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27 // 7 //
>> 8 // $Id: G4OpBoundaryProcess.hh,v 1.5 1999/12/15 14:53:44 gunter Exp $
>> 9 // GEANT4 tag $Name: geant4-03-01 $
28 // 10 //
>> 11 //
29 ////////////////////////////////////////////// 12 ////////////////////////////////////////////////////////////////////////
30 // Optical Photon Boundary Process Class Defin 13 // Optical Photon Boundary Process Class Definition
31 ////////////////////////////////////////////// 14 ////////////////////////////////////////////////////////////////////////
32 // 15 //
33 // File: G4OpBoundaryProcess.hh 16 // File: G4OpBoundaryProcess.hh
34 // Description: Discrete Process -- reflection 17 // Description: Discrete Process -- reflection/refraction at
35 // optical in 18 // optical interfaces
36 // Version: 1.1 19 // Version: 1.1
37 // Created: 1997-06-18 20 // Created: 1997-06-18
38 // Modified: 2005-07-28 add G4ProcessType t << 21 // Modified: 1999-10-29 add method and class descriptors
39 // 1999-10-29 add method and clas << 22 // 1999-10-10 - Fill NewMomentum/NewPolarization in
40 // 1999-10-10 - Fill NewMomentum/ <<
41 // DoAbsorption. The 23 // DoAbsorption. These members need to be
42 // filled since DoIt << 24 // filled since DoIt calls
43 // aParticleChange.S 25 // aParticleChange.SetMomentumChange etc.
44 // upon return (than 26 // 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 // 27 //
59 // Author: Peter Gumplinger 28 // Author: Peter Gumplinger
60 // adopted from work by Werner Ke 29 // adopted from work by Werner Keil - April 2/96
>> 30 // mail: gum@triumf.ca
61 // 31 //
>> 32 // CVS version tag:
62 ////////////////////////////////////////////// 33 ////////////////////////////////////////////////////////////////////////
63 34
64 #ifndef G4OpBoundaryProcess_h 35 #ifndef G4OpBoundaryProcess_h
65 #define G4OpBoundaryProcess_h 1 36 #define G4OpBoundaryProcess_h 1
66 37
67 #include "G4OpticalPhoton.hh" << 38 /////////////
68 #include "G4OpticalSurface.hh" << 39 // Includes
69 #include "G4RandomTools.hh" << 40 /////////////
>> 41
>> 42 #include "globals.hh"
>> 43 #include "templates.hh"
>> 44 #include "geomdefs.hh"
>> 45 #include "Randomize.hh"
>> 46 #include "G4Step.hh"
70 #include "G4VDiscreteProcess.hh" 47 #include "G4VDiscreteProcess.hh"
>> 48 #include "G4DynamicParticle.hh"
>> 49 #include "G4Material.hh"
>> 50 #include "G4LogicalBorderSurface.hh"
>> 51 #include "G4LogicalSkinSurface.hh"
>> 52 #include "G4OpticalSurface.hh"
>> 53 #include "G4OpticalPhoton.hh"
>> 54 #include "G4TransportationManager.hh"
71 55
72 enum G4OpBoundaryProcessStatus << 56 // Class Description:
73 { << 57 // Discrete Process -- reflection/refraction at optical interfaces.
