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26 // 26 //
>> 27 // $Id: G4OpWLS.cc,v 1.8 2006/06/29 21:08:56 gunter Exp $
>> 28 // GEANT4 tag $Name: geant4-08-03-patch-01 $
27 // 29 //
28 ////////////////////////////////////////////// 30 ////////////////////////////////////////////////////////////////////////
29 // Optical Photon WaveLength Shifting (WLS) Cl 31 // Optical Photon WaveLength Shifting (WLS) Class Implementation
30 ////////////////////////////////////////////// 32 ////////////////////////////////////////////////////////////////////////
31 // 33 //
32 // File: G4OpWLS.cc 34 // File: G4OpWLS.cc
33 // Description: Discrete Process -- Wavelength 35 // Description: Discrete Process -- Wavelength Shifting of Optical Photons
34 // Version: 1.0 36 // Version: 1.0
35 // Created: 2003-05-13 37 // Created: 2003-05-13
36 // Author: John Paul Archambault 38 // Author: John Paul Archambault
37 // (Adaptation of G4Scintillation 39 // (Adaptation of G4Scintillation and G4OpAbsorption)
38 // Updated: 2005-07-28 - add G4ProcessType 40 // Updated: 2005-07-28 - add G4ProcessType to constructor
39 // 2006-05-07 - add G4VWLSTimeGen 41 // 2006-05-07 - add G4VWLSTimeGeneratorProfile
>> 42 // mail: gum@triumf.ca
>> 43 // jparcham@phys.ualberta.ca
40 // 44 //
41 ////////////////////////////////////////////// 45 ////////////////////////////////////////////////////////////////////////
42 46
43 #include "G4OpWLS.hh" <<
44 #include "G4ios.hh" 47 #include "G4ios.hh"
45 #include "G4PhysicalConstants.hh" << 48 #include "G4OpWLS.hh"
46 #include "G4SystemOfUnits.hh" <<
47 #include "G4OpProcessSubType.hh" <<
48 #include "G4Poisson.hh" <<
49 #include "G4OpticalParameters.hh" <<
50 #include "G4WLSTimeGeneratorProfileDelta.hh" 49 #include "G4WLSTimeGeneratorProfileDelta.hh"
51 #include "G4WLSTimeGeneratorProfileExponential 50 #include "G4WLSTimeGeneratorProfileExponential.hh"
52 51
53 //....oooOO0OOooo........oooOO0OOooo........oo << 52 /////////////////////////
>> 53 // Class Implementation
>> 54 /////////////////////////
>> 55
>> 56 /////////////////
>> 57 // Constructors
>> 58 /////////////////
>> 59
54 G4OpWLS::G4OpWLS(const G4String& processName, 60 G4OpWLS::G4OpWLS(const G4String& processName, G4ProcessType type)
55 : G4VDiscreteProcess(processName, type) 61 : G4VDiscreteProcess(processName, type)
56 { 62 {
57 WLSTimeGeneratorProfile = nullptr; << 63 theIntegralTable = 0;
58 Initialise(); << 64
59 SetProcessSubType(fOpWLS); << 65 if (verboseLevel>0) {
60 theIntegralTable = nullptr; <<
61 <<
62 if(verboseLevel > 0) <<
63 G4cout << GetProcessName() << " is created 66 G4cout << GetProcessName() << " is created " << G4endl;
>> 67 }
>> 68
>> 69 WLSTimeGeneratorProfile =
>> 70 new G4WLSTimeGeneratorProfileDelta("WLSTimeGeneratorProfileDelta");
>> 71
>> 72 BuildThePhysicsTable();
64 } 73 }
65 74
66 //....oooOO0OOooo........oooOO0OOooo........oo << 75 ////////////////
>> 76 // Destructors
>> 77 ////////////////
>> 78
67 G4OpWLS::~G4OpWLS() 79 G4OpWLS::~G4OpWLS()
68 { 80 {
69 if(theIntegralTable) << 81 if (theIntegralTable != 0) {
70 { <<
71 theIntegralTable->clearAndDestroy(); 82 theIntegralTable->clearAndDestroy();
72 delete theIntegralTable; 83 delete theIntegralTable;
73 } 84 }
74 delete WLSTimeGeneratorProfile; 85 delete WLSTimeGeneratorProfile;
75 } 86 }
76 87
77 //....oooOO0OOooo........oooOO0OOooo........oo << 88 ////////////
78 void G4OpWLS::PreparePhysicsTable(const G4Part << 89 // Methods
