[819] | 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.) |
---|
[1196] | 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.) |
---|
[819] | 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" |
---|
[963] | 74 | #include "G4OpProcessSubType.hh" |
---|
| 75 | |
---|
[819] | 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 | |
---|
[963] | 103 | SetProcessSubType(fOpBoundary); |
---|
| 104 | |
---|
[819] | 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 | kCarTolerance = G4GeometryTolerance::GetInstance() |
---|
| 116 | ->GetSurfaceTolerance(); |
---|
| 117 | |
---|
| 118 | } |
---|
| 119 | |
---|
| 120 | // G4OpBoundaryProcess::G4OpBoundaryProcess(const G4OpBoundaryProcess &right) |
---|
| 121 | // { |
---|
| 122 | // } |
---|
| 123 | |
---|
| 124 | //////////////// |
---|
| 125 | // Destructors |
---|
| 126 | //////////////// |
---|
| 127 | |
---|
| 128 | G4OpBoundaryProcess::~G4OpBoundaryProcess(){} |
---|
| 129 | |
---|
| 130 | //////////// |
---|
| 131 | // Methods |
---|
| 132 | //////////// |
---|
| 133 | |
---|
| 134 | // PostStepDoIt |
---|
| 135 | // ------------ |
---|
| 136 | // |
---|
| 137 | G4VParticleChange* |
---|
| 138 | G4OpBoundaryProcess::PostStepDoIt(const G4Track& aTrack, const G4Step& aStep) |
---|
| 139 | { |
---|
| 140 | theStatus = Undefined; |
---|
| 141 | |
---|
| 142 | aParticleChange.Initialize(aTrack); |
---|
| 143 | |
---|
| 144 | G4StepPoint* pPreStepPoint = aStep.GetPreStepPoint(); |
---|
| 145 | G4StepPoint* pPostStepPoint = aStep.GetPostStepPoint(); |
---|
| 146 | |
---|
[1196] | 147 | if ( verboseLevel > 0 ) { |
---|
| 148 | G4cout << " Photon at Boundary! " << G4endl; |
---|
| 149 | G4VPhysicalVolume* thePrePV = pPreStepPoint->GetPhysicalVolume(); |
---|
| 150 | G4VPhysicalVolume* thePostPV = pPostStepPoint->GetPhysicalVolume(); |
---|
| 151 | if (thePrePV) G4cout << " thePrePV: " << thePrePV->GetName() << G4endl; |
---|
| 152 | if (thePostPV) G4cout << " thePostPV: " << thePostPV->GetName() << G4endl; |
---|
| 153 | } |
---|
| 154 | |
---|
[819] | 155 | if (pPostStepPoint->GetStepStatus() != fGeomBoundary){ |
---|
| 156 | theStatus = NotAtBoundary; |
---|
[1196] | 157 | if ( verboseLevel > 0) BoundaryProcessVerbose(); |
---|
[819] | 158 | return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep); |
---|
| 159 | } |
---|
| 160 | if (aTrack.GetStepLength()<=kCarTolerance/2){ |
---|
| 161 | theStatus = StepTooSmall; |
---|
[1196] | 162 | if ( verboseLevel > 0) BoundaryProcessVerbose(); |
---|
[819] | 163 | return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep); |
---|
| 164 | } |
---|
| 165 | |
---|
| 166 | Material1 = pPreStepPoint -> GetMaterial(); |
---|
| 167 | Material2 = pPostStepPoint -> GetMaterial(); |
---|
| 168 | |
---|
| 169 | const G4DynamicParticle* aParticle = aTrack.GetDynamicParticle(); |
---|
| 170 | |
---|
| 171 | thePhotonMomentum = aParticle->GetTotalMomentum(); |
---|
| 172 | OldMomentum = aParticle->GetMomentumDirection(); |
---|
| 173 | OldPolarization = aParticle->GetPolarization(); |
---|
| 174 | |
---|
[1196] | 175 | if ( verboseLevel > 0 ) { |
---|
| 176 | G4cout << " Old Momentum Direction: " << OldMomentum << G4endl; |
---|
| 177 | G4cout << " Old Polarization: " << OldPolarization << G4endl; |
---|
| 178 | } |
---|
| 179 | |
---|
[819] | 180 | G4ThreeVector theGlobalPoint = pPostStepPoint->GetPosition(); |
---|
| 181 | |
---|
| 182 | G4Navigator* theNavigator = |
---|
| 183 | G4TransportationManager::GetTransportationManager()-> |
---|
| 184 | GetNavigatorForTracking(); |
---|
| 185 | |
---|
| 186 | G4ThreeVector theLocalPoint = theNavigator-> |
---|
| 187 | GetGlobalToLocalTransform(). |
---|
| 188 | TransformPoint(theGlobalPoint); |
---|
| 189 | |
---|
| 190 | G4ThreeVector theLocalNormal; // Normal points back into volume |
---|
| 191 | |
---|
| 192 | G4bool valid; |
---|
| 193 | theLocalNormal = theNavigator->GetLocalExitNormal(&valid); |
---|
| 194 | |
---|
| 195 | if (valid) { |
---|
| 196 | theLocalNormal = -theLocalNormal; |
---|
| 197 | } |
---|
| 198 | else { |
---|
| 199 | G4cerr << " G4OpBoundaryProcess/PostStepDoIt(): " |
---|
[1055] | 200 | << " The Navigator reports that it returned an invalid normal" |
---|
| 201 | << G4endl; |
---|
| 202 | G4Exception("G4OpBoundaryProcess::PostStepDoIt", |
---|
| 203 | "Invalid Surface Normal", |
---|
| 204 | EventMustBeAborted, |
---|
| 205 | "Geometry must return valid surface normal"); |
---|
[819] | 206 | } |
---|
| 207 | |
---|
| 208 | theGlobalNormal = theNavigator->GetLocalToGlobalTransform(). |
---|
| 209 | TransformAxis(theLocalNormal); |
---|
| 210 | |
---|
| 211 | if (OldMomentum * theGlobalNormal > 0.0) { |
---|
| 212 | #ifdef G4DEBUG_OPTICAL |
---|
| 213 | G4cerr << " G4OpBoundaryProcess/PostStepDoIt(): " |
---|
| 214 | << " theGlobalNormal points the wrong direction " |
---|
| 215 | << G4endl; |
---|
| 216 | #endif |
---|
| 217 | theGlobalNormal = -theGlobalNormal; |
---|
| 218 | } |
---|
| 219 | |
---|
| 220 | G4MaterialPropertiesTable* aMaterialPropertiesTable; |
---|
| 221 | G4MaterialPropertyVector* Rindex; |
---|
| 222 | |
---|
| 223 | aMaterialPropertiesTable = Material1->GetMaterialPropertiesTable(); |
---|
| 224 | if (aMaterialPropertiesTable) { |
---|
