| | 1 | /************************************************************************** |
| | 2 | * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * |
| | 3 | * * |
| | 4 | * Author: The ALICE Off-line Project. * |
| | 5 | * Contributors are mentioned in the code where appropriate. * |
| | 6 | * * |
| | 7 | * Permission to use, copy, modify and distribute this software and its * |
| | 8 | * documentation strictly for non-commercial purposes is hereby granted * |
| | 9 | * without fee, provided that the above copyright notice appears in all * |
| | 10 | * copies and that both the copyright notice and this permission notice * |
| | 11 | * appear in the supporting documentation. The authors make no claims * |
| | 12 | * about the suitability of this software for any purpose. It is * |
| | 13 | * provided "as is" without express or implied warranty. * |
| | 14 | **************************************************************************/ |
| | 15 | |
| | 16 | /* $Id$ */ |
| | 17 | |
| | 18 | //_________________________________________________________________________ |
| | 19 | // Implementation version v1 of PHOS Manager class |
| | 20 | //--- |
| | 21 | // Layout EMC + PPSD has name GPS2: |
| | 22 | // Produces cumulated hits |
| | 23 | //--- |
| | 24 | // Layout EMC + CPV has name IHEP: |
| | 25 | // Produces hits for CPV, cumulated hits |
| | 26 | //--- |
| | 27 | // Layout EMC + CPV + PPSD has name GPS: |
| | 28 | // Produces hits for CPV, cumulated hits |
| | 29 | //--- |
| | 30 | //*-- Author: Yves Schutz (SUBATECH) |
| | 31 | |
| | 32 | |
| | 33 | // --- ROOT system --- |
| | 34 | |
| | 35 | #include "TBRIK.h" |
| | 36 | #include "TNode.h" |
| | 37 | #include "TRandom.h" |
| | 38 | #include "TTree.h" |
| | 39 | |
| | 40 | |
| | 41 | // --- Standard library --- |
| | 42 | |
| | 43 | #include <stdio.h> |
| | 44 | #include <string.h> |
| | 45 | #include <stdlib.h> |
| | 46 | #include <strstream.h> |
| | 47 | |
| | 48 | // --- AliRoot header files --- |
| | 49 | |
| | 50 | #include "AliPHOSv1.h" |
| | 51 | #include "AliPHOSHit.h" |
| | 52 | #include "AliPHOSDigit.h" |
| | 53 | #include "AliPHOSReconstructioner.h" |
| | 54 | #include "AliRun.h" |
| | 55 | #include "AliConst.h" |
| | 56 | #include "AliMC.h" |
| | 57 | |
| | 58 | ClassImp(AliPHOSv1) |
| | 59 | |
| | 60 | //____________________________________________________________________________ |
| | 61 | AliPHOSv1::AliPHOSv1() |
| | 62 | { |
| | 63 | // ctor |
| | 64 | |
| | 65 | // Create an empty array of AliPHOSCPVModule to satisfy |
| | 66 | // AliPHOSv1::Streamer when reading root file |
| | 67 | |
| | 68 | fReconstructioner = 0; |
| | 69 | fTrackSegmentMaker = 0; |
| | 70 | |
| | 71 | if ( 0==(fEMCModules=new TClonesArray("AliPHOSCPVModule",0)) ) { |
| | 72 | Error("AliPHOSv1","Can not create array of EMC modules"); |
| | 73 | exit(1); |
| | 74 | } |
| | 75 | |
| | 76 | if ( 0==(fCPVModules=new TClonesArray("AliPHOSCPVModule",0)) ) { |
| | 77 | Error("AliPHOSv1","Can not create array of CPV modules"); |
| | 78 | exit(1); |
| | 79 | } |
| | 80 | |
| | 81 | } |
| | 82 | |
| | 83 | //____________________________________________________________________________ |
| | 84 | AliPHOSv1::AliPHOSv1(const char *name, const char *title): |
| | 85 | AliPHOSv0(name,title) |
| | 86 | { |
| | 87 | // ctor : title is used to identify the layout |
| | 88 | // GPS2 = 5 modules (EMC + PPSD) |
| | 89 | // IHEP = 5 modules (EMC + CPV ) |
| | 90 | // MIXT = 4 modules (EMC + CPV ) and 1 module (EMC + PPSD) |
| | 91 | // |
| | 92 | // We store hits : |
| | 93 | // - fHits (the "normal" one), which retains the hits associated with |
| | 94 | // the current primary particle being tracked |
| | 95 | // (this array is reset after each primary has been tracked). |
| | 96 | // |
| | 97 | |
| | 98 | fPinElectronicNoise = 0.010 ; |
| | 99 | fDigitThreshold = 0.1 ; // 1 GeV |
| | 100 | |
| | 101 | // We do not want to save in TreeH the raw hits |
| | 102 | // But save the cumulated hits instead (need to create the branch myself) |
| | 103 | // It is put in the Digit Tree because the TreeH is filled after each primary |
| | 104 | // and the TreeD at the end of the event (branch is set in FinishEvent() ). |
| | 105 | |
| | 106 | fHits= new TClonesArray("AliPHOSHit",1000) ; |
| | 107 | gAlice->AddHitList(fHits); |
| | 108 | |
| | 109 | fNhits = 0 ; |
| | 110 | |
| | 111 | fReconstructioner = 0; |
| | 112 | fTrackSegmentMaker = 0; |
| | 113 | |
| | 114 | fIshunt = 1 ; // All hits are associated with primary particles |
| | 115 | |
| | 116 | // Create array of EMC modules of the size of PHOS modules number |
| | 117 | |
| | 118 | if ( 0==(fEMCModules=new TClonesArray("AliPHOSCPVModule",fGeom->GetNModules())) ) { |
| | 119 | Error("AliPHOSv1","Can not create array of EMC modules"); |
| | 120 | exit(1); |
| | 121 | } |
| | 122 | TClonesArray &lemcmodule = *fEMCModules; |
| | 123 | for (Int_t i=0; i<fGeom->GetNModules(); i++) new(lemcmodule[i]) AliPHOSCPVModule(); |
| | 124 | |