79 << 90 ////////////
80 //....oooOO0OOooo........oooOO0OOooo........oo <<
81 void G4OpWLS::Initialise() <<
82 { <<
83 G4OpticalParameters* params = G4OpticalParam <<
84 SetVerboseLevel(params->GetWLSVerboseLevel() <<
85 UseTimeProfile(params->GetWLSTimeProfile()); <<
86 } <<
87 91
88 //....oooOO0OOooo........oooOO0OOooo........oo << 92 // PostStepDoIt
89 G4VParticleChange* G4OpWLS::PostStepDoIt(const << 93 // -------------
90 const << 94 //
>> 95 G4VParticleChange*
>> 96 G4OpWLS::PostStepDoIt(const G4Track& aTrack, const G4Step& aStep)
91 { 97 {
92 std::vector<G4Track*> proposedSecondaries; <<
93 aParticleChange.Initialize(aTrack); 98 aParticleChange.Initialize(aTrack);
>> 99
94 aParticleChange.ProposeTrackStatus(fStopAndK 100 aParticleChange.ProposeTrackStatus(fStopAndKill);
95 101
96 if(verboseLevel > 1) << 102 if (verboseLevel>0) {
97 { << 103 G4cout << "\n** Photon absorbed! **" << G4endl;
98 G4cout << "\n** G4OpWLS: Photon absorbed! <<
99 } 104 }
>> 105
>> 106 const G4Material* aMaterial = aTrack.GetMaterial();
100 107
101 G4StepPoint* pPostStepPoint = aStep.GetPostS 108 G4StepPoint* pPostStepPoint = aStep.GetPostStepPoint();
102 G4MaterialPropertiesTable* MPT = << 109
103 aTrack.GetMaterial()->GetMaterialPropertie << 110 G4MaterialPropertiesTable* aMaterialPropertiesTable =
104 if(!MPT) << 111 aMaterial->GetMaterialPropertiesTable();
105 { << 112 if (!aMaterialPropertiesTable)
106 return G4VDiscreteProcess::PostStepDoIt(aT 113 return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep);
107 } << 114
108 if(!MPT->GetProperty(kWLSCOMPONENT)) << 115 const G4MaterialPropertyVector* WLS_Intensity =
109 { << 116 aMaterialPropertiesTable->GetProperty("WLSCOMPONENT");
>> 117
>> 118 if (!WLS_Intensity)
110 return G4VDiscreteProcess::PostStepDoIt(aT 119 return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep);
111 } <<
112 120
113 G4int NumPhotons = 1; 121 G4int NumPhotons = 1;
114 if(MPT->ConstPropertyExists(kWLSMEANNUMBERPH << 122
115 { << 123 aParticleChange.SetNumberOfSecondaries(NumPhotons);
116 G4double MeanNumberOfPhotons = MPT->GetCon << 124
117 NumPhotons = G4int(G4Poi << 125 G4int materialIndex = aMaterial->GetIndex();
118 if(NumPhotons <= 0) <<
119 { <<
120 // return unchanged particle and no seco <<
121 aParticleChange.SetNumberOfSecondaries(0 <<
122 return G4VDiscreteProcess::PostStepDoIt( <<
123 } <<
124 } <<
125 126
126 // Retrieve the WLS Integral for this materi 127 // Retrieve the WLS Integral for this material
127 // new G4PhysicsFreeVector allocated to hold << 128 // new G4PhysicsOrderedFreeVector allocated to hold CII's
128 G4double primaryEnergy = aTrack.GetDynamicPa <<
129 G4double WLSTime = 0.; <<
130 G4PhysicsFreeVector* WLSIntegral = nullptr; <<
131 <<
132 WLSTime = MPT->GetConstProperty(kWLSTIME <<
133 WLSIntegral = (G4PhysicsFreeVector*) ((*theI <<
134 aTrack.GetMaterial()->GetIndex())); <<
135 129
136 // Max WLS Integral << 130 G4double WLSTime = 0.*ns;
137 G4double CIImax = WLSIntegral->GetMaxV << 131 G4PhysicsOrderedFreeVector* WLSIntegral = 0;
138 G4int NumberOfPhotons = NumPhotons; <<
139 132
140 for(G4int i = 0; i < NumPhotons; ++i) << 133 WLSTime = aMaterialPropertiesTable->
141 { << 134 GetConstProperty("WLSTIMECONSTANT");
142 G4double sampledEnergy; << 135 WLSIntegral =
143 // Make sure the energy of the secondary i << 136 (G4PhysicsOrderedFreeVector*)((*theIntegralTable)(materialIndex));