| 225 | Rindex = aMaterialPropertiesTable->GetProperty("RINDEX"); |
---|
| 226 | } |
---|
| 227 | else { |
---|
| 228 | theStatus = NoRINDEX; |
---|
[1196] | 229 | if ( verboseLevel > 0) BoundaryProcessVerbose(); |
---|
[819] | 230 | aParticleChange.ProposeTrackStatus(fStopAndKill); |
---|
| 231 | return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep); |
---|
| 232 | } |
---|
| 233 | |
---|
| 234 | if (Rindex) { |
---|
| 235 | Rindex1 = Rindex->GetProperty(thePhotonMomentum); |
---|
| 236 | } |
---|
| 237 | else { |
---|
| 238 | theStatus = NoRINDEX; |
---|
[1196] | 239 | if ( verboseLevel > 0) BoundaryProcessVerbose(); |
---|
[819] | 240 | aParticleChange.ProposeTrackStatus(fStopAndKill); |
---|
| 241 | return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep); |
---|
| 242 | } |
---|
| 243 | |
---|
[1196] | 244 | theReflectivity = 1.; |
---|
| 245 | theEfficiency = 0.; |
---|
| 246 | |
---|
[819] | 247 | theModel = glisur; |
---|
| 248 | theFinish = polished; |
---|
| 249 | |
---|
| 250 | G4SurfaceType type = dielectric_dielectric; |
---|
| 251 | |
---|
| 252 | Rindex = NULL; |
---|
| 253 | OpticalSurface = NULL; |
---|
| 254 | |
---|
[963] | 255 | G4LogicalSurface* Surface = NULL; |
---|
[819] | 256 | |
---|
[963] | 257 | Surface = G4LogicalBorderSurface::GetSurface |
---|
| 258 | (pPreStepPoint ->GetPhysicalVolume(), |
---|
| 259 | pPostStepPoint->GetPhysicalVolume()); |
---|
| 260 | |
---|
[819] | 261 | if (Surface == NULL){ |
---|
| 262 | G4bool enteredDaughter=(pPostStepPoint->GetPhysicalVolume() |
---|
| 263 | ->GetMotherLogical() == |
---|
| 264 | pPreStepPoint->GetPhysicalVolume() |
---|
| 265 | ->GetLogicalVolume()); |
---|
| 266 | if(enteredDaughter){ |
---|
| 267 | Surface = G4LogicalSkinSurface::GetSurface |
---|
| 268 | (pPostStepPoint->GetPhysicalVolume()-> |
---|
| 269 | GetLogicalVolume()); |
---|
| 270 | if(Surface == NULL) |
---|
| 271 | Surface = G4LogicalSkinSurface::GetSurface |
---|
| 272 | (pPreStepPoint->GetPhysicalVolume()-> |
---|
| 273 | GetLogicalVolume()); |
---|
| 274 | } |
---|
| 275 | else { |
---|
| 276 | Surface = G4LogicalSkinSurface::GetSurface |
---|
| 277 | (pPreStepPoint->GetPhysicalVolume()-> |
---|
| 278 | GetLogicalVolume()); |
---|
| 279 | if(Surface == NULL) |
---|
| 280 | Surface = G4LogicalSkinSurface::GetSurface |
---|
| 281 | (pPostStepPoint->GetPhysicalVolume()-> |
---|
| 282 | GetLogicalVolume()); |
---|
| 283 | } |
---|
| 284 | } |
---|
| 285 | |
---|
[963] | 286 | if (Surface) OpticalSurface = |
---|
| 287 | dynamic_cast <G4OpticalSurface*> (Surface->GetSurfaceProperty()); |
---|
[819] | 288 | |
---|
| 289 | if (OpticalSurface) { |
---|
| 290 | |
---|
| 291 | type = OpticalSurface->GetType(); |
---|
| 292 | theModel = OpticalSurface->GetModel(); |
---|
| 293 | theFinish = OpticalSurface->GetFinish(); |
---|
| 294 | |
---|
| 295 | aMaterialPropertiesTable = OpticalSurface-> |
---|
| 296 | GetMaterialPropertiesTable(); |
---|
| 297 | |
---|
| 298 | if (aMaterialPropertiesTable) { |
---|
| 299 | |
---|
| 300 | if (theFinish == polishedbackpainted || |
---|
| 301 | theFinish == groundbackpainted ) { |
---|
| 302 | Rindex = aMaterialPropertiesTable->GetProperty("RINDEX"); |
---|
| 303 | if (Rindex) { |
---|
| 304 | Rindex2 = Rindex->GetProperty(thePhotonMomentum); |
---|
| 305 | } |
---|
| 306 | else { |
---|
| 307 | theStatus = NoRINDEX; |
---|
[1196] | 308 | if ( verboseLevel > 0) BoundaryProcessVerbose(); |
---|
[819] | 309 | aParticleChange.ProposeTrackStatus(fStopAndKill); |
---|
| 310 | return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep); |
---|
| 311 | } |
---|
| 312 | } |
---|
| 313 | |
---|
| 314 | PropertyPointer = |
---|
| 315 | aMaterialPropertiesTable->GetProperty("REFLECTIVITY"); |
---|
| 316 | PropertyPointer1 = |
---|
| 317 | aMaterialPropertiesTable->GetProperty("REALRINDEX"); |
---|
| 318 | PropertyPointer2 = |
---|
| 319 | aMaterialPropertiesTable->GetProperty("IMAGINARYRINDEX"); |
---|
| 320 | |
---|
| 321 | iTE = 1; |
---|
| 322 | iTM = 1; |
---|
| 323 | |
---|
| 324 | if (PropertyPointer) { |
---|
| 325 | |
---|
| 326 | theReflectivity = |
---|
| 327 | PropertyPointer->GetProperty(thePhotonMomentum); |
---|
| 328 | |
---|
| 329 | } else if (PropertyPointer1 && PropertyPointer2) { |
---|
| 330 | |
---|
[1055] | 331 | CalculateReflectivity(); |
---|
[819] | 332 | |
---|
| 333 | } |
---|
| 334 | |
---|
| 335 | PropertyPointer = |
---|
| 336 | aMaterialPropertiesTable->GetProperty("EFFICIENCY"); |
---|
| 337 | if (PropertyPointer) { |
---|
| 338 | theEfficiency = |
---|
| 339 | PropertyPointer->GetProperty(thePhotonMomentum); |
---|
| 340 | } |
---|
| 341 | |
---|
| 342 | if ( theModel == unified ) { |
---|
| 343 | PropertyPointer = |
---|
| 344 | aMaterialPropertiesTable->GetProperty("SPECULARLOBECONSTANT"); |
---|
| 345 | if (PropertyPointer) { |
---|
| 346 | prob_sl = |
---|
| 347 | PropertyPointer->GetProperty(thePhotonMomentum); |
---|
| 348 | } else { |
---|
| 349 | prob_sl = 0.0; |
---|
| 350 | } |
---|
| 351 | |
---|
| 352 | PropertyPointer = |
---|
| 353 | aMaterialPropertiesTable->GetProperty("SPECULARSPIKECONSTANT"); |
---|
| 354 | if (PropertyPointer) { |
---|
| 355 | prob_ss = |
---|
| 356 | PropertyPointer->GetProperty(thePhotonMomentum); |
---|
