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26 // 23 //
>> 24 // $Id: G4OpBoundaryProcess.hh,v 1.7 2001/08/31 16:44:24 gum Exp $
>> 25 // GEANT4 tag $Name: geant4-04-00 $
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, <<
81 SpikeReflection, <<
82 BackScattering, <<
83 Absorption, <<
84 Detection, <<
85 NotAtBoundary, <<
86 SameMaterial, <<
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 80
119 class G4OpBoundaryProcess : public G4VDiscrete << 81 class G4OpBoundaryProcess : public G4VDiscreteProcess
120 { 82 {
121 public: <<
122 explicit G4OpBoundaryProcess(const G4String& <<
123 G4ProcessType t <<
124 virtual ~G4OpBoundaryProcess(); <<
125 83
126 virtual G4bool IsApplicable( << 84 enum G4OpBoundaryProcessStatus { Undefined,
127 const G4ParticleDefinition& aParticleType) << 85 FresnelRefraction, FresnelReflection,
128 // Returns true -> 'is applicable' only for << 86 TotalInternalReflection,
>> 87 LambertianReflection, LobeReflection,
>> 88 SpikeReflection, BackScattering,
>> 89 Absorption, Detection };
>> 90
>> 91 private:
>> 92
>> 93 //////////////
>> 94 // Operators
>> 95 //////////////
129 96
130 virtual G4double GetMeanFreePath(const G4Tra << 97 // G4OpBoundaryProcess& operator=(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 98
136 G4VParticleChange* PostStepDoIt(const G4Trac << 99 // G4OpBoundaryProcess(const G4OpBoundaryProcess &right);
137 const G4Step <<
138 // This is the method implementing boundary <<
139 100
140 virtual G4OpBoundaryProcessStatus GetStatus( << 101 public: // Without description
141 // Returns the current status. <<
142 102
143 virtual void SetInvokeSD(G4bool); << 103 ////////////////////////////////
144 // Set flag for call to InvokeSD method. << 104 // Constructors and Destructor
>> 105 ////////////////////////////////
145 106
146 virtual void PreparePhysicsTable(const G4Par << 107 G4OpBoundaryProcess(const G4String& processName = "OpBoundary");
147 108
148 virtual void Initialise(); << 109 ~G4OpBoundaryProcess();
149 110
150 void SetVerboseLevel(G4int); << 111 ////////////
>> 112 // Methods
>> 113 ////////////
151 114
152 private: << 115 public: // With description
153 G4OpBoundaryProcess(const G4OpBoundaryProces <<
154 G4OpBoundaryProcess& operator=(const G4OpBou <<
155 116
156 G4bool G4BooleanRand(const G4double prob) co << 117 G4bool IsApplicable(const G4ParticleDefinition& aParticleType);
>> 118 // Returns true -> 'is applicable' only for an optical photon.
157 119
158 G4ThreeVector GetFacetNormal(const G4ThreeVe << 120 G4double GetMeanFreePath(const G4Track& ,
159 const G4ThreeVe << 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.
160 127
161 void DielectricMetal(); << 128 G4VParticleChange* PostStepDoIt(const G4Track& aTrack,
162 void DielectricDielectric(); << 129 const G4Step& aStep);
>> 130 // This is the method implementing boundary processes.
163 131
164 void DielectricLUT(); << 132 G4OpticalSurfaceModel GetModel() const;
165 void DielectricLUTDAVIS(); << 133 // Returns the optical surface mode.
166 134
167 void DielectricDichroic(); << 135 void SetModel(G4OpticalSurfaceModel model);
168 void CoatedDielectricDielectric(); << 136 // Set the optical surface model to be followed
>> 137 // (glisur || unified).
