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25 // 22 //
26 // 23 //
>> 24 // $Id: G4OpBoundaryProcess.hh,v 1.8 2002/03/29 01:03:53 gum Exp $
>> 25 // GEANT4 tag $Name: geant4-05-02 $
27 // 26 //
28 // << 27 //
29 ////////////////////////////////////////////// 28 ////////////////////////////////////////////////////////////////////////
30 // Optical Photon Boundary Process Class Defin 29 // Optical Photon Boundary Process Class Definition
31 ////////////////////////////////////////////// 30 ////////////////////////////////////////////////////////////////////////
32 // 31 //
33 // File: G4OpBoundaryProcess.hh 32 // File: G4OpBoundaryProcess.hh
34 // Description: Discrete Process -- reflection 33 // Description: Discrete Process -- reflection/refraction at
35 // optical in 34 // optical interfaces
36 // Version: 1.1 35 // Version: 1.1
37 // Created: 1997-06-18 36 // Created: 1997-06-18
38 // Modified: 2005-07-28 add G4ProcessType t << 37 // Modified: 1999-10-29 add method and class descriptors
39 // 1999-10-29 add method and clas << 38 // 1999-10-10 - Fill NewMomentum/NewPolarization in
40 // 1999-10-10 - Fill NewMomentum/ <<
41 // DoAbsorption. The 39 // DoAbsorption. These members need to be
42 // filled since DoIt << 40 // filled since DoIt calls
43 // aParticleChange.S 41 // aParticleChange.SetMomentumChange etc.
44 // upon return (than 42 // upon return (thanks to: Clark McGrew)
45 // 2006-11-04 - add capability of <<
46 // off a metal surfa <<
47 // of refraction - T <<
48 // Hauptman (Dept. o <<
49 // 2009-11-10 - add capability of <<
50 // with Look-Up-Tabl <<
51 // optical reflectan <<
52 // treatments - Than <<
53 // William Moses (La <<
54 // 2013-06-01 - add the capabilit <<
55 // of a dichronic fi <<
56 // 2017-02-24 - add capability of <<
57 // with Look-Up-Tabl <<
58 // 43 //
59 // Author: Peter Gumplinger 44 // Author: Peter Gumplinger
60 // adopted from work by Werner Ke 45 // adopted from work by Werner Keil - April 2/96
>> 46 // mail: gum@triumf.ca
61 // 47 //
>> 48 // CVS version tag:
62 ////////////////////////////////////////////// 49 ////////////////////////////////////////////////////////////////////////
63 50
64 #ifndef G4OpBoundaryProcess_h 51 #ifndef G4OpBoundaryProcess_h
65 #define G4OpBoundaryProcess_h 1 52 #define G4OpBoundaryProcess_h 1
66 53
67 #include "G4OpticalPhoton.hh" << 54 /////////////
68 #include "G4OpticalSurface.hh" << 55 // Includes
69 #include "G4RandomTools.hh" << 56 /////////////
>> 57
>> 58 #include "globals.hh"
>> 59 #include "templates.hh"
>> 60 #include "geomdefs.hh"
>> 61 #include "Randomize.hh"
>> 62 #include "G4Step.hh"
70 #include "G4VDiscreteProcess.hh" 63 #include "G4VDiscreteProcess.hh"
>> 64 #include "G4DynamicParticle.hh"
>> 65 #include "G4Material.hh"
>> 66 #include "G4LogicalBorderSurface.hh"
>> 67 #include "G4LogicalSkinSurface.hh"
>> 68 #include "G4OpticalSurface.hh"
>> 69 #include "G4OpticalPhoton.hh"
>> 70 #include "G4TransportationManager.hh"
71 71
72 enum G4OpBoundaryProcessStatus << 72 // Class Description:
73 { << 73 // Discrete Process -- reflection/refraction at optical interfaces.
