#include <DTDigitizer.h>

Inheritance diagram for DTDigitizer:

Classes
struct	hitLessT

Public Member Functions
	DTDigitizer (const edm::ParameterSet &)

void	produce (edm::Event &, const edm::EventSetup &) override

Public Member Functions inherited from edm::stream::EDProducer<>
	EDProducer ()=default

bool	hasAbilityToProduceInBeginLumis () const final

bool	hasAbilityToProduceInBeginRuns () const final

bool	hasAbilityToProduceInEndLumis () const final

bool	hasAbilityToProduceInEndRuns () const final

Private Types
typedef std::map< DTWireId, std::vector< const PSimHit * > >	DTWireIdMap

typedef DTWireIdMap::const_iterator	DTWireIdMapConstIter

typedef DTWireIdMap::iterator	DTWireIdMapIter

typedef std::pair< const PSimHit *, float >	hitAndT

typedef std::vector< hitAndT >	TDContainer

Private Member Functions
float	asymGausSmear (double mean, double sigmaLeft, double sigmaRight, CLHEP::HepRandomEngine *) const

std::pair< float, bool >	computeTime (const DTLayer layer, const DTWireId &wireId, const PSimHit hit, const LocalVector &BLoc, CLHEP::HepRandomEngine *)

std::pair< float, bool >	driftTimeFromParametrization (float x, float alpha, float By, float Bz, CLHEP::HepRandomEngine *) const

std::pair< float, bool >	driftTimeFromTimeMap () const

void	dumpHit (const PSimHit *hit, float xEntry, float xExit, const DTTopology &topo)

float	externalDelays (const DTLayer layer, const DTWireId &wireId, const PSimHit hit) const

void	storeDigis (DTWireId &wireId, TDContainer &hits, DTDigiCollection &output, DTDigiSimLinkCollection &outputLinks)

Private Attributes
int	base

edm::EDGetTokenT< CrossingFrame< PSimHit > >	cf_token

std::string	collection_for_XF

float	deadTime

bool	debug

std::string	geometryType

bool	IdealModel

bool	interpolate

float	LinksTimeWindow

std::string	mix_

bool	MultipleLinks

bool	onlyMuHits

float	smearing

std::string	syncName

float	theConstVDrift

std::unique_ptr< DTDigiSyncBase >	theSync

double	vPropWire

Friends
class	DTDigitizerAnalysis

Additional Inherited Members
Public Types inherited from edm::stream::EDProducer<>
typedef CacheContexts< T... >	CacheTypes

typedef CacheTypes::GlobalCache	GlobalCache

typedef AbilityChecker< T... >	HasAbility

typedef CacheTypes::LuminosityBlockCache	LuminosityBlockCache

typedef LuminosityBlockContextT< LuminosityBlockCache, RunCache, GlobalCache >	LuminosityBlockContext

typedef CacheTypes::LuminosityBlockSummaryCache	LuminosityBlockSummaryCache

typedef CacheTypes::RunCache	RunCache

typedef RunContextT< RunCache, GlobalCache >	RunContext

typedef CacheTypes::RunSummaryCache	RunSummaryCache

Detailed Description

Digitize the muon drift tubes. The parametrisation function in DTDriftTimeParametrization from P.G.Abia, J.Puerta is used in all cases where it is applicable.

Authors: : G. Bevilacqua, N. Amapane, G. Cerminara, R. Bellan

Definition at line 46 of file DTDigitizer.h.

Member Typedef Documentation

typedef std::map<DTWireId, std::vector<const PSimHit *> > DTDigitizer::DTWireIdMap

private

Definition at line 56 of file DTDigitizer.h.

typedef DTWireIdMap::const_iterator DTDigitizer::DTWireIdMapConstIter

private

Definition at line 58 of file DTDigitizer.h.

typedef DTWireIdMap::iterator DTDigitizer::DTWireIdMapIter

private

Definition at line 57 of file DTDigitizer.h.

typedef std::pair<const PSimHit *, float> DTDigitizer::hitAndT

private

Definition at line 53 of file DTDigitizer.h.

typedef std::vector<hitAndT> DTDigitizer::TDContainer

private

Definition at line 54 of file DTDigitizer.h.

