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25 // 25 //
>> 26 // $Id: G4UniversalFluctuation.hh 79188 2014-02-20 09:22:48Z gcosmo $
>> 27 //
26 // ------------------------------------------- 28 // -------------------------------------------------------------------
27 // 29 //
28 // GEANT4 Class header file 30 // GEANT4 Class header file
29 // 31 //
30 // 32 //
31 // File name: G4UniversalFluctuation 33 // File name: G4UniversalFluctuation
32 // 34 //
33 // Author: V.Ivanchenko make a class wi 35 // Author: V.Ivanchenko make a class with the Laszlo Urban model
34 // 36 //
35 // Creation date: 03.01.2002 37 // Creation date: 03.01.2002
36 // 38 //
37 // Modifications: 39 // Modifications:
38 // 40 //
>> 41 // 09-12-02 remove warnings (V.Ivanchenko)
>> 42 // 28-12-02 add method Dispersion (V.Ivanchenko)
>> 43 // 07-02-03 change signature (V.Ivanchenko)
>> 44 // 13-02-03 Add name (V.Ivanchenko)
>> 45 // 16-10-03 Changed interface to Initialisation (V.Ivanchenko)
>> 46 // 07-02-05 define problim = 5.e-3 (mma)
39 // 47 //
40 // Class Description: 48 // Class Description:
41 // 49 //
42 // Implementation of energy loss fluctuations << 50 // Implementation of energy loss fluctuations
43 51
44 // ------------------------------------------- 52 // -------------------------------------------------------------------
45 // 53 //
46 54
47 #ifndef G4UniversalFluctuation_h 55 #ifndef G4UniversalFluctuation_h
48 #define G4UniversalFluctuation_h 1 56 #define G4UniversalFluctuation_h 1
49 57
>> 58
50 #include "G4VEmFluctuationModel.hh" 59 #include "G4VEmFluctuationModel.hh"
51 #include "G4ParticleDefinition.hh" 60 #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 virtual G4double SampleFluctuations(const G4MaterialCutsCouple*,
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 virtual G4double Dispersion( const G4Material*,
71 const G4double, const G4 << 78 const G4DynamicParticle*,
72 const G4double) override << 79 G4double,
>> 80 G4double);
73 81
74 // Initialisation for a new particle type << 82 virtual void InitialiseMe(const G4ParticleDefinition*);
75 void InitialiseMe(const G4ParticleDefinition <<
76 83
77 // Initialisation prestep 84 // Initialisation prestep
78 void SetParticleAndCharge(const G4ParticleDe << 85 virtual void SetParticleAndCharge(const G4ParticleDefinition*, G4double q2);
79 G4double q2) override; << 86
>> 87 private:
80 88
81 // hide assignment operator 89 // hide assignment operator
82 G4UniversalFluctuation & operator= << 90 G4UniversalFluctuation & operator=(const G4UniversalFluctuation &right);
83 (const G4UniversalFluctuation &right) = dele << 91 G4UniversalFluctuation(const G4UniversalFluctuation&);
84 G4UniversalFluctuation(const G4UniversalFluc << 92
85 << 93 const G4ParticleDefinition* particle;
86 protected: << 94 const G4Material* lastMaterial;
87 << 95
88 virtual G4double SampleGlandz(CLHEP::HepRand << 96 G4double particleMass;
89 const G4Materi << 97
90 << 98 // Derived quantities
91 inline void AddExcitation(CLHEP::HepRandomEn << 99 G4double m_Inv_particleMass;
92 const G4double ax, << 100 G4double m_massrate;
93 G4double& eav, << 101 G4double chargeSquare;
94 G4double& eloss, G << 102
95 << 103 // data members to speed up the fluctuation calculation
96 inline void SampleGauss(CLHEP::HepRandomEngi << 104 G4double ipotFluct;
97 const G4double eav, << 105 G4double electronDensity;
98 G4double& eloss); << 106
99 << 107 G4double f1Fluct;
100 // particle properties << 108 G4double f2Fluct;
101 G4double particleMass = 0.0; << 109 G4double e1Fluct;
102 G4double m_Inv_particleMass = DBL_MAX; << 110 G4double e2Fluct;
103 G4double m_massrate = DBL_MAX; << 111 G4double e1LogFluct;
104 G4double chargeSquare = 1.0; << 112 G4double e2LogFluct;
105 << 113 G4double ipotLogFluct;
106 // material properties << 114 G4double e0;
107 G4double ipotFluct = 0.0; << 115 G4double esmall;
108 G4double ipotLogFluct = 0.0; <<
109 G4double e0 = 0.0; <<
110 116
111 // model parameters << 117 G4double e1,e2;
112 G4double minNumberInteractionsBohr = 10.0; << 118
>> 119 G4double minNumberInteractionsBohr;
>> 120 G4double theBohrBeta2;
113 G4double minLoss; 121 G4double minLoss;
114 G4double nmaxCont = 8.0; << 122 G4double nmaxCont;
115 G4double rate = 0.56; << 123 G4double rate,fw;
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 }; <<
125 124
126 //....oooOO0OOooo........oooOO0OOooo........oo <<
127 125
128 inline void << 126 };
129 G4UniversalFluctuation::AddExcitation(CLHEP::H <<
130 const G4 <<
131 G4double <<
132 G4double <<
133 { <<
134 if(ax > nmaxCont) { <<
135 eav += ax*ex; <<
136 esig2 += ax*ex*ex; <<
137 } else { <<
138 const G4int p = (G4int)G4Poisson(ax); <<
139 if(p > 0) { eloss += ((p + 1) - 2.*rndm->f <<
140 } <<
141 } <<
142 <<
143 //....oooOO0OOooo........oooOO0OOooo........oo <<
144 <<
145 inline void <<
146 G4UniversalFluctuation::SampleGauss(CLHEP::Hep <<
147 const G4do <<
148 G4double& <<
149 { <<
150 G4double x = eav; <<
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 } <<
162 127
163 //....oooOO0OOooo........oooOO0OOooo........oo 128 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
164 129
165 #endif 130 #endif
166 131
167 132