#include <RPCSimParam.h>

Inheritance diagram for RPCSimParam:

Public Member Functions
	RPCSimParam (const edm::ParameterSet &config)
void	setRandomEngine (CLHEP::HepRandomEngine &eng)
void	simulate (const RPCRoll *roll, const edm::PSimHitContainer &rpcHits)
void	simulateNoise (const RPCRoll *)
	~RPCSimParam ()
Private Member Functions
void	init ()
Private Attributes
RPCSynchronizer *	_rpcSync
double	aveCls
double	aveEff
double	dtimCs
CLHEP::RandFlat *	flatDistribution1
CLHEP::RandFlat *	flatDistribution2
CLHEP::RandFlat *	flatDistribution_
double	gate
double	lbGate
int	N_hits
int	nbxing
CLHEP::RandPoissonQ *	poissonDistribution
double	rate
double	resEle
double	resRPC
bool	rpcdigiprint
double	sspeed
double	timOff

Detailed Description

Class for the RPC strip response simulation based on a parametrized model (ORCA-based)

Author:: Marcello Maggi -- INFN Bari

Definition at line 22 of file RPCSimParam.h.

Constructor & Destructor Documentation

RPCSimParam::RPCSimParam ( const edm::ParameterSet & config )

Definition at line 19 of file RPCSimParam.cc.

References _rpcSync, aveCls, aveEff, gather_cfg::cout, dtimCs, gate, edm::ParameterSet::getParameter(), lbGate, nbxing, rate, resEle, resRPC, rpcdigiprint, sspeed, and timOff.

                                                      : RPCSim(config){
  aveEff = config.getParameter<double>("averageEfficiency");
  aveCls = config.getParameter<double>("averageClusterSize");
  resRPC = config.getParameter<double>("timeResolution");
  timOff = config.getParameter<double>("timingRPCOffset");
  dtimCs = config.getParameter<double>("deltatimeAdjacentStrip");
  resEle = config.getParameter<double>("timeJitter");
  sspeed = config.getParameter<double>("signalPropagationSpeed");
  lbGate = config.getParameter<double>("linkGateWidth");
  rpcdigiprint = config.getParameter<bool>("printOutDigitizer");

  rate=config.getParameter<double>("Rate");
  nbxing=config.getParameter<int>("Nbxing");
  gate=config.getParameter<double>("Gate");

  if (rpcdigiprint) {
    std::cout <<"Average Efficiency        = "<<aveEff<<std::endl;
    std::cout <<"Average Cluster Size      = "<<aveCls<<" strips"<<std::endl;
    std::cout <<"RPC Time Resolution       = "<<resRPC<<" ns"<<std::endl;
    std::cout <<"RPC Signal formation time = "<<timOff<<" ns"<<std::endl;
    std::cout <<"RPC adjacent strip delay  = "<<dtimCs<<" ns"<<std::endl;
    std::cout <<"Electronic Jitter         = "<<resEle<<" ns"<<std::endl;
    std::cout <<"Signal propagation time   = "<<sspeed<<" x c"<<std::endl;
    std::cout <<"Link Board Gate Width     = "<<lbGate<<" ns"<<std::endl;
  }

  _rpcSync = new RPCSynchronizer(config);
}

RPCSimParam::~RPCSimParam ( )

Definition at line 57 of file RPCSimParam.cc.

References _rpcSync, flatDistribution1, flatDistribution2, flatDistribution_, and poissonDistribution.

                         {
  delete flatDistribution_;
  delete flatDistribution1;  
  delete flatDistribution2;   
  delete poissonDistribution; 
  delete _rpcSync;
}

Member Function Documentation

void RPCSimParam::init ( void ) [inline, private, virtual]

Implements RPCSim.

Definition at line 36 of file RPCSimParam.h.

{};

void RPCSimParam::setRandomEngine ( CLHEP::HepRandomEngine & eng ) [virtual]

Implements RPCSim.

Definition at line 48 of file RPCSimParam.cc.

References _rpcSync, flatDistribution1, flatDistribution2, flatDistribution_, poissonDistribution, and RPCSynchronizer::setRandomEngine().

                                                          {
  flatDistribution_ = new CLHEP::RandFlat(eng);
  flatDistribution1 = new CLHEP::RandFlat(eng);                     
  flatDistribution2 = new CLHEP::RandFlat(eng);                                                                                                                                                         
  poissonDistribution = new CLHEP::RandPoissonQ(eng); 
  _rpcSync->setRandomEngine(eng);
}

void RPCSimParam::simulate	(	const RPCRoll *	roll,
		const edm::PSimHitContainer &	rpcHits
	)		`[virtual]`

Implements RPCSim.

Definition at line 67 of file RPCSimParam.cc.

