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7587f5a5 | 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 | ||
b2a60966 | 16 | /* $Id$ */ |
5f20d3fb | 17 | |
7587f5a5 | 18 | //_________________________________________________________________________ |
5f20d3fb | 19 | // Implementation version v1 of PHOS Manager class |
a3dfe79c | 20 | //--- |
21 | // Layout EMC + PPSD has name GPS2: | |
ed4205d8 | 22 | // Produces cumulated hits |
a3dfe79c | 23 | //--- |
24 | // Layout EMC + CPV has name IHEP: | |
ed4205d8 | 25 | // Produces hits for CPV, cumulated hits |
26 | //--- | |
27 | // Layout EMC + CPV + PPSD has name GPS: | |
28 | // Produces hits for CPV, cumulated hits | |
29 | //--- | |
5f20d3fb | 30 | //*-- Author: Yves Schutz (SUBATECH) |
b2a60966 | 31 | |
7587f5a5 | 32 | |
33 | // --- ROOT system --- | |
bea63bea | 34 | |
35 | #include "TBRIK.h" | |
36 | #include "TNode.h" | |
7587f5a5 | 37 | #include "TRandom.h" |
94de3818 | 38 | #include "TTree.h" |
7587f5a5 | 39 | |
5f20d3fb | 40 | |
7587f5a5 | 41 | // --- Standard library --- |
42 | ||
de9ec31b | 43 | #include <stdio.h> |
44 | #include <string.h> | |
45 | #include <stdlib.h> | |
46 | #include <strstream.h> | |
7587f5a5 | 47 | |
48 | // --- AliRoot header files --- | |
49 | ||
50 | #include "AliPHOSv1.h" | |
51 | #include "AliPHOSHit.h" | |
52 | #include "AliPHOSDigit.h" | |
bea63bea | 53 | #include "AliPHOSReconstructioner.h" |
7587f5a5 | 54 | #include "AliRun.h" |
55 | #include "AliConst.h" | |
94de3818 | 56 | #include "AliMC.h" |
7587f5a5 | 57 | |
58 | ClassImp(AliPHOSv1) | |
59 | ||
bea63bea | 60 | //____________________________________________________________________________ |
61 | AliPHOSv1::AliPHOSv1() | |
62 | { | |
5f20d3fb | 63 | // ctor |
fc879520 | 64 | |
3d402178 | 65 | // Create an empty array of AliPHOSCPVModule to satisfy |
fa412d9b | 66 | // AliPHOSv1::Streamer when reading root file |
ed4205d8 | 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 | } | |
fa412d9b | 75 | |
ed4205d8 | 76 | if ( 0==(fCPVModules=new TClonesArray("AliPHOSCPVModule",0)) ) { |
fa412d9b | 77 | Error("AliPHOSv1","Can not create array of CPV modules"); |
78 | exit(1); | |
79 | } | |
fc879520 | 80 | |
bea63bea | 81 | } |
82 | ||
7587f5a5 | 83 | //____________________________________________________________________________ |
84 | AliPHOSv1::AliPHOSv1(const char *name, const char *title): | |
e04976bd | 85 | AliPHOSv0(name,title) |
7587f5a5 | 86 | { |
5f20d3fb | 87 | // ctor : title is used to identify the layout |
fa412d9b | 88 | // GPS2 = 5 modules (EMC + PPSD) |
89 | // IHEP = 5 modules (EMC + CPV ) | |
ed4205d8 | 90 | // MIXT = 4 modules (EMC + CPV ) and 1 module (EMC + PPSD) |
5f20d3fb | 91 | // |
ed4205d8 | 92 | // We store hits : |
5f20d3fb | 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 | // | |
fa412d9b | 97 | |
5f20d3fb | 98 | fPinElectronicNoise = 0.010 ; |
b95514c0 | 99 | fDigitThreshold = 0.1 ; // 1 GeV |
5f20d3fb | 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 | |
fa412d9b | 104 | // and the TreeD at the end of the event (branch is set in FinishEvent() ). |
5f20d3fb | 105 | |
ed4205d8 | 106 | fHits= new TClonesArray("AliPHOSHit",1000) ; |
fc32ab55 | 107 | gAlice->AddHitList(fHits); |
5f20d3fb | 108 | |
