1 | // |
---|
2 | // ******************************************************************** |
---|
3 | // * License and Disclaimer * |
---|
4 | // * * |
---|
5 | // * The Geant4 software is copyright of the Copyright Holders of * |
---|
6 | // * the Geant4 Collaboration. It is provided under the terms and * |
---|
7 | // * conditions of the Geant4 Software License, included in the file * |
---|
8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
---|
9 | // * include a list of copyright holders. * |
---|
10 | // * * |
---|
11 | // * Neither the authors of this software system, nor their employing * |
---|
12 | // * institutes,nor the agencies providing financial support for this * |
---|
13 | // * work make any representation or warranty, express or implied, * |
---|
14 | // * regarding this software system or assume any liability for its * |
---|
15 | // * use. Please see the license in the file LICENSE and URL above * |
---|
16 | // * for the full disclaimer and the limitation of liability. * |
---|
17 | // * * |
---|
18 | // * This code implementation is the result of the scientific and * |
---|
19 | // * technical work of the GEANT4 collaboration. * |
---|
20 | // * By using, copying, modifying or distributing the software (or * |
---|
21 | // * any work based on the software) you agree to acknowledge its * |
---|
22 | // * use in resulting scientific publications, and indicate your * |
---|
23 | // * acceptance of all terms of the Geant4 Software license. * |
---|
24 | // ******************************************************************** |
---|
25 | // |
---|
26 | //////////////////////////////////////////////////////////////////////// |
---|
27 | // Optical Photon Boundary Process Class Implementation |
---|
28 | //////////////////////////////////////////////////////////////////////// |
---|
29 | // |
---|
30 | // File: G4OpBoundaryProcess.cc |
---|
31 | // Description: Discrete Process -- reflection/refraction at |
---|
32 | // optical interfaces |
---|
33 | // Version: 1.1 |
---|
34 | // Created: 1997-06-18 |
---|
35 | // Modified: 1998-05-25 - Correct parallel component of polarization |
---|
36 | // (thanks to: Stefano Magni + Giovanni Pieri) |
---|
37 | // 1998-05-28 - NULL Rindex pointer before reuse |
---|
38 | // (thanks to: Stefano Magni) |
---|
39 | // 1998-06-11 - delete *sint1 in oblique reflection |
---|
40 | // (thanks to: Giovanni Pieri) |
---|
41 | // 1998-06-19 - move from GetLocalExitNormal() to the new |
---|
42 | // method: GetLocalExitNormal(&valid) to get |
---|
43 | // the surface normal in all cases |
---|
44 | // 1998-11-07 - NULL OpticalSurface pointer before use |
---|
45 | // comparison not sharp for: std::abs(cost1) < 1.0 |
---|
46 | // remove sin1, sin2 in lines 556,567 |
---|
47 | // (thanks to Stefano Magni) |
---|
48 | // 1999-10-10 - Accommodate changes done in DoAbsorption by |
---|
49 | // changing logic in DielectricMetal |
---|
50 | // 2001-10-18 - avoid Linux (gcc-2.95.2) warning about variables |
---|
51 | // might be used uninitialized in this function |
---|
52 | // moved E2_perp, E2_parl and E2_total out of 'if' |
---|
53 | // 2003-11-27 - Modified line 168-9 to reflect changes made to |
---|
54 | // G4OpticalSurface class ( by Fan Lei) |
---|
55 | // 2004-02-02 - Set theStatus = Undefined at start of DoIt |
---|
56 | // 2005-07-28 - add G4ProcessType to constructor |
---|
57 | // 2006-11-04 - add capability of calculating the reflectivity |
---|
58 | // off a metal surface by way of a complex index |
---|
59 | // of refraction - Thanks to Sehwook Lee and John |
---|
60 | // Hauptman (Dept. of Physics - Iowa State Univ.) |
---|
61 | // 2009-11-10 - add capability of simulating surface reflections |
---|
62 | // with Look-Up-Tables (LUT) containing measured |
---|
63 | // optical reflectance for a variety of surface |
---|
64 | // treatments - Thanks to Martin Janecek and |
---|
65 | // William Moses (Lawrence Berkeley National Lab.) |
---|
66 | // |
---|
67 | // Author: Peter Gumplinger |
---|
68 | // adopted from work by Werner Keil - April 2/96 |
---|
69 | // mail: gum@triumf.ca |
---|
70 | // |
---|
71 | //////////////////////////////////////////////////////////////////////// |
---|
72 | |
---|
73 | #include "G4ios.hh" |
---|
74 | #include "G4OpProcessSubType.hh" |
---|
75 | |
---|
76 | #include "G4OpBoundaryProcess.hh" |
---|
77 | #include "G4GeometryTolerance.hh" |
---|
78 | |
---|
79 | ///////////////////////// |
---|
80 | // Class Implementation |
---|
81 | ///////////////////////// |
---|
82 | |
---|
83 | ////////////// |
---|
84 | // Operators |
---|
85 | ////////////// |
---|
86 | |
---|
87 | // G4OpBoundaryProcess::operator=(const G4OpBoundaryProcess &right) |
---|
88 | // { |
---|
89 | // } |
---|
90 | |
---|
91 | ///////////////// |
---|
92 | // Constructors |
---|
93 | ///////////////// |
---|
94 | |
---|
95 | G4OpBoundaryProcess::G4OpBoundaryProcess(const G4String& processName, |
---|
96 | G4ProcessType type) |
---|
97 | : G4VDiscreteProcess(processName, type) |
---|
98 | { |
---|
99 | if ( verboseLevel > 0) { |
---|
100 | G4cout << GetProcessName() << " is created " << G4endl; |
---|
101 | } |
---|
102 | |
---|
103 | SetProcessSubType(fOpBoundary); |
---|
104 | |
---|
105 | theStatus = Undefined; |
---|
106 | theModel = glisur; |
---|
107 | theFinish = polished; |
---|
108 | theReflectivity = 1.; |
---|
109 | theEfficiency = 0.; |
---|
110 | |
---|
111 | prob_sl = 0.; |
---|
112 | prob_ss = 0.; |
---|
113 | prob_bs = 0.; |
---|
114 | |
---|
115 | PropertyPointer = NULL; |
---|
116 | PropertyPointer1 = NULL; |
