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Geant4/examples/advanced/CaTS/include/PhotonSD.hh

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 25 //
 26 //
 27 
 28 // ********************************************************************
 29 //
 30 //  CaTS (Calorimetry and Tracking Simulation)
 31 //
 32 //  Authors : Hans Wenzel
 33 //            Soon Yung Jun
 34 //            (Fermi National Accelerator Laboratory)
 35 //
 36 // History
 37 //   October 18th, 2021 : first implementation
 38 //
 39 // ********************************************************************
 40 //
 41 /// \file PhotonSD.hh
 42 /// \brief Definition of the CaTS::PhotonSD class
 43 
 44 #pragma once
 45 
 46 #include "G4VSensitiveDetector.hh"
 47 #include "G4PhysicalConstants.hh"
 48 #include "PhotonHit.hh"
 49 #include <G4String.hh>
 50 #include <G4Types.hh>
 51 class G4Step;
 52 class G4HCofThisEvent;
 53 class G4TouchableHistory;
 54 
 55 class PhotonSD : public G4VSensitiveDetector
 56 {
 57  public:
 58   PhotonSD(G4String);
 59   ~PhotonSD() = default;
 60   void Initialize(G4HCofThisEvent*) final;
 61   G4bool ProcessHits(G4Step*, G4TouchableHistory*) final;
 62 #ifdef WITH_G4OPTICKS
 63   void AddOpticksHits();
 64 #endif
 65   void EndOfEvent(G4HCofThisEvent* hitCollection) final;
 66 
 67  private:
 68   PhotonHitsCollection* fPhotonHitsCollection{ 0 };
 69   G4int fHCID{ 0 };
 70   static constexpr G4double hc = (h_Planck * c_light) / (CLHEP::eV * CLHEP::nm);
 71   G4bool verbose{ false };
 72   inline G4double etolambda(G4double E)
 73   {
 74     // input photon energy in eV
 75     // return wavelength in nm:
 76     // lambda = h c/e
 77     //
 78     return hc / E;
 79   }
 80 };
 81