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25 // 25 //
>> 26 // $Id: $
>> 27 // GEANT4 tag $Name: $
>> 28 //
26 // ------------------------------------------- 29 // -------------------------------------------------------------------
27 // 30 //
28 // GEANT4 Class file 31 // GEANT4 Class file
29 // 32 //
30 // 33 //
31 // File name: G4UrbanMscModel 34 // File name: G4UrbanMscModel
32 // 35 //
33 // Author: Laszlo Urban 36 // Author: Laszlo Urban
34 // 37 //
35 // Creation date: 19.02.2013 38 // Creation date: 19.02.2013
36 // 39 //
37 // Created from G4UrbanMscModel96 40 // Created from G4UrbanMscModel96
38 // 41 //
39 // New parametrization for theta0 42 // New parametrization for theta0
40 // Correction for very small step length 43 // Correction for very small step length
41 // 44 //
42 // Class Description: 45 // Class Description:
43 // 46 //
44 // Implementation of the model of multiple sca 47 // Implementation of the model of multiple scattering based on
45 // H.W.Lewis Phys Rev 78 (1950) 526 and others 48 // H.W.Lewis Phys Rev 78 (1950) 526 and others
46 49
47 // ------------------------------------------- 50 // -------------------------------------------------------------------
48 // In its present form the model can be used 51 // In its present form the model can be used for simulation
49 // of the e-/e+ multiple scattering 52 // of the e-/e+ multiple scattering
>> 53 //
50 54
51 55
52 //....oooOO0OOooo........oooOO0OOooo........oo 56 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
53 //....oooOO0OOooo........oooOO0OOooo........oo 57 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
54 58
55 #include "G4UrbanMscModel.hh" 59 #include "G4UrbanMscModel.hh"
56 #include "G4PhysicalConstants.hh" 60 #include "G4PhysicalConstants.hh"
57 #include "G4SystemOfUnits.hh" 61 #include "G4SystemOfUnits.hh"
58 #include "Randomize.hh" 62 #include "Randomize.hh"
59 #include "G4Positron.hh" << 63 #include "G4Electron.hh"
60 #include "G4EmParameters.hh" << 64 #include "G4LossTableManager.hh"
61 #include "G4ParticleChangeForMSC.hh" 65 #include "G4ParticleChangeForMSC.hh"
62 #include "G4ProductionCutsTable.hh" <<
63 66
64 #include "G4Poisson.hh" 67 #include "G4Poisson.hh"
65 #include "G4Pow.hh" 68 #include "G4Pow.hh"
>> 69 #include "globals.hh"
66 #include "G4Log.hh" 70 #include "G4Log.hh"
67 #include "G4Exp.hh" 71 #include "G4Exp.hh"
68 #include "G4AutoLock.hh" <<
69 72
70 //....oooOO0OOooo........oooOO0OOooo........oo 73 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
71 74
72 std::vector<G4UrbanMscModel::mscData*> G4Urban << 75 using namespace std;
73 76
74 namespace << 77 static const G4double Tlim = 10.*CLHEP::MeV;
75 { << 78 static const G4double sigmafactor =
76 G4Mutex theUrbanMutex = G4MUTEX_INITIALIZER; << 79 CLHEP::twopi*CLHEP::classic_electr_radius*CLHEP::classic_electr_radius;
77 } << 80 static const G4double epsfactor = 2.*CLHEP::electron_mass_c2*
>> 81 CLHEP::electron_mass_c2*CLHEP::Bohr_radius*CLHEP::Bohr_radius
>> 82 /(CLHEP::hbarc*CLHEP::hbarc);
>> 83 static const G4double beta2lim = Tlim*(Tlim+2.*CLHEP::electron_mass_c2)/
>> 84 ((Tlim+CLHEP::electron_mass_c2)*(Tlim+CLHEP::electron_mass_c2));
>> 85 static const G4double bg2lim = Tlim*(Tlim+2.*CLHEP::electron_mass_c2)/
>> 86 (CLHEP::electron_mass_c2*CLHEP::electron_mass_c2);
>> 87
>> 88 static const G4double sig0[15] = {
>> 89 0.2672*CLHEP::barn, 0.5922*CLHEP::barn, 2.653*CLHEP::barn, 6.235*CLHEP::barn,
>> 90 11.69*CLHEP::barn , 13.24*CLHEP::barn , 16.12*CLHEP::barn, 23.00*CLHEP::barn,
>> 91 35.13*CLHEP::barn , 39.95*CLHEP::barn , 50.85*CLHEP::barn, 67.19*CLHEP::barn,
>> 92 91.15*CLHEP::barn , 104.4*CLHEP::barn , 113.1*CLHEP::barn};
>> 93
>> 94 static const G4double Tdat[22] = {
>> 95 100*CLHEP::eV, 200*CLHEP::eV, 400*CLHEP::eV, 700*CLHEP::eV,
>> 96 1*CLHEP::keV, 2*CLHEP::keV, 4*CLHEP::keV, 7*CLHEP::keV,
>> 97 10*CLHEP::keV, 20*CLHEP::keV, 40*CLHEP::keV, 70*CLHEP::keV,
>> 98 100*CLHEP::keV, 200*CLHEP::keV, 400*CLHEP::keV, 700*CLHEP::keV,
>> 99 1*CLHEP::MeV, 2*CLHEP::MeV, 4*CLHEP::MeV, 7*CLHEP::MeV,
>> 100 10*CLHEP::MeV, 20*CLHEP::MeV};
78 101
79 //....oooOO0OOooo........oooOO0OOooo........oo 102 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
80 103
81 G4UrbanMscModel::G4UrbanMscModel(const G4Strin 104 G4UrbanMscModel::G4UrbanMscModel(const G4String& nam)
82 : G4VMscModel(nam) 105 : G4VMscModel(nam)
83 { 106 {
84 masslimite = 0.6*CLHEP::MeV; << 107 masslimite = 0.6*MeV;
>> 108 lambdalimit = 1.*mm;
85 fr = 0.02; 109 fr = 0.02;
86 taubig = 8.0; 110 taubig = 8.0;
87 tausmall = 1.e-16; 111 tausmall = 1.e-16;
88 taulim = 1.e-6; 112 taulim = 1.e-6;
89 currentTau = taulim; 113 currentTau = taulim;
90 tlimitminfix = 0.01*CLHEP::nm; << 114 tlimitminfix = 0.01*nm;
91 tlimitminfix2 = 1.*CLHEP::nm; << 115 tlimitminfix2 = 1.*nm;
92 stepmin = tlimitminfix; 116 stepmin = tlimitminfix;
93 smallstep = 1.e10; 117 smallstep = 1.e10;
94 currentRange = 0.; << 118 currentRange = 0. ;
95 rangeinit = 0.; 119 rangeinit = 0.;
96 tlimit = 1.e10*CLHEP::mm; << 120 tlimit = 1.e10*mm;
97 tlimitmin = 10.*tlimitminfix; 121 tlimitmin = 10.*tlimitminfix;
98 tgeom = 1.e50*CLHEP::mm; << 122 tgeom = 1.e50*mm;
99 geombig = tgeom; << 123 geombig = 1.e50*mm;
100 geommin = 1.e-3*CLHEP::mm; << 124 geommin = 1.e-3*mm;
101 geomlimit = geombig; 125 geomlimit = geombig;
102 presafety = 0.; << 126 presafety = 0.*mm;
103 127
104 positron = G4Positron::Positron(); << 128 y = 0.;
105 rndmEngineMod = G4Random::getTheEngine(); <<
106 129
107 drr = 0.35; << 130 Zold = 0.;
108 finalr = 10.*CLHEP::um; << 131 Zeff = 1.;
109 << 132 Z2 = 1.;
110 tlow = 5.*CLHEP::keV; << 133 Z23 = 1.;
111 invmev = 1.0/CLHEP::MeV; << 134 lnZ = 0.;
>> 135 coeffth1 = 0.;
>> 136 coeffth2 = 0.;
>> 137 coeffc1 = 0.;
>> 138 coeffc2 = 0.;
>> 139 coeffc3 = 0.;
>> 140 coeffc4 = 0.;
>> 141
>> 142 theta0max = pi/6.;
>> 143 rellossmax = 0.50;
>> 144 third = 1./3.;
>> 145 particle = 0;
>> 146 theManager = G4LossTableManager::Instance();
>> 147 firstStep = true;
>> 148 inside = false;
>> 149 insideskin = false;
>> 150 latDisplasmentbackup = false;
>> 151
>> 152 rangecut = geombig;
>> 153 drr = 0.35 ;
>> 154 finalr = 10.*um ;
112 155
113 skindepth = skin*stepmin; 156 skindepth = skin*stepmin;
114 157
115 mass = CLHEP::proton_mass_c2; << 158 mass = proton_mass_c2;
116 charge = chargeSquare = 1.0; << 159 charge = ChargeSquare = 1.0;
117 currentKinEnergy = currentRadLength = lambda 160 currentKinEnergy = currentRadLength = lambda0 = lambdaeff = tPathLength
118 = zPathLength = par1 = par2 = par3 = rndma << 161 = zPathLength = par1 = par2 = par3 = 0;
119 currentLogKinEnergy = LOG_EKIN_MIN; << 162
>> 163 currentMaterialIndex = -1;
>> 164 fParticleChange = 0;
>> 165 couple = 0;
120 } 166 }
121 167
122 //....oooOO0OOooo........oooOO0OOooo........oo 168 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
123 169
124 G4UrbanMscModel::~G4UrbanMscModel() 170 G4UrbanMscModel::~G4UrbanMscModel()
125 { << 171 {}
126 if(isFirstInstance) { <<
127 for(auto const & ptr : msc) { delete ptr; <<
128 msc.clear(); <<
129 } <<
130 } <<
131 172
132 //....oooOO0OOooo........oooOO0OOooo........oo 173 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
133 174
134 void G4UrbanMscModel::Initialise(const G4Parti 175 void G4UrbanMscModel::Initialise(const G4ParticleDefinition* p,
135 const G4DataV << 176 const G4DataVector&)
136 { 177 {
>> 178 skindepth = skin*stepmin;
>> 179
137 // set values of some data members 180 // set values of some data members
138 SetParticle(p); 181 SetParticle(p);
>> 182 /*
>> 183 if(p->GetPDGMass() > MeV) {
>> 184 G4cout << "### WARNING: G4UrbanMscModel model is used for "
>> 185 << p->GetParticleName() << " !!! " << G4endl;
>> 186 G4cout << "### This model should be used only for e+-"
>> 187 << G4endl;
>> 188 }
>> 189 */
139 fParticleChange = GetParticleChangeForMSC(p) 190 fParticleChange = GetParticleChangeForMSC(p);
140 InitialiseParameters(p); <<
141 191
142 latDisplasmentbackup = latDisplasment; 192 latDisplasmentbackup = latDisplasment;
143 193
144 // if model is locked parameters should be d << 194 //G4cout << "### G4UrbanMscModel::Initialise done!" << G4endl;
145 if(!IsLocked()) { <<
146 dispAlg96 = G4EmParameters::Instance()->La <<
147 fPosiCorrection = G4EmParameters::Instance <<
148 } <<
149 <<
150 // initialise cache only once <<
151 if(0 == msc.size()) { <<
152 G4AutoLock l(&theUrbanMutex); <<
153 if(0 == msc.size()) { <<
154 isFirstInstance = true; <<
155 msc.resize(1, nullptr); <<
156 } <<
157 l.unlock(); <<
158 } <<
159 // initialise cache for each new run <<
160 if(isFirstInstance) { InitialiseModelCache() <<
161 <<
162 /* <<
163 G4cout << "### G4UrbanMscModel::Initialise d <<
164 << p->GetParticleName() << " type= " << ste <<
165 G4cout << " RangeFact= " << facrange << " <<
166 << " SafetyFact= " << facsafety << " Lambda <<
167 << G4endl; <<
168 */ <<
169 } 195 }
170 196
171 //....oooOO0OOooo........oooOO0OOooo........oo 197 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
172 198
173 G4double G4UrbanMscModel::ComputeCrossSectionP 199 G4double G4UrbanMscModel::ComputeCrossSectionPerAtom(
174 const G4ParticleD 200 const G4ParticleDefinition* part,
175 G4double ki << 201 G4double KineticEnergy,
176 G4double at << 202 G4double AtomicNumber,G4double,
177 G4double, G << 203 G4double, G4double)
178 { 204 {
179 static const G4double epsmin = 1.e-4 , epsma 205 static const G4double epsmin = 1.e-4 , epsmax = 1.e10;
