Translator mirroring the simple Digitization. More...

#include <SimpleTDCCountTranslator.h>

Inheritance diagram for SimpleTDCCountTranslator:

Collaboration diagram for SimpleTDCCountTranslator:

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

	~SimpleTDCCountTranslator ()
	Destructor.

void	setEventTime (short eventTime=0)
	If trigger jitter was simulated, in every event one has to give an estimate of the effect.

double	getDriftLength (unsigned short tdcCount, const WireID &wireID=WireID(), double timeOfFlightEstimator=0, bool leftRight=false, double z=0, double=0, double=0, unsigned short=0) override
	Get Drift length (cm). More...

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

double	getDriftLengthResolution (double, const WireID &=WireID(), bool=false, double=0, double=0, double=0) override
	Uncertainty corresponding to drift length from getDriftLength of this class. More...

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

TVector3	m_backWirePos
	Wire position at the cdc backward endplate.

double	m_eventTime
	Event timing. More...

Detailed Description

Translator mirroring the simple Digitization.

Definition at line 23 of file SimpleTDCCountTranslator.h.

Member Function Documentation

◆ getDriftLength()

double getDriftLength	(	unsigned short	tdcCount,
		const WireID &	wireID = `WireID()`,
		double	timeOfFlightEstimator = `0`,
		bool	leftRight = `false`,
		double	z = `0`,
		double	= `0`,
		double	= `0`,
		unsigned short	= `0`
	)

overridevirtual

Get Drift length (cm).

@parm tdcCount TDC count (ns). @parm wireID Encoded sense wire ID. @parm timeOfFlightEstimator Time of Flight (ns). @parm leftRight left/right flag. @parm z z-positin on the wire (cm).

Implements TDCCountTranslatorBase.

Definition at line 16 of file SimpleTDCCountTranslator.cc.

 {
   const double driftTime = getDriftTime(tdcCount, wireID, timeOfFlightEstimator, z, 0);
  
   //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 = (driftTime >= 0.) ? driftTime * 4e-3 : -999.;
   return driftL;
 }

◆ getDriftLengthResolution()

double getDriftLengthResolution	(	double	,
		const WireID &	= `WireID()`,
		bool	= `false`,
		double	= `0`,
		double	= `0`,
		double	= `0`
	)

overridevirtual

Uncertainty corresponding to drift length from getDriftLength of this class.

this function returns the variance that is used as the CDC measurment resolution in track fitting if the default resolution of the CDC Digitizer is changed this value has to be changed, too! this variance is calculated by sigam_cdcHit^2 + sigma_translationError^2 sigma_translationError is an additional (non-gaussian) smearing is introduced due to driftlength to TDC conversio and can be (partially) corrected by adding sigma_translationError^2 = (40/sqrt(12) µm)^2 to sigam_cdcHit^2 see mail: [belle2_tracking:0515]

Currently in the simple digitization just a Gaussian smearing is used.