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G4XTRGammaRadModel.hh
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30 // Rough model describing a gamma function distributed radiator of X-ray
31 // transition radiation. XTR is considered to flux after radiator!
32 // Thicknesses of plates and gas gaps are distributed according to gamma
33 // distribution. x are thicknesses of plates or gas gaps:
34 //
35 // p(x) = (alpha/<x>)^alpha * x^(alpha-1) * std::exp(-alpha*x/<x>) / G(alpha)
36 //
37 // G(alpha) is Euler's gamma function.
38 // Plates have mean <x> = fPlateThick > 0 and power alpha = fAlphaPlate > 0 :
39 // Gas gaps have mean <x> = fGasThick > 0 and power alpha = fAlphaGas > 0 :
40 // We suppose that:
41 // formation zone ~ mean thickness << absorption length
42 // for each material and in the range 1-100 keV. This allows us to simplify
43 // interference effects in radiator stack (GetStackFactor method).
44 //
45 //
46 // History:
47 //
48 // 03.10.05 V. Grichine, first version
49 //
50 
51 #ifndef G4XTRGammaRadModel_h
52 #define G4XTRGammaRadModel_h 1
53 
54 #include "G4VXTRenergyLoss.hh"
55 
57 {
58 public:
59 
60  explicit G4XTRGammaRadModel (G4LogicalVolume *anEnvelope,
64  const G4String & processName = "XTRgammaRadiator" );
65  virtual ~G4XTRGammaRadModel ();
66 
67  // Pure virtual function from base class
68 
70  G4double varAngle) override;
71 
72 private:
73 
74  // G4double fAlphaPlate, fAlphaGas ;
75 };
76 
77 #endif
G4double GetStackFactor(G4double energy, G4double gamma, G4double varAngle) override
int G4int
Definition: G4Types.hh:78
G4XTRGammaRadModel(G4LogicalVolume *anEnvelope, G4double, G4double, G4Material *, G4Material *, G4double, G4double, G4int, const G4String &processName="XTRgammaRadiator")
G4double energy(const ThreeVector &p, const G4double m)
double G4double
Definition: G4Types.hh:76