180 206
181 static const G4double Zdat[15] = { 4., 6., 207 static const G4double Zdat[15] = { 4., 6., 13., 20., 26., 29., 32., 38.,47.,
182 50., 56., << 208 50., 56., 64., 74., 79., 82. };
183 209
184 // corr. factors for e-/e+ lambda for T <= T 210 // corr. factors for e-/e+ lambda for T <= Tlim
185 static const G4double celectron[15][22] = 211 static const G4double celectron[15][22] =
186 {{1.125,1.072,1.051,1.047,1.047,1.05 212 {{1.125,1.072,1.051,1.047,1.047,1.050,1.052,1.054,
187 1.054,1.057,1.062,1.069,1.075,1.09 213 1.054,1.057,1.062,1.069,1.075,1.090,1.105,1.111,
188 1.112,1.108,1.100,1.093,1.089,1.08 214 1.112,1.108,1.100,1.093,1.089,1.087 },
189 {1.408,1.246,1.143,1.096,1.077,1.05 215 {1.408,1.246,1.143,1.096,1.077,1.059,1.053,1.051,
190 1.052,1.053,1.058,1.065,1.072,1.08 216 1.052,1.053,1.058,1.065,1.072,1.087,1.101,1.108,
191 1.109,1.105,1.097,1.090,1.086,1.08 217 1.109,1.105,1.097,1.090,1.086,1.082 },
192 {2.833,2.268,1.861,1.612,1.486,1.30 218 {2.833,2.268,1.861,1.612,1.486,1.309,1.204,1.156,
193 1.136,1.114,1.106,1.106,1.109,1.11 219 1.136,1.114,1.106,1.106,1.109,1.119,1.129,1.132,
194 1.131,1.124,1.113,1.104,1.099,1.09 220 1.131,1.124,1.113,1.104,1.099,1.098 },
195 {3.879,3.016,2.380,2.007,1.818,1.53 221 {3.879,3.016,2.380,2.007,1.818,1.535,1.340,1.236,
196 1.190,1.133,1.107,1.099,1.098,1.10 222 1.190,1.133,1.107,1.099,1.098,1.103,1.110,1.113,
197 1.112,1.105,1.096,1.089,1.085,1.09 223 1.112,1.105,1.096,1.089,1.085,1.098 },
198 {6.937,4.330,2.886,2.256,1.987,1.62 224 {6.937,4.330,2.886,2.256,1.987,1.628,1.395,1.265,
199 1.203,1.122,1.080,1.065,1.061,1.06 225 1.203,1.122,1.080,1.065,1.061,1.063,1.070,1.073,
200 1.073,1.070,1.064,1.059,1.056,1.05 226 1.073,1.070,1.064,1.059,1.056,1.056 },
201 {9.616,5.708,3.424,2.551,2.204,1.76 227 {9.616,5.708,3.424,2.551,2.204,1.762,1.485,1.330,
202 1.256,1.155,1.099,1.077,1.070,1.06 228 1.256,1.155,1.099,1.077,1.070,1.068,1.072,1.074,
203 1.074,1.070,1.063,1.059,1.056,1.05 229 1.074,1.070,1.063,1.059,1.056,1.052 },
204 {11.72,6.364,3.811,2.806,2.401,1.88 230 {11.72,6.364,3.811,2.806,2.401,1.884,1.564,1.386,
205 1.300,1.180,1.112,1.082,1.073,1.06 231 1.300,1.180,1.112,1.082,1.073,1.066,1.068,1.069,
206 1.068,1.064,1.059,1.054,1.051,1.05 232 1.068,1.064,1.059,1.054,1.051,1.050 },
207 {18.08,8.601,4.569,3.183,2.662,2.02 233 {18.08,8.601,4.569,3.183,2.662,2.025,1.646,1.439,
208 1.339,1.195,1.108,1.068,1.053,1.04 234 1.339,1.195,1.108,1.068,1.053,1.040,1.039,1.039,
209 1.039,1.037,1.034,1.031,1.030,1.03 235 1.039,1.037,1.034,1.031,1.030,1.036 },
210 {18.22,10.48,5.333,3.713,3.115,2.36 236 {18.22,10.48,5.333,3.713,3.115,2.367,1.898,1.631,
211 1.498,1.301,1.171,1.105,1.077,1.04 237 1.498,1.301,1.171,1.105,1.077,1.048,1.036,1.033,
212 1.031,1.028,1.024,1.022,1.021,1.02 238 1.031,1.028,1.024,1.022,1.021,1.024 },
213 {14.14,10.65,5.710,3.929,3.266,2.45 239 {14.14,10.65,5.710,3.929,3.266,2.453,1.951,1.669,
214 1.528,1.319,1.178,1.106,1.075,1.04 240 1.528,1.319,1.178,1.106,1.075,1.040,1.027,1.022,
215 1.020,1.017,1.015,1.013,1.013,1.02 241 1.020,1.017,1.015,1.013,1.013,1.020 },
216 {14.11,11.73,6.312,4.240,3.478,2.56 242 {14.11,11.73,6.312,4.240,3.478,2.566,2.022,1.720,
217 1.569,1.342,1.186,1.102,1.065,1.02 243 1.569,1.342,1.186,1.102,1.065,1.022,1.003,0.997,
218 0.995,0.993,0.993,0.993,0.993,1.01 244 0.995,0.993,0.993,0.993,0.993,1.011 },
219 {22.76,20.01,8.835,5.287,4.144,2.90 245 {22.76,20.01,8.835,5.287,4.144,2.901,2.219,1.855,
220 1.677,1.410,1.224,1.121,1.073,1.01 246 1.677,1.410,1.224,1.121,1.073,1.014,0.986,0.976,
221 0.974,0.972,0.973,0.974,0.975,0.98 247 0.974,0.972,0.973,0.974,0.975,0.987 },
222 {50.77,40.85,14.13,7.184,5.284,3.43 248 {50.77,40.85,14.13,7.184,5.284,3.435,2.520,2.059,
223 1.837,1.512,1.283,1.153,1.091,1.01 249 1.837,1.512,1.283,1.153,1.091,1.010,0.969,0.954,
224 0.950,0.947,0.949,0.952,0.954,0.96 250 0.950,0.947,0.949,0.952,0.954,0.963 },
225 {65.87,59.06,15.87,7.570,5.567,3.65 251 {65.87,59.06,15.87,7.570,5.567,3.650,2.682,2.182,
226 1.939,1.579,1.325,1.178,1.108,1.01 252 1.939,1.579,1.325,1.178,1.108,1.014,0.965,0.947,
227 0.941,0.938,0.940,0.944,0.946,0.95 253 0.941,0.938,0.940,0.944,0.946,0.954 },
228 {55.60,47.34,15.92,7.810,5.755,3.76 254 {55.60,47.34,15.92,7.810,5.755,3.767,2.760,2.239,
229 1.985,1.609,1.343,1.188,1.113,1.01 255 1.985,1.609,1.343,1.188,1.113,1.013,0.960,0.939,
230 0.933,0.930,0.933,0.936,0.939,0.94 256 0.933,0.930,0.933,0.936,0.939,0.949 }};
231 << 257
232 static const G4double cpositron[15][22] = { 258 static const G4double cpositron[15][22] = {
233 {2.589,2.044,1.658,1.446,1.347,1.21 259 {2.589,2.044,1.658,1.446,1.347,1.217,1.144,1.110,
234 1.097,1.083,1.080,1.086,1.092,1.10 260 1.097,1.083,1.080,1.086,1.092,1.108,1.123,1.131,
235 1.131,1.126,1.117,1.108,1.103,1.10 261 1.131,1.126,1.117,1.108,1.103,1.100 },
236 {3.904,2.794,2.079,1.710,1.543,1.32 262 {3.904,2.794,2.079,1.710,1.543,1.325,1.202,1.145,
237 1.122,1.096,1.089,1.092,1.098,1.11 263 1.122,1.096,1.089,1.092,1.098,1.114,1.130,1.137,
238 1.138,1.132,1.122,1.113,1.108,1.10 264 1.138,1.132,1.122,1.113,1.108,1.102 },
239 {7.970,6.080,4.442,3.398,2.872,2.12 265 {7.970,6.080,4.442,3.398,2.872,2.127,1.672,1.451,
240 1.357,1.246,1.194,1.179,1.178,1.18 266 1.357,1.246,1.194,1.179,1.178,1.188,1.201,1.205,
241 1.203,1.190,1.173,1.159,1.151,1.14 267 1.203,1.190,1.173,1.159,1.151,1.145 },
242 {9.714,7.607,5.747,4.493,3.815,2.77 268 {9.714,7.607,5.747,4.493,3.815,2.777,2.079,1.715,
243 1.553,1.353,1.253,1.219,1.211,1.21 269 1.553,1.353,1.253,1.219,1.211,1.214,1.225,1.228,
244 1.225,1.210,1.191,1.175,1.166,1.17 270 1.225,1.210,1.191,1.175,1.166,1.174 },
245 {17.97,12.95,8.628,6.065,4.849,3.22 271 {17.97,12.95,8.628,6.065,4.849,3.222,2.275,1.820,
246 1.624,1.382,1.259,1.214,1.202,1.20 272 1.624,1.382,1.259,1.214,1.202,1.202,1.214,1.219,
247 1.217,1.203,1.184,1.169,1.160,1.15 273 1.217,1.203,1.184,1.169,1.160,1.151 },
248 {24.83,17.06,10.84,7.355,5.767,3.70 274 {24.83,17.06,10.84,7.355,5.767,3.707,2.546,1.996,
249 1.759,1.465,1.311,1.252,1.234,1.22 275 1.759,1.465,1.311,1.252,1.234,1.228,1.238,1.241,
250 1.237,1.222,1.201,1.184,1.174,1.15 276 1.237,1.222,1.201,1.184,1.174,1.159 },
251 {23.26,17.15,11.52,8.049,6.375,4.11 277 {23.26,17.15,11.52,8.049,6.375,4.114,2.792,2.155,
252 1.880,1.535,1.353,1.281,1.258,1.24 278 1.880,1.535,1.353,1.281,1.258,1.247,1.254,1.256,
253 1.252,1.234,1.212,1.194,1.183,1.17 279 1.252,1.234,1.212,1.194,1.183,1.170 },
254 {22.33,18.01,12.86,9.212,7.336,4.70 280 {22.33,18.01,12.86,9.212,7.336,4.702,3.117,2.348,
255 2.015,1.602,1.385,1.297,1.268,1.25 281 2.015,1.602,1.385,1.297,1.268,1.251,1.256,1.258,
256 1.254,1.237,1.214,1.195,1.185,1.17 282 1.254,1.237,1.214,1.195,1.185,1.179 },
257 {33.91,24.13,15.71,10.80,8.507,5.46 283 {33.91,24.13,15.71,10.80,8.507,5.467,3.692,2.808,
258 2.407,1.873,1.564,1.425,1.374,1.33 284 2.407,1.873,1.564,1.425,1.374,1.330,1.324,1.320,
259 1.312,1.288,1.258,1.235,1.221,1.20 285 1.312,1.288,1.258,1.235,1.221,1.205 },
260 {32.14,24.11,16.30,11.40,9.015,5.78 286 {32.14,24.11,16.30,11.40,9.015,5.782,3.868,2.917,
261 2.490,1.925,1.596,1.447,1.391,1.34 287 2.490,1.925,1.596,1.447,1.391,1.342,1.332,1.327,
262 1.320,1.294,1.264,1.240,1.226,1.21 288 1.320,1.294,1.264,1.240,1.226,1.214 },
263 {29.51,24.07,17.19,12.28,9.766,6.23 289 {29.51,24.07,17.19,12.28,9.766,6.238,4.112,3.066,
264 2.602,1.995,1.641,1.477,1.414,1.35 290 2.602,1.995,1.641,1.477,1.414,1.356,1.342,1.336,
265 1.328,1.302,1.270,1.245,1.231,1.23 291 1.328,1.302,1.270,1.245,1.231,1.233 },
266 {38.19,30.85,21.76,15.35,12.07,7.52 292 {38.19,30.85,21.76,15.35,12.07,7.521,4.812,3.498,
267 2.926,2.188,1.763,1.563,1.484,1.40 293 2.926,2.188,1.763,1.563,1.484,1.405,1.382,1.371,
268 1.361,1.330,1.294,1.267,1.251,1.23 294 1.361,1.330,1.294,1.267,1.251,1.239 },
269 {49.71,39.80,27.96,19.63,15.36,9.40 295 {49.71,39.80,27.96,19.63,15.36,9.407,5.863,4.155,
270 3.417,2.478,1.944,1.692,1.589,1.48 296 3.417,2.478,1.944,1.692,1.589,1.480,1.441,1.423,
271 1.409,1.372,1.330,1.298,1.280,1.25 297 1.409,1.372,1.330,1.298,1.280,1.258 },
272 {59.25,45.08,30.36,20.83,16.15,9.83 298 {59.25,45.08,30.36,20.83,16.15,9.834,6.166,4.407,
273 3.641,2.648,2.064,1.779,1.661,1.53 299 3.641,2.648,2.064,1.779,1.661,1.531,1.482,1.459,
274 1.442,1.400,1.354,1.319,1.299,1.27 300 1.442,1.400,1.354,1.319,1.299,1.272 },
275 {56.38,44.29,30.50,21.18,16.51,10.1 301 {56.38,44.29,30.50,21.18,16.51,10.11,6.354,4.542,
276 3.752,2.724,2.116,1.817,1.692,1.55 302 3.752,2.724,2.116,1.817,1.692,1.554,1.499,1.474,
277 1.456,1.412,1.364,1.328,1.307,1.28 303 1.456,1.412,1.364,1.328,1.307,1.282 }};
278 304
279 //data/corrections for T > Tlim 305 //data/corrections for T > Tlim
280 << 306
281 static const G4double hecorr[15] = { 307 static const G4double hecorr[15] = {
282 120.70, 117.50, 105.00, 92.92, 79.23, 74. 308 120.70, 117.50, 105.00, 92.92, 79.23, 74.510, 68.29,
283 57.39, 41.97, 36.14, 24.53, 10.21, -7.8 309 57.39, 41.97, 36.14, 24.53, 10.21, -7.855, -16.84,
284 -22.30}; 310 -22.30};
285 311
286 G4double sigma; 312 G4double sigma;
287 SetParticle(part); 313 SetParticle(part);
288 314
289 G4double Z23 = G4Pow::GetInstance()->Z23(G4l << 315 Z23 = G4Pow::GetInstance()->Z23(G4lrint(AtomicNumber));
290 316
291 // correction if particle .ne. e-/e+ 317 // correction if particle .ne. e-/e+
292 // compute equivalent kinetic energy 318 // compute equivalent kinetic energy
293 // lambda depends on p*beta .... 319 // lambda depends on p*beta ....