74 Undefined, << 74 // Class inherits publicly from G4VDiscreteProcess.
75 Transmission, << 75 // Class Description - End:
76 FresnelRefraction, << 76
77 FresnelReflection, << 77 /////////////////////
78 TotalInternalReflection, << 78 // Class Definition
79 LambertianReflection, << 79 /////////////////////
80 LobeReflection, << 80
81 SpikeReflection, << 81 enum G4OpBoundaryProcessStatus { Undefined,
82 BackScattering, << 82 FresnelRefraction, FresnelReflection,
83 Absorption, << 83 TotalInternalReflection,
84 Detection, << 84 LambertianReflection, LobeReflection,
85 NotAtBoundary, << 85 SpikeReflection, BackScattering,
86 SameMaterial, << 86 Absorption, Detection };
87 StepTooSmall, <<
88 NoRINDEX, <<
89 PolishedLumirrorAirReflection, <<
90 PolishedLumirrorGlueReflection, <<
91 PolishedAirReflection, <<
92 PolishedTeflonAirReflection, <<
93 PolishedTiOAirReflection, <<
94 PolishedTyvekAirReflection, <<
95 PolishedVM2000AirReflection, <<
96 PolishedVM2000GlueReflection, <<
97 EtchedLumirrorAirReflection, <<
98 EtchedLumirrorGlueReflection, <<
99 EtchedAirReflection, <<
100 EtchedTeflonAirReflection, <<
101 EtchedTiOAirReflection, <<
102 EtchedTyvekAirReflection, <<
103 EtchedVM2000AirReflection, <<
104 EtchedVM2000GlueReflection, <<
105 GroundLumirrorAirReflection, <<
106 GroundLumirrorGlueReflection, <<
107 GroundAirReflection, <<
108 GroundTeflonAirReflection, <<
109 GroundTiOAirReflection, <<
110 GroundTyvekAirReflection, <<
111 GroundVM2000AirReflection, <<
112 GroundVM2000GlueReflection, <<
113 Dichroic, <<
114 CoatedDielectricReflection, <<
115 CoatedDielectricRefraction, <<
116 CoatedDielectricFrustratedTransmission <<
117 }; <<
118 87
119 class G4OpBoundaryProcess : public G4VDiscrete << 88 class G4OpBoundaryProcess : public G4VDiscreteProcess
120 { 89 {
121 public: <<
122 explicit G4OpBoundaryProcess(const G4String& <<
123 G4ProcessType t <<
124 virtual ~G4OpBoundaryProcess(); <<
125 90
126 virtual G4bool IsApplicable( << 91 private:
127 const G4ParticleDefinition& aParticleType) << 92
128 // Returns true -> 'is applicable' only for << 93 //////////////
>> 94 // Operators
>> 95 //////////////
>> 96
>> 97 // G4OpBoundaryProcess& operator=(const G4OpBoundaryProcess &right);
129 98
130 virtual G4double GetMeanFreePath(const G4Tra << 99 // G4OpBoundaryProcess(const G4OpBoundaryProcess &right);
131 G4ForceCond <<
132 // Returns infinity; i. e. the process does <<
133 // 'Forced' condition for the DoIt to be inv <<
134 // at a boundary will any action be taken. <<
135 100
136 G4VParticleChange* PostStepDoIt(const G4Trac << 101 public: // Without description
137 const G4Step <<
138 // This is the method implementing boundary <<
139 102
140 virtual G4OpBoundaryProcessStatus GetStatus( << 103 ////////////////////////////////
141 // Returns the current status. << 104 // Constructors and Destructor
>> 105 ////////////////////////////////
142 106
143 virtual void SetInvokeSD(G4bool); << 107 G4OpBoundaryProcess(const G4String& processName = "OpBoundary");
144 // Set flag for call to InvokeSD method. <<
145 108
146 virtual void PreparePhysicsTable(const G4Par << 109 ~G4OpBoundaryProcess();
147 110
148 virtual void Initialise(); << 111 ////////////
>> 112 // Methods
>> 113 ////////////
149 114
150 void SetVerboseLevel(G4int); << 115 public: // With description
151 116
152 private: << 117 G4bool IsApplicable(const G4ParticleDefinition& aParticleType);
153 G4OpBoundaryProcess(const G4OpBoundaryProces << 118 // Returns true -> 'is applicable' only for an optical photon.
154 G4OpBoundaryProcess& operator=(const G4OpBou <<
155 119
156 G4bool G4BooleanRand(const G4double prob) co << 120 G4double GetMeanFreePath(const G4Track& ,
>> 121 G4double ,
>> 122 G4ForceCondition* condition);
>> 123 // Returns infinity; i. e. the process does not limit the step,
>> 124 // but sets the 'Forced' condition for the DoIt to be invoked at
>> 125 // every step. However, only at a boundary will any action be
>> 126 // taken.