169 138
170 void ChooseReflection(); << 139 private:
171 void DoAbsorption(); <<
172 void DoReflection(); <<
173 140
174 G4double GetIncidentAngle(); << 141 void G4Swap(G4double* a, G4double* b) const;
175 // Returns the incident angle of optical pho <<
176 142
177 G4double GetReflectivity(G4double E1_perp, G << 143 void G4Swap(G4Material* a, G4Material* b) const;
178 G4double incidentan <<
179 G4double ImaginaryR <<
180 // Returns the Reflectivity on a metallic su <<
181 144
182 G4double GetReflectivityThroughThinLayer(G4d << 145 void G4VectorSwap(G4ThreeVector* vec1, G4ThreeVector* vec2) const;
183 G4d <<
184 G4d <<
185 // Returns the Reflectivity on a coated surf <<
186 146
187 void CalculateReflectivity(); << 147 G4bool G4BooleanRand(const G4double prob) const;
188 148
189 void BoundaryProcessVerbose() const; << 149 G4ThreeVector G4IsotropicRand() const;
190 150
191 // Invoke SD for post step point if the phot << 151 G4ThreeVector G4LambertianRand(const G4ThreeVector& normal);
192 G4bool InvokeSD(const G4Step* step); <<
193 152
194 G4ThreeVector fOldMomentum; << 153 G4ThreeVector G4PlaneVectorRand(const G4ThreeVector& normal) const;
195 G4ThreeVector fOldPolarization; <<
196 154
197 G4ThreeVector fNewMomentum; << 155 G4ThreeVector GetFacetNormal(const G4ThreeVector& Momentum,
198 G4ThreeVector fNewPolarization; << 156 const G4ThreeVector& Normal) const;
199 157
200 G4ThreeVector fGlobalNormal; << 158 void DielectricMetal();
201 G4ThreeVector fFacetNormal; << 159 void DielectricDielectric();
202 160
203 const G4Material* fMaterial1; << 161 void ChooseReflection();
204 const G4Material* fMaterial2; << 162 void DoAbsorption();
>> 163 void DoReflection();
205 164
206 G4OpticalSurface* fOpticalSurface; << 165 private:
207 166
208 G4MaterialPropertyVector* fRealRIndexMPV; << 167 G4double thePhotonMomentum;
209 G4MaterialPropertyVector* fImagRIndexMPV; <<
210 G4Physics2DVector* fDichroicVector; <<
211 168
212 G4double fPhotonMomentum; << 169 G4ThreeVector OldMomentum;
213 G4double fRindex1; << 170 G4ThreeVector OldPolarization;
214 G4double fRindex2; <<
215 171
216 G4double fSint1; << 172 G4ThreeVector NewMomentum;
>> 173 G4ThreeVector NewPolarization;
217 174
218 G4double fReflectivity; << 175 G4ThreeVector theGlobalNormal;
219 G4double fEfficiency; << 176 G4ThreeVector theFacetNormal;
220 G4double fTransmittance; <<
221 G4double fSurfaceRoughness; <<
222 177
223 G4double fProb_sl, fProb_ss, fProb_bs; << 178 G4Material* Material1;
224 G4double fCarTolerance; << 179 G4Material* Material2;
225 180
226 // Used by CoatedDielectricDielectric() << 181 G4OpticalSurface* OpticalSurface;
227 G4double fCoatedRindex, fCoatedThickness; <<
228 182
229 G4OpBoundaryProcessStatus fStatus; << 183 G4double Rindex1;
230 G4OpticalSurfaceModel fModel; << 184 G4double Rindex2;
231 G4OpticalSurfaceFinish fFinish; <<
232 185
233 G4int f_iTE, f_iTM; << 186 G4double cost1, cost2, sint1, sint2;
234 187
235 G4int fNumSmallStepWarnings = 0; // number o << 188 G4OpBoundaryProcessStatus theStatus;
236 G4int fNumBdryTypeWarnings = 0; // number o <<
237 189
238 size_t idx_dichroicX = 0; << 190 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; <<
253 191
254 // Used by CoatedDielectricDielectric() << 192 G4OpticalSurfaceFinish theFinish;
255 G4bool fCoatedFrustratedTransmission = true; << 193
>> 194 G4double theReflectivity;
>> 195 G4double theEfficiency;
>> 196 G4double prob_sl, prob_ss, prob_bs;
256 197
257 G4bool fInvokeSD; <<
258 }; 198 };
259 199
260 //////////////////// 200 ////////////////////
261 // Inline methods 201 // Inline methods
262 //////////////////// 202 ////////////////////
263 203
264 inline G4bool G4OpBoundaryProcess::G4BooleanRa << 204 inline
>> 205 void G4OpBoundaryProcess::G4Swap(G4double* a, G4double* b) const
>> 206 {
>> 207 // swaps the contents of the objects pointed
>> 208 // to by 'a' and 'b'!