294 320
295 G4double eKineticEnergy = kinEnergy; << 321 G4double eKineticEnergy = KineticEnergy;
296 322
297 if(mass > CLHEP::electron_mass_c2) << 323 if(mass > electron_mass_c2)
298 { 324 {
299 G4double TAU = kinEnergy/mass ; << 325 G4double TAU = KineticEnergy/mass ;
300 G4double c = mass*TAU*(TAU+2.)/(CLHEP::el << 326 G4double c = mass*TAU*(TAU+2.)/(electron_mass_c2*(TAU+1.)) ;
301 G4double w = c-2.; << 327 G4double w = c-2. ;
302 G4double tau = 0.5*(w+std::sqrt(w*w+4.*c) << 328 G4double tau = 0.5*(w+sqrt(w*w+4.*c)) ;
303 eKineticEnergy = CLHEP::electron_mass_c2* << 329 eKineticEnergy = electron_mass_c2*tau ;
304 } 330 }
305 331
306 G4double eTotalEnergy = eKineticEnergy + CLH << 332 G4double eTotalEnergy = eKineticEnergy + electron_mass_c2 ;
307 G4double beta2 = eKineticEnergy*(eTotalEnerg << 333 G4double beta2 = eKineticEnergy*(eTotalEnergy+electron_mass_c2)
308 /(eTotalEnerg 334 /(eTotalEnergy*eTotalEnergy);
309 G4double bg2 = eKineticEnergy*(eTotalEnerg << 335 G4double bg2 = eKineticEnergy*(eTotalEnergy+electron_mass_c2)
310 /(CLHEP::elec << 336 /(electron_mass_c2*electron_mass_c2);
311 337
312 static const G4double epsfactor = 2.*CLHEP:: <<
313 CLHEP::electron_mass_c2*CLHEP::Bohr_radius <<
314 /(CLHEP::hbarc*CLHEP::hbarc); <<
315 G4double eps = epsfactor*bg2/Z23; 338 G4double eps = epsfactor*bg2/Z23;
316 339
317 if (eps<epsmin) sigma = 2.*eps*eps; 340 if (eps<epsmin) sigma = 2.*eps*eps;
318 else if(eps<epsmax) sigma = G4Log(1.+2.*eps 341 else if(eps<epsmax) sigma = G4Log(1.+2.*eps)-2.*eps/(1.+2.*eps);
319 else sigma = G4Log(2.*eps)-1 342 else sigma = G4Log(2.*eps)-1.+1./eps;
320 343
321 sigma *= chargeSquare*atomicNumber*atomicNum << 344 sigma *= ChargeSquare*AtomicNumber*AtomicNumber/(beta2*bg2);
322 345
323 // interpolate in AtomicNumber and beta2 346 // interpolate in AtomicNumber and beta2
324 G4double c1,c2,cc1; << 347 G4double c1,c2,cc1,cc2,corr;
325 348
326 // get bin number in Z 349 // get bin number in Z
327 G4int iZ = 14; 350 G4int iZ = 14;
328 // Loop checking, 03-Aug-2015, Vladimir Ivan << 351 while ((iZ>=0)&&(Zdat[iZ]>=AtomicNumber)) iZ -= 1;
329 while ((iZ>=0)&&(Zdat[iZ]>=atomicNumber)) { << 352 if (iZ==14) iZ = 13;
330 << 353 if (iZ==-1) iZ = 0 ;
331 iZ = std::min(std::max(iZ, 0), 13); <<
332 354
333 G4double ZZ1 = Zdat[iZ]; 355 G4double ZZ1 = Zdat[iZ];
334 G4double ZZ2 = Zdat[iZ+1]; 356 G4double ZZ2 = Zdat[iZ+1];
335 G4double ratZ = (atomicNumber-ZZ1)*(atomicNu << 357 G4double ratZ = (AtomicNumber-ZZ1)*(AtomicNumber+ZZ1)/
336 ((ZZ2-ZZ1)*(ZZ2+ZZ1)); 358 ((ZZ2-ZZ1)*(ZZ2+ZZ1));
337 359
338 static const G4double Tlim = 10.*CLHEP::MeV; <<
339 static const G4double sigmafactor = <<
340 CLHEP::twopi*CLHEP::classic_electr_radius* <<
341 static const G4double beta2lim = Tlim*(Tlim+ <<
342 ((Tlim+CLHEP::electron_mass_c2)*(Tlim+CLHE <<
343 static const G4double bg2lim = Tlim*(Tlim+ <<
344 (CLHEP::electron_mass_c2*CLHEP::electron_m <<
345 <<
346 static const G4double sig0[15] = { <<
347 0.2672*CLHEP::barn, 0.5922*CLHEP::barn, <<
348 11.69*CLHEP::barn , 13.24*CLHEP::barn , <<
349 35.13*CLHEP::barn , 39.95*CLHEP::barn , <<
350 91.15*CLHEP::barn , 104.4*CLHEP::barn , <<
351 <<
352 static const G4double Tdat[22] = { <<
353 100*CLHEP::eV, 200*CLHEP::eV, 400*CLHEP: <<
354 1*CLHEP::keV, 2*CLHEP::keV, 4*CLHEP::k <<
355 10*CLHEP::keV, 20*CLHEP::keV, 40*CLHEP:: <<
356 100*CLHEP::keV, 200*CLHEP::keV, 400*CLHEP: <<
357 1*CLHEP::MeV, 2*CLHEP::MeV, 4*CLHEP::M <<
358 10*CLHEP::MeV, 20*CLHEP::MeV}; <<
359 <<
360 if(eKineticEnergy <= Tlim) 360 if(eKineticEnergy <= Tlim)
361 { 361 {
362 // get bin number in T (beta2) 362 // get bin number in T (beta2)
363 G4int iT = 21; 363 G4int iT = 21;
364 // Loop checking, 03-Aug-2015, Vladimir Iv <<
365 while ((iT>=0)&&(Tdat[iT]>=eKineticEnergy) 364 while ((iT>=0)&&(Tdat[iT]>=eKineticEnergy)) iT -= 1;
366 << 365 if(iT==21) iT = 20;
367 iT = std::min(std::max(iT, 0), 20); << 366 if(iT==-1) iT = 0 ;
368 367
369 // calculate betasquare values 368 // calculate betasquare values
370 G4double T = Tdat[iT]; << 369 G4double T = Tdat[iT], E = T + electron_mass_c2;
371 G4double E = T + CLHEP::electron_mass_c2; << 370 G4double b2small = T*(E+electron_mass_c2)/(E*E);
372 G4double b2small = T*(E+CLHEP::electron_ma << 371
373 << 372 T = Tdat[iT+1]; E = T + electron_mass_c2;
374 T = Tdat[iT+1]; << 373 G4double b2big = T*(E+electron_mass_c2)/(E*E);
375 E = T + CLHEP::electron_mass_c2; <<
376 G4double b2big = T*(E+CLHEP::electron_mass <<
377 G4double ratb2 = (beta2-b2small)/(b2big-b2 374 G4double ratb2 = (beta2-b2small)/(b2big-b2small);
378 375
379 if (charge < 0.) 376 if (charge < 0.)