Constructor & Destructor Documentation

DTDigitizer::DTDigitizer ( const edm::ParameterSet & conf_ )

explicit

Definition at line 57 of file DTDigitizer.cc.

References base, cf_token, collection_for_XF, deadTime, debug, Exception, geometryType, timingPdfMaker::get, edm::ParameterSet::getParameter(), IdealModel, HLT_2018_cff::InputTag, interpolate, edm::Service< T >::isAvailable(), LinksTimeWindow, mix_, MultipleLinks, onlyMuHits, smearing, AlCaHLTBitMon_QueryRunRegistry::string, theConstVDrift, and vPropWire.

     :  // Sync Algo
       theSync{DTDigiSyncFactory::get()->create(conf_.getParameter<string>("SyncName"),
                                                conf_.getParameter<ParameterSet>("pset"))} {
   // Set verbose output
   debug = conf_.getUntrackedParameter<bool>("debug");
 
   if (debug)
     LogPrint("DTDigitizer") << "Creating a DTDigitizer" << endl;
 
   // register the Producer with a label
   // produces<DTDigiCollection>("MuonDTDigis"); // FIXME: Do I pass it by
   // ParameterSet?
   produces<DTDigiCollection>();  // FIXME: Do I pass it by ParameterSet?
   //  produces<DTDigiSimLinkCollection>("MuonDTDigiSimLinks");
   produces<DTDigiSimLinkCollection>();
 
   // Parameters:
 
   // build digis only for mu hits (for debug purposes)
   onlyMuHits = conf_.getParameter<bool>("onlyMuHits");
 
   // interpolate parametrization function
   interpolate = conf_.getParameter<bool>("interpolate");
 
   // Velocity of signal propagation along the wire (cm/ns)
   // For the default value
   // cfr. CMS-IN 2000-021:   (2.56+-0.17)x1e8 m/s
   //      CMS NOTE 2003-17:  (0.244)  m/ns
   vPropWire = conf_.getParameter<double>("vPropWire");  // 24.4
 
   // Dead time for signals on the same wire (number from M. Pegoraro)
   deadTime = conf_.getParameter<double>("deadTime");  // 150
 
   // further configurable smearing
   smearing = conf_.getParameter<double>("Smearing");  // 3.
 
   // Debug flag to switch to the Ideal model
   // it uses a constant drift velocity and doesn't set any external delay
   IdealModel = conf_.getParameter<bool>("IdealModel");
 
   // Flag to specify that we want digis in phase-2 units (25./30. ns)
   // instead that the old units (25./32.)
   if (conf_.getParameter<bool>("phase2Digis"))
     base = 30;
   else
     base = 32;
 
   // Constant drift velocity needed by the above flag
   if (IdealModel)
     theConstVDrift = conf_.getParameter<double>("IdealModelConstantDriftVelocity");  // 55 um/ns
   else
     theConstVDrift = 55.;
 
   // get random engine
   edm::Service<edm::RandomNumberGenerator> rng;
   if (!rng.isAvailable()) {
     throw cms::Exception("Configuration") << "RandomNumberGeneratorService for DTDigitizer missing in cfg file";
   }
 
   // MultipleLinks=false ==> one-to-one correspondence between digis and SimHits
   MultipleLinks = conf_.getParameter<bool>("MultipleLinks");
   // MultipleLinks=true ==> association of SimHits within a time window
   // LinksTimeWindow (of the order of the resolution)
   LinksTimeWindow = conf_.getParameter<double>("LinksTimeWindow");  // (10 ns)
 
   // Name of Collection used for create the XF
   mix_ = conf_.getParameter<std::string>("mixLabel");
   collection_for_XF = conf_.getParameter<std::string>("InputCollection");
   cf_token = consumes<CrossingFrame<PSimHit>>(edm::InputTag(mix_, collection_for_XF));
 
   // String to choice between ideal (the deafult) and (mis)aligned geometry for
   // the digitization step
   geometryType = conf_.getParameter<std::string>("GeometryType");
 }

Member Function Documentation

float DTDigitizer::asymGausSmear	(	double	mean,
		double	sigmaLeft,
		double	sigmaRight,
		CLHEP::HepRandomEngine *	engine
	)		const

private

Definition at line 449 of file DTDigitizer.cc.

