EcalHitResponse.cc

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#include "SimCalorimetry/EcalSimAlgos/interface/EcalHitResponse.h" 
#include "SimCalorimetry/CaloSimAlgos/interface/CaloVSimParameterMap.h"
#include "SimCalorimetry/CaloSimAlgos/interface/CaloSimParameters.h"
#include "SimCalorimetry/CaloSimAlgos/interface/CaloVShape.h"
#include "SimCalorimetry/CaloSimAlgos/interface/CaloVHitCorrection.h"
#include "SimCalorimetry/CaloSimAlgos/interface/CaloVHitFilter.h"
#include "SimCalorimetry/CaloSimAlgos/interface/CaloVPECorrection.h"
#include "Geometry/CaloGeometry/interface/CaloGenericDetId.h"
#include "Geometry/CaloGeometry/interface/CaloSubdetectorGeometry.h"
#include "Geometry/CaloGeometry/interface/CaloCellGeometry.h"
#include "CalibCalorimetry/EcalLaserCorrection/interface/EcalLaserDbService.h"
#include "DataFormats/EcalDetId/interface/ESDetId.h"
#include "CLHEP/Random/RandPoissonQ.h"
#include "FWCore/Utilities/interface/isFinite.h"

#include "CLHEP/Units/GlobalPhysicalConstants.h"
#include "CLHEP/Units/GlobalSystemOfUnits.h" 
#include <iostream>



EcalHitResponse::EcalHitResponse( const CaloVSimParameterMap* parameterMap ,
                  const CaloVShape*           shape         ) :
   m_parameterMap    ( parameterMap ) ,
   m_shape           ( shape        ) ,
   m_hitCorrection   ( 0            ) ,
   m_PECorrection    ( 0            ) ,
   m_hitFilter       ( 0            ) ,
   m_geometry        ( 0            ) ,
   m_lasercals       ( 0            ) ,
   m_minBunch        ( -32          ) ,
   m_maxBunch        (  10          ) ,
   m_phaseShift      ( 1            ) ,
   m_iTime           ( 0            ) ,
   m_useLCcorrection ( 0            )  
{
}

EcalHitResponse::~EcalHitResponse()
{
}

const CaloSimParameters*
EcalHitResponse::params( const DetId& detId ) const
{
   assert( 0 != m_parameterMap ) ;
   return &m_parameterMap->simParameters( detId ) ;
}

const CaloVShape*
EcalHitResponse::shape() const
{
   assert( 0 != m_shape ) ;
   return m_shape ;
}

const CaloSubdetectorGeometry*
EcalHitResponse::geometry() const
{
   assert( 0 != m_geometry ) ;
   return m_geometry ;
}

void 
EcalHitResponse::setBunchRange( int minBunch , 
                int maxBunch  ) 
{
   m_minBunch = minBunch ;
   m_maxBunch = maxBunch ;
}

void 
EcalHitResponse::setGeometry( const CaloSubdetectorGeometry* geometry )
{
   m_geometry = geometry ;
}

void 
EcalHitResponse::setPhaseShift( double phaseShift )
{
   m_phaseShift = phaseShift ;
}

double
EcalHitResponse::phaseShift() const
{
   return m_phaseShift ;
}

void 
EcalHitResponse::setHitFilter( const CaloVHitFilter* filter)
{
   m_hitFilter = filter ;
}

void 
EcalHitResponse::setHitCorrection( const CaloVHitCorrection* hitCorrection)
{
   m_hitCorrection = hitCorrection ;
}

void 
EcalHitResponse::setPECorrection( const CaloVPECorrection* peCorrection )
{
   m_PECorrection = peCorrection ;
}

void
EcalHitResponse::setEventTime(const edm::TimeValue_t& iTime)
{
  m_iTime = iTime;
  //clear the laser cache for each event time
  CalibCache().swap(m_laserCalibCache);  
}

void 
EcalHitResponse::setLaserConstants(const EcalLaserDbService* laser, bool& useLCcorrection)
{
  m_lasercals = laser;
  m_useLCcorrection = useLCcorrection;
}

void 
EcalHitResponse::blankOutUsedSamples()  // blank out previously used elements
{
   const unsigned int size ( m_index.size() ) ;

   for( unsigned int i ( 0 ) ; i != size ; ++i )
   {
      vSamAll( m_index[i] )->setZero() ;
   }
   m_index.erase( m_index.begin() ,    // done and make ready to start over
          m_index.end()    ) ;
}

void 
EcalHitResponse::add( const PCaloHit& hit, CLHEP::HepRandomEngine* engine )
{
  if (!edm::isNotFinite( hit.time() ) && ( 0 == m_hitFilter || m_hitFilter->accepts( hit ) ) ) {
    putAnalogSignal( hit, engine ) ;
  }
}

void 
EcalHitResponse::add( const CaloSamples& hit ) 
{
  const DetId detId ( hit.id() ) ;

  EcalSamples& result ( *findSignal( detId ) ) ;

  const int rsize ( result.size() ) ;

  if(rsize != hit.size()) {
    throw cms::Exception("EcalDigitization")
      << "CaloSamples and EcalSamples have different sizes. Type Mismatach";
  }

  for( int bin ( 0 ) ; bin != rsize ; ++bin )
    {
      result[ bin ] += hit[ bin ] ;
    }