| 357 | } else { |
---|
| 358 | prob_ss = 0.0; |
---|
| 359 | } |
---|
| 360 | |
---|
| 361 | PropertyPointer = |
---|
| 362 | aMaterialPropertiesTable->GetProperty("BACKSCATTERCONSTANT"); |
---|
| 363 | if (PropertyPointer) { |
---|
| 364 | prob_bs = |
---|
| 365 | PropertyPointer->GetProperty(thePhotonMomentum); |
---|
| 366 | } else { |
---|
| 367 | prob_bs = 0.0; |
---|
| 368 | } |
---|
| 369 | } |
---|
| 370 | } |
---|
| 371 | else if (theFinish == polishedbackpainted || |
---|
| 372 | theFinish == groundbackpainted ) { |
---|
| 373 | aParticleChange.ProposeTrackStatus(fStopAndKill); |
---|
| 374 | return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep); |
---|
| 375 | } |
---|
| 376 | } |
---|
| 377 | |
---|
| 378 | if (type == dielectric_dielectric ) { |
---|
| 379 | if (theFinish == polished || theFinish == ground ) { |
---|
| 380 | |
---|
| 381 | if (Material1 == Material2){ |
---|
| 382 | theStatus = SameMaterial; |
---|
[1196] | 383 | if ( verboseLevel > 0) BoundaryProcessVerbose(); |
---|
[819] | 384 | return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep); |
---|
| 385 | } |
---|
| 386 | aMaterialPropertiesTable = |
---|
| 387 | Material2->GetMaterialPropertiesTable(); |
---|
| 388 | if (aMaterialPropertiesTable) |
---|
| 389 | Rindex = aMaterialPropertiesTable->GetProperty("RINDEX"); |
---|
| 390 | if (Rindex) { |
---|
| 391 | Rindex2 = Rindex->GetProperty(thePhotonMomentum); |
---|
| 392 | } |
---|
| 393 | else { |
---|
| 394 | theStatus = NoRINDEX; |
---|
[1196] | 395 | if ( verboseLevel > 0) BoundaryProcessVerbose(); |
---|
[819] | 396 | aParticleChange.ProposeTrackStatus(fStopAndKill); |
---|
| 397 | return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep); |
---|
| 398 | } |
---|
| 399 | } |
---|
| 400 | } |
---|
| 401 | |
---|
| 402 | if (type == dielectric_metal) { |
---|
| 403 | |
---|
| 404 | DielectricMetal(); |
---|
| 405 | |
---|
[963] | 406 | // Uncomment the following lines if you wish to have |
---|
| 407 | // Transmission instead of Absorption |
---|
| 408 | // if (theStatus == Absorption) { |
---|
| 409 | // return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep); |
---|
| 410 | // } |
---|
| 411 | |
---|
[819] | 412 | } |
---|
[1196] | 413 | else if (type == dielectric_LUT) { |
---|
| 414 | |
---|
| 415 | DielectricLUT(); |
---|
| 416 | |
---|
| 417 | } |
---|
[819] | 418 | else if (type == dielectric_dielectric) { |
---|
| 419 | |
---|
| 420 | if ( theFinish == polishedfrontpainted || |
---|
| 421 | theFinish == groundfrontpainted ) { |
---|
| 422 | if( !G4BooleanRand(theReflectivity) ) { |
---|
| 423 | DoAbsorption(); |
---|
| 424 | } |
---|
| 425 | else { |
---|
| 426 | if ( theFinish == groundfrontpainted ) |
---|
| 427 | theStatus = LambertianReflection; |
---|
| 428 | DoReflection(); |
---|
| 429 | } |
---|
| 430 | } |
---|
| 431 | else { |
---|
[1196] | 432 | if( !G4BooleanRand(theReflectivity) ) { |
---|
| 433 | DoAbsorption(); |
---|
| 434 | } |
---|
| 435 | else { |
---|
| 436 | DielectricDielectric(); |
---|
| 437 | } |
---|
[819] | 438 | } |
---|
| 439 | } |
---|
| 440 | else { |
---|
| 441 | |
---|
| 442 | G4cerr << " Error: G4BoundaryProcess: illegal boundary type " << G4endl; |
---|
| 443 | return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep); |
---|
| 444 | |
---|
| 445 | } |
---|
| 446 | |
---|
| 447 | NewMomentum = NewMomentum.unit(); |
---|
| 448 | NewPolarization = NewPolarization.unit(); |
---|
| 449 | |
---|
| 450 | if ( verboseLevel > 0) { |
---|
[1196] | 451 | G4cout << " New Momentum Direction: " << NewMomentum << G4endl; |
---|
| 452 | G4cout << " New Polarization: " << NewPolarization << G4endl; |
---|
| 453 | BoundaryProcessVerbose(); |
---|
[819] | 454 | } |
---|
| 455 | |
---|
| 456 | aParticleChange.ProposeMomentumDirection(NewMomentum); |
---|
| 457 | aParticleChange.ProposePolarization(NewPolarization); |
---|
| 458 | |
---|
| 459 | return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep); |
---|
| 460 | } |
---|
| 461 | |
---|
[1196] | 462 | void G4OpBoundaryProcess::BoundaryProcessVerbose() const |
---|
| 463 | { |
---|
| 464 | if ( theStatus == Undefined ) |
---|
| 465 | G4cout << " *** Undefined *** " << G4endl; |
---|
| 466 | if ( theStatus == FresnelRefraction ) |
---|
| 467 | G4cout << " *** FresnelRefraction *** " << G4endl; |
---|
| 468 | if ( theStatus == FresnelReflection ) |
---|
| 469 | G4cout << " *** FresnelReflection *** " << G4endl; |
---|
| 470 | if ( theStatus == TotalInternalReflection ) |
---|
| 471 | G4cout << " *** TotalInternalReflection *** " << G4endl; |
---|
| 472 | if ( theStatus == LambertianReflection ) |
---|
| 473 | G4cout << " *** LambertianReflection *** " << G4endl; |
---|
| 474 | if ( theStatus == LobeReflection ) |
---|
| 475 | G4cout << " *** LobeReflection *** " << G4endl; |
---|
| 476 | if ( theStatus == SpikeReflection ) |
---|
| 477 | G4cout << " *** SpikeReflection *** " << G4endl; |
---|
| 478 | if ( theStatus == BackScattering ) |
---|
| 479 | G4cout << " *** BackScattering *** " << G4endl; |
---|
| 480 | if ( theStatus == PolishedLumirrorAirReflection ) |
---|
| 481 | G4cout << " *** PolishedLumirrorAirReflection *** " << G4endl; |
---|
| 482 | if ( theStatus == PolishedLumirrorGlueReflection ) |
