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25 //
26 // ------------------------------------------------------------
27 // GEANT 4 class header file
28 //
29 // History:
30 // 21-5-98 1 version , V. Grichine
31 // 28-05-01, V.Ivanchenko minor changes to provide ANSI -wall compilation
32 // 23-05-06, H. Burkhardt: Energy spectrum from function rather than table
33 //
34 // ------------------------------------------------------------
35
36 #ifndef G4SynchrotronRadiation_h
37 #define G4SynchrotronRadiation_h 1
38
39 #include "globals.hh"
40 #include "G4Step.hh"
41 #include "G4ThreeVector.hh"
42 #include "G4Track.hh"
43 #include "G4VDiscreteProcess.hh"
44
45 class G4LossTableManager;
46 class G4ParticleDefinition;
47 class G4PropagatorInField;
48 class G4VEmAngularDistribution;
49
50 class G4SynchrotronRadiation : public G4VDiscreteProcess
51 {
52 public:
53 explicit G4SynchrotronRadiation(const G4String& pName = "SynRad",
54 G4ProcessType type = fElectromagnetic);
55
56 virtual ~G4SynchrotronRadiation();
57
58 G4SynchrotronRadiation& operator=(const G4SynchrotronRadiation& right) =
59 delete;
60 G4SynchrotronRadiation(const G4SynchrotronRadiation&) = delete;
61
62 virtual G4double GetMeanFreePath(const G4Track& track,
63 G4double previousStepSize,
64 G4ForceCondition* condition) override;
65
66 virtual G4VParticleChange* PostStepDoIt(const G4Track& track,
67 const G4Step& Step) override;
68
69 G4double GetPhotonEnergy(const G4Track& trackData, const G4Step& stepData);
70
71 G4double GetRandomEnergySR(G4double, G4double, G4double);
72
73 G4double InvSynFracInt(G4double x);
74 G4double Chebyshev(G4double a, G4double b, const G4double c[], G4int n,
75 G4double x);
76
77 virtual G4bool IsApplicable(const G4ParticleDefinition&) override;
78 virtual void BuildPhysicsTable(const G4ParticleDefinition&) override;
79
80 void ProcessDescription(std::ostream&) const override;
81 void DumpInfo() const override { ProcessDescription(G4cout); };
82
83 void SetAngularGenerator(G4VEmAngularDistribution* p);
84
85 private:
86 G4LossTableManager* theManager;
87 G4VEmAngularDistribution* genAngle;
88 G4ParticleDefinition* theGamma;
89 G4PropagatorInField* fFieldPropagator;
90
91 G4bool FirstTime;
92 G4bool FirstTime1;
93
94 G4int secID = -1; // creator modelID
95 };
96
97 ////////////////////////// INLINE METHODS /////////////////////////////
98
99 inline G4double G4SynchrotronRadiation::Chebyshev(G4double a, G4double b,
100 const G4double c[], G4int n,
101 G4double x)
102 {
103 G4double y;
104 G4double y2 = 2.0 * (y = (2.0 * x - a - b) / (b - a)); // Change of variable.
105 G4double d = 0., dd = 0.;
106 for(G4int j = n - 1; j >= 1; --j) // Clenshaw's recurrence.
107 {
108 G4double sv = d;
109 d = y2 * d - dd + c[j];
110 dd = sv;
111 }
112 return y * d - dd + 0.5 * c[0];
113 }
114
115 #endif // end of G4SynchrotronRadiation.hh
116