---|
117 | PropertyPointer2 = NULL; |
---|
118 | |
---|
119 | kCarTolerance = G4GeometryTolerance::GetInstance() |
---|
120 | ->GetSurfaceTolerance(); |
---|
121 | |
---|
122 | } |
---|
123 | |
---|
124 | // G4OpBoundaryProcess::G4OpBoundaryProcess(const G4OpBoundaryProcess &right) |
---|
125 | // { |
---|
126 | // } |
---|
127 | |
---|
128 | //////////////// |
---|
129 | // Destructors |
---|
130 | //////////////// |
---|
131 | |
---|
132 | G4OpBoundaryProcess::~G4OpBoundaryProcess(){} |
---|
133 | |
---|
134 | //////////// |
---|
135 | // Methods |
---|
136 | //////////// |
---|
137 | |
---|
138 | // PostStepDoIt |
---|
139 | // ------------ |
---|
140 | // |
---|
141 | G4VParticleChange* |
---|
142 | G4OpBoundaryProcess::PostStepDoIt(const G4Track& aTrack, const G4Step& aStep) |
---|
143 | { |
---|
144 | theStatus = Undefined; |
---|
145 | |
---|
146 | aParticleChange.Initialize(aTrack); |
---|
147 | |
---|
148 | G4StepPoint* pPreStepPoint = aStep.GetPreStepPoint(); |
---|
149 | G4StepPoint* pPostStepPoint = aStep.GetPostStepPoint(); |
---|
150 | |
---|
151 | if ( verboseLevel > 0 ) { |
---|
152 | G4cout << " Photon at Boundary! " << G4endl; |
---|
153 | G4VPhysicalVolume* thePrePV = pPreStepPoint->GetPhysicalVolume(); |
---|
154 | G4VPhysicalVolume* thePostPV = pPostStepPoint->GetPhysicalVolume(); |
---|
155 | if (thePrePV) G4cout << " thePrePV: " << thePrePV->GetName() << G4endl; |
---|
156 | if (thePostPV) G4cout << " thePostPV: " << thePostPV->GetName() << G4endl; |
---|
157 | } |
---|
158 | |
---|
159 | if (pPostStepPoint->GetStepStatus() != fGeomBoundary){ |
---|
160 | theStatus = NotAtBoundary; |
---|
161 | if ( verboseLevel > 0) BoundaryProcessVerbose(); |
---|
162 | return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep); |
---|
163 | } |
---|
164 | if (aTrack.GetStepLength()<=kCarTolerance/2){ |
---|
165 | theStatus = StepTooSmall; |
---|
166 | if ( verboseLevel > 0) BoundaryProcessVerbose(); |
---|
167 | return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep); |
---|
168 | } |
---|
169 | |
---|
170 | Material1 = pPreStepPoint -> GetMaterial(); |
---|
171 | Material2 = pPostStepPoint -> GetMaterial(); |
---|
172 | |
---|
173 | const G4DynamicParticle* aParticle = aTrack.GetDynamicParticle(); |
---|
174 | |
---|
175 | thePhotonMomentum = aParticle->GetTotalMomentum(); |
---|
176 | OldMomentum = aParticle->GetMomentumDirection(); |
---|
177 | OldPolarization = aParticle->GetPolarization(); |
---|
178 | |
---|
179 | if ( verboseLevel > 0 ) { |
---|
180 | G4cout << " Old Momentum Direction: " << OldMomentum << G4endl; |
---|
181 | G4cout << " Old Polarization: " << OldPolarization << G4endl; |
---|
182 | } |
---|
183 | |
---|
184 | G4ThreeVector theGlobalPoint = pPostStepPoint->GetPosition(); |
---|
185 | |
---|
186 | G4Navigator* theNavigator = |
---|
187 | G4TransportationManager::GetTransportationManager()-> |
---|
188 | GetNavigatorForTracking(); |
---|
189 | |
---|
190 | G4ThreeVector theLocalPoint = theNavigator-> |
---|
191 | GetGlobalToLocalTransform(). |
---|
192 | TransformPoint(theGlobalPoint); |
---|
193 | |
---|
194 | G4ThreeVector theLocalNormal; // Normal points back into volume |
---|
195 | |
---|
196 | G4bool valid; |
---|
197 | theLocalNormal = theNavigator->GetLocalExitNormal(&valid); |
---|
198 | |
---|
199 | if (valid) { |
---|
200 | theLocalNormal = -theLocalNormal; |
---|
201 | } |
---|
202 | else { |
---|
203 | G4cerr << " G4OpBoundaryProcess/PostStepDoIt(): " |
---|
204 | << " The Navigator reports that it returned an invalid normal" |
---|
205 | << G4endl; |
---|
206 | G4Exception("G4OpBoundaryProcess::PostStepDoIt", |
---|
207 | "Invalid Surface Normal", |
---|
208 | EventMustBeAborted, |
---|
209 | "Geometry must return valid surface normal"); |
---|
210 | } |
---|
211 | |
---|
212 | theGlobalNormal = theNavigator->GetLocalToGlobalTransform(). |
---|
213 | TransformAxis(theLocalNormal); |
---|
214 | |
---|
215 | if (OldMomentum * theGlobalNormal > 0.0) { |
---|
216 | #ifdef G4DEBUG_OPTICAL |
---|
217 | G4cerr << " G4OpBoundaryProcess/PostStepDoIt(): " |
---|
218 | << " theGlobalNormal points the wrong direction " |
---|
219 | << G4endl; |
---|
220 | #endif |
---|
221 | theGlobalNormal = -theGlobalNormal; |
---|
222 | } |
---|
223 | |
---|
224 | G4MaterialPropertiesTable* aMaterialPropertiesTable; |
---|
225 | G4MaterialPropertyVector* Rindex; |
---|
226 | |
---|
227 | aMaterialPropertiesTable = Material1->GetMaterialPropertiesTable(); |
---|
228 | if (aMaterialPropertiesTable) { |
---|
229 | Rindex = aMaterialPropertiesTable->GetProperty("RINDEX"); |
---|
230 | } |
---|
231 | else { |
---|
232 | theStatus = NoRINDEX; |
---|
233 | if ( verboseLevel > 0) BoundaryProcessVerbose(); |
---|
234 | aParticleChange.ProposeTrackStatus(fStopAndKill); |
---|
235 | return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep); |
---|
236 | } |
---|
237 | |
---|
238 | if (Rindex) { |
---|
239 | Rindex1 = Rindex->GetProperty(thePhotonMomentum); |
---|
240 | } |
---|
241 | else { |
---|
242 | theStatus = NoRINDEX; |
---|
243 | if ( verboseLevel > 0) BoundaryProcessVerbose(); |
---|
244 | aParticleChange.ProposeTrackStatus(fStopAndKill); |
---|
245 | return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep); |
---|
246 | } |
---|
247 | |
---|
248 | theReflectivity = 1.; |
---|
249 | theEfficiency = 0.; |
---|
250 | |
---|
251 | theModel = glisur; |
---|
252 | theFinish = polished; |
---|
253 | |
---|
254 | G4SurfaceType type = dielectric_dielectric; |
---|
255 | |
---|
256 | Rindex = NULL; |
---|
257 | OpticalSurface = NULL; |
---|
258 | |
