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>> 26 // $Id: G4EmSaturation.cc 81936 2014-06-06 15:42:55Z gcosmo $
26 // 27 //
27 // ------------------------------------------- 28 // -------------------------------------------------------------------
28 // 29 //
29 // GEANT4 Class file 30 // GEANT4 Class file
30 // 31 //
31 // 32 //
32 // File name: G4EmSaturation 33 // File name: G4EmSaturation
33 // 34 //
34 // Author: Vladimir Ivanchenko 35 // Author: Vladimir Ivanchenko
35 // 36 //
36 // Creation date: 18.02.2008 37 // Creation date: 18.02.2008
37 // 38 //
38 // Modifications: 39 // Modifications:
39 // 40 //
40 // ------------------------------------------- 41 // -------------------------------------------------------------
41 42
42 //....oooOO0OOooo........oooOO0OOooo........oo 43 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
43 //....oooOO0OOooo........oooOO0OOooo........oo 44 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
44 45
45 #include "G4EmSaturation.hh" 46 #include "G4EmSaturation.hh"
46 #include "G4PhysicalConstants.hh" 47 #include "G4PhysicalConstants.hh"
47 #include "G4SystemOfUnits.hh" 48 #include "G4SystemOfUnits.hh"
48 #include "G4LossTableManager.hh" 49 #include "G4LossTableManager.hh"
49 #include "G4NistManager.hh" 50 #include "G4NistManager.hh"
50 #include "G4Material.hh" 51 #include "G4Material.hh"
51 #include "G4MaterialCutsCouple.hh" 52 #include "G4MaterialCutsCouple.hh"
52 #include "G4ParticleTable.hh" 53 #include "G4ParticleTable.hh"
53 54
54 //....oooOO0OOooo........oooOO0OOooo........oo 55 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
55 56
56 std::size_t G4EmSaturation::nMaterials = 0; <<
57 std::vector<G4double> G4EmSaturation::massFact <<
58 std::vector<G4double> G4EmSaturation::effCharg <<
59 std::vector<G4double> G4EmSaturation::g4MatDat <<
60 std::vector<G4String> G4EmSaturation::g4MatNam <<
61 <<
62 G4EmSaturation::G4EmSaturation(G4int verb) 57 G4EmSaturation::G4EmSaturation(G4int verb)
>> 58 : manager(0)
63 { 59 {
64 verbose = verb; 60 verbose = verb;
65 nWarnings = nG4Birks = 0; << 61 manager = 0;
>> 62
>> 63 curMaterial = 0;
>> 64 curBirks = 0.0;
>> 65 curRatio = 1.0;
>> 66 curChargeSq = 1.0;
>> 67 nMaterials = nWarnings = 0;
66 68
67 electron = nullptr; << 69 electron = 0;
68 proton = nullptr; << 70 proton = 0;
69 nist = G4NistManager::Instance(); 71 nist = G4NistManager::Instance();
70 InitialiseG4Saturation(); << 72
>> 73 InitialiseG4materials();
71 } 74 }
72 75
73 //....oooOO0OOooo........oooOO0OOooo........oo 76 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
74 77
75 G4EmSaturation::~G4EmSaturation() = default; << 78 G4EmSaturation::~G4EmSaturation()
>> 79 {}
76 80
77 //....oooOO0OOooo........oooOO0OOooo........oo 81 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
78 82
79 G4double G4EmSaturation::VisibleEnergyDepositi 83 G4double G4EmSaturation::VisibleEnergyDeposition(
80 const G4 84 const G4ParticleDefinition* p,
81 const G4 << 85 const G4MaterialCutsCouple* couple,
82 G4double << 86 G4double length,
83 G4double << 87 G4double edep,
84 G4double << 88 G4double niel)
85 { 89 {
86 // no energy deposition <<
87 if(edep <= 0.0) { return 0.0; } 90 if(edep <= 0.0) { return 0.0; }
88 91
89 // zero step length may happens only if step <<
90 // is applied, in that case saturation shoul <<
91 if(length <= 0.0) { return edep; } <<
92 <<
93 G4double evis = edep; 92 G4double evis = edep;
