Par02/src/Par02FastSimModelTracker.cc

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0026 //
0027 /// \file Par02FastSimModelTracker.cc
0028 /// \brief Implementation of the Par02FastSimModelTracker class
0029
0030 #include "Par02FastSimModelTracker.hh"
0031
0032 #include "Par02EventInformation.hh"
0033 #include "Par02Output.hh"
0034 #include "Par02PrimaryParticleInformation.hh"
0035 #include "Par02Smearer.hh"
0036
0037 #include "G4AnalysisManager.hh"
0038 #include "G4Electron.hh"
0039 #include "G4Event.hh"
0040 #include "G4FieldTrack.hh"
0041 #include "G4FieldTrackUpdator.hh"
0042 #include "G4Gamma.hh"
0043 #include "G4PathFinder.hh"
0044 #include "G4Positron.hh"
0045 #include "G4RunManager.hh"
0046 #include "G4SystemOfUnits.hh"
0047 #include "G4Track.hh"
0048 #include "Randomize.hh"
0049
0050 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0051
0052 Par02FastSimModelTracker::Par02FastSimModelTracker(
0053   G4String aModelName, G4Region* aEnvelope, Par02DetectorParametrisation::Parametrisation aType)
0054   : G4VFastSimulationModel(aModelName, aEnvelope),
0055     fCalculateParametrisation(),
0056     fParametrisation(aType)
0057 {}
0058
0059 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0060
0061 Par02FastSimModelTracker::Par02FastSimModelTracker(G4String aModelName, G4Region* aEnvelope)
0062   : G4VFastSimulationModel(aModelName, aEnvelope),
0063     fCalculateParametrisation(),
0064     fParametrisation(Par02DetectorParametrisation::eCMS)
0065 {}
0066
0067 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0068
0069 Par02FastSimModelTracker::Par02FastSimModelTracker(G4String aModelName)
0070   : G4VFastSimulationModel(aModelName),
0071     fCalculateParametrisation(),
0072     fParametrisation(Par02DetectorParametrisation::eCMS)
0073 {}
0074
0075 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0076
0077 Par02FastSimModelTracker::~Par02FastSimModelTracker() = default;
0078
0079 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0080
0081 G4bool Par02FastSimModelTracker::IsApplicable(const G4ParticleDefinition& aParticleType)
0082 {
0083   return aParticleType.GetPDGCharge() != 0;  // Applicable for all charged particles
0084 }
0085
0086 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0087
0088 G4bool Par02FastSimModelTracker::ModelTrigger(const G4FastTrack& /*aFastTrack*/)
0089 {
0090   return true;  // No kinematical restrictions to apply the parametrisation
0091 }
0092
0093 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0094
0095 void Par02FastSimModelTracker::DoIt(const G4FastTrack& aFastTrack, G4FastStep& aFastStep)
0096 {
0097   G4cout << " ________Tracker model triggered _________" << G4endl;
0098
0099   // Calculate the final position (at the outer boundary of the tracking detector)
0100   // of the particle with the momentum at the entrance of the tracking detector.
0101
0102   G4Track track = *aFastTrack.GetPrimaryTrack();
0103   G4FieldTrack aFieldTrack('0');
0104   G4FieldTrackUpdator::Update(&aFieldTrack, &track);
0105
0106   G4double retSafety = -1.0;
0107   ELimited retStepLimited;
0108   G4FieldTrack endTrack('a');
0109   G4double currentMinimumStep = 10.0 * m;  // Temporary: change that to sth connected
0110                                            // to particle momentum.
0111   G4PathFinder* fPathFinder = G4PathFinder::GetInstance();
0112   /*G4double lengthAlongCurve = */
0113   fPathFinder->ComputeStep(aFieldTrack, currentMinimumStep, 0,
0114                            aFastTrack.GetPrimaryTrack()->GetCurrentStepNumber(), retSafety,
0115                            retStepLimited, endTrack, aFastTrack.GetPrimaryTrack()->GetVolume());
0116
0117   // Place the particle at the tracking detector exit
0118   // (at the place it would reach without the change of its momentum).
0119   aFastStep.ProposePrimaryTrackFinalPosition(endTrack.GetPosition());
0120
0121   // Consider only primary tracks (do nothing else for secondary charged particles)
0122   G4ThreeVector Porg = aFastTrack.GetPrimaryTrack()->GetMomentum();
0123   if (!aFastTrack.GetPrimaryTrack()->GetParentID()) {
0124     auto info = (Par02EventInformation*)G4EventManager::GetEventManager()->GetUserInformation();
0125     if (info->GetDoSmearing()) {
0126       // Smearing according to the tracking detector resolution
0127       G4double res = fCalculateParametrisation->GetResolution(
0128         Par02DetectorParametrisation::eTRACKER, fParametrisation, Porg.mag());
0129       G4double eff = fCalculateParametrisation->GetEfficiency(
0130         Par02DetectorParametrisation::eTRACKER, fParametrisation, Porg.mag());
0131       G4ThreeVector Psm;
0132       Psm = Par02Smearer::Instance()->SmearMomentum(aFastTrack.GetPrimaryTrack(), res);
0133       Par02Output::Instance()->FillHistogram(0, ((Psm.mag() / MeV) / (Porg.mag() / MeV)));
0134       // Setting the values of Psm, res and eff
0135       ((Par02PrimaryParticleInformation*)(const_cast<G4PrimaryParticle*>(
0136                                             aFastTrack.GetPrimaryTrack()
0137                                               ->GetDynamicParticle()
0138                                               ->GetPrimaryParticle())
0139                                             ->GetUserInformation()))
0140         ->SetTrackerMomentum(Psm);
0141       ((Par02PrimaryParticleInformation*)(const_cast<G4PrimaryParticle*>(
0142                                             aFastTrack.GetPrimaryTrack()
0143                                               ->GetDynamicParticle()
0144                                               ->GetPrimaryParticle())
0145                                             ->GetUserInformation()))
0146         ->SetTrackerResolution(res);
0147       ((Par02PrimaryParticleInformation*)(const_cast<G4PrimaryParticle*>(
0148                                             aFastTrack.GetPrimaryTrack()
0149                                               ->GetDynamicParticle()
0150                                               ->GetPrimaryParticle())
0151                                             ->GetUserInformation()))
0152         ->SetTrackerEfficiency(eff);
0153     }
0154     else {
0155       // No smearing: simply setting the value of Porg
0156       ((Par02PrimaryParticleInformation*)(const_cast<G4PrimaryParticle*>(
0157                                             aFastTrack.GetPrimaryTrack()
0158                                               ->GetDynamicParticle()
0159                                               ->GetPrimaryParticle())
0160                                             ->GetUserInformation()))
0161         ->SetTrackerMomentum(Porg);
0162     }
0163   }
0164 }
0165
0166 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......