PXDGainCalibrator.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 <pxd/reconstruction/PXDGainCalibrator.h>
#include <vxd/geometry/GeoCache.h>
#include <framework/gearbox/Const.h>
 
using namespace std;
 
 
void Belle2::PXD::PXDGainCalibrator::initialize()
{
  m_gainsFromDB = unique_ptr<Belle2::DBObjPtr<Belle2::PXDGainMapPar>>(new Belle2::DBObjPtr<Belle2::PXDGainMapPar>());
 
  if ((*m_gainsFromDB).isValid()) {
    setGains();
    (*m_gainsFromDB).addCallback(this, &Belle2::PXD::PXDGainCalibrator::setGains);
  }
}
 
 
Belle2::PXD::PXDGainCalibrator& Belle2::PXD::PXDGainCalibrator::getInstance()
{
  static std::unique_ptr<Belle2::PXD::PXDGainCalibrator> instance(new Belle2::PXD::PXDGainCalibrator());
  return *instance;
}
 
 
float Belle2::PXD::PXDGainCalibrator::getGainCorrection(Belle2::VxdID id, unsigned int uid, unsigned int vid) const
{
  unsigned int rowsPerBin = Belle2::VXD::GeoCache::getInstance().get(id).getVCells() / m_gains.getBinsV();
  unsigned int drainsPerBin = 4 * Belle2::VXD::GeoCache::getInstance().get(id).getUCells() / m_gains.getBinsU();
  unsigned int uBin = (uid * 4 + vid % 4) / drainsPerBin;
  unsigned int vBin = vid / rowsPerBin;
  return m_gains.getContent(id.getID(), uBin, vBin);
}
 
float Belle2::PXD::PXDGainCalibrator::getADUToEnergy(Belle2::VxdID id, unsigned int uid, unsigned int vid) const
{
  // FIXME: These constants are hardcoded as intermediate solution.
  // They should be obtained from GeoCache and ultimately from the condDB.
  float ADCUnit = 130.0;
  float Gq = 0.6;
  return Const::ehEnergy * ADCUnit / Gq / getGainCorrection(id, uid, vid);
}
 
 
 
unsigned short Belle2::PXD::PXDGainCalibrator::getBinU(VxdID id, unsigned int uid, unsigned int vid, unsigned short nBinsU) const
{
  unsigned int drainsPerBin = 4 * Belle2::VXD::GeoCache::getInstance().get(id).getUCells() / nBinsU;
  return (uid * 4 + vid % 4) / drainsPerBin;
}
 
unsigned short Belle2::PXD::PXDGainCalibrator::getBinU(VxdID id, unsigned int uid, unsigned int vid) const
{
  return getBinU(id, uid, vid, m_gains.getBinsU());
}
 
unsigned short Belle2::PXD::PXDGainCalibrator::getBinV(VxdID id, unsigned int vid, unsigned short nBinsV) const
{
  unsigned int rowsPerBin = Belle2::VXD::GeoCache::getInstance().get(id).getVCells() / nBinsV;
  return vid / rowsPerBin;
}
 
unsigned short Belle2::PXD::PXDGainCalibrator::getBinV(VxdID id, unsigned int vid) const
{
  return getBinV(id, vid, m_gains.getBinsV());
}
 
unsigned short Belle2::PXD::PXDGainCalibrator::getGlobalID(VxdID id, unsigned int uid, unsigned int vid) const
{
  auto uBin = getBinU(id, uid, vid);
  auto vBin = getBinV(id, vid);
  return m_gains.getGlobalID(uBin, vBin);
}
 
 
void Belle2::PXD::PXDGainCalibrator::setGains()
{
  m_gains = **m_gainsFromDB;
}