144 for(G4int j = 1; j <= 100; ++j) << 137
145 { << 138 // Max WLS Integral
146 // Determine photon energy << 139
147 G4double CIIvalue = G4UniformRand() * CI << 140 G4double CIImax = WLSIntegral->GetMaxValue();
148 sampledEnergy = WLSIntegral->GetEner << 141
149 if(sampledEnergy <= primaryEnergy) << 142 for (G4int i = 0; i < NumPhotons; i++) {
150 break; << 143
151 } << 144 // Determine photon momentum
152 // If no such energy can be sampled, retur << 145
153 if(sampledEnergy > primaryEnergy) << 146 G4double CIIvalue = G4UniformRand()*CIImax;
154 { << 147 G4double sampledMomentum =
155 if(verboseLevel > 1) << 148 WLSIntegral->GetEnergy(CIIvalue);
156 { << 149
157 G4cout << " *** G4OpWLS: One less WLS << 150 if (verboseLevel>1) {
158 << G4endl; << 151 G4cout << "sampledMomentum = " << sampledMomentum << G4endl;
159 } << 152 G4cout << "CIIvalue = " << CIIvalue << G4endl;
160 NumberOfPhotons--; <<
161 if(NumberOfPhotons == 0) <<
162 { <<
163 if(verboseLevel > 1) <<
164 { <<
165 G4cout <<
166 << " *** G4OpWLS: No WLS photon ca <<
167 << G4endl; <<
168 } <<
169 // return unchanged particle and no se <<
170 aParticleChange.SetNumberOfSecondaries <<
171 return G4VDiscreteProcess::PostStepDoI <<
172 } <<
173 continue; <<
174 } <<
175 else if(verboseLevel > 1) <<
176 { <<
177 G4cout << "G4OpWLS: Created photon with <<
178 << G4endl; <<
179 } 153 }
180 << 154
181 // Generate random photon direction 155 // Generate random photon direction
182 G4double cost = 1. - 2. * G4UniformRand(); << 156
183 G4double sint = std::sqrt((1. - cost) * (1 << 157 G4double cost = 1. - 2.*G4UniformRand();
184 G4double phi = twopi * G4UniformRand(); << 158 G4double sint = std::sqrt((1.-cost)*(1.+cost));
>> 159
>> 160 G4double phi = twopi*G4UniformRand();
185 G4double sinp = std::sin(phi); 161 G4double sinp = std::sin(phi);
186 G4double cosp = std::cos(phi); 162 G4double cosp = std::cos(phi);
187 G4ParticleMomentum photonMomentum(sint * c << 163
188 << 164 G4double px = sint*cosp;
189 G4ThreeVector photonPolarization(cost * co << 165 G4double py = sint*sinp;
>> 166 G4double pz = cost;
>> 167
>> 168 // Create photon momentum direction vector
>> 169
>> 170 G4ParticleMomentum photonMomentum(px, py, pz);
>> 171
>> 172 // Determine polarization of new photon
>> 173
>> 174 G4double sx = cost*cosp;
>> 175 G4double sy = cost*sinp;
>> 176 G4double sz = -sint;
>> 177
>> 178 G4ThreeVector photonPolarization(sx, sy, sz);
>> 179
190 G4ThreeVector perp = photonMomentum.cross( 180 G4ThreeVector perp = photonMomentum.cross(photonPolarization);
191 << 181
192 phi = twopi * G4UniformRand << 182 phi = twopi*G4UniformRand();
193 sinp = std::sin(phi); << 183 sinp = std::sin(phi);
194 cosp = std::cos(phi); << 184 cosp = std::cos(phi);
195 photonPolarization = (cosp * photonPolariz << 185
196 << 186 photonPolarization = cosp * photonPolarization + sinp * perp;
>> 187
>> 188 photonPolarization = photonPolarization.unit();
>> 189
197 // Generate a new photon: 190 // Generate a new photon:
198 auto sec_dp = << 191
199 new G4DynamicParticle(G4OpticalPhoton::O << 192 G4DynamicParticle* aWLSPhoton =
200 sec_dp->SetPolarization(photonPolarization << 193 new G4DynamicParticle(G4OpticalPhoton::OpticalPhoton(),
201 sec_dp->SetKineticEnergy(sampledEnergy); << 194 photonMomentum);
202 << 195 aWLSPhoton->SetPolarization
203 G4double secTime = pPostStepPoint->GetGlob << 196 (photonPolarization.x(),
