SiHitDigitizer Class Reference

#include <SiHitDigitizer.h>

List of all members.

Public Member Functions
void	processHit (const PSimHit *, const StripGeomDetUnit &, GlobalVector, float, std::vector< double > &, size_t &, size_t &)
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
double	appliedVoltage
double	chargeDistributionRMS
double	chargeMobility
edm::ParameterSet	conf_
double	depletionVoltage
double	gevperelectron
bool	noDiffusion
CLHEP::HepRandomEngine &	rndEngine
double	temperature
SiChargeCollectionDrifter *	theSiChargeCollectionDrifter
SiChargeDivider *	theSiChargeDivider
SiInduceChargeOnStrips *	theSiInduceChargeOnStrips

---

Detailed Description

Digitizes the response for a single SimHit.

Definition at line 27 of file SiHitDigitizer.h.

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Member Typedef Documentation

typedef GloballyPositioned<double> SiHitDigitizer::Frame [private]

Definition at line 69 of file SiHitDigitizer.h.

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Constructor & Destructor Documentation

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

Definition at line 14 of file SiHitDigitizer.cc.

References appliedVoltage, CBOLTZ, chargeDistributionRMS, chargeMobility, conf_, depletionVoltage, e_SI, edm::ParameterSet::getParameter(), gevperelectron, noDiffusion, rndEngine, temperature, theSiChargeCollectionDrifter, theSiChargeDivider, and theSiInduceChargeOnStrips.

                                                                                    :conf_(conf),rndEngine(eng){
  
  // Construct default classes
  depletionVoltage       = conf_.getParameter<double>("DepletionVoltage");
  appliedVoltage         = conf_.getParameter<double>("AppliedVoltage");
  chargeMobility         = conf_.getParameter<double>("ChargeMobility");
  temperature            = conf_.getParameter<double>("Temperature");
  gevperelectron         = conf_.getParameter<double>("GevPerElectron");
  chargeDistributionRMS  = conf_.getParameter<double>("ChargeDistributionRMS");
  noDiffusion            = conf_.getParameter<bool>("noDiffusion");
  double diffusionConstant = CBOLTZ/e_SI * chargeMobility * temperature;
  if (noDiffusion) diffusionConstant *= 1.0e-3;
  
  theSiChargeDivider = new SiLinearChargeDivider(conf_,rndEngine);
  
  theSiChargeCollectionDrifter = 
    new SiLinearChargeCollectionDrifter(diffusionConstant,
                                        chargeDistributionRMS,
                                        depletionVoltage,
                                        appliedVoltage);

  theSiInduceChargeOnStrips = new SiTrivialInduceChargeOnStrips(conf,gevperelectron);
}

SiHitDigitizer::~SiHitDigitizer

(

)

Definition at line 38 of file SiHitDigitizer.cc.

References theSiChargeCollectionDrifter, theSiChargeDivider, and theSiInduceChargeOnStrips.

                               {
  delete theSiChargeDivider;
  delete theSiChargeCollectionDrifter;
  delete theSiInduceChargeOnStrips;
}

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Member Function Documentation

LocalVector SiHitDigitizer::DriftDirection	(	const StripGeomDetUnit *	_detp,
		GlobalVector	_bfield,
		float	langle
	)		[inline, private]

Definition at line 71 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< double > &	locAmpl,
		size_t &	firstChannelWithSignal,
		size_t &	lastChannelWithSignal
	)

Definition at line 45 of file SiHitDigitizer.cc.

References BoundSurface::bounds(), chargeMobility, depletionVoltage, SiChargeDivider::divide(), SiChargeCollectionDrifter::drift(), DriftDirection(), SiInduceChargeOnStrips::induce(), GeomDet::specificSurface(), theSiChargeCollectionDrifter, theSiChargeDivider, theSiInduceChargeOnStrips, and Bounds::thickness().

Referenced by SiStripDigitizerAlgorithm::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);
}

void SiHitDigitizer::setChargeCollectionDrifter

(

SiChargeCollectionDrifter *

cd

)

[inline]

Definition at line 39 of file SiHitDigitizer.h.

References theSiChargeCollectionDrifter.

                                                                 {
    if (theSiChargeCollectionDrifter) delete theSiChargeCollectionDrifter;
    theSiChargeCollectionDrifter = cd;
  }

void SiHitDigitizer::setChargeDivider

(

SiChargeDivider *

cd

)

[inline]

Definition at line 34 of file SiHitDigitizer.h.

References theSiChargeDivider.

                                             {
    if (theSiChargeDivider) delete theSiChargeDivider;
    theSiChargeDivider = cd;
  }

void SiHitDigitizer::setInduceChargeOnStrips

(

SiInduceChargeOnStrips *

cd

)

[inline]

Definition at line 44 of file SiHitDigitizer.h.

References theSiInduceChargeOnStrips.

                                                           {
    if (theSiInduceChargeOnStrips) delete theSiInduceChargeOnStrips;
    theSiInduceChargeOnStrips = cd;
  }

void SiHitDigitizer::setParticleDataTable

(

const ParticleDataTable *

pdt

)

[inline]

Definition at line 49 of file SiHitDigitizer.h.

References SiChargeDivider::setParticleDataTable(), and theSiChargeDivider.

Referenced by SiStripDigitizerAlgorithm::setParticleDataTable().

                                                           { 
    theSiChargeDivider->setParticleDataTable(pdt); 
  }

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Member Data Documentation

double SiHitDigitizer::appliedVoltage [private]

Definition at line 63 of file SiHitDigitizer.h.

Referenced by SiHitDigitizer().

double SiHitDigitizer::chargeDistributionRMS [private]

Definition at line 67 of file SiHitDigitizer.h.

Referenced by SiHitDigitizer().

double SiHitDigitizer::chargeMobility [private]

Definition at line 64 of file SiHitDigitizer.h.

Referenced by processHit(), and SiHitDigitizer().

edm::ParameterSet SiHitDigitizer::conf_ [private]

Definition at line 60 of file SiHitDigitizer.h.

Referenced by SiHitDigitizer().

double SiHitDigitizer::depletionVoltage [private]

Definition at line 62 of file SiHitDigitizer.h.

Referenced by processHit(), and SiHitDigitizer().

double SiHitDigitizer::gevperelectron [private]

Definition at line 68 of file SiHitDigitizer.h.

Referenced by SiHitDigitizer().

bool SiHitDigitizer::noDiffusion [private]

Definition at line 66 of file SiHitDigitizer.h.

Referenced by SiHitDigitizer().

CLHEP::HepRandomEngine& SiHitDigitizer::rndEngine [private]

Definition at line 61 of file SiHitDigitizer.h.

Referenced by SiHitDigitizer().

double SiHitDigitizer::temperature [private]

Definition at line 65 of file SiHitDigitizer.h.

Referenced by SiHitDigitizer().

SiChargeCollectionDrifter* SiHitDigitizer::theSiChargeCollectionDrifter [private]

Definition at line 58 of file SiHitDigitizer.h.

Referenced by processHit(), setChargeCollectionDrifter(), SiHitDigitizer(), and ~SiHitDigitizer().

SiChargeDivider* SiHitDigitizer::theSiChargeDivider [private]

Definition at line 57 of file SiHitDigitizer.h.

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

SiInduceChargeOnStrips* SiHitDigitizer::theSiInduceChargeOnStrips [private]

Definition at line 59 of file SiHitDigitizer.h.

Referenced by processHit(), setInduceChargeOnStrips(), SiHitDigitizer(), and ~SiHitDigitizer().