94 G4double bfactor = couple->GetMaterial()->Ge << 93 G4double bfactor = FindBirksCoefficient(couple->GetMaterial());
95 94
96 if(bfactor > 0.0) { 95 if(bfactor > 0.0) {
97 96
>> 97 G4int pdgCode = p->GetPDGEncoding();
98 // atomic relaxations for gamma incident 98 // atomic relaxations for gamma incident
99 if(22 == p->GetPDGEncoding()) { << 99 if(22 == pdgCode && electron) {
100 //G4cout << "%% gamma edep= " << edep/ke << 100 //G4cout << "%% gamma edep= " << edep/keV << " keV " <<manager << G4endl;
101 evis /= (1.0 + bfactor*edep/ << 101 evis /= (1.0 + bfactor*edep/manager->GetRange(electron,edep,couple));
102 G4LossTableManager::Instance()->GetRan <<
103 102
104 // energy loss 103 // energy loss
105 } else { 104 } else {
106 105
107 // protections 106 // protections
108 G4double nloss = std::max(niel, 0.0); << 107 G4double nloss = niel;
>> 108 if(nloss < 0.0) { nloss = 0.0; }
109 G4double eloss = edep - nloss; 109 G4double eloss = edep - nloss;
110 110
111 // neutrons and neutral hadrons 111 // neutrons and neutral hadrons
112 if(0.0 == p->GetPDGCharge() || eloss < 0 << 112 if(0.0 == p->GetPDGCharge() || eloss < 0.0 || length <= 0.0) {
113 nloss = edep; << 113 nloss = edep;
114 eloss = 0.0; 114 eloss = 0.0;
115 } else { <<
116 <<
117 // continues energy loss <<
118 eloss /= (1.0 + bfactor*eloss/length); <<
119 } 115 }
>> 116
>> 117 // continues energy loss
>> 118 if(eloss > 0.0) { eloss /= (1.0 + bfactor*eloss/length); }
>> 119
120 // non-ionizing energy loss 120 // non-ionizing energy loss
121 if(nloss > 0.0) { << 121 if(nloss > 0.0 && proton) {
122 std::size_t idx = couple->GetMaterial( << 122 G4double escaled = nloss*curRatio;
123 G4double escaled = nloss*massFactors[i << 123 /*
124 /* <<
125 G4cout << "%% p edep= " << nloss/keV < 124 G4cout << "%% p edep= " << nloss/keV << " keV Escaled= "
126 << escaled << " MeV in " << co << 125 << escaled << " MeV in " << couple->GetMaterial()->GetName()
127 << " " << p->GetParticleName() << 126 << " " << p->GetParticleName()
128 << G4endl; << 127 << G4endl;
129 G4cout << proton->GetParticleName() << G4end <<
130 */ 128 */
131 G4double range = G4LossTableManager::I << 129 G4double range = manager->GetRange(proton,escaled,couple)/curChargeSq;
132 ->GetRange(proton,escaled,couple)/ef << 130 nloss /= (1.0 + bfactor*nloss/range);
133 nloss /= (1.0 + bfactor*nloss/range); <<
134 } 131 }
>> 132
135 evis = eloss + nloss; 133 evis = eloss + nloss;
136 } 134 }
137 } 135 }
>> 136
138 return evis; 137 return evis;
139 } 138 }
140 139
141 //....oooOO0OOooo........oooOO0OOooo........oo 140 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
142 141
143 void G4EmSaturation::InitialiseG4Saturation() <<
144 { <<
145 if(nMaterials == G4Material::GetNumberOfMate <<
146 nMaterials = G4Material::GetNumberOfMaterial <<
147 massFactors.resize(nMaterials, 1.0); <<
148 effCharges.resize(nMaterials, 1.0); <<
149 <<
150 if(0 == nG4Birks) { InitialiseG4materials() <<
151 <<
152 for(std::size_t i=0; i<nMaterials; ++i) { <<
153 InitialiseBirksCoefficient((*G4Material::G <<
154 } <<
155 if(verbose > 0) { DumpBirksCoefficients(); } <<
156 } <<
157 <<
158 //....oooOO0OOooo........oooOO0OOooo........oo <<
159 <<
160 G4double G4EmSaturation::FindG4BirksCoefficien 142 G4double G4EmSaturation::FindG4BirksCoefficient(const G4Material* mat)
161 { 143 {
162 if(0 == nG4Birks) { InitialiseG4materials() <<
163 <<
164 G4String name = mat->GetName(); 144 G4String name = mat->GetName();
165 // is this material in the vector? 145 // is this material in the vector?
