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27 // ------------------------------------------- 27 // -------------------------------------------------------------------
28 // 28 //
29 // GEANT4 Class file 29 // GEANT4 Class file
30 // 30 //
31 // 31 //
32 // File name: G4EmSaturation 32 // File name: G4EmSaturation
33 // 33 //
34 // Author: Vladimir Ivanchenko 34 // Author: Vladimir Ivanchenko
35 // 35 //
36 // Creation date: 18.02.2008 36 // Creation date: 18.02.2008
37 // 37 //
38 // Modifications: 38 // Modifications:
39 // 39 //
40 // ------------------------------------------- 40 // -------------------------------------------------------------
41 41
42 //....oooOO0OOooo........oooOO0OOooo........oo 42 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
43 //....oooOO0OOooo........oooOO0OOooo........oo 43 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
44 44
45 #include "G4EmSaturation.hh" 45 #include "G4EmSaturation.hh"
46 #include "G4PhysicalConstants.hh" 46 #include "G4PhysicalConstants.hh"
47 #include "G4SystemOfUnits.hh" 47 #include "G4SystemOfUnits.hh"
48 #include "G4LossTableManager.hh" 48 #include "G4LossTableManager.hh"
49 #include "G4NistManager.hh" 49 #include "G4NistManager.hh"
50 #include "G4Material.hh" 50 #include "G4Material.hh"
51 #include "G4MaterialCutsCouple.hh" 51 #include "G4MaterialCutsCouple.hh"
52 #include "G4ParticleTable.hh" 52 #include "G4ParticleTable.hh"
53 53
54 //....oooOO0OOooo........oooOO0OOooo........oo 54 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
55 55
56 std::size_t G4EmSaturation::nMaterials = 0; << 56 G4int G4EmSaturation::nMaterials = 0;
57 std::vector<G4double> G4EmSaturation::massFact 57 std::vector<G4double> G4EmSaturation::massFactors;
58 std::vector<G4double> G4EmSaturation::effCharg 58 std::vector<G4double> G4EmSaturation::effCharges;
59 std::vector<G4double> G4EmSaturation::g4MatDat 59 std::vector<G4double> G4EmSaturation::g4MatData;
60 std::vector<G4String> G4EmSaturation::g4MatNam 60 std::vector<G4String> G4EmSaturation::g4MatNames;
61 61
62 G4EmSaturation::G4EmSaturation(G4int verb) 62 G4EmSaturation::G4EmSaturation(G4int verb)
63 { 63 {
64 verbose = verb; 64 verbose = verb;
>> 65
65 nWarnings = nG4Birks = 0; 66 nWarnings = nG4Birks = 0;
66 67
67 electron = nullptr; 68 electron = nullptr;
68 proton = nullptr; 69 proton = nullptr;
69 nist = G4NistManager::Instance(); 70 nist = G4NistManager::Instance();
70 InitialiseG4Saturation(); <<
71 } 71 }
72 72
73 //....oooOO0OOooo........oooOO0OOooo........oo 73 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
74 74
75 G4EmSaturation::~G4EmSaturation() = default; << 75 G4EmSaturation::~G4EmSaturation()
>> 76 {}
76 77
77 //....oooOO0OOooo........oooOO0OOooo........oo 78 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
78 79
79 G4double G4EmSaturation::VisibleEnergyDepositi 80 G4double G4EmSaturation::VisibleEnergyDeposition(
80 const G4 81 const G4ParticleDefinition* p,
81 const G4 82 const G4MaterialCutsCouple* couple,
82 G4double 83 G4double length,
83 G4double 84 G4double edep,
84 G4double 85 G4double niel) const
85 { 86 {
86 // no energy deposition 87 // no energy deposition
87 if(edep <= 0.0) { return 0.0; } 88 if(edep <= 0.0) { return 0.0; }
88 89
89 // zero step length may happens only if step 90 // zero step length may happens only if step limiter process
90 // is applied, in that case saturation shoul 91 // is applied, in that case saturation should not be applied
91 if(length <= 0.0) { return edep; } 92 if(length <= 0.0) { return edep; }
92 93
93 G4double evis = edep; 94 G4double evis = edep;
94 G4double bfactor = couple->GetMaterial()->Ge 95 G4double bfactor = couple->GetMaterial()->GetIonisation()->GetBirksConstant();
95 96
96 if(bfactor > 0.0) { 97 if(bfactor > 0.0) {
97 98
