DTLinearDriftAlgo Class Reference

#include <DTLinearDriftAlgo.h>

Inheritance diagram for DTLinearDriftAlgo:

Public Member Functions
bool	compute (const DTLayer *layer, const DTDigi &digi, LocalPoint &leftPoint, LocalPoint &rightPoint, LocalError &error) const override
bool	compute (const DTLayer *layer, const DTRecHit1D &recHit1D, const float &angle, DTRecHit1D &newHit1D) const override
bool	compute (const DTLayer *layer, const DTRecHit1D &recHit1D, const float &angle, const GlobalPoint &globPos, DTRecHit1D &newHit1D) const override
	DTLinearDriftAlgo (const edm::ParameterSet &config, edm::ConsumesCollector)
	Constructor. More...
void	setES (const edm::EventSetup &setup) override
	Pass the Event Setup to the algo at each event. More...
	~DTLinearDriftAlgo () override
	Destructor. More...
Public Member Functions inherited from DTRecHitBaseAlgo
	DTRecHitBaseAlgo (const edm::ParameterSet &config, edm::ConsumesCollector)
	Constructor. More...
virtual edm::OwnVector< DTRecHit1DPair >	reconstruct (const DTLayer *layer, const DTLayerId &layerId, const DTDigiCollection::Range &digiRange)
	Build all hits in the range associated to the layerId, at the 1st step. More...
virtual	~DTRecHitBaseAlgo ()
	Destructor. More...

Private Member Functions
virtual bool	compute (const DTLayer *layer, const DTWireId &wireId, const float digiTime, const GlobalPoint &globPos, LocalPoint &leftPoint, LocalPoint &rightPoint, LocalError &error, int step) const
virtual bool	compute (const DTLayer *layer, const DTWireId &wireId, const float digiTime, const GlobalPoint &globPos, DTRecHit1D &newHit1D, int step) const

Private Attributes
const bool	debug
const float	hitResolution
const float	maxTime
const float	minTime
const float	vDrift

Additional Inherited Members
Protected Attributes inherited from DTRecHitBaseAlgo
std::unique_ptr< DTTTrigBaseSync >	theSync

Detailed Description

Concrete implementation of DTRecHitBaseAlgo. Compute drift distance using constant drift velocity as defined in the "driftVelocity" parameter.

Author

G. Cerminara - INFN Torino

Definition at line 15 of file DTLinearDriftAlgo.h.

Constructor & Destructor Documentation

DTLinearDriftAlgo()

DTLinearDriftAlgo::DTLinearDriftAlgo	(	const edm::ParameterSet &	config,
		edm::ConsumesCollector	cc
	)

Constructor.

Definition at line 19 of file DTLinearDriftAlgo.cc.

    : DTRecHitBaseAlgo(config, cc),
      // Get the Drift Velocity from parameter set.
      vDrift(config.getParameter<double>("driftVelocity")),         // FIXME: Default was 0.00543 cm/ns
      hitResolution(config.getParameter<double>("hitResolution")),  // FIXME: Default is
      // vDriftMB1W1(config.getParameter<double>("driftVelocityMB1W1")), // FIXME: Default was 0.00543 cm/ns
      minTime(config.getParameter<double>("minTime")),  // FIXME: Default was -3 ns
      maxTime(config.getParameter<double>("maxTime")),  // FIXME: Default was 415 ns
      // Set verbose output
      debug(config.getUntrackedParameter<bool>("debug")) {}

~DTLinearDriftAlgo()

DTLinearDriftAlgo::~DTLinearDriftAlgo ( )

override

Destructor.

Definition at line 30 of file DTLinearDriftAlgo.cc.

{}

Member Function Documentation

compute() [1/5]

bool DTLinearDriftAlgo::compute ( const DTLayer *  layer, const DTDigi &  digi, LocalPoint &  leftPoint, LocalPoint &  rightPoint, LocalError &  error  ) const

overridevirtual

First step in computation of Left/Right hits from a Digi. The results are the local position (in DTLayer frame) of the Left and Right hit, and the error (which is common). Returns false on failure. The hit is assumed to be at the wire center.

Implements DTRecHitBaseAlgo.

Definition at line 35 of file DTLinearDriftAlgo.cc.

