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25 // 25 //
>> 26 //
>> 27 //
>> 28
>> 29 #include <complex>
26 30
27 #include "G4GammaXTRadiator.hh" 31 #include "G4GammaXTRadiator.hh"
>> 32 #include "Randomize.hh"
28 33
29 #include "G4Gamma.hh" 34 #include "G4Gamma.hh"
30 35
31 ////////////////////////////////////////////// 36 ////////////////////////////////////////////////////////////////////////////
>> 37 //
32 // Constructor, destructor 38 // Constructor, destructor
33 G4GammaXTRadiator::G4GammaXTRadiator(G4Logical << 39
34 G4double << 40 G4GammaXTRadiator::G4GammaXTRadiator(G4LogicalVolume* anEnvelope,
35 G4Materia << 41 G4double alphaPlate,
>> 42 G4double alphaGas,
>> 43 G4Material* foilMat,G4Material* gasMat,
36 G4double 44 G4double a, G4double b, G4int n,
37 const G4S << 45 const G4String& processName) :
38 : G4VXTRenergyLoss(anEnvelope, foilMat, gasM << 46 G4VXTRenergyLoss(anEnvelope,foilMat,gasMat,a,b,n,processName)
39 { 47 {
40 G4cout << "Gamma distributed X-ray TR radiat << 48 G4cout<<"Gamma distributed X-ray TR radiator model is called"<<G4endl ;
41 49
42 // Build energy and angular integral spectra 50 // Build energy and angular integral spectra of X-ray TR photons from
43 // a radiator 51 // a radiator
44 52
45 fAlphaPlate = alphaPlate; << 53 fAlphaPlate = alphaPlate ;
46 fAlphaGas = alphaGas; << 54 fAlphaGas = alphaGas ;
47 G4cout << "fAlphaPlate = " << fAlphaPlate << << 55 G4cout<<"fAlphaPlate = "<<fAlphaPlate<<" ; fAlphaGas = "<<fAlphaGas<<G4endl ;
48 << G4endl; << 56
>> 57 // BuildTable() ;
49 } 58 }
50 59
51 ////////////////////////////////////////////// 60 ///////////////////////////////////////////////////////////////////////////
52 G4GammaXTRadiator::~G4GammaXTRadiator() = defa <<
53 61
54 void G4GammaXTRadiator::ProcessDescription(std << 62 G4GammaXTRadiator::~G4GammaXTRadiator()
55 { 63 {
56 out << 64 ;
57 << "Rough approximation describing a radia <<
58 "radiation.\n" <<
59 "Thicknesses of plates and gas gaps are <<
60 "description.\n"; <<
61 } 65 }
62 66
>> 67
>> 68
63 ////////////////////////////////////////////// 69 ///////////////////////////////////////////////////////////////////////////
>> 70 //
64 // Rough approximation for radiator interferen 71 // Rough approximation for radiator interference factor for the case of
65 // fully GamDistr radiator. The plate and gas << 72 // fully GamDistr radiator. The plate and gas gap thicknesses are distributed
66 // according to exponent. The mean values of t << 73 // according to exponent. The mean values of the plate and gas gap thicknesses
67 // are supposed to be about XTR formation zone << 74 // are supposed to be about XTR formation zones but much less than
68 // mean absorption length of XTR photons in co << 75 // mean absorption length of XTR photons in coresponding material.
69 G4double G4GammaXTRadiator::GetStackFactor(G4d << 76
70 G4d << 77 G4double
>> 78 G4GammaXTRadiator::GetStackFactor( G4double energy,
>> 79 G4double gamma, G4double varAngle )
71 { 80 {
72 G4double result, Za, Zb, Ma, Mb; << 81 G4double result, Za, Zb, Ma, Mb ;
>> 82
>> 83 Za = GetPlateFormationZone(energy,gamma,varAngle) ;
>> 84 Zb = GetGasFormationZone(energy,gamma,varAngle) ;
73 85
74 Za = GetPlateFormationZone(energy, gamma, va << 86 Ma = GetPlateLinearPhotoAbs(energy) ;
75 Zb = GetGasFormationZone(energy, gamma, varA << 87 Mb = GetGasLinearPhotoAbs(energy) ;
76 88
77 Ma = GetPlateLinearPhotoAbs(energy); <<
78 Mb = GetGasLinearPhotoAbs(energy); <<
79 89
80 G4complex Ca(1.0 + 0.5 * fPlateThick * Ma / << 90 G4complex Ca(1.0+0.5*fPlateThick*Ma/fAlphaPlate,fPlateThick/Za/fAlphaPlate) ;
81 fPlateThick / Za / fAlphaPlate) << 91 G4complex Cb(1.0+0.5*fGasThick*Mb/fAlphaGas,fGasThick/Zb/fAlphaGas) ;
82 G4complex Cb(1.0 + 0.5 * fGasThick * Mb / fA <<
83 fGasThick / Zb / fAlphaGas); <<
84 92
85 G4complex Ha = std::pow(Ca, -fAlphaPlate); << 93 G4complex Ha = std::pow(Ca,-fAlphaPlate) ;
86 G4complex Hb = std::pow(Cb, -fAlphaGas); << 94 G4complex Hb = std::pow(Cb,-fAlphaGas) ;
87 G4complex H = Ha * Hb; << 95 G4complex H = Ha*Hb ;
88 96
89 G4complex F1 = (1.0 - Ha) * (1.0 - Hb) / (1. << 97 G4complex F1 = (1.0 - Ha)*(1.0 - Hb )/(1.0 - H)
>> 98 * G4double(fPlateNumber) ;
90 99
91 G4complex F2 = (1.0 - Ha) * (1.0 - Ha) * Hb << 100 G4complex F2 = (1.0-Ha)*(1.0-Ha)*Hb/(1.0-H)/(1.0-H)
92 (1.0 - std::pow(H, fPlateNumb << 101 * (1.0 - std::pow(H,fPlateNumber)) ;
93 102
94 G4complex R = (F1 + F2) * OneInterfaceXTRdEd << 103 G4complex R = (F1 + F2)*OneInterfaceXTRdEdx(energy,gamma,varAngle) ;
95 104
96 result = 2.0 * std::real(R); << 105 result = 2.0*std::real(R) ;
97 << 106
98 return result; << 107 return result ;
99 } 108 }
>> 109
>> 110
>> 111 //
>> 112 //
>> 113 ////////////////////////////////////////////////////////////////////////////
>> 114
>> 115
>> 116
>> 117
>> 118
>> 119
>> 120
>> 121
100 122