---|
| 483 | G4cout << " *** PolishedLumirrorGlueReflection *** " << G4endl; |
---|
| 484 | if ( theStatus == PolishedAirReflection ) |
---|
| 485 | G4cout << " *** PolishedAirReflection *** " << G4endl; |
---|
| 486 | if ( theStatus == PolishedTeflonAirReflection ) |
---|
| 487 | G4cout << " *** PolishedTeflonAirReflection *** " << G4endl; |
---|
| 488 | if ( theStatus == PolishedTiOAirReflection ) |
---|
| 489 | G4cout << " *** PolishedTiOAirReflection *** " << G4endl; |
---|
| 490 | if ( theStatus == PolishedTyvekAirReflection ) |
---|
| 491 | G4cout << " *** PolishedTyvekAirReflection *** " << G4endl; |
---|
| 492 | if ( theStatus == PolishedVM2000AirReflection ) |
---|
| 493 | G4cout << " *** PolishedVM2000AirReflection *** " << G4endl; |
---|
| 494 | if ( theStatus == PolishedVM2000GlueReflection ) |
---|
| 495 | G4cout << " *** PolishedVM2000GlueReflection *** " << G4endl; |
---|
| 496 | if ( theStatus == EtchedLumirrorAirReflection ) |
---|
| 497 | G4cout << " *** EtchedLumirrorAirReflection *** " << G4endl; |
---|
| 498 | if ( theStatus == EtchedLumirrorGlueReflection ) |
---|
| 499 | G4cout << " *** EtchedLumirrorGlueReflection *** " << G4endl; |
---|
| 500 | if ( theStatus == EtchedAirReflection ) |
---|
| 501 | G4cout << " *** EtchedAirReflection *** " << G4endl; |
---|
| 502 | if ( theStatus == EtchedTeflonAirReflection ) |
---|
| 503 | G4cout << " *** EtchedTeflonAirReflection *** " << G4endl; |
---|
| 504 | if ( theStatus == EtchedTiOAirReflection ) |
---|
| 505 | G4cout << " *** EtchedTiOAirReflection *** " << G4endl; |
---|
| 506 | if ( theStatus == EtchedTyvekAirReflection ) |
---|
| 507 | G4cout << " *** EtchedTyvekAirReflection *** " << G4endl; |
---|
| 508 | if ( theStatus == EtchedVM2000AirReflection ) |
---|
| 509 | G4cout << " *** EtchedVM2000AirReflection *** " << G4endl; |
---|
| 510 | if ( theStatus == EtchedVM2000GlueReflection ) |
---|
| 511 | G4cout << " *** EtchedVM2000GlueReflection *** " << G4endl; |
---|
| 512 | if ( theStatus == GroundLumirrorAirReflection ) |
---|
| 513 | G4cout << " *** GroundLumirrorAirReflection *** " << G4endl; |
---|
| 514 | if ( theStatus == GroundLumirrorGlueReflection ) |
---|
| 515 | G4cout << " *** GroundLumirrorGlueReflection *** " << G4endl; |
---|
| 516 | if ( theStatus == GroundAirReflection ) |
---|
| 517 | G4cout << " *** GroundAirReflection *** " << G4endl; |
---|
| 518 | if ( theStatus == GroundTeflonAirReflection ) |
---|
| 519 | G4cout << " *** GroundTeflonAirReflection *** " << G4endl; |
---|
| 520 | if ( theStatus == GroundTiOAirReflection ) |
---|
| 521 | G4cout << " *** GroundTiOAirReflection *** " << G4endl; |
---|
| 522 | if ( theStatus == GroundTyvekAirReflection ) |
---|
| 523 | G4cout << " *** GroundTyvekAirReflection *** " << G4endl; |
---|
| 524 | if ( theStatus == GroundVM2000AirReflection ) |
---|
| 525 | G4cout << " *** GroundVM2000AirReflection *** " << G4endl; |
---|
| 526 | if ( theStatus == GroundVM2000GlueReflection ) |
---|
| 527 | G4cout << " *** GroundVM2000GlueReflection *** " << G4endl; |
---|
| 528 | if ( theStatus == Absorption ) |
---|
| 529 | G4cout << " *** Absorption *** " << G4endl; |
---|
| 530 | if ( theStatus == Detection ) |
---|
| 531 | G4cout << " *** Detection *** " << G4endl; |
---|
| 532 | if ( theStatus == NotAtBoundary ) |
---|
| 533 | G4cout << " *** NotAtBoundary *** " << G4endl; |
---|
| 534 | if ( theStatus == SameMaterial ) |
---|
| 535 | G4cout << " *** SameMaterial *** " << G4endl; |
---|
| 536 | if ( theStatus == StepTooSmall ) |
---|
| 537 | G4cout << " *** StepTooSmall *** " << G4endl; |
---|
| 538 | if ( theStatus == NoRINDEX ) |
---|
| 539 | G4cout << " *** NoRINDEX *** " << G4endl; |
---|
| 540 | } |
---|
| 541 | |
---|
[819] | 542 | G4ThreeVector |
---|
| 543 | G4OpBoundaryProcess::GetFacetNormal(const G4ThreeVector& Momentum, |
---|
| 544 | const G4ThreeVector& Normal ) const |
---|
| 545 | { |
---|
| 546 | G4ThreeVector FacetNormal; |
---|
| 547 | |
---|
[1196] | 548 | if (theModel == unified || theModel == LUT) { |
---|
[819] | 549 | |
---|
| 550 | /* This function code alpha to a random value taken from the |
---|
| 551 | distribution p(alpha) = g(alpha; 0, sigma_alpha)*std::sin(alpha), |
---|
| 552 | for alpha > 0 and alpha < 90, where g(alpha; 0, sigma_alpha) |
---|
| 553 | is a gaussian distribution with mean 0 and standard deviation |
---|
| 554 | sigma_alpha. */ |
---|
| 555 | |
---|
| 556 | G4double alpha; |
---|
| 557 | |
---|
| 558 | G4double sigma_alpha = 0.0; |
---|
| 559 | if (OpticalSurface) sigma_alpha = OpticalSurface->GetSigmaAlpha(); |
---|
| 560 | |
---|
| 561 | G4double f_max = std::min(1.0,4.*sigma_alpha); |
---|
| 562 | |
---|
| 563 | do { |
---|
| 564 | do { |
---|
| 565 | alpha = G4RandGauss::shoot(0.0,sigma_alpha); |
---|
| 566 | } while (G4UniformRand()*f_max > std::sin(alpha) || alpha >= halfpi ); |
---|
| 567 | |
---|
| 568 | G4double phi = G4UniformRand()*twopi; |
---|
| 569 | |
---|
| 570 | G4double SinAlpha = std::sin(alpha); |
---|
| 571 | G4double CosAlpha = std::cos(alpha); |
---|
| 572 | G4double SinPhi = std::sin(phi); |
---|
| 573 | G4double CosPhi = std::cos(phi); |
---|
| 574 | |
---|
| 575 | G4double unit_x = SinAlpha * CosPhi; |
---|
| 576 | G4double unit_y = SinAlpha * SinPhi; |