380 { 377 {
381 c1 = celectron[iZ][iT]; 378 c1 = celectron[iZ][iT];
382 c2 = celectron[iZ+1][iT]; 379 c2 = celectron[iZ+1][iT];
383 cc1 = c1+ratZ*(c2-c1); 380 cc1 = c1+ratZ*(c2-c1);
384 381
385 c1 = celectron[iZ][iT+1]; 382 c1 = celectron[iZ][iT+1];
386 c2 = celectron[iZ+1][iT+1]; 383 c2 = celectron[iZ+1][iT+1];
>> 384 cc2 = c1+ratZ*(c2-c1);
>> 385
>> 386 corr = cc1+ratb2*(cc2-cc1);
>> 387
>> 388 sigma *= sigmafactor/corr;
387 } 389 }
388 else 390 else
389 { 391 {
390 c1 = cpositron[iZ][iT]; 392 c1 = cpositron[iZ][iT];
391 c2 = cpositron[iZ+1][iT]; 393 c2 = cpositron[iZ+1][iT];
392 cc1 = c1+ratZ*(c2-c1); 394 cc1 = c1+ratZ*(c2-c1);
393 395
394 c1 = cpositron[iZ][iT+1]; 396 c1 = cpositron[iZ][iT+1];
395 c2 = cpositron[iZ+1][iT+1]; 397 c2 = cpositron[iZ+1][iT+1];
>> 398 cc2 = c1+ratZ*(c2-c1);
>> 399
>> 400 corr = cc1+ratb2*(cc2-cc1);
>> 401
>> 402 sigma *= sigmafactor/corr;
396 } 403 }
397 G4double cc2 = c1+ratZ*(c2-c1); <<
398 sigma *= sigmafactor/(cc1+ratb2*(cc2-cc1)) <<
399 } 404 }
400 else 405 else
401 { 406 {
402 c1 = bg2lim*sig0[iZ]*(1.+hecorr[iZ]*(beta2 407 c1 = bg2lim*sig0[iZ]*(1.+hecorr[iZ]*(beta2-beta2lim))/bg2;
403 c2 = bg2lim*sig0[iZ+1]*(1.+hecorr[iZ+1]*(b 408 c2 = bg2lim*sig0[iZ+1]*(1.+hecorr[iZ+1]*(beta2-beta2lim))/bg2;
404 if((atomicNumber >= ZZ1) && (atomicNumber << 409 if((AtomicNumber >= ZZ1) && (AtomicNumber <= ZZ2))
405 sigma = c1+ratZ*(c2-c1) ; 410 sigma = c1+ratZ*(c2-c1) ;
406 else if(atomicNumber < ZZ1) << 411 else if(AtomicNumber < ZZ1)
407 sigma = atomicNumber*atomicNumber*c1/(ZZ << 412 sigma = AtomicNumber*AtomicNumber*c1/(ZZ1*ZZ1);
408 else if(atomicNumber > ZZ2) << 413 else if(AtomicNumber > ZZ2)
409 sigma = atomicNumber*atomicNumber*c2/(ZZ << 414 sigma = AtomicNumber*AtomicNumber*c2/(ZZ2*ZZ2);
410 } 415 }
411 // low energy correction based on theory <<
412 sigma *= (1.+0.30/(1.+std::sqrt(1000.*eKinet <<
413 <<
414 return sigma; 416 return sigma;
>> 417
415 } 418 }
416 419
417 //....oooOO0OOooo........oooOO0OOooo........oo 420 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
418 421
419 void G4UrbanMscModel::StartTracking(G4Track* t 422 void G4UrbanMscModel::StartTracking(G4Track* track)
420 { 423 {
421 SetParticle(track->GetDynamicParticle()->Get 424 SetParticle(track->GetDynamicParticle()->GetDefinition());
422 firstStep = true; 425 firstStep = true;
>> 426 inside = false;
423 insideskin = false; 427 insideskin = false;
424 fr = facrange; << 428 tlimit = geombig;
425 tlimit = tgeom = rangeinit = geombig; << 429 stepmin = tlimitminfix ;
426 smallstep = 1.e10; << 430 tlimitmin = 10.*stepmin ;
427 stepmin = tlimitminfix; << 431 G4VEmModel::StartTracking(track);
428 tlimitmin = 10.*tlimitminfix; <<
429 rndmEngineMod = G4Random::getTheEngine(); <<
430 } 432 }
431 433
432 //....oooOO0OOooo........oooOO0OOooo........oo 434 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
433 435
434 G4double G4UrbanMscModel::ComputeTruePathLengt 436 G4double G4UrbanMscModel::ComputeTruePathLengthLimit(
435 const G4Track& tr 437 const G4Track& track,
436 G4double& current << 438 G4double& currentMinimalStep)
437 { 439 {
438 tPathLength = currentMinimalStep; 440 tPathLength = currentMinimalStep;
439 const G4DynamicParticle* dp = track.GetDynam 441 const G4DynamicParticle* dp = track.GetDynamicParticle();
440 442
441 G4StepPoint* sp = track.GetStep()->GetPreSte 443 G4StepPoint* sp = track.GetStep()->GetPreStepPoint();
442 G4StepStatus stepStatus = sp->GetStepStatus( 444 G4StepStatus stepStatus = sp->GetStepStatus();
443 couple = track.GetMaterialCutsCouple(); 445 couple = track.GetMaterialCutsCouple();
444 SetCurrentCouple(couple); 446 SetCurrentCouple(couple);
445 idx = couple->GetIndex(); << 447 currentMaterialIndex = couple->GetIndex();
446 currentKinEnergy = dp->GetKineticEnergy(); 448 currentKinEnergy = dp->GetKineticEnergy();
447 currentLogKinEnergy = dp->GetLogKineticEnerg << 449 currentRange = GetRange(particle,currentKinEnergy,couple);
448 currentRange = GetRange(particle,currentKinE << 450 lambda0 = GetTransportMeanFreePath(particle,currentKinEnergy);
449 lambda0 = GetTransportMeanFreePath(particle, << 451 tPathLength = min(tPathLength,currentRange);
450 << 452
451 tPathLength = std::min(tPathLength,currentRa << 453 // set flag to default values
452 /* << 454 latDisplasment = latDisplasmentbackup;
453 G4cout << "G4Urban::StepLimit tPathLength= " << 455 /*
454 << " range= " <<currentRange<< " lambda= "<< << 456 G4cout << "G4Urban::StepLimit tPathLength= "
455 <<G4endl; << 457 <<tPathLength<<" inside= " << inside
>> 458 << " range= " <<currentRange<< " lambda= "<<lambda0
>> 459 <<G4endl;
456 */ 460 */
457 // extreme small step << 461 // stop here if small range particle
458 if(tPathLength < tlimitminfix) { << 462 if(inside) {
459 latDisplasment = false; << 463 latDisplasment = false;
460 return ConvertTrueToGeom(tPathLength, curr << 464 return ConvertTrueToGeom(tPathLength, currentMinimalStep);
461 } 465 }
462 << 466 // stop here if small step
463 presafety = (stepStatus == fGeomBoundary) ? << 467 if(tPathLength < tlimitminfix) {
464 : ComputeSafety(sp->GetPosition( <<
465 <<
466 // stop here if small step or range is less <<
467 if((tPathLength == currentRange && tPathLeng <<
468 tPathLength < tlimitminfix) { <<
469 latDisplasment = false; 468 latDisplasment = false;
470 return ConvertTrueToGeom(tPathLength, curr 469 return ConvertTrueToGeom(tPathLength, currentMinimalStep);
471 } 470 }
472 << 471
473 // upper limit for the straight line distanc << 472 presafety = sp->GetSafety();
474 // for electrons and positrons <<
475 G4double distance = (mass < masslimite) <<
476 ? currentRange*msc[idx]->doverra <<
477 // for muons, hadrons <<
478 : currentRange*msc[idx]->doverrb; <<
479 <<
480 /* 473 /*
481 G4cout << "G4Urban::StepLimit tPathLength= " 474 G4cout << "G4Urban::StepLimit tPathLength= "
482 <<tPathLength<<" safety= " << pres << 475 <<tPathLength<<" safety= " << presafety
483 << " range= " <<currentRange<< " lam 476 << " range= " <<currentRange<< " lambda= "<<lambda0
484 << " Alg: " << steppingAlgorithm < << 477 << " Alg: " << steppingAlgorithm <<G4endl;
485 */ 478 */
486 // far from geometry boundary 479 // far from geometry boundary
487 if(distance < presafety) << 480 if(currentRange < presafety)
488 { 481 {
>> 482 inside = true;
489 latDisplasment = false; 483 latDisplasment = false;
490 return ConvertTrueToGeom(tPathLength, cu 484 return ConvertTrueToGeom(tPathLength, currentMinimalStep);
491 } 485 }
492 486
493 latDisplasment = latDisplasmentbackup; << 487 // standard version
494 // ----------------------------------------- << 488 //
495 // distance to boundary <<
496 if (steppingAlgorithm == fUseDistanceToBound 489 if (steppingAlgorithm == fUseDistanceToBoundary)
497 { 490 {
498 //compute geomlimit and presafety 491 //compute geomlimit and presafety
499 geomlimit = ComputeGeomLimit(track, pres 492 geomlimit = ComputeGeomLimit(track, presafety, currentRange);
500 /* << 493
501 G4cout << "G4Urban::Distance to bounda << 494 // is it far from boundary ?
502 <<geomlimit<<" safety= " << presaf << 495 if(currentRange < presafety)
503 */ << 496 {
>> 497 inside = true;
>> 498 latDisplasment = false;
>> 499 return ConvertTrueToGeom(tPathLength, currentMinimalStep);
>> 500 }
504 501
505 smallstep += 1.; 502 smallstep += 1.;
506 insideskin = false; 503 insideskin = false;
507 tgeom = geombig; <<
508 504
509 // initialisation at first step and at t <<
510 if(firstStep || (stepStatus == fGeomBoun 505 if(firstStep || (stepStatus == fGeomBoundary))
511 { 506 {
512 rangeinit = currentRange; 507 rangeinit = currentRange;
513 if(!firstStep) { smallstep = 1.; } << 508 if(firstStep) { smallstep = 1.e10; }
>> 509 else { smallstep = 1.; }
514 510
>> 511 //define stepmin here (it depends on lambda!)
>> 512 //rough estimation of lambda_elastic/lambda_transport
>> 513 G4double rat = currentKinEnergy/MeV ;
>> 514 rat = 1.e-3/(rat*(10.+rat)) ;
515 //stepmin ~ lambda_elastic 515 //stepmin ~ lambda_elastic
516 stepmin = ComputeStepmin(); << 516 stepmin = rat*lambda0;
517 skindepth = skin*stepmin; 517 skindepth = skin*stepmin;
518 tlimitmin = ComputeTlimitmin(); << 518 //define tlimitmin
519 /* << 519 tlimitmin = 10.*stepmin;
520 G4cout << "rangeinit= " << rangeinit << 520 tlimitmin = max(tlimitmin,tlimitminfix);
521 << " tlimitmin= " << tlimitmi << 521 //G4cout << "rangeinit= " << rangeinit << " stepmin= " << stepmin
522 << geomlimit <<G4endl; << 522 // << " tlimitmin= " << tlimitmin << " geomlimit= "
523 */ << 523 // << geomlimit <<G4endl;
524 } << 524 // constraint from the geometry
525 // constraint from the geometry << 525 if((geomlimit < geombig) && (geomlimit > geommin))
526 if((geomlimit < geombig) && (geomlimit > << 526 {
527 { << 527 // geomlimit is a geometrical step length
528 // geomlimit is a geometrical step l << 528 // transform it to true path length (estimation)
529 // transform it to true path length << 529 if((1.-geomlimit/lambda0) > 0.)