References f, and OrderedSet::t.

Referenced by driftTimeFromParametrization().

                                                                      {
   double f = sigmaLeft / (sigmaLeft + sigmaRight);
   double t;
 
   if (CLHEP::RandFlat::shoot(engine) <= f) {
     t = CLHEP::RandGaussQ::shoot(engine, mean, sigmaLeft);
     t = mean - fabs(t - mean);
   } else {
     t = CLHEP::RandGaussQ::shoot(engine, mean, sigmaRight);
     t = mean + fabs(t - mean);
   }
   return static_cast<float>(t);
 }

pair< float, bool > DTDigitizer::computeTime	(	const DTLayer *	layer,
		const DTWireId &	wireId,
		const PSimHit *	hit,
		const LocalVector &	BLoc,
		CLHEP::HepRandomEngine *	engine
	)

private

Definition at line 231 of file DTDigitizer.cc.

References Vector3DBase< T, FrameTag >::cross(), ztail::d, debug, dumpMFGeometry_cfg::delta, DeadROC_duringRun::dir, Vector3DBase< T, FrameTag >::dot(), driftTimeFromParametrization(), driftTimeFromTimeMap(), dumpHit(), PSimHit::entryPoint(), PSimHit::exitPoint(), externalDelays(), IdealModel, PSimHit::localDirection(), PSimHit::localPosition(), M_PI, PV3DBase< T, PVType, FrameType >::mag(), PSimHit::momentumAtEntry(), DTTopology::none, DTTopology::onWhichBorder(), PSimHit::pabs(), PSimHit::particleType(), DiDispStaMuonMonitor_cfi::pt, PVValHelper::pT, DTLayer::specificTopology(), mathSSE::sqrt(), theConstVDrift, theta(), Vector3DBase< T, FrameTag >::unit(), DTWireId::wire(), DTTopology::wirePosition(), x, PV3DBase< T, PVType, FrameType >::x(), DTTopology::xMax, DTTopology::xMin, PV3DBase< T, PVType, FrameType >::y(), and PV3DBase< T, PVType, FrameType >::z().

Referenced by produce().

                                                                          {
   LocalPoint entryP = hit->entryPoint();
   LocalPoint exitP = hit->exitPoint();
   int partType = hit->particleType();
 
   const DTTopology &topo = layer->specificTopology();
 
   // Pay attention: in CMSSW the rf of the SimHit is in the layer's rf
 
   if (debug)
     LogPrint("DTDigitizer") << "Hit local entry point: " << entryP << endl << "Hit local exit point: " << exitP << endl;
 
   float xwire = topo.wirePosition(wireId.wire());
   float xEntry = entryP.x() - xwire;
   float xExit = exitP.x() - xwire;
 
   if (debug)
     LogPrint("DTDigitizer") << "wire position: " << xwire << " x entry in cell rf: " << xEntry
                             << " x exit in cell rf: " << xExit << endl;
 
   DTTopology::Side entrySide = topo.onWhichBorder(xEntry, entryP.y(), entryP.z());
   DTTopology::Side exitSide = topo.onWhichBorder(xExit, exitP.y(), exitP.z());
 
   if (debug)
     dumpHit(hit, xEntry, xExit, topo);
 
   // The bolean is used to flag the drift time computation
   pair<float, bool> driftTime(0., false);
 
   // if delta in gas->ignore, since it is included in the parametrisation.
   // FIXME: should check that it is actually a delta ray produced by a nearby
   // muon hit.
 
   if (partType == 11 && entrySide == DTTopology::none) {
     if (debug)
       LogPrint("DTDigitizer") << "    e- hit in gas; discarding " << endl;
     return driftTime;
   }
 
   float By = BLoc.y();
   float Bz = BLoc.z();
 
