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25 // 25 //
>> 26 // $Id: G4UniversalFluctuation.hh 101807 2016-11-30 13:42:28Z gunter $
>> 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 problem = 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" 61 #include "G4Poisson.hh"
53 #include <CLHEP/Random/RandomEngine.h> 62 #include <CLHEP/Random/RandomEngine.h>
54 63
55 class G4UniversalFluctuation : public G4VEmFlu 64 class G4UniversalFluctuation : public G4VEmFluctuationModel
56 { 65 {
57 66
58 public: 67 public:
59 68
60 explicit G4UniversalFluctuation(const G4Stri 69 explicit G4UniversalFluctuation(const G4String& nam = "UniFluc");
61 70
62 ~G4UniversalFluctuation() override; << 71 virtual ~G4UniversalFluctuation();
63 72
64 G4double SampleFluctuations(const G4Material << 73 virtual G4double SampleFluctuations(const G4MaterialCutsCouple*,
65 const G4DynamicParticle*, << 74 const G4DynamicParticle*,
66 const G4double, << 75 G4double,
67 const G4double, const G4double) ov << 76 G4double,
68 << 77 G4double) override;
69 G4double Dispersion(const G4Material*, << 78
70 const G4DynamicParticle*, << 79 virtual G4double Dispersion(const G4Material*,
71 const G4double, const G4 << 80 const G4DynamicParticle*,
72 const G4double) override << 81 G4double,
>> 82 G4double) override;
73 83
74 // Initialisation for a new particle type << 84 virtual void InitialiseMe(const G4ParticleDefinition*) final;
75 void InitialiseMe(const G4ParticleDefinition <<
76 85
77 // Initialisation prestep 86 // Initialisation prestep
78 void SetParticleAndCharge(const G4ParticleDe << 87 virtual void SetParticleAndCharge(const G4ParticleDefinition*,
79 G4double q2) override; << 88 G4double q2) final;
80 <<
81 // hide assignment operator <<
82 G4UniversalFluctuation & operator= <<
83 (const G4UniversalFluctuation &right) = dele <<
84 G4UniversalFluctuation(const G4UniversalFluc <<
85 <<
86 protected: <<
87 89
88 virtual G4double SampleGlandz(CLHEP::HepRand << 90 private:
89 const G4Materi <<
90 91
91 inline void AddExcitation(CLHEP::HepRandomEn 92 inline void AddExcitation(CLHEP::HepRandomEngine* rndm,
92 const G4double ax, << 93 G4double a, G4double e, G4double& eav,
93 G4double& eav, <<
94 G4double& eloss, G 94 G4double& eloss, G4double& esig2);
95 95
96 inline void SampleGauss(CLHEP::HepRandomEngi 96 inline void SampleGauss(CLHEP::HepRandomEngine* rndm,
97 const G4double eav, << 97 G4double eav, G4double esig2,
98 G4double& eloss); 98 G4double& eloss);
99 99
100 // particle properties << 100 // hide assignment operator
101 G4double particleMass = 0.0; << 101 G4UniversalFluctuation & operator=(const G4UniversalFluctuation &right) = delete;
102 G4double m_Inv_particleMass = DBL_MAX; << 102 G4UniversalFluctuation(const G4UniversalFluctuation&) = delete;
103 G4double m_massrate = DBL_MAX; << 103
104 G4double chargeSquare = 1.0; << 104 const G4ParticleDefinition* particle;
105 << 105 const G4Material* lastMaterial;
106 // material properties << 106
107 G4double ipotFluct = 0.0; << 107 G4double particleMass;
108 G4double ipotLogFluct = 0.0; << 108
