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25 // 25 //
>> 26 // $Id: G4EmSaturation.cc,v 1.10 2009/09/25 09:16:40 vnivanch Exp $
>> 27 // GEANT4 tag $Name: geant4-09-03 $
26 // 28 //
27 // ------------------------------------------- 29 // -------------------------------------------------------------------
28 // 30 //
29 // GEANT4 Class file 31 // GEANT4 Class file
30 // 32 //
31 // 33 //
32 // File name: G4EmSaturation 34 // File name: G4EmSaturation
33 // 35 //
34 // Author: Vladimir Ivanchenko 36 // Author: Vladimir Ivanchenko
35 // 37 //
36 // Creation date: 18.02.2008 38 // Creation date: 18.02.2008
37 // 39 //
38 // Modifications: 40 // Modifications:
39 // 41 //
40 // ------------------------------------------- 42 // -------------------------------------------------------------
41 43
42 //....oooOO0OOooo........oooOO0OOooo........oo 44 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
43 //....oooOO0OOooo........oooOO0OOooo........oo 45 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
44 46
45 #include "G4EmSaturation.hh" 47 #include "G4EmSaturation.hh"
46 #include "G4PhysicalConstants.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 "G4Electron.hh"
>> 53 #include "G4Proton.hh"
53 54
54 //....oooOO0OOooo........oooOO0OOooo........oo 55 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
55 56
56 std::size_t G4EmSaturation::nMaterials = 0; << 57 G4EmSaturation::G4EmSaturation()
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) <<
63 { 58 {
64 verbose = verb; << 59 verbose = 1;
65 nWarnings = nG4Birks = 0; << 60 manager = 0;
66 << 61 curMaterial = 0;
67 electron = nullptr; << 62 curBirks = 0.0;
68 proton = nullptr; << 63 curRatio = 1.0;
69 nist = G4NistManager::Instance(); << 64 curChargeSq = 1.0;
70 InitialiseG4Saturation(); << 65 nMaterials = 0;
>> 66 electron = 0;
>> 67 Initialise();
71 } 68 }
72 69
73 //....oooOO0OOooo........oooOO0OOooo........oo 70 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
74 71
75 G4EmSaturation::~G4EmSaturation() = default; << 72 G4EmSaturation::~G4EmSaturation()
>> 73 {}
76 74
77 //....oooOO0OOooo........oooOO0OOooo........oo 75 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
78 76
79 G4double G4EmSaturation::VisibleEnergyDepositi 77 G4double G4EmSaturation::VisibleEnergyDeposition(
80 const G4 78 const G4ParticleDefinition* p,
81 const G4 << 79 const G4MaterialCutsCouple* couple,
82 G4double << 80 G4double length,
83 G4double << 81 G4double edep,
84 G4double << 82 G4double niel)
85 { 83 {
86 // no energy deposition << 84 if(edep <= 0.0) return 0.0;
87 if(edep <= 0.0) { return 0.0; } <<
88 <<
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 85
93 G4double evis = edep; 86 G4double evis = edep;
94 G4double bfactor = couple->GetMaterial()->Ge << 87 G4double bfactor = FindBirksCoefficient(couple->GetMaterial());
95 88
96 if(bfactor > 0.0) { 89 if(bfactor > 0.0) {
97 90
>> 91 G4int pdgCode = p->GetPDGEncoding();
98 // atomic relaxations for gamma incident 92 // atomic relaxations for gamma incident
99 if(22 == p->GetPDGEncoding()) { << 93 if(22 == pdgCode) {
100 //G4cout << "%% gamma edep= " << edep/ke << 94 evis /= (1.0 + bfactor*edep/manager->GetRange(electron,edep,couple));
101 evis /= (1.0 + bfactor*edep/ <<
102 G4LossTableManager::Instance()->GetRan <<
103 95
104 // energy loss 96 // energy loss
105 } else { 97 } else {
106 98
107 // protections 99 // protections
108 G4double nloss = std::max(niel, 0.0); << 100 G4double nloss = niel;
>> 101 if(nloss < 0.0) nloss = 0.0;