98 // atomic relaxations for gamma incident 99 // atomic relaxations for gamma incident
99 if(22 == p->GetPDGEncoding()) { 100 if(22 == p->GetPDGEncoding()) {
100 //G4cout << "%% gamma edep= " << edep/ke << 101 //G4cout << "%% gamma edep= " << edep/keV << " keV " <<manager << G4endl;
101 evis /= (1.0 + bfactor*edep/ 102 evis /= (1.0 + bfactor*edep/
102 G4LossTableManager::Instance()->GetRan 103 G4LossTableManager::Instance()->GetRange(electron,edep,couple));
103 104
104 // energy loss 105 // energy loss
105 } else { 106 } else {
106 107
107 // protections 108 // protections
108 G4double nloss = std::max(niel, 0.0); 109 G4double nloss = std::max(niel, 0.0);
109 G4double eloss = edep - nloss; 110 G4double eloss = edep - nloss;
110 111
111 // neutrons and neutral hadrons 112 // neutrons and neutral hadrons
112 if(0.0 == p->GetPDGCharge() || eloss < 0 113 if(0.0 == p->GetPDGCharge() || eloss < 0.0) {
113 nloss = edep; 114 nloss = edep;
114 eloss = 0.0; 115 eloss = 0.0;
115 } else { 116 } else {
116 117
117 // continues energy loss 118 // continues energy loss
118 eloss /= (1.0 + bfactor*eloss/length); 119 eloss /= (1.0 + bfactor*eloss/length);
119 } 120 }
120 // non-ionizing energy loss 121 // non-ionizing energy loss
121 if(nloss > 0.0) { 122 if(nloss > 0.0) {
122 std::size_t idx = couple->GetMaterial( << 123 G4int idx = couple->GetMaterial()->GetIndex();
123 G4double escaled = nloss*massFactors[i 124 G4double escaled = nloss*massFactors[idx];
124 /* << 125 /*
125 G4cout << "%% p edep= " << nloss/keV < 126 G4cout << "%% p edep= " << nloss/keV << " keV Escaled= "
126 << escaled << " MeV in " << co 127 << escaled << " MeV in " << couple->GetMaterial()->GetName()
127 << " " << p->GetParticleName() << 128 << " " << p->GetParticleName()
128 << G4endl; << 129 << G4endl;
129 G4cout << proton->GetParticleName() << G4end << 130 */
130 */ <<
131 G4double range = G4LossTableManager::I 131 G4double range = G4LossTableManager::Instance()
132 ->GetRange(proton,escaled,couple)/ef 132 ->GetRange(proton,escaled,couple)/effCharges[idx];
133 nloss /= (1.0 + bfactor*nloss/range); 133 nloss /= (1.0 + bfactor*nloss/range);
134 } 134 }
135 evis = eloss + nloss; 135 evis = eloss + nloss;
136 } 136 }
137 } 137 }
138 return evis; 138 return evis;
139 } 139 }
140 140
141 //....oooOO0OOooo........oooOO0OOooo........oo 141 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
142 142
143 void G4EmSaturation::InitialiseG4Saturation() 143 void G4EmSaturation::InitialiseG4Saturation()
144 { 144 {
145 if(nMaterials == G4Material::GetNumberOfMate <<
146 nMaterials = G4Material::GetNumberOfMaterial 145 nMaterials = G4Material::GetNumberOfMaterials();
147 massFactors.resize(nMaterials, 1.0); 146 massFactors.resize(nMaterials, 1.0);
148 effCharges.resize(nMaterials, 1.0); 147 effCharges.resize(nMaterials, 1.0);
149 148
150 if(0 == nG4Birks) { InitialiseG4materials() 149 if(0 == nG4Birks) { InitialiseG4materials(); }
151 150
152 for(std::size_t i=0; i<nMaterials; ++i) { << 151 for(G4int i=0; i<nMaterials; ++i) {
153 InitialiseBirksCoefficient((*G4Material::G 152 InitialiseBirksCoefficient((*G4Material::GetMaterialTable())[i]);
154 } 153 }
155 if(verbose > 0) { DumpBirksCoefficients(); } 154 if(verbose > 0) { DumpBirksCoefficients(); }
156 } 155 }
157 156
158 //....oooOO0OOooo........oooOO0OOooo........oo 157 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
159 158
160 G4double G4EmSaturation::FindG4BirksCoefficien 159 G4double G4EmSaturation::FindG4BirksCoefficient(const G4Material* mat)
161 { 160 {
162 if(0 == nG4Birks) { InitialiseG4materials() 161 if(0 == nG4Birks) { InitialiseG4materials(); }
163 162
164 G4String name = mat->GetName(); 163 G4String name = mat->GetName();
165 // is this material in the vector? 164 // is this material in the vector?
