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DTDigitizer Class Reference

#include <DTDigitizer.h>

Inheritance diagram for DTDigitizer:
edm::EDProducer edm::ProducerBase edm::ProductRegistryHelper

List of all members.

Classes

struct  hitLessT

Public Member Functions

 DTDigitizer (const edm::ParameterSet &)
virtual void produce (edm::Event &, const edm::EventSetup &)
 ~DTDigitizer ()

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< hitAndTTDContainer

Private Member Functions

float asymGausSmear (double mean, double sigmaLeft, double sigmaRight) const
std::pair< float, bool > computeTime (const DTLayer *layer, const DTWireId &wireId, const PSimHit *hit, const LocalVector &BLoc)
std::pair< float, bool > driftTimeFromParametrization (float x, float alpha, float By, float Bz) 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

std::string collection_for_XF
float deadTime
bool debug
std::string geometryType
bool IdealModel
bool interpolate
float LinksTimeWindow
bool MultipleLinks
bool onlyMuHits
float smearing
std::string syncName
float theConstVDrift
CLHEP::RandFlat * theFlatDistribution
CLHEP::RandGaussQ * theGaussianDistribution
DTDigiSyncBasetheSync
double vPropWire

Friends

class DTDigitizerAnalysis

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.

Date:
2008/07/01 07:41:35
Revision:
1.12
Authors:
: G. Bevilacqua, N. Amapane, G. Cerminara, R. Bellan

Definition at line 39 of file DTDigitizer.h.


Member Typedef Documentation

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

Definition at line 51 of file DTDigitizer.h.

typedef DTWireIdMap::const_iterator DTDigitizer::DTWireIdMapConstIter [private]

Definition at line 53 of file DTDigitizer.h.

typedef DTWireIdMap::iterator DTDigitizer::DTWireIdMapIter [private]

Definition at line 52 of file DTDigitizer.h.

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

Definition at line 48 of file DTDigitizer.h.

typedef std::vector<hitAndT> DTDigitizer::TDContainer [private]

Definition at line 49 of file DTDigitizer.h.


Constructor & Destructor Documentation

DTDigitizer::DTDigitizer ( const edm::ParameterSet conf_) [explicit]

Definition at line 63 of file DTDigitizer.cc.

References gather_cfg::cout, debug, Exception, reco::get(), edm::ParameterSet::getParameter(), edm::ParameterSet::getUntrackedParameter(), edm::Service< T >::isAvailable(), and AlCaHLTBitMon_QueryRunRegistry::string.

                                                  {
  
  // Set verbose output
  debug=conf_.getUntrackedParameter<bool>("debug"); 
    
  if (debug) cout<<"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.

  // Sync Algo
  syncName = conf_.getParameter<string>("SyncName");
  theSync = DTDigiSyncFactory::get()->create(syncName,conf_.getParameter<ParameterSet>("pset"));

  // 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");

  // 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";
  }
  theGaussianDistribution = new CLHEP::RandGaussQ(rng->getEngine()); 
  theFlatDistribution = new CLHEP::RandFlat(rng->getEngine(), 0, 1); 

  // 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 
  collection_for_XF = conf_.getParameter<std::string>("InputCollection");

  //String to choice between ideal (the deafult) and (mis)aligned geometry for the digitization step 
  geometryType = conf_.getParameter<std::string>("GeometryType");
}
DTDigitizer::~DTDigitizer ( )

Definition at line 132 of file DTDigitizer.cc.


Member Function Documentation

float DTDigitizer::asymGausSmear ( double  mean,
double  sigmaLeft,
double  sigmaRight 
) const [private]

Definition at line 447 of file DTDigitizer.cc.

References f, and lumiQTWidget::t.

                                                                                       {

  double f = sigmaLeft/(sigmaLeft+sigmaRight);
  double t;

  if (theFlatDistribution->fire() <= f) {
    t = theGaussianDistribution->fire(mean,sigmaLeft);
    t = mean - fabs(t - mean);
  } else {
    t = theGaussianDistribution->fire(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 
) [private]

Definition at line 236 of file DTDigitizer.cc.