---|
259 | G4LogicalSurface* Surface = NULL; |
---|
260 | |
---|
261 | Surface = G4LogicalBorderSurface::GetSurface |
---|
262 | (pPreStepPoint ->GetPhysicalVolume(), |
---|
263 | pPostStepPoint->GetPhysicalVolume()); |
---|
264 | |
---|
265 | if (Surface == NULL){ |
---|
266 | G4bool enteredDaughter=(pPostStepPoint->GetPhysicalVolume() |
---|
267 | ->GetMotherLogical() == |
---|
268 | pPreStepPoint->GetPhysicalVolume() |
---|
269 | ->GetLogicalVolume()); |
---|
270 | if(enteredDaughter){ |
---|
271 | Surface = G4LogicalSkinSurface::GetSurface |
---|
272 | (pPostStepPoint->GetPhysicalVolume()-> |
---|
273 | GetLogicalVolume()); |
---|
274 | if(Surface == NULL) |
---|
275 | Surface = G4LogicalSkinSurface::GetSurface |
---|
276 | (pPreStepPoint->GetPhysicalVolume()-> |
---|
277 | GetLogicalVolume()); |
---|
278 | } |
---|
279 | else { |
---|
280 | Surface = G4LogicalSkinSurface::GetSurface |
---|
281 | (pPreStepPoint->GetPhysicalVolume()-> |
---|
282 | GetLogicalVolume()); |
---|
283 | if(Surface == NULL) |
---|
284 | Surface = G4LogicalSkinSurface::GetSurface |
---|
285 | (pPostStepPoint->GetPhysicalVolume()-> |
---|
286 | GetLogicalVolume()); |
---|
287 | } |
---|
288 | } |
---|
289 | |
---|
290 | if (Surface) OpticalSurface = |
---|
291 | dynamic_cast <G4OpticalSurface*> (Surface->GetSurfaceProperty()); |
---|
292 | |
---|
293 | if (OpticalSurface) { |
---|
294 | |
---|
295 | type = OpticalSurface->GetType(); |
---|
296 | theModel = OpticalSurface->GetModel(); |
---|
297 | theFinish = OpticalSurface->GetFinish(); |
---|
298 | |
---|
299 | aMaterialPropertiesTable = OpticalSurface-> |
---|
300 | GetMaterialPropertiesTable(); |
---|
301 | |
---|
302 | if (aMaterialPropertiesTable) { |
---|
303 | |
---|
304 | if (theFinish == polishedbackpainted || |
---|
305 | theFinish == groundbackpainted ) { |
---|
306 | Rindex = aMaterialPropertiesTable->GetProperty("RINDEX"); |
---|
307 | if (Rindex) { |
---|
308 | Rindex2 = Rindex->GetProperty(thePhotonMomentum); |
---|
309 | } |
---|
310 | else { |
---|
311 | theStatus = NoRINDEX; |
---|
312 | if ( verboseLevel > 0) BoundaryProcessVerbose(); |
---|
313 | aParticleChange.ProposeTrackStatus(fStopAndKill); |
---|
314 | return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep); |
---|
315 | } |
---|
316 | } |
---|
317 | |
---|
318 | PropertyPointer = |
---|
319 | aMaterialPropertiesTable->GetProperty("REFLECTIVITY"); |
---|
320 | PropertyPointer1 = |
---|
321 | aMaterialPropertiesTable->GetProperty("REALRINDEX"); |
---|
322 | PropertyPointer2 = |
---|
323 | aMaterialPropertiesTable->GetProperty("IMAGINARYRINDEX"); |
---|
324 | |
---|
325 | iTE = 1; |
---|
326 | iTM = 1; |
---|
327 | |
---|
328 | if (PropertyPointer) { |
---|
329 | |
---|
330 | theReflectivity = |
---|
331 | PropertyPointer->GetProperty(thePhotonMomentum); |
---|
332 | |
---|
333 | } else if (PropertyPointer1 && PropertyPointer2) { |
---|
334 | |
---|
335 | CalculateReflectivity(); |
---|
336 | |
---|
337 | } |
---|
338 | |
---|
339 | PropertyPointer = |
---|
340 | aMaterialPropertiesTable->GetProperty("EFFICIENCY"); |
---|
341 | if (PropertyPointer) { |
---|
342 | theEfficiency = |
---|
343 | PropertyPointer->GetProperty(thePhotonMomentum); |
---|
344 | } |
---|
345 | |
---|
346 | if ( theModel == unified ) { |
---|
347 | PropertyPointer = |
---|
348 | aMaterialPropertiesTable->GetProperty("SPECULARLOBECONSTANT"); |
---|
349 | if (PropertyPointer) { |
---|
350 | prob_sl = |
---|
351 | PropertyPointer->GetProperty(thePhotonMomentum); |
---|
352 | } else { |
---|
353 | prob_sl = 0.0; |
---|
354 | } |
---|
355 | |
---|
356 | PropertyPointer = |
---|
357 | aMaterialPropertiesTable->GetProperty("SPECULARSPIKECONSTANT"); |
---|
358 | if (PropertyPointer) { |
---|
359 | prob_ss = |
---|
360 | PropertyPointer->GetProperty(thePhotonMomentum); |
---|
361 | } else { |
---|
362 | prob_ss = 0.0; |
---|
363 | } |
---|
364 | |
---|
365 | PropertyPointer = |
---|
366 | aMaterialPropertiesTable->GetProperty("BACKSCATTERCONSTANT"); |
---|
367 | if (PropertyPointer) { |
---|
368 | prob_bs = |
---|
369 | PropertyPointer->GetProperty(thePhotonMomentum); |
---|
370 | } else { |
---|
371 | prob_bs = 0.0; |
---|
372 | } |
---|
373 | } |
---|
374 | } |
---|
375 | else if (theFinish == polishedbackpainted || |
---|
376 | theFinish == groundbackpainted ) { |
---|
377 | aParticleChange.ProposeTrackStatus(fStopAndKill); |
---|
378 | return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep); |
---|
379 | } |
---|
380 | } |
---|
381 | |
---|
382 | if (type == dielectric_dielectric ) { |
---|
383 | if (theFinish == polished || theFinish == ground ) { |
---|
384 | |
---|
385 | if (Material1 == Material2){ |
---|
386 | theStatus = SameMaterial; |
---|
387 | if ( verboseLevel > 0) BoundaryProcessVerbose(); |
---|
388 | return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep); |
---|
389 | } |
---|
390 | aMaterialPropertiesTable = |
---|
391 | Material2->GetMaterialPropertiesTable(); |
---|
392 | if (aMaterialPropertiesTable) |
---|
393 | Rindex = aMaterialPropertiesTable->GetProperty("RINDEX"); |
---|
394 | if (Rindex) { |
---|
395 | Rindex2 = Rindex->GetProperty(thePhotonMomentum); |
---|
396 | } |
---|
397 | else { |
---|
398 | theStatus = NoRINDEX; |
---|
399 | if ( verboseLevel > 0) BoundaryProcessVerbose(); |
---|
400 | aParticleChange.ProposeTrackStatus(fStopAndKill); |
---|
401 | return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep); |
---|
402 | } |
---|
403 | } |
---|
404 | } |
---|
405 | |
---|
406 | if (type == dielectric_metal) { |
---|
407 | |
---|
408 | DielectricMetal(); |