166 165
167 for(G4int j=0; j<nG4Birks; ++j) { 166 for(G4int j=0; j<nG4Birks; ++j) {
168 if(name == g4MatNames[j]) { 167 if(name == g4MatNames[j]) {
169 if(verbose > 0) 168 if(verbose > 0)
170 G4cout << "### G4EmSaturation::FindG4B 169 G4cout << "### G4EmSaturation::FindG4BirksCoefficient for "
171 << name << " is " << g4MatData[ 170 << name << " is " << g4MatData[j]*MeV/mm << " mm/MeV "
172 << G4endl; 171 << G4endl;
173 return g4MatData[j]; 172 return g4MatData[j];
174 } 173 }
175 } 174 }
176 return 0.0; 175 return 0.0;
177 } 176 }
178 177
179 //....oooOO0OOooo........oooOO0OOooo........oo 178 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
180 179
181 void G4EmSaturation::InitialiseBirksCoefficien 180 void G4EmSaturation::InitialiseBirksCoefficient(const G4Material* mat)
182 { 181 {
183 // electron and proton should exist in any c 182 // electron and proton should exist in any case
184 if(nullptr == electron) { << 183 if(!electron) {
185 electron = G4ParticleTable::GetParticleTab 184 electron = G4ParticleTable::GetParticleTable()->FindParticle("e-");
186 proton = G4ParticleTable::GetParticleTable 185 proton = G4ParticleTable::GetParticleTable()->FindParticle("proton");
187 if(nullptr == electron) { << 186 if(!electron || !proton) {
188 G4Exception("G4EmSaturation::InitialiseB 187 G4Exception("G4EmSaturation::InitialiseBirksCoefficient", "em0001",
189 FatalException, "electron should exist") << 188 FatalException, "both electron and proton should exist");
190 } 189 }
191 } 190 }
192 191
193 G4double curBirks = mat->GetIonisation()->Ge 192 G4double curBirks = mat->GetIonisation()->GetBirksConstant();
194 193
195 G4String name = mat->GetName(); 194 G4String name = mat->GetName();
196 195
197 // material has no Birks coeffitient defined 196 // material has no Birks coeffitient defined
198 // seach in the Geant4 list 197 // seach in the Geant4 list
199 if(curBirks == 0.0) { 198 if(curBirks == 0.0) {
200 for(G4int j=0; j<nG4Birks; ++j) { 199 for(G4int j=0; j<nG4Birks; ++j) {
201 if(name == g4MatNames[j]) { 200 if(name == g4MatNames[j]) {
202 mat->GetIonisation()->SetBirksConstant 201 mat->GetIonisation()->SetBirksConstant(g4MatData[j]);
203 curBirks = g4MatData[j]; 202 curBirks = g4MatData[j];
204 break; 203 break;
205 } 204 }
206 } 205 }
207 } 206 }
208 207
209 if(curBirks == 0.0) { return; } 208 if(curBirks == 0.0) { return; }
210 209
211 // compute mean mass ratio 210 // compute mean mass ratio
212 G4double curRatio = 0.0; 211 G4double curRatio = 0.0;
213 G4double curChargeSq = 0.0; 212 G4double curChargeSq = 0.0;
214 G4double norm = 0.0; 213 G4double norm = 0.0;
215 const G4ElementVector* theElementVector = ma 214 const G4ElementVector* theElementVector = mat->GetElementVector();
216 const G4double* theAtomNumDensityVector = ma 215 const G4double* theAtomNumDensityVector = mat->GetVecNbOfAtomsPerVolume();
