MinBiasScintillatorSD.h

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/*
  Copyright (C) 2002-2024 CERN for the benefit of the ATLAS collaboration
*/
 
//************************************************************
//
// Class MinBiasScintillatorSD
// Sensitive detector for the Minimum Bias Scintillator
//
// Author: A. Solodkov
// April 01, 2006.
//
//************************************************************
 
#ifndef MINBIASSCINTILLATOR_MINBIASSCINTILLATORSD_H
#define MINBIASSCINTILLATOR_MINBIASSCINTILLATORSD_H
 
// Base class
#include "G4VSensitiveDetector.hh"
 
#include "Identifier/Identifier.h"
#include "MinBiasScintSDOptions.h"
#include "TileSimEvent/TileHitVectorCellBuilder.h"
 
// STL headers
#include <string>
#include <vector>
 
// G4 needed classes
class G4Step;
class G4TouchableHistory;
 
class TileTBID;
 
class MinBiasScintillatorSD: public G4VSensitiveDetector {
  public:
    MinBiasScintillatorSD(const G4String& name, const std::string& hitCollectionName,
        const MinBiasScintSDOptions& opts);
    ~MinBiasScintillatorSD() = default;
 
    static constexpr int NCells = 32;
    using HitVectorBuilder = TileHitVectorCellBuilder<NCells>;
 
    virtual void Initialize(G4HCofThisEvent*) override final;
 
    virtual G4bool ProcessHits(G4Step*, G4TouchableHistory*) override final;
 
  private:
    // Options for the SD configuration
    const MinBiasScintSDOptions m_options;
 
    const TileTBID* m_tileTBID;
 
    static const int N_SIDE = 2;
    static const int N_PHI = 8;
    static const int N_ETA = 2;
    static const int N_DIST = N_SIDE * N_ETA;
 
    HitVectorBuilder* GetHitCollection();
 
    const std::string m_hitCollectionName;
    HitVectorBuilder* m_hitCollection{};
 
    inline int cell_index(int side, int phi, int eta) const {
      return (side * N_PHI + phi) * N_ETA + eta;
    }
    inline int dist_index(int side, int eta) const {
      return side * N_ETA + eta;
    }

    Identifier m_channelID[NCells];

    double m_deltaT;
    std::vector<double> m_deltaTvec;

    double m_timeCut;

    double m_lateHitTime;
 
    double m_deltaT_cell[N_DIST];
 
    G4double BirkLaw(const G4Step* aStep) const;

 
    inline double deltaT(double time) const {
      unsigned int i = 0;
      double delta = m_deltaTvec[i++];
      while (i < m_deltaTvec.size()) {
        if (time > m_deltaTvec[i++] && time < m_deltaTvec[i++]) break;
        delta = m_deltaTvec[i++];
      }
      return delta;
    }
};
 
#endif //MINBIASSCINTILLATOR_MINBIASSCINTILLATORSD_H