---|
409 | |
---|
410 | // Uncomment the following lines if you wish to have |
---|
411 | // Transmission instead of Absorption |
---|
412 | // if (theStatus == Absorption) { |
---|
413 | // return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep); |
---|
414 | // } |
---|
415 | |
---|
416 | } |
---|
417 | else if (type == dielectric_LUT) { |
---|
418 | |
---|
419 | DielectricLUT(); |
---|
420 | |
---|
421 | } |
---|
422 | else if (type == dielectric_dielectric) { |
---|
423 | |
---|
424 | if ( theFinish == polishedbackpainted || |
---|
425 | theFinish == groundbackpainted ) { |
---|
426 | DielectricDielectric(); |
---|
427 | } |
---|
428 | else { |
---|
429 | if ( !G4BooleanRand(theReflectivity) ) { |
---|
430 | DoAbsorption(); |
---|
431 | } |
---|
432 | else { |
---|
433 | if ( theFinish == polishedfrontpainted ) { |
---|
434 | DoReflection(); |
---|
435 | } |
---|
436 | else if ( theFinish == groundfrontpainted ) { |
---|
437 | theStatus = LambertianReflection; |
---|
438 | DoReflection(); |
---|
439 | } |
---|
440 | else { |
---|
441 | DielectricDielectric(); |
---|
442 | } |
---|
443 | } |
---|
444 | } |
---|
445 | } |
---|
446 | else { |
---|
447 | |
---|
448 | G4cerr << " Error: G4BoundaryProcess: illegal boundary type " << G4endl; |
---|
449 | return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep); |
---|
450 | |
---|
451 | } |
---|
452 | |
---|
453 | NewMomentum = NewMomentum.unit(); |
---|
454 | NewPolarization = NewPolarization.unit(); |
---|
455 | |
---|
456 | if ( verboseLevel > 0) { |
---|
457 | G4cout << " New Momentum Direction: " << NewMomentum << G4endl; |
---|
458 | G4cout << " New Polarization: " << NewPolarization << G4endl; |
---|
459 | BoundaryProcessVerbose(); |
---|
460 | } |
---|
461 | |
---|
462 | aParticleChange.ProposeMomentumDirection(NewMomentum); |
---|
463 | aParticleChange.ProposePolarization(NewPolarization); |
---|
464 | |
---|
465 | return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep); |
---|
466 | } |
---|
467 | |
---|
468 | void G4OpBoundaryProcess::BoundaryProcessVerbose() const |
---|
469 | { |
---|
470 | if ( theStatus == Undefined ) |
---|
471 | G4cout << " *** Undefined *** " << G4endl; |
---|
472 | if ( theStatus == FresnelRefraction ) |
---|
473 | G4cout << " *** FresnelRefraction *** " << G4endl; |
---|
474 | if ( theStatus == FresnelReflection ) |
---|
475 | G4cout << " *** FresnelReflection *** " << G4endl; |
---|
476 | if ( theStatus == TotalInternalReflection ) |
---|
477 | G4cout << " *** TotalInternalReflection *** " << G4endl; |
---|
478 | if ( theStatus == LambertianReflection ) |
---|
479 | G4cout << " *** LambertianReflection *** " << G4endl; |
---|
480 | if ( theStatus == LobeReflection ) |
---|
481 | G4cout << " *** LobeReflection *** " << G4endl; |
---|
482 | if ( theStatus == SpikeReflection ) |
---|
483 | G4cout << " *** SpikeReflection *** " << G4endl; |
---|
484 | if ( theStatus == BackScattering ) |
---|
485 | G4cout << " *** BackScattering *** " << G4endl; |
---|
486 | if ( theStatus == PolishedLumirrorAirReflection ) |
---|
487 | G4cout << " *** PolishedLumirrorAirReflection *** " << G4endl; |
---|
488 | if ( theStatus == PolishedLumirrorGlueReflection ) |
---|
489 | G4cout << " *** PolishedLumirrorGlueReflection *** " << G4endl; |
---|
490 | if ( theStatus == PolishedAirReflection ) |
---|
491 | G4cout << " *** PolishedAirReflection *** " << G4endl; |
---|
492 | if ( theStatus == PolishedTeflonAirReflection ) |
---|
493 | G4cout << " *** PolishedTeflonAirReflection *** " << G4endl; |
---|
494 | if ( theStatus == PolishedTiOAirReflection ) |
---|
495 | G4cout << " *** PolishedTiOAirReflection *** " << G4endl; |
---|
496 | if ( theStatus == PolishedTyvekAirReflection ) |
---|
497 | G4cout << " *** PolishedTyvekAirReflection *** " << G4endl; |
---|
498 | if ( theStatus == PolishedVM2000AirReflection ) |
---|
499 | G4cout << " *** PolishedVM2000AirReflection *** " << G4endl; |
---|
500 | if ( theStatus == PolishedVM2000GlueReflection ) |
---|
501 | G4cout << " *** PolishedVM2000GlueReflection *** " << G4endl; |
---|
502 | if ( theStatus == EtchedLumirrorAirReflection ) |
---|
503 | G4cout << " *** EtchedLumirrorAirReflection *** " << G4endl; |
---|
504 | if ( theStatus == EtchedLumirrorGlueReflection ) |
---|
505 | G4cout << " *** EtchedLumirrorGlueReflection *** " << G4endl; |
---|
506 | if ( theStatus == EtchedAirReflection ) |
---|
507 | G4cout << " *** EtchedAirReflection *** " << G4endl; |
---|
508 | if ( theStatus == EtchedTeflonAirReflection ) |
---|
509 | G4cout << " *** EtchedTeflonAirReflection *** " << G4endl; |
---|
510 | if ( theStatus == EtchedTiOAirReflection ) |
---|
511 | G4cout << " *** EtchedTiOAirReflection *** " << G4endl; |
---|
512 | if ( theStatus == EtchedTyvekAirReflection ) |
---|
513 | G4cout << " *** EtchedTyvekAirReflection *** " << G4endl; |
---|
514 | if ( theStatus == EtchedVM2000AirReflection ) |
---|
515 | G4cout << " *** EtchedVM2000AirReflection *** " << G4endl; |
---|
516 | if ( theStatus == EtchedVM2000GlueReflection ) |
---|
517 | G4cout << " *** EtchedVM2000GlueReflection *** " << G4endl; |
---|
518 | if ( theStatus == GroundLumirrorAirReflection ) |
---|
519 | G4cout << " *** GroundLumirrorAirReflection *** " << G4endl; |
---|
520 | if ( theStatus == GroundLumirrorGlueReflection ) |
---|
521 | G4cout << " *** GroundLumirrorGlueReflection *** " << G4endl; |
---|
522 | if ( theStatus == GroundAirReflection ) |
---|
523 | G4cout << " *** GroundAirReflection *** " << G4endl; |
---|
524 | if ( theStatus == GroundTeflonAirReflection ) |
---|