References _rpcSync, aveCls, aveEff, RPCRoll::centreOfStrip(), edm::DetSet< T >::clear(), flatDistribution_, RPCSim::getRPCSimSetUp(), RPCSynchronizer::getSimHitBx(), i, RPCRoll::id(), funct::log(), RPCRoll::nstrips(), DetId::rawId(), RPCSynchronizer::setRPCSimSetUp(), RPCRoll::specs(), RPCSim::strips, RPCSim::theDetectorHitMap, RPCSim::theRpcDigiSimLinks, RPCRollSpecs::topology(), and PV3DBase< T, PVType, FrameType >::x().

{
  _rpcSync->setRPCSimSetUp(getRPCSimSetUp());
  theRpcDigiSimLinks.clear();
  theDetectorHitMap.clear();
  theRpcDigiSimLinks = RPCDigiSimLinks(roll->id().rawId());

  const Topology& topology=roll->specs()->topology();

  for (edm::PSimHitContainer::const_iterator _hit = rpcHits.begin();
       _hit != rpcHits.end(); ++_hit){

    // Here I hould check if the RPC are up side down;
    const LocalPoint& entr=_hit->entryPoint();
    int time_hit = _rpcSync->getSimHitBx(&(*_hit));

    // Effinciecy
    float eff = flatDistribution_->fire(1);
    if (eff < aveEff) {

      int centralStrip = topology.channel(entr)+1;  
      int fstrip=centralStrip;
      int lstrip=centralStrip;
      // Compute the cluster size
      double w = flatDistribution_->fire(1);
      if (w < 1.e-10) w=1.e-10;
      int clsize = static_cast<int>( -1.*aveCls*log(w)+1.);
      std::vector<int> cls;
      cls.push_back(centralStrip);
      if (clsize > 1){
        for (int cl = 0; cl < (clsize-1)/2; cl++)
          if (centralStrip - cl -1 >= 1  ){
            fstrip = centralStrip-cl-1;
            cls.push_back(fstrip);
          }
        for (int cl = 0; cl < (clsize-1)/2; cl++)
          if (centralStrip + cl + 1 <= roll->nstrips() ){
            lstrip = centralStrip+cl+1;
            cls.push_back(lstrip);
          }
        if (clsize%2 == 0 ){
          // insert the last strip according to the 
          // simhit position in the central strip 
          double deltaw=roll->centreOfStrip(centralStrip).x()-entr.x();
          if (deltaw<0.) {
            if (lstrip < roll->nstrips() ){
              lstrip++;
              cls.push_back(lstrip);
            }
          }else{
            if (fstrip > 1 ){
              fstrip--;
              cls.push_back(fstrip);
            }
          }
        }
      }

      for (std::vector<int>::iterator i=cls.begin(); i!=cls.end();i++){
        // Check the timing of the adjacent strip
        std::pair<unsigned int, int> digi(*i,time_hit);

        theDetectorHitMap.insert(DetectorHitMap::value_type(digi,&(*_hit)));
        strips.insert(digi);
      }
    }
  }
}

void RPCSimParam::simulateNoise ( const RPCRoll * roll ) [virtual]

Implements RPCSim.

Definition at line 138 of file RPCSimParam.cc.

References compareJSON::const, flatDistribution1, flatDistribution2, gate, i, RPCRoll::id(), TrapezoidalStripTopology::localPosition(), RectangularStripTopology::localPosition(), N_hits, nbxing, RPCRoll::nstrips(), poissonDistribution, rate, RPCDetId::region(), strip(), RectangularStripTopology::stripLength(), TrapezoidalStripTopology::stripLength(), RPCSim::strips, RPCRoll::topology(), and x.

{

  RPCDetId rpcId = roll->id();
  int nstrips = roll->nstrips();
  double area = 0.0;
  
  if ( rpcId.region() == 0 )
    {
      const RectangularStripTopology* top_ = dynamic_cast<const
        RectangularStripTopology*>(&(roll->topology()));
      float xmin = (top_->localPosition(0.)).x();
      float xmax = (top_->localPosition((float)roll->nstrips())).x();
      float striplength = (top_->stripLength());
      area = striplength*(xmax-xmin);
    }
  else
    {
      const TrapezoidalStripTopology* top_=dynamic_cast<const TrapezoidalStripTopology*>(&(roll->topology()));
      float xmin = (top_->localPosition(0.)).x();
      float xmax = (top_->localPosition((float)roll->nstrips())).x();
      float striplength = (top_->stripLength());
      area = striplength*(xmax-xmin);
    }

  double ave = rate*nbxing*gate*area*1.0e-9;
  
  N_hits = poissonDistribution->fire(ave);

  for (int i = 0; i < N_hits; i++ ){   
    int strip = static_cast<int>(flatDistribution1->fire(1,nstrips));
    int time_hit;
    time_hit = (static_cast<int>(flatDistribution2->fire((nbxing*gate)/gate))) - nbxing/2;
    std::pair<int, int> digi(strip,time_hit);
    strips.insert(digi);
  }

}