}


bool
EcalHitResponse::withinBunchRange(int bunchCrossing) const
{
   return(m_minBunch <= bunchCrossing && m_maxBunch >= bunchCrossing);
}

void
EcalHitResponse::initializeHits()
{
   blankOutUsedSamples() ;
}

void
EcalHitResponse::finalizeHits()
{
}

void 
EcalHitResponse::run( MixCollection<PCaloHit>& hits, CLHEP::HepRandomEngine* engine )
{
   blankOutUsedSamples() ;

   for( MixCollection<PCaloHit>::MixItr hitItr ( hits.begin() ) ;
    hitItr != hits.end() ; ++hitItr )
   {
      const PCaloHit& hit ( *hitItr ) ;
      const int bunch ( hitItr.bunch() ) ;
      if( withinBunchRange(bunch)  &&
      !edm::isNotFinite( hit.time() ) &&
      ( 0 == m_hitFilter ||
        m_hitFilter->accepts( hit ) ) ) putAnalogSignal( hit, engine ) ;
   }
   
}

void
EcalHitResponse::putAnalogSignal( const PCaloHit& hit, CLHEP::HepRandomEngine* engine )
{
   const DetId detId ( hit.id() ) ;

   const CaloSimParameters* parameters ( params( detId ) ) ;

   const double signal ( analogSignalAmplitude( detId, hit.energy(), engine ) ) ;

   double time = hit.time();

   if(m_hitCorrection) {
     time += m_hitCorrection->delay( hit, engine ) ;
   }

   const double jitter ( time - timeOfFlight( detId ) ) ;

   const double tzero = ( shape()->timeToRise()
              + parameters->timePhase() 
              - jitter 
              - BUNCHSPACE*( parameters->binOfMaximum()
                     - m_phaseShift             ) ) ;
   double binTime ( tzero ) ;

   EcalSamples& result ( *findSignal( detId ) ) ;

   const unsigned int rsize ( result.size() ) ;

   for( unsigned int bin ( 0 ) ; bin != rsize ; ++bin )
   {
      result[ bin ] += (*shape())( binTime )*signal ;
      binTime += BUNCHSPACE ;
   }
}

double
EcalHitResponse::findLaserConstant(const DetId& detId) const
{
  const edm::Timestamp& evtTimeStamp = edm::Timestamp(m_iTime);
  return (m_lasercals->getLaserCorrection(detId, evtTimeStamp));
}

EcalHitResponse::EcalSamples* 
EcalHitResponse::findSignal( const DetId& detId )
{
   const unsigned int di ( CaloGenericDetId( detId ).denseIndex() ) ;
   EcalSamples* result ( vSamAll( di ) ) ;
   if( result->zero() ) m_index.push_back( di ) ;
   return result ;
}

double 
EcalHitResponse::analogSignalAmplitude( const DetId& detId, double energy, CLHEP::HepRandomEngine* engine )
{
  const CaloSimParameters& parameters ( *params( detId ) ) ;

   // OK, the "energy" in the hit could be a real energy, deposited energy,
   // or pe count.  This factor converts to photoelectrons
  
   double lasercalib = 1.;
   if(m_useLCcorrection == true && detId.subdetId() != 3) {
     auto cache = m_laserCalibCache.find(detId);
     if( cache != m_laserCalibCache.end() ) {
       lasercalib = cache->second;
     } else {
       lasercalib = 1.0/findLaserConstant(detId);
       m_laserCalibCache.emplace(detId,lasercalib);
     }
   }

   double npe ( energy*lasercalib*parameters.simHitToPhotoelectrons( detId ) ) ;

   // do we need to doPoisson statistics for the photoelectrons?
   if( parameters.doPhotostatistics() ) {
     npe = CLHEP::RandPoissonQ::shoot(engine, npe);
   }
   if( 0 != m_PECorrection ) npe = m_PECorrection->correctPE( detId, npe, engine ) ;

   return npe ;
}

double 
EcalHitResponse::timeOfFlight( const DetId& detId ) const 
{
   const CaloCellGeometry* cellGeometry ( geometry()->getGeometry( detId ) ) ;
   assert( 0 != cellGeometry ) ;
   return cellGeometry->getPosition().mag()*cm/c_light ; // Units of c_light: mm/ns
}

void 
EcalHitResponse::add( const EcalSamples* pSam )
{
   EcalSamples& sam ( *findSignal( pSam->id() ) ) ;
   sam += (*pSam) ;
}

int 
EcalHitResponse::minBunch() const 
{
   return m_minBunch ; 
}

int 
EcalHitResponse::maxBunch() const 
{
   return m_maxBunch ; 
}

EcalHitResponse::VecInd& 
EcalHitResponse::index() 
{
   return m_index ; 
}

const EcalHitResponse::VecInd& 
EcalHitResponse::index() const
{
   return m_index ; 
}

const CaloVHitFilter* 
EcalHitResponse::hitFilter() const 
{ 
   return m_hitFilter ; 
}

const EcalHitResponse::EcalSamples* 
EcalHitResponse::findDetId( const DetId& detId ) const
{
   const unsigned int di ( CaloGenericDetId( detId ).denseIndex() ) ;
   return vSamAll( di ) ;
}