157 127
158 G4ThreeVector GetFacetNormal(const G4ThreeVe << 128 G4VParticleChange* PostStepDoIt(const G4Track& aTrack,
159 const G4ThreeVe << 129 const G4Step& aStep);
>> 130 // This is the method implementing boundary processes.
160 131
161 void DielectricMetal(); << 132 G4OpticalSurfaceModel GetModel() const;
162 void DielectricDielectric(); << 133 // Returns the optical surface mode.
163 134
164 void DielectricLUT(); << 135 G4OpBoundaryProcessStatus GetStatus() const;
165 void DielectricLUTDAVIS(); << 136 // Returns the current status.
166 137
167 void DielectricDichroic(); << 138 void SetModel(G4OpticalSurfaceModel model);
168 void CoatedDielectricDielectric(); << 139 // Set the optical surface model to be followed
>> 140 // (glisur || unified).
169 141
170 void ChooseReflection(); << 142 private:
171 void DoAbsorption(); <<
172 void DoReflection(); <<
173 143
174 G4double GetIncidentAngle(); << 144 void G4Swap(G4double* a, G4double* b) const;
175 // Returns the incident angle of optical pho <<
176 145
177 G4double GetReflectivity(G4double E1_perp, G << 146 void G4Swap(G4Material* a, G4Material* b) const;
178 G4double incidentan <<
179 G4double ImaginaryR <<
180 // Returns the Reflectivity on a metallic su <<
181 147
182 G4double GetReflectivityThroughThinLayer(G4d << 148 void G4VectorSwap(G4ThreeVector* vec1, G4ThreeVector* vec2) const;
183 G4d <<
184 G4d <<
185 // Returns the Reflectivity on a coated surf <<
186 149
187 void CalculateReflectivity(); << 150 G4bool G4BooleanRand(const G4double prob) const;
188 151
189 void BoundaryProcessVerbose() const; << 152 G4ThreeVector G4IsotropicRand() const;
190 153
191 // Invoke SD for post step point if the phot << 154 G4ThreeVector G4LambertianRand(const G4ThreeVector& normal);
192 G4bool InvokeSD(const G4Step* step); <<
193 155
194 G4ThreeVector fOldMomentum; << 156 G4ThreeVector G4PlaneVectorRand(const G4ThreeVector& normal) const;
195 G4ThreeVector fOldPolarization; <<
196 157
197 G4ThreeVector fNewMomentum; << 158 G4ThreeVector GetFacetNormal(const G4ThreeVector& Momentum,
198 G4ThreeVector fNewPolarization; << 159 const G4ThreeVector& Normal) const;
199 160
200 G4ThreeVector fGlobalNormal; << 161 void DielectricMetal();
201 G4ThreeVector fFacetNormal; << 162 void DielectricDielectric();
202 163
203 const G4Material* fMaterial1; << 164 void ChooseReflection();
204 const G4Material* fMaterial2; << 165 void DoAbsorption();
>> 166 void DoReflection();
205 167
206 G4OpticalSurface* fOpticalSurface; << 168 private:
207 169
208 G4MaterialPropertyVector* fRealRIndexMPV; << 170 G4double thePhotonMomentum;
209 G4MaterialPropertyVector* fImagRIndexMPV; <<
210 G4Physics2DVector* fDichroicVector; <<
211 171
212 G4double fPhotonMomentum; << 172 G4ThreeVector OldMomentum;
213 G4double fRindex1; << 173 G4ThreeVector OldPolarization;
214 G4double fRindex2; <<
215 174