| | 125 | // Create array of CPV modules for the IHEP's version of CPV |
| | 126 | |
| | 127 | if ( strcmp(fGeom->GetName(),"IHEP") == 0 || strcmp(fGeom->GetName(),"MIXT") == 0 ) { |
| | 128 | // Create array of CPV modules of the size of PHOS modules number |
| | 129 | |
| | 130 | if ( 0==(fCPVModules=new TClonesArray("AliPHOSCPVModule",fGeom->GetNCPVModules())) ) { |
| | 131 | Error("AliPHOSv1","Can not create array of CPV modules"); |
| | 132 | exit(1); |
| | 133 | } |
| | 134 | TClonesArray &lcpvmodule = *fCPVModules; |
| | 135 | for (Int_t i=0; i<fGeom->GetNCPVModules(); i++) new(lcpvmodule[i]) AliPHOSCPVModule(); |
| | 136 | } |
| | 137 | else { |
| | 138 | // Create an empty array of AliPHOSCPVModule to satisfy |
| | 139 | // AliPHOSv1::Streamer when writing root file |
| | 140 | |
| | 141 | fCPVModules=new TClonesArray("AliPHOSCPVModule",0); |
| | 142 | |
| | 143 | } |
| | 144 | } |
| | 145 | |
| | 146 | //____________________________________________________________________________ |
| | 147 | AliPHOSv1::AliPHOSv1(AliPHOSReconstructioner * Reconstructioner, const char *name, const char *title): |
| | 148 | AliPHOSv0(name,title) |
| | 149 | { |
| | 150 | // ctor : title is used to identify the layout |
| | 151 | // GPS2 = 5 modules (EMC + PPSD) |
| | 152 | // We use 2 arrays of hits : |
| | 153 | // |
| | 154 | // - fHits (the "normal" one), which retains the hits associated with |
| | 155 | // the current primary particle being tracked |
| | 156 | // (this array is reset after each primary has been tracked). |
| | 157 | // |
| | 158 | // - fTmpHits, which retains all the hits of the current event. It |
| | 159 | // is used for the digitization part. |
| | 160 | |
| | 161 | fPinElectronicNoise = 0.010 ; |
| | 162 | |
| | 163 | // We do not want to save in TreeH the raw hits |
| | 164 | //fHits = new TClonesArray("AliPHOSHit",100) ; |
| | 165 | |
| | 166 | fDigits = 0 ; |
| | 167 | fHits= new TClonesArray("AliPHOSHit",1000) ; |
| | 168 | gAlice->AddHitList(fHits); |
| | 169 | fNhits = 0 ; |
| | 170 | |
| | 171 | fIshunt = 1 ; // All hits are associated with primary particles |
| | 172 | |
| | 173 | // gets an instance of the geometry parameters class |
| | 174 | fGeom = AliPHOSGeometry::GetInstance(title, "") ; |
| | 175 | |
| | 176 | if (fGeom->IsInitialized() ) |
| | 177 | cout << "AliPHOS" << Version() << " : PHOS geometry intialized for " << fGeom->GetName() << endl ; |
| | 178 | else |
| | 179 | cout << "AliPHOS" << Version() << " : PHOS geometry initialization failed !" << endl ; |
| | 180 | |
| | 181 | // Defining the PHOS Reconstructioner |
| | 182 | |
| | 183 | fReconstructioner = Reconstructioner ; |
| | 184 | |
| | 185 | } |
| | 186 | |
| | 187 | //____________________________________________________________________________ |
| | 188 | AliPHOSv1::~AliPHOSv1() |
| | 189 | { |
| | 190 | // dtor |
| | 191 | |
| | 192 | if ( fHits) { |
| | 193 | fHits->Delete() ; |
| | 194 | delete fHits ; |
| | 195 | fHits = 0 ; |
| | 196 | } |
| | 197 | |
| | 198 | if ( fDigits) { |
| | 199 | fDigits->Delete() ; |
| | 200 | delete fDigits ; |
| | 201 | fDigits = 0 ; |
| | 202 | } |
| | 203 | |
| | 204 | if ( fEmcRecPoints ) { |
| | 205 | fEmcRecPoints->Delete() ; |
| | 206 | delete fEmcRecPoints ; |
| | 207 | fEmcRecPoints = 0 ; |
| | 208 | } |
| | 209 | |
| | 210 | if ( fPpsdRecPoints ) { |
| | 211 | fPpsdRecPoints->Delete() ; |
| | 212 | delete fPpsdRecPoints ; |
| | 213 | fPpsdRecPoints = 0 ; |
| | 214 | } |
| | 215 | |
| | 216 | if ( fTrackSegments ) { |
| | 217 | fTrackSegments->Delete() ; |
| | 218 | delete fTrackSegments ; |
| | 219 | fTrackSegments = 0 ; |
| | 220 | } |
| | 221 | |
| | 222 | } |
| | 223 | |
| | 224 | //____________________________________________________________________________ |
| | 225 | void AliPHOSv1::AddHit(Int_t shunt, Int_t primary, Int_t tracknumber, Int_t Id, Float_t * hits, Int_t trackpid) |
| | 226 | { |
| | 227 | // Add a hit to the hit list. |
| | 228 | // A PHOS hit is the sum of all hits in a single crystal |
| | 229 | // or in a single PPSD gas cell |
| | 230 | |
| | 231 | Int_t hitCounter ; |
| | 232 | AliPHOSHit *newHit ; |
| | 233 | AliPHOSHit *curHit ; |
| | 234 | Bool_t deja = kFALSE ; |
| | 235 | |
| | 236 | newHit = new AliPHOSHit(shunt, primary, tracknumber, Id, hits, trackpid) ; |
| | 237 | |
| | 238 | for ( hitCounter = 0 ; hitCounter < fNhits && !deja ; hitCounter++ ) { |
| | 239 | curHit = (AliPHOSHit*) (*fHits)[hitCounter] ; |
| | 240 | if( *curHit == *newHit ) { |
| | 241 | *curHit = *curHit + *newHit ; |
| | 242 | deja = kTRUE ; |
| | 243 | } |
| | 244 | } |
| | 245 | |
| | 246 | if ( !deja ) { |
| | 247 | new((*fHits)[fNhits]) AliPHOSHit(*newHit) ; |
| | 248 | fNhits++ ; |
| | 249 | } |
| | 250 | |
| | 251 | delete newHit; |
| | 252 | } |
| | 253 | |
| | 254 | //___________________________________________________________________________ |
| | 255 | Int_t AliPHOSv1::Digitize(Float_t Energy) |
| | 256 | { |
| | 257 | // Applies the energy calibration |
