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25 // 25 //
>> 26 // $Id: G4UniversalFluctuation.hh,v 1.3 2006/06/29 19:51:44 gunter Exp $
>> 27 // GEANT4 tag $Name: geant4-08-01 $
>> 28 //
26 // ------------------------------------------- 29 // -------------------------------------------------------------------
27 // 30 //
28 // GEANT4 Class header file 31 // GEANT4 Class header file
29 // 32 //
30 // 33 //
31 // File name: G4UniversalFluctuation 34 // File name: G4UniversalFluctuation
32 // 35 //
33 // Author: V.Ivanchenko make a class wi << 36 // Author: Vladimir Ivanchenko
34 // 37 //
35 // Creation date: 03.01.2002 38 // Creation date: 03.01.2002
36 // 39 //
37 // Modifications: 40 // Modifications:
38 // 41 //
>> 42 // 09-12-02 remove warnings (V.Ivanchenko)
>> 43 // 28-12-02 add method Dispersion (V.Ivanchenko)
>> 44 // 07-02-03 change signature (V.Ivanchenko)
>> 45 // 13-02-03 Add name (V.Ivanchenko)
>> 46 // 16-10-03 Changed interface to Initialisation (V.Ivanchenko)
>> 47 // 07-02-05 define problim = 5.e-3 (mma)
39 // 48 //
40 // Class Description: 49 // Class Description:
41 // 50 //
42 // Implementation of energy loss fluctuations << 51 // Implementation of energy loss fluctuations
43 52
44 // ------------------------------------------- 53 // -------------------------------------------------------------------
45 // 54 //
46 55
47 #ifndef G4UniversalFluctuation_h 56 #ifndef G4UniversalFluctuation_h
48 #define G4UniversalFluctuation_h 1 57 #define G4UniversalFluctuation_h 1
49 58
>> 59
50 #include "G4VEmFluctuationModel.hh" 60 #include "G4VEmFluctuationModel.hh"
51 #include "G4ParticleDefinition.hh" <<
52 #include "G4Poisson.hh" <<
53 #include <CLHEP/Random/RandomEngine.h> <<
54 61
55 class G4UniversalFluctuation : public G4VEmFlu 62 class G4UniversalFluctuation : public G4VEmFluctuationModel
56 { 63 {
57 64
58 public: 65 public:
59 66
60 explicit G4UniversalFluctuation(const G4Stri << 67 G4UniversalFluctuation(const G4String& nam = "UniFluc");
61 68
62 ~G4UniversalFluctuation() override; << 69 virtual ~G4UniversalFluctuation();
63 70
64 G4double SampleFluctuations(const G4Material << 71 G4double SampleFluctuations(const G4Material*,
65 const G4DynamicParticle*, << 72 const G4DynamicParticle*,
66 const G4double, << 73 G4double&,
67 const G4double, const G4double) ov << 74 G4double&,
68 << 75 G4double&);
69 G4double Dispersion(const G4Material*, << 76
70 const G4DynamicParticle*, << 77 G4double Dispersion( const G4Material*,
71 const G4double, const G4 << 78 const G4DynamicParticle*,
72 const G4double) override << 79 G4double&,
73 << 80 G4double&);
74 // Initialisation for a new particle type <<
75 void InitialiseMe(const G4ParticleDefinition <<
76 <<
77 // Initialisation prestep <<
78 void SetParticleAndCharge(const G4ParticleDe <<
79 G4double q2) override; <<
80 81
81 // hide assignment operator << 82 void InitialiseMe(const G4ParticleDefinition*);
82 G4UniversalFluctuation & operator= <<
83 (const G4UniversalFluctuation &right) = dele <<
84 G4UniversalFluctuation(const G4UniversalFluc <<
85 83
86 protected: 84 protected:
87 85
88 virtual G4double SampleGlandz(CLHEP::HepRand << 86 private:
89 const G4Materi <<
90 87
91 inline void AddExcitation(CLHEP::HepRandomEn << 88 // hide assignment operator
92 const G4double ax, << 89 G4UniversalFluctuation & operator=(const G4UniversalFluctuation &right);
93 G4double& eav, << 90 G4UniversalFluctuation(const G4UniversalFluctuation&);
94 G4double& eloss, G <<
95 <<
96 inline void SampleGauss(CLHEP::HepRandomEngi <<
97 const G4double eav, <<
98 G4double& eloss); <<
99 <<
100 // particle properties <<
101 G4double particleMass = 0.0; <<
102 G4double m_Inv_particleMass = DBL_MAX; <<
103 G4double m_massrate = DBL_MAX; <<
104 G4double chargeSquare = 1.0; <<
105 <<
106 // material properties <<
107 G4double ipotFluct = 0.0; <<
108 G4double ipotLogFluct = 0.0; <<
109 G4double e0 = 0.0; <<
110 91
111 // model parameters << 92 const G4ParticleDefinition* particle;
112 G4double minNumberInteractionsBohr = 10.0; << 93 const G4Material* lastMaterial;
113 G4double minLoss; <<
114 G4double nmaxCont = 8.0; <<
115 G4double rate = 0.56; <<
116 G4double fw = 4.0; <<
117 G4double a0 = 42.0; <<
118 G4double w2 = 0.0; <<
119 G4double meanLoss = 0.0; <<
120 <<
121 const G4ParticleDefinition* particle = nullp <<
122 G4double* rndmarray = nullptr; <<
123 G4int sizearray = 30; <<
124 }; <<
125 94
126 //....oooOO0OOooo........oooOO0OOooo........oo << 95 G4double particleMass;
>> 96 G4double chargeSquare;
127 97
128 inline void << 98 // data members to speed up the fluctuation calculation
129 G4UniversalFluctuation::AddExcitation(CLHEP::H << 99 G4double ipotFluct;
130 const G4 << 100 G4double electronDensity;
131 G4double << 101 // G4double zeff;
132 G4double << 102
133 { << 103 G4double f1Fluct;
134 if(ax > nmaxCont) { << 104 G4double f2Fluct;
135 eav += ax*ex; << 105 G4double e1Fluct;
136 esig2 += ax*ex*ex; << 106 G4double e2Fluct;
137 } else { << 107 G4double rateFluct;
138 const G4int p = (G4int)G4Poisson(ax); << 108 G4double e1LogFluct;
139 if(p > 0) { eloss += ((p + 1) - 2.*rndm->f << 109 G4double e2LogFluct;
140 } << 110 G4double ipotLogFluct;
141 } << 111
142 << 112 G4double minNumberInteractionsBohr;
143 //....oooOO0OOooo........oooOO0OOooo........oo << 113 G4double theBohrBeta2;
144 << 114 G4double minLoss;
145 inline void << 115 G4double problim;
146 G4UniversalFluctuation::SampleGauss(CLHEP::Hep << 116 G4double sumalim;
147 const G4do << 117 G4double alim;
148 G4double& << 118 G4double nmaxCont1;
149 { << 119 G4double nmaxCont2;
150 G4double x = eav; << 120 };
151 const G4double sig = std::sqrt(esig2); <<
152 if(eav < 0.25*sig) { <<
153 x += (2.*rndm->flat() - 1.)*eav; <<
154 } else { <<
155 do { <<
156 x = G4RandGauss::shoot(rndm, eav, sig); <<
157 } while (x < 0.0 || x > 2*eav); <<
158 // Loop checking, 23-Feb-2016, Vladimir Iv <<
159 } <<
160 eloss += x; <<
161 } <<
162 121
163 //....oooOO0OOooo........oooOO0OOooo........oo 122 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
164 123
165 #endif 124 #endif
166 125
167 126