PixelDigitizerAlgorithm.cc

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#include <iostream>
#include <cmath>

#include "SimTracker/SiPhase2Digitizer/plugins/PixelDigitizerAlgorithm.h"
#include "SimTracker/Common/interface/SiG4UniversalFluctuation.h"
#include "SimGeneral/NoiseGenerators/interface/GaussianTailNoiseGenerator.h"

#include "DataFormats/TrackerCommon/interface/TrackerTopology.h"
#include "SimDataFormats/TrackingHit/interface/PSimHitContainer.h"

#include "FWCore/Utilities/interface/RandomNumberGenerator.h"
#include "CLHEP/Random/RandGaussQ.h"
#include "CLHEP/Random/RandFlat.h"

#include "FWCore/MessageLogger/interface/MessageLogger.h"
#include "FWCore/ParameterSet/interface/ParameterSet.h"
#include "FWCore/ServiceRegistry/interface/Service.h"
#include "FWCore/Utilities/interface/Exception.h"
#include "CalibTracker/SiPixelESProducers/interface/SiPixelGainCalibrationOfflineSimService.h"

#include "CondFormats/SiPixelObjects/interface/GlobalPixel.h"
#include "CondFormats/DataRecord/interface/SiPixelQualityRcd.h"
#include "CondFormats/DataRecord/interface/SiPixelFedCablingMapRcd.h"
#include "CondFormats/DataRecord/interface/SiPixelLorentzAngleSimRcd.h"
#include "CondFormats/SiPixelObjects/interface/SiPixelFedCablingMap.h"
#include "CondFormats/SiPixelObjects/interface/SiPixelFedCablingTree.h"
#include "CondFormats/SiPixelObjects/interface/SiPixelFedCabling.h"
#include "CondFormats/SiPixelObjects/interface/PixelIndices.h"
#include "CondFormats/SiPixelObjects/interface/SiPixelLorentzAngle.h"
#include "CondFormats/SiPixelObjects/interface/SiPixelQuality.h"
#include "CondFormats/SiPixelObjects/interface/PixelROC.h"
#include "CondFormats/SiPixelObjects/interface/LocalPixel.h"
#include "CondFormats/SiPixelObjects/interface/CablingPathToDetUnit.h"
#include "CondFormats/SiPixelObjects/interface/SiPixelFrameReverter.h"
#include "CondFormats/SiPixelObjects/interface/PixelFEDCabling.h"
#include "CondFormats/SiPixelObjects/interface/PixelFEDLink.h"
#include "CondFormats/SiPixelObjects/interface/PixelROC.h"

// Geometry
#include "Geometry/TrackerGeometryBuilder/interface/TrackerGeometry.h"
#include "Geometry/Records/interface/TrackerDigiGeometryRecord.h"
#include "Geometry/TrackerGeometryBuilder/interface/PixelGeomDetUnit.h"
#include "Geometry/CommonTopologies/interface/PixelTopology.h"
#include "Geometry/Records/interface/IdealGeometryRecord.h"

using namespace edm;
using namespace sipixelobjects;

void PixelDigitizerAlgorithm::init(const edm::EventSetup& es) {
  if (use_ineff_from_db_)  // load gain calibration service fromdb...
    theSiPixelGainCalibrationService_->setESObjects(es);

  if (use_deadmodule_DB_)
    es.get<SiPixelQualityRcd>().get(SiPixelBadModule_);

  if (use_LorentzAngle_DB_)  // Get Lorentz angle from DB record
    es.get<SiPixelLorentzAngleSimRcd>().get(SiPixelLorentzAngle_);

  // gets the map and geometry from the DB (to kill ROCs)
  es.get<SiPixelFedCablingMapRcd>().get(map_);
  es.get<TrackerDigiGeometryRecord>().get(geom_);
}

PixelDigitizerAlgorithm::PixelDigitizerAlgorithm(const edm::ParameterSet& conf, CLHEP::HepRandomEngine& eng) :
  Phase2TrackerDigitizerAlgorithm(conf.getParameter<ParameterSet>("AlgorithmCommon"),
                  conf.getParameter<ParameterSet>("PixelDigitizerAlgorithm"),
                  eng)
{
  pixelFlag = true;
  LogInfo("PixelDigitizerAlgorithm") << "Algorithm constructed "
                     << "Configuration parameters:"
                     << "Threshold/Gain = "
                     << "threshold in electron Endcap = "
                     << theThresholdInE_Endcap
                     << "threshold in electron Barrel = "
                     << theThresholdInE_Barrel
                     << " " << theElectronPerADC << " " << theAdcFullScale
                     << " The delta cut-off is set to " << tMax
                     << " pix-inefficiency " << AddPixelInefficiency;
}
PixelDigitizerAlgorithm::~PixelDigitizerAlgorithm() {
  LogDebug("PixelDigitizerAlgorithm") << "Algorithm deleted";
}
void PixelDigitizerAlgorithm::accumulateSimHits(std::vector<PSimHit>::const_iterator inputBegin,
                        std::vector<PSimHit>::const_iterator inputEnd,
                        const size_t inputBeginGlobalIndex,
                        const unsigned int tofBin,
                        const Phase2TrackerGeomDetUnit* pixdet,
                        const GlobalVector& bfield) {
  // produce SignalPoint's for all SimHit's in detector
  // Loop over hits
  uint32_t detId = pixdet->geographicalId().rawId();
  size_t simHitGlobalIndex = inputBeginGlobalIndex; // This needs to be stored to create the digi-sim link later
  for (auto it = inputBegin; it != inputEnd; ++it, ++simHitGlobalIndex) {
    // skip hits not in this detector.
    if ((*it).detUnitId() != detId)
      continue;
    
    LogDebug ("PixelDigitizerAlgorithm")
      << (*it).particleType() << " " << (*it).pabs() << " "
      << (*it).energyLoss() << " " << (*it).tof() << " "
      << (*it).trackId() << " " << (*it).processType() << " "
      << (*it).detUnitId()
      << (*it).entryPoint() << " " << (*it).exitPoint();
      
    std::vector<DigitizerUtility::EnergyDepositUnit> ionization_points;
    std::vector<DigitizerUtility::SignalPoint> collection_points;
    
    // fill collection_points for this SimHit, indpendent of topology
    // Check the TOF cut
    if (((*it).tof() - pixdet->surface().toGlobal((*it).localPosition()).mag()/30.) >= theTofLowerCut &&
    ((*it).tof() - pixdet->surface().toGlobal((*it).localPosition()).mag()/30.) <= theTofUpperCut) {
      primary_ionization(*it, ionization_points); // fills _ionization_points
      drift (*it, pixdet, bfield, ionization_points, collection_points);  // transforms _ionization_points to collection_points
      
      // compute induced signal on readout elements and add to _signal
      induce_signal(*it, simHitGlobalIndex, tofBin, pixdet, collection_points); // *ihit needed only for SimHit<-->Digi link
    }
  }
}