74 Undefined, << 58 // Class inherits publicly from G4VDiscreteProcess.
75 Transmission, << 59 // Class Description - End:
76 FresnelRefraction, << 60
77 FresnelReflection, << 61 /////////////////////
78 TotalInternalReflection, << 62 // Class Definition
79 LambertianReflection, << 63 /////////////////////
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 64
119 class G4OpBoundaryProcess : public G4VDiscrete << 65 class G4OpBoundaryProcess : public G4VDiscreteProcess
120 { 66 {
121 public: <<
122 explicit G4OpBoundaryProcess(const G4String& <<
123 G4ProcessType t <<
124 virtual ~G4OpBoundaryProcess(); <<
125 67
126 virtual G4bool IsApplicable( << 68 enum G4OpBoundaryProcessStatus { Undefined,
127 const G4ParticleDefinition& aParticleType) << 69 FresnelRefraction, FresnelReflection,
128 // Returns true -> 'is applicable' only for << 70 TotalInternalReflection,
>> 71 LambertianReflection, LobeReflection,
>> 72 SpikeReflection, BackScattering,
>> 73 Absorption, Detection };
>> 74
>> 75 private:
129 76
130 virtual G4double GetMeanFreePath(const G4Tra << 77 //////////////
131 G4ForceCond << 78 // Operators
132 // Returns infinity; i. e. the process does << 79 //////////////
133 // 'Forced' condition for the DoIt to be inv <<
134 // at a boundary will any action be taken. <<
135 80
136 G4VParticleChange* PostStepDoIt(const G4Trac << 81 // G4OpBoundaryProcess& operator=(const G4OpBoundaryProcess &right);
137 const G4Step <<
138 // This is the method implementing boundary <<
139 82
140 virtual G4OpBoundaryProcessStatus GetStatus( << 83 // G4OpBoundaryProcess(const G4OpBoundaryProcess &right);
141 // Returns the current status. <<
142 84
143 virtual void SetInvokeSD(G4bool); << 85 public: // Without description
144 // Set flag for call to InvokeSD method. <<
145 86
146 virtual void PreparePhysicsTable(const G4Par << 87 ////////////////////////////////
>> 88 // Constructors and Destructor
>> 89 ////////////////////////////////
147 90
148 virtual void Initialise(); << 91 G4OpBoundaryProcess(const G4String& processName = "Boundary");
149 92
150 void SetVerboseLevel(G4int); << 93 ~G4OpBoundaryProcess();
151 94
152 private: << 95 ////////////
153 G4OpBoundaryProcess(const G4OpBoundaryProces << 96 // Methods
154 G4OpBoundaryProcess& operator=(const G4OpBou << 97 ////////////
155 98
156 G4bool G4BooleanRand(const G4double prob) co << 99 public: // With description
157 100
158 G4ThreeVector GetFacetNormal(const G4ThreeVe << 101 G4bool IsApplicable(const G4ParticleDefinition& aParticleType);
159 const G4ThreeVe << 102 // Returns true -> 'is applicable' only for an optical photon.
160 103
161 void DielectricMetal(); << 104 G4double GetMeanFreePath(const G4Track& ,
162 void DielectricDielectric(); << 105 G4double ,
>> 106 G4ForceCondition* condition);
>> 107 // Returns infinity; i. e. the process does not limit the step,
>> 108 // but sets the 'Forced' condition for the DoIt to be invoked at
>> 109 // every step. However, only at a boundary will any action be
>> 110 // taken.
163 111
164 void DielectricLUT(); << 112 G4VParticleChange* PostStepDoIt(const G4Track& aTrack,
165 void DielectricLUTDAVIS(); << 113 const G4Step& aStep);
>> 114 // This is the method implementing boundary processes.
166 115
167 void DielectricDichroic(); << 116 G4OpticalSurfaceModel GetModel() const;
168 void CoatedDielectricDielectric(); << 117 // Returns the optical surface mode.
169 118
170 void ChooseReflection(); << 119 void SetModel(G4OpticalSurfaceModel model);
171 void DoAbsorption(); << 120 // Set the optical surface model to be followed
172 void DoReflection(); << 121 // (glisur || unified).
