TRT_PAI_Process.h

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/*
  Copyright (C) 2002-2019 CERN for the benefit of the ATLAS collaboration
*/
 
#ifndef TRT_PAI_Process_h
#define TRT_PAI_Process_h
 
#include "GaudiKernel/ServiceHandle.h"
#include "GaudiKernel/ToolHandle.h"
 
#include "TRT_PAI_Process/ITRT_PAITool.h"
#include "TRT_PAI_gasMixture.h"
 
#include "AthenaBaseComps/AthAlgTool.h"
 
#include <vector>
#include <string>
 
namespace CLHEP {
  class HepRandomEngine;
}
 
class TRT_PAI_Process final : public extends<AthAlgTool, ITRT_PAITool> {
 
 public:
 
  TRT_PAI_Process( const std::string& type,
                   const std::string& name,
                   const IInterface* parent );
  virtual StatusCode initialize() override final;
 
  virtual StatusCode finalize() override final;
 
  virtual double GetMeanFreePath(double scaledKineticEnergy,
                         double squaredCharge) const override final;
  virtual double GetEnergyTransfer(double scaledKineticEnergy, CLHEP::HepRandomEngine *rndmEngine) const override final;
 
 private:
  // Constants that define the span and granularity of the tables:
  const unsigned int m_nTabulatedGammaValues{56};
  const double m_gamExpMin{-2.};    // Min Lorentz gamma: 1+10^(m_gamExpMin)
  const double m_gamExpMax{5.};    // Max Lorentz gamma: 1+10^(m_gamExpMax)
  const double m_deltaGamExp{};
 
  // Arrays to hold tables:
  std::vector<float>                m_en_array;
  std::vector< std::vector<float> > m_fn_array;
  std::vector<float>                m_dndx;
  TRT_PAI_gasMixture *m_trtgas{};
 
 
  double ScaledEkin2GamVarTab(double scaledKineticEnergy) const;
 
  std::string m_gasType{"Auto"};
 
};
 
#endif