   // Radius and sagitta according to direction of momentum
   // (just for printing)
   // NOTE: in cmsim, d is always taken // pHat!
   LocalVector d = (exitP - entryP);
   LocalVector pHat = hit->localDirection().unit();
   LocalVector hHat = (d.cross(pHat.cross(d))).unit();
   float cosAlpha = hHat.dot(pHat);
   float sinAlpha = sqrt(1. - cosAlpha * cosAlpha);
   float radius_P = (d.mag()) / (2. * cosAlpha);
   float sagitta_P = radius_P * (1. - sinAlpha);
 
   // Radius, sagitta according to field bending
   // (just for printing)
   float halfd = d.mag() / 2.;
   float BMag = BLoc.mag();
   LocalVector pT = (pHat - (BLoc.unit() * pHat.dot(BLoc.unit()))) * (hit->pabs());
   float radius_B = (pT.mag() / (0.3 * BMag)) * 100.;
   float sagitta_B;
   if (radius_B > halfd) {
     sagitta_B = radius_B - sqrt(radius_B * radius_B - halfd * halfd);
   } else {
     sagitta_B = radius_B;
   }
 
   // cos(delta), delta= angle between direction at entry and hit segment
   // (just for printing)
   float delta = pHat.dot(d.unit());
   if (debug)
     LogPrint("DTDigitizer") << "   delta                 = " << delta << endl
                             << "   cosAlpha              = " << cosAlpha << endl
                             << "   sinAlpha              = " << sinAlpha << endl
                             << "   pMag                  = " << pT.mag() << endl
                             << "   bMag                  = " << BMag << endl
                             << "   pT                    = " << pT << endl
                             << "   halfd                 = " << halfd << endl
                             << "   radius_P  (cm)        = " << radius_P << endl
                             << "   sagitta_P (um)        = " << sagitta_P * 10000. << endl
                             << "   radius_B  (cm)        = " << radius_B << endl
                             << "   sagitta_B (um)        = " << sagitta_B * 10000. << endl;
 
   // Select cases where parametrization can not be used.
   bool noParametrisation = ((entrySide == DTTopology::none || exitSide == DTTopology::none)  // case # 2,3,8,9 or 11
                             || (entrySide == exitSide)                                       // case # 4 or 10
                             || ((entrySide == DTTopology::xMin && exitSide == DTTopology::xMax) ||
                                 (entrySide == DTTopology::xMax && exitSide == DTTopology::xMin))  // Hit is case # 7
   );
 
   // FIXME: now, debug warning only; consider treating those
   // with TM algo.
   if (delta < 0.99996  // Track is not straight. FIXME: use sagitta?
       && (noParametrisation == false)) {
     if (debug)
       LogPrint("DTDigitizer") << "*** WARNING: hit is not straight, type = " << partType << endl;
   }
 
   //************ 5A ***************
 
   if (!noParametrisation) {
     LocalVector dir = hit->momentumAtEntry();  // ex Measurement3DVector dir =
                                                // hit->measurementDirection(); //FIXME?
     float theta = atan(dir.x() / -dir.z()) * 180 / M_PI;
 
     // FIXME: use dir if M.S. is included as GARFIELD option...
     //        otherwise use hit segment dirction.
     //    LocalVector dir0 = (exitP-entryP).unit();
     //    float theta = atan(dir0.x()/-dir0.z())*180/M_PI;
     float x;
 
     Local3DPoint pt = hit->localPosition();  // ex Measurement3DPoint pt =
                                              // hit->measurementPosition(); // FIXME?
 
     if (fabs(pt.z()) < 0.002) {
       // hit center within 20 um from z=0, no need to extrapolate.
       x = pt.x() - xwire;
     } else {
       x = xEntry - (entryP.z() * (xExit - xEntry)) / (exitP.z() - entryP.z());
     }
 
     if (IdealModel)
       return make_pair(fabs(x) / theConstVDrift, true);
     else
       driftTime = driftTimeFromParametrization(x, theta, By, Bz, engine);
   }
 
   if ((driftTime.second) == false) {
     // Parametrisation not applicable, or failed. Use time map.
     driftTime = driftTimeFromTimeMap();
   }
 
   //************ 5B ***************
 
   // Signal propagation, TOF etc.
   if (driftTime.second) {
     driftTime.first += externalDelays(layer, wireId, hit);
   }
   return driftTime;
 }

pair< float, bool > DTDigitizer::driftTimeFromParametrization	(	float	x,
		float	alpha,
		float	By,
		float	Bz,
		CLHEP::HepRandomEngine *	engine
	)		const

private

Definition at line 377 of file DTDigitizer.cc.