ed4205d8 | 109 | fNhits = 0 ; |
5f20d3fb | 110 | |
ed4205d8 | 111 | fReconstructioner = 0; |
112 | fTrackSegmentMaker = 0; | |
5f20d3fb | 113 | |
5f20d3fb | 114 | fIshunt = 1 ; // All hits are associated with primary particles |
fa412d9b | 115 | |
ed4205d8 | 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 | ||
fa412d9b | 125 | // Create array of CPV modules for the IHEP's version of CPV |
126 | ||
ed4205d8 | 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 | |
fa412d9b | 129 | |
ed4205d8 | 130 | if ( 0==(fCPVModules=new TClonesArray("AliPHOSCPVModule",fGeom->GetNCPVModules())) ) { |
fa412d9b | 131 | Error("AliPHOSv1","Can not create array of CPV modules"); |
132 | exit(1); | |
133 | } | |
134 | TClonesArray &lcpvmodule = *fCPVModules; | |
ed4205d8 | 135 | for (Int_t i=0; i<fGeom->GetNCPVModules(); i++) new(lcpvmodule[i]) AliPHOSCPVModule(); |
fa412d9b | 136 | } |
137 | else { | |
3d402178 | 138 | // Create an empty array of AliPHOSCPVModule to satisfy |
fa412d9b | 139 | // AliPHOSv1::Streamer when writing root file |
140 | ||
3d402178 | 141 | fCPVModules=new TClonesArray("AliPHOSCPVModule",0); |
fa412d9b | 142 | |
143 | } | |
5f20d3fb | 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 | ||
ed4205d8 | 166 | fDigits = 0 ; |
167 | fHits= new TClonesArray("AliPHOSHit",1000) ; | |
fc32ab55 | 168 | gAlice->AddHitList(fHits); |
ed4205d8 | 169 | fNhits = 0 ; |
5f20d3fb | 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() ) | |
88bdfa12 | 177 | cout << "AliPHOS" << Version() << " : PHOS geometry intialized for " << fGeom->GetName() << endl ; |
5f20d3fb | 178 | else |
fc879520 | 179 | cout << "AliPHOS" << Version() << " : PHOS geometry initialization failed !" << endl ; |
5f20d3fb | 180 | |
181 | // Defining the PHOS Reconstructioner | |
182 | ||
183 | fReconstructioner = Reconstructioner ; | |
184 | ||
7587f5a5 | 185 | } |
b2a60966 | 186 | |
7587f5a5 | 187 | //____________________________________________________________________________ |
bea63bea | 188 | AliPHOSv1::~AliPHOSv1() |
b2a60966 | 189 | { |
bea63bea | 190 | // dtor |
5f20d3fb | 191 | |
ed4205d8 | 192 | if ( fHits) { |
193 | fHits->Delete() ; | |
194 | delete fHits ; | |
195 | fHits = 0 ; | |
8dfa469d | 196 | } |
5f20d3fb | 197 | |
ed4205d8 | 198 | if ( fDigits) { |
199 | fDigits->Delete() ; | |
200 | delete fDigits ; | |
201 | fDigits = 0 ; | |
202 | } | |
5f20d3fb | 203 | |
ed4205d8 | 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 | ||
7587f5a5 | 222 | } |
223 | ||
7587f5a5 | 224 | //____________________________________________________________________________ |
7eb9d12d | 225 | void AliPHOSv1::AddHit(Int_t shunt, Int_t primary, Int_t tracknumber, Int_t Id, Float_t * hits, Int_t trackpid) |
bea63bea | 226 | { |
227 | // Add a hit to the hit list. | |
5f20d3fb | 228 | // A PHOS hit is the sum of all hits in a single crystal |
229 | // or in a single PPSD gas cell | |
bea63bea | 230 | |
5f20d3fb | 231 | Int_t hitCounter ; |
bea63bea | 232 | AliPHOSHit *newHit ; |
5f20d3fb | 233 | AliPHOSHit *curHit ; |
234 | Bool_t deja = kFALSE ; | |
bea63bea | 235 | |
7eb9d12d | 236 | newHit = new AliPHOSHit(shunt, primary, tracknumber, Id, hits, trackpid) ; |
bea63bea | 237 | |
ed4205d8 | 238 | for ( hitCounter = 0 ; hitCounter < fNhits && !deja ; hitCounter++ ) { |
239 | curHit = (AliPHOSHit*) (*fHits)[hitCounter] ; | |
240 | if( *curHit == *newHit ) { | |
241 | *curHit = *curHit + *newHit ; | |
242 | deja = kTRUE ; | |
5f20d3fb | 243 | } |
244 | } | |
245 | ||
246 | if ( !deja ) { | |
ed4205d8 | 247 | new((*fHits)[fNhits]) AliPHOSHit(*newHit) ; |
248 | fNhits++ ; | |
5f20d3fb | 249 | } |
250 | ||
bea63bea | 251 | delete newHit; |
bea63bea | 252 | } |
253 | ||
5f20d3fb | 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 | } | |
bea63bea | 264 | |
ed4205d8 | 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); | |
bea63bea | 278 | |
ed4205d8 | 279 | gAlice->TreeD()->GetEvent(0); |
280 | ||
5f20d3fb | 281 | |
bea63bea | 282 | Int_t i ; |
283 | Int_t relid[4]; | |
284 | Int_t j ; | |
fa412d9b | 285 | AliPHOSHit * hit ; |
bea63bea | 286 | AliPHOSDigit * newdigit ; |
287 | AliPHOSDigit * curdigit ; | |
288 | Bool_t deja = kFALSE ; | |
289 | ||
ed4205d8 | 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 | } | |
bea63bea | 314 | } |
bea63bea | 315 | |
ed4205d8 | 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 | ||
bea63bea | 328 | Float_t energyandnoise ; |
329 | for ( i = 0 ; i < fNdigits ; i++ ) { | |
330 | newdigit = (AliPHOSDigit * ) fDigits->At(i) ; | |
ed4205d8 | 331 | |
bea63bea | 332 | fGeom->AbsToRelNumbering(newdigit->GetId(), relid) ; |
ed4205d8 | 333 | |
bea63bea | 334 | if (relid[1]==0){ // Digits belong to EMC (PbW0_4 crystals) |
335 | energyandnoise = newdigit->GetAmp() + Digitize(gRandom->Gaus(0., fPinElectronicNoise)) ; | |
ed4205d8 | 336 | |
bea63bea | 337 | if (energyandnoise < 0 ) |
338 | energyandnoise = 0 ; | |
ed4205d8 | 339 | |
bea63bea | 340 | if ( newdigit->GetAmp() < fDigitThreshold ) // if threshold not surpassed, remove digit from list |
341 | fDigits->RemoveAt(i) ; | |
342 | } | |
343 | } | |
ed4205d8 | 344 | |
bea63bea | 345 | fDigits->Compress() ; |
ed4205d8 | 346 | |
347 | fNdigits = fDigits->GetEntries() ; | |
348 | fDigits->Expand(fNdigits) ; | |
bea63bea | 349 | |
bea63bea | 350 | for (i = 0 ; i < fNdigits ; i++) { |
351 | newdigit = (AliPHOSDigit *) fDigits->At(i) ; | |
ed4205d8 | 352 | newdigit->SetIndexInList(i) ; |
bea63bea | 353 | } |
fa412d9b | 354 | |
ed4205d8 | 355 | gAlice->TreeD()->Fill() ; |
5f20d3fb | 356 | |
ed4205d8 | 357 | gAlice->TreeD()->Write(0,TObject::kOverwrite) ; |
358 | ||
359 | } | |
5f20d3fb | 360 | //___________________________________________________________________________ |
361 | void AliPHOSv1::MakeBranch(Option_t* opt) | |
362 | { | |
363 | // Create new branche in the current Root Tree in the digit Tree | |
5f20d3fb | 364 | AliDetector::MakeBranch(opt) ; |
365 | ||
ed4205d8 | 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 | ||
fa412d9b | 370 | // Create new branches CPV<i> for hits in CPV modules for IHEP geometry |
ed4205d8 | 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); | |
fa412d9b | 374 | } |
ed4205d8 | 375 | |
bea63bea | 376 | } |
377 | ||
5f20d3fb | 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 | ||
fc879520 | 396 | fEmcRecPoints->Delete() ; |
5f20d3fb | 397 | |
398 | if ( fEmcRecPoints && gAlice->TreeR() ) { | |
399 | sprintf(branchname,"%sEmcRP",GetName()) ; | |
5f20d3fb | 400 | gAlice->TreeR()->Branch(branchname, "TObjArray", &fEmcRecPoints, fBufferSize, splitlevel) ; |
401 | } | |
402 | ||
fa412d9b | 403 | fPpsdRecPoints->Delete() ; |
5f20d3fb | 404 | |
5f20d3fb | 405 | if ( fPpsdRecPoints && gAlice->TreeR() ) { |
406 | sprintf(branchname,"%sPpsdRP",GetName()) ; | |
5f20d3fb | 407 | gAlice->TreeR()->Branch(branchname, "TObjArray", &fPpsdRecPoints, fBufferSize, splitlevel) ; |
408 | } | |
409 | ||
fc879520 | 410 | fTrackSegments->Delete() ; |
5f20d3fb | 411 | |
5f20d3fb | 412 | if ( fTrackSegments && gAlice->TreeR() ) { |
413 | sprintf(branchname,"%sTS",GetName()) ; | |
414 | gAlice->TreeR()->Branch(branchname, &fTrackSegments, fBufferSize) ; | |
415 | } | |
416 | ||
fa412d9b | 417 | fRecParticles->Delete() ; |
fc879520 | 418 | |
ed4205d8 | 419 | if (strcmp(fGeom->GetName(),"GPS2") == 0 || strcmp(fGeom->GetName(),"MIXT") == 0) { |
fa412d9b | 420 | if ( fRecParticles && gAlice->TreeR() ) { |
421 | sprintf(branchname,"%sRP",GetName()) ; | |
422 | gAlice->TreeR()->Branch(branchname, &fRecParticles, fBufferSize) ; | |
423 | } | |
5f20d3fb | 424 | } |
425 | ||
426 | // 3. | |
ed4205d8 | 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); | |
5f20d3fb | 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) ; | |
ed4205d8 | 438 | |
5f20d3fb | 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() ; | |
5f20d3fb | 449 | // 5. |
450 | ||
4a2ca5e9 | 451 | gAlice->TreeR()->Write(0,TObject::kOverwrite) ; |
5f20d3fb | 452 | |
453 | // Deleting reconstructed objects | |
454 | ResetReconstruction(); | |
455 | ||
456 | } | |
457 | ||
fa412d9b | 458 | //____________________________________________________________________________ |
459 | void AliPHOSv1::ResetHits() | |
c4f224e7 | 460 | { |
ed4205d8 | 461 | // Reset hit tree for EMC and CPV |
fa412d9b | 462 | // Yuri Kharlov, 28 September 2000 |
463 | ||
464 | AliDetector::ResetHits(); | |
ed4205d8 | 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(); | |
5f20d3fb | 468 | } |
ed4205d8 | 469 | |
5f20d3fb | 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 | } | |
5f20d3fb | 482 | |
483 | //____________________________________________________________________________ | |
484 | void AliPHOSv1::SetTreeAddress() | |
485 | { | |
486 | // TBranch *branch; | |
487 | AliPHOS::SetTreeAddress(); | |
488 | ||
ed4205d8 | 489 | // //Branch address for TreeR: RecPpsdRecPoint |
5f20d3fb | 490 | // TTree *treeR = gAlice->TreeR(); |
491 | // if ( treeR && fPpsdRecPoints ) { | |
492 | // branch = treeR->GetBranch("PHOSPpsdRP"); | |
493 | // if (branch) branch->SetAddress(&fPpsdRecPoints) ; | |
fa412d9b | 494 | // } |
495 | ||
ed4205d8 | 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 | ||
fa412d9b | 501 | // Set branch address for the Hits Tree for hits in CPV modules for IHEP geometry |
502 | // Yuri Kharlov, 28 September 2000. | |
503 | ||
ed4205d8 | 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); | |
fa412d9b | 506 | } |
507 | ||
5f20d3fb | 508 | } |
509 | ||
510 | //____________________________________________________________________________ | |
511 | ||
7587f5a5 | 512 | void AliPHOSv1::StepManager(void) |
513 | { | |
b2a60966 | 514 | // Accumulates hits as long as the track stays in a single crystal or PPSD gas Cell |
b2a60966 | 515 | |
ed4205d8 | 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 | ||
7587f5a5 | 521 | Int_t relid[4] ; // (box, layer, row, column) indices |
fa412d9b | 522 | Int_t absid ; // absolute cell ID number |
2168f43b | 523 | Float_t xyze[4]={0,0,0,0} ; // position wrt MRS and energy deposited |
fa412d9b | 524 | TLorentzVector pos ; // Lorentz vector of the track current position |
525 | Int_t copy ; | |
ed4205d8 | 526 | Int_t i ; |
7587f5a5 | 527 | |
bea63bea | 528 | Int_t tracknumber = gAlice->CurrentTrack() ; |
fa412d9b | 529 | Int_t primary = gAlice->GetPrimary( gAlice->CurrentTrack() ); |
530 | TString name = fGeom->GetName() ; | |
7eb9d12d | 531 | Int_t trackpid = gMC->TrackPid() ; |
ed4205d8 | 532 | if ( name == "GPS2" || name == "MIXT" ) { // ======> CPV is a GPS' PPSD |
fa412d9b | 533 | |
b2a60966 | 534 | if( gMC->CurrentVolID(copy) == gMC->VolId("GCEL") ) // We are inside a gas cell |
7587f5a5 | 535 | { |
536 | gMC->TrackPosition(pos) ; | |
537 | xyze[0] = pos[0] ; | |
538 | xyze[1] = pos[1] ; | |
539 | xyze[2] = pos[2] ; | |
bea63bea | 540 | xyze[3] = gMC->Edep() ; |
7587f5a5 | 541 | |
542 | if ( xyze[3] != 0 ) { // there is deposited energy | |
543 | gMC->CurrentVolOffID(5, relid[0]) ; // get the PHOS Module number | |
ed4205d8 | 544 | if ( name == "MIXT" && strcmp(gMC->CurrentVolOffName(5),"PHO1") == 0 ) |
545 | relid[0] += fGeom->GetNModules() - fGeom->GetNPPSDModules(); | |
7587f5a5 | 546 | gMC->CurrentVolOffID(3, relid[1]) ; // get the Micromegas Module number |
ed4205d8 | 547 | // 1-> fGeom->GetNumberOfModulesPhi() * fGeom->GetNumberOfModulesZ() upper |
548 | // > fGeom->GetNumberOfModulesPhi() * fGeom->GetNumberOfModulesZ() lower | |
7587f5a5 | 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 | ||
bea63bea | 554 | fGeom->RelToAbsNumbering(relid, absid) ; |
7587f5a5 | 555 | |
bea63bea | 556 | // add current hit to the hit list |
7eb9d12d | 557 | AddHit(fIshunt, primary, tracknumber, absid, xyze, trackpid); |
7587f5a5 | 558 | |
559 | } // there is deposited energy | |
fa412d9b | 560 | } // We are inside the gas of the CPV |
561 | } // GPS2 configuration | |
562 | ||
ed4205d8 | 563 | if ( name == "IHEP" || name == "MIXT" ) { // ======> CPV is a IHEP's one |
fa412d9b | 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 | ||
a3dfe79c | 573 | AliPHOSv1 &phos = *(AliPHOSv1*)gAlice->GetModule("PHOS"); |
fa412d9b | 574 | |
a3dfe79c | 575 | Int_t moduleNumber; |
576 | gMC->CurrentVolOffID(3,moduleNumber); | |
577 | moduleNumber--; | |
fa412d9b | 578 | |
579 | // Current position of the hit in the CPV module ref. system | |
580 | ||
581 | gMC -> TrackPosition(pos); | |
2168f43b | 582 | Float_t xyzm[3], xyzd[3], xyd[3]={0,0,0}; |
cd461ab8 | 583 | Int_t i; |
584 | for (i=0; i<3; i++) xyzm[i] = pos[i]; | |
fa412d9b | 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]; | |
cd461ab8 | 594 | for (i=0; i<3; i++) pm[i] = pmom[i]; |
fa412d9b | 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 | ||
ed4205d8 | 606 | phos.GetCPVModule(moduleNumber).AddHit(fIshunt,primary,pmom,xyd,ipart); |
fa412d9b | 607 | |
ed4205d8 | 608 | if (fDebug == 1) { |
a3dfe79c | 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()); | |
ed4205d8 | 611 | printf( " xy = (%8.4f, %8.4f) cm