---|
| 577 | G4double unit_z = CosAlpha; |
---|
| 578 | |
---|
| 579 | FacetNormal.setX(unit_x); |
---|
| 580 | FacetNormal.setY(unit_y); |
---|
| 581 | FacetNormal.setZ(unit_z); |
---|
| 582 | |
---|
| 583 | G4ThreeVector tmpNormal = Normal; |
---|
| 584 | |
---|
| 585 | FacetNormal.rotateUz(tmpNormal); |
---|
| 586 | } while (Momentum * FacetNormal >= 0.0); |
---|
| 587 | } |
---|
| 588 | else { |
---|
| 589 | |
---|
| 590 | G4double polish = 1.0; |
---|
| 591 | if (OpticalSurface) polish = OpticalSurface->GetPolish(); |
---|
| 592 | |
---|
| 593 | if (polish < 1.0) { |
---|
| 594 | do { |
---|
| 595 | G4ThreeVector smear; |
---|
| 596 | do { |
---|
| 597 | smear.setX(2.*G4UniformRand()-1.0); |
---|
| 598 | smear.setY(2.*G4UniformRand()-1.0); |
---|
| 599 | smear.setZ(2.*G4UniformRand()-1.0); |
---|
| 600 | } while (smear.mag()>1.0); |
---|
| 601 | smear = (1.-polish) * smear; |
---|
| 602 | FacetNormal = Normal + smear; |
---|
| 603 | } while (Momentum * FacetNormal >= 0.0); |
---|
| 604 | FacetNormal = FacetNormal.unit(); |
---|
| 605 | } |
---|
| 606 | else { |
---|
| 607 | FacetNormal = Normal; |
---|
| 608 | } |
---|
| 609 | } |
---|
| 610 | return FacetNormal; |
---|
| 611 | } |
---|
| 612 | |
---|
| 613 | void G4OpBoundaryProcess::DielectricMetal() |
---|
| 614 | { |
---|
| 615 | G4int n = 0; |
---|
| 616 | |
---|
| 617 | do { |
---|
| 618 | |
---|
| 619 | n++; |
---|
| 620 | |
---|
| 621 | if( !G4BooleanRand(theReflectivity) && n == 1 ) { |
---|
| 622 | |
---|
[1055] | 623 | // Comment out DoAbsorption and uncomment theStatus = Absorption; |
---|
| 624 | // if you wish to have Transmission instead of Absorption |
---|
[963] | 625 | |
---|
[819] | 626 | DoAbsorption(); |
---|
[1055] | 627 | // theStatus = Absorption; |
---|
[819] | 628 | break; |
---|
| 629 | |
---|
| 630 | } |
---|
| 631 | else { |
---|
| 632 | |
---|
[1055] | 633 | if (PropertyPointer1 && PropertyPointer2) { |
---|
| 634 | if ( n > 1 ) { |
---|
| 635 | CalculateReflectivity(); |
---|
| 636 | if ( !G4BooleanRand(theReflectivity) ) { |
---|
| 637 | DoAbsorption(); |
---|
| 638 | break; |
---|
| 639 | } |
---|
| 640 | } |
---|
| 641 | } |
---|
| 642 | |
---|
[819] | 643 | if ( theModel == glisur || theFinish == polished ) { |
---|
| 644 | |
---|
| 645 | DoReflection(); |
---|
| 646 | |
---|
| 647 | } else { |
---|
| 648 | |
---|
| 649 | if ( n == 1 ) ChooseReflection(); |
---|
| 650 | |
---|
| 651 | if ( theStatus == LambertianReflection ) { |
---|
| 652 | DoReflection(); |
---|
| 653 | } |
---|
| 654 | else if ( theStatus == BackScattering ) { |
---|
| 655 | NewMomentum = -OldMomentum; |
---|
| 656 | NewPolarization = -OldPolarization; |
---|
| 657 | } |
---|
| 658 | else { |
---|
| 659 | |
---|
[1055] | 660 | if(theStatus==LobeReflection){ |
---|
| 661 | if ( PropertyPointer1 && PropertyPointer2 ){ |
---|
| 662 | } else { |
---|
| 663 | theFacetNormal = |
---|
| 664 | GetFacetNormal(OldMomentum,theGlobalNormal); |
---|
| 665 | } |
---|
| 666 | } |
---|
[819] | 667 | |
---|
| 668 | G4double PdotN = OldMomentum * theFacetNormal; |
---|
| 669 | NewMomentum = OldMomentum - (2.*PdotN)*theFacetNormal; |
---|
| 670 | G4double EdotN = OldPolarization * theFacetNormal; |
---|
| 671 | |
---|
| 672 | G4ThreeVector A_trans, A_paral; |
---|
| 673 | |
---|
| 674 | if (sint1 > 0.0 ) { |
---|
| 675 | A_trans = OldMomentum.cross(theFacetNormal); |
---|
| 676 | A_trans = A_trans.unit(); |
---|
| 677 | } else { |
---|
| 678 | A_trans = OldPolarization; |
---|
| 679 | } |
---|
| 680 | A_paral = NewMomentum.cross(A_trans); |
---|
| 681 | A_paral = A_paral.unit(); |
---|
| 682 | |
---|
| 683 | if(iTE>0&&iTM>0) { |
---|
| 684 | NewPolarization = |
---|
| 685 | -OldPolarization + (2.*EdotN)*theFacetNormal; |
---|
| 686 | } else if (iTE>0) { |
---|
| 687 | NewPolarization = -A_trans; |
---|
| 688 | } else if (iTM>0) { |
---|
| 689 | NewPolarization = -A_paral; |
---|
| 690 | } |
---|
| 691 | |
---|
| 692 | } |
---|
| 693 | |
---|
| 694 | } |
---|
| 695 | |
---|
| 696 | OldMomentum = NewMomentum; |
---|
| 697 | OldPolarization = NewPolarization; |
---|
| 698 | |
---|
| 699 | } |
---|
| 700 | |
---|
| 701 | } while (NewMomentum * theGlobalNormal < 0.0); |
---|
| 702 | } |
---|
| 703 | |
---|
[1196] | 704 | void G4OpBoundaryProcess::DielectricLUT() |
---|
| 705 | { |
---|
| 706 | G4int thetaIndex, phiIndex; |
---|
| 707 | G4double AngularDistributionValue, thetaRad, phiRad, EdotN; |
---|
| 708 | G4ThreeVector PerpendicularVectorTheta, PerpendicularVectorPhi; |
---|
| 709 | |
---|
| 710 | theStatus = G4OpBoundaryProcessStatus(G4int(theFinish) + |
---|
| 711 | (G4int(NoRINDEX)-G4int(groundbackpainted))); |
---|
| 712 | |
---|
| 713 | G4int thetaIndexMax = OpticalSurface->GetThetaIndexMax(); |
---|
| 714 | G4int phiIndexMax = OpticalSurface->GetPhiIndexMax(); |
---|
| 715 | |
---|
| 716 | do { |
---|
| 717 | if ( !G4BooleanRand(theReflectivity) ) // Not reflected, so Absorbed |
---|
| 718 | DoAbsorption(); |
---|
| 719 | else { |
---|
| 720 | // Calculate Angle between Normal and Photon Momentum |
---|
| 721 | G4double anglePhotonToNormal = |
---|
| 722 | OldMomentum.angle(-theGlobalNormal); |
---|
| 723 | // Round it to closest integer |
---|