216 G4double fSint1; << 175 G4ThreeVector NewMomentum;
>> 176 G4ThreeVector NewPolarization;
217 177
218 G4double fReflectivity; << 178 G4ThreeVector theGlobalNormal;
219 G4double fEfficiency; << 179 G4ThreeVector theFacetNormal;
220 G4double fTransmittance; <<
221 G4double fSurfaceRoughness; <<
222 180
223 G4double fProb_sl, fProb_ss, fProb_bs; << 181 G4Material* Material1;
224 G4double fCarTolerance; << 182 G4Material* Material2;
225 183
226 // Used by CoatedDielectricDielectric() << 184 G4OpticalSurface* OpticalSurface;
227 G4double fCoatedRindex, fCoatedThickness; <<
228 185
229 G4OpBoundaryProcessStatus fStatus; << 186 G4double Rindex1;
230 G4OpticalSurfaceModel fModel; << 187 G4double Rindex2;
231 G4OpticalSurfaceFinish fFinish; <<
232 188
233 G4int f_iTE, f_iTM; << 189 G4double cost1, cost2, sint1, sint2;
234 190
235 G4int fNumSmallStepWarnings = 0; // number o << 191 G4OpBoundaryProcessStatus theStatus;
236 G4int fNumBdryTypeWarnings = 0; // number o <<
237 192
238 size_t idx_dichroicX = 0; << 193 G4OpticalSurfaceModel theModel;
239 size_t idx_dichroicY = 0; <<
240 size_t idx_rindex1 = 0; <<
241 size_t idx_rindex_surface = 0; <<
242 size_t idx_reflect = 0; <<
243 size_t idx_eff = 0; <<
244 size_t idx_trans = 0; <<
245 size_t idx_lobe = 0; <<
246 size_t idx_spike = 0; <<
247 size_t idx_back = 0; <<
248 size_t idx_rindex2 = 0; <<
249 size_t idx_groupvel = 0; <<
250 size_t idx_rrindex = 0; <<
251 size_t idx_irindex = 0; <<
252 size_t idx_coatedrindex = 0; <<
253 194
254 // Used by CoatedDielectricDielectric() << 195 G4OpticalSurfaceFinish theFinish;
255 G4bool fCoatedFrustratedTransmission = true; << 196
>> 197 G4double theReflectivity;
>> 198 G4double theEfficiency;
>> 199 G4double prob_sl, prob_ss, prob_bs;
256 200
257 G4bool fInvokeSD; <<
258 }; 201 };
259 202
260 //////////////////// 203 ////////////////////
261 // Inline methods 204 // Inline methods
262 //////////////////// 205 ////////////////////
263 206
264 inline G4bool G4OpBoundaryProcess::G4BooleanRa << 207 inline
>> 208 void G4OpBoundaryProcess::G4Swap(G4double* a, G4double* b) const
>> 209 {
>> 210 // swaps the contents of the objects pointed
>> 211 // to by 'a' and 'b'!
>> 212
>> 213 G4double temp;
>> 214
>> 215 temp = *a;
>> 216 *a = *b;
>> 217 *b = temp;
>> 218 }
>> 219
>> 220 inline
>> 221 void G4OpBoundaryProcess::G4Swap(G4Material* a, G4Material* b) const
>> 222 {
>> 223 // ONLY swaps the pointers; i.e. what used to be pointed
>> 224 // to by 'a' is now pointed to by 'b' and vice versa!
>> 225
>> 226 G4Material* temp = a;
>> 227
>> 228 a = b;
>> 229 b = temp;
>> 230 }
>> 231
>> 232 inline
>> 233 void G4OpBoundaryProcess::G4VectorSwap(G4ThreeVector* vec1,
>> 234 G4ThreeVector* vec2) const
265 { 235 {
266 // Returns a random boolean variable with th << 236 // swaps the contents of the objects pointed
>> 237 // to by 'vec1' and 'vec2'!
