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25 // 25 //
>> 26 //
>> 27 // -------------------------------------------------------------------
>> 28 //
>> 29 //
>> 30 // GEANT4 Class header file
>> 31 //
>> 32 //
26 // File name: G4UrbanAdjointMscModel 33 // File name: G4UrbanAdjointMscModel
27 // 34 //
28 // Author: Laszlo Urban 35 // Author: Laszlo Urban
29 // 36 //
>> 37 // Creation date: 19.02.2013
>> 38 //
>> 39 // Created from G4UrbanAdjointMscModel96
>> 40 //
>> 41 // New parametrization for theta0
>> 42 // Correction for very small step length
>> 43 //
30 // Class Description: 44 // Class Description:
31 // Implementation of the model of multiple s << 45 //
32 // H.W.Lewis Phys Rev 78 (1950) 526 and L.Ur << 46 // Implementation of the model of multiple scattering based on
>> 47 // H.W.Lewis Phys Rev 78 (1950) 526 and L.Urban model
>> 48
33 // ------------------------------------------- 49 // -------------------------------------------------------------------
>> 50 //
34 51
35 #ifndef G4UrbanAdjointMscModel_h 52 #ifndef G4UrbanAdjointMscModel_h
36 #define G4UrbanAdjointMscModel_h 1 53 #define G4UrbanAdjointMscModel_h 1
37 54
38 #include "G4Electron.hh" << 55 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
39 #include "G4Exp.hh" << 56
40 #include "G4Log.hh" << 57 #include <CLHEP/Units/SystemOfUnits.h>
41 #include "G4MscStepLimitType.hh" << 58
42 #include "G4VMscModel.hh" 59 #include "G4VMscModel.hh"
>> 60 #include "G4MscStepLimitType.hh"
>> 61 #include "G4Log.hh"
>> 62 #include "G4Exp.hh"
>> 63 #include "G4Electron.hh"
>> 64
43 65
44 class G4LossTableManager; <<
45 class G4MaterialCutsCouple; <<
46 class G4ParticleChangeForMSC; 66 class G4ParticleChangeForMSC;
47 class G4ParticleDefinition; <<
48 class G4SafetyHelper; 67 class G4SafetyHelper;
>> 68 class G4LossTableManager;
49 69
50 //....oooOO0OOooo........oooOO0OOooo........oo 70 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
51 71
52 class G4UrbanAdjointMscModel : public G4VMscMo 72 class G4UrbanAdjointMscModel : public G4VMscModel
53 { 73 {
54 public: << 74
>> 75 public:
>> 76
55 explicit G4UrbanAdjointMscModel(const G4Stri 77 explicit G4UrbanAdjointMscModel(const G4String& nam = "UrbanMsc");
56 78
57 ~G4UrbanAdjointMscModel() override; << 79 virtual ~G4UrbanAdjointMscModel();
58 80
59 void Initialise(const G4ParticleDefinition*, << 81 virtual void Initialise(const G4ParticleDefinition*,
>> 82 const G4DataVector&) override;
60 83
61 void StartTracking(G4Track*) override; << 84 virtual void StartTracking(G4Track*) override;
62 85
63 G4double ComputeCrossSectionPerAtom(const G4 << 86 virtual G4double
64 G4double << 87 ComputeCrossSectionPerAtom(const G4ParticleDefinition* particle,
65 G4double << 88 G4double KineticEnergy,
66 G4double << 89 G4double AtomicNumber,
67 G4double << 90 G4double AtomicWeight=0.,
68 G4double << 91 G4double cut =0.,
>> 92 G4double emax=DBL_MAX) override;
69 93
70 G4ThreeVector& SampleScattering(const G4Thre << 94 virtual G4ThreeVector& SampleScattering(const G4ThreeVector&,
71 G4double saf << 95 G4double safety) override;
72 96
73 G4double ComputeTruePathLengthLimit(const G4 << 97 virtual G4double
