Translator mirroring the realistic Digitization. More...

#include <RealisticTDCCountTranslator.h>

Inheritance diagram for RealisticTDCCountTranslator:

Collaboration diagram for RealisticTDCCountTranslator:

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Public Member Functions
	RealisticTDCCountTranslator (bool useInWirePropagationDelay=false)
	Constructor, with the additional information, if propagation in the wire shall be considered.

	~RealisticTDCCountTranslator ()
	Destructor.

double	getDriftLength (unsigned short tdcCount, const WireID &wireID=WireID(), double timeOfFlightEstimator=0, bool leftRight=false, double z=0, double alpha=0, double theta=static_cast< double >(TMath::Pi()/2.), unsigned short adcCount=0) override
	Get Drift length. More...

double	getDriftTime (unsigned short tdcCount, const WireID &wireID, double timeOfFlightEstimator, double z, unsigned short adcCount) override
	Get Drift time. More...

double	getDriftLengthResolution (double driftLength, const WireID &wireID=WireID(), bool leftRight=false, double z=0, double alpha=0, double=static_cast< double >(TMath::Pi()/2.)) override
	Get position resolution^2 corresponding to the drift length from getDriftLength of this class. More...

Private Attributes
bool	m_useInWirePropagationDelay
	Flag to activate the propagation delay of the sense wire. More...

bool	m_realData = false
	Flag to distinguish betw. More...

StoreObjPtr< EventT0 >	m_eventTimeStoreObject
	Event timing. More...

const CDCGeoControlPar &	m_gcp
	Cached reference to CDC GeoControlPar object.

const CDCSimControlPar &	m_scp
	Cached reference to CDC SimControlPar object.

const CDCGeometryPar &	m_cdcp
	Cached reference to CDC GeometryPar object.

const double	m_tdcBinWidth
	Cached TDC bin width (ns). More...

double	m_fudgeFactor = 1.
	Cached fudge factor for space resol.

Detailed Description

Translator mirroring the realistic Digitization.

Definition at line 25 of file RealisticTDCCountTranslator.h.

Member Function Documentation

◆ getDriftLength()

double getDriftLength	(	unsigned short	tdcCount,
		const WireID &	wireID = `WireID()`,
		double	timeOfFlightEstimator = `0`,
		bool	leftRight = `false`,
		double	z = `0`,
		double	alpha = `0`,
		double	theta = `static_cast<double>(TMath::Pi() / 2.)`,
		unsigned short	adcCount = `0`
	)

overridevirtual

Get Drift length.

Parameters

tdcCount	TDC count (ns).
wireID	Encoded sense wire ID.
timeOfFlightEstimator	Time of flight (ns).
leftRight	left/right flag.
z	z-position on the wire (cm).
alpha	Track incident angle in r-phi plane (rad).
theta	Track incident angle in s-z plane (=polar angle) (rad).
adcCount	ADC count.

Returns: Drift length (cm) if drift time >= 0; v*(drift time) (i.e. negative value) otherwise, where v is set to one (cm/ns) for simplicity.

Implements TDCCountTranslatorBase.

Definition at line 92 of file RealisticTDCCountTranslator.cc.

 {
   const double driftTime = getDriftTime(tdcCount, wireID, timeOfFlightEstimator, z, adcCount);
  
   unsigned short layer = wireID.getICLayer();
  
   //Now we have an estimate for the time it took from the ionisation to the hitting of the wire.
   //Need to reverse calculate the relation between drift lenght and drift time.
   //  double driftL = std::copysign(m_cdcp.getDriftLength(fabs(driftTime), layer, leftRight, alpha, theta), driftTime);
   //Note: The above treatment for negative drifttime is now done in m_cdcp.getDriftLength, so the line is commented out
   double driftL = m_cdcp.getDriftLength(driftTime, layer, leftRight, alpha, theta);
  
 #if defined(CDC_DEBUG)
   cout << " " << endl;
   cout << "RealisticTDCCountTranslator::getDriftLength" << endl;
   cout << "driftTime=" << driftTime << endl;
   cout << "layer=" << layer << endl;
   cout << "leftright=" << leftRight << endl;
   cout << "driftL= " << driftL << endl;
 #endif
  
   return driftL;
 }

◆ getDriftLengthResolution()

double getDriftLengthResolution	(	double	driftLength,
		const WireID &	wireID = `WireID()`,
		bool	leftRight = `false`,
		double	z = `0`,
		double	alpha = `0`,
		double	theta = `static_cast<double>(TMath::Pi() / 2.)`
	)

overridevirtual

Get position resolution^2 corresponding to the drift length from getDriftLength of this class.

this function returns the variance that is used as the CDC measurment resolution in track fitting

Parameters

driftLength	Drift length (cm).
wireID	Encoded sense wire ID.
leftRight	Left/right flag.
z	z-position on the wire (cm).
alpha	Track incident angle in r-phi plane (rad).
theta	Track incident angle in s-z plane (=polar angle) (rad).