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25 //
26 // G4AdjointSteppingAction class implementation
27 //
28 // Author: L. Desorgher, SpaceIT GmbH
29 // Contract: ESA contract 21435/08/NL/AT
30 // Customer: ESA/ESTEC
31 // --------------------------------------------------------------------
32
33 #include "G4AdjointSteppingAction.hh"
34
35 #include "G4AdjointCrossSurfChecker.hh"
36 #include "G4AffineTransform.hh"
37 #include "G4PhysicalVolumeStore.hh"
38 #include "G4Track.hh"
39
40 //////////////////////////////////////////////////////////////////////////////
41 //
42 G4AdjointSteppingAction::G4AdjointSteppingAction()
43 {
44 theG4AdjointCrossSurfChecker = G4AdjointCrossSurfChecker::GetInstance();
45 }
46
47 //////////////////////////////////////////////////////////////////////////////
48 //
49 void G4AdjointSteppingAction::UserSteppingAction(const G4Step* aStep)
50 {
51 G4Track* aTrack = aStep->GetTrack();
52 if (! is_adjoint_tracking_mode) // forward tracking mode
53 {
54 if (! did_one_adj_part_reach_ext_source_during_event) {
55 aTrack->SetTrackStatus(fStopAndKill);
56 return;
57 }
58 if (theUserFwdSteppingAction != nullptr) {
59 theUserFwdSteppingAction->UserSteppingAction(aStep);
60 }
61 return;
62 }
63
64 // Apply first the user adjoint stepping action
65 // --------------------------------------------
66
67 did_adj_part_reach_ext_source = false;
68 if (theUserAdjointSteppingAction != nullptr) {
69 theUserAdjointSteppingAction->UserSteppingAction(aStep);
70 }
71
72 G4double nb_nuc = 1.;
73 G4ParticleDefinition* thePartDef = aTrack->GetDefinition();
74
75 if (thePartDef->GetParticleType() == "adjoint_nucleus") {
76 nb_nuc = G4double(thePartDef->GetBaryonNumber());
77 }
78
79 // Kill conditions for adjoint particles reaching the maximum energy
80 // -----------------------------------------------------------------
81
82 if (aTrack->GetKineticEnergy() >= ext_sourceEMax * nb_nuc) {
83 aTrack->SetTrackStatus(fStopAndKill);
84 did_adj_part_reach_ext_source = false;
85 return;
86 }
87
88 // Kill conditions for surface crossing
89 // --------------------------------------
90
91 G4String surface_name;
92 G4double cos_to_surface;
93 G4bool GoingIn;
94 G4ThreeVector crossing_pos;
95 if (theG4AdjointCrossSurfChecker->CrossingOneOfTheRegisteredSurface(
96 aStep, surface_name, crossing_pos, cos_to_surface, GoingIn))
97 {
98 if (surface_name == "ExternalSource") {
99 // Registering still needed
100 did_adj_part_reach_ext_source = true;
101 did_one_adj_part_reach_ext_source_during_event = true;
102 aTrack->SetTrackStatus(fStopAndKill);
103
104 // now register the adjoint particles reaching the external surface
105 last_momentum = aTrack->GetMomentum();
106 last_ekin = aTrack->GetKineticEnergy();
107 last_weight = aTrack->GetWeight();
108 last_part_def = aTrack->GetDefinition();
109 last_pos = crossing_pos;
110 return;
111 }
112 if (surface_name == "AdjointSource" && GoingIn) {
113 did_adj_part_reach_ext_source = false;
114 aTrack->SetTrackStatus(fStopAndKill);
115 return;
116 }
117 }
118
119 // Check for reaching out of world
120 //
121 if (aStep->GetPostStepPoint()->GetStepStatus() == fWorldBoundary) {
122 did_adj_part_reach_ext_source = true;
123 did_one_adj_part_reach_ext_source_during_event = true;
124 last_momentum = aTrack->GetMomentum();
125 last_ekin = aTrack->GetKineticEnergy();
126 last_weight = aTrack->GetWeight();
127 last_part_def = aTrack->GetDefinition();
128 last_pos = crossing_pos;
129 return;
130 }
131 }
132