References asymGausSmear(), debug, GeomDetEnumerators::DT, f, RemoveAddSevLevel::flag, interpolate, SiStripPI::max, DTDriftTimeParametrization::MB_DT_drift_time(), smearing, DTDriftTimeParametrization::drift_time::t_drift, DTDriftTimeParametrization::drift_time::t_width_m, DTDriftTimeParametrization::drift_time::t_width_p, theta(), and ntuplemaker::time.

Referenced by computeTime().

                                                                                   {
   // Convert from CMSSW frame/units r.f. to parametrization ones.
   x *= 10.;  // cm -> mm
 
   // FIXME: Current parametrisation can extrapolate above 21 mm,
   // however a detailed study is needed before using this.
   if (fabs(x) > 21.) {
     if (debug)
       LogPrint("DTDigitizer") << "*** WARNING: parametrisation: x out of range = " << x << ", skipping" << endl;
     return pair<float, bool>(0.f, false);
   }
 
   // Different r.f. of the parametrization:
   // X_par = X_ORCA; Y_par=Z_ORCA; Z_par = -Y_ORCA
 
   float By_par = Bz;   // Bnorm
   float Bz_par = -By;  // Bwire
   float theta_par = theta;
 
   // Parametrisation uses interpolation up to |theta|=45 deg,
   // |Bwire|=0.4, |Bnorm|=0.75; extrapolation above.
   if (fabs(theta_par) > 45.) {
     if (debug)
       LogPrint("DTDigitizer") << "*** WARNING: extrapolating theta > 45: " << theta << endl;
     // theta_par = min(fabs(theta_par),45.f)*((theta_par<0.)?-1.:1.);
   }
   if (fabs(By_par) > 0.75) {
     if (debug)
       LogPrint("DTDigitizer") << "*** WARNING: extrapolating Bnorm > 0.75: " << By_par << endl;
     // By_par = min(fabs(By_par),0.75f)*((By_par<0.)?-1.:1.);
   }
   if (fabs(Bz_par) > 0.4) {
     if (debug)
       LogPrint("DTDigitizer") << "*** WARNING: extrapolating Bwire >0.4: " << Bz_par << endl;
     // Bz_par = min(fabs(Bz_par),0.4)*((Bz_par<0.)?-1.:1.);
   }
 
   DTDriftTimeParametrization::drift_time DT;
   static const DTDriftTimeParametrization par;
   unsigned short flag = par.MB_DT_drift_time(x, theta_par, By_par, Bz_par, 0, &DT, interpolate);
 
   if (debug) {
     LogPrint("DTDigitizer") << "    Parametrisation: x, theta, Bnorm, Bwire = " << x << " " << theta_par << " "
                             << By_par << " " << Bz_par << endl
                             << "  time=" << DT.t_drift << "  sigma_m=" << DT.t_width_m << "  sigma_p=" << DT.t_width_p
                             << endl;
     if (flag != 1) {
       LogPrint("DTDigitizer") << "*** WARNING: call to parametrisation failed" << endl;
       return pair<float, bool>(0.f, false);
     }
   }
 
   // Double half-gaussian smearing
   float time = asymGausSmear(DT.t_drift, DT.t_width_m, DT.t_width_p, engine);
 
   // Do not allow the smearing to lead to negative values
   time = max(time, 0.f);
 
   // Apply a Gaussian smearing to account for electronic effects (cf. 2004 TB
   // analysis) The width of the Gaussian can be configured with the "Smearing"
   // parameter
 
   double u = CLHEP::RandGaussQ::shoot(engine, 0., smearing);
   time += u;
 
   if (debug)
     LogPrint("DTDigitizer") << "  drift time = " << time << endl;
 
   return pair<float, bool>(time, true);
 }

pair< float, bool > DTDigitizer::driftTimeFromTimeMap ( ) const

private

Definition at line 466 of file DTDigitizer.cc.