166 146
167 for(G4int j=0; j<nG4Birks; ++j) { 147 for(G4int j=0; j<nG4Birks; ++j) {
168 if(name == g4MatNames[j]) { 148 if(name == g4MatNames[j]) {
169 if(verbose > 0) 149 if(verbose > 0)
170 G4cout << "### G4EmSaturation::FindG4B << 150 G4cout << "### G4EmSaturation::FindG4BirksCoefficient for "
171 << name << " is " << g4MatData[ << 151 << name << " is " << g4MatData[j]*MeV/mm << " mm/MeV "
172 << G4endl; << 152 << G4endl;
173 return g4MatData[j]; 153 return g4MatData[j];
174 } 154 }
175 } 155 }
176 return 0.0; << 156 return FindBirksCoefficient(mat);
177 } 157 }
178 158
179 //....oooOO0OOooo........oooOO0OOooo........oo 159 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
180 160
181 void G4EmSaturation::InitialiseBirksCoefficien 161 void G4EmSaturation::InitialiseBirksCoefficient(const G4Material* mat)
182 { 162 {
183 // electron and proton should exist in any c 163 // electron and proton should exist in any case
184 if(nullptr == electron) { << 164 if(!manager) {
>> 165 manager = G4LossTableManager::Instance();
185 electron = G4ParticleTable::GetParticleTab 166 electron = G4ParticleTable::GetParticleTable()->FindParticle("e-");
186 proton = G4ParticleTable::GetParticleTable 167 proton = G4ParticleTable::GetParticleTable()->FindParticle("proton");
187 if(nullptr == electron) { <<
188 G4Exception("G4EmSaturation::InitialiseB <<
189 FatalException, "electron should exist") <<
190 } <<
191 } 168 }
192 169
193 G4double curBirks = mat->GetIonisation()->Ge << 170 curMaterial = mat;
>> 171 curBirks = 0.0;
>> 172 curRatio = 1.0;
>> 173 curChargeSq = 1.0;
>> 174
>> 175 // seach in the run-time list
>> 176 for(G4int i=0; i<nMaterials; ++i) {
>> 177 if(mat == matPointers[i]) {
>> 178 curBirks = mat->GetIonisation()->GetBirksConstant();
>> 179 curRatio = massFactors[i];
>> 180 curChargeSq = effCharges[i];
>> 181 return;
>> 182 }
>> 183 }
194 184
195 G4String name = mat->GetName(); 185 G4String name = mat->GetName();
>> 186 curBirks = mat->GetIonisation()->GetBirksConstant();
196 187
197 // material has no Birks coeffitient defined 188 // material has no Birks coeffitient defined
198 // seach in the Geant4 list 189 // seach in the Geant4 list
199 if(curBirks == 0.0) { 190 if(curBirks == 0.0) {
200 for(G4int j=0; j<nG4Birks; ++j) { 191 for(G4int j=0; j<nG4Birks; ++j) {
201 if(name == g4MatNames[j]) { 192 if(name == g4MatNames[j]) {
202 mat->GetIonisation()->SetBirksConstant << 193 mat->GetIonisation()->SetBirksConstant(g4MatData[j]);
203 curBirks = g4MatData[j]; 194 curBirks = g4MatData[j];
204 break; 195 break;
205 } 196 }
206 } 197 }
207 } 198 }
208 199
209 if(curBirks == 0.0) { return; } << 200 if(curBirks == 0.0) {
>> 201 if(0 < nWarnings) {
>> 202 ++nWarnings;
>> 203 G4ExceptionDescription ed;
>> 204 ed << "Birks constants are not defined for material " << name
>> 205 << " ! \n Define Birks constants for the material"
>> 206 << " or not apply saturation.";
>> 207 G4Exception("G4EmSaturation::InitialiseBirksCoefficient", "em0088",
>> 208 JustWarning, ed);
>> 209 }
>> 210 return;
>> 211 }
210 212