530 if(lambda0 > geomlimit) { << 530 geomlimit = -lambda0*G4Log(1.-geomlimit/lambda0)+tlimitmin ;
531 geomlimit = -lambda0*G4Log(1.-geom << 531
532 } << 532 if(stepStatus == fGeomBoundary)
533 tgeom = (stepStatus == fGeomBoundary << 533 tgeom = geomlimit/facgeom;
534 : facrange*rangeinit + stepmin; << 534 else
>> 535 tgeom = 2.*geomlimit/facgeom;
>> 536 }
>> 537 else
>> 538 tgeom = geombig;
535 } 539 }
536 540
537 //step limit 541 //step limit
538 tlimit = (currentRange > presafety) ? << 542 tlimit = facrange*rangeinit;
539 std::max(facrange*rangeinit, facsafety <<
540 543
541 //lower limit for tlimit 544 //lower limit for tlimit
542 tlimit = std::min(std::max(tlimit,tlimit << 545 tlimit = max(tlimit,tlimitmin);
543 /* << 546
544 G4cout << "tgeom= " << tgeom << " geomli << 547 tlimit = min(tlimit,tgeom);
545 << " tlimit= " << tlimit << " pres << 548
546 */ << 549 //G4cout << "tgeom= " << tgeom << " geomlimit= " << geomlimit
>> 550 // << " tlimit= " << tlimit << " presafety= " << presafety << G4endl;
>> 551
547 // shortcut 552 // shortcut
548 if((tPathLength < tlimit) && (tPathLengt 553 if((tPathLength < tlimit) && (tPathLength < presafety) &&
549 (smallstep > skin) && (tPathLength < 554 (smallstep > skin) && (tPathLength < geomlimit-0.999*skindepth))
550 { 555 {
551 return ConvertTrueToGeom(tPathLength, << 556 return ConvertTrueToGeom(tPathLength, currentMinimalStep);
552 } 557 }
553 558
554 // step reduction near to boundary 559 // step reduction near to boundary
555 if(smallstep <= skin) 560 if(smallstep <= skin)
556 { << 561 {
557 tlimit = stepmin; << 562 tlimit = stepmin;
558 insideskin = true; << 563 insideskin = true;
559 } << 564 }
560 else if(geomlimit < geombig) 565 else if(geomlimit < geombig)
561 { << 566 {
562 if(geomlimit > skindepth) << 567 if(geomlimit > skindepth)
563 { << 568 {
564 tlimit = std::min(tlimit, geomli << 569 tlimit = min(tlimit, geomlimit-0.999*skindepth);
565 } << 570 }
566 else << 571 else
567 { << 572 {
568 insideskin = true; << 573 insideskin = true;
569 tlimit = std::min(tlimit, stepmi << 574 tlimit = min(tlimit, stepmin);
570 } << 575 }
571 } << 576 }
>> 577
>> 578 tlimit = max(tlimit, stepmin);
>> 579
>> 580 // randomize 1st step or 1st 'normal' step in volume
>> 581 if(firstStep || ((smallstep == skin+1) && !insideskin))
>> 582 {
>> 583 G4double temptlimit = tlimit;
>> 584 if(temptlimit > tlimitmin)
>> 585 {
>> 586 do {
>> 587 temptlimit = G4RandGauss::shoot(rndmEngineMod,tlimit,0.3*tlimit);
>> 588 } while ((temptlimit < tlimitmin) ||
>> 589 (temptlimit > 2.*tlimit-tlimitmin));
>> 590 }
>> 591 else { temptlimit = tlimitmin; }
572 592
573 tlimit = std::max(tlimit, stepmin); << 593 tPathLength = min(tPathLength, temptlimit);
>> 594 }
>> 595 else
>> 596 {
>> 597 tPathLength = min(tPathLength, tlimit);
>> 598 }
574 599
575 // randomise if not 'small' step and ste <<
576 tPathLength = (tlimit < tPathLength && s <<
577 ? std::min(tPathLength, Randomizetlimi <<
578 : std::min(tPathLength, tlimit); <<
579 } 600 }
580 // ----------------------------------------- << 601 // for 'normal' simulation with or without magnetic field
581 // for simulation with or without magnetic f << 602 // there no small step/single scattering at boundaries
582 // there no small step/single scattering at <<
583 else if(steppingAlgorithm == fUseSafety) 603 else if(steppingAlgorithm == fUseSafety)
584 { 604 {
585 if(firstStep || (stepStatus == fGeomBoun << 605 if(currentRange < presafety)
>> 606 {
>> 607 inside = true;
>> 608 latDisplasment = false;
>> 609 return ConvertTrueToGeom(tPathLength, currentMinimalStep);
>> 610 }
>> 611 else if(stepStatus != fGeomBoundary) {
>> 612 presafety = ComputeSafety(sp->GetPosition(),tPathLength);
>> 613 }
>> 614 /*
>> 615 G4cout << "presafety= " << presafety
>> 616 << " firstStep= " << firstStep
>> 617 << " stepStatus= " << stepStatus
>> 618 << G4endl;
>> 619 */
>> 620 // is far from boundary
>> 621 if(currentRange < presafety)
>> 622 {
>> 623 inside = true;
>> 624 latDisplasment = false;
>> 625 return ConvertTrueToGeom(tPathLength, currentMinimalStep);
>> 626 }
>> 627
>> 628 if(firstStep || stepStatus == fGeomBoundary)
>> 629 {
586 rangeinit = currentRange; 630 rangeinit = currentRange;
587 fr = facrange; 631 fr = facrange;
588 // stepping for e+/e- only (not for mu << 632 // 9.1 like stepping for e+/e- only (not for muons,hadrons)
589 if(mass < masslimite) 633 if(mass < masslimite)
590 { << 634 {
591 rangeinit = std::max(rangeinit, la << 635 rangeinit = max(rangeinit, lambda0);
592 if(lambda0 > lambdalimit) { << 636 if(lambda0 > lambdalimit) {
593 fr *= (0.75+0.25*lambda0/lambdal << 637 fr *= (0.75+0.25*lambda0/lambdalimit);
594 } << 638 }
595 } << 639 }
>> 640
596 //lower limit for tlimit 641 //lower limit for tlimit
597 stepmin = ComputeStepmin(); << 642 G4double rat = currentKinEnergy/MeV;
598 tlimitmin = ComputeTlimitmin(); << 643 rat = 1.e-3/(rat*(10 + rat)) ;
>> 644 stepmin = lambda0*rat;
>> 645 tlimitmin = max(10*stepmin, tlimitminfix);
599 } 646 }
600 647
601 //step limit 648 //step limit
602 tlimit = (currentRange > presafety) ? << 649 tlimit = max(fr*rangeinit, facsafety*presafety);
603 std::max(fr*rangeinit, facsafety*presa <<
604 650
605 //lower limit for tlimit 651 //lower limit for tlimit
606 tlimit = std::max(tlimit, tlimitmin); << 652 tlimit = max(tlimit, tlimitmin);
607 << 653
608 // randomise if step determined by msc << 654 if(firstStep || stepStatus == fGeomBoundary)
609 tPathLength = (tlimit < tPathLength) ? << 655 {
610 std::min(tPathLength, Randomizetlimit( << 656 G4double temptlimit = tlimit;
>> 657 if(temptlimit > tlimitmin)
>> 658 {
>> 659 do {
>> 660 temptlimit = G4RandGauss::shoot(rndmEngineMod,tlimit,0.3*tlimit);
>> 661 } while ((temptlimit < tlimitmin) ||
>> 662 (temptlimit > 2.*tlimit-tlimitmin));
>> 663 }
>> 664 else { temptlimit = tlimitmin; }
>> 665
>> 666 tPathLength = min(tPathLength, temptlimit);
>> 667 }
>> 668 else { tPathLength = min(tPathLength, tlimit); }
611 } 669 }
612 // ----------------------------------------- << 670 // new stepping mode UseSafetyPlus
613 // for simulation with or without magnetic f << 671 else if(steppingAlgorithm == fUseSafetyPlus)
614 // there is small step/single scattering at <<
615 else if(steppingAlgorithm == fUseSafetyPlus) <<
616 { 672 {
617 if(firstStep || (stepStatus == fGeomBoun << 673 if(currentRange < presafety)
>> 674 {
>> 675 inside = true;
>> 676 latDisplasment = false;
>> 677 return ConvertTrueToGeom(tPathLength, currentMinimalStep);
>> 678 }
>> 679 else if(stepStatus != fGeomBoundary) {
>> 680 presafety = ComputeSafety(sp->GetPosition(),tPathLength);
>> 681 }
>> 682 /*
>> 683 G4cout << "presafety= " << presafety
>> 684 << " firstStep= " << firstStep
>> 685 << " stepStatus= " << stepStatus
>> 686 << G4endl;
>> 687 */
>> 688 // is far from boundary
>> 689 if(currentRange < presafety)
>> 690 {
>> 691 inside = true;
>> 692 latDisplasment = false;
>> 693 return ConvertTrueToGeom(tPathLength, currentMinimalStep);
>> 694 }
>> 695
>> 696 if(firstStep || stepStatus == fGeomBoundary)
>> 697 {
618 rangeinit = currentRange; 698 rangeinit = currentRange;
619 fr = facrange; 699 fr = facrange;
>> 700 rangecut = geombig;
620 if(mass < masslimite) 701 if(mass < masslimite)
621 { << 702 {
622 if(lambda0 > lambdalimit) { << 703 G4int index = 1;
623 fr *= (0.84+0.16*lambda0/lambdal << 704 if(charge > 0.) index = 2;
624 } << 705 rangecut = couple->GetProductionCuts()->GetProductionCut(index);
>> 706 if(lambda0 > lambdalimit) {
>> 707 fr *= (0.84+0.16*lambda0/lambdalimit);
625 } 708 }
>> 709 }
>> 710
626 //lower limit for tlimit 711 //lower limit for tlimit
627 stepmin = ComputeStepmin(); << 712 G4double rat = currentKinEnergy/MeV;
628 tlimitmin = ComputeTlimitmin(); << 713 rat = 1.e-3/(rat*(10 + rat)) ;
>> 714 stepmin = lambda0*rat;
>> 715 tlimitmin = max(10*stepmin, tlimitminfix);
629 } 716 }
630 //step limit 717 //step limit
631 tlimit = (currentRange > presafety) ? << 718 tlimit = max(fr*rangeinit, facsafety*presafety);
632 std::max(fr*rangeinit, facsafety*presafety) <<
633 719
634 //lower limit for tlimit 720 //lower limit for tlimit
635 tlimit = std::max(tlimit, tlimitmin); << 721 tlimit = max(tlimit, tlimitmin);
636 722
637 // condition for tPathLength from drr an 723 // condition for tPathLength from drr and finalr
638 if(currentRange > finalr) { 724 if(currentRange > finalr) {
639 G4double tmax = drr*currentRange+ 725 G4double tmax = drr*currentRange+
640 finalr*(1.-drr)*(2.-fi 726 finalr*(1.-drr)*(2.-finalr/currentRange);
641 tPathLength = std::min(tPathLength,tma << 727 tPathLength = min(tPathLength,tmax);
642 } 728 }
643 729
644 // randomise if step determined by msc << 730 // condition safety
645 tPathLength = (tlimit < tPathLength) ? << 731 if(currentRange > rangecut) {
646 std::min(tPathLength, Randomizetlimit( << 732 if(firstStep) {
>> 733 tPathLength = min(tPathLength,facsafety*presafety);
>> 734 }
>> 735 else if(stepStatus != fGeomBoundary) {
>> 736 if(presafety > stepmin) {
>> 737 tPathLength = min(tPathLength,presafety);
>> 738 }
>> 739 }
>> 740 }
>> 741
>> 742 if(firstStep || stepStatus == fGeomBoundary)
>> 743 {
>> 744 G4double temptlimit = tlimit;
>> 745 if(temptlimit > tlimitmin)
>> 746 {
>> 747 do {
>> 748 temptlimit = G4RandGauss::shoot(rndmEngineMod,tlimit,0.3*tlimit);
>> 749 } while ((temptlimit < tlimitmin) ||
>> 750 (temptlimit > 2.*tlimit-tlimitmin));
>> 751 }
>> 752 else { temptlimit = tlimitmin; }
>> 753
>> 754 tPathLength = min(tPathLength, temptlimit);
>> 755 }
>> 756 else { tPathLength = min(tPathLength, tlimit); }
647 } 757 }
648 758
649 // ----------------------------------------- << 759 // version similar to 7.1 (needed for some experiments)
650 // simple step limitation <<
651 else 760 else
652 { 761 {
653 if (stepStatus == fGeomBoundary) 762 if (stepStatus == fGeomBoundary)
>> 763 {
>> 764 if (currentRange > lambda0) { tlimit = facrange*currentRange; }
>> 765 else { tlimit = facrange*lambda0; }
>> 766
>> 767 tlimit = max(tlimit, tlimitmin);
>> 768 }
>> 769
>> 770 if(firstStep || stepStatus == fGeomBoundary)
>> 771 {
>> 772 G4double temptlimit = tlimit;
>> 773 if(temptlimit > tlimitmin)
654 { 774 {
655 tlimit = (currentRange > lambda0) << 775 do {
656 ? facrange*currentRange : facrange*lambd << 776 temptlimit = G4RandGauss::shoot(rndmEngineMod,tlimit,0.3*tlimit);
657 tlimit = std::max(tlimit, tlimitmin) << 777 } while ((temptlimit < tlimitmin) ||
>> 778 (temptlimit > 2.*tlimit-tlimitmin));
658 } 779 }
659 // randomise if step determined by msc << 780 else { temptlimit = tlimitmin; }
660 tPathLength = (tlimit < tPathLength) ? <<
661 std::min(tPathLength, Randomizetlimit( <<