References debug.

Referenced by computeTime().

                                                           {
   // FIXME: not yet implemented.
   if (debug)
     LogPrint("DTDigitizer") << "   TimeMap " << endl;
   return pair<float, bool>(0., false);
 }

void DTDigitizer::dumpHit	(	const PSimHit *	hit,
		float	xEntry,
		float	xExit,
		const DTTopology &	topo
	)

private

Definition at line 567 of file DTDigitizer.cc.

References DTTopology::cellHeight(), DTTopology::cellLenght(), DTTopology::cellWidth(), PSimHit::energyLoss(), PSimHit::entryPoint(), PSimHit::exitPoint(), createfilelist::int, mag(), PSimHit::momentumAtEntry(), DTTopology::onWhichBorder(), PSimHit::pabs(), PSimHit::particleType(), PSimHit::processType(), PSimHit::trackId(), Vector3DBase< T, FrameTag >::unit(), x, PV3DBase< T, PVType, FrameType >::y(), and PV3DBase< T, PVType, FrameType >::z().

Referenced by computeTime().

                                                                                                {
   LocalPoint entryP = hit->entryPoint();
   LocalPoint exitP = hit->exitPoint();
 
   DTTopology::Side entrySide = topo.onWhichBorder(xEntry, entryP.y(), entryP.z());
   DTTopology::Side exitSide = topo.onWhichBorder(xExit, exitP.y(), exitP.z());
   //  ProcessTypeEnumerator pTypes;
 
   LogPrint("DTDigitizer") << endl
                           << "------- SimHit: " << endl
                           << "   Particle type         = " << hit->particleType() << endl
                           << "   process type          = " << hit->processType() << endl
                           << "   process type          = " << hit->processType()
                           << endl
                           // << "   packedTrackId         = " << hit->packedTrackId() << endl
                           << "   trackId               = " << hit->trackId()
                           << endl  // new,is the same as the
                                    // previous?? FIXME-Check
                           << "   |p|                   = " << hit->pabs() << endl
                           << "   Energy loss           = " << hit->energyLoss()
                           << endl
                           // << "   timeOffset            = " << hit->timeOffset() << endl
                           // << "   measurementPosition   = " << hit->measurementPosition() << endl
                           // << "   measurementDirection  = " << hit->measurementDirection() << endl
                           // //FIXME
                           << "   localDirection        = " << hit->momentumAtEntry().unit()
                           << endl  // FIXME is it a versor?
                           << "   Entry point           = " << entryP << " cell x = " << xEntry << endl
                           << "   Exit point            = " << exitP << " cell x = " << xExit << endl
                           << "   DR =                  = " << (exitP - entryP).mag() << endl
                           << "   Dx =                  = " << (exitP - entryP).x() << endl
                           << "   Cell w,h,l            = (" << topo.cellWidth() << " , " << topo.cellHeight() << " , "
                           << topo.cellLenght() << ") cm" << endl
                           << "   DY entry from edge    = " << topo.cellLenght() / 2. - fabs(entryP.y())
                           << "   DY exit  from edge    = " << topo.cellLenght() / 2. - fabs(exitP.y())
                           << "   entrySide = " << (int)entrySide << " ; exitSide = " << (int)exitSide << endl;
 }

float DTDigitizer::externalDelays	(	const DTLayer *	layer,
		const DTWireId &	wireId,
		const PSimHit *	hit
	)		const

private

Definition at line 475 of file DTDigitizer.cc.

References DTTopology::cellLenght(), debug, PSimHit::localPosition(), DTLayer::specificTopology(), theSync, PSimHit::tof(), vPropWire, and PV3DBase< T, PVType, FrameType >::y().

Referenced by computeTime().