525 | G4cout << " *** GroundTeflonAirReflection *** " << G4endl; |
---|
526 | if ( theStatus == GroundTiOAirReflection ) |
---|
527 | G4cout << " *** GroundTiOAirReflection *** " << G4endl; |
---|
528 | if ( theStatus == GroundTyvekAirReflection ) |
---|
529 | G4cout << " *** GroundTyvekAirReflection *** " << G4endl; |
---|
530 | if ( theStatus == GroundVM2000AirReflection ) |
---|
531 | G4cout << " *** GroundVM2000AirReflection *** " << G4endl; |
---|
532 | if ( theStatus == GroundVM2000GlueReflection ) |
---|
533 | G4cout << " *** GroundVM2000GlueReflection *** " << G4endl; |
---|
534 | if ( theStatus == Absorption ) |
---|
535 | G4cout << " *** Absorption *** " << G4endl; |
---|
536 | if ( theStatus == Detection ) |
---|
537 | G4cout << " *** Detection *** " << G4endl; |
---|
538 | if ( theStatus == NotAtBoundary ) |
---|
539 | G4cout << " *** NotAtBoundary *** " << G4endl; |
---|
540 | if ( theStatus == SameMaterial ) |
---|
541 | G4cout << " *** SameMaterial *** " << G4endl; |
---|
542 | if ( theStatus == StepTooSmall ) |
---|
543 | G4cout << " *** StepTooSmall *** " << G4endl; |
---|
544 | if ( theStatus == NoRINDEX ) |
---|
545 | G4cout << " *** NoRINDEX *** " << G4endl; |
---|
546 | } |
---|
547 | |
---|
548 | G4ThreeVector |
---|
549 | G4OpBoundaryProcess::GetFacetNormal(const G4ThreeVector& Momentum, |
---|
550 | const G4ThreeVector& Normal ) const |
---|
551 | { |
---|
552 | G4ThreeVector FacetNormal; |
---|
553 | |
---|
554 | if (theModel == unified || theModel == LUT) { |
---|
555 | |
---|
556 | /* This function code alpha to a random value taken from the |
---|
557 | distribution p(alpha) = g(alpha; 0, sigma_alpha)*std::sin(alpha), |
---|
558 | for alpha > 0 and alpha < 90, where g(alpha; 0, sigma_alpha) |
---|
559 | is a gaussian distribution with mean 0 and standard deviation |
---|
560 | sigma_alpha. */ |
---|
561 | |
---|
562 | G4double alpha; |
---|
563 | |
---|
564 | G4double sigma_alpha = 0.0; |
---|
565 | if (OpticalSurface) sigma_alpha = OpticalSurface->GetSigmaAlpha(); |
---|
566 | |
---|
567 | G4double f_max = std::min(1.0,4.*sigma_alpha); |
---|
568 | |
---|
569 | do { |
---|
570 | do { |
---|
571 | alpha = G4RandGauss::shoot(0.0,sigma_alpha); |
---|
572 | } while (G4UniformRand()*f_max > std::sin(alpha) || alpha >= halfpi ); |
---|
573 | |
---|
574 | G4double phi = G4UniformRand()*twopi; |
---|
575 | |
---|
576 | G4double SinAlpha = std::sin(alpha); |
---|
577 | G4double CosAlpha = std::cos(alpha); |
---|
578 | G4double SinPhi = std::sin(phi); |
---|
579 | G4double CosPhi = std::cos(phi); |
---|
580 | |
---|
581 | G4double unit_x = SinAlpha * CosPhi; |
---|
582 | G4double unit_y = SinAlpha * SinPhi; |
---|
583 | G4double unit_z = CosAlpha; |
---|
584 | |
---|
585 | FacetNormal.setX(unit_x); |
---|
586 | FacetNormal.setY(unit_y); |
---|
587 | FacetNormal.setZ(unit_z); |
---|
588 | |
---|
589 | G4ThreeVector tmpNormal = Normal; |
---|
590 | |
---|
591 | FacetNormal.rotateUz(tmpNormal); |
---|
592 | } while (Momentum * FacetNormal >= 0.0); |
---|
593 | } |
---|
594 | else { |
---|
595 | |
---|
596 | G4double polish = 1.0; |
---|
597 | if (OpticalSurface) polish = OpticalSurface->GetPolish(); |
---|
598 | |
---|
599 | if (polish < 1.0) { |
---|
600 | do { |
---|
601 | G4ThreeVector smear; |
---|
602 | do { |
---|
603 | smear.setX(2.*G4UniformRand()-1.0); |
---|
604 | smear.setY(2.*G4UniformRand()-1.0); |
---|
605 | smear.setZ(2.*G4UniformRand()-1.0); |
---|
606 | } while (smear.mag()>1.0); |
---|
607 | smear = (1.-polish) * smear; |
---|
608 | FacetNormal = Normal + smear; |
---|
609 | } while (Momentum * FacetNormal >= 0.0); |
---|
610 | FacetNormal = FacetNormal.unit(); |
---|
611 | } |
---|
612 | else { |
---|
613 | FacetNormal = Normal; |
---|
614 | } |
---|
615 | } |
---|
616 | return FacetNormal; |
---|
617 | } |
---|
618 | |
---|
619 | void G4OpBoundaryProcess::DielectricMetal() |
---|
620 | { |
---|
621 | G4int n = 0; |
---|
622 | |
---|
623 | do { |
---|
624 | |
---|
625 | n++; |
---|
626 | |
---|
627 | if( !G4BooleanRand(theReflectivity) && n == 1 ) { |
---|
628 | |
---|
629 | // Comment out DoAbsorption and uncomment theStatus = Absorption; |
---|
630 | // if you wish to have Transmission instead of Absorption |
---|
631 | |
---|
632 | DoAbsorption(); |
---|
633 | // theStatus = Absorption; |
---|
634 | break; |
---|
635 | |
---|
636 | } |
---|
637 | else { |
---|
638 | |
---|
639 | if (PropertyPointer1 && PropertyPointer2) { |
---|
640 | if ( n > 1 ) { |
---|
641 | CalculateReflectivity(); |
---|
642 | if ( !G4BooleanRand(theReflectivity) ) { |
---|
643 | DoAbsorption(); |
---|
644 | break; |
---|
645 | } |
---|
646 | } |
---|
647 | } |
---|
648 | |
---|
649 | if ( theModel == glisur || theFinish == polished ) { |
---|
650 | |
---|
651 | DoReflection(); |
---|
652 | |
---|
653 | } else { |
---|
654 | |
---|
655 | if ( n == 1 ) ChooseReflection(); |
---|
656 | |
---|
657 | if ( theStatus == LambertianReflection ) { |
---|
658 | DoReflection(); |
---|
659 | } |
---|
660 | else if ( theStatus == BackScattering ) { |
---|
661 | NewMomentum = -OldMomentum; |
---|
662 | NewPolarization = -OldPolarization; |
---|
663 | } |
---|
664 | else { |
---|
665 | |
---|
666 | if(theStatus==LobeReflection){ |
---|
667 | if ( PropertyPointer1 && PropertyPointer2 ){ |
---|
668 | } else { |
---|
669 | theFacetNormal = |
---|
670 | GetFacetNormal(OldMomentum,theGlobalNormal); |
---|
671 | } |
---|
672 | } |
---|
673 | |
---|
674 | G4double PdotN = OldMomentum * theFacetNormal; |
---|
675 | NewMomentum = OldMomentum - (2.*PdotN)*theFacetNormal; |
---|