173 122
174 G4double GetIncidentAngle(); << 123 private:
175 // Returns the incident angle of optical pho <<
176 124
177 G4double GetReflectivity(G4double E1_perp, G << 125 void G4Swap(G4double* a, G4double* b) const;
178 G4double incidentan <<
179 G4double ImaginaryR <<
180 // Returns the Reflectivity on a metallic su <<
181 126
182 G4double GetReflectivityThroughThinLayer(G4d << 127 void G4Swap(G4Material* a, G4Material* b) const;
183 G4d <<
184 G4d <<
185 // Returns the Reflectivity on a coated surf <<
186 128
187 void CalculateReflectivity(); << 129 void G4VectorSwap(G4ThreeVector* vec1, G4ThreeVector* vec2) const;
188 130
189 void BoundaryProcessVerbose() const; << 131 G4bool G4BooleanRand(const G4double prob) const;
190 132
191 // Invoke SD for post step point if the phot << 133 G4ThreeVector G4IsotropicRand() const;
192 G4bool InvokeSD(const G4Step* step); <<
193 134
194 G4ThreeVector fOldMomentum; << 135 G4ThreeVector G4LambertianRand(const G4ThreeVector& normal);
195 G4ThreeVector fOldPolarization; <<
196 136
197 G4ThreeVector fNewMomentum; << 137 G4ThreeVector G4PlaneVectorRand(const G4ThreeVector& normal) const;
198 G4ThreeVector fNewPolarization; <<
199 138
200 G4ThreeVector fGlobalNormal; << 139 G4ThreeVector GetFacetNormal(const G4ThreeVector& Momentum,
201 G4ThreeVector fFacetNormal; << 140 const G4ThreeVector& Normal) const;
202 141
203 const G4Material* fMaterial1; << 142 void DielectricMetal();
204 const G4Material* fMaterial2; << 143 void DielectricDielectric();
205 144
206 G4OpticalSurface* fOpticalSurface; << 145 void ChooseReflection();
>> 146 void DoAbsorption();
>> 147 void DoReflection();
207 148
208 G4MaterialPropertyVector* fRealRIndexMPV; << 149 private:
209 G4MaterialPropertyVector* fImagRIndexMPV; <<
210 G4Physics2DVector* fDichroicVector; <<
211 150
212 G4double fPhotonMomentum; << 151 G4double thePhotonMomentum;
213 G4double fRindex1; <<
214 G4double fRindex2; <<
215 152
216 G4double fSint1; << 153 G4ThreeVector OldMomentum;
>> 154 G4ThreeVector OldPolarization;
217 155
218 G4double fReflectivity; << 156 G4ThreeVector NewMomentum;
219 G4double fEfficiency; << 157 G4ThreeVector NewPolarization;
220 G4double fTransmittance; <<
221 G4double fSurfaceRoughness; <<
222 158
223 G4double fProb_sl, fProb_ss, fProb_bs; << 159 G4ThreeVector theGlobalNormal;
224 G4double fCarTolerance; << 160 G4ThreeVector theFacetNormal;
225 161
226 // Used by CoatedDielectricDielectric() << 162 G4Material* Material1;
227 G4double fCoatedRindex, fCoatedThickness; << 163 G4Material* Material2;
228 164
229 G4OpBoundaryProcessStatus fStatus; << 165 G4OpticalSurface* OpticalSurface;
230 G4OpticalSurfaceModel fModel; <<
231 G4OpticalSurfaceFinish fFinish; <<
232 166
233 G4int f_iTE, f_iTM; << 167 G4double Rindex1;
>> 168 G4double Rindex2;
234 169
235 G4int fNumSmallStepWarnings = 0; // number o << 170 G4double cost1, cost2, sint1, sint2;
236 G4int fNumBdryTypeWarnings = 0; // number o <<
237 171
238 size_t idx_dichroicX = 0; << 172 G4OpBoundaryProcessStatus theStatus;
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; <<
253 173
254 // Used by CoatedDielectricDielectric() << 174 G4OpticalSurfaceModel theModel;
255 G4bool fCoatedFrustratedTransmission = true; << 175
>> 176 G4OpticalSurfaceFinish theFinish;
>> 177
>> 178 G4double theReflectivity;
>> 179 G4double theEfficiency;
>> 180 G4double prob_sl, prob_ss, prob_bs;
256 181
257 G4bool fInvokeSD; <<
258 }; 182 };
259 183
260 //////////////////// 184 ////////////////////
261 // Inline methods 185 // Inline methods
262 //////////////////// 186 ////////////////////
263 187
264 inline G4bool G4OpBoundaryProcess::G4BooleanRa << 188 inline
>> 189 void G4OpBoundaryProcess::G4Swap(G4double* a, G4double* b) const
265 { 190 {
266 // Returns a random boolean variable with th << 191 // swaps the contents of the objects pointed
>> 192 // to by 'a' and 'b'!
