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25 // 25 //
26 ////////////////////////////////////////////// <<
27 // 26 //
28 // Rough model describing a gamma function dis << 27 //
29 // transition radiation. XTR is considered to << 28 ///////////////////////////////////////////////////////////////////////////
30 // Thicknesses of plates and gas gaps are dist << 29 //
>> 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
31 // distribution. x are thicknesses of plates o 33 // distribution. x are thicknesses of plates or gas gaps:
32 // 34 //
33 // p(x) = (alpha/<x>)^alpha * x^(alpha-1) * st 35 // p(x) = (alpha/<x>)^alpha * x^(alpha-1) * std::exp(-alpha*x/<x>) / G(alpha)
34 // 36 //
35 // G(alpha) is Euler's gamma function. 37 // G(alpha) is Euler's gamma function.
36 // Plates have mean <x> = fPlateThick > 0 and 38 // Plates have mean <x> = fPlateThick > 0 and power alpha = fAlphaPlate > 0 :
37 // Gas gaps have mean <x> = fGasThick > 0 and 39 // Gas gaps have mean <x> = fGasThick > 0 and power alpha = fAlphaGas > 0 :
38 // We suppose that: 40 // We suppose that:
39 // formation zone ~ mean thickness << absorpti 41 // formation zone ~ mean thickness << absorption length
40 // for each material and in the range 1-100 ke 42 // for each material and in the range 1-100 keV. This allows us to simplify
41 // interference effects in radiator stack (Get 43 // interference effects in radiator stack (GetStackFactor method).
42 // << 44 //
>> 45 //
43 // History: 46 // History:
44 // 47 //
45 // 03.10.05 V. Grichine, first version << 48 // 03.10.05 V. Grichine, first version
46 // 49 //
47 50
>> 51
48 #ifndef G4XTRGammaRadModel_h 52 #ifndef G4XTRGammaRadModel_h
49 #define G4XTRGammaRadModel_h 1 53 #define G4XTRGammaRadModel_h 1
50 54
51 #include "G4LogicalVolume.hh" <<
52 #include "G4Material.hh" <<
53 #include "G4VXTRenergyLoss.hh" 55 #include "G4VXTRenergyLoss.hh"
54 56
55 class G4XTRGammaRadModel : public G4VXTRenergy << 57 class G4XTRGammaRadModel : public G4XTRenergyLoss
56 { 58 {
57 public: << 59 public:
58 explicit G4XTRGammaRadModel(G4LogicalVolume* << 60
59 G4Material*, G4M << 61 G4XTRGammaRadModel (G4LogicalVolume *anEnvelope,
60 G4int, << 62 G4double,G4double,
61 const G4String& << 63 G4Material*,G4Material*,
62 ~G4XTRGammaRadModel(); << 64 G4double,G4double,G4int,
>> 65 const G4String & processName = "XTRgammaRadiator" );
>> 66 ~G4XTRGammaRadModel ();
>> 67
>> 68 // Pure virtual function from base class
>> 69
>> 70 G4double GetStackFactor( G4double energy, G4double gamma, G4double varAngle);
63 71
64 void ProcessDescription(std::ostream&) const << 72 private:
65 void DumpInfo() const override { ProcessDesc <<
66 73
67 G4double GetStackFactor(G4double energy, G4d << 74 // G4double fAlphaPlate, fAlphaGas ;
68 G4double varAngle) o <<
69 }; 75 };
70 76
71 #endif 77 #endif
72 78