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26 ////////////////////////////////////////////// <<
27 // 23 //
28 // Rough process describing a radiator of X-ra << 24 // $Id: G4GammaXTRadiator.hh,v 1.1 2002/01/22 15:22:53 grichine Exp $
29 // Thicknesses of plates and gas gaps are dist << 25 // GEANT4 tag $Name: geant4-05-00 $
>> 26 //
>> 27 //
>> 28 ///////////////////////////////////////////////////////////////////////////
>> 29 //
>> 30 // Rough process describing a radiator of X-ray transition radiation.
>> 31 // Thicknesses of plates and gas gaps are distributed according to gamma
30 // distribution. x are thicknesses of plates o 32 // distribution. x are thicknesses of plates or gas gaps:
31 // 33 //
32 // p(x) = (alpha/<x>)^alpha * x^(alpha-1) * st << 34 // p(x) = (alpha/<x>)^alpha * x^(alpha-1) * exp(-alpha*x/<x>) / G(alpha)
33 // 35 //
34 // G(alpha) is Euler's gamma function. 36 // G(alpha) is Euler's gamma function.
35 // Plates have mean <x> = fPlateThick > 0 and 37 // Plates have mean <x> = fPlateThick > 0 and power alpha = fAlphaPlate > 0 :
36 // Gas gaps have mean <x> = fGasThick > 0 and 38 // Gas gaps have mean <x> = fGasThick > 0 and power alpha = fAlphaGas > 0 :
37 // We suppose that: 39 // We suppose that:
38 // formation zone ~ mean thickness << absorpti 40 // formation zone ~ mean thickness << absorption length
39 // for each material and in the range 1-100 ke 41 // for each material and in the range 1-100 keV. This allows us to simplify
40 // interference effects in radiator stack (Get 42 // interference effects in radiator stack (GetStackFactor method).
41 // << 43 //
>> 44 //
42 // History: 45 // History:
43 // 21.01.02 V. Grichine, first version << 46 // 21.01.02 V. Grichine, first version
44 // 47 //
45 48
>> 49
46 #ifndef G4GammaXTRadiator_h 50 #ifndef G4GammaXTRadiator_h
47 #define G4GammaXTRadiator_h 1 51 #define G4GammaXTRadiator_h 1
48 52
49 #include "G4LogicalVolume.hh" <<
50 #include "G4Material.hh" <<
51 #include "G4VXTRenergyLoss.hh" 53 #include "G4VXTRenergyLoss.hh"
52 54
53 class G4GammaXTRadiator : public G4VXTRenergyL 55 class G4GammaXTRadiator : public G4VXTRenergyLoss
54 { 56 {
55 public: << 57 public:
56 explicit G4GammaXTRadiator(G4LogicalVolume* << 58
57 G4Material*, G4Ma << 59 G4GammaXTRadiator (G4LogicalVolume *anEnvelope,
58 G4int, << 60 G4double,G4double,
59 const G4String& p << 61 G4Material*,G4Material*,
60 ~G4GammaXTRadiator(); << 62 G4double,G4double,G4int,
>> 63 const G4String & processName = "XTRgammaRadiator");
>> 64 ~G4GammaXTRadiator ();
>> 65
>> 66 // Pure virtual function from base class
61 67
62 void ProcessDescription(std::ostream&) const << 68 G4double GetStackFactor( G4double energy, G4double gamma, G4double varAngle);
63 void DumpInfo() const override { ProcessDesc <<
64 69
65 G4double GetStackFactor(G4double energy, G4d << 70 private:
66 G4double varAngle) o << 71
>> 72 G4double fAlphaPlate, fAlphaGas ;
67 }; 73 };
68 74
69 #endif 75 #endif
>> 76
>> 77
>> 78
>> 79
>> 80
>> 81
70 82