>> 193
>> 194 G4double temp;
>> 195
>> 196 temp = *a;
>> 197 *a = *b;
>> 198 *b = temp;
>> 199 }
>> 200
>> 201 inline
>> 202 void G4OpBoundaryProcess::G4Swap(G4Material* a, G4Material* b) const
>> 203 {
>> 204 // ONLY swaps the pointers; i.e. what used to be pointed
>> 205 // to by 'a' is now pointed to by 'b' and vice versa!
>> 206
>> 207 G4Material* temp = a;
>> 208
>> 209 a = b;
>> 210 b = temp;
>> 211 }
>> 212
>> 213 inline
>> 214 void G4OpBoundaryProcess::G4VectorSwap(G4ThreeVector* vec1,
>> 215 G4ThreeVector* vec2) const
>> 216 {
>> 217 // swaps the contents of the objects pointed
>> 218 // to by 'vec1' and 'vec2'!
>> 219
>> 220 G4ThreeVector temp;
>> 221
>> 222 temp = *vec1;
>> 223 *vec1 = *vec2;
>> 224 *vec2 = temp;
>> 225 }
>> 226
>> 227 inline
>> 228 G4bool G4OpBoundaryProcess::G4BooleanRand(const G4double prob) const
>> 229 {
>> 230 /* Returns a random boolean variable with the specified probability */
>> 231
267 return (G4UniformRand() < prob); 232 return (G4UniformRand() < prob);
268 } 233 }
269 234
270 inline G4bool G4OpBoundaryProcess::IsApplicabl << 235 inline
271 const G4ParticleDefinition& aParticleType) << 236 G4ThreeVector G4OpBoundaryProcess::G4IsotropicRand() const
272 { 237 {
273 return (&aParticleType == G4OpticalPhoton::O << 238 /* Returns a random isotropic unit vector. */
>> 239
>> 240 G4ThreeVector vect;
>> 241 G4double len2;
>> 242
>> 243 do {
>> 244
>> 245 vect.setX(G4UniformRand() - 0.5);
>> 246 vect.setY(G4UniformRand() - 0.5);
>> 247 vect.setZ(G4UniformRand() - 0.5);
>> 248
>> 249 len2 = vect.mag2();
>> 250
>> 251 } while (len2 < 0.01 || len2 > 0.25);
>> 252
>> 253 return vect.unit();
274 } 254 }
275 255
276 inline G4OpBoundaryProcessStatus G4OpBoundaryP << 256 inline
>> 257 G4ThreeVector G4OpBoundaryProcess::
>> 258 G4LambertianRand(const G4ThreeVector& normal)
277 { 259 {
278 return fStatus; << 260 /* Returns a random lambertian unit vector. */
279 } << 261
280 << 262 G4ThreeVector vect;
281 inline void G4OpBoundaryProcess::ChooseReflect << 263 G4double ndotv;
282 { << 264
283 G4double rand = G4UniformRand(); << 265 do {
284 if(rand < fProb_ss) << 266 vect = G4IsotropicRand();
285 { << 267
286 fStatus = SpikeReflection; << 268 ndotv = normal * vect;
287 fFacetNormal = fGlobalNormal; << 269
288 } << 270 if (ndotv < 0.0) {
289 else if(rand < fProb_ss + fProb_sl) << 271 vect = -vect;
290 { << 272 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 } 273 }
338 // else << 274
339 // complex ref. index to be implemented << 275 } while (!G4BooleanRand(ndotv));
340 fNewMomentum = << 276 return vect;
341 fOldMomentum - (2. * fOldMomentum * fFac << 277 }
342 } << 278
343 else << 279 inline
344 { << 280 G4ThreeVector G4OpBoundaryProcess::
345 fStatus = SpikeReflection; << 281 G4PlaneVectorRand(const G4ThreeVector& normal) const
346 fFacetNormal = fGlobalNormal; << 282
347 fNewMomentum = << 283 /* This function chooses a random vector within a plane given
348 fOldMomentum - (2. * fOldMomentum * fFac << 284 by the unit normal */