74 G4double << 98 ComputeTruePathLengthLimit(const G4Track& track,
>> 99 G4double& currentMinimalStep) override;
75 100
76 G4double ComputeGeomPathLength(G4double true << 101 virtual G4double ComputeGeomPathLength(G4double truePathLength) override;
77 102
78 G4double ComputeTrueStepLength(G4double geom << 103 virtual G4double ComputeTrueStepLength(G4double geomStepLength) override;
79 104
80 G4double ComputeTheta0(G4double truePathLeng 105 G4double ComputeTheta0(G4double truePathLength, G4double KineticEnergy);
81 106
82 inline void SetNewDisplacementFlag(G4bool); 107 inline void SetNewDisplacementFlag(G4bool);
83 108
84 G4UrbanAdjointMscModel& operator=(const G4Ur << 109 private:
85 delete; <<
86 G4UrbanAdjointMscModel(const G4UrbanAdjointM <<
87 110
88 private: <<
89 G4double SampleCosineTheta(G4double trueStep 111 G4double SampleCosineTheta(G4double trueStepLength, G4double KineticEnergy);
90 112
91 void SampleDisplacement(G4double sinTheta, G 113 void SampleDisplacement(G4double sinTheta, G4double phi);
92 114
93 void SampleDisplacementNew(G4double sinTheta 115 void SampleDisplacementNew(G4double sinTheta, G4double phi);
94 116
95 inline void SetParticle(const G4ParticleDefi 117 inline void SetParticle(const G4ParticleDefinition*);
96 118
97 inline void UpdateCache(); 119 inline void UpdateCache();
98 120
99 inline G4double Randomizetlimit(); 121 inline G4double Randomizetlimit();
100 << 122
101 inline G4double SimpleScattering(G4double xm 123 inline G4double SimpleScattering(G4double xmeanth, G4double x2meanth);
102 124
103 CLHEP::HepRandomEngine* rndmEngineMod; << 125 // hide assignment operator
>> 126 G4UrbanAdjointMscModel & operator=(const G4UrbanAdjointMscModel &right) = delete;
>> 127 G4UrbanAdjointMscModel(const G4UrbanAdjointMscModel&) = delete;
>> 128
>> 129 CLHEP::HepRandomEngine* rndmEngineMod;
104 130
105 const G4ParticleDefinition* particle; 131 const G4ParticleDefinition* particle;
106 const G4ParticleDefinition* positron; 132 const G4ParticleDefinition* positron;
107 G4ParticleChangeForMSC* fParticleChange; << 133 G4ParticleChangeForMSC* fParticleChange;
108 134
109 const G4MaterialCutsCouple* couple; 135 const G4MaterialCutsCouple* couple;
110 G4LossTableManager* theManager; << 136 G4LossTableManager* theManager;
111 137
112 G4double mass; 138 G4double mass;
113 G4double charge, ChargeSquare; << 139 G4double charge,ChargeSquare;
114 G4double masslimite, lambdalimit, fr; << 140 G4double masslimite,lambdalimit,fr;
115 141
116 G4double taubig; 142 G4double taubig;
117 G4double tausmall; 143 G4double tausmall;
118 G4double taulim; 144 G4double taulim;
119 G4double currentTau; 145 G4double currentTau;
120 G4double tlimit; 146 G4double tlimit;
121 G4double tlimitmin; 147 G4double tlimitmin;
122 G4double tlimitminfix, tlimitminfix2; << 148 G4double tlimitminfix,tlimitminfix2;
123 G4double tgeom; 149 G4double tgeom;
124 150
125 G4double geombig; 151 G4double geombig;
126 G4double geommin; 152 G4double geommin;
127 G4double geomlimit; 153 G4double geomlimit;
128 G4double skindepth; 154 G4double skindepth;
129 G4double smallstep; 155 G4double smallstep;