211 // compute mean mass ratio 213 // compute mean mass ratio
212 G4double curRatio = 0.0; << 214 curRatio = 0.0;
213 G4double curChargeSq = 0.0; << 215 curChargeSq = 0.0;
214 G4double norm = 0.0; 216 G4double norm = 0.0;
215 const G4ElementVector* theElementVector = ma 217 const G4ElementVector* theElementVector = mat->GetElementVector();
216 const G4double* theAtomNumDensityVector = ma 218 const G4double* theAtomNumDensityVector = mat->GetVecNbOfAtomsPerVolume();
217 std::size_t nelm = mat->GetNumberOfElements( << 219 size_t nelm = mat->GetNumberOfElements();
218 for (std::size_t i=0; i<nelm; ++i) { << 220 for (size_t i=0; i<nelm; ++i) {
219 const G4Element* elm = (*theElementVector) 221 const G4Element* elm = (*theElementVector)[i];
220 G4int Z = elm->GetZasInt(); << 222 G4double Z = elm->GetZ();
221 G4double w = theAtomNumDensityVector[i]; << 223 G4double w = Z*Z*theAtomNumDensityVector[i];
222 curRatio += w/nist->GetAtomicMassAmu(Z); << 224 curRatio += w/nist->GetAtomicMassAmu(G4int(Z));
223 curChargeSq += (Z*Z)*w; << 225 curChargeSq = Z*Z*w;
224 norm += w; 226 norm += w;
225 } 227 }
226 if ( norm > 0.0) { norm = 1.0/norm; } << 228 curRatio *= proton_mass_c2/norm;
227 curRatio *= (CLHEP::proton_mass_c2*norm); << 229 curChargeSq /= norm;
228 curChargeSq *= norm; <<
229 230
230 // store results 231 // store results
231 std::size_t idx = mat->GetIndex(); << 232 matPointers.push_back(mat);
232 massFactors[idx] = curRatio; << 233 matNames.push_back(name);
233 effCharges[idx] = curChargeSq; << 234 massFactors.push_back(curRatio);
>> 235 effCharges.push_back(curChargeSq);
>> 236 nMaterials++;
>> 237 if(verbose > 0) {
>> 238 G4cout << "### G4EmSaturation::FindBirksCoefficient Birks coefficient for "
>> 239 << name << " " << curBirks*MeV/mm << " mm/MeV" << G4endl;
>> 240 }
>> 241 return;
234 } 242 }
235 243
236 //....oooOO0OOooo........oooOO0OOooo........oo 244 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
237 245
238 void G4EmSaturation::DumpBirksCoefficients() 246 void G4EmSaturation::DumpBirksCoefficients()
239 { 247 {
240 G4cout << "### Birks coefficients used in ru << 248 if(nMaterials > 0) {
241 const G4MaterialTable* mtable = G4Material:: << 249 G4cout << "### Birks coeffitients used in run time" << G4endl;
242 for(std::size_t i=0; i<nMaterials; ++i) { << 250 for(G4int i=0; i<nMaterials; ++i) {
243 const G4Material* mat = (*mtable)[i]; << 251 G4double br = matPointers[i]->GetIonisation()->GetBirksConstant();
244 G4double br = mat->GetIonisation()->GetBir << 252 G4cout << " " << matNames[i] << " "
245 if(br > 0.0) { <<
246 G4cout << " " << mat->GetName() << " <<
247 << br*MeV/mm << " mm/MeV" << " " 253 << br*MeV/mm << " mm/MeV" << " "
248 << br*mat->GetDensity()*MeV*cm2/g << 254 << br*matPointers[i]->GetDensity()*MeV*cm2/g
249 << " g/cm^2/MeV massFactor= " << mass << 255 << " g/cm^2/MeV"
250 << " effCharge= " << effCharges[i] << G << 256 << G4endl;
251 } 257 }
252 } 258 }
253 } 259 }
254 260
255 //....oooOO0OOooo........oooOO0OOooo........oo 261 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
256 262
