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25 //
26 //
27 // G4MicroElecSurface.hh,
28 // 2020/05/20 P. Caron, C. Inguimbert are with ONERA [b]
29 // Q. Gibaru is with CEA [a], ONERA [b] and CNES [c]
30 // D. Lambert is with CEA [a]
31 //
32 // A part of this work has been funded by the French space agency(CNES[c])
33 // [a] CEA, DAM, DIF - 91297 ARPAJON, France
34 // [b] ONERA - DPHY, 2 avenue E.Belin, 31055 Toulouse, France
35 // [c] CNES, 18 av.E.Belin, 31401 Toulouse CEDEX, France
36 //
37 // Based on the following publications
38 //
39 // - Q.Gibaru, C.Inguimbert, P.Caron, M.Raine, D.Lambert, J.Puech,
40 // Geant4 physics processes for microdosimetry and secondary electron emission simulation :
41 // Extension of MicroElec to very low energies and new materials
42 // NIM B, 2020, in review.
43 //
44 // Based on:
45 // -the class G4OpBoundaryProcess.cc for the surface crossing of
46 // optical photons.
47 //
48 //
49 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
50
51 #ifndef G4MicroElecSurface_h
52 #define G4MicroElecSurface_h 1
53
54 /////////////
55 // Includes
56 /////////////
57
58 #include "globals.hh"
59 #include "templates.hh"
60 #include "geomdefs.hh"
61 #include "Randomize.hh"
62 #include "G4ProductionCutsTable.hh"
63 #include "G4RandomTools.hh"
64 #include "G4RandomDirection.hh"
65 #include "G4MicroElecMaterialStructure.hh"
66 #include "G4Step.hh"
67 #include "G4VDiscreteProcess.hh"
68 #include "G4DynamicParticle.hh"
69 #include "G4Material.hh"
70 #include "G4LogicalBorderSurface.hh"
71 #include "G4LogicalSkinSurface.hh"
72 #include "G4OpticalPhoton.hh"
73 #include "G4Electron.hh"
74 #include "G4TransportationManager.hh"
75
76 // Class Description:
77 // Discrete Process -- reflection/refraction at interfaces for electrons.
78 // Class inherits publicly from G4VDiscreteProcess.
79 // Class Description - End:
80
81 /////////////////////
82 // Class Definition
83 /////////////////////
84
85 enum G4MicroElecSurfaceStatus { UndefinedSurf,
86 NotAtBoundarySurf,
87 SameMaterialSurf,
88 StepTooSmallSurf };
89
90 class G4MicroElecSurface : public G4VDiscreteProcess
91 {
92 public:
93 explicit G4MicroElecSurface(const G4String& processName = "MicroElecSurface",
94 G4ProcessType type = fElectromagnetic);
95
96 ~G4MicroElecSurface() override;
97
98 G4bool IsApplicable(const G4ParticleDefinition& aParticleType) override;
99 // Returns true -> 'is applicable' only for an electron.
100
101 void SetFlagFranchissement();
102
103 G4double GetMeanFreePath(const G4Track& ,
104 G4double ,
105 G4ForceCondition* condition) override;
106 // Returns infinity; i. e. the process does not limit the step,
107 // but sets the 'Forced' condition for the DoIt to be invoked at
108 // every step. However, only at a boundary will any action be
109 // taken.
110
111 G4VParticleChange* PostStepDoIt(const G4Track& aTrack,
112 const G4Step& aStep) override;
113 // This is the method implementing boundary processes.
114
115 void BuildPhysicsTable(const G4ParticleDefinition&) override;
116 // Initialisation
117
118 G4MicroElecSurfaceStatus GetStatus() const;
119 // Returns the current status.
120
121 G4MicroElecSurface(const G4MicroElecSurface &right) = delete;
122 G4MicroElecSurface& operator=(const G4MicroElecSurface &right) = delete;
123
124 void Initialise();
125
126 private:
127 // Returns the incident angle of electron
128 G4double GetIncidentAngle();
129 G4ThreeVector Reflexion(const G4StepPoint* PostStepPoint);
130
131 // private elements
132 typedef std::map<G4String, G4double, std::less<G4String> > WorkFunctionTable;
133 WorkFunctionTable tableWF; //Table of all materials simulated
134
135 G4double theParticleMomentum;
136 G4ThreeVector oldMomentum, previousMomentum;
137 G4ThreeVector theGlobalNormal;
138 G4ThreeVector theFacetNormal;
139 const G4Material* material1;
140 const G4Material* material2;
141 G4MicroElecSurfaceStatus theStatus;
142
143 G4double kCarTolerance;
144 G4double ekint, thetat, thetaft, energyThreshold, crossingProbability;
145 G4bool flag_franchissement_surface, flag_reflexion,flag_normal, teleportToDo, teleportDone, isInitialised;
146
147 };
148
149 #endif
150