217 std::size_t nelm = mat->GetNumberOfElements( << 216 size_t nelm = mat->GetNumberOfElements();
218 for (std::size_t i=0; i<nelm; ++i) { << 217 for (size_t i=0; i<nelm; ++i) {
219 const G4Element* elm = (*theElementVector) 218 const G4Element* elm = (*theElementVector)[i];
220 G4int Z = elm->GetZasInt(); << 219 G4double Z = elm->GetZ();
221 G4double w = theAtomNumDensityVector[i]; << 220 G4double w = Z*Z*theAtomNumDensityVector[i];
222 curRatio += w/nist->GetAtomicMassAmu(Z); << 221 curRatio += w/nist->GetAtomicMassAmu(G4int(Z));
223 curChargeSq += (Z*Z)*w; << 222 curChargeSq = Z*Z*w;
224 norm += w; 223 norm += w;
225 } 224 }
226 if ( norm > 0.0) { norm = 1.0/norm; } << 225 curRatio *= proton_mass_c2/norm;
227 curRatio *= (CLHEP::proton_mass_c2*norm); << 226 curChargeSq /= norm;
228 curChargeSq *= norm; <<
229 227
230 // store results 228 // store results
231 std::size_t idx = mat->GetIndex(); << 229 G4int idx = mat->GetIndex();
232 massFactors[idx] = curRatio; 230 massFactors[idx] = curRatio;
233 effCharges[idx] = curChargeSq; 231 effCharges[idx] = curChargeSq;
234 } 232 }
235 233
236 //....oooOO0OOooo........oooOO0OOooo........oo 234 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
237 235
238 void G4EmSaturation::DumpBirksCoefficients() 236 void G4EmSaturation::DumpBirksCoefficients()
239 { 237 {
240 G4cout << "### Birks coefficients used in ru 238 G4cout << "### Birks coefficients used in run time" << G4endl;
241 const G4MaterialTable* mtable = G4Material:: 239 const G4MaterialTable* mtable = G4Material::GetMaterialTable();
242 for(std::size_t i=0; i<nMaterials; ++i) { << 240 for(G4int i=0; i<nMaterials; ++i) {
243 const G4Material* mat = (*mtable)[i]; 241 const G4Material* mat = (*mtable)[i];
244 G4double br = mat->GetIonisation()->GetBir 242 G4double br = mat->GetIonisation()->GetBirksConstant();
245 if(br > 0.0) { 243 if(br > 0.0) {
246 G4cout << " " << mat->GetName() << " 244 G4cout << " " << mat->GetName() << " "
247 << br*MeV/mm << " mm/MeV" << " " 245 << br*MeV/mm << " mm/MeV" << " "
248 << br*mat->GetDensity()*MeV*cm2/g 246 << br*mat->GetDensity()*MeV*cm2/g
249 << " g/cm^2/MeV massFactor= " << mass 247 << " g/cm^2/MeV massFactor= " << massFactors[i]
250 << " effCharge= " << effCharges[i] << G 248 << " effCharge= " << effCharges[i] << G4endl;
251 } 249 }
252 } 250 }
253 } 251 }
254 252
255 //....oooOO0OOooo........oooOO0OOooo........oo 253 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
256 254
257 void G4EmSaturation::DumpG4BirksCoefficients() 255 void G4EmSaturation::DumpG4BirksCoefficients()
258 { 256 {
259 if(nG4Birks > 0) { 257 if(nG4Birks > 0) {
260 G4cout << "### Birks coefficients for Gean 258 G4cout << "### Birks coefficients for Geant4 materials" << G4endl;
261 for(G4int i=0; i<nG4Birks; ++i) { 259 for(G4int i=0; i<nG4Birks; ++i) {
262 G4cout << " " << g4MatNames[i] << " 260 G4cout << " " << g4MatNames[i] << " "
