BeamDigitizerModule.cc

/**************************************************************************
 * basf2 (Belle II Analysis Software Framework)                           *
 * Author: The Belle II Collaboration                                     *
 *                                                                        *
 * See git log for contributors and copyright holders.                    *
 * This file is licensed under LGPL-3.0, see LICENSE.md.                  *
 **************************************************************************/
 
#include <beast/beamabort/modules/BeamDigitizerModule.h>
#include <beast/beamabort/dataobjects/BeamabortSimHit.h>
 
#include <framework/logging/Logger.h>
#include <framework/core/RandomNumbers.h>
 
//c++
#include <cmath>
#include <string>
#include <fstream>
 
using namespace std;
using namespace Belle2;
using namespace beamabort;
 
 
//-----------------------------------------------------------------
//                 Register the Module
//-----------------------------------------------------------------
REG_MODULE(BeamDigitizer);
 
//-----------------------------------------------------------------
//                 Implementation
//-----------------------------------------------------------------
 
BeamDigitizerModule::BeamDigitizerModule() : Module()
{
  // Set module properties
  setDescription("Beamabort digitizer module");
 
  //Default values are set here. New values can be in BEAMABORT.xml.
  addParam("WorkFunction", m_WorkFunction, "Convert eV to e [e/eV] ", 1.12);
  addParam("FanoFactor", m_FanoFactor, "e resolution ", 0.1);
 
}
 
BeamDigitizerModule::~BeamDigitizerModule()
{
}
 
void BeamDigitizerModule::initialize()
{
  B2INFO("BeamDigitizer: Initializing");
  m_beamabortHit.registerInDataStore();
 
}
 
void BeamDigitizerModule::beginRun()
{
}
 
void BeamDigitizerModule::event()
{
 
  StoreArray<BeamabortSimHit> BeamSimHits;
  StoreArray<BeamabortHit> BeamHits;
  //Skip events with no BeamSimHits, but continue the event counter
  if (BeamSimHits.getEntries() == 0)
    return;
 
 
  int nentries = BeamSimHits.getEntries();
  for (int i = 0; i < nentries; i++) {
    BeamabortSimHit* aHit = BeamSimHits[i];
    int detNb = aHit->getCellId();
    double edep = aHit->getEnergyDep();
    double time = aHit->getFlightTime();
    int pdg = aHit->getPDGCode();
    double meanEl = edep / m_WorkFunction * 1e9; //GeV to eV
    double sigma = sqrt(m_FanoFactor * meanEl); //sigma in electron
    int NbEle = (int)gRandom->Gaus(meanEl, sigma); //electron number
    double fedep = ((double) NbEle) * m_WorkFunction * 1e-3; //eV to keV
    double Amp = NbEle / (6.25 * 1e18); // A x s
    //if ((fedep * 1e3) > m_WorkFunction)
    BeamHits.appendNew(BeamabortHit(fedep, Amp, time, detNb, pdg));
  }
 
}
 
void BeamDigitizerModule::endRun()
{
}
 
void BeamDigitizerModule::terminate()
{
}