662 } <<
663 781
664 // ----------------------------------------- << 782 tPathLength = min(tPathLength, temptlimit);
665 firstStep = false; << 783 }
>> 784 else { tPathLength = min(tPathLength, tlimit); }
>> 785 }
>> 786 //G4cout << "tPathLength= " << tPathLength
>> 787 // << " currentMinimalStep= " << currentMinimalStep << G4endl;
666 return ConvertTrueToGeom(tPathLength, curren 788 return ConvertTrueToGeom(tPathLength, currentMinimalStep);
667 } 789 }
668 790
669 //....oooOO0OOooo........oooOO0OOooo........oo 791 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
670 792
671 G4double G4UrbanMscModel::ComputeGeomPathLengt 793 G4double G4UrbanMscModel::ComputeGeomPathLength(G4double)
672 { 794 {
>> 795 firstStep = false;
673 lambdaeff = lambda0; 796 lambdaeff = lambda0;
674 par1 = -1. ; 797 par1 = -1. ;
675 par2 = par3 = 0. ; 798 par2 = par3 = 0. ;
676 799
677 // this correction needed to run MSC with eI 800 // this correction needed to run MSC with eIoni and eBrem inactivated
678 // and makes no harm for a normal run 801 // and makes no harm for a normal run
679 tPathLength = std::min(tPathLength,currentRa << 802 tPathLength = min(tPathLength,currentRange);
680 803
681 // do the true -> geom transformation 804 // do the true -> geom transformation
682 zPathLength = tPathLength; 805 zPathLength = tPathLength;
683 806
684 // z = t for very small tPathLength 807 // z = t for very small tPathLength
685 if(tPathLength < tlimitminfix2) return zPath 808 if(tPathLength < tlimitminfix2) return zPathLength;
686 809
>> 810 // VI: it is already checked
>> 811 // if(tPathLength > currentRange)
>> 812 // tPathLength = currentRange ;
687 /* 813 /*
688 G4cout << "ComputeGeomPathLength: tpl= " << 814 G4cout << "ComputeGeomPathLength: tpl= " << tPathLength
689 << " R= " << currentRange << " L0= " << 815 << " R= " << currentRange << " L0= " << lambda0
690 << " E= " << currentKinEnergy << " " << 816 << " E= " << currentKinEnergy << " "
691 << particle->GetParticleName() << G4e << 817 << particle->GetParticleName() << G4endl;
692 */ 818 */
693 G4double tau = tPathLength/lambda0 ; 819 G4double tau = tPathLength/lambda0 ;
694 820
695 if ((tau <= tausmall) || insideskin) { 821 if ((tau <= tausmall) || insideskin) {
696 zPathLength = std::min(tPathLength, lambda << 822 zPathLength = min(tPathLength, lambda0);
697 823
698 } else if (tPathLength < currentRange*dtrl) << 824 } else if (tPathLength < currentRange*dtrl) {
699 zPathLength = (tau < taulim) ? tPathLength << 825 if(tau < taulim) zPathLength = tPathLength*(1.-0.5*tau) ;
700 : lambda0*(1.-G4Exp(-tau)); << 826 else zPathLength = lambda0*(1.-G4Exp(-tau));
701 827
702 } else if(currentKinEnergy < mass || tPathLe 828 } else if(currentKinEnergy < mass || tPathLength == currentRange) {
703 par1 = 1./currentRange; << 829 par1 = 1./currentRange ;
704 par2 = currentRange/lambda0; << 830 par2 = 1./(par1*lambda0) ;
705 par3 = 1.+par2; << 831 par3 = 1.+par2 ;
706 if(tPathLength < currentRange) { 832 if(tPathLength < currentRange) {
707 zPathLength = 833 zPathLength =
708 (1.-G4Exp(par3*G4Log(1.-tPathLength/cu << 834 (1.-G4Exp(par3*G4Log(1.-tPathLength/currentRange)))/(par1*par3);
709 } else { 835 } else {
710 zPathLength = 1./(par1*par3); 836 zPathLength = 1./(par1*par3);
711 } 837 }
712 838
713 } else { 839 } else {
714 G4double rfin = std::max(currentRange-tPat << 840 G4double rfin = max(currentRange-tPathLength, 0.01*currentRange);
715 G4double T1 = GetEnergy(particle,rfin,coup 841 G4double T1 = GetEnergy(particle,rfin,couple);
716 G4double lambda1 = GetTransportMeanFreePat 842 G4double lambda1 = GetTransportMeanFreePath(particle,T1);
717 843
718 par1 = (lambda0-lambda1)/(lambda0*tPathLen 844 par1 = (lambda0-lambda1)/(lambda0*tPathLength);
719 //G4cout << "par1= " << par1 << " L1= " << 845 //G4cout << "par1= " << par1 << " L1= " << lambda1 << G4endl;
720 par2 = 1./(par1*lambda0); 846 par2 = 1./(par1*lambda0);
721 par3 = 1.+par2; << 847 par3 = 1.+par2 ;
722 zPathLength = (1.-G4Exp(par3*G4Log(lambda1 848 zPathLength = (1.-G4Exp(par3*G4Log(lambda1/lambda0)))/(par1*par3);
723 } 849 }
724 850
725 zPathLength = std::min(zPathLength, lambda0) << 851 zPathLength = min(zPathLength, lambda0);
726 //G4cout<< "zPathLength= "<< zPathLength<< " 852 //G4cout<< "zPathLength= "<< zPathLength<< " L0= " << lambda0 << G4endl;
727 return zPathLength; 853 return zPathLength;
728 } 854 }
729 855
730 //....oooOO0OOooo........oooOO0OOooo........oo 856 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
731 857
732 G4double G4UrbanMscModel::ComputeTrueStepLengt 858 G4double G4UrbanMscModel::ComputeTrueStepLength(G4double geomStepLength)
733 { 859 {
734 // step defined other than transportation 860 // step defined other than transportation
735 if(geomStepLength == zPathLength) { 861 if(geomStepLength == zPathLength) {
736 //G4cout << "Urban::ComputeTrueLength: tPa 862 //G4cout << "Urban::ComputeTrueLength: tPathLength= " << tPathLength
737 // << " step= " << geomStepLengt << 863 // << " step= " << geomStepLength << " *** " << G4endl;
738 return tPathLength; 864 return tPathLength;
739 } 865 }
740 866
741 zPathLength = geomStepLength; 867 zPathLength = geomStepLength;
742 868
743 // t = z for very small step 869 // t = z for very small step
744 if(geomStepLength < tlimitminfix2) { 870 if(geomStepLength < tlimitminfix2) {
745 tPathLength = geomStepLength; 871 tPathLength = geomStepLength;
746 872
747 // recalculation 873 // recalculation
748 } else { 874 } else {
749 875
750 G4double tlength = geomStepLength; 876 G4double tlength = geomStepLength;
751 if((geomStepLength > lambda0*tausmall) && 877 if((geomStepLength > lambda0*tausmall) && !insideskin) {
752 878
753 if(par1 < 0.) { 879 if(par1 < 0.) {
754 tlength = -lambda0*G4Log(1.-geomStepLe << 880 tlength = -lambda0*G4Log(1.-geomStepLength/lambda0) ;
755 } else { 881 } else {
756 const G4double par4 = par1*par3; << 882 if(par1*par3*geomStepLength < 1.) {
757 if(par4*geomStepLength < 1.) { << 883 tlength = (1.-G4Exp(G4Log(1.-par1*par3*geomStepLength)/par3))/par1 ;
758 tlength = (1.-G4Exp(G4Log(1.-par4*ge << 884 } else {
759 } else { << 885 tlength = currentRange;
760 tlength = currentRange; << 886 }
761 } <<
762 } 887 }
763 888
764 if(tlength < geomStepLength) { tlength 889 if(tlength < geomStepLength) { tlength = geomStepLength; }
765 else if(tlength > tPathLength) { tlength 890 else if(tlength > tPathLength) { tlength = tPathLength; }
766 } 891 }
767 tPathLength = tlength; 892 tPathLength = tlength;
768 } 893 }
769 //G4cout << "Urban::ComputeTrueLength: tPath 894 //G4cout << "Urban::ComputeTrueLength: tPathLength= " << tPathLength
770 // << " step= " << geomStepLength << << 895 // << " step= " << geomStepLength << " &&& " << G4endl;
771 896
772 return tPathLength; 897 return tPathLength;
773 } 898 }
774 899
775 //....oooOO0OOooo........oooOO0OOooo........oo 900 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
776 901
777 G4ThreeVector& 902 G4ThreeVector&
778 G4UrbanMscModel::SampleScattering(const G4Thre 903 G4UrbanMscModel::SampleScattering(const G4ThreeVector& oldDirection,
779 G4double /*s << 904 G4double /*safety*/)
780 { 905 {
781 fDisplacement.set(0.0,0.0,0.0); 906 fDisplacement.set(0.0,0.0,0.0);
782 if(tPathLength >= currentRange) { return fDi << 907 G4double kineticEnergy = currentKinEnergy;
783 <<
784 G4double kinEnergy = currentKinEnergy; <<
785 if (tPathLength > currentRange*dtrl) { 908 if (tPathLength > currentRange*dtrl) {
786 kinEnergy = GetEnergy(particle,currentRang << 909 kineticEnergy = GetEnergy(particle,currentRange-tPathLength,couple);
787 } else if(tPathLength > currentRange*0.01) { << 910 } else {
788 kinEnergy -= tPathLength*GetDEDX(particle, << 911 kineticEnergy -= tPathLength*GetDEDX(particle,currentKinEnergy,couple);
789 currentLo <<
790 } 912 }
791 913
792 if((tPathLength <= tlimitminfix) || (tPathLe << 914 if((kineticEnergy <= eV) || (tPathLength <= tlimitminfix) ||
793 (kinEnergy <= CLHEP::eV)) { return fDispl << 915 (tPathLength < tausmall*lambda0)) { return fDisplacement; }
794 916
795 G4double cth = SampleCosineTheta(tPathLength << 917 G4double cth = SampleCosineTheta(tPathLength,kineticEnergy);
796 918
797 // protection against 'bad' cth values 919 // protection against 'bad' cth values
798 if(std::abs(cth) >= 1.0) { return fDisplacem << 920 if(std::fabs(cth) >= 1.0) { return fDisplacement; }
799 921
800 G4double sth = std::sqrt((1.0 - cth)*(1.0 + << 922 /*
801 G4double phi = CLHEP::twopi*rndmEngineMod->f << 923 if(cth < 1.0 - 1000*tPathLength/lambda0 && cth < 0.5 &&
802 G4ThreeVector newDirection(sth*std::cos(phi) << 924 kineticEnergy > 20*MeV) {
803 newDirection.rotateUz(oldDirection); << 925 G4cout << "### G4UrbanMscModel::SampleScattering for "
>> 926 << particle->GetParticleName()
>> 927 << " E(MeV)= " << kineticEnergy/MeV
>> 928 << " Step(mm)= " << tPathLength/mm
>> 929 << " in " << CurrentCouple()->GetMaterial()->GetName()
>> 930 << " CosTheta= " << cth << G4endl;
>> 931 }
>> 932 */
>> 933 G4double sth = sqrt((1.0 - cth)*(1.0 + cth));
>> 934 G4double phi = twopi*rndmEngineMod->flat();
>> 935 G4double dirx = sth*cos(phi);
>> 936 G4double diry = sth*sin(phi);
804 937
>> 938 G4ThreeVector newDirection(dirx,diry,cth);
>> 939 newDirection.rotateUz(oldDirection);
805 fParticleChange->ProposeMomentumDirection(ne 940 fParticleChange->ProposeMomentumDirection(newDirection);
806 /* 941 /*
807 G4cout << "G4UrbanMscModel::SampleSecondarie 942 G4cout << "G4UrbanMscModel::SampleSecondaries: e(MeV)= " << kineticEnergy
808 << " sinTheta= " << sth << " safety(m << 943 << " sinTheta= " << sth << " safety(mm)= " << safety
809 << " trueStep(mm)= " << tPathLength << 944 << " trueStep(mm)= " << tPathLength
810 << " geomStep(mm)= " << zPathLength << 945 << " geomStep(mm)= " << zPathLength
811 << G4endl; << 946 << G4endl;
812 */ 947 */
813 948
>> 949 //if (latDisplasment && safety > tlimitminfix2 && currentTau >= tausmall &&
>> 950 // !insideskin) {
814 if (latDisplasment && currentTau >= tausmall 951 if (latDisplasment && currentTau >= tausmall) {
815 if(dispAlg96) { SampleDisplacement(sth, ph << 952 //sample displacement r
816 else { SampleDisplacementNew(cth, << 953 G4double rmax = sqrt((tPathLength-zPathLength)*(tPathLength+zPathLength));
817 fDisplacement.rotateUz(oldDirection); << 954 G4double r = rmax*G4Exp(G4Log(rndmEngineMod->flat())*third);
>> 955
>> 956 /*
>> 957 G4cout << "G4UrbanMscModel::SampleSecondaries: e(MeV)= " << kineticEnergy
>> 958 << " sinTheta= " << sth << " r(mm)= " << r
>> 959 << " trueStep(mm)= " << tPathLength
>> 960 << " geomStep(mm)= " << zPathLength
>> 961 << G4endl;
>> 962 */
>> 963 if(r > 0.)
