Geant4 User's Guide for Application Developers - Geant4 - CERN

Detector Definition and ResponseExample 4.15. An example of defining primitive sensitivity classes taken fromExN07DetectorConstruction.void ExN07DetectorConstruction::SetupDetectors(){G4String filterName, particleName;G4SDParticleFilter* gammaFilter =new G4SDParticleFilter(filterName="gammaFilter",particleName="gamma");G4SDParticleFilter* electronFilter =new G4SDParticleFilter(filterName="electronFilter",particleName="e-");G4SDParticleFilter* positronFilter =new G4SDParticleFilter(filterName="positronFilter",particleName="e+");G4SDParticleFilter* epFilter = new G4SDParticleFilter(filterName="epFilter");epFilter->add(particleName="e-");epFilter->add(particleName="e+");for(G4int i=0;iSetFilter(gammaFilter);det->RegisterPrimitive(primitive);primitive = new G4PSNofSecondary("nElectron",j);primitive->SetFilter(electronFilter);det->RegisterPrimitive(primitive);primitive = new G4PSNofSecondary("nPositron",j);primitive->SetFilter(positronFilter);det->RegisterPrimitive(primitive);primitive = new G4PSMinKinEAtGeneration("minEkinGamma",j);primitive->SetFilter(gammaFilter);det->RegisterPrimitive(primitive);primitive = new G4PSMinKinEAtGeneration("minEkinElectron",j);primitive->SetFilter(electronFilter);det->RegisterPrimitive(primitive);primitive = new G4PSMinKinEAtGeneration("minEkinPositron",j);primitive->SetFilter(positronFilter);det->RegisterPrimitive(primitive);primitive = new G4PSTrackLength("trackLength",j);primitive->SetFilter(epFilter);det->RegisterPrimitive(primitive);primitive = new G4PSNofStep("nStep",j);primitive->SetFilter(epFilter);det->RegisterPrimitive(primitive);G4SDManager::GetSDMpointer()->AddNewDetector(det);if(j==0){ layerLogical[i]->SetSensitiveDetector(det); }else{ gapLogical[i]->SetSensitiveDetector(det); }}}}Each G4THitsMap object can be accessed from G4HCofThisEvent with a unique collection ID number. ThisID number can be obtained from G4SDManager::GetCollectionID() with a name of G4MultiFunctionalDetector131