257 void G4EmSaturation::DumpG4BirksCoefficients() 263 void G4EmSaturation::DumpG4BirksCoefficients()
258 { 264 {
259 if(nG4Birks > 0) { 265 if(nG4Birks > 0) {
260 G4cout << "### Birks coefficients for Gean << 266 G4cout << "### Birks coeffitients for Geant4 materials" << G4endl;
261 for(G4int i=0; i<nG4Birks; ++i) { 267 for(G4int i=0; i<nG4Birks; ++i) {
262 G4cout << " " << g4MatNames[i] << " 268 G4cout << " " << g4MatNames[i] << " "
263 << g4MatData[i]*MeV/mm << " mm/Me << 269 << g4MatData[i]*MeV/mm << " mm/MeV" << G4endl;
264 } 270 }
265 } 271 }
266 } 272 }
267 273
268 //....oooOO0OOooo........oooOO0OOooo........oo 274 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
269 275
270 void G4EmSaturation::InitialiseG4materials() 276 void G4EmSaturation::InitialiseG4materials()
271 { 277 {
272 nG4Birks = 4; <<
273 g4MatData.reserve(nG4Birks); <<
274 <<
275 // M.Hirschberg et al., IEEE Trans. Nuc. Sci 278 // M.Hirschberg et al., IEEE Trans. Nuc. Sci. 39 (1992) 511
276 // SCSN-38 kB = 0.00842 g/cm^2/MeV; rho = 1. 279 // SCSN-38 kB = 0.00842 g/cm^2/MeV; rho = 1.06 g/cm^3
277 g4MatNames.push_back("G4_POLYSTYRENE"); 280 g4MatNames.push_back("G4_POLYSTYRENE");
278 g4MatData.push_back(0.07943*mm/MeV); 281 g4MatData.push_back(0.07943*mm/MeV);
279 282
280 // C.Fabjan (private communication) 283 // C.Fabjan (private communication)
281 // kB = 0.006 g/cm^2/MeV; rho = 7.13 g/cm^3 284 // kB = 0.006 g/cm^2/MeV; rho = 7.13 g/cm^3
282 g4MatNames.push_back("G4_BGO"); 285 g4MatNames.push_back("G4_BGO");
283 g4MatData.push_back(0.008415*mm/MeV); 286 g4MatData.push_back(0.008415*mm/MeV);
284 287
285 // A.Ribon analysis of publications 288 // A.Ribon analysis of publications
286 // Scallettar et al., Phys. Rev. A25 (1982) 289 // Scallettar et al., Phys. Rev. A25 (1982) 2419.
287 // NIM A 523 (2004) 275. 290 // NIM A 523 (2004) 275.
288 // kB = 0.022 g/cm^2/MeV; rho = 1.396 g/cm^3 291 // kB = 0.022 g/cm^2/MeV; rho = 1.396 g/cm^3;
289 // ATLAS Efield = 10 kV/cm provide the stron << 292 // ATLAS Efield = 10 kV/cm provide the strongest effect
290 // kB = 0.1576*mm/MeV <<
291 // A. Kiryunin and P.Strizenec "Geant4 hadro <<
292 // working group meeting " kB = 0.041/9.13 g <<
293 g4MatNames.push_back("G4_lAr"); 293 g4MatNames.push_back("G4_lAr");
294 g4MatData.push_back(0.032*mm/MeV); << 294 g4MatData.push_back(0.1576*mm/MeV);
295 295
296 //G4_BARIUM_FLUORIDE 296 //G4_BARIUM_FLUORIDE
297 //G4_CESIUM_IODIDE 297 //G4_CESIUM_IODIDE
298 //G4_GEL_PHOTO_EMULSION 298 //G4_GEL_PHOTO_EMULSION
299 //G4_PHOTO_EMULSION 299 //G4_PHOTO_EMULSION
300 //G4_PLASTIC_SC_VINYLTOLUENE 300 //G4_PLASTIC_SC_VINYLTOLUENE
301 //G4_SODIUM_IODIDE 301 //G4_SODIUM_IODIDE
302 //G4_STILBENE 302 //G4_STILBENE
303 //G4_lAr 303 //G4_lAr
304 << 304 //G4_PbWO4
305 //G4_PbWO4 - CMS value <<
306 g4MatNames.push_back("G4_PbWO4"); <<
307 g4MatData.push_back(0.0333333*mm/MeV); <<
308 <<
309 //G4_Lucite 305 //G4_Lucite
310 306
>> 307 nG4Birks = g4MatData.size();
311 } 308 }
312 309
313 //....oooOO0OOooo........oooOO0OOooo........oo 310 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
314 311