204 WLSTimeGeneratorProfile << 197 photonPolarization.y(),
205 G4ThreeVector secPos = pPostStepPoint->Get << 198 photonPolarization.z());
206 G4Track* secTrack = new G4Track(sec_dp, << 199
207 << 200 aWLSPhoton->SetKineticEnergy(sampledMomentum);
208 secTrack->SetTouchableHandle(aTrack.GetTou << 201
209 secTrack->SetParentID(aTrack.GetTrackID()) << 202 // Generate new G4Track object:
210 << 203
211 proposedSecondaries.push_back(secTrack); << 204 // Must give position of WLS optical photon
212 } << 205
213 << 206 G4double TimeDelay = WLSTimeGeneratorProfile->GenerateTime(WLSTime);
214 aParticleChange.SetNumberOfSecondaries((G4in << 207 G4double aSecondaryTime = (pPostStepPoint->GetGlobalTime()) + TimeDelay;
215 for(auto sec : proposedSecondaries) << 208
216 { << 209 G4ThreeVector aSecondaryPosition = pPostStepPoint->GetPosition();
217 aParticleChange.AddSecondary(sec); << 210
218 } << 211 G4Track* aSecondaryTrack =
219 if(verboseLevel > 1) << 212 new G4Track(aWLSPhoton,aSecondaryTime,aSecondaryPosition);
220 { << 213
221 G4cout << "\n Exiting from G4OpWLS::DoIt - << 214 aSecondaryTrack->SetTouchableHandle((G4VTouchable*)0);
222 << aParticleChange.GetNumberOfSecon << 215
>> 216 aSecondaryTrack->SetParentID(aTrack.GetTrackID());
>> 217
>> 218 aParticleChange.AddSecondary(aSecondaryTrack);
>> 219 }
>> 220
>> 221 if (verboseLevel>0) {
>> 222 G4cout << "\n Exiting from G4OpWLS::DoIt -- NumberOfSecondaries = "
>> 223 << aParticleChange.GetNumberOfSecondaries() << G4endl;
223 } 224 }
224 << 225
225 return G4VDiscreteProcess::PostStepDoIt(aTra 226 return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep);
226 } 227 }
227 228
228 //....oooOO0OOooo........oooOO0OOooo........oo << 229 // BuildThePhysicsTable for the wavelength shifting process
229 void G4OpWLS::BuildPhysicsTable(const G4Partic << 230 // --------------------------------------------------
230 { << 231 //
231 if(theIntegralTable) <<
232 { <<
233 theIntegralTable->clearAndDestroy(); <<
234 delete theIntegralTable; <<
235 theIntegralTable = nullptr; <<
236 } <<
237 <<
238 const G4MaterialTable* materialTable = G4Mat <<
239 std::size_t numOfMaterials = G4Mat <<
240 theIntegralTable = new G <<
241 232
>> 233 void G4OpWLS::BuildThePhysicsTable()
>> 234 {
>> 235 if (theIntegralTable) return;
>> 236
>> 237 const G4MaterialTable* theMaterialTable =
>> 238 G4Material::GetMaterialTable();
>> 239 G4int numOfMaterials = G4Material::GetNumberOfMaterials();
>> 240
>> 241 // create new physics table
>> 242
>> 243 if(!theIntegralTable)theIntegralTable = new G4PhysicsTable(numOfMaterials);
>> 244
242 // loop for materials 245 // loop for materials
243 for(std::size_t i = 0; i < numOfMaterials; + << 246
244 { << 247 for (G4int i=0 ; i < numOfMaterials; i++)
245 auto physVector = new G4PhysicsFreeVector( <<
246 <<
247 // Retrieve vector of WLS wavelength inten <<
248 // the material from the material's optica <<
249 G4MaterialPropertiesTable* MPT = <<
250 (*materialTable)[i]->GetMaterialProperti <<
251 if(MPT) <<
252 { 248 {
253 G4MaterialPropertyVector* wlsVector = MP << 249 G4PhysicsOrderedFreeVector* aPhysicsOrderedFreeVector =
254 if(wlsVector) << 250 new G4PhysicsOrderedFreeVector();
255 { << 251
256 // Retrieve the first intensity point << 252 // Retrieve vector of WLS wavelength intensity for
257 // of (photon energy, intensity) pairs << 253 // the material from the material's optical properties table.
