelWithSignal,lastChannelWithSignal,tTopo);
}

void SiHitDigitizer::setChargeCollectionDrifter ( SiChargeCollectionDrifter *  cd )

inline

Definition at line 41 of file SiHitDigitizer.h.

References theSiChargeCollectionDrifter.

                                                                 {
    theSiChargeCollectionDrifter.reset(cd);
  }

void SiHitDigitizer::setChargeDivider ( SiChargeDivider *  cd )

inline

Definition at line 37 of file SiHitDigitizer.h.

References theSiChargeDivider.

                                             {
    theSiChargeDivider.reset(cd);
  }

void SiHitDigitizer::setInduceChargeOnStrips ( SiInduceChargeOnStrips *  cd )

inline

Definition at line 45 of file SiHitDigitizer.h.

References theSiInduceChargeOnStrips.

                                                           {
    theSiInduceChargeOnStrips.reset(cd);
  }

void SiHitDigitizer::setParticleDataTable ( const ParticleDataTable *  pdt )

inline

Definition at line 49 of file SiHitDigitizer.h.

References theSiChargeDivider.

Referenced by DigiSimLinkAlgorithm::setParticleDataTable().

                                                           { 
    theSiChargeDivider->setParticleDataTable(pdt); 
  }

Member Data Documentation

const double SiHitDigitizer::chargeMobility

private

Definition at line 59 of file SiHitDigitizer.h.

Referenced by processHit().

const double SiHitDigitizer::depletionVoltage

private

Definition at line 58 of file SiHitDigitizer.h.

Referenced by processHit().

std::unique_ptr<SiChargeCollectionDrifter> SiHitDigitizer::theSiChargeCollectionDrifter

private

Definition at line 61 of file SiHitDigitizer.h.

Referenced by processHit(), and setChargeCollectionDrifter().

std::unique_ptr<SiChargeDivider> SiHitDigitizer::theSiChargeDivider

private

Definition at line 60 of file SiHitDigitizer.h.

Referenced by processHit(), setChargeDivider(), and setParticleDataTable().

std::unique_ptr<const SiInduceChargeOnStrips> SiHitDigitizer::theSiInduceChargeOnStrips

private

Definition at line 62 of file SiHitDigitizer.h.

Referenced by processHit(), and setInduceChargeOnStrips().