[1228] | 724 | G4int angleIncident = G4int(std::floor(180/pi*anglePhotonToNormal+0.5)); |
---|
[1196] | 725 | |
---|
| 726 | // Take random angles THETA and PHI, |
---|
| 727 | // and see if below Probability - if not - Redo |
---|
| 728 | do { |
---|
| 729 | thetaIndex = CLHEP::RandFlat::shootInt(thetaIndexMax-1); |
---|
| 730 | phiIndex = CLHEP::RandFlat::shootInt(phiIndexMax-1); |
---|
| 731 | // Find probability with the new indeces from LUT |
---|
| 732 | AngularDistributionValue = OpticalSurface -> |
---|
| 733 | GetAngularDistributionValue(angleIncident, |
---|
| 734 | thetaIndex, |
---|
| 735 | phiIndex); |
---|
| 736 | } while ( !G4BooleanRand(AngularDistributionValue) ); |
---|
| 737 | |
---|
| 738 | thetaRad = (-90 + 4*thetaIndex)*pi/180; |
---|
| 739 | phiRad = (-90 + 5*phiIndex)*pi/180; |
---|
| 740 | // Rotate Photon Momentum in Theta, then in Phi |
---|
| 741 | NewMomentum = -OldMomentum; |
---|
| 742 | PerpendicularVectorTheta = NewMomentum.cross(theGlobalNormal); |
---|
| 743 | if (PerpendicularVectorTheta.mag() > kCarTolerance ) { |
---|
| 744 | PerpendicularVectorPhi = |
---|
| 745 | PerpendicularVectorTheta.cross(NewMomentum); |
---|
| 746 | } |
---|
| 747 | else { |
---|
| 748 | PerpendicularVectorTheta = NewMomentum.orthogonal(); |
---|
| 749 | PerpendicularVectorPhi = |
---|
| 750 | PerpendicularVectorTheta.cross(NewMomentum); |
---|
| 751 | } |
---|
| 752 | NewMomentum = |
---|
| 753 | NewMomentum.rotate(anglePhotonToNormal-thetaRad, |
---|
| 754 | PerpendicularVectorTheta); |
---|
| 755 | NewMomentum = NewMomentum.rotate(-phiRad,PerpendicularVectorPhi); |
---|
| 756 | // Rotate Polarization too: |
---|
| 757 | theFacetNormal = (NewMomentum - OldMomentum).unit(); |
---|
| 758 | EdotN = OldPolarization * theFacetNormal; |
---|
| 759 | NewPolarization = -OldPolarization + (2.*EdotN)*theFacetNormal; |
---|
| 760 | } |
---|
| 761 | } while (NewMomentum * theGlobalNormal <= 0.0); |
---|
| 762 | } |
---|
| 763 | |
---|
[819] | 764 | void G4OpBoundaryProcess::DielectricDielectric() |
---|
| 765 | { |
---|
| 766 | G4bool Inside = false; |
---|
| 767 | G4bool Swap = false; |
---|
| 768 | |
---|
| 769 | leap: |
---|
| 770 | |
---|
| 771 | G4bool Through = false; |
---|
| 772 | G4bool Done = false; |
---|
| 773 | |
---|
| 774 | do { |
---|
| 775 | |
---|
| 776 | if (Through) { |
---|
| 777 | Swap = !Swap; |
---|
| 778 | Through = false; |
---|
| 779 | theGlobalNormal = -theGlobalNormal; |
---|
[963] | 780 | G4SwapPtr(Material1,Material2); |
---|
| 781 | G4SwapObj(&Rindex1,&Rindex2); |
---|
[819] | 782 | } |
---|
| 783 | |
---|
| 784 | if ( theFinish == ground || theFinish == groundbackpainted ) { |
---|
| 785 | theFacetNormal = |
---|
| 786 | GetFacetNormal(OldMomentum,theGlobalNormal); |
---|
| 787 | } |
---|
| 788 | else { |
---|
| 789 | theFacetNormal = theGlobalNormal; |
---|
| 790 | } |
---|
| 791 | |
---|
| 792 | G4double PdotN = OldMomentum * theFacetNormal; |
---|
| 793 | G4double EdotN = OldPolarization * theFacetNormal; |
---|
| 794 | |
---|
| 795 | cost1 = - PdotN; |
---|
| 796 | if (std::abs(cost1) < 1.0-kCarTolerance){ |
---|
| 797 | sint1 = std::sqrt(1.-cost1*cost1); |
---|
| 798 | sint2 = sint1*Rindex1/Rindex2; // *** Snell's Law *** |
---|
| 799 | } |
---|
| 800 | else { |
---|
| 801 | sint1 = 0.0; |
---|
| 802 | sint2 = 0.0; |
---|
| 803 | } |
---|
| 804 | |
---|
| 805 | if (sint2 >= 1.0) { |
---|
| 806 | |
---|
| 807 | // Simulate total internal reflection |
---|
| 808 | |
---|
| 809 | if (Swap) Swap = !Swap; |
---|
| 810 | |
---|
| 811 | theStatus = TotalInternalReflection; |
---|
| 812 | |
---|
| 813 | if ( theModel == unified && theFinish != polished ) |
---|
| 814 | ChooseReflection(); |
---|
| 815 | |
---|
| 816 | if ( theStatus == LambertianReflection ) { |
---|
| 817 | DoReflection(); |
---|
| 818 | } |
---|
| 819 | else if ( theStatus == BackScattering ) { |
---|
| 820 | NewMomentum = -OldMomentum; |
---|
| 821 | NewPolarization = -OldPolarization; |
---|
| 822 | } |
---|
| 823 | else { |
---|
| 824 | |
---|
| 825 | PdotN = OldMomentum * theFacetNormal; |
---|
| 826 | NewMomentum = OldMomentum - (2.*PdotN)*theFacetNormal; |
---|
| 827 | EdotN = OldPolarization * theFacetNormal; |
---|
| 828 | NewPolarization = -OldPolarization + (2.*EdotN)*theFacetNormal; |
---|
| 829 | |
---|
| 830 | } |
---|
| 831 | } |
---|
| 832 | else if (sint2 < 1.0) { |
---|
| 833 | |
---|
| 834 | // Calculate amplitude for transmission (Q = P x N) |
---|
| 835 | |
---|
| 836 | if (cost1 > 0.0) { |
---|
| 837 | cost2 = std::sqrt(1.-sint2*sint2); |
---|
| 838 | } |
---|
| 839 | else { |
---|
| 840 | cost2 = -std::sqrt(1.-sint2*sint2); |
---|
| 841 | } |
---|
| 842 | |
---|
| 843 | G4ThreeVector A_trans, A_paral, E1pp, E1pl; |
---|
| 844 | G4double E1_perp, E1_parl; |
---|
| 845 | |
---|
| 846 | if (sint1 > 0.0) { |
---|
| 847 | A_trans = OldMomentum.cross(theFacetNormal); |
---|
| 848 | A_trans = A_trans.unit(); |
---|
| 849 | E1_perp = OldPolarization * A_trans; |
---|
| 850 | E1pp = E1_perp * A_trans; |
---|
| 851 | E1pl = OldPolarization - E1pp; |
---|
| 852 | E1_parl = E1pl.mag(); |
---|
| 853 | } |
---|
| 854 | else { |
---|
| 855 | A_trans = OldPolarization; |
---|
| 856 | // Here we Follow Jackson's conventions and we set the |
---|