258 G4double currentIN = (*wlsVector)[0]; << 254
259 if(currentIN >= 0.0) << 255 G4Material* aMaterial = (*theMaterialTable)[i];
260 { << 256
261 // Create first (photon energy) << 257 G4MaterialPropertiesTable* aMaterialPropertiesTable =
262 G4double currentPM = wlsVector->Ene << 258 aMaterial->GetMaterialPropertiesTable();
263 G4double currentCII = 0.0; << 259
264 physVector->InsertValues(currentPM, << 260 if (aMaterialPropertiesTable) {
265 << 261
266 // Set previous values to current on << 262 G4MaterialPropertyVector* theWLSVector =
267 G4double prevPM = currentPM; << 263 aMaterialPropertiesTable->GetProperty("WLSCOMPONENT");
268 G4double prevCII = currentCII; << 264
269 G4double prevIN = currentIN; << 265 if (theWLSVector) {
270 << 266
271 // loop over all (photon energy, int << 267 // Retrieve the first intensity point in vector
272 // pairs stored for this material << 268 // of (photon momentum, intensity) pairs
273 for(std::size_t j = 1; j < wlsVector << 269
274 { << 270 theWLSVector->ResetIterator();
275 currentPM = wlsVector->Energy(j); << 271 ++(*theWLSVector); // advance to 1st entry
276 currentIN = (*wlsVector)[j]; << 272
277 currentCII = << 273 G4double currentIN = theWLSVector->
278 prevCII + 0.5 * (currentPM - pre << 274 GetProperty();
279 << 275
280 physVector->InsertValues(currentPM << 276 if (currentIN >= 0.0) {
281 << 277
282 prevPM = currentPM; << 278 // Create first (photon momentum)
283 prevCII = currentCII; << 279
284 prevIN = currentIN; << 280 G4double currentPM = theWLSVector->
285 } << 281 GetPhotonMomentum();
286 } << 282
>> 283 G4double currentCII = 0.0;
>> 284
>> 285 aPhysicsOrderedFreeVector->
>> 286 InsertValues(currentPM , currentCII);
>> 287
>> 288 // Set previous values to current ones prior to loop
>> 289
>> 290 G4double prevPM = currentPM;
>> 291 G4double prevCII = currentCII;
>> 292 G4double prevIN = currentIN;
>> 293
>> 294 // loop over all (photon momentum, intensity)
>> 295 // pairs stored for this material
>> 296
>> 297 while(++(*theWLSVector))
>> 298 {
>> 299 currentPM = theWLSVector->
>> 300 GetPhotonMomentum();
>> 301
>> 302 currentIN=theWLSVector->
>> 303 GetProperty();
>> 304
>> 305 currentCII = 0.5 * (prevIN + currentIN);
>> 306
>> 307 currentCII = prevCII +
>> 308 (currentPM - prevPM) * currentCII;
>> 309
>> 310 aPhysicsOrderedFreeVector->
>> 311 InsertValues(currentPM, currentCII);
>> 312
>> 313 prevPM = currentPM;
>> 314 prevCII = currentCII;
>> 315 prevIN = currentIN;
>> 316 }
>> 317 }
>> 318 }
287 } 319 }
>> 320 // The WLS integral for a given material
>> 321 // will be inserted in the table according to the
>> 322 // position of the material in the material table.