References gather_cfg::cout, Vector3DBase< T, FrameTag >::cross(), debug, delta, dir, Vector3DBase< T, FrameTag >::dot(), PSimHit::entryPoint(), PSimHit::exitPoint(), PSimHit::localDirection(), PSimHit::localPosition(), M_PI, PV3DBase< T, PVType, FrameType >::mag(), PSimHit::momentumAtEntry(), none, DTTopology::none, DTTopology::onWhichBorder(), PSimHit::pabs(), PSimHit::particleType(), DTLayer::specificTopology(), mathSSE::sqrt(), theta(), Vector3DBase< T, FrameTag >::unit(), DTWireId::wire(), DTTopology::wirePosition(), PV3DBase< T, PVType, FrameType >::x(), x, DTTopology::xMax, DTTopology::xMin, PV3DBase< T, PVType, FrameType >::y(), and PV3DBase< T, PVType, FrameType >::z().

                                                                                      { 
 
  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)  cout<<"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) cout<<"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) cout << "    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) cout << "   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) cout << "*** 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);

  }

 
  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 
) const [private]

Definition at line 376 of file DTDigitizer.cc.

References gather_cfg::cout, debug, GeomDetEnumerators::DT, f, edm::max(), DTDriftTimeParametrization::MB_DT_drift_time(), DTDriftTimeParametrization::drift_time::t_drift, DTDriftTimeParametrization::drift_time::t_width_m, DTDriftTimeParametrization::drift_time::t_width_p, theta(), and cond::rpcobgas::time.

                                                                                                         {

  // 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) cout << "*** 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) cout << "*** 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) cout << "*** 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) cout << "*** 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 DTDriftTimeParametrization par;
  unsigned short flag = par.MB_DT_drift_time (x, theta_par, By_par, Bz_par, 0, &DT, interpolate);

  if (debug) {
    cout << "    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) {
      cout << "*** 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);

  // 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 = theGaussianDistribution->fire(0.,smearing);
  time += u;

  if (debug) cout << "  drift time = " << time << endl;
  
  return pair<float,bool>(time,true); 
}
pair< float, bool > DTDigitizer::driftTimeFromTimeMap ( ) const [private]

Definition at line 462 of file DTDigitizer.cc.

References gather_cfg::cout, and debug.

                                                         {
  // FIXME: not yet implemented.
  if (debug) cout << "   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 577 of file DTDigitizer.cc.

References DTTopology::cellHeight(), DTTopology::cellLenght(), DTTopology::cellWidth(), gather_cfg::cout, PSimHit::energyLoss(), PSimHit::entryPoint(), PSimHit::exitPoint(), 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().

                                                  {
  
  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;
  
  cout << 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 470 of file DTDigitizer.cc.

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

                                                            {
  
  // 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) {
    cout << "    propDelay =" << propDelay
         << "; TOF=" << tof
         << "; sync= " << sync
         << endl;
  }
  
  return propDelay + tof + sync;
}
void DTDigitizer::produce ( edm::Event iEvent,
const edm::EventSetup iSetup 
) [virtual]

Implements edm::EDProducer.

Definition at line 138 of file DTDigitizer.cc.

References MixCollection< T >::begin(), gather_cfg::cout, debug, edm::EventID::event(), edm::EventSetup::get(), edm::Event::getByLabel(), edm::EventBase::id(), DTWireId::layerId(), convertSQLitetoXML_cfg::output, edm::Handle< T >::product(), edm::Event::put(), edm::EventID::run(), trackerHits::simHits, GeomDet::surface(), cond::rpcobgas::time, Surface::toGlobal(), GloballyPositioned< T >::toLocal(), and createXMLFile::wire.