676 | G4double EdotN = OldPolarization * theFacetNormal; |
---|
677 | |
---|
678 | G4ThreeVector A_trans, A_paral; |
---|
679 | |
---|
680 | if (sint1 > 0.0 ) { |
---|
681 | A_trans = OldMomentum.cross(theFacetNormal); |
---|
682 | A_trans = A_trans.unit(); |
---|
683 | } else { |
---|
684 | A_trans = OldPolarization; |
---|
685 | } |
---|
686 | A_paral = NewMomentum.cross(A_trans); |
---|
687 | A_paral = A_paral.unit(); |
---|
688 | |
---|
689 | if(iTE>0&&iTM>0) { |
---|
690 | NewPolarization = |
---|
691 | -OldPolarization + (2.*EdotN)*theFacetNormal; |
---|
692 | } else if (iTE>0) { |
---|
693 | NewPolarization = -A_trans; |
---|
694 | } else if (iTM>0) { |
---|
695 | NewPolarization = -A_paral; |
---|
696 | } |
---|
697 | |
---|
698 | } |
---|
699 | |
---|
700 | } |
---|
701 | |
---|
702 | OldMomentum = NewMomentum; |
---|
703 | OldPolarization = NewPolarization; |
---|
704 | |
---|
705 | } |
---|
706 | |
---|
707 | } while (NewMomentum * theGlobalNormal < 0.0); |
---|
708 | } |
---|
709 | |
---|
710 | void G4OpBoundaryProcess::DielectricLUT() |
---|
711 | { |
---|
712 | G4int thetaIndex, phiIndex; |
---|
713 | G4double AngularDistributionValue, thetaRad, phiRad, EdotN; |
---|
714 | G4ThreeVector PerpendicularVectorTheta, PerpendicularVectorPhi; |
---|
715 | |
---|
716 | theStatus = G4OpBoundaryProcessStatus(G4int(theFinish) + |
---|
717 | (G4int(NoRINDEX)-G4int(groundbackpainted))); |
---|
718 | |
---|
719 | G4int thetaIndexMax = OpticalSurface->GetThetaIndexMax(); |
---|
720 | G4int phiIndexMax = OpticalSurface->GetPhiIndexMax(); |
---|
721 | |
---|
722 | do { |
---|
723 | if ( !G4BooleanRand(theReflectivity) ) // Not reflected, so Absorbed |
---|
724 | DoAbsorption(); |
---|
725 | else { |
---|
726 | // Calculate Angle between Normal and Photon Momentum |
---|
727 | G4double anglePhotonToNormal = |
---|
728 | OldMomentum.angle(-theGlobalNormal); |
---|
729 | // Round it to closest integer |
---|
730 | G4int angleIncident = G4int(std::floor(180/pi*anglePhotonToNormal+0.5)); |
---|
731 | |
---|
732 | // Take random angles THETA and PHI, |
---|
733 | // and see if below Probability - if not - Redo |
---|
734 | do { |
---|
735 | thetaIndex = CLHEP::RandFlat::shootInt(thetaIndexMax-1); |
---|
736 | phiIndex = CLHEP::RandFlat::shootInt(phiIndexMax-1); |
---|
737 | // Find probability with the new indeces from LUT |
---|
738 | AngularDistributionValue = OpticalSurface -> |
---|
739 | GetAngularDistributionValue(angleIncident, |
---|
740 | thetaIndex, |
---|
741 | phiIndex); |
---|
742 | } while ( !G4BooleanRand(AngularDistributionValue) ); |
---|
743 | |
---|
744 | thetaRad = (-90 + 4*thetaIndex)*pi/180; |
---|
745 | phiRad = (-90 + 5*phiIndex)*pi/180; |
---|
746 | // Rotate Photon Momentum in Theta, then in Phi |
---|
747 | NewMomentum = -OldMomentum; |
---|
748 | PerpendicularVectorTheta = NewMomentum.cross(theGlobalNormal); |
---|
749 | if (PerpendicularVectorTheta.mag() > kCarTolerance ) { |
---|
750 | PerpendicularVectorPhi = |
---|
751 | PerpendicularVectorTheta.cross(NewMomentum); |
---|
752 | } |
---|
753 | else { |
---|
754 | PerpendicularVectorTheta = NewMomentum.orthogonal(); |
---|
755 | PerpendicularVectorPhi = |
---|
756 | PerpendicularVectorTheta.cross(NewMomentum); |
---|
757 | } |
---|
758 | NewMomentum = |
---|
759 | NewMomentum.rotate(anglePhotonToNormal-thetaRad, |
---|
760 | PerpendicularVectorTheta); |
---|
761 | NewMomentum = NewMomentum.rotate(-phiRad,PerpendicularVectorPhi); |
---|
762 | // Rotate Polarization too: |
---|
763 | theFacetNormal = (NewMomentum - OldMomentum).unit(); |
---|
764 | EdotN = OldPolarization * theFacetNormal; |
---|
765 | NewPolarization = -OldPolarization + (2.*EdotN)*theFacetNormal; |
---|
766 | } |
---|
767 | } while (NewMomentum * theGlobalNormal <= 0.0); |
---|
768 | } |
---|
769 | |
---|
770 | void G4OpBoundaryProcess::DielectricDielectric() |
---|
771 | { |
---|
772 | G4bool Inside = false; |
---|
773 | G4bool Swap = false; |
---|
774 | |
---|
775 | leap: |
---|
776 | |
---|
777 | G4bool Through = false; |
---|
778 | G4bool Done = false; |
---|
779 | |
---|
780 | do { |
---|
781 | |
---|
782 | if (Through) { |
---|
783 | Swap = !Swap; |
---|
784 | Through = false; |
---|
785 | theGlobalNormal = -theGlobalNormal; |
---|
786 | G4SwapPtr(Material1,Material2); |
---|
787 | G4SwapObj(&Rindex1,&Rindex2); |
---|
788 | } |
---|
789 | |
---|
790 | if ( theFinish == polished ) { |
---|
791 | theFacetNormal = theGlobalNormal; |
---|
792 | } |
---|
793 | else { |
---|
794 | theFacetNormal = |
---|
795 | GetFacetNormal(OldMomentum,theGlobalNormal); |
---|
796 | } |
---|
797 | |
---|
798 | G4double PdotN = OldMomentum * theFacetNormal; |
---|
799 | G4double EdotN = OldPolarization * theFacetNormal; |
---|
800 | |
---|
801 | cost1 = - PdotN; |
---|
802 | if (std::abs(cost1) < 1.0-kCarTolerance){ |
---|
803 | sint1 = std::sqrt(1.-cost1*cost1); |
---|
804 | sint2 = sint1*Rindex1/Rindex2; // *** Snell's Law *** |
---|
805 | } |
---|
806 | else { |
---|
807 | sint1 = 0.0; |
---|
808 | sint2 = 0.0; |
---|
809 | } |
---|
810 | |
---|
811 | if (sint2 >= 1.0) { |
---|
812 | |
---|
813 | // Simulate total internal reflection |
---|
814 | |
---|
815 | if (Swap) Swap = !Swap; |
---|
816 | |
---|
817 | theStatus = TotalInternalReflection; |
---|
818 | |
---|
819 | if ( theModel == unified && theFinish != polished ) |
---|
820 | ChooseReflection(); |
---|
821 | |
---|
822 | if ( theStatus == LambertianReflection ) { |
---|
823 | DoReflection(); |
---|
824 | } |
---|
825 | else if ( theStatus == BackScattering ) { |
---|
826 | NewMomentum = -OldMomentum; |
---|
