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27 //
28 // CaTS (Calorimetry and Tracking Simulation)
29 //
30 // Authors : Hans Wenzel
31 // Soon Yung Jun
32 // (Fermi National Accelerator Laboratory)
33 //
34 // History
35 // October 18th, 2021 : first implementation
36 //
37 // ********************************************************************
38 //
39 /// \file InteractionSD.cc
40 /// \brief Implementation of the CaTS::InteractionSD class
41
42 // Geant4 headers:
43 #include "G4HCofThisEvent.hh"
44 #include "G4Step.hh"
45 #include "G4ThreeVector.hh"
46 #include "G4SDManager.hh"
47 #include "G4ios.hh"
48 #include "G4SystemOfUnits.hh"
49 // project headers
50 #include "InteractionSD.hh"
51 #include "ParticleChange.hh"
52
53 InteractionSD::InteractionSD(G4String name)
54 : G4VSensitiveDetector(name)
55 {
56 G4String HCname = name + "_HC";
57 collectionName.insert(HCname);
58 G4cout << collectionName.size() << " InteractionSD name: " << name
59 << " collection Name: " << HCname << G4endl;
60 fHCID = -1;
61 }
62
63 InteractionSD::~InteractionSD()
64 {
65 delete fFirstInter;
66 delete fOtherInter;
67 }
68
69 void InteractionSD::Initialize(G4HCofThisEvent* HCE)
70 {
71 G4cout << "Hits Collection capacity: " << HCE->GetCapacity() << G4endl;
72 fInteractionHitsCollection =
73 new InteractionHitsCollection(SensitiveDetectorName, collectionName[0]);
74 if(fHCID < 0)
75 {
76 G4cout << "InteractionSD::Initialize: " << SensitiveDetectorName << " "
77 << collectionName[0] << G4endl;
78 fHCID = G4SDManager::GetSDMpointer()->GetCollectionID(collectionName[0]);
79 }
80 HCE->AddHitsCollection(fHCID, fInteractionHitsCollection);
81 fFirstInter = new ParticleChange(true);
82 fOtherInter = new ParticleChange();
83 }
84
85 G4bool InteractionSD::ProcessHits(G4Step* aStep, G4TouchableHistory*)
86 {
87 G4int nsc = fFirstInter->GetNumberOfSecondaries();
88 if(nsc > 0)
89 {
90 for(G4int i = 0; i < nsc; i++)
91 {
92 delete fFirstInter->GetSecondary(i);
93 }
94 fFirstInter->Clear();
95 }
96 nsc = fOtherInter->GetNumberOfSecondaries();
97 if(nsc > 0)
98 {
99 for(G4int i = 0; i < nsc; i++)
100 {
101 delete fOtherInter->GetSecondary(i);
102 }
103 fOtherInter->Clear();
104 }
105 const std::vector<const G4Track*>* secs = aStep->GetSecondaryInCurrentStep();
106 G4int nsec = secs->size();
107 for(G4int i = 0; i < nsec; i++)
108 {
109 G4Track* tr = new G4Track(*((*secs)[i]));
110 if(aStep->GetTrack()->GetTrackStatus() != fAlive) // track looses identity
111 {
112 if(aStep->GetTrack()->GetParentID() == 0) // primary track
113 {
114 fFirstInter->AddSecondary(tr);
115 }
116 else // secondary track, and it's also looses identity (re-interaction)
117 {
118 fOtherInter->AddSecondary(tr);
119 }
120 }
121 } // end loop over secondaries
122 G4int NSec = fFirstInter->GetNumberOfSecondaries();
123 if(NSec > 0)
124 {
125 const G4DynamicParticle* sec = 0;
126 for(G4int i = 0; i < NSec; i++)
127 {
128 sec = fFirstInter->GetSecondary(i)->GetDynamicParticle();
129 const G4String& pname = sec->GetDefinition()->GetParticleName();
130 G4double pmom = (sec->GetTotalMomentum()) / GeV;
131 G4double Ekin = (sec->GetKineticEnergy()) / GeV;
132 G4double theta = (sec->GetMomentum()).theta();
133 InteractionHit* newHit = new InteractionHit(pname, pmom, Ekin, theta);
134 fInteractionHitsCollection->insert(newHit);
135 }
136 }
137 return true;
138 }
139