>> 238
>> 239 G4ThreeVector temp;
>> 240
>> 241 temp = *vec1;
>> 242 *vec1 = *vec2;
>> 243 *vec2 = temp;
>> 244 }
>> 245
>> 246 inline
>> 247 G4bool G4OpBoundaryProcess::G4BooleanRand(const G4double prob) const
>> 248 {
>> 249 /* Returns a random boolean variable with the specified probability */
>> 250
267 return (G4UniformRand() < prob); 251 return (G4UniformRand() < prob);
268 } 252 }
269 253
270 inline G4bool G4OpBoundaryProcess::IsApplicabl << 254 inline
271 const G4ParticleDefinition& aParticleType) << 255 G4ThreeVector G4OpBoundaryProcess::G4IsotropicRand() const
272 { 256 {
273 return (&aParticleType == G4OpticalPhoton::O << 257 /* Returns a random isotropic unit vector. */
>> 258
>> 259 G4ThreeVector vect;
>> 260 G4double len2;
>> 261
>> 262 do {
>> 263
>> 264 vect.setX(G4UniformRand() - 0.5);
>> 265 vect.setY(G4UniformRand() - 0.5);
>> 266 vect.setZ(G4UniformRand() - 0.5);
>> 267
>> 268 len2 = vect.mag2();
>> 269
>> 270 } while (len2 < 0.01 || len2 > 0.25);
>> 271
>> 272 return vect.unit();
274 } 273 }
275 274
276 inline G4OpBoundaryProcessStatus G4OpBoundaryP << 275 inline
>> 276 G4ThreeVector G4OpBoundaryProcess::
>> 277 G4LambertianRand(const G4ThreeVector& normal)
277 { 278 {
278 return fStatus; << 279 /* Returns a random lambertian unit vector. */
279 } << 280
280 << 281 G4ThreeVector vect;
281 inline void G4OpBoundaryProcess::ChooseReflect << 282 G4double ndotv;
282 { << 283
283 G4double rand = G4UniformRand(); << 284 do {
284 if(rand < fProb_ss) << 285 vect = G4IsotropicRand();
285 { << 286
286 fStatus = SpikeReflection; << 287 ndotv = normal * vect;
287 fFacetNormal = fGlobalNormal; << 288
288 } << 289 if (ndotv < 0.0) {
289 else if(rand < fProb_ss + fProb_sl) << 290 vect = -vect;
290 { << 291 ndotv = -ndotv;
291 fStatus = LobeReflection; <<
292 } <<
293 else if(rand < fProb_ss + fProb_sl + fProb_b <<
294 { <<
295 fStatus = BackScattering; <<
296 } <<
297 else <<
298 { <<
299 fStatus = LambertianReflection; <<
300 } <<
301 } <<
302 <<
303 inline void G4OpBoundaryProcess::DoAbsorption( <<
304 { <<
305 fStatus = Absorption; <<
306 <<
307 if(G4BooleanRand(fEfficiency)) <<
308 { <<
309 // EnergyDeposited =/= 0 means: photon has <<
310 fStatus = Detection; <<
311 aParticleChange.ProposeLocalEnergyDeposit( <<
312 } <<
313 else <<
314 { <<
315 aParticleChange.ProposeLocalEnergyDeposit( <<
316 } <<
317 <<
318 fNewMomentum = fOldMomentum; <<
319 fNewPolarization = fOldPolarization; <<
320 <<
321 aParticleChange.ProposeTrackStatus(fStopAndK <<
322 } <<
323 <<
324 inline void G4OpBoundaryProcess::DoReflection( <<
325 { <<
326 if(fStatus == LambertianReflection) <<
327 { <<
328 fNewMomentum = G4LambertianRand(fGlobalNor <<
329 fFacetNormal = (fNewMomentum - fOldMomentu <<
330 } <<
331 else if(fFinish == ground) <<
332 { <<
333 fStatus = LobeReflection; <<
334 if(!fRealRIndexMPV || !fImagRIndexMPV) <<
335 { <<
336 fFacetNormal = GetFacetNormal(fOldMoment <<
337 } 292 }
338 // else << 293
339 // complex ref. index to be implemented << 294 } while (!G4BooleanRand(ndotv));
340 fNewMomentum = << 295 return vect;
341 fOldMomentum - (2. * fOldMomentum * fFac << 296 }
342 } << 297
343 else << 298 inline
344 { << 299 G4ThreeVector G4OpBoundaryProcess::
345 fStatus = SpikeReflection; << 300 G4PlaneVectorRand(const G4ThreeVector& normal) const
346 fFacetNormal = fGlobalNormal; << 301