130 156
131 G4double presafety; 157 G4double presafety;
132 158
133 G4double lambda0; 159 G4double lambda0;
134 G4double lambdaeff; 160 G4double lambdaeff;
135 G4double tPathLength; 161 G4double tPathLength;
136 G4double zPathLength; 162 G4double zPathLength;
137 G4double par1, par2, par3; << 163 G4double par1,par2,par3;
138 164
139 G4double stepmin; 165 G4double stepmin;
140 166
141 G4double currentKinEnergy; 167 G4double currentKinEnergy;
142 G4double currentRange; << 168 G4double currentRange;
143 G4double rangeinit; 169 G4double rangeinit;
144 G4double currentRadLength; 170 G4double currentRadLength;
145 171
>> 172 G4int currentMaterialIndex;
>> 173
146 G4double Zold; 174 G4double Zold;
147 G4double Zeff, Z2, Z23, lnZ; << 175 G4double Zeff,Z2,Z23,lnZ;
148 G4double coeffth1, coeffth2; << 176 G4double coeffth1,coeffth2;
149 G4double coeffc1, coeffc2, coeffc3, coeffc4; << 177 G4double coeffc1,coeffc2,coeffc3,coeffc4;
150 178
151 G4double rangecut; << 179 G4bool firstStep;
152 G4double drr, finalr; << 180 G4bool insideskin;
153 181
154 G4int currentMaterialIndex; << 182 G4bool latDisplasmentbackup ;
>> 183 G4bool displacementFlag;
155 184
156 G4bool firstStep; << 185 G4double rangecut;
157 G4bool insideskin; << 186 G4double drr,finalr;
158 187
159 G4bool latDisplasmentbackup; <<
160 G4bool displacementFlag; <<
161 }; 188 };
162 189
163 //....oooOO0OOooo........oooOO0OOooo........oo 190 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 191 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 192
>> 193 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 194
164 inline void G4UrbanAdjointMscModel::SetNewDisp 195 inline void G4UrbanAdjointMscModel::SetNewDisplacementFlag(G4bool val)
165 { 196 {
166 displacementFlag = val; 197 displacementFlag = val;
167 } 198 }
168 199
169 inline void G4UrbanAdjointMscModel::SetParticl << 200 inline
170 { << 201 void G4UrbanAdjointMscModel::SetParticle(const G4ParticleDefinition* p)
171 const G4ParticleDefinition* p1 = p; << 202 { const G4ParticleDefinition* p1 =p;
172 << 203
173 if(p->GetParticleName() == "adj_e-") << 204 if (p->GetParticleName() =="adj_e-") p1= G4Electron::Electron();
174 p1 = G4Electron::Electron(); << 205
175 << 206 if (p1 != particle) {
176 if(p1 != particle) << 207 particle = p1;
177 { << 208 mass = p1->GetPDGMass();
178 particle = p1; << 209 charge = p1->GetPDGCharge()/CLHEP::eplus;
179 mass = p1->GetPDGMass(); << 210 ChargeSquare = charge*charge;
180 charge = p1->GetPDGCharge() / CLHEP: <<
181 ChargeSquare = charge * charge; <<
182 } 211 }
183 } 212 }
184 213
185 //....oooOO0OOooo........oooOO0OOooo........oo 214 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 215
186 inline G4double G4UrbanAdjointMscModel::Random 216 inline G4double G4UrbanAdjointMscModel::Randomizetlimit()
187 { 217 {
188 G4double temptlimit = tlimit; 218 G4double temptlimit = tlimit;
189 if(tlimit > tlimitmin) 219 if(tlimit > tlimitmin)
190 { 220 {
191 G4double delta = tlimit - tlimitmin; << 221 G4double delta = tlimit-tlimitmin;
192 do << 222 do {
193 { << 223 temptlimit = G4RandGauss::shoot(rndmEngineMod,tlimit,0.1*delta);