References relativeConstraints::error, nano_mu_digi_cff::layer, DTDigi::time(), and DTDigi::wire().

Referenced by compute().

                                                                                                                      {
  // Get the wireId
  DTLayerId layerId = layer->id();
  const DTWireId wireId(layerId, digi.wire());

  // Get Wire position
  if (!layer->specificTopology().isWireValid(digi.wire()))
    return false;
  LocalPoint locWirePos(layer->specificTopology().wirePosition(digi.wire()), 0, 0);
  const GlobalPoint globWirePos = layer->toGlobal(locWirePos);

  return compute(layer, wireId, digi.time(), globWirePos, leftPoint, rightPoint, error, 1);
}

compute() [2/5]

bool DTLinearDriftAlgo::compute ( const DTLayer *  layer, const DTRecHit1D &  recHit1D, const float &  angle, DTRecHit1D &  newHit1D  ) const

overridevirtual

Second step in hit position computation. It is the same as first step since the angular information is not used NOTE: Only position and error of the new hit are modified

Implements DTRecHitBaseAlgo.

Definition at line 51 of file DTLinearDriftAlgo.cc.

References DTRecHit1D::localPosition(), DTRecHit1D::localPositionError(), and DTRecHit1D::setPositionAndError().

                                                            {
  newHit1D.setPositionAndError(recHit1D.localPosition(), recHit1D.localPositionError());
  return true;
}

compute() [3/5]

bool DTLinearDriftAlgo::compute ( const DTLayer *  layer, const DTRecHit1D &  recHit1D, const float &  angle, const GlobalPoint &  globPos, DTRecHit1D &  newHit1D  ) const

overridevirtual

Third (and final) step in hits position computation. Also the hit position along the wire is available and can be used to correct the drift time for particle TOF and propagation of signal along the wire. NOTE: Only position and error of the new hit are modified

Implements DTRecHitBaseAlgo.

Definition at line 60 of file DTLinearDriftAlgo.cc.

References compute(), DTRecHit1D::digiTime(), nano_mu_digi_cff::layer, and DTRecHit1D::wireId().

                                                            {
  return compute(layer, recHit1D.wireId(), recHit1D.digiTime(), globPos, newHit1D, 3);
}

compute() [4/5]

bool DTLinearDriftAlgo::compute ( const DTLayer *  layer, const DTWireId &  wireId, const float  digiTime, const GlobalPoint &  globPos, LocalPoint &  leftPoint, LocalPoint &  rightPoint, LocalError &  error, int  step  ) const

privatevirtual

Definition at line 69 of file DTLinearDriftAlgo.cc.

References gather_cfg::cout, debug, validationMuonRPCDigis_cfi::digiTime, shallow::drift(), relativeConstraints::error, hitResolution, nano_mu_digi_cff::layer, maxTime, DTRecHitBaseAlgo::theSync, vDrift, DTWireId::wire(), PV3DBase< T, PVType, FrameType >::x(), PV3DBase< T, PVType, FrameType >::y(), and PV3DBase< T, PVType, FrameType >::z().

                                                {
  // Subtract the offset to the digi time accordingly to the DTTTrigBaseSync concrete instance
  float driftTime = digiTime - theSync->offset(layer, wireId, globPos);

  // check for out-of-time
  if (driftTime < minTime || driftTime > maxTime) {
    if (debug)
      cout << "[DTLinearDriftAlgo]*** Drift time out of window for in-time hits " << driftTime << endl;

    if (step == 1) {  //FIXME: protection against failure at 2nd and 3rd steps, must be checked!!!
      // Hits are interpreted as coming from out-of-time pile-up and recHit
      // is ignored.
      return false;
    }
  }

  // Small negative times interpreted as hits close to the wire.
  if (driftTime < 0.)
    driftTime = 0;

  // Compute the drift distance
  // SL 21-Dec-2006: Use specific Drift for MB1W1 (non fluxed chamber)
  float vd = vDrift;
  // if (wireId.wheel()==1 && wireId.station()==1) {
  //   vd=vDriftMB1W1;
  //   //cout << "Using Vd " << vd<< endl;
  // }

  float drift = driftTime * vd;