| 857 | // parallel component = 1 in case of a ray perpendicular |
---|
| 858 | // to the surface |
---|
| 859 | E1_perp = 0.0; |
---|
| 860 | E1_parl = 1.0; |
---|
| 861 | } |
---|
| 862 | |
---|
| 863 | G4double s1 = Rindex1*cost1; |
---|
| 864 | G4double E2_perp = 2.*s1*E1_perp/(Rindex1*cost1+Rindex2*cost2); |
---|
| 865 | G4double E2_parl = 2.*s1*E1_parl/(Rindex2*cost1+Rindex1*cost2); |
---|
| 866 | G4double E2_total = E2_perp*E2_perp + E2_parl*E2_parl; |
---|
| 867 | G4double s2 = Rindex2*cost2*E2_total; |
---|
| 868 | |
---|
| 869 | G4double TransCoeff; |
---|
| 870 | |
---|
| 871 | if (cost1 != 0.0) { |
---|
| 872 | TransCoeff = s2/s1; |
---|
| 873 | } |
---|
| 874 | else { |
---|
| 875 | TransCoeff = 0.0; |
---|
| 876 | } |
---|
| 877 | |
---|
| 878 | G4double E2_abs, C_parl, C_perp; |
---|
| 879 | |
---|
| 880 | if ( !G4BooleanRand(TransCoeff) ) { |
---|
| 881 | |
---|
| 882 | // Simulate reflection |
---|
| 883 | |
---|
| 884 | if (Swap) Swap = !Swap; |
---|
| 885 | |
---|
| 886 | theStatus = FresnelReflection; |
---|
| 887 | |
---|
| 888 | if ( theModel == unified && theFinish != polished ) |
---|
| 889 | ChooseReflection(); |
---|
| 890 | |
---|
| 891 | if ( theStatus == LambertianReflection ) { |
---|
| 892 | DoReflection(); |
---|
| 893 | } |
---|
| 894 | else if ( theStatus == BackScattering ) { |
---|
| 895 | NewMomentum = -OldMomentum; |
---|
| 896 | NewPolarization = -OldPolarization; |
---|
| 897 | } |
---|
| 898 | else { |
---|
| 899 | |
---|
| 900 | PdotN = OldMomentum * theFacetNormal; |
---|
| 901 | NewMomentum = OldMomentum - (2.*PdotN)*theFacetNormal; |
---|
| 902 | |
---|
| 903 | if (sint1 > 0.0) { // incident ray oblique |
---|
| 904 | |
---|
| 905 | E2_parl = Rindex2*E2_parl/Rindex1 - E1_parl; |
---|
| 906 | E2_perp = E2_perp - E1_perp; |
---|
| 907 | E2_total = E2_perp*E2_perp + E2_parl*E2_parl; |
---|
| 908 | A_paral = NewMomentum.cross(A_trans); |
---|
| 909 | A_paral = A_paral.unit(); |
---|
| 910 | E2_abs = std::sqrt(E2_total); |
---|
| 911 | C_parl = E2_parl/E2_abs; |
---|
| 912 | C_perp = E2_perp/E2_abs; |
---|
| 913 | |
---|
| 914 | NewPolarization = C_parl*A_paral + C_perp*A_trans; |
---|
| 915 | |
---|
| 916 | } |
---|
| 917 | |
---|
| 918 | else { // incident ray perpendicular |
---|
| 919 | |
---|
| 920 | if (Rindex2 > Rindex1) { |
---|
| 921 | NewPolarization = - OldPolarization; |
---|
| 922 | } |
---|
| 923 | else { |
---|
| 924 | NewPolarization = OldPolarization; |
---|
| 925 | } |
---|
| 926 | |
---|
| 927 | } |
---|
| 928 | } |
---|
| 929 | } |
---|
| 930 | else { // photon gets transmitted |
---|
| 931 | |
---|
| 932 | // Simulate transmission/refraction |
---|
| 933 | |
---|
| 934 | Inside = !Inside; |
---|
| 935 | Through = true; |
---|
| 936 | theStatus = FresnelRefraction; |
---|
| 937 | |
---|
| 938 | if (sint1 > 0.0) { // incident ray oblique |
---|
| 939 | |
---|
| 940 | G4double alpha = cost1 - cost2*(Rindex2/Rindex1); |
---|
| 941 | NewMomentum = OldMomentum + alpha*theFacetNormal; |
---|
| 942 | NewMomentum = NewMomentum.unit(); |
---|
| 943 | PdotN = -cost2; |
---|
| 944 | A_paral = NewMomentum.cross(A_trans); |
---|
| 945 | A_paral = A_paral.unit(); |
---|
| 946 | E2_abs = std::sqrt(E2_total); |
---|
| 947 | C_parl = E2_parl/E2_abs; |
---|
| 948 | C_perp = E2_perp/E2_abs; |
---|
| 949 | |
---|
| 950 | NewPolarization = C_parl*A_paral + C_perp*A_trans; |
---|
| 951 | |
---|
| 952 | } |
---|
| 953 | else { // incident ray perpendicular |
---|
| 954 | |
---|
| 955 | NewMomentum = OldMomentum; |
---|
| 956 | NewPolarization = OldPolarization; |
---|
| 957 | |
---|
| 958 | } |
---|
| 959 | } |
---|
| 960 | } |
---|
| 961 | |
---|
| 962 | OldMomentum = NewMomentum.unit(); |
---|
| 963 | OldPolarization = NewPolarization.unit(); |
---|
| 964 | |
---|
| 965 | if (theStatus == FresnelRefraction) { |
---|
| 966 | Done = (NewMomentum * theGlobalNormal <= 0.0); |
---|
| 967 | } |
---|
| 968 | else { |
---|
| 969 | Done = (NewMomentum * theGlobalNormal >= 0.0); |
---|
| 970 | } |
---|
| 971 | |
---|
| 972 | } while (!Done); |
---|
| 973 | |
---|
| 974 | if (Inside && !Swap) { |
---|
| 975 | if( theFinish == polishedbackpainted || |
---|
| 976 | theFinish == groundbackpainted ) { |
---|
| 977 | |
---|
| 978 | if( !G4BooleanRand(theReflectivity) ) { |
---|
| 979 | DoAbsorption(); |
---|
| 980 | } |
---|
| 981 | else { |
---|
| 982 | if (theStatus != FresnelRefraction ) { |
---|
| 983 | theGlobalNormal = -theGlobalNormal; |
---|
| 984 | } |
---|
| 985 | else { |
---|
| 986 | Swap = !Swap; |
---|
[963] | 987 | G4SwapPtr(Material1,Material2); |
---|
| 988 | G4SwapObj(&Rindex1,&Rindex2); |
---|
[819] | 989 | } |
---|
| 990 | if ( theFinish == groundbackpainted ) |
---|
| 991 | theStatus = LambertianReflection; |
---|
| 992 | |
---|
| 993 | DoReflection(); |
---|
| 994 | |
---|
| 995 | theGlobalNormal = -theGlobalNormal; |
---|
| 996 | OldMomentum = NewMomentum; |
---|
| 997 | |
---|
| 998 | goto leap; |
---|
| 999 | } |
---|
| 1000 | } |
---|
| 1001 | } |
---|
| 1002 | } |
---|
| 1003 | |
---|
| 1004 | // GetMeanFreePath |
---|
| 1005 | // --------------- |
---|
| 1006 | // |
---|
| 1007 | G4double G4OpBoundaryProcess::GetMeanFreePath(const G4Track& , |
---|
| 1008 | G4double , |
---|
| 1009 | G4ForceCondition* condition) |