>> 209
>> 210 G4double temp;
>> 211
>> 212 temp = *a;
>> 213 *a = *b;
>> 214 *b = temp;
>> 215 }
>> 216
>> 217 inline
>> 218 void G4OpBoundaryProcess::G4Swap(G4Material* a, G4Material* b) const
>> 219 {
>> 220 // ONLY swaps the pointers; i.e. what used to be pointed
>> 221 // to by 'a' is now pointed to by 'b' and vice versa!
>> 222
>> 223 G4Material* temp = a;
>> 224
>> 225 a = b;
>> 226 b = temp;
>> 227 }
>> 228
>> 229 inline
>> 230 void G4OpBoundaryProcess::G4VectorSwap(G4ThreeVector* vec1,
>> 231 G4ThreeVector* vec2) const
265 { 232 {
266 // Returns a random boolean variable with th << 233 // swaps the contents of the objects pointed
>> 234 // to by 'vec1' and 'vec2'!
>> 235
>> 236 G4ThreeVector temp;
>> 237
>> 238 temp = *vec1;
>> 239 *vec1 = *vec2;
>> 240 *vec2 = temp;
>> 241 }
>> 242
>> 243 inline
>> 244 G4bool G4OpBoundaryProcess::G4BooleanRand(const G4double prob) const
>> 245 {
>> 246 /* Returns a random boolean variable with the specified probability */
>> 247
267 return (G4UniformRand() < prob); 248 return (G4UniformRand() < prob);
268 } 249 }
269 250
270 inline G4bool G4OpBoundaryProcess::IsApplicabl << 251 inline
271 const G4ParticleDefinition& aParticleType) << 252 G4ThreeVector G4OpBoundaryProcess::G4IsotropicRand() const
272 { 253 {
273 return (&aParticleType == G4OpticalPhoton::O << 254 /* Returns a random isotropic unit vector. */
>> 255
>> 256 G4ThreeVector vect;
>> 257 G4double len2;
>> 258
>> 259 do {
>> 260
>> 261 vect.setX(G4UniformRand() - 0.5);
>> 262 vect.setY(G4UniformRand() - 0.5);
>> 263 vect.setZ(G4UniformRand() - 0.5);
>> 264
>> 265 len2 = vect.mag2();
>> 266
>> 267 } while (len2 < 0.01 || len2 > 0.25);
>> 268
>> 269 return vect.unit();
274 } 270 }
275 271
276 inline G4OpBoundaryProcessStatus G4OpBoundaryP << 272 inline
>> 273 G4ThreeVector G4OpBoundaryProcess::
>> 274 G4LambertianRand(const G4ThreeVector& normal)
277 { 275 {
278 return fStatus; << 276 /* Returns a random lambertian unit vector. */
279 } << 277
280 << 278 G4ThreeVector vect;
281 inline void G4OpBoundaryProcess::ChooseReflect << 279 G4double ndotv;
282 { << 280
283 G4double rand = G4UniformRand(); << 281 do {
284 if(rand < fProb_ss) << 282 vect = G4IsotropicRand();
285 { << 283
286 fStatus = SpikeReflection; << 284 ndotv = normal * vect;
287 fFacetNormal = fGlobalNormal; << 285
288 } << 286 if (ndotv < 0.0) {
289 else if(rand < fProb_ss + fProb_sl) << 287 vect = -vect;
290 { << 288 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 } 289 }
338 // else << 290
339 // complex ref. index to be implemented << 291 } while (!G4BooleanRand(ndotv));
340 fNewMomentum = << 292 return vect;
341 fOldMomentum - (2. * fOldMomentum * fFac << 293 }
342 } << 294
343 else << 295 inline
344 { << 296 G4ThreeVector G4OpBoundaryProcess::
345 fStatus = SpikeReflection; << 297 G4PlaneVectorRand(const G4ThreeVector& normal) const
346 fFacetNormal = fGlobalNormal; << 298
347 fNewMomentum = << 299 /* This function chooses a random vector within a plane given
348 fOldMomentum - (2. * fOldMomentum * fFac << 300 by the unit normal */