109 G4double eloss = edep - nloss; 102 G4double eloss = edep - nloss;
110 103
111 // neutrons and neutral hadrons << 104 // neutrons
112 if(0.0 == p->GetPDGCharge() || eloss < 0 << 105 if(2112 == pdgCode || eloss < 0.0 || length <= 0.0) {
113 nloss = edep; << 106 nloss = edep;
114 eloss = 0.0; 107 eloss = 0.0;
115 } else { <<
116 <<
117 // continues energy loss <<
118 eloss /= (1.0 + bfactor*eloss/length); <<
119 } 108 }
>> 109
>> 110 // continues energy loss
>> 111 if(eloss > 0.0) eloss /= (1.0 + bfactor*eloss/length);
>> 112
120 // non-ionizing energy loss 113 // non-ionizing energy loss
121 if(nloss > 0.0) { 114 if(nloss > 0.0) {
122 std::size_t idx = couple->GetMaterial( << 115 if(!proton) {proton = G4Proton::Proton();}
123 G4double escaled = nloss*massFactors[i << 116 G4double escaled = nloss*curRatio;
124 /* << 117 G4double s = manager->GetRange(proton,escaled,couple)/curChargeSq;
125 G4cout << "%% p edep= " << nloss/keV < << 118 nloss /= (1.0 + bfactor*nloss/s);
126 << escaled << " MeV in " << co <<
127 << " " << p->GetParticleName() <<
128 << G4endl; <<
129 G4cout << proton->GetParticleName() << G4end <<
130 */ <<
131 G4double range = G4LossTableManager::I <<
132 ->GetRange(proton,escaled,couple)/ef <<
133 nloss /= (1.0 + bfactor*nloss/range); <<
134 } 119 }
>> 120
135 evis = eloss + nloss; 121 evis = eloss + nloss;
136 } 122 }
137 } 123 }
>> 124
138 return evis; 125 return evis;
139 } 126 }
140 127
141 //....oooOO0OOooo........oooOO0OOooo........oo 128 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
142 129
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 130 G4double G4EmSaturation::FindG4BirksCoefficient(const G4Material* mat)
161 { 131 {
162 if(0 == nG4Birks) { InitialiseG4materials() <<
163 <<
164 G4String name = mat->GetName(); 132 G4String name = mat->GetName();
165 // is this material in the vector? 133 // is this material in the vector?
166 134
167 for(G4int j=0; j<nG4Birks; ++j) { << 135 for(G4int j=0; j<nG4Birks; j++) {
168 if(name == g4MatNames[j]) { 136 if(name == g4MatNames[j]) {
169 if(verbose > 0) 137 if(verbose > 0)
170 G4cout << "### G4EmSaturation::FindG4B << 138 G4cout << "### G4EmSaturation::FindG4BirksCoefficient for "
171 << name << " is " << g4MatData[ << 139 << name << " is " << g4MatData[j]*MeV/mm << " mm/MeV "
172 << G4endl; << 140 << G4endl;
173 return g4MatData[j]; 141 return g4MatData[j];
174 } 142 }
175 } 143 }
176 return 0.0; << 144 return FindBirksCoefficient(mat);
177 } 145 }
178 146
179 //....oooOO0OOooo........oooOO0OOooo........oo 147 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
180 148
181 void G4EmSaturation::InitialiseBirksCoefficien << 149 G4double G4EmSaturation::FindBirksCoefficient(const G4Material* mat)
182 { 150 {
183 // electron and proton should exist in any c << 151 // electron should exist in any case
184 if(nullptr == electron) { << 152 if(!manager) {
185 electron = G4ParticleTable::GetParticleTab << 153 manager = G4LossTableManager::Instance();
186 proton = G4ParticleTable::GetParticleTable << 154 nist = G4NistManager::Instance();
187 if(nullptr == electron) { << 155 electron= G4Electron::Electron();
188 G4Exception("G4EmSaturation::InitialiseB << 156 proton = 0;
189 FatalException, "electron should exist") <<
190 } <<
191 } 157 }
192 158
193 G4double curBirks = mat->GetIonisation()->Ge << 159 if(mat == curMaterial) return curBirks;
>> 160
>> 161 curMaterial = mat;
>> 162 curBirks = 0.0;
>> 163 curRatio = 1.0;
>> 164 curChargeSq = 1.0;
>> 165
>> 166 // seach in the run-time list
>> 167 for(G4int i=0; i<nMaterials; i++) {
