CastorAmplifier.cc

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#include "SimCalorimetry/CastorSim/src/CastorAmplifier.h"
#include "SimCalorimetry/CastorSim/src/CastorSimParameters.h"
#include "CalibFormats/CastorObjects/interface/CastorDbService.h"
#include "CondFormats/CastorObjects/interface/CastorPedestal.h"
#include "CondFormats/CastorObjects/interface/CastorGain.h"
#include "CondFormats/CastorObjects/interface/CastorPedestalWidth.h"
#include "CondFormats/CastorObjects/interface/CastorGainWidth.h"
#include "CalibFormats/CaloObjects/interface/CaloSamples.h"
#include "DataFormats/HcalDetId/interface/HcalDetId.h"
#include "FWCore/MessageLogger/interface/MessageLogger.h"

#include "CLHEP/Random/RandGaussQ.h"

#include<iostream>

CastorAmplifier::CastorAmplifier(const CastorSimParameterMap * parameters, bool addNoise) :
  theDbService(nullptr),
  theParameterMap(parameters),
  theStartingCapId(0),
  addNoise_(addNoise)
{
}

void CastorAmplifier::amplify(CaloSamples & frame, CLHEP::HepRandomEngine* engine) const {
  const CastorSimParameters & parameters = theParameterMap->castorParameters();
  assert(theDbService != nullptr);
  HcalGenericDetId hcalGenDetId(frame.id());
  const CastorPedestal* peds = theDbService->getPedestal(hcalGenDetId);
  const CastorPedestalWidth* pwidths = theDbService->getPedestalWidth(hcalGenDetId);
  if (!peds || !pwidths )
  {
    edm::LogError("CastorAmplifier") 
      << "Could not fetch HCAL/CASTOR conditions for channel " << hcalGenDetId;
  }
  else 
  {
    double gauss [32]; //big enough
    double noise [32]; //big enough
    double fCperPE = parameters.photoelectronsToAnalog(frame.id());
    double nominalfCperPE = parameters.getNominalfCperPE();

    for (int i = 0; i < frame.size(); i++) { gauss[i] = CLHEP::RandGaussQ::shoot(engine, 0., 1.); }
    if(addNoise_) {
      pwidths->makeNoise (frame.size(), gauss, noise);
    }
    for(int tbin = 0; tbin < frame.size(); ++tbin) {
      int capId = (theStartingCapId + tbin)%4;
      double pedestal = peds->getValue(capId);
      if(addNoise_) {
    pedestal += noise [tbin]*(fCperPE/nominalfCperPE);
      }
      frame[tbin] *= fCperPE;
      frame[tbin] += pedestal;
    }
  }
  LogDebug("CastorAmplifier") << frame;
}