| | 258 | |
| | 259 | Float_t fB = 100000000. ; |
| | 260 | Float_t fA = 0. ; |
| | 261 | Int_t chan = Int_t(fA + Energy*fB ) ; |
| | 262 | return chan ; |
| | 263 | } |
| | 264 | |
| | 265 | //____________________________________________________________________________ |
| | 266 | void AliPHOSv1::Hit2Digit(Int_t ntracks){ |
| | 267 | //Collects all hits in the same active volume into digits |
| | 268 | |
| | 269 | if(fDigits!= 0) |
| | 270 | fDigits->Clear() ; |
| | 271 | else |
| | 272 | fDigits = new TClonesArray("AliPHOSDigit",1000) ; |
| | 273 | |
| | 274 | // Branch address for digit tree |
| | 275 | char branchname[20]; |
| | 276 | sprintf(branchname,"%s",GetName()); |
| | 277 | gAlice->TreeD()->Branch(branchname,&fDigits,fBufferSize); |
| | 278 | |
| | 279 | gAlice->TreeD()->GetEvent(0); |
| | 280 | |
| | 281 | |
| | 282 | Int_t i ; |
| | 283 | Int_t relid[4]; |
| | 284 | Int_t j ; |
| | 285 | AliPHOSHit * hit ; |
| | 286 | AliPHOSDigit * newdigit ; |
| | 287 | AliPHOSDigit * curdigit ; |
| | 288 | Bool_t deja = kFALSE ; |
| | 289 | |
| | 290 | Int_t itrack ; |
| | 291 | for (itrack=0; itrack<ntracks; itrack++){ |
| | 292 | |
| | 293 | //=========== Get the Hits Tree for the Primary track itrack |
| | 294 | gAlice->ResetHits(); |
| | 295 | gAlice->TreeH()->GetEvent(itrack); |
| | 296 | |
| | 297 | for ( i = 0 ; i < fHits->GetEntries() ; i++ ) { |
| | 298 | hit = (AliPHOSHit*)fHits->At(i) ; |
| | 299 | |
| | 300 | // Assign primary number only if contribution is significant |
| | 301 | if( hit->GetEnergy() > fDigitThreshold) |
| | 302 | newdigit = new AliPHOSDigit( hit->GetPrimary(), hit->GetId(), Digitize( hit->GetEnergy() ) ) ; |
| | 303 | else |
| | 304 | newdigit = new AliPHOSDigit( -1 , hit->GetId(), Digitize( hit->GetEnergy() ) ) ; |
| | 305 | deja =kFALSE ; |
| | 306 | |
| | 307 | |
| | 308 | for ( j = 0 ; j < fNdigits ; j++) { |
| | 309 | curdigit = (AliPHOSDigit*) fDigits->At(j) ; |
| | 310 | if ( *curdigit == *newdigit) { |
| | 311 | *curdigit = *curdigit + *newdigit ; |
| | 312 | deja = kTRUE ; |
| | 313 | } |
| | 314 | } |
| | 315 | |
| | 316 | if ( !deja ) { |
| | 317 | new((*fDigits)[fNdigits]) AliPHOSDigit(* newdigit) ; |
| | 318 | fNdigits++ ; |
| | 319 | } |
| | 320 | |
| | 321 | delete newdigit ; |
| | 322 | } |
| | 323 | |
| | 324 | } // loop over tracks |
| | 325 | |
| | 326 | // Noise induced by the PIN diode of the PbWO crystals |
| | 327 | |
| | 328 | Float_t energyandnoise ; |
| | 329 | for ( i = 0 ; i < fNdigits ; i++ ) { |
| | 330 | newdigit = (AliPHOSDigit * ) fDigits->At(i) ; |
| | 331 | |
| | 332 | fGeom->AbsToRelNumbering(newdigit->GetId(), relid) ; |
| | 333 | |
| | 334 | if (relid[1]==0){ // Digits belong to EMC (PbW0_4 crystals) |
| | 335 | energyandnoise = newdigit->GetAmp() + Digitize(gRandom->Gaus(0., fPinElectronicNoise)) ; |
| | 336 | |
| | 337 | if (energyandnoise < 0 ) |
| | 338 | energyandnoise = 0 ; |
| | 339 | |
| | 340 | if ( newdigit->GetAmp() < fDigitThreshold ) // if threshold not surpassed, remove digit from list |
| | 341 | fDigits->RemoveAt(i) ; |
| | 342 | } |
| | 343 | } |
| | 344 | |
| | 345 | fDigits->Compress() ; |
| | 346 | |
| | 347 | fNdigits = fDigits->GetEntries() ; |
| | 348 | fDigits->Expand(fNdigits) ; |
| | 349 | |
| | 350 | for (i = 0 ; i < fNdigits ; i++) { |
| | 351 | newdigit = (AliPHOSDigit *) fDigits->At(i) ; |
| | 352 | newdigit->SetIndexInList(i) ; |
| | 353 | } |
| | 354 | |
| | 355 | gAlice->TreeD()->Fill() ; |
| | 356 | |
| | 357 | gAlice->TreeD()->Write(0,TObject::kOverwrite) ; |
| | 358 | |
| | 359 | } |
| | 360 | //___________________________________________________________________________ |
| | 361 | void AliPHOSv1::MakeBranch(Option_t* opt) |
| | 362 | { |
| | 363 | // Create new branche in the current Root Tree in the digit Tree |
| | 364 | AliDetector::MakeBranch(opt) ; |
| | 365 | |
| | 366 | // Create new branches EMC<i> for hits in EMC modules |
| | 367 | |
| | 368 | for( Int_t i=0; i<fGeom->GetNModules(); i++ ) GetEMCModule(i).MakeBranch("EMC",i+1); |
| | 369 | |
| | 370 | // Create new branches CPV<i> for hits in CPV modules for IHEP geometry |
| | 371 | |
| | 372 | if ( strcmp(fGeom->GetName(),"IHEP") == 0 || strcmp(fGeom->GetName(),"MIXT") == 0 ) { |
| | 373 | for( Int_t i=0; i<fGeom->GetNCPVModules(); i++ ) GetCPVModule(i).MakeBranch("CPV",i+1); |
| | 374 | } |
| | 375 | |
| | 376 | } |
| | 377 | |
| | 378 | //_____________________________________________________________________________ |
| | 379 | void AliPHOSv1::Reconstruction(AliPHOSReconstructioner * Reconstructioner) |
| | 380 | { |
| | 381 | // 1. Reinitializes the existing RecPoint, TrackSegment, and RecParticles Lists and |
| | 382 | // 2. Creates TreeR with a branch for each list |
| | 383 | // 3. Steers the reconstruction processes |
| | 384 | // 4. Saves the 3 lists in TreeR |
| | 385 | // 5. Write the Tree to File |
| | 386 | |
| | 387 | fReconstructioner = Reconstructioner ; |
| | 388 | |
| | 389 | char branchname[10] ; |