827 | NewPolarization = -OldPolarization; |
---|
828 | } |
---|
829 | else { |
---|
830 | |
---|
831 | PdotN = OldMomentum * theFacetNormal; |
---|
832 | NewMomentum = OldMomentum - (2.*PdotN)*theFacetNormal; |
---|
833 | EdotN = OldPolarization * theFacetNormal; |
---|
834 | NewPolarization = -OldPolarization + (2.*EdotN)*theFacetNormal; |
---|
835 | |
---|
836 | } |
---|
837 | } |
---|
838 | else if (sint2 < 1.0) { |
---|
839 | |
---|
840 | // Calculate amplitude for transmission (Q = P x N) |
---|
841 | |
---|
842 | if (cost1 > 0.0) { |
---|
843 | cost2 = std::sqrt(1.-sint2*sint2); |
---|
844 | } |
---|
845 | else { |
---|
846 | cost2 = -std::sqrt(1.-sint2*sint2); |
---|
847 | } |
---|
848 | |
---|
849 | G4ThreeVector A_trans, A_paral, E1pp, E1pl; |
---|
850 | G4double E1_perp, E1_parl; |
---|
851 | |
---|
852 | if (sint1 > 0.0) { |
---|
853 | A_trans = OldMomentum.cross(theFacetNormal); |
---|
854 | A_trans = A_trans.unit(); |
---|
855 | E1_perp = OldPolarization * A_trans; |
---|
856 | E1pp = E1_perp * A_trans; |
---|
857 | E1pl = OldPolarization - E1pp; |
---|
858 | E1_parl = E1pl.mag(); |
---|
859 | } |
---|
860 | else { |
---|
861 | A_trans = OldPolarization; |
---|
862 | // Here we Follow Jackson's conventions and we set the |
---|
863 | // parallel component = 1 in case of a ray perpendicular |
---|
864 | // to the surface |
---|
865 | E1_perp = 0.0; |
---|
866 | E1_parl = 1.0; |
---|
867 | } |
---|
868 | |
---|
869 | G4double s1 = Rindex1*cost1; |
---|
870 | G4double E2_perp = 2.*s1*E1_perp/(Rindex1*cost1+Rindex2*cost2); |
---|
871 | G4double E2_parl = 2.*s1*E1_parl/(Rindex2*cost1+Rindex1*cost2); |
---|
872 | G4double E2_total = E2_perp*E2_perp + E2_parl*E2_parl; |
---|
873 | G4double s2 = Rindex2*cost2*E2_total; |
---|
874 | |
---|
875 | G4double TransCoeff; |
---|
876 | |
---|
877 | if (cost1 != 0.0) { |
---|
878 | TransCoeff = s2/s1; |
---|
879 | } |
---|
880 | else { |
---|
881 | TransCoeff = 0.0; |
---|
882 | } |
---|
883 | |
---|
884 | G4double E2_abs, C_parl, C_perp; |
---|
885 | |
---|
886 | if ( !G4BooleanRand(TransCoeff) ) { |
---|
887 | |
---|
888 | // Simulate reflection |
---|
889 | |
---|
890 | if (Swap) Swap = !Swap; |
---|
891 | |
---|
892 | theStatus = FresnelReflection; |
---|
893 | |
---|
894 | if ( theModel == unified && theFinish != polished ) |
---|
895 | ChooseReflection(); |
---|
896 | |
---|
897 | if ( theStatus == LambertianReflection ) { |
---|
898 | DoReflection(); |
---|
899 | } |
---|
900 | else if ( theStatus == BackScattering ) { |
---|
901 | NewMomentum = -OldMomentum; |
---|
902 | NewPolarization = -OldPolarization; |
---|
903 | } |
---|
904 | else { |
---|
905 | |
---|
906 | PdotN = OldMomentum * theFacetNormal; |
---|
907 | NewMomentum = OldMomentum - (2.*PdotN)*theFacetNormal; |
---|
908 | |
---|
909 | if (sint1 > 0.0) { // incident ray oblique |
---|
910 | |
---|
911 | E2_parl = Rindex2*E2_parl/Rindex1 - E1_parl; |
---|
912 | E2_perp = E2_perp - E1_perp; |
---|
913 | E2_total = E2_perp*E2_perp + E2_parl*E2_parl; |
---|
914 | A_paral = NewMomentum.cross(A_trans); |
---|
915 | A_paral = A_paral.unit(); |
---|
916 | E2_abs = std::sqrt(E2_total); |
---|
917 | C_parl = E2_parl/E2_abs; |
---|
918 | C_perp = E2_perp/E2_abs; |
---|
919 | |
---|
920 | NewPolarization = C_parl*A_paral + C_perp*A_trans; |
---|
921 | |
---|
922 | } |
---|
923 | |
---|
924 | else { // incident ray perpendicular |
---|
925 | |
---|
926 | if (Rindex2 > Rindex1) { |
---|
927 | NewPolarization = - OldPolarization; |
---|
928 | } |
---|
929 | else { |
---|
930 | NewPolarization = OldPolarization; |
---|
931 | } |
---|
932 | |
---|
933 | } |
---|
934 | } |
---|
935 | } |
---|
936 | else { // photon gets transmitted |
---|
937 | |
---|
938 | // Simulate transmission/refraction |
---|
939 | |
---|
940 | Inside = !Inside; |
---|
941 | Through = true; |
---|
942 | theStatus = FresnelRefraction; |
---|
943 | |
---|
944 | if (sint1 > 0.0) { // incident ray oblique |
---|
945 | |
---|
946 | G4double alpha = cost1 - cost2*(Rindex2/Rindex1); |
---|
947 | NewMomentum = OldMomentum + alpha*theFacetNormal; |
---|
948 | NewMomentum = NewMomentum.unit(); |
---|
949 | PdotN = -cost2; |
---|
950 | A_paral = NewMomentum.cross(A_trans); |
---|
951 | A_paral = A_paral.unit(); |
---|
952 | E2_abs = std::sqrt(E2_total); |
---|
953 | C_parl = E2_parl/E2_abs; |
---|
954 | C_perp = E2_perp/E2_abs; |
---|
955 | |
---|
956 | NewPolarization = C_parl*A_paral + C_perp*A_trans; |
---|
957 | |
---|
958 | } |
---|
959 | else { // incident ray perpendicular |
---|
960 | |
---|
961 | NewMomentum = OldMomentum; |
---|
962 | NewPolarization = OldPolarization; |
---|
963 | |
---|
964 | } |
---|
965 | } |
---|
966 | } |
---|
967 | |
---|
968 | OldMomentum = NewMomentum.unit(); |
---|
969 | OldPolarization = NewPolarization.unit(); |
---|
970 | |
---|
971 | if (theStatus == FresnelRefraction) { |
---|
972 | Done = (NewMomentum * theGlobalNormal <= 0.0); |
---|
973 | } |
---|
974 | else { |
---|
975 | Done = (NewMomentum * theGlobalNormal >= 0.0); |
---|
976 | } |
---|
977 | |
---|
978 | } while (!Done); |
---|
979 | |
---|
980 | if (Inside && !Swap) { |
---|
981 | if( theFinish == polishedbackpainted || |
---|
982 | theFinish == groundbackpainted ) { |
---|
983 | |
---|
984 | if( !G4BooleanRand(theReflectivity) ) { |
---|
985 | DoAbsorption(); |
---|
986 | } |
---|
987 | else { |
---|
988 | if (theStatus != FresnelRefraction ) { |
---|
989 | theGlobalNormal = -theGlobalNormal; |
---|
990 | } |
---|
991 | else { |
---|
992 | Swap = !Swap; |
---|
993 | G4SwapPtr(Material1,Material2); |
---|
994 | G4SwapObj(&Rindex1,&Rindex2); |