347 fNewMomentum = << 302 /* This function chooses a random vector within a plane given
348 fOldMomentum - (2. * fOldMomentum * fFac << 303 by the unit normal */
349 } << 304 {
350 fNewPolarization = << 305 G4ThreeVector vec1 = normal.orthogonal();
351 -fOldPolarization + (2. * fOldPolarization << 306
>> 307 G4ThreeVector vec2 = vec1.cross(normal);
>> 308
>> 309 G4double cost = 2.*G4UniformRand() - 1.0;
>> 310 G4double sint = sqrt(1.0 - cost * cost);
>> 311
>> 312 return cost * vec1 + sint * vec2;
>> 313 }
>> 314
>> 315 inline
>> 316 G4bool G4OpBoundaryProcess::IsApplicable(const G4ParticleDefinition&
>> 317 aParticleType)
>> 318 {
>> 319 return ( &aParticleType == G4OpticalPhoton::OpticalPhoton() );
>> 320 }
>> 321
>> 322 inline
>> 323 G4OpticalSurfaceModel G4OpBoundaryProcess::GetModel() const
>> 324 {
>> 325 return theModel;
>> 326 }
>> 327
>> 328 inline
>> 329 G4OpBoundaryProcessStatus G4OpBoundaryProcess::GetStatus() const
>> 330 {
>> 331 return theStatus;
>> 332 }
>> 333
>> 334 inline
>> 335 void G4OpBoundaryProcess::SetModel(G4OpticalSurfaceModel model)
>> 336 {
>> 337 theModel = model;
>> 338 }
>> 339
>> 340 inline
>> 341 void G4OpBoundaryProcess::ChooseReflection()
>> 342 {
>> 343 G4double rand = G4UniformRand();
>> 344 if ( rand >= 0.0 && rand < prob_ss ) {
>> 345 theStatus = SpikeReflection;
>> 346 theFacetNormal = theGlobalNormal;
>> 347 }
>> 348 else if ( rand >= prob_ss &&
>> 349 rand <= prob_ss+prob_sl) {
>> 350 theStatus = LobeReflection;
>> 351 }
>> 352 else if ( rand > prob_ss+prob_sl &&
>> 353 rand < prob_ss+prob_sl+prob_bs ) {
>> 354 theStatus = BackScattering;
>> 355 }
>> 356 else {
>> 357 theStatus = LambertianReflection;
>> 358 }
>> 359 }
>> 360
>> 361 inline
>> 362 void G4OpBoundaryProcess::DoAbsorption()
>> 363 {
>> 364 theStatus = Absorption;
>> 365
>> 366 if ( G4BooleanRand(theEfficiency) ) {
>> 367 // EnergyDeposited =/= 0 means: photon has been detected
>> 368 theStatus = Detection;
>> 369 aParticleChange.SetLocalEnergyDeposit(thePhotonMomentum);
>> 370 }
>> 371 else {
>> 372 aParticleChange.SetLocalEnergyDeposit(0.0);
>> 373 }
>> 374
>> 375 NewMomentum = OldMomentum;
>> 376 NewPolarization = OldPolarization;
>> 377
>> 378 // aParticleChange.SetEnergyChange(0.0);
>> 379 aParticleChange.SetStatusChange(fStopAndKill);
>> 380 }
>> 381
>> 382 inline
>> 383 void G4OpBoundaryProcess::DoReflection()
>> 384 {
>> 385 if ( theStatus == LambertianReflection ) {
>> 386
>> 387 NewMomentum = G4LambertianRand(theGlobalNormal);
>> 388 theFacetNormal = (NewMomentum - OldMomentum).unit();
>> 389
>> 390 }
>> 391 else if ( theFinish == ground ) {
>> 392
>> 393 theStatus = LobeReflection;
>> 394 theFacetNormal = GetFacetNormal(OldMomentum,theGlobalNormal);
>> 395 G4double PdotN = OldMomentum * theFacetNormal;
>> 396 NewMomentum = OldMomentum - (2.*PdotN)*theFacetNormal;
>> 397
>> 398 }
>> 399 else {
>> 400
>> 401 theStatus = SpikeReflection;
>> 402 theFacetNormal = theGlobalNormal;
>> 403 G4double PdotN = OldMomentum * theFacetNormal;
>> 404 NewMomentum = OldMomentum - (2.*PdotN)*theFacetNormal;
>> 405
>> 406 }
>> 407 G4double EdotN = OldPolarization * theFacetNormal;
>> 408 NewPolarization = -OldPolarization + (2.*EdotN)*theFacetNormal;
352 } 409 }
353 410
354 #endif /* G4OpBoundaryProcess_h */ 411 #endif /* G4OpBoundaryProcess_h */
355 412