| | 390 | |
| | 391 | // 1. |
| | 392 | |
| | 393 | // gAlice->MakeTree("R") ; |
| | 394 | Int_t splitlevel = 0 ; |
| | 395 | |
| | 396 | fEmcRecPoints->Delete() ; |
| | 397 | |
| | 398 | if ( fEmcRecPoints && gAlice->TreeR() ) { |
| | 399 | sprintf(branchname,"%sEmcRP",GetName()) ; |
| | 400 | gAlice->TreeR()->Branch(branchname, "TObjArray", &fEmcRecPoints, fBufferSize, splitlevel) ; |
| | 401 | } |
| | 402 | |
| | 403 | fPpsdRecPoints->Delete() ; |
| | 404 | |
| | 405 | if ( fPpsdRecPoints && gAlice->TreeR() ) { |
| | 406 | sprintf(branchname,"%sPpsdRP",GetName()) ; |
| | 407 | gAlice->TreeR()->Branch(branchname, "TObjArray", &fPpsdRecPoints, fBufferSize, splitlevel) ; |
| | 408 | } |
| | 409 | |
| | 410 | fTrackSegments->Delete() ; |
| | 411 | |
| | 412 | if ( fTrackSegments && gAlice->TreeR() ) { |
| | 413 | sprintf(branchname,"%sTS",GetName()) ; |
| | 414 | gAlice->TreeR()->Branch(branchname, &fTrackSegments, fBufferSize) ; |
| | 415 | } |
| | 416 | |
| | 417 | fRecParticles->Delete() ; |
| | 418 | |
| | 419 | if (strcmp(fGeom->GetName(),"GPS2") == 0 || strcmp(fGeom->GetName(),"MIXT") == 0) { |
| | 420 | if ( fRecParticles && gAlice->TreeR() ) { |
| | 421 | sprintf(branchname,"%sRP",GetName()) ; |
| | 422 | gAlice->TreeR()->Branch(branchname, &fRecParticles, fBufferSize) ; |
| | 423 | } |
| | 424 | } |
| | 425 | |
| | 426 | // 3. |
| | 427 | if (strcmp(fGeom->GetName(),"GPS2") == 0 || strcmp(fGeom->GetName(),"MIXT") == 0) |
| | 428 | fReconstructioner->MakePPSD(fDigits, fEmcRecPoints, fPpsdRecPoints, fTrackSegments, fRecParticles); |
| | 429 | if (strcmp(fGeom->GetName(),"IHEP") == 0 || strcmp(fGeom->GetName(),"MIXT") == 0) |
| | 430 | fReconstructioner->MakeCPV (fDigits, fEmcRecPoints, fPpsdRecPoints); |
| | 431 | |
| | 432 | // 4. Expand or Shrink the arrays to the proper size |
| | 433 | |
| | 434 | Int_t size ; |
| | 435 | |
| | 436 | size = fEmcRecPoints->GetEntries() ; |
| | 437 | fEmcRecPoints->Expand(size) ; |
| | 438 | |
| | 439 | size = fPpsdRecPoints->GetEntries() ; |
| | 440 | fPpsdRecPoints->Expand(size) ; |
| | 441 | |
| | 442 | size = fTrackSegments->GetEntries() ; |
| | 443 | fTrackSegments->Expand(size) ; |
| | 444 | |
| | 445 | size = fRecParticles->GetEntries() ; |
| | 446 | fRecParticles->Expand(size) ; |
| | 447 | |
| | 448 | gAlice->TreeR()->Fill() ; |
| | 449 | // 5. |
| | 450 | |
| | 451 | gAlice->TreeR()->Write(0,TObject::kOverwrite) ; |
| | 452 | |
| | 453 | // Deleting reconstructed objects |
| | 454 | ResetReconstruction(); |
| | 455 | |
| | 456 | } |
| | 457 | |
| | 458 | //____________________________________________________________________________ |
| | 459 | void AliPHOSv1::ResetHits() |
| | 460 | { |
| | 461 | // Reset hit tree for EMC and CPV |
| | 462 | // Yuri Kharlov, 28 September 2000 |
| | 463 | |
| | 464 | AliDetector::ResetHits(); |
| | 465 | for (Int_t i=0; i<fGeom->GetNModules(); i++) ((AliPHOSCPVModule*)(*fEMCModules)[i]) -> Clear(); |
| | 466 | if ( strcmp(fGeom->GetName(),"IHEP") == 0 || strcmp(fGeom->GetName(),"MIXT") == 0 ) { |
| | 467 | for (Int_t i=0; i<fGeom->GetNCPVModules(); i++) ((AliPHOSCPVModule*)(*fCPVModules)[i]) -> Clear(); |
| | 468 | } |
| | 469 | |
| | 470 | } |
| | 471 | //____________________________________________________________________________ |
| | 472 | void AliPHOSv1::ResetReconstruction() |
| | 473 | { |
| | 474 | // Deleting reconstructed objects |
| | 475 | |
| | 476 | if ( fEmcRecPoints ) fEmcRecPoints->Delete(); |
| | 477 | if ( fPpsdRecPoints ) fPpsdRecPoints->Delete(); |
| | 478 | if ( fTrackSegments ) fTrackSegments->Delete(); |
| | 479 | if ( fRecParticles ) fRecParticles->Delete(); |
| | 480 | |
| | 481 | } |
| | 482 | |
| | 483 | //____________________________________________________________________________ |
| | 484 | void AliPHOSv1::SetTreeAddress() |
| | 485 | { |
| | 486 | // TBranch *branch; |
| | 487 | AliPHOS::SetTreeAddress(); |
| | 488 | |
| | 489 | // //Branch address for TreeR: RecPpsdRecPoint |
| | 490 | // TTree *treeR = gAlice->TreeR(); |
| | 491 | // if ( treeR && fPpsdRecPoints ) { |
| | 492 | // branch = treeR->GetBranch("PHOSPpsdRP"); |
| | 493 | // if (branch) branch->SetAddress(&fPpsdRecPoints) ; |
| | 494 | // } |
| | 495 | |
| | 496 | // Set branch address for the Hits Tree for hits in EMC modules |
| | 497 | // Yuri Kharlov, 23 November 2000. |
| | 498 | |
| | 499 | for( Int_t i=0; i<fGeom->GetNModules(); i++ ) GetEMCModule(i).SetTreeAddress("EMC",i+1); |
| | 500 | |
| | 501 | // Set branch address for the Hits Tree for hits in CPV modules for IHEP geometry |
| | 502 | // Yuri Kharlov, 28 September 2000. |
| | 503 | |
| | 504 | if ( strcmp(fGeom->GetName(),"IHEP") == 0 || strcmp(fGeom->GetName(),"MIXT") == 0 ) { |
| | 505 | for( Int_t i=0; i<fGeom->GetNCPVModules(); i++ ) GetCPVModule(i).SetTreeAddress("CPV",i+1); |
| | 506 | } |
| | 507 | |
| | 508 | } |
| | 509 | |
| | 510 | //____________________________________________________________________________ |
| | 511 | |