---|
| 1010 | { |
---|
| 1011 | *condition = Forced; |
---|
| 1012 | |
---|
| 1013 | return DBL_MAX; |
---|
| 1014 | } |
---|
| 1015 | |
---|
| 1016 | G4double G4OpBoundaryProcess::GetIncidentAngle() |
---|
| 1017 | { |
---|
| 1018 | G4double PdotN = OldMomentum * theFacetNormal; |
---|
| 1019 | G4double magP= OldMomentum.mag(); |
---|
| 1020 | G4double magN= theFacetNormal.mag(); |
---|
| 1021 | G4double incidentangle = pi - std::acos(PdotN/(magP*magN)); |
---|
| 1022 | |
---|
| 1023 | return incidentangle; |
---|
| 1024 | } |
---|
| 1025 | |
---|
| 1026 | G4double G4OpBoundaryProcess::GetReflectivity(G4double E1_perp, |
---|
| 1027 | G4double E1_parl, |
---|
| 1028 | G4double incidentangle, |
---|
| 1029 | G4double RealRindex, |
---|
| 1030 | G4double ImaginaryRindex) |
---|
| 1031 | { |
---|
| 1032 | |
---|
| 1033 | G4complex Reflectivity, Reflectivity_TE, Reflectivity_TM; |
---|
| 1034 | G4complex N(RealRindex, ImaginaryRindex); |
---|
| 1035 | G4complex CosPhi; |
---|
| 1036 | |
---|
| 1037 | G4complex u(1,0); //unit number 1 |
---|
| 1038 | |
---|
| 1039 | G4complex numeratorTE; // E1_perp=1 E1_parl=0 -> TE polarization |
---|
| 1040 | G4complex numeratorTM; // E1_parl=1 E1_perp=0 -> TM polarization |
---|
| 1041 | G4complex denominatorTE, denominatorTM; |
---|
| 1042 | G4complex rTM, rTE; |
---|
| 1043 | |
---|
| 1044 | // Following two equations, rTM and rTE, are from: "Introduction To Modern |
---|
| 1045 | // Optics" written by Fowles |
---|
| 1046 | |
---|
| 1047 | CosPhi=std::sqrt(u-((std::sin(incidentangle)*std::sin(incidentangle))/(N*N))); |
---|
| 1048 | |
---|
| 1049 | numeratorTE = std::cos(incidentangle) - N*CosPhi; |
---|
| 1050 | denominatorTE = std::cos(incidentangle) + N*CosPhi; |
---|
| 1051 | rTE = numeratorTE/denominatorTE; |
---|
| 1052 | |
---|
| 1053 | numeratorTM = N*std::cos(incidentangle) - CosPhi; |
---|
| 1054 | denominatorTM = N*std::cos(incidentangle) + CosPhi; |
---|
| 1055 | rTM = numeratorTM/denominatorTM; |
---|
| 1056 | |
---|
| 1057 | // This is my calculaton for reflectivity on a metalic surface |
---|
| 1058 | // depending on the fraction of TE and TM polarization |
---|
| 1059 | // when TE polarization, E1_parl=0 and E1_perp=1, R=abs(rTE)^2 and |
---|
| 1060 | // when TM polarization, E1_parl=1 and E1_perp=0, R=abs(rTM)^2 |
---|
| 1061 | |
---|
| 1062 | Reflectivity_TE = (rTE*conj(rTE))*(E1_perp*E1_perp) |
---|
| 1063 | / (E1_perp*E1_perp + E1_parl*E1_parl); |
---|
| 1064 | Reflectivity_TM = (rTM*conj(rTM))*(E1_parl*E1_parl) |
---|
| 1065 | / (E1_perp*E1_perp + E1_parl*E1_parl); |
---|
| 1066 | Reflectivity = Reflectivity_TE + Reflectivity_TM; |
---|
| 1067 | |
---|
| 1068 | do { |
---|
[1055] | 1069 | if(G4UniformRand()*real(Reflectivity) > real(Reflectivity_TE)) |
---|
| 1070 | {iTE = -1;}else{iTE = 1;} |
---|
| 1071 | if(G4UniformRand()*real(Reflectivity) > real(Reflectivity_TM)) |
---|
| 1072 | {iTM = -1;}else{iTM = 1;} |
---|
[819] | 1073 | } while(iTE<0&&iTM<0); |
---|
| 1074 | |
---|
| 1075 | return real(Reflectivity); |
---|
| 1076 | |
---|
| 1077 | } |
---|
[1055] | 1078 | |
---|
| 1079 | void G4OpBoundaryProcess::CalculateReflectivity() |
---|
| 1080 | { |
---|
| 1081 | G4double RealRindex = |
---|
| 1082 | PropertyPointer1->GetProperty(thePhotonMomentum); |
---|
| 1083 | G4double ImaginaryRindex = |
---|
| 1084 | PropertyPointer2->GetProperty(thePhotonMomentum); |
---|
| 1085 | |
---|
| 1086 | // calculate FacetNormal |
---|
| 1087 | if ( theFinish == ground ) { |
---|
| 1088 | theFacetNormal = |
---|
| 1089 | GetFacetNormal(OldMomentum, theGlobalNormal); |
---|
| 1090 | } else { |
---|
| 1091 | theFacetNormal = theGlobalNormal; |
---|
| 1092 | } |
---|
| 1093 | |
---|
| 1094 | G4double PdotN = OldMomentum * theFacetNormal; |
---|
| 1095 | cost1 = -PdotN; |
---|
| 1096 | |
---|
| 1097 | if (std::abs(cost1) < 1.0 - kCarTolerance) { |
---|
| 1098 | sint1 = std::sqrt(1. - cost1*cost1); |
---|
| 1099 | } else { |
---|
| 1100 | sint1 = 0.0; |
---|
| 1101 | } |
---|
| 1102 | |
---|
| 1103 | G4ThreeVector A_trans, A_paral, E1pp, E1pl; |
---|
| 1104 | G4double E1_perp, E1_parl; |
---|
| 1105 | |
---|
| 1106 | if (sint1 > 0.0 ) { |
---|
| 1107 | A_trans = OldMomentum.cross(theFacetNormal); |
---|
| 1108 | A_trans = A_trans.unit(); |
---|
| 1109 | E1_perp = OldPolarization * A_trans; |
---|
| 1110 | E1pp = E1_perp * A_trans; |
---|
| 1111 | E1pl = OldPolarization - E1pp; |
---|
| 1112 | E1_parl = E1pl.mag(); |
---|
| 1113 | } |
---|
| 1114 | else { |
---|
| 1115 | A_trans = OldPolarization; |
---|
| 1116 | // Here we Follow Jackson's conventions and we set the |
---|
| 1117 | // parallel component = 1 in case of a ray perpendicular |
---|
| 1118 | // to the surface |
---|
| 1119 | E1_perp = 0.0; |
---|
| 1120 | E1_parl = 1.0; |
---|
| 1121 | } |
---|
| 1122 | |
---|
| 1123 | //calculate incident angle |
---|
| 1124 | G4double incidentangle = GetIncidentAngle(); |
---|
| 1125 | |
---|
| 1126 | //calculate the reflectivity depending on incident angle, |
---|
| 1127 | //polarization and complex refractive |
---|
| 1128 | |
---|
| 1129 | theReflectivity = |
---|
| 1130 | GetReflectivity(E1_perp, E1_parl, incidentangle, |
---|
| 1131 | RealRindex, ImaginaryRindex); |
---|
| 1132 | } |
---|