                                                                                                         {
   // Time of signal propagation along wire.
 
   float wireCoord = hit->localPosition().y();
   float halfL = (layer->specificTopology().cellLenght()) / 2.;
   float propgL = halfL - wireCoord;  // the FE is always located at the pos coord.
 
   float propDelay = propgL / vPropWire;
 
   // Real TOF.
   float tof = hit->tof();
 
   // Delays and t0 according to theSync
 
   double sync = theSync->digitizerOffset(&wireId, layer);
 
   if (debug) {
     LogPrint("DTDigitizer") << "    propDelay =" << propDelay << "; TOF=" << tof << "; sync= " << sync << endl;
   }
 
   return propDelay + tof + sync;
 }

void DTDigitizer::produce	(	edm::Event &	iEvent,
		const edm::EventSetup &	iSetup
	)

override

Definition at line 134 of file DTDigitizer.cc.

References cf_token, computeTime(), debug, edm::EventID::event(), geometryType, edm::EventSetup::get(), edm::Event::getByToken(), edm::RandomNumberGenerator::getEngine(), edm::EventBase::id(), MagneticField::inTesla(), DTGeometry::layer(), DTWireId::layerId(), eostools::move(), convertSQLitetoXML_cfg::output, edm::Handle< T >::product(), edm::Event::put(), edm::EventID::run(), rpcPointValidation_cfi::simHit, FastTrackerRecHitCombiner_cfi::simHits, storeDigis(), edm::Event::streamID(), GeomDet::surface(), ntuplemaker::time, Surface::toGlobal(), and GloballyPositioned< T >::toLocal().

                                                                  {
   edm::Service<edm::RandomNumberGenerator> rng;
   CLHEP::HepRandomEngine *engine = &rng->getEngine(iEvent.streamID());
 
   if (debug)
     LogPrint("DTDigitizer") << "--- Run: " << iEvent.id().run() << " Event: " << iEvent.id().event() << endl;
 
   //************ 1 ***************
   // create the container for the SimHits
   //  Handle<PSimHitContainer> simHits;
   //  iEvent.getByLabel("g4SimHits","MuonDTHits",simHits);
 
   // use MixCollection instead of the previous
   Handle<CrossingFrame<PSimHit>> xFrame;
   iEvent.getByToken(cf_token, xFrame);
 
   unique_ptr<MixCollection<PSimHit>> simHits(new MixCollection<PSimHit>(xFrame.product()));
 
   // create the pointer to the Digi container
   unique_ptr<DTDigiCollection> output(new DTDigiCollection());
   // pointer to the DigiSimLink container
   unique_ptr<DTDigiSimLinkCollection> outputLinks(new DTDigiSimLinkCollection());
 
   // Muon Geometry
   ESHandle<DTGeometry> muonGeom;
   iSetup.get<MuonGeometryRecord>().get(geometryType, muonGeom);
 
   // Magnetic Field
   ESHandle<MagneticField> magnField;
   iSetup.get<IdealMagneticFieldRecord>().get(magnField);
 
   //************ 2 ***************
 
   // These are sorted by DetId, i.e. by layer and then by wire #
   //  map<DTDetId, vector<const PSimHit*> > wireMap;
   DTWireIdMap wireMap;
 
   for (MixCollection<PSimHit>::MixItr simHit = simHits->begin(); simHit != simHits->end(); simHit++) {
     // Create the id of the wire, the simHits in the DT known also the wireId
 
     DTWireId wireId((*simHit).detUnitId());
     // Fill the map
     wireMap[wireId].push_back(&(*simHit));
   }
 
   pair<float, bool> time(0., false);
 
   //************ 3 ***************
   // Loop over the wires
   for (DTWireIdMapConstIter wire = wireMap.begin(); wire != wireMap.end(); wire++) {
     // SimHit Container associated to the wire
     const vector<const PSimHit *> &vhit = (*wire).second;
     if (!vhit.empty()) {
       TDContainer tdCont;  // It is a vector<pair<const PSimHit*,float> >;
 
       //************ 4 ***************
       DTWireId wireId = (*wire).first;
 
       // const DTLayer* layer = dynamic_cast< const DTLayer* >
       // (muonGeom->idToDet(wireId.layerId()));
       const DTLayer *layer = muonGeom->layer(wireId.layerId());
 
       // Loop on the hits of this wire
       for (vector<const PSimHit *>::const_iterator hit = vhit.begin(); hit != vhit.end(); hit++) {
         //************ 5 ***************
         LocalPoint locPos = (*hit)->localPosition();
 
         const LocalVector BLoc = layer->surface().toLocal(magnField->inTesla(layer->surface().toGlobal(locPos)));
 
         time = computeTime(layer, wireId, *hit, BLoc, engine);
 