109 G4double e0 = 0.0; << 109 // Derived quantities
>> 110 G4double m_Inv_particleMass;
>> 111 G4double m_massrate;
>> 112 G4double chargeSquare;
>> 113
>> 114 // data members to speed up the fluctuation calculation
>> 115 G4double ipotFluct;
>> 116 G4double electronDensity;
>> 117
>> 118 G4double f1Fluct;
>> 119 G4double f2Fluct;
>> 120 G4double e1Fluct;
>> 121 G4double e2Fluct;
>> 122 G4double e1LogFluct;
>> 123 G4double e2LogFluct;
>> 124 G4double ipotLogFluct;
>> 125 G4double e0;
>> 126 G4double esmall;
110 127
111 // model parameters << 128 G4double e1,e2;
112 G4double minNumberInteractionsBohr = 10.0; << 129
>> 130 G4double minNumberInteractionsBohr;
113 G4double minLoss; 131 G4double minLoss;
114 G4double nmaxCont = 8.0; << 132 G4double nmaxCont;
115 G4double rate = 0.56; << 133 G4double rate,fw;
116 G4double fw = 4.0; << 134
117 G4double a0 = 42.0; << 135 G4int sizearray;
118 G4double w2 = 0.0; << 136 G4double* rndmarray;
119 G4double meanLoss = 0.0; << 137
120 <<
121 const G4ParticleDefinition* particle = nullp <<
122 G4double* rndmarray = nullptr; <<
123 G4int sizearray = 30; <<
124 }; 138 };
125 139
126 //....oooOO0OOooo........oooOO0OOooo........oo 140 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
127 141
>> 142
128 inline void 143 inline void
129 G4UniversalFluctuation::AddExcitation(CLHEP::H 144 G4UniversalFluctuation::AddExcitation(CLHEP::HepRandomEngine* rndm,
130 const G4 << 145 G4double ax, G4double ex, G4double& eav,
131 G4double <<
132 G4double 146 G4double& eloss, G4double& esig2)
133 { 147 {
134 if(ax > nmaxCont) { 148 if(ax > nmaxCont) {
135 eav += ax*ex; 149 eav += ax*ex;
136 esig2 += ax*ex*ex; 150 esig2 += ax*ex*ex;
137 } else { << 151 } else if(ax > 0.) {
138 const G4int p = (G4int)G4Poisson(ax); << 152 G4double p = G4double(G4Poisson(ax));
139 if(p > 0) { eloss += ((p + 1) - 2.*rndm->f << 153 eloss += p*ex;
>> 154 if(p > 0.) { eloss += (1.-2.*rndm->flat())*ex; }
140 } 155 }
141 } 156 }
142 157
143 //....oooOO0OOooo........oooOO0OOooo........oo <<
144 <<
145 inline void 158 inline void
146 G4UniversalFluctuation::SampleGauss(CLHEP::Hep 159 G4UniversalFluctuation::SampleGauss(CLHEP::HepRandomEngine* rndm,
147 const G4do << 160 G4double eav, G4double esig2,
148 G4double& 161 G4double& eloss)
149 { 162 {
150 G4double x = eav; 163 G4double x = eav;
151 const G4double sig = std::sqrt(esig2); << 164 if(esig2 > 0.0) {
152 if(eav < 0.25*sig) { << 165 G4double sig = std::sqrt(esig2);
153 x += (2.*rndm->flat() - 1.)*eav; << 166 G4double deltae = std::min(4.*sig, eav);
154 } else { << 167 if(deltae < 0.25*sig) {
155 do { << 168 x += (2.*rndm->flat() - 1.)*deltae;
156 x = G4RandGauss::shoot(rndm, eav, sig); << 169 } else {
157 } while (x < 0.0 || x > 2*eav); << 170 do {
158 // Loop checking, 23-Feb-2016, Vladimir Iv << 171 x = G4RandGauss::shoot(rndm, eav, sig);
>> 172 } while (x < eav-deltae || x > eav+deltae);
>> 173 // Loop checking, 23-Feb-2016, Vladimir Ivanchenko
>> 174 }
159 } 175 }
160 eloss += x; 176 eloss += x;
161 } 177 }
162 <<
163 //....oooOO0OOooo........oooOO0OOooo........oo <<
164 178
165 #endif 179 #endif
166 180
167 181