                                                                {
  if(debug)
    cout << "--- 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.getByLabel("mix",collection_for_XF,xFrame);
  
  auto_ptr<MixCollection<PSimHit> > 
    simHits( new MixCollection<PSimHit>(xFrame.product()) );

   // create the pointer to the Digi container
  auto_ptr<DTDigiCollection> output(new DTDigiCollection());
   // pointer to the DigiSimLink container
  auto_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.size()!=0) {
      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); 

        //************ 6 ***************
        if (time.second) {
          tdCont.push_back(make_pair((*hit),time.first));
        } else {
          if (debug) cout << "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(output,"MuonDTDigis");
  iEvent.put(output);
  iEvent.put(outputLinks);

}
void DTDigitizer::storeDigis ( DTWireId wireId,
TDContainer hits,
DTDigiCollection output,
DTDigiSimLinkCollection outputLinks 
) [private]

Definition at line 503 of file DTDigitizer.cc.

References abs, DTDigi::countsTDC(), gather_cfg::cout, debug, MuonDigiCollection< IndexType, DigiType >::insertDigi(), DTWireId::layerId(), DTDigi::number(), funct::pow(), python::multivaluedict::sort(), cond::rpcobgas::time, DTDigi::time(), and DTWireId::wire().

                                                                                            {

  //************ 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);

      // 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);

      if(debug) {
        cout<<endl<<"---- DTDigitizer ----"<<endl;
        cout<<"wireId: "<<wireId<<endl;
        cout<<"sim. time = "<<time<<endl;
        cout<<"digi number = "<< digi.number()<<", digi time = "<<digi.time()
            <<", linked to SimTrack Id = "<<SimTrackId<<endl;
      }

      //************ 7D ***************
      if(digi.countsTDC() < pow(2.,16)){
        DTLayerId layerID = wireId.layerId();  //taking the layer in which reside the wire
        output.insertDigi(layerID, digi); // ordering Digis by layer
        outputLinks.insertDigi(layerID, digisimLink);
        wakeTime = time + deadTime;
        resolTime = time + LinksTimeWindow;
      } 
      else {
        digiN--;
      }
    }
    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);
      DTLayerId layerID = wireId.layerId(); 
      outputLinks.insertDigi(layerID, digisimLink);

      if(debug) { 
        cout<<"\nAdded multiple link: \n"
            <<"digi number = "<<digi.number()<<", digi time = "<<digi.time()<<" (sim. time = "<<time<<")"
            <<", linked to SimTrack Id = "<<SimTrackId<<endl;
      }
    }
  }
  
}

Friends And Related Function Documentation

friend class DTDigitizerAnalysis [friend]

Definition at line 98 of file DTDigitizer.h.


Member Data Documentation

std::string DTDigitizer::collection_for_XF [private]

Definition at line 126 of file DTDigitizer.h.

float DTDigitizer::deadTime [private]

Definition at line 102 of file DTDigitizer.h.

bool DTDigitizer::debug [private]

Definition at line 104 of file DTDigitizer.h.

std::string DTDigitizer::geometryType [private]

Definition at line 111 of file DTDigitizer.h.

bool DTDigitizer::IdealModel [private]

Definition at line 114 of file DTDigitizer.h.

bool DTDigitizer::interpolate [private]

Definition at line 105 of file DTDigitizer.h.

Definition at line 123 of file DTDigitizer.h.

Definition at line 122 of file DTDigitizer.h.

bool DTDigitizer::onlyMuHits [private]

Definition at line 106 of file DTDigitizer.h.

float DTDigitizer::smearing [private]

Definition at line 103 of file DTDigitizer.h.

std::string DTDigitizer::syncName [private]

Definition at line 108 of file DTDigitizer.h.

float DTDigitizer::theConstVDrift [private]

Definition at line 115 of file DTDigitizer.h.

CLHEP::RandFlat* DTDigitizer::theFlatDistribution [private]

Definition at line 119 of file DTDigitizer.h.

CLHEP::RandGaussQ* DTDigitizer::theGaussianDistribution [private]

Definition at line 118 of file DTDigitizer.h.

Definition at line 109 of file DTDigitizer.h.

double DTDigitizer::vPropWire [private]

Definition at line 101 of file DTDigitizer.h.