         //************ 6 ***************
         if (time.second) {
           tdCont.push_back(make_pair((*hit), time.first));
         } else {
           if (debug)
             LogPrint("DTDigitizer") << "hit discarded" << endl;
         }
       }
 
       //************ 7 ***************
 
       // the loading must be done by layer but
       // the digitization must be done by wire (in order to take into account
       // the dead time)
 
       storeDigis(wireId, tdCont, *output, *outputLinks);
     }
   }
 
   //************ 8 ***************
   // Load the Digi Container in the Event
   // iEvent.put(std::move(output),"MuonDTDigis");
   iEvent.put(std::move(output));
   iEvent.put(std::move(outputLinks));
 }

void DTDigitizer::storeDigis	(	DTWireId &	wireId,
		TDContainer &	hits,
		DTDigiCollection &	output,
		DTDigiSimLinkCollection &	outputLinks
	)

private

Definition at line 500 of file DTDigitizer.cc.

References funct::abs(), base, deadTime, debug, MuonDigiCollection< IndexType, DigiType >::insertDigi(), DTWireId::layerId(), LinksTimeWindow, MultipleLinks, DTDigi::number(), onlyMuHits, DTDigi::time(), ntuplemaker::time, and DTWireId::wire().

Referenced by produce().

                                                                    {
   //************ 7A ***************
 
   // sort signal times
   sort(hits.begin(), hits.end(), hitLessT());
 
   //************ 7B ***************
 
   float wakeTime = -999999.0;
   float resolTime = -999999.0;
   int digiN = -1;  // Digi identifier within the cell (for multiple digis)
   DTDigi digi;
 
   // loop over signal times and drop signals inside dead time
   for (TDContainer::const_iterator hit = hits.begin(); hit != hits.end(); hit++) {
     if (onlyMuHits && abs((*hit).first->particleType()) != 13)
       continue;
 
     //************ 7C ***************
 
     float time = (*hit).second;
     if (time > wakeTime) {
       // Note that digi is constructed with a float value (in ns)
       int wireN = wireId.wire();
       digiN++;
       digi = DTDigi(wireN, time, digiN, base);
 
       // Add association between THIS digi and the corresponding SimTrack
       unsigned int SimTrackId = (*hit).first->trackId();
       EncodedEventId evId = (*hit).first->eventId();
       DTDigiSimLink digisimLink(wireN, digiN, time, SimTrackId, evId, base);
 
       if (debug) {
         LogPrint("DTDigitizer") << endl << "---- DTDigitizer ----" << endl;
         LogPrint("DTDigitizer") << "wireId: " << wireId << endl;
         LogPrint("DTDigitizer") << "sim. time = " << time << endl;
         LogPrint("DTDigitizer") << "digi number = " << digi.number() << ", digi time = " << digi.time()
                                 << ", linked to SimTrack Id = " << SimTrackId << endl;
       }
 
       //************ 7D ***************
       DTLayerId layerID = wireId.layerId();  // taking the layer of the wire
       output.insertDigi(layerID, digi);      // ordering Digis by layer
       outputLinks.insertDigi(layerID, digisimLink);
       wakeTime = time + deadTime;
       resolTime = time + LinksTimeWindow;
     } else if (MultipleLinks && time < resolTime) {
       int wireN = wireId.wire();
       unsigned int SimTrackId = (*hit).first->trackId();
       EncodedEventId evId = (*hit).first->eventId();
       DTDigiSimLink digisimLink(wireN, digiN, time, SimTrackId, evId, base);
       DTLayerId layerID = wireId.layerId();
       outputLinks.insertDigi(layerID, digisimLink);
 
       if (debug) {
         LogPrint("DTDigitizer") << "\nAdded multiple link: \n"
                                 << "digi number = " << digi.number() << ", digi time = " << digi.time()
                                 << " (sim. time = " << time << ")"
                                 << ", linked to SimTrack Id = " << SimTrackId << endl;
       }
     }
   }
 }