| | 512 | void AliPHOSv1::StepManager(void) |
| | 513 | { |
| | 514 | // Accumulates hits as long as the track stays in a single crystal or PPSD gas Cell |
| | 515 | |
| | 516 | // if (gMC->IsTrackEntering()) |
| | 517 | // cout << "Track enters the volume " << gMC->CurrentVolName() << endl; |
| | 518 | // if (gMC->IsTrackExiting()) |
| | 519 | // cout << "Track leaves the volume " << gMC->CurrentVolName() << endl; |
| | 520 | |
| | 521 | Int_t relid[4] ; // (box, layer, row, column) indices |
| | 522 | Int_t absid ; // absolute cell ID number |
| | 523 | Float_t xyze[4]={0,0,0,0} ; // position wrt MRS and energy deposited |
| | 524 | TLorentzVector pos ; // Lorentz vector of the track current position |
| | 525 | Int_t copy ; |
| | 526 | Int_t i ; |
| | 527 | |
| | 528 | Int_t tracknumber = gAlice->CurrentTrack() ; |
| | 529 | Int_t primary = gAlice->GetPrimary( gAlice->CurrentTrack() ); |
| | 530 | TString name = fGeom->GetName() ; |
| | 531 | Int_t trackpid = gMC->TrackPid() ; |
| | 532 | if ( name == "GPS2" || name == "MIXT" ) { // ======> CPV is a GPS' PPSD |
| | 533 | |
| | 534 | if( gMC->CurrentVolID(copy) == gMC->VolId("GCEL") ) // We are inside a gas cell |
| | 535 | { |
| | 536 | gMC->TrackPosition(pos) ; |
| | 537 | xyze[0] = pos[0] ; |
| | 538 | xyze[1] = pos[1] ; |
| | 539 | xyze[2] = pos[2] ; |
| | 540 | xyze[3] = gMC->Edep() ; |
| | 541 | |
| | 542 | if ( xyze[3] != 0 ) { // there is deposited energy |
| | 543 | gMC->CurrentVolOffID(5, relid[0]) ; // get the PHOS Module number |
| | 544 | if ( name == "MIXT" && strcmp(gMC->CurrentVolOffName(5),"PHO1") == 0 ) |
| | 545 | relid[0] += fGeom->GetNModules() - fGeom->GetNPPSDModules(); |
| | 546 | gMC->CurrentVolOffID(3, relid[1]) ; // get the Micromegas Module number |
| | 547 | // 1-> fGeom->GetNumberOfModulesPhi() * fGeom->GetNumberOfModulesZ() upper |
| | 548 | // > fGeom->GetNumberOfModulesPhi() * fGeom->GetNumberOfModulesZ() lower |
| | 549 | gMC->CurrentVolOffID(1, relid[2]) ; // get the row number of the cell |
| | 550 | gMC->CurrentVolID(relid[3]) ; // get the column number |
| | 551 | |
| | 552 | // get the absolute Id number |
| | 553 | |
| | 554 | fGeom->RelToAbsNumbering(relid, absid) ; |
| | 555 | |
| | 556 | // add current hit to the hit list |
| | 557 | AddHit(fIshunt, primary, tracknumber, absid, xyze, trackpid); |
| | 558 | |
| | 559 | } // there is deposited energy |
| | 560 | } // We are inside the gas of the CPV |
| | 561 | } // GPS2 configuration |
| | 562 | |
| | 563 | if ( name == "IHEP" || name == "MIXT" ) { // ======> CPV is a IHEP's one |
| | 564 | |
| | 565 | // Yuri Kharlov, 28 September 2000 |
| | 566 | |
| | 567 | if( gMC->CurrentVolID(copy) == gMC->VolId("CPVQ") && |
| | 568 | gMC->IsTrackEntering() && |
| | 569 | gMC->TrackCharge() != 0) { |
| | 570 | |
| | 571 | // Charged track has just entered to the CPV sensitive plane |
| | 572 | |
| | 573 | AliPHOSv1 &phos = *(AliPHOSv1*)gAlice->GetModule("PHOS"); |
| | 574 | |
| | 575 | Int_t moduleNumber; |
| | 576 | gMC->CurrentVolOffID(3,moduleNumber); |
| | 577 | moduleNumber--; |
| | 578 | |
| | 579 | // Current position of the hit in the CPV module ref. system |
| | 580 | |
| | 581 | gMC -> TrackPosition(pos); |
| | 582 | Float_t xyzm[3], xyzd[3], xyd[3]={0,0,0}; |
| | 583 | Int_t i; |
| | 584 | for (i=0; i<3; i++) xyzm[i] = pos[i]; |
| | 585 | gMC -> Gmtod (xyzm, xyzd, 1); // transform coordinate from master to daughter system |
| | 586 | xyd[0] = xyzd[0]; |
| | 587 | xyd[1] =-xyzd[2]; |
| | 588 | |
| | 589 | // Current momentum of the hit's track in the CPV module ref. system |
| | 590 | |
| | 591 | TLorentzVector pmom; |
| | 592 | gMC -> TrackMomentum(pmom); |
| | 593 | Float_t pm[3], pd[3]; |
| | 594 | for (i=0; i<3; i++) pm[i] = pmom[i]; |
| | 595 | gMC -> Gmtod (pm, pd, 2); // transform 3-momentum from master to daughter system |
| | 596 | pmom[0] = pd[0]; |
| | 597 | pmom[1] =-pd[1]; |
| | 598 | pmom[2] =-pd[2]; |
| | 599 | |
| | 600 | // Current particle type of the hit's track |
| | 601 | |
| | 602 | Int_t ipart = gMC->TrackPid(); |
| | 603 | |
| | 604 | // Add the current particle in the list of the CPV hits. |
| | 605 | |
| | 606 | phos.GetCPVModule(moduleNumber).AddHit(fIshunt,primary,pmom,xyd,ipart); |
| | 607 | |
| | 608 | if (fDebug == 1) { |
| | 609 | printf("CPV hit added to module #%2d: p = (% .4f, % .4f, % .4f, % .4f) GeV,\n", |
| | 610 | moduleNumber+1,pmom.Px(),pmom.Py(),pmom.Pz(),pmom.E()); |
| | 611 | printf( " xy = (%8.4f, %8.4f) cm, ipart = %d, primary = %d\n", |
| | 612 | xyd[0],xyd[1],ipart,primary); |
| | 613 | } |
| | 614 | |
| | 615 | // Digitize the current CPV hit: |
| | 616 | |
| | 617 | // 1. find pad response and |
| | 618 | |
| | 619 | TClonesArray *cpvDigits = new TClonesArray("AliPHOSCPVDigit",0); // array of digits for current hit |
| | 620 | CPVDigitize(pmom,xyd,moduleNumber,cpvDigits); |
| | 621 | |
| | 622 | Float_t xmean = 0; |
| | 623 | Float_t zmean = 0; |
| | 624 | Float_t qsum = 0; |
| | 625 | Int_t idigit,ndigits; |