>> 964 {
>> 965 G4double latcorr = LatCorrelation();
>> 966 latcorr = min(latcorr, r);
>> 967
>> 968 // sample direction of lateral displacement
>> 969 // compute it from the lateral correlation
>> 970 G4double Phi = 0.;
>> 971 if(std::abs(r*sth) < latcorr)
>> 972 Phi = twopi*rndmEngineMod->flat();
>> 973 else
>> 974 {
>> 975 //G4cout << "latcorr= " << latcorr << " r*sth= " << r*sth
>> 976 // << " ratio= " << latcorr/(r*sth) << G4endl;
>> 977 G4double psi = std::acos(latcorr/(r*sth));
>> 978 if(rndmEngineMod->flat() < 0.5)
>> 979 Phi = phi+psi;
>> 980 else
>> 981 Phi = phi-psi;
>> 982 }
>> 983
>> 984 dirx = std::cos(Phi);
>> 985 diry = std::sin(Phi);
>> 986
>> 987 fDisplacement.set(r*dirx,r*diry,0.0);
>> 988 fDisplacement.rotateUz(oldDirection);
>> 989 }
818 } 990 }
819 return fDisplacement; 991 return fDisplacement;
820 } 992 }
821 993
822 //....oooOO0OOooo........oooOO0OOooo........oo 994 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
823 995
824 G4double G4UrbanMscModel::SampleCosineTheta(G4 996 G4double G4UrbanMscModel::SampleCosineTheta(G4double trueStepLength,
825 G4 << 997 G4double KineticEnergy)
826 { 998 {
827 G4double cth = 1.0; << 999 G4double cth = 1. ;
828 G4double tau = trueStepLength/lambda0; 1000 G4double tau = trueStepLength/lambda0;
>> 1001 currentTau = tau;
>> 1002 lambdaeff = lambda0;
829 1003
830 // mean tau value << 1004 Zeff = couple->GetMaterial()->GetTotNbOfElectPerVolume()/
831 if(currentKinEnergy != kinEnergy) { << 1005 couple->GetMaterial()->GetTotNbOfAtomsPerVolume() ;
832 G4double lambda1 = GetTransportMeanFreePat << 1006
833 if(std::abs(lambda1 - lambda0) > lambda0*0 << 1007 if(Zold != Zeff)
834 tau = trueStepLength*G4Log(lambda0/lambd << 1008 UpdateCache();
835 } << 1009
>> 1010 G4double lambda1 = GetTransportMeanFreePath(particle,KineticEnergy);
>> 1011 if(std::fabs(lambda1 - lambda0) > lambda0*0.01 && lambda1 > 0.)
>> 1012 {
>> 1013 // mean tau value
>> 1014 tau = trueStepLength*G4Log(lambda0/lambda1)/(lambda0-lambda1);
836 } 1015 }
837 1016
838 currentTau = tau; << 1017 currentTau = tau ;
839 lambdaeff = trueStepLength/currentTau; 1018 lambdaeff = trueStepLength/currentTau;
840 currentRadLength = couple->GetMaterial()->Ge 1019 currentRadLength = couple->GetMaterial()->GetRadlen();
841 1020
842 if (tau >= taubig) { cth = -1.+2.*rndmEngine 1021 if (tau >= taubig) { cth = -1.+2.*rndmEngineMod->flat(); }
843 else if (tau >= tausmall) { 1022 else if (tau >= tausmall) {
844 static const G4double numlim = 0.01; 1023 static const G4double numlim = 0.01;
845 static const G4double onethird = 1./3.; << 1024 G4double xmeanth, x2meanth;
846 if(tau < numlim) { 1025 if(tau < numlim) {
847 xmeanth = 1.0 - tau*(1.0 - 0.5*tau); 1026 xmeanth = 1.0 - tau*(1.0 - 0.5*tau);
848 x2meanth= 1.0 - tau*(5.0 - 6.25*tau)*one << 1027 x2meanth= 1.0 - tau*(5.0 - 6.25*tau)/3.;
849 } else { 1028 } else {
850 xmeanth = G4Exp(-tau); 1029 xmeanth = G4Exp(-tau);
851 x2meanth = (1.+2.*G4Exp(-2.5*tau))*oneth << 1030 x2meanth = (1.+2.*G4Exp(-2.5*tau))/3.;
852 } 1031 }
853 1032
854 // too large step of low-energy particle 1033 // too large step of low-energy particle
855 G4double relloss = 1. - kinEnergy/currentK << 1034 G4double relloss = 1. - KineticEnergy/currentKinEnergy;
856 static const G4double rellossmax= 0.50; <<
857 if(relloss > rellossmax) { 1035 if(relloss > rellossmax) {
858 return SimpleScattering(); << 1036 return SimpleScattering(xmeanth,x2meanth);
859 } 1037 }
860 // is step extreme small ? 1038 // is step extreme small ?
861 G4bool extremesmallstep = false; << 1039 G4bool extremesmallstep = false ;
862 G4double tsmall = std::min(tlimitmin,lambd << 1040 G4double tsmall = tlimitmin;
863 << 1041 G4double theta0 = 0.;
864 G4double theta0; <<
865 if(trueStepLength > tsmall) { 1042 if(trueStepLength > tsmall) {
866 theta0 = ComputeTheta0(trueStepLength,ki << 1043 theta0 = ComputeTheta0(trueStepLength,KineticEnergy);
867 } else { 1044 } else {
868 theta0 = std::sqrt(trueStepLength/tsmall << 1045 G4double rate = trueStepLength/tsmall ;
869 *ComputeTheta0(tsmall,kinEnergy); << 1046 if(rndmEngineMod->flat() < rate) {
870 extremesmallstep = true; << 1047 theta0 = ComputeTheta0(tsmall,KineticEnergy);
>> 1048 extremesmallstep = true ;
>> 1049 }
871 } 1050 }
872 << 1051 //G4cout << "Theta0= " << theta0 << " theta0max= " << theta0max
873 static const G4double onesixth = 1./6.; << 1052 // << " sqrt(tausmall)= " << sqrt(tausmall) << G4endl;
874 static const G4double one12th = 1./12.; <<
875 static const G4double theta0max = CLHEP::p <<
876 1053
877 // protection for very small angles 1054 // protection for very small angles
878 G4double theta2 = theta0*theta0; 1055 G4double theta2 = theta0*theta0;
879 1056
880 if(theta2 < tausmall) { return cth; } 1057 if(theta2 < tausmall) { return cth; }
881 if(theta0 > theta0max) { return SimpleScat << 1058
>> 1059 if(theta0 > theta0max) {
>> 1060 return SimpleScattering(xmeanth,x2meanth);
>> 1061 }
882 1062
883 G4double x = theta2*(1.0 - theta2*one12th) << 1063 G4double x = theta2*(1.0 - theta2/12.);
884 if(theta2 > numlim) { 1064 if(theta2 > numlim) {
885 G4double sth = 2*std::sin(0.5*theta0); << 1065 G4double sth = 2*sin(0.5*theta0);
886 x = sth*sth; 1066 x = sth*sth;
887 } 1067 }
888 1068
889 // parameter for tail 1069 // parameter for tail
890 G4double ltau = G4Log(tau); << 1070 G4double ltau= G4Log(tau);
891 G4double u = !extremesmallstep ? G4Exp(lta << 1071 G4double u = G4Exp(ltau/6.);
892 : G4Exp(G4Log(tsmall/lambda0)*onesixth); << 1072 if(extremesmallstep) u = G4Exp(G4Log(tsmall/lambda0)/6.);
893 <<
894 G4double xx = G4Log(lambdaeff/currentRadL 1073 G4double xx = G4Log(lambdaeff/currentRadLength);
895 G4double xsi = msc[idx]->coeffc1 + << 1074 G4double xsi = coeffc1+u*(coeffc2+coeffc3*u)+coeffc4*xx;
896 u*(msc[idx]->coeffc2+msc[idx]->coeffc3*u <<
897 1075
898 // tail should not be too big 1076 // tail should not be too big
899 xsi = std::max(xsi, 1.9); << 1077 if(xsi < 1.9) {
900 /* 1078 /*
901 if(KineticEnergy > 20*MeV && xsi < 1.6) 1079 if(KineticEnergy > 20*MeV && xsi < 1.6) {
902 G4cout << "G4UrbanMscModel::SampleCosi << 1080 G4cout << "G4UrbanMscModel::SampleCosineTheta: E(GeV)= "
903 << KineticEnergy/GeV << 1081 << KineticEnergy/GeV
904 << " !!** c= " << xsi << 1082 << " !!** c= " << xsi
905 << " **!! length(mm)= " << true << 1083 << " **!! length(mm)= " << trueStepLength << " Zeff= " << Zeff
906 << " " << couple->GetMaterial() << 1084 << " " << couple->GetMaterial()->GetName()
907 << " tau= " << tau << G4endl; << 1085 << " tau= " << tau << G4endl;
908 } 1086 }
909 */ 1087 */
>> 1088 xsi = 1.9;
>> 1089 }
910 1090
911 G4double c = xsi; 1091 G4double c = xsi;
912 1092
913 if(std::abs(c-3.) < 0.001) { c = 3.00 << 1093 if(fabs(c-3.) < 0.001) { c = 3.001; }
914 else if(std::abs(c-2.) < 0.001) { c = 2.00 << 1094 else if(fabs(c-2.) < 0.001) { c = 2.001; }
915 1095
916 G4double c1 = c-1.; 1096 G4double c1 = c-1.;
>> 1097
917 G4double ea = G4Exp(-xsi); 1098 G4double ea = G4Exp(-xsi);
918 G4double eaa = 1.-ea ; 1099 G4double eaa = 1.-ea ;
919 G4double xmean1 = 1.-(1.-(1.+xsi)*ea)*x/ea 1100 G4double xmean1 = 1.-(1.-(1.+xsi)*ea)*x/eaa;
920 G4double x0 = 1. - xsi*x; 1101 G4double x0 = 1. - xsi*x;
921 1102
922 // G4cout << " xmean1= " << xmean1 << " x 1103 // G4cout << " xmean1= " << xmean1 << " xmeanth= " << xmeanth << G4endl;
923 1104
924 if(xmean1 <= 0.999*xmeanth) { return Simpl << 1105 if(xmean1 <= 0.999*xmeanth) {
925 << 1106 return SimpleScattering(xmeanth,x2meanth);
>> 1107 }
926 //from continuity of derivatives 1108 //from continuity of derivatives
927 G4double b = 1.+(c-xsi)*x; 1109 G4double b = 1.+(c-xsi)*x;
928 1110
929 G4double b1 = b+1.; 1111 G4double b1 = b+1.;
930 G4double bx = c*x; 1112 G4double bx = c*x;
931 1113
932 G4double eb1 = G4Exp(G4Log(b1)*c1); 1114 G4double eb1 = G4Exp(G4Log(b1)*c1);
933 G4double ebx = G4Exp(G4Log(bx)*c1); 1115 G4double ebx = G4Exp(G4Log(bx)*c1);
934 G4double d = ebx/eb1; 1116 G4double d = ebx/eb1;
935 1117
936 G4double xmean2 = (x0 + d - (bx - b1*d)/(c 1118 G4double xmean2 = (x0 + d - (bx - b1*d)/(c-2.))/(1. - d);
937 1119
938 G4double f1x0 = ea/eaa; 1120 G4double f1x0 = ea/eaa;
939 G4double f2x0 = c1/(c*(1. - d)); 1121 G4double f2x0 = c1/(c*(1. - d));
