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25 // 25 //
>> 26 //
>> 27 // $Id: G4GammaXTRadiator.cc,v 1.6 2010-06-16 15:34:15 gcosmo Exp $
>> 28 // GEANT4 tag $Name: geant4-09-04-patch-02 $
>> 29 //
>> 30
>> 31 #include <complex>
26 32
27 #include "G4GammaXTRadiator.hh" 33 #include "G4GammaXTRadiator.hh"
>> 34 #include "Randomize.hh"
28 35
29 #include "G4Gamma.hh" 36 #include "G4Gamma.hh"
30 37
31 ////////////////////////////////////////////// 38 ////////////////////////////////////////////////////////////////////////////
>> 39 //
32 // Constructor, destructor 40 // Constructor, destructor
33 G4GammaXTRadiator::G4GammaXTRadiator(G4Logical << 41
34 G4double << 42 G4GammaXTRadiator::G4GammaXTRadiator(G4LogicalVolume* anEnvelope,
35 G4Materia << 43 G4double alphaPlate,
>> 44 G4double alphaGas,
>> 45 G4Material* foilMat,G4Material* gasMat,
36 G4double 46 G4double a, G4double b, G4int n,
37 const G4S << 47 const G4String& processName) :
38 : G4VXTRenergyLoss(anEnvelope, foilMat, gasM << 48 G4VXTRenergyLoss(anEnvelope,foilMat,gasMat,a,b,n,processName)
39 { 49 {
40 G4cout << "Gamma distributed X-ray TR radiat << 50 G4cout<<"Gammma distributed X-ray TR radiator model is called"<<G4endl ;
41 51
42 // Build energy and angular integral spectra 52 // Build energy and angular integral spectra of X-ray TR photons from
43 // a radiator 53 // a radiator
44 54
45 fAlphaPlate = alphaPlate; << 55 fAlphaPlate = alphaPlate ;
46 fAlphaGas = alphaGas; << 56 fAlphaGas = alphaGas ;
47 G4cout << "fAlphaPlate = " << fAlphaPlate << << 57 G4cout<<"fAlphaPlate = "<<fAlphaPlate<<" ; fAlphaGas = "<<fAlphaGas<<G4endl ;
48 << G4endl; << 58
>> 59 // BuildTable() ;
49 } 60 }
50 61
51 ////////////////////////////////////////////// 62 ///////////////////////////////////////////////////////////////////////////
52 G4GammaXTRadiator::~G4GammaXTRadiator() = defa <<
53 63
54 void G4GammaXTRadiator::ProcessDescription(std << 64 G4GammaXTRadiator::~G4GammaXTRadiator()
55 { 65 {
56 out << 66 ;
57 << "Rough approximation describing a radia <<
58 "radiation.\n" <<
59 "Thicknesses of plates and gas gaps are <<
60 "description.\n"; <<
61 } 67 }
62 68
>> 69
>> 70
63 ////////////////////////////////////////////// 71 ///////////////////////////////////////////////////////////////////////////
>> 72 //
64 // Rough approximation for radiator interferen 73 // Rough approximation for radiator interference factor for the case of
65 // fully GamDistr radiator. The plate and gas << 74 // fully GamDistr radiator. The plate and gas gap thicknesses are distributed
66 // according to exponent. The mean values of t << 75 // according to exponent. The mean values of the plate and gas gap thicknesses
67 // are supposed to be about XTR formation zone << 76 // are supposed to be about XTR formation zones but much less than
68 // mean absorption length of XTR photons in co << 77 // mean absorption length of XTR photons in coresponding material.
69 G4double G4GammaXTRadiator::GetStackFactor(G4d << 78
70 G4d << 79 G4double
>> 80 G4GammaXTRadiator::GetStackFactor( G4double energy,
>> 81 G4double gamma, G4double varAngle )
71 { 82 {
72 G4double result, Za, Zb, Ma, Mb; << 83 G4double result, Za, Zb, Ma, Mb ;
>> 84
>> 85 Za = GetPlateFormationZone(energy,gamma,varAngle) ;
>> 86 Zb = GetGasFormationZone(energy,gamma,varAngle) ;
73 87
74 Za = GetPlateFormationZone(energy, gamma, va << 88 Ma = GetPlateLinearPhotoAbs(energy) ;
75 Zb = GetGasFormationZone(energy, gamma, varA << 89 Mb = GetGasLinearPhotoAbs(energy) ;
76 90
77 Ma = GetPlateLinearPhotoAbs(energy); <<
78 Mb = GetGasLinearPhotoAbs(energy); <<
79 91
80 G4complex Ca(1.0 + 0.5 * fPlateThick * Ma / << 92 G4complex Ca(1.0+0.5*fPlateThick*Ma/fAlphaPlate,fPlateThick/Za/fAlphaPlate) ;
81 fPlateThick / Za / fAlphaPlate) << 93 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 94
85 G4complex Ha = std::pow(Ca, -fAlphaPlate); << 95 G4complex Ha = std::pow(Ca,-fAlphaPlate) ;
86 G4complex Hb = std::pow(Cb, -fAlphaGas); << 96 G4complex Hb = std::pow(Cb,-fAlphaGas) ;
87 G4complex H = Ha * Hb; << 97 G4complex H = Ha*Hb ;
88 98
89 G4complex F1 = (1.0 - Ha) * (1.0 - Hb) / (1. << 99 G4complex F1 = (1.0 - Ha)*(1.0 - Hb )/(1.0 - H)
>> 100 * G4double(fPlateNumber) ;
90 101
91 G4complex F2 = (1.0 - Ha) * (1.0 - Ha) * Hb << 102 G4complex F2 = (1.0-Ha)*(1.0-Ha)*Hb/(1.0-H)/(1.0-H)
92 (1.0 - std::pow(H, fPlateNumb << 103 * (1.0 - std::pow(H,fPlateNumber)) ;
93 104
94 G4complex R = (F1 + F2) * OneInterfaceXTRdEd << 105 G4complex R = (F1 + F2)*OneInterfaceXTRdEdx(energy,gamma,varAngle) ;
95 106
96 result = 2.0 * std::real(R); << 107 result = 2.0*std::real(R) ;
97 << 108
98 return result; << 109 return result ;
99 } 110 }
>> 111
>> 112
>> 113 //
>> 114 //
>> 115 ////////////////////////////////////////////////////////////////////////////
>> 116
>> 117
>> 118
>> 119
>> 120
>> 121
>> 122
>> 123
100 124