>> 168 if(mat == matPointers[i]) {
>> 169 curBirks = mat->GetIonisation()->GetBirksConstant();
>> 170 curRatio = massFactors[i];
>> 171 curChargeSq = effCharges[i];
>> 172 return curBirks;
>> 173 }
>> 174 }
194 175
195 G4String name = mat->GetName(); 176 G4String name = mat->GetName();
>> 177 curBirks = mat->GetIonisation()->GetBirksConstant();
196 178
197 // material has no Birks coeffitient defined 179 // material has no Birks coeffitient defined
198 // seach in the Geant4 list 180 // seach in the Geant4 list
199 if(curBirks == 0.0) { 181 if(curBirks == 0.0) {
200 for(G4int j=0; j<nG4Birks; ++j) { << 182 for(G4int j=0; j<nG4Birks; j++) {
201 if(name == g4MatNames[j]) { 183 if(name == g4MatNames[j]) {
202 mat->GetIonisation()->SetBirksConstant << 184 mat->GetIonisation()->SetBirksConstant(g4MatData[j]);
203 curBirks = g4MatData[j]; 185 curBirks = g4MatData[j];
204 break; 186 break;
205 } 187 }
206 } 188 }
207 } 189 }
208 190
209 if(curBirks == 0.0) { return; } << 191 if(curBirks == 0.0 && verbose > 0) {
>> 192 G4cout << "### G4EmSaturation::FindBirksCoefficient fails "
>> 193 " for material " << name << G4endl;
>> 194 }
210 195
211 // compute mean mass ratio 196 // compute mean mass ratio
212 G4double curRatio = 0.0; << 197 curRatio = 0.0;
213 G4double curChargeSq = 0.0; << 198 curChargeSq = 0.0;
214 G4double norm = 0.0; 199 G4double norm = 0.0;
215 const G4ElementVector* theElementVector = ma 200 const G4ElementVector* theElementVector = mat->GetElementVector();
216 const G4double* theAtomNumDensityVector = ma 201 const G4double* theAtomNumDensityVector = mat->GetVecNbOfAtomsPerVolume();
217 std::size_t nelm = mat->GetNumberOfElements( << 202 size_t nelm = mat->GetNumberOfElements();
218 for (std::size_t i=0; i<nelm; ++i) { << 203 for (size_t i=0; i<nelm; i++) {
219 const G4Element* elm = (*theElementVector) 204 const G4Element* elm = (*theElementVector)[i];
220 G4int Z = elm->GetZasInt(); << 205 G4double Z = elm->GetZ();
221 G4double w = theAtomNumDensityVector[i]; << 206 G4double w = Z*Z*theAtomNumDensityVector[i];
222 curRatio += w/nist->GetAtomicMassAmu(Z); << 207 curRatio += w/nist->GetAtomicMassAmu(G4int(Z));
223 curChargeSq += (Z*Z)*w; << 208 curChargeSq = Z*Z*w;
224 norm += w; 209 norm += w;
225 } 210 }
226 if ( norm > 0.0) { norm = 1.0/norm; } << 211 curRatio *= proton_mass_c2/norm;
227 curRatio *= (CLHEP::proton_mass_c2*norm); << 212 curChargeSq /= norm;
228 curChargeSq *= norm; <<
229 213
230 // store results 214 // store results
231 std::size_t idx = mat->GetIndex(); << 215 matPointers.push_back(mat);
232 massFactors[idx] = curRatio; << 216 matNames.push_back(name);
233 effCharges[idx] = curChargeSq; << 217 massFactors.push_back(curRatio);
>> 218 effCharges.push_back(curChargeSq);
>> 219 nMaterials++;
>> 220 if(curBirks > 0.0 && verbose > 0) {
>> 221 G4cout << "### G4EmSaturation::FindBirksCoefficient Birks coefficient for "
>> 222 << name << " " << curBirks*MeV/mm << " mm/MeV" << G4endl;
>> 223 }
>> 224 return curBirks;
234 } 225 }
235 226
236 //....oooOO0OOooo........oooOO0OOooo........oo 227 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
237 228
238 void G4EmSaturation::DumpBirksCoefficients() 229 void G4EmSaturation::DumpBirksCoefficients()
239 { 230 {
240 G4cout << "### Birks coefficients used in ru << 231 if(nMaterials > 0) {
241 const G4MaterialTable* mtable = G4Material:: << 232 G4cout << "### Birks coeffitients used in run time" << G4endl;
242 for(std::size_t i=0; i<nMaterials; ++i) { << 233 for(G4int i=0; i<nMaterials; i++) {