349 } << 301 {
350 fNewPolarization = << 302 G4ThreeVector vec1 = normal.orthogonal();
351 -fOldPolarization + (2. * fOldPolarization << 303
>> 304 G4ThreeVector vec2 = vec1.cross(normal);
>> 305
>> 306 G4double cost = 2.*G4UniformRand() - 1.0;
>> 307 G4double sint = sqrt(1.0 - cost * cost);
>> 308
>> 309 return cost * vec1 + sint * vec2;
>> 310 }
>> 311
>> 312 inline
>> 313 G4bool G4OpBoundaryProcess::IsApplicable(const G4ParticleDefinition&
>> 314 aParticleType)
>> 315 {
>> 316 return ( &aParticleType == G4OpticalPhoton::OpticalPhoton() );
>> 317 }
>> 318
>> 319 inline
>> 320 G4OpticalSurfaceModel G4OpBoundaryProcess::GetModel() const
>> 321 {
>> 322 return theModel;
>> 323 }
>> 324
>> 325 inline
>> 326 void G4OpBoundaryProcess::SetModel(G4OpticalSurfaceModel model)
>> 327 {
>> 328 theModel = model;
>> 329 }
>> 330
>> 331 inline
>> 332 void G4OpBoundaryProcess::ChooseReflection()
>> 333 {
>> 334 G4double rand = G4UniformRand();
>> 335 if ( rand >= 0.0 && rand < prob_ss ) {
>> 336 theStatus = SpikeReflection;
>> 337 theFacetNormal = theGlobalNormal;
>> 338 }
>> 339 else if ( rand >= prob_ss &&
>> 340 rand <= prob_ss+prob_sl) {
>> 341 theStatus = LobeReflection;
>> 342 }
>> 343 else if ( rand > prob_ss+prob_sl &&
>> 344 rand < prob_ss+prob_sl+prob_bs ) {
>> 345 theStatus = BackScattering;
>> 346 }
>> 347 else {
>> 348 theStatus = LambertianReflection;
>> 349 }
>> 350 }
>> 351
>> 352 inline
>> 353 void G4OpBoundaryProcess::DoAbsorption()
>> 354 {
>> 355 theStatus = Absorption;
>> 356
>> 357 if ( G4BooleanRand(theEfficiency) ) {
>> 358 // EnergyDeposited =/= 0 means: photon has been detected
>> 359 theStatus = Detection;
>> 360 aParticleChange.SetLocalEnergyDeposit(thePhotonMomentum);
>> 361 }
>> 362 else {
>> 363 aParticleChange.SetLocalEnergyDeposit(0.0);
>> 364 }
>> 365
>> 366 NewMomentum = OldMomentum;
>> 367 NewPolarization = OldPolarization;
>> 368
>> 369 // aParticleChange.SetEnergyChange(0.0);
>> 370 aParticleChange.SetStatusChange(fStopAndKill);
>> 371 }
>> 372
>> 373 inline
>> 374 void G4OpBoundaryProcess::DoReflection()
>> 375 {
>> 376 if ( theStatus == LambertianReflection ) {
>> 377
>> 378 NewMomentum = G4LambertianRand(theGlobalNormal);
>> 379 theFacetNormal = (NewMomentum - OldMomentum).unit();
>> 380
>> 381 }
>> 382 else if ( theFinish == ground ) {
>> 383
>> 384 theStatus = LobeReflection;
>> 385 theFacetNormal = GetFacetNormal(OldMomentum,theGlobalNormal);
>> 386 G4double PdotN = OldMomentum * theFacetNormal;
>> 387 NewMomentum = OldMomentum - (2.*PdotN)*theFacetNormal;
>> 388
>> 389 }
>> 390 else {
>> 391
>> 392 theStatus = SpikeReflection;
>> 393 theFacetNormal = theGlobalNormal;
>> 394 G4double PdotN = OldMomentum * theFacetNormal;
>> 395 NewMomentum = OldMomentum - (2.*PdotN)*theFacetNormal;
>> 396
>> 397 }
>> 398 G4double EdotN = OldPolarization * theFacetNormal;
>> 399 NewPolarization = -OldPolarization + (2.*EdotN)*theFacetNormal;
352 } 400 }
353 401
354 #endif /* G4OpBoundaryProcess_h */ 402 #endif /* G4OpBoundaryProcess_h */
355 403