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25 // 22 //
26 ////////////////////////////////////////////// <<
27 // 23 //
28 // Rough model describing a gamma function dis << 24 //
29 // transition radiation. XTR is considered to << 25 ///////////////////////////////////////////////////////////////////////////
30 // Thicknesses of plates and gas gaps are dist << 26 //
>> 27 // Rough model describing a gamma function distributed radiator of X-ray
>> 28 // transition radiation. XTR is considered to flux after radiator!
>> 29 // Thicknesses of plates and gas gaps are distributed according to gamma
31 // distribution. x are thicknesses of plates o 30 // distribution. x are thicknesses of plates or gas gaps:
32 // 31 //
33 // p(x) = (alpha/<x>)^alpha * x^(alpha-1) * st 32 // p(x) = (alpha/<x>)^alpha * x^(alpha-1) * std::exp(-alpha*x/<x>) / G(alpha)
34 // 33 //
35 // G(alpha) is Euler's gamma function. 34 // G(alpha) is Euler's gamma function.
36 // Plates have mean <x> = fPlateThick > 0 and 35 // Plates have mean <x> = fPlateThick > 0 and power alpha = fAlphaPlate > 0 :
37 // Gas gaps have mean <x> = fGasThick > 0 and 36 // Gas gaps have mean <x> = fGasThick > 0 and power alpha = fAlphaGas > 0 :
38 // We suppose that: 37 // We suppose that:
39 // formation zone ~ mean thickness << absorpti 38 // formation zone ~ mean thickness << absorption length
40 // for each material and in the range 1-100 ke 39 // for each material and in the range 1-100 keV. This allows us to simplify
41 // interference effects in radiator stack (Get 40 // interference effects in radiator stack (GetStackFactor method).
42 // << 41 //
>> 42 //
43 // History: 43 // History:
44 // 44 //
45 // 03.10.05 V. Grichine, first version << 45 // 03.10.05 V. Grichine, first version
46 // 46 //
47 47
>> 48
48 #ifndef G4XTRGammaRadModel_h 49 #ifndef G4XTRGammaRadModel_h
49 #define G4XTRGammaRadModel_h 1 50 #define G4XTRGammaRadModel_h 1
50 51
51 #include "G4LogicalVolume.hh" <<
52 #include "G4Material.hh" <<
53 #include "G4VXTRenergyLoss.hh" 52 #include "G4VXTRenergyLoss.hh"
54 53
55 class G4XTRGammaRadModel : public G4VXTRenergy << 54 class G4XTRGammaRadModel : public G4XTRenergyLoss
56 { 55 {
57 public: << 56 public:
58 explicit G4XTRGammaRadModel(G4LogicalVolume* << 57
59 G4Material*, G4M << 58 G4XTRGammaRadModel (G4LogicalVolume *anEnvelope,
60 G4int, << 59 G4double,G4double,
61 const G4String& << 60 G4Material*,G4Material*,
62 ~G4XTRGammaRadModel(); << 61 G4double,G4double,G4int,
>> 62 const G4String & processName = "XTRgammaRadiator" );
>> 63 ~G4XTRGammaRadModel ();
>> 64
>> 65 // Pure virtual function from base class
>> 66
>> 67 G4double GetStackFactor( G4double energy, G4double gamma, G4double varAngle);
63 68
64 void ProcessDescription(std::ostream&) const << 69 private:
65 void DumpInfo() const override { ProcessDesc <<
66 70
67 G4double GetStackFactor(G4double energy, G4d << 71 // G4double fAlphaPlate, fAlphaGas ;
68 G4double varAngle) o <<
69 }; 72 };
70 73
71 #endif 74 #endif
72 75