>> 323
>> 324 theIntegralTable->insertAt(i,aPhysicsOrderedFreeVector);
288 } 325 }
289 theIntegralTable->insertAt(i, physVector); <<
290 } <<
291 } 326 }
292 327
293 //....oooOO0OOooo........oooOO0OOooo........oo << 328 // GetMeanFreePath
294 G4double G4OpWLS::GetMeanFreePath(const G4Trac << 329 // ---------------
295 G4ForceCondi << 330 //
>> 331 G4double G4OpWLS::GetMeanFreePath(const G4Track& aTrack,
>> 332 G4double ,
>> 333 G4ForceCondition* )
296 { 334 {
297 G4double thePhotonEnergy = aTrack.GetDynamic << 335 const G4DynamicParticle* aParticle = aTrack.GetDynamicParticle();
298 G4double attLength = DBL_MAX; << 336 const G4Material* aMaterial = aTrack.GetMaterial();
299 G4MaterialPropertiesTable* MPT = << 337
300 aTrack.GetMaterial()->GetMaterialPropertie << 338 G4double thePhotonMomentum = aParticle->GetTotalMomentum();
301 << 339
302 if(MPT) << 340 G4MaterialPropertiesTable* aMaterialPropertyTable;
303 { << 341 G4MaterialPropertyVector* AttenuationLengthVector;
304 G4MaterialPropertyVector* attVector = MPT- << 342
305 if(attVector) << 343 G4double AttenuationLength = DBL_MAX;
306 { << 344
307 attLength = attVector->Value(thePhotonEn << 345 aMaterialPropertyTable = aMaterial->GetMaterialPropertiesTable();
>> 346
>> 347 if ( aMaterialPropertyTable ) {
>> 348 AttenuationLengthVector = aMaterialPropertyTable->
>> 349 GetProperty("WLSABSLENGTH");
>> 350 if ( AttenuationLengthVector ){
>> 351 AttenuationLength = AttenuationLengthVector->
>> 352 GetProperty (thePhotonMomentum);
>> 353 }
>> 354 else {
>> 355 // G4cout << "No WLS absorption length specified" << G4endl;
308 } 356 }
309 } 357 }
310 return attLength; << 358 else {
>> 359 // G4cout << "No WLS absortion length specified" << G4endl;
>> 360 }
>> 361
>> 362 return AttenuationLength;
311 } 363 }
312 364
313 //....oooOO0OOooo........oooOO0OOooo........oo <<
314 void G4OpWLS::UseTimeProfile(const G4String na 365 void G4OpWLS::UseTimeProfile(const G4String name)
315 { 366 {
316 if(WLSTimeGeneratorProfile) << 367 if (name == "delta")
317 { << 368 {
318 delete WLSTimeGeneratorProfile; << 369 delete WLSTimeGeneratorProfile;
319 WLSTimeGeneratorProfile = nullptr; << 370 WLSTimeGeneratorProfile =
320 } << 371 new G4WLSTimeGeneratorProfileDelta("delta");
321 if(name == "delta") << 372 }
322 { << 373 else if (name == "exponential")
323 WLSTimeGeneratorProfile = new G4WLSTimeGen << 374 {
324 } << 375 delete WLSTimeGeneratorProfile;
325 else if(name == "exponential") << 376 WLSTimeGeneratorProfile =
326 { << 377 new G4WLSTimeGeneratorProfileExponential("exponential");
327 WLSTimeGeneratorProfile = << 378 }
328 new G4WLSTimeGeneratorProfileExponential <<
329 } <<
330 else 379 else
331 { << 380 {
332 G4Exception("G4OpWLS::UseTimeProfile", "em << 381 G4Exception("G4OpWLS::UseTimeProfile - generator does not exist");
333 "generator does not exist"); << 382 }
334 } <<
335 G4OpticalParameters::Instance()->SetWLSTimeP <<
336 } <<
337 <<
338 //....oooOO0OOooo........oooOO0OOooo........oo <<
339 void G4OpWLS::SetVerboseLevel(G4int verbose) <<
340 { <<
341 verboseLevel = verbose; <<
342 G4OpticalParameters::Instance()->SetWLSVerbo <<
343 } 383 }
344 384