RealisticTDCCountTranslator Class Reference

Translator mirroring the realistic Digitization. More...

#include <RealisticTDCCountTranslator.h>

Inheritance diagram for RealisticTDCCountTranslator:

Collaboration diagram for RealisticTDCCountTranslator:

Public Member Functions
	RealisticTDCCountTranslator (bool useInWirePropagationDelay=false)
	Constructor, with the additional information, if propagation in the wire shall be considered.
	~RealisticTDCCountTranslator ()
	Destructor.
void	setEventTime (double eventTime=0)
	If trigger jitter was simulated, in every event one has to give an estimate of the effect. More...
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).

Returns

Uncertainty^2 (cm^2) on the drift length.

Implements TDCCountTranslatorBase.

Definition at line 126 of file RealisticTDCCountTranslator.cc.

getDriftTime()

double getDriftTime ( unsigned short  tdcCount, const WireID &  wireID, double  timeOfFlightEstimator, double  z, unsigned short  adcCount  )

overridevirtual

Get Drift time.

Parameters

tdcCount	TDC count (ns).
wireID	Encoded sense wire ID.
timeOfFlightEstimator	Time of flight (ns).
z	z-position on the wire (cm).
adcCount	ADC count.

Returns

Drift time (ns)

Implements TDCCountTranslatorBase.

Definition at line 39 of file RealisticTDCCountTranslator.cc.

setEventTime()

void setEventTime ( double  eventTime = 0 )

inline

If trigger jitter was simulated, in every event one has to give an estimate of the effect.

To reproduce the old behaviour, we replace the final event t0 here

Definition at line 38 of file RealisticTDCCountTranslator.h.

      {
        if (not m_eventTimeStoreObject.isValid()) {
          m_eventTimeStoreObject.create();
        }
 
        m_eventTimeStoreObject->setEventT0(eventTime, 0, Const::CDC);
      }

Member Data Documentation

m_eventTimeStoreObject

StoreObjPtr<EventT0> m_eventTimeStoreObject

private

Event timing.

The event time is fetched from the data store using this pointer.

Definition at line 117 of file RealisticTDCCountTranslator.h.

m_realData

bool m_realData = false

private

Flag to distinguish betw.

data and MC.

Definition at line 112 of file RealisticTDCCountTranslator.h.

m_tdcBinWidth

const double m_tdcBinWidth

private

Cached TDC bin width (ns).

N.B. The declaration should be after m_cdcp for proper initialization.

Definition at line 143 of file RealisticTDCCountTranslator.h.

m_useInWirePropagationDelay

bool m_useInWirePropagationDelay

private

Flag to activate the propagation delay of the sense wire.

true : activated, false : the propagation delay is not used.

Definition at line 107 of file RealisticTDCCountTranslator.h.

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The documentation for this class was generated from the following files:

• cdc/translators/include/RealisticTDCCountTranslator.h
• cdc/translators/src/RealisticTDCCountTranslator.cc