  // Get Wire position
  if (!layer->specificTopology().isWireValid(wireId.wire()))
    return false;
  LocalPoint locWirePos(layer->specificTopology().wirePosition(wireId.wire()), 0, 0);
  //Build the two possible points and the error on the position
  leftPoint = LocalPoint(locWirePos.x() - drift, locWirePos.y(), locWirePos.z());
  rightPoint = LocalPoint(locWirePos.x() + drift, locWirePos.y(), locWirePos.z());
  error = LocalError(hitResolution * hitResolution, 0., 0.);

  if (debug) {
    cout << "[DTLinearDriftAlgo] Compute drift distance, for digi at wire: " << wireId << endl
         << "       Step:           " << step << endl
         << "       Digi time:      " << digiTime << endl
         << "       Drift time:     " << driftTime << endl
         << "       Drift distance: " << drift << endl
         << "       Hit Resolution: " << hitResolution << endl
         << "       Left point:     " << leftPoint << endl
         << "       Right point:    " << rightPoint << endl
         << "       Error:          " << error << endl;
  }

  return true;
}

compute() [5/5]

bool DTLinearDriftAlgo::compute ( const DTLayer *  layer, const DTWireId &  wireId, const float  digiTime, const GlobalPoint &  globPos, DTRecHit1D &  newHit1D, int  step  ) const

privatevirtual

Definition at line 131 of file DTLinearDriftAlgo.cc.

References compute(), validationMuonRPCDigis_cfi::digiTime, relativeConstraints::error, Exception, nano_mu_digi_cff::layer, DTEnums::Left, DTRecHit1D::localPosition(), DTRecHit1D::lrSide(), DTEnums::Right, DTRecHit1D::setPositionAndError(), PV3DBase< T, PVType, FrameType >::x(), PV3DBase< T, PVType, FrameType >::y(), and PV3DBase< T, PVType, FrameType >::z().

                                                {
  LocalPoint leftPoint;
  LocalPoint rightPoint;
  LocalError error;

  if (compute(layer, wireId, digiTime, globPos, leftPoint, rightPoint, error, step)) {
    // Set the position and the error of the rechit which is being updated
    switch (newHit1D.lrSide()) {
      case DTEnums::Left: {
        // Keep the original y position of newHit1D: for step==3, it's the
        // position along the wire. Needed for rotation alignment
        LocalPoint leftPoint3D(leftPoint.x(), newHit1D.localPosition().y(), leftPoint.z());
        newHit1D.setPositionAndError(leftPoint3D, error);
        break;
      }

      case DTEnums::Right: {
        // as above: 3d position
        LocalPoint rightPoint3D(rightPoint.x(), newHit1D.localPosition().y(), rightPoint.z());
        newHit1D.setPositionAndError(rightPoint3D, error);
        break;
      }

      default:
        throw cms::Exception("InvalidDTCellSide") << "[DTLinearDriftAlgo] Compute at Step " << step << ", Hit side "
                                                  << newHit1D.lrSide() << " is invalid!" << endl;
        return false;
    }

    return true;
  } else {
    return false;
  }
}

setES()

void DTLinearDriftAlgo::setES ( const edm::EventSetup &  setup )

overridevirtual

Pass the Event Setup to the algo at each event.

Implements DTRecHitBaseAlgo.

Definition at line 32 of file DTLinearDriftAlgo.cc.

References singleTopDQM_cfi::setup, and DTRecHitBaseAlgo::theSync.

{ theSync->setES(setup); }

Member Data Documentation

debug

const bool DTLinearDriftAlgo::debug

private

Definition at line 91 of file DTLinearDriftAlgo.h.

Referenced by compute(), runTauIdMVA.TauIDEmbedder::load_againstElectronMVA6(), and runTauIdMVA.TauIDEmbedder::loadMVA_WPs_run2_2017().

hitResolution

const float DTLinearDriftAlgo::hitResolution

private

Definition at line 82 of file DTLinearDriftAlgo.h.

Referenced by compute().

maxTime

const float DTLinearDriftAlgo::maxTime

private

Definition at line 88 of file DTLinearDriftAlgo.h.

Referenced by compute().

minTime

const float DTLinearDriftAlgo::minTime

private

Definition at line 85 of file DTLinearDriftAlgo.h.

vDrift

const float DTLinearDriftAlgo::vDrift

private

Definition at line 77 of file DTLinearDriftAlgo.h.

Referenced by compute().