243 const G4Material* mat = (*mtable)[i]; << 234 G4double br = matPointers[i]->GetIonisation()->GetBirksConstant();
244 G4double br = mat->GetIonisation()->GetBir << 235 G4cout << " " << matNames[i] << " "
245 if(br > 0.0) { <<
246 G4cout << " " << mat->GetName() << " <<
247 << br*MeV/mm << " mm/MeV" << " " 236 << br*MeV/mm << " mm/MeV" << " "
248 << br*mat->GetDensity()*MeV*cm2/g << 237 << br*matPointers[i]->GetDensity()*MeV*cm2/g
249 << " g/cm^2/MeV massFactor= " << mass << 238 << " g/cm^2/MeV"
250 << " effCharge= " << effCharges[i] << G << 239 << G4endl;
251 } 240 }
252 } 241 }
253 } 242 }
254 243
255 //....oooOO0OOooo........oooOO0OOooo........oo 244 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
256 245
257 void G4EmSaturation::DumpG4BirksCoefficients() 246 void G4EmSaturation::DumpG4BirksCoefficients()
258 { 247 {
259 if(nG4Birks > 0) { 248 if(nG4Birks > 0) {
260 G4cout << "### Birks coefficients for Gean << 249 G4cout << "### Birks coeffitients for Geant4 materials" << G4endl;
261 for(G4int i=0; i<nG4Birks; ++i) { << 250 for(G4int i=0; i<nG4Birks; i++) {
262 G4cout << " " << g4MatNames[i] << " 251 G4cout << " " << g4MatNames[i] << " "
263 << g4MatData[i]*MeV/mm << " mm/Me << 252 << g4MatData[i]*MeV/mm << " mm/MeV" << G4endl;
264 } 253 }
265 } 254 }
266 } 255 }
267 256
268 //....oooOO0OOooo........oooOO0OOooo........oo 257 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
269 258
270 void G4EmSaturation::InitialiseG4materials() << 259 void G4EmSaturation::Initialise()
271 { 260 {
272 nG4Birks = 4; <<
273 g4MatData.reserve(nG4Birks); <<
274 <<
275 // M.Hirschberg et al., IEEE Trans. Nuc. Sci 261 // M.Hirschberg et al., IEEE Trans. Nuc. Sci. 39 (1992) 511
276 // SCSN-38 kB = 0.00842 g/cm^2/MeV; rho = 1. 262 // SCSN-38 kB = 0.00842 g/cm^2/MeV; rho = 1.06 g/cm^3
277 g4MatNames.push_back("G4_POLYSTYRENE"); 263 g4MatNames.push_back("G4_POLYSTYRENE");
278 g4MatData.push_back(0.07943*mm/MeV); 264 g4MatData.push_back(0.07943*mm/MeV);
279 265
280 // C.Fabjan (private communication) 266 // C.Fabjan (private communication)
281 // kB = 0.006 g/cm^2/MeV; rho = 7.13 g/cm^3 267 // kB = 0.006 g/cm^2/MeV; rho = 7.13 g/cm^3
282 g4MatNames.push_back("G4_BGO"); 268 g4MatNames.push_back("G4_BGO");
283 g4MatData.push_back(0.008415*mm/MeV); 269 g4MatData.push_back(0.008415*mm/MeV);
284 270
285 // A.Ribon analysis of publications 271 // A.Ribon analysis of publications
286 // Scallettar et al., Phys. Rev. A25 (1982) 272 // Scallettar et al., Phys. Rev. A25 (1982) 2419.
287 // NIM A 523 (2004) 275. 273 // NIM A 523 (2004) 275.
288 // kB = 0.022 g/cm^2/MeV; rho = 1.396 g/cm^3 274 // kB = 0.022 g/cm^2/MeV; rho = 1.396 g/cm^3;
289 // ATLAS Efield = 10 kV/cm provide the stron << 275 // 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"); 276 g4MatNames.push_back("G4_lAr");
294 g4MatData.push_back(0.032*mm/MeV); << 277 g4MatData.push_back(0.1576*mm/MeV);
295 278
296 //G4_BARIUM_FLUORIDE 279 //G4_BARIUM_FLUORIDE
297 //G4_CESIUM_IODIDE 280 //G4_CESIUM_IODIDE
298 //G4_GEL_PHOTO_EMULSION 281 //G4_GEL_PHOTO_EMULSION
299 //G4_PHOTO_EMULSION 282 //G4_PHOTO_EMULSION
300 //G4_PLASTIC_SC_VINYLTOLUENE 283 //G4_PLASTIC_SC_VINYLTOLUENE
301 //G4_SODIUM_IODIDE 284 //G4_SODIUM_IODIDE
302 //G4_STILBENE 285 //G4_STILBENE
303 //G4_lAr 286 //G4_lAr
304 << 287 //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 288 //G4_Lucite
310 289
>> 290 nG4Birks = g4MatData.size();
311 } 291 }
312 292
313 //....oooOO0OOooo........oooOO0OOooo........oo 293 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
314 294