349 } << 285 {
350 fNewPolarization = << 286 G4ThreeVector vec1 = normal.orthogonal();
351 -fOldPolarization + (2. * fOldPolarization << 287
>> 288 G4ThreeVector vec2 = vec1.cross(normal);
>> 289
>> 290 G4double cost = 2.*G4UniformRand() - 1.0;
>> 291 G4double sint = sqrt(1.0 - cost * cost);
>> 292
>> 293 return cost * vec1 + sint * vec2;
>> 294 }
>> 295
>> 296 inline
>> 297 G4bool G4OpBoundaryProcess::IsApplicable(const G4ParticleDefinition&
>> 298 aParticleType)
>> 299 {
>> 300 return ( &aParticleType == G4OpticalPhoton::OpticalPhoton() );
>> 301 }
>> 302
>> 303 inline
>> 304 G4OpticalSurfaceModel G4OpBoundaryProcess::GetModel() const
>> 305 {
>> 306 return theModel;
>> 307 }
>> 308
>> 309 inline
>> 310 void G4OpBoundaryProcess::SetModel(G4OpticalSurfaceModel model)
>> 311 {
>> 312 theModel = model;
>> 313 }
>> 314
>> 315 inline
>> 316 void G4OpBoundaryProcess::ChooseReflection()
>> 317 {
>> 318 G4double rand = G4UniformRand();
>> 319 if ( rand >= 0.0 && rand < prob_ss ) {
>> 320 theStatus = SpikeReflection;
>> 321 theFacetNormal = theGlobalNormal;
>> 322 }
>> 323 else if ( rand >= prob_ss &&
>> 324 rand <= prob_ss+prob_sl) {
>> 325 theStatus = LobeReflection;
>> 326 }
>> 327 else if ( rand > prob_ss+prob_sl &&
>> 328 rand < prob_ss+prob_sl+prob_bs ) {
>> 329 theStatus = BackScattering;
>> 330 }
>> 331 else {
>> 332 theStatus = LambertianReflection;
>> 333 }
>> 334 }
>> 335
>> 336 inline
>> 337 void G4OpBoundaryProcess::DoAbsorption()
>> 338 {
>> 339 theStatus = Absorption;
>> 340
>> 341 if ( G4BooleanRand(theEfficiency) ) {
>> 342 // EnergyDeposited =/= 0 means: photon has been detected
>> 343 theStatus = Detection;
>> 344 aParticleChange.SetLocalEnergyDeposit(thePhotonMomentum);
>> 345 }
>> 346 else {
>> 347 aParticleChange.SetLocalEnergyDeposit(0.0);
>> 348 }
>> 349
>> 350 NewMomentum = OldMomentum;
>> 351 NewPolarization = OldPolarization;
>> 352
>> 353 // aParticleChange.SetEnergyChange(0.0);
>> 354 aParticleChange.SetStatusChange(fStopAndKill);
>> 355 }
>> 356
>> 357 inline
>> 358 void G4OpBoundaryProcess::DoReflection()
>> 359 {
>> 360 if ( theStatus == LambertianReflection ) {
>> 361
>> 362 NewMomentum = G4LambertianRand(theGlobalNormal);
>> 363 theFacetNormal = (NewMomentum - OldMomentum).unit();
>> 364
>> 365 }
>> 366 else if ( theFinish == ground ) {
>> 367
>> 368 theStatus = LobeReflection;
>> 369 theFacetNormal = GetFacetNormal(OldMomentum,theGlobalNormal);
>> 370 G4double PdotN = OldMomentum * theFacetNormal;
>> 371 NewMomentum = OldMomentum - (2.*PdotN)*theFacetNormal;
>> 372
>> 373 }
>> 374 else {
>> 375
>> 376 theStatus = SpikeReflection;
>> 377 theFacetNormal = theGlobalNormal;
>> 378 G4double PdotN = OldMomentum * theFacetNormal;
>> 379 NewMomentum = OldMomentum - (2.*PdotN)*theFacetNormal;
>> 380
>> 381 }
>> 382 G4double EdotN = OldPolarization * theFacetNormal;
>> 383 NewPolarization = -OldPolarization + (2.*EdotN)*theFacetNormal;
352 } 384 }
353 385
354 #endif /* G4OpBoundaryProcess_h */ 386 #endif /* G4OpBoundaryProcess_h */
355 387