| | 626 | |
| | 627 | // 2. go through the current digit list and sum digits in pads |
| | 628 | |
| | 629 | ndigits = cpvDigits->GetEntriesFast(); |
| | 630 | for (idigit=0; idigit<ndigits-1; idigit++) { |
| | 631 | AliPHOSCPVDigit *cpvDigit1 = (AliPHOSCPVDigit*) cpvDigits->UncheckedAt(idigit); |
| | 632 | Float_t x1 = cpvDigit1->GetXpad() ; |
| | 633 | Float_t z1 = cpvDigit1->GetYpad() ; |
| | 634 | for (Int_t jdigit=idigit+1; jdigit<ndigits; jdigit++) { |
| | 635 | AliPHOSCPVDigit *cpvDigit2 = (AliPHOSCPVDigit*) cpvDigits->UncheckedAt(jdigit); |
| | 636 | Float_t x2 = cpvDigit2->GetXpad() ; |
| | 637 | Float_t z2 = cpvDigit2->GetYpad() ; |
| | 638 | if (x1==x2 && z1==z2) { |
| | 639 | Float_t qsum = cpvDigit1->GetQpad() + cpvDigit2->GetQpad() ; |
| | 640 | cpvDigit2->SetQpad(qsum) ; |
| | 641 | cpvDigits->RemoveAt(idigit) ; |
| | 642 | } |
| | 643 | } |
| | 644 | } |
| | 645 | cpvDigits->Compress() ; |
| | 646 | |
| | 647 | // 3. add digits to temporary hit list fTmpHits |
| | 648 | |
| | 649 | ndigits = cpvDigits->GetEntriesFast(); |
| | 650 | for (idigit=0; idigit<ndigits; idigit++) { |
| | 651 | AliPHOSCPVDigit *cpvDigit = (AliPHOSCPVDigit*) cpvDigits->UncheckedAt(idigit); |
| | 652 | relid[0] = moduleNumber + 1 ; // CPV (or PHOS) module number |
| | 653 | relid[1] =-1 ; // means CPV |
| | 654 | relid[2] = cpvDigit->GetXpad() ; // column number of a pad |
| | 655 | relid[3] = cpvDigit->GetYpad() ; // row number of a pad |
| | 656 | |
| | 657 | // get the absolute Id number |
| | 658 | fGeom->RelToAbsNumbering(relid, absid) ; |
| | 659 | |
| | 660 | // add current digit to the temporary hit list |
| | 661 | xyze[0] = 0. ; |
| | 662 | xyze[1] = 0. ; |
| | 663 | xyze[2] = 0. ; |
| | 664 | xyze[3] = cpvDigit->GetQpad() ; // amplitude in a pad |
| | 665 | primary = -1; // No need in primary for CPV |
| | 666 | AddHit(fIshunt, primary, tracknumber, absid, xyze, trackpid); |
| | 667 | |
| | 668 | if (cpvDigit->GetQpad() > 0.02) { |
| | 669 | xmean += cpvDigit->GetQpad() * (cpvDigit->GetXpad() + 0.5); |
| | 670 | zmean += cpvDigit->GetQpad() * (cpvDigit->GetYpad() + 0.5); |
| | 671 | qsum += cpvDigit->GetQpad(); |
| | 672 | } |
| | 673 | } |
| | 674 | delete cpvDigits; |
| | 675 | } |
| | 676 | } // end of IHEP configuration |
| | 677 | |
| | 678 | if(gMC->CurrentVolID(copy) == gMC->VolId("PXTL") ) { // We are inside a PBWO crystal |
| | 679 | gMC->TrackPosition(pos) ; |
| | 680 | xyze[0] = pos[0] ; |
| | 681 | xyze[1] = pos[1] ; |
| | 682 | xyze[2] = pos[2] ; |
| | 683 | xyze[3] = gMC->Edep() ; |
| | 684 | |
| | 685 | // Track enters to the crystal from the top edge |
| | 686 | |
| | 687 | if (gMC->IsTrackEntering()) { |
| | 688 | Float_t posloc[3]; |
| | 689 | gMC -> Gmtod (xyze, posloc, 1); |
| | 690 | if (posloc[1] > fGeom->GetCrystalSize(1)/2-0.01) { |
| | 691 | Int_t row,cel; |
| | 692 | Float_t xyd[3]={0,0,0}; |
| | 693 | AliPHOSv1 &phos = *(AliPHOSv1*)gAlice->GetModule("PHOS"); |
| | 694 | |
| | 695 | Int_t moduleNumber; |
| | 696 | gMC->CurrentVolOffID(10,moduleNumber); |
| | 697 | if ( name == "MIXT" && strcmp(gMC->CurrentVolOffName(10),"PHO1") == 0 ) |
| | 698 | moduleNumber += fGeom->GetNModules() - fGeom->GetNPPSDModules(); |
| | 699 | moduleNumber--; |
| | 700 | |
| | 701 | gMC->CurrentVolOffID(4, row) ; // get the row number inside the module |
| | 702 | gMC->CurrentVolOffID(3, cel) ; // get the cell number inside the module |
| | 703 | xyd[0] = -(posloc[2] + (cel-0.5-fGeom->GetNZ() /2) * |
| | 704 | (fGeom->GetCrystalSize(2) + 2 * fGeom->GetGapBetweenCrystals())); |
| | 705 | xyd[1] = posloc[0] + (row-0.5-fGeom->GetNPhi()/2) * |
| | 706 | (fGeom->GetCrystalSize(0) + 2 * fGeom->GetGapBetweenCrystals()); |
| | 707 | |
| | 708 | // Current momentum of the hit's track in the CPV module ref. system |
| | 709 | |
| | 710 | TLorentzVector pmom; |
| | 711 | gMC -> TrackMomentum(pmom); |
| | 712 | Float_t pm[3], pd[3]; |
| | 713 | for (i=0; i<3; i++) pm[i] = pmom[i]; |
| | 714 | gMC -> Gmtod (pm, pd, 2); // transform 3-momentum from master to daughter system |
| | 715 | pmom[0] = pd[0]; |
| | 716 | pmom[1] =-pd[1]; |
| | 717 | pmom[2] =-pd[2]; |
| | 718 | |
| | 719 | // Current particle type of the hit's track |
| | 720 | |
| | 721 | Int_t ipart = gMC->TrackPid(); |
| | 722 | |
| | 723 | // Add the current particle in the list of the EMC hits. |
| | 724 | |
| | 725 | phos.GetEMCModule(moduleNumber).AddHit(fIshunt,primary,pmom,xyd,ipart); |
| | 726 | |
| | 727 | if (fDebug == 1) { |
| | 728 | printf("EMC hit added to module #%2d: p = (% .4f, % .4f, % .4f, % .4f) GeV,\n", |
| | 729 | moduleNumber+1,pmom.Px(),pmom.Py(),pmom.Pz(),pmom.E()); |
| | 730 | printf( " xy = (%8.4f, %8.4f) cm, ipart = %d, primary = %d\n", |
| | 731 | xyd[0],xyd[1],ipart,primary); |
| | 732 | } |
| | 733 | } |
| | 734 | } |
| | 735 | |
| | 736 | // Track is inside the crystal and deposits some energy |
| | 737 | |
| | 738 | if ( xyze[3] != 0 ) { |
| | 739 | gMC->CurrentVolOffID(10, relid[0]) ; // get the PHOS module number ; |