---|
995 | } |
---|
996 | if ( theFinish == groundbackpainted ) |
---|
997 | theStatus = LambertianReflection; |
---|
998 | |
---|
999 | DoReflection(); |
---|
1000 | |
---|
1001 | theGlobalNormal = -theGlobalNormal; |
---|
1002 | OldMomentum = NewMomentum; |
---|
1003 | |
---|
1004 | goto leap; |
---|
1005 | } |
---|
1006 | } |
---|
1007 | } |
---|
1008 | } |
---|
1009 | |
---|
1010 | // GetMeanFreePath |
---|
1011 | // --------------- |
---|
1012 | // |
---|
1013 | G4double G4OpBoundaryProcess::GetMeanFreePath(const G4Track& , |
---|
1014 | G4double , |
---|
1015 | G4ForceCondition* condition) |
---|
1016 | { |
---|
1017 | *condition = Forced; |
---|
1018 | |
---|
1019 | return DBL_MAX; |
---|
1020 | } |
---|
1021 | |
---|
1022 | G4double G4OpBoundaryProcess::GetIncidentAngle() |
---|
1023 | { |
---|
1024 | G4double PdotN = OldMomentum * theFacetNormal; |
---|
1025 | G4double magP= OldMomentum.mag(); |
---|
1026 | G4double magN= theFacetNormal.mag(); |
---|
1027 | G4double incidentangle = pi - std::acos(PdotN/(magP*magN)); |
---|
1028 | |
---|
1029 | return incidentangle; |
---|
1030 | } |
---|
1031 | |
---|
1032 | G4double G4OpBoundaryProcess::GetReflectivity(G4double E1_perp, |
---|
1033 | G4double E1_parl, |
---|
1034 | G4double incidentangle, |
---|
1035 | G4double RealRindex, |
---|
1036 | G4double ImaginaryRindex) |
---|
1037 | { |
---|
1038 | |
---|
1039 | G4complex Reflectivity, Reflectivity_TE, Reflectivity_TM; |
---|
1040 | G4complex N(RealRindex, ImaginaryRindex); |
---|
1041 | G4complex CosPhi; |
---|
1042 | |
---|
1043 | G4complex u(1,0); //unit number 1 |
---|
1044 | |
---|
1045 | G4complex numeratorTE; // E1_perp=1 E1_parl=0 -> TE polarization |
---|
1046 | G4complex numeratorTM; // E1_parl=1 E1_perp=0 -> TM polarization |
---|
1047 | G4complex denominatorTE, denominatorTM; |
---|
1048 | G4complex rTM, rTE; |
---|
1049 | |
---|
1050 | // Following two equations, rTM and rTE, are from: "Introduction To Modern |
---|
1051 | // Optics" written by Fowles |
---|
1052 | |
---|
1053 | CosPhi=std::sqrt(u-((std::sin(incidentangle)*std::sin(incidentangle))/(N*N))); |
---|
1054 | |
---|
1055 | numeratorTE = std::cos(incidentangle) - N*CosPhi; |
---|
1056 | denominatorTE = std::cos(incidentangle) + N*CosPhi; |
---|
1057 | rTE = numeratorTE/denominatorTE; |
---|
1058 | |
---|
1059 | numeratorTM = N*std::cos(incidentangle) - CosPhi; |
---|
1060 | denominatorTM = N*std::cos(incidentangle) + CosPhi; |
---|
1061 | rTM = numeratorTM/denominatorTM; |
---|
1062 | |
---|
1063 | // This is my calculaton for reflectivity on a metalic surface |
---|
1064 | // depending on the fraction of TE and TM polarization |
---|
1065 | // when TE polarization, E1_parl=0 and E1_perp=1, R=abs(rTE)^2 and |
---|
1066 | // when TM polarization, E1_parl=1 and E1_perp=0, R=abs(rTM)^2 |
---|
1067 | |
---|
1068 | Reflectivity_TE = (rTE*conj(rTE))*(E1_perp*E1_perp) |
---|
1069 | / (E1_perp*E1_perp + E1_parl*E1_parl); |
---|
1070 | Reflectivity_TM = (rTM*conj(rTM))*(E1_parl*E1_parl) |
---|
1071 | / (E1_perp*E1_perp + E1_parl*E1_parl); |
---|
1072 | Reflectivity = Reflectivity_TE + Reflectivity_TM; |
---|
1073 | |
---|
1074 | do { |
---|
1075 | if(G4UniformRand()*real(Reflectivity) > real(Reflectivity_TE)) |
---|
1076 | {iTE = -1;}else{iTE = 1;} |
---|
1077 | if(G4UniformRand()*real(Reflectivity) > real(Reflectivity_TM)) |
---|
1078 | {iTM = -1;}else{iTM = 1;} |
---|
1079 | } while(iTE<0&&iTM<0); |
---|
1080 | |
---|
1081 | return real(Reflectivity); |
---|
1082 | |
---|
1083 | } |
---|
1084 | |
---|
1085 | void G4OpBoundaryProcess::CalculateReflectivity() |
---|
1086 | { |
---|
1087 | G4double RealRindex = |
---|
1088 | PropertyPointer1->GetProperty(thePhotonMomentum); |
---|
1089 | G4double ImaginaryRindex = |
---|
1090 | PropertyPointer2->GetProperty(thePhotonMomentum); |
---|
1091 | |
---|
1092 | // calculate FacetNormal |
---|
1093 | if ( theFinish == ground ) { |
---|
1094 | theFacetNormal = |
---|
1095 | GetFacetNormal(OldMomentum, theGlobalNormal); |
---|
1096 | } else { |
---|
1097 | theFacetNormal = theGlobalNormal; |
---|
1098 | } |
---|
1099 | |
---|
1100 | G4double PdotN = OldMomentum * theFacetNormal; |
---|
1101 | cost1 = -PdotN; |
---|
1102 | |
---|
1103 | if (std::abs(cost1) < 1.0 - kCarTolerance) { |
---|
1104 | sint1 = std::sqrt(1. - cost1*cost1); |
---|
1105 | } else { |
---|
1106 | sint1 = 0.0; |
---|
1107 | } |
---|
1108 | |
---|
1109 | G4ThreeVector A_trans, A_paral, E1pp, E1pl; |
---|
1110 | G4double E1_perp, E1_parl; |
---|
1111 | |
---|
1112 | if (sint1 > 0.0 ) { |
---|
1113 | A_trans = OldMomentum.cross(theFacetNormal); |
---|
1114 | A_trans = A_trans.unit(); |
---|
1115 | E1_perp = OldPolarization * A_trans; |
---|
1116 | E1pp = E1_perp * A_trans; |
---|
1117 | E1pl = OldPolarization - E1pp; |
---|
1118 | E1_parl = E1pl.mag(); |
---|
1119 | } |
---|
1120 | else { |
---|
1121 | A_trans = OldPolarization; |
---|
1122 | // Here we Follow Jackson's conventions and we set the |
---|
1123 | // parallel component = 1 in case of a ray perpendicular |
---|
1124 | // to the surface |
---|
1125 | E1_perp = 0.0; |
---|
1126 | E1_parl = 1.0; |
---|
1127 | } |
---|
1128 | |
---|
1129 | //calculate incident angle |
---|
1130 | G4double incidentangle = GetIncidentAngle(); |
---|
1131 | |
---|
1132 | //calculate the reflectivity depending on incident angle, |
---|
1133 | //polarization and complex refractive |
---|
1134 | |
---|
1135 | theReflectivity = |
---|
1136 | GetReflectivity(E1_perp, E1_parl, incidentangle, |
---|
1137 | RealRindex, ImaginaryRindex); |
---|
1138 | } |
---|