194 temptlimit = G4RandGauss::shoot(rndmEngi << 224 // Loop checking, 10-Apr-2016, Laszlo Urban
195 // Loop checking, 10-Apr-2016, Laszlo Ur << 225 } while ((temptlimit < tlimit-delta) ||
196 } while((temptlimit < tlimit - delta) || ( << 226 (temptlimit > tlimit+delta));
197 } <<
198 else <<
199 { <<
200 temptlimit = tlimitmin; <<
201 } 227 }
>> 228 else { temptlimit = tlimitmin; }
202 229
203 return temptlimit; 230 return temptlimit;
204 } 231 }
205 232
206 //....oooOO0OOooo........oooOO0OOooo........oo 233 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 234
207 inline void G4UrbanAdjointMscModel::UpdateCach 235 inline void G4UrbanAdjointMscModel::UpdateCache()
208 { 236 {
209 lnZ = G4Log(Zeff); 237 lnZ = G4Log(Zeff);
210 // correction in theta0 formula 238 // correction in theta0 formula
211 G4double w = G4Exp(lnZ / 6.); << 239 G4double w = G4Exp(lnZ/6.);
212 G4double facz = 0.990395 + w * (-0.168386 + << 240 G4double facz = 0.990395+w*(-0.168386+w*0.093286) ;
213 coeffth1 = facz * (1. - 8.7780e-2 / Zef << 241 coeffth1 = facz*(1. - 8.7780e-2/Zeff);
214 coeffth2 = facz * (4.0780e-2 + 1.7315e- << 242 coeffth2 = facz*(4.0780e-2 + 1.7315e-4*Zeff);
215 243
216 // tail parameters 244 // tail parameters
217 G4double Z13 = w * w; << 245 G4double Z13 = w*w;
218 coeffc1 = 2.3785 - Z13 * (4.1981e-1 - Z << 246 coeffc1 = 2.3785 - Z13*(4.1981e-1 - Z13*6.3100e-2);
219 coeffc2 = 4.7526e-1 + Z13 * (1.7694 - Z << 247 coeffc2 = 4.7526e-1 + Z13*(1.7694 - Z13*3.3885e-1);
220 coeffc3 = 2.3683e-1 - Z13 * (1.8111 - Z << 248 coeffc3 = 2.3683e-1 - Z13*(1.8111 - Z13*3.2774e-1);
221 coeffc4 = 1.7888e-2 + Z13 * (1.9659e-2 << 249 coeffc4 = 1.7888e-2 + Z13*(1.9659e-2 - Z13*2.6664e-3);
222 << 250
223 Z2 = Zeff * Zeff; << 251 Z2 = Zeff*Zeff;
224 Z23 = Z13 * Z13; << 252 Z23 = Z13*Z13;
225 << 253
226 Zold = Zeff; 254 Zold = Zeff;
227 } 255 }
228 256
229 //....oooOO0OOooo........oooOO0OOooo........oo 257 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
230 inline G4double G4UrbanAdjointMscModel::Simple << 258
231 << 259 inline
>> 260 G4double G4UrbanAdjointMscModel::SimpleScattering(G4double xmeanth, G4double x2meanth)
232 { 261 {
233 // 'large angle scattering' 262 // 'large angle scattering'
234 // 2 model functions with correct xmean and 263 // 2 model functions with correct xmean and x2mean
235 G4double a = << 264 G4double a = (2.*xmeanth+9.*x2meanth-3.)/(2.*xmeanth-3.*x2meanth+1.);
236 (2. * xmeanth + 9. * x2meanth - 3.) / (2. << 265 G4double prob = (a+2.)*xmeanth/a;
237 G4double prob = (a + 2.) * xmeanth / a; <<
238 266
239 // sampling 267 // sampling
240 G4double cth = 1.; 268 G4double cth = 1.;
241 if(rndmEngineMod->flat() < prob) << 269 if(rndmEngineMod->flat() < prob) {
242 { << 270 cth = -1.+2.*G4Exp(G4Log(rndmEngineMod->flat())/(a+1.));
243 cth = -1. + 2. * G4Exp(G4Log(rndmEngineMod << 271 } else {
244 } << 272 cth = -1.+2.*rndmEngineMod->flat();
245 else <<
246 { <<
247 cth = -1. + 2. * rndmEngineMod->flat(); <<
248 } 273 }
249 return cth; 274 return cth;
250 } 275 }
251 276
>> 277 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 278
>> 279
252 #endif 280 #endif
>> 281
253 282