940 G4double prob = f2x0/(f1x0+f2x0); 1122 G4double prob = f2x0/(f1x0+f2x0);
941 1123
942 G4double qprob = xmeanth/(prob*xmean1+(1.- 1124 G4double qprob = xmeanth/(prob*xmean1+(1.-prob)*xmean2);
943 1125
944 // sampling of costheta 1126 // sampling of costheta
945 //G4cout << "c= " << c << " qprob= " << qp 1127 //G4cout << "c= " << c << " qprob= " << qprob << " eb1= " << eb1
946 // << " c1= " << c1 << " b1= " << b1 << " 1128 // << " c1= " << c1 << " b1= " << b1 << " bx= " << bx << " eb1= " << eb1
947 // << G4endl; << 1129 // << G4endl;
948 rndmEngineMod->flatArray(2, rndmarray); << 1130 if(rndmEngineMod->flat() < qprob)
949 if(rndmarray[0] < qprob) <<
950 { 1131 {
951 G4double var = 0; 1132 G4double var = 0;
952 if(rndmarray[1] < prob) { << 1133 if(rndmEngineMod->flat() < prob) {
953 cth = 1.+G4Log(ea+rndmEngineMod->flat( 1134 cth = 1.+G4Log(ea+rndmEngineMod->flat()*eaa)*x;
954 } else { 1135 } else {
955 var = (1.0 - d)*rndmEngineMod->flat(); 1136 var = (1.0 - d)*rndmEngineMod->flat();
956 if(var < numlim*d) { 1137 if(var < numlim*d) {
957 var /= (d*c1); 1138 var /= (d*c1);
958 cth = -1.0 + var*(1.0 - 0.5*var*c)*( 1139 cth = -1.0 + var*(1.0 - 0.5*var*c)*(2. + (c - xsi)*x);
959 } else { 1140 } else {
960 cth = 1. + x*(c - xsi - c*G4Exp(-G4L 1141 cth = 1. + x*(c - xsi - c*G4Exp(-G4Log(var + d)/c1));
961 } 1142 }
962 } 1143 }
963 } else { << 1144 /*
964 cth = -1.+2.*rndmarray[1]; << 1145 if(KineticEnergy > 5*GeV && cth < 0.9) {
965 } << 1146 G4cout << "G4UrbanMscModel::SampleCosineTheta: E(GeV)= "
966 } << 1147 << KineticEnergy/GeV
967 return cth; << 1148 << " 1-cosT= " << 1 - cth
968 } << 1149 << " length(mm)= " << trueStepLength << " Zeff= " << Zeff
969 << 1150 << " tau= " << tau
970 //....oooOO0OOooo........oooOO0OOooo........oo << 1151 << " prob= " << prob << " var= " << var << G4endl;
971 << 1152 G4cout << " c= " << c << " qprob= " << qprob << " eb1= " << eb1
972 G4double G4UrbanMscModel::ComputeTheta0(G4doub << 1153 << " ebx= " << ebx
973 G4doub << 1154 << " c1= " << c1 << " b= " << b << " b1= " << b1
974 { << 1155 << " bx= " << bx << " d= " << d
975 // for all particles take the width of the c << 1156 << " ea= " << ea << " eaa= " << eaa << G4endl;
976 // from a parametrization similar to the H << 1157 }
977 // ( Highland formula: Particle Physics Book << 1158 */
978 G4double invbetacp = (kinEnergy+mass)/(kinEn <<
979 if(currentKinEnergy != kinEnergy) { <<
980 invbetacp = std::sqrt(invbetacp*(currentKi <<
981 (currentKinEnergy*(currentKinEnergy+2. <<
982 } <<
983 G4double y = trueStepLength/currentRadLength <<
984 <<
985 if(fPosiCorrection && particle == positron) <<
986 { <<
987 static const G4double xl= 0.6; <<
988 static const G4double xh= 0.9; <<
989 static const G4double e = 113.0; <<
990 G4double corr; <<
991 <<
992 G4double tau = std::sqrt(currentKinEnergy* <<
993 G4double x = std::sqrt(tau*(tau+2.)/((tau+ <<
994 G4double a = msc[idx]->posa; <<
995 G4double b = msc[idx]->posb; <<
996 G4double c = msc[idx]->posc; <<
997 G4double d = msc[idx]->posd; <<
998 if(x < xl) { <<
999 corr = a*(1.-G4Exp(-b*x)); <<
1000 } else if(x > xh) { <<
1001 corr = c+d*G4Exp(e*(x-1.)); <<
1002 } else { <<
1003 G4double yl = a*(1.-G4Exp(-b*xl)); <<
1004 G4double yh = c+d*G4Exp(e*(xh-1.)); <<
1005 G4double y0 = (yh-yl)/(xh-xl); <<
1006 G4double y1 = yl-y0*xl; <<
1007 corr = y0*x+y1; <<
1008 } <<
1009 //======================================= <<
1010 y *= corr*msc[idx]->pose; <<
1011 } <<
1012 <<
1013 static const G4double c_highland = 13.6*CLH <<
1014 G4double theta0 = c_highland*std::abs(charg <<
1015 <<
1016 // correction factor from e- scattering dat <<
1017 theta0 *= (msc[idx]->coeffth1+msc[idx]->coe <<
1018 return theta0; <<
1019 } <<
1020 <<
1021 //....oooOO0OOooo........oooOO0OOooo........o <<
1022 <<
1023 void G4UrbanMscModel::SampleDisplacement(G4do <<
1024 { <<
1025 // simple and fast sampling <<
1026 // based on single scattering results <<
1027 // u = r/rmax : mean value <<
1028 <<
1029 G4double rmax = std::sqrt((tPathLength-zPat <<
1030 if(rmax > 0.) <<
1031 { <<
1032 G4double r = 0.73*rmax; <<
1033 <<
1034 // simple distribution for v=Phi-phi=psi <<
1035 // beta determined from the requirement t <<
1036 // the same mean value than that obtained <<
1037 <<
1038 static const G4double cbeta = 2.160; <<
1039 static const G4double cbeta1 = 1. - G4Exp <<
1040 rndmEngineMod->flatArray(2, rndmarray); <<
1041 G4double psi = -G4Log(1. - rndmarray[0]*c <<
1042 G4double Phi = (rndmarray[1] < 0.5) ? phi <<
1043 fDisplacement.set(r*std::cos(Phi),r*std:: <<
1044 } <<
1045 } <<
1046 <<
1047 //....oooOO0OOooo........oooOO0OOooo........o <<
1048 <<
1049 void G4UrbanMscModel::SampleDisplacementNew(G <<
1050 { <<
1051 // simple and fast sampling <<
1052 // based on single scattering results <<
1053 // u = (r/rmax)**2 : distribution from ss s <<
1054 const G4double eps = 1.e-3; <<
1055 const G4double rmax = <<
1056 std::sqrt((tPathLength-zPathLength)*(tPat <<
1057 <<
1058 if(rmax > 0.) <<
1059 { <<
1060 const G4double x0 = 0.73 ; <<
1061 const G4double alpha = G4Log(7.33)/x0 ; <<
1062 const G4double a1 = 1.-x0 ; <<
1063 const G4double a2 = 1.-G4Exp(-alpha*x0) ; <<
1064 const G4double a3 = G4Exp(alpha*x0)-1. ; <<
1065 const G4double w1 = 2.*a2/(alpha*a1+2.*a2 <<
1066 <<
1067 G4double r, sqx; <<
1068 if (rmax/currentRange < eps) <<
1069 { <<
1070 r = 0.73*rmax ; <<
1071 sqx = 1.; <<
1072 } 1159 }
1073 else << 1160 else {
1074 { << 1161 cth = -1.+2.*rndmEngineMod->flat();
1075 rndmEngineMod->flatArray(2,rndmarray); << 1162 /*
1076 const G4double x = (rndmarray[0] < w1) << 1163 if(KineticEnergy > 5*GeV) {
1077 1. - a1*std::sqrt(1.-rndmarray[1]); << 1164 G4cout << "G4UrbanMscModel::SampleCosineTheta: E(GeV)= "
1078 << 1165 << KineticEnergy/GeV
1079 sqx = std::sqrt(x); << 1166 << " length(mm)= " << trueStepLength << " Zeff= " << Zeff
1080 r = sqx*rmax; << 1167 << " qprob= " << qprob << G4endl;
>> 1168 }
>> 1169 */
1081 } 1170 }
1082 // Gaussian distribution for Phi-phi=psi <<
1083 const G4double sigma = 0.1+0.9*sqx; <<
1084 const G4double psi = G4RandGauss::shoot(0 <<
1085 const G4double Phi = phi+psi; <<
1086 fDisplacement.set(r*std::cos(Phi), r*std: <<
1087 } 1171 }
>> 1172 return cth ;
1088 } 1173 }
1089 1174
1090 //....oooOO0OOooo........oooOO0OOooo........o 1175 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
1091 1176
1092 void G4UrbanMscModel::InitialiseModelCache() <<
1093 { <<
1094 // it is assumed, that for the second run o <<
1095 // of a new G4MaterialCutsCouple is possibl <<
1096 auto theCoupleTable = G4ProductionCutsTable <<
1097 std::size_t numOfCouples = theCoupleTable-> <<
1098 if(numOfCouples != msc.size()) { msc.resize <<
1099 <<
1100 for(G4int j=0; j<(G4int)numOfCouples; ++j) <<
1101 auto aCouple = theCoupleTable->GetMateria <<
1102 1177
1103 // new couple <<
1104 msc[j] = new mscData(); <<
1105 G4double Zeff = aCouple->GetMaterial()->G <<
1106 G4double sqrz = std::sqrt(Zeff); <<
1107 msc[j]->sqrtZ = sqrz; <<
1108 // parameterisation of step limitation <<
1109 msc[j]->factmin = dispAlg96 ? 0.001 : 0.0 <<
1110 G4double lnZ = G4Log(Zeff); <<
1111 // correction in theta0 formula <<
1112 G4double w = G4Exp(lnZ/6.); <<
1113 G4double facz = 0.990395+w*(-0.168386+w*0 <<
1114 msc[j]->coeffth1 = facz*(1. - 8.7780e-2/Z <<
1115 msc[j]->coeffth2 = facz*(4.0780e-2 + 1.73 <<
1116 <<
1117 // tail parameters <<
1118 G4double Z13 = w*w; <<
1119 msc[j]->coeffc1 = 2.3785 - Z13*(4.1981 <<
1120 msc[j]->coeffc2 = 4.7526e-1 + Z13*(1.7694 <<
1121 msc[j]->coeffc3 = 2.3683e-1 - Z13*(1.8111 <<
1122 msc[j]->coeffc4 = 1.7888e-2 + Z13*(1.9659 <<
1123 <<
1124 msc[j]->Z23 = Z13*Z13; <<
1125 <<
1126 msc[j]->stepmina = 27.725/(1.+0.203*Zeff) <<
1127 msc[j]->stepminb = 6.152/(1.+0.111*Zeff) <<
1128 <<
1129 // 21.07.2020 <<
1130 msc[j]->doverra = 9.6280e-1 - 8.4848e-2*m <<
1131 <<
1132 // 06.10.2020 <<
1133 // msc[j]->doverra = 7.7024e-1 - 6.7878e- <<
1134 msc[j]->doverrb = 1.15 - 9.76e-4*Zeff; <<
1135 <<
1136 // corrections for e+ <<
1137 msc[j]->posa = 0.994-4.08e-3*Zeff; <<
1138 msc[j]->posb = 7.16+(52.6+365./Zeff)/Zeff <<
1139 msc[j]->posc = 1.000-4.47e-3*Zeff; <<
1140 msc[j]->posd = 1.21e-3*Zeff; <<
1141 msc[j]->pose = 1.+Zeff*(1.84035e-4*Zeff-1 <<
1142 } <<
1143 } <<
1144 1178
1145 //....oooOO0OOooo........oooOO0OOooo........o <<
1146 1179