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Geant4/examples/advanced/CaTS/src/CalorimeterSD.cc

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  //
  //  CaTS (Calorimetry and Tracking Simulation)
  //
  //  Authors : Hans Wenzel
  //            Soon Yung Jun
  //            (Fermi National Accelerator Laboratory)
  //
  // History
  //   October 18th, 2021 : first implementation
  //
  // ********************************************************************
  //
  /// \file CalorimeterSD.cc
  /// \brief Implementation of the CaTS::CalorimeterSD class
  
  // Geant4 headers
  #include "G4HCofThisEvent.hh"
  #include "G4Step.hh"
  #include "G4SDManager.hh"
  #include "G4ios.hh"
  // project headers
  #include "CalorimeterSD.hh"
  #include "ConfigurationManager.hh"
  
  CalorimeterSD::CalorimeterSD(G4String name)
    : G4VSensitiveDetector(name)
  {
    G4String HCname = name + "_HC";
    collectionName.insert(HCname);
    G4cout << collectionName.size() << "   CalorimeterSD name:  " << name
           << " collection Name: " << HCname << G4endl;
    fHCID   = -1;
    verbose = ConfigurationManager::getInstance()->isEnable_verbose();
  }
  
  void CalorimeterSD::Initialize(G4HCofThisEvent* hce)
  {
    fCalorimeterHitsCollection =
      new CalorimeterHitsCollection(SensitiveDetectorName, collectionName[0]);
    if(fHCID < 0)
    {
      if(verbose)
        G4cout << "CalorimeterSD::Initialize:  " << SensitiveDetectorName << "   "
               << collectionName[0] << G4endl;
      fHCID = G4SDManager::GetSDMpointer()->GetCollectionID(collectionName[0]);
    }
    hce->AddHitsCollection(fHCID, fCalorimeterHitsCollection);
  }
  
  G4bool CalorimeterSD::ProcessHits(G4Step* aStep, G4TouchableHistory*)
  {
    // auto can be used for all results from retrieving functions
    auto edep = aStep->GetTotalEnergyDeposit() / CLHEP::MeV;
    if(edep == 0.)
      return false;
    auto time       = aStep->GetPreStepPoint()->GetGlobalTime() / CLHEP::ns;
    auto touch      = aStep->GetPreStepPoint()->GetTouchable();
    auto cellpos    = touch->GetTranslation();
    unsigned int ID = aStep->GetPreStepPoint()->GetPhysicalVolume()->GetCopyNo();
    auto theTrack   = aStep->GetTrack();
    auto particleType = theTrack->GetDefinition()->GetParticleName();
    //
    //  check if this cell has been hit before
    // fCalorimeterHitsCollection
    for(unsigned int j = 0; j < fCalorimeterHitsCollection->entries(); j++)
    {
      CalorimeterHit* aPreviousHit = (*fCalorimeterHitsCollection)[j];
      if(ID == aPreviousHit->GetId())
      {
        aPreviousHit->SetEdep(aStep->GetTotalEnergyDeposit() +
                              aPreviousHit->GetEdep());
        if((particleType == "e+") || (particleType == "gamma") ||
           (particleType == "e-"))
       {
         aPreviousHit->Setem_Edep(edep + aPreviousHit->Getem_Edep());
       }
       return true;
     }
   }
   //
   // otherwise create a new hit:
   //
   CalorimeterHit* newHit;
   if((particleType == "e+") || (particleType == "gamma") ||
      (particleType == "e-"))
   {
     newHit = new CalorimeterHit(ID, edep, edep, time, cellpos);
   }
   else
   {
     newHit = new CalorimeterHit(ID, edep, 0.0, time, cellpos);
   }
   fCalorimeterHitsCollection->insert(newHit);
   return true;
 }
 
 void CalorimeterSD::EndOfEvent(G4HCofThisEvent*)
 {
   G4int NbHits = fCalorimeterHitsCollection->entries();
   if(verbose)
     G4cout << " Number of CalorimeterHits:  " << NbHits << G4endl;
 }