263 << g4MatData[i]*MeV/mm << " mm/Me 261 << g4MatData[i]*MeV/mm << " mm/MeV" << G4endl;
264 } 262 }
265 } 263 }
266 } 264 }
267 265
268 //....oooOO0OOooo........oooOO0OOooo........oo 266 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
269 267
270 void G4EmSaturation::InitialiseG4materials() 268 void G4EmSaturation::InitialiseG4materials()
271 { 269 {
272 nG4Birks = 4; 270 nG4Birks = 4;
273 g4MatData.reserve(nG4Birks); 271 g4MatData.reserve(nG4Birks);
274 272
275 // M.Hirschberg et al., IEEE Trans. Nuc. Sci 273 // M.Hirschberg et al., IEEE Trans. Nuc. Sci. 39 (1992) 511
276 // SCSN-38 kB = 0.00842 g/cm^2/MeV; rho = 1. 274 // SCSN-38 kB = 0.00842 g/cm^2/MeV; rho = 1.06 g/cm^3
277 g4MatNames.push_back("G4_POLYSTYRENE"); 275 g4MatNames.push_back("G4_POLYSTYRENE");
278 g4MatData.push_back(0.07943*mm/MeV); 276 g4MatData.push_back(0.07943*mm/MeV);
279 277
280 // C.Fabjan (private communication) 278 // C.Fabjan (private communication)
281 // kB = 0.006 g/cm^2/MeV; rho = 7.13 g/cm^3 279 // kB = 0.006 g/cm^2/MeV; rho = 7.13 g/cm^3
282 g4MatNames.push_back("G4_BGO"); 280 g4MatNames.push_back("G4_BGO");
283 g4MatData.push_back(0.008415*mm/MeV); 281 g4MatData.push_back(0.008415*mm/MeV);
284 282
285 // A.Ribon analysis of publications 283 // A.Ribon analysis of publications
286 // Scallettar et al., Phys. Rev. A25 (1982) 284 // Scallettar et al., Phys. Rev. A25 (1982) 2419.
287 // NIM A 523 (2004) 275. 285 // NIM A 523 (2004) 275.
288 // kB = 0.022 g/cm^2/MeV; rho = 1.396 g/cm^3 286 // kB = 0.022 g/cm^2/MeV; rho = 1.396 g/cm^3;
289 // ATLAS Efield = 10 kV/cm provide the stron 287 // ATLAS Efield = 10 kV/cm provide the strongest effect
290 // kB = 0.1576*mm/MeV 288 // kB = 0.1576*mm/MeV
291 // A. Kiryunin and P.Strizenec "Geant4 hadro 289 // A. Kiryunin and P.Strizenec "Geant4 hadronic
292 // working group meeting " kB = 0.041/9.13 g 290 // working group meeting " kB = 0.041/9.13 g/cm^2/MeV
293 g4MatNames.push_back("G4_lAr"); 291 g4MatNames.push_back("G4_lAr");
294 g4MatData.push_back(0.032*mm/MeV); 292 g4MatData.push_back(0.032*mm/MeV);
295 293
296 //G4_BARIUM_FLUORIDE 294 //G4_BARIUM_FLUORIDE
297 //G4_CESIUM_IODIDE 295 //G4_CESIUM_IODIDE
298 //G4_GEL_PHOTO_EMULSION 296 //G4_GEL_PHOTO_EMULSION
299 //G4_PHOTO_EMULSION 297 //G4_PHOTO_EMULSION
300 //G4_PLASTIC_SC_VINYLTOLUENE 298 //G4_PLASTIC_SC_VINYLTOLUENE
301 //G4_SODIUM_IODIDE 299 //G4_SODIUM_IODIDE
302 //G4_STILBENE 300 //G4_STILBENE
303 //G4_lAr 301 //G4_lAr
304 302
305 //G4_PbWO4 - CMS value 303 //G4_PbWO4 - CMS value
306 g4MatNames.push_back("G4_PbWO4"); 304 g4MatNames.push_back("G4_PbWO4");
307 g4MatData.push_back(0.0333333*mm/MeV); 305 g4MatData.push_back(0.0333333*mm/MeV);
308 306
309 //G4_Lucite 307 //G4_Lucite
310 308
311 } 309 }
312 310
313 //....oooOO0OOooo........oooOO0OOooo........oo 311 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
314 312