CaTS/include/PhotonSD.hh

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0029 //
0030 //  CaTS (Calorimetry and Tracking Simulation)
0031 //
0032 //  Authors : Hans Wenzel
0033 //            Soon Yung Jun
0034 //            (Fermi National Accelerator Laboratory)
0035 //
0036 // History
0037 //   October 18th, 2021 : first implementation
0038 //
0039 // ********************************************************************
0040 //
0041 /// \file PhotonSD.hh
0042 /// \brief Definition of the CaTS::PhotonSD class
0043
0044 #pragma once
0045
0046 #include "G4VSensitiveDetector.hh"
0047 #include "G4PhysicalConstants.hh"
0048 #include "PhotonHit.hh"
0049 #include <G4String.hh>
0050 #include <G4Types.hh>
0051 class G4Step;
0052 class G4HCofThisEvent;
0053 class G4TouchableHistory;
0054
0055 class PhotonSD : public G4VSensitiveDetector
0056 {
0057  public:
0058   PhotonSD(G4String);
0059   ~PhotonSD() = default;
0060   void Initialize(G4HCofThisEvent*) final;
0061   G4bool ProcessHits(G4Step*, G4TouchableHistory*) final;
0062 #ifdef WITH_G4OPTICKS
0063   void AddOpticksHits();
0064 #endif
0065   void EndOfEvent(G4HCofThisEvent* hitCollection) final;
0066
0067  private:
0068   PhotonHitsCollection* fPhotonHitsCollection{ 0 };
0069   G4int fHCID{ 0 };
0070   static constexpr G4double hc = (h_Planck * c_light) / (CLHEP::eV * CLHEP::nm);
0071   G4bool verbose{ false };
0072   inline G4double etolambda(G4double E)
0073   {
0074     // input photon energy in eV
0075     // return wavelength in nm:
0076     // lambda = h c/e
0077     //
0078     return hc / E;
0079   }
0080 };