| | 740 | if ( name == "MIXT" && strcmp(gMC->CurrentVolOffName(5),"PHO1") == 0 ) |
| | 741 | relid[0] += fGeom->GetNModules() - fGeom->GetNPPSDModules(); |
| | 742 | relid[1] = 0 ; // means PBW04 |
| | 743 | gMC->CurrentVolOffID(4, relid[2]) ; // get the row number inside the module |
| | 744 | gMC->CurrentVolOffID(3, relid[3]) ; // get the cell number inside the module |
| | 745 | |
| | 746 | // get the absolute Id number |
| | 747 | |
| | 748 | fGeom->RelToAbsNumbering(relid, absid) ; |
| | 749 | |
| | 750 | // add current hit to the hit list |
| | 751 | |
| | 752 | AddHit(fIshunt, primary,tracknumber, absid, xyze, trackpid); |
| | 753 | |
| | 754 | } // there is deposited energy |
| | 755 | } // we are inside a PHOS Xtal |
| | 756 | } |
| | 757 | |
| | 758 | //____________________________________________________________________________ |
| | 759 | void AliPHOSv1::CPVDigitize (TLorentzVector p, Float_t *zxhit, Int_t moduleNumber, TClonesArray *cpvDigits) |
| | 760 | { |
| | 761 | // ------------------------------------------------------------------------ |
| | 762 | // Digitize one CPV hit: |
| | 763 | // On input take exact 4-momentum p and position zxhit of the hit, |
| | 764 | // find the pad response around this hit and |
| | 765 | // put the amplitudes in the pads into array digits |
| | 766 | // |
| | 767 | // Author: Yuri Kharlov (after Serguei Sadovsky) |
| | 768 | // 2 October 2000 |
| | 769 | // ------------------------------------------------------------------------ |
| | 770 | |
| | 771 | const Float_t kCelWr = fGeom->GetPadSizePhi()/2; // Distance between wires (2 wires above 1 pad) |
| | 772 | const Float_t kDetR = 0.1; // Relative energy fluctuation in track for 100 e- |
| | 773 | const Float_t kdEdx = 4.0; // Average energy loss in CPV; |
| | 774 | const Int_t kNgamz = 5; // Ionization size in Z |
| | 775 | const Int_t kNgamx = 9; // Ionization size in Phi |
| | 776 | const Float_t kNoise = 0.03; // charge noise in one pad |
| | 777 | |
| | 778 | Float_t rnor1,rnor2; |
| | 779 | |
| | 780 | // Just a reminder on axes notation in the CPV module: |
| | 781 | // axis Z goes along the beam |
| | 782 | // axis X goes across the beam in the module plane |
| | 783 | // axis Y is a normal to the module plane showing from the IP |
| | 784 | |
| | 785 | Float_t hitX = zxhit[0]; |
| | 786 | Float_t hitZ =-zxhit[1]; |
| | 787 | Float_t pX = p.Px(); |
| | 788 | Float_t pZ =-p.Pz(); |
| | 789 | Float_t pNorm = p.Py(); |
| | 790 | Float_t eloss = kdEdx; |
| | 791 | |
| | 792 | // cout << "CPVDigitize: YVK : "<<hitX<<" "<<hitZ<<" | "<<pX<<" "<<pZ<<" "<<pNorm<<endl; |
| | 793 | |
| | 794 | Float_t dZY = pZ/pNorm * fGeom->GetCPVGasThickness(); |
| | 795 | Float_t dXY = pX/pNorm * fGeom->GetCPVGasThickness(); |
| | 796 | gRandom->Rannor(rnor1,rnor2); |
| | 797 | eloss *= (1 + kDetR*rnor1) * |
| | 798 | TMath::Sqrt((1 + ( pow(dZY,2) + pow(dXY,2) ) / pow(fGeom->GetCPVGasThickness(),2))); |
| | 799 | Float_t zhit1 = hitZ + fGeom->GetCPVActiveSize(1)/2 - dZY/2; |
| | 800 | Float_t xhit1 = hitX + fGeom->GetCPVActiveSize(0)/2 - dXY/2; |
| | 801 | Float_t zhit2 = zhit1 + dZY; |
| | 802 | Float_t xhit2 = xhit1 + dXY; |
| | 803 | |
| | 804 | Int_t iwht1 = (Int_t) (xhit1 / kCelWr); // wire (x) coordinate "in" |
| | 805 | Int_t iwht2 = (Int_t) (xhit2 / kCelWr); // wire (x) coordinate "out" |
| | 806 | |
| | 807 | Int_t nIter; |
| | 808 | Float_t zxe[3][5]; |
| | 809 | if (iwht1==iwht2) { // incline 1-wire hit |
| | 810 | nIter = 2; |
| | 811 | zxe[0][0] = (zhit1 + zhit2 - dZY*0.57735) / 2; |
| | 812 | zxe[1][0] = (iwht1 + 0.5) * kCelWr; |
| | 813 | zxe[2][0] = eloss/2; |
| | 814 | zxe[0][1] = (zhit1 + zhit2 + dZY*0.57735) / 2; |
| | 815 | zxe[1][1] = (iwht1 + 0.5) * kCelWr; |
| | 816 | zxe[2][1] = eloss/2; |
| | 817 | } |
| | 818 | else if (TMath::Abs(iwht1-iwht2) != 1) { // incline 3-wire hit |
| | 819 | nIter = 3; |
| | 820 | Int_t iwht3 = (iwht1 + iwht2) / 2; |
| | 821 | Float_t xwht1 = (iwht1 + 0.5) * kCelWr; // wire 1 |
| | 822 | Float_t xwht2 = (iwht2 + 0.5) * kCelWr; // wire 2 |
| | 823 | Float_t xwht3 = (iwht3 + 0.5) * kCelWr; // wire 3 |
| | 824 | Float_t xwr13 = (xwht1 + xwht3) / 2; // center 13 |
| | 825 | Float_t xwr23 = (xwht2 + xwht3) / 2; // center 23 |
| | 826 | Float_t dxw1 = xhit1 - xwr13; |
| | 827 | Float_t dxw2 = xhit2 - xwr23; |
| | 828 | Float_t egm1 = TMath::Abs(dxw1) / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) + kCelWr ); |
| | 829 | Float_t egm2 = TMath::Abs(dxw2) / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) + kCelWr ); |
| | 830 | Float_t egm3 = kCelWr / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) + kCelWr ); |
| | 831 | zxe[0][0] = (dXY*(xwr13-xwht1)/dXY + zhit1 + zhit1) / 2; |
| | 832 | zxe[1][0] = xwht1; |
| | 833 | zxe[2][0] = eloss * egm1; |
| | 834 | zxe[0][1] = (dXY*(xwr23-xwht1)/dXY + zhit1 + zhit2) / 2; |
| | 835 | zxe[1][1] = xwht2; |
| | 836 | zxe[2][1] = eloss * egm2; |
| | 837 | zxe[0][2] = dXY*(xwht3-xwht1)/dXY + zhit1; |
| | 838 | zxe[1][2] = xwht3; |
| | 839 | zxe[2][2] = eloss * egm3; |
| | 840 | } |
| | 841 | else { // incline 2-wire hit |
| | 842 | nIter = 2; |
| | 843 | Float_t xwht1 = (iwht1 + 0.5) * kCelWr; |
| | 844 | Float_t xwht2 = (iwht2 + 0.5) * kCelWr; |
| | 845 | Float_t xwr12 = (xwht1 + xwht2) / 2; |
| | 846 | Float_t dxw1 = xhit1 - xwr12; |
| | 847 | Float_t dxw2 = xhit2 - xwr12; |
| | 848 | Float_t egm1 = TMath::Abs(dxw1) / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) ); |
| | 849 | Float_t egm2 = TMath::Abs(dxw2) / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) ); |
| | 850 | zxe[0][0] = (zhit1 + zhit2 - dZY*egm1) / 2; |
| | 851 | zxe[1][0] = xwht1; |
| | 852 | zxe[2][0] = eloss * egm1; |
| | 853 | zxe[0][1] = (zhit1 + zhit2 + dZY*egm2) / 2; |
| | 854 | zxe[1][1] = xwht2; |
| | 855 | zxe[2][1] = eloss * egm2; |
| | 856 | } |
| | 857 | |
| | 858 | // Finite size of ionization region |
| | 859 | |
| | 860 | Int_t nCellZ = fGeom->GetNumberOfCPVPadsZ(); |
| | 861 | Int_t nCellX = fGeom->GetNumberOfCPVPadsPhi(); |
| | 862 | Int_t nz3 = (kNgamz+1)/2; |
| | 863 | Int_t nx3 = (kNgamx+1)/2; |
| | 864 | cpvDigits->Expand(nIter*kNgamx*kNgamz); |
| | 865 | TClonesArray &ldigits = *(TClonesArray *)cpvDigits; |
| | 866 | |
| | 867 | for (Int_t iter=0; iter<nIter; iter++) { |
| | 868 | |
| | 869 | Float_t zhit = zxe[0][iter]; |
| | 870 | Float_t xhit = zxe[1][iter]; |
| | 871 | Float_t qhit = zxe[2][iter]; |
| | 872 | Float_t zcell = zhit / fGeom->GetPadSizeZ(); |
| | 873 | Float_t xcell = xhit / fGeom->GetPadSizePhi(); |
| | 874 | if ( zcell<=0 || xcell<=0 || |
| | 875 | zcell>=nCellZ || xcell>=nCellX) return; |
| | 876 | Int_t izcell = (Int_t) zcell; |
| | 877 | Int_t ixcell = (Int_t) xcell; |
| | 878 | Float_t zc = zcell - izcell - 0.5; |
| | 879 | Float_t xc = xcell - ixcell - 0.5; |
| | 880 | for (Int_t iz=1; iz<=kNgamz; iz++) { |
| | 881 | Int_t kzg = izcell + iz - nz3; |
| | 882 | if (kzg<=0 || kzg>nCellZ) continue; |
| | 883 | Float_t zg = (Float_t)(iz-nz3) - zc; |
| | 884 | for (Int_t ix=1; ix<=kNgamx; ix++) { |
| | 885 | Int_t kxg = ixcell + ix - nx3; |
| | 886 | if (kxg<=0 || kxg>nCellX) continue; |
| | 887 | Float_t xg = (Float_t)(ix-nx3) - xc; |
| | 888 | |
| | 889 | // Now calculate pad response |
| | 890 | Float_t qpad = CPVPadResponseFunction(qhit,zg,xg); |
| | 891 | qpad += kNoise*rnor2; |
| | 892 | if (qpad<0) continue; |
| | 893 | |
| | 894 | // Fill the array with pad response ID and amplitude |
| | 895 | new(ldigits[cpvDigits->GetEntriesFast()]) AliPHOSCPVDigit(kxg,kzg,qpad); |
| | 896 | } |
| | 897 | } |
| | 898 | } |
| | 899 | } |
| | 900 | |
| | 901 | //____________________________________________________________________________ |
| | 902 | Float_t AliPHOSv1::CPVPadResponseFunction(Float_t qhit, Float_t zhit, Float_t xhit) { |
| | 903 | // ------------------------------------------------------------------------ |
| | 904 | // Calculate the amplitude in one CPV pad using the |
| | 905 | // cumulative pad response function |
| | 906 | // Author: Yuri Kharlov (after Serguei Sadovski) |
| | 907 | // 3 October 2000 |
| | 908 | // ------------------------------------------------------------------------ |
| | 909 | |
| | 910 | Double_t dz = fGeom->GetPadSizeZ() / 2; |
| | 911 | Double_t dx = fGeom->GetPadSizePhi() / 2; |
| | 912 | Double_t z = zhit * fGeom->GetPadSizeZ(); |
| | 913 | Double_t x = xhit * fGeom->GetPadSizePhi(); |
| | 914 | Double_t amplitude = qhit * |
| | 915 | (CPVCumulPadResponse(z+dz,x+dx) - CPVCumulPadResponse(z+dz,x-dx) - |
| | 916 | CPVCumulPadResponse(z-dz,x+dx) + CPVCumulPadResponse(z-dz,x-dx)); |
| | 917 | return (Float_t)amplitude; |
| | 918 | } |
| | 919 | |
| | 920 | //____________________________________________________________________________ |
| | 921 | Double_t AliPHOSv1::CPVCumulPadResponse(Double_t x, Double_t y) { |
| | 922 | // ------------------------------------------------------------------------ |
| | 923 | // Cumulative pad response function |
| | 924 | // It includes several terms from the CF decomposition in electrostatics |
| | 925 | // Note: this cumulative function is wrong since omits some terms |
| | 926 | // but the cell amplitude obtained with it is correct because |
| | 927 | // these omitting terms cancel |
| | 928 | // Author: Yuri Kharlov (after Serguei Sadovski) |
| | 929 | // 3 October 2000 |
| | 930 | // ------------------------------------------------------------------------ |
| | 931 | |
| | 932 | const Double_t kA=1.0; |
| | 933 | const Double_t kB=0.7; |
| | 934 | |
| | 935 | Double_t r2 = x*x + y*y; |
| | 936 | Double_t xy = x*y; |
| | 937 | Double_t cumulPRF = 0; |
| | 938 | for (Int_t i=0; i<=4; i++) { |
| | 939 | Double_t b1 = (2*i + 1) * kB; |
| | 940 | cumulPRF += TMath::Power(-1,i) * TMath::ATan( xy / (b1*TMath::Sqrt(b1*b1 + r2)) ); |
| | 941 | } |
| | 942 | cumulPRF *= kA/(2*TMath::Pi()); |
| | 943 | return cumulPRF; |
| | 944 | } |
| | 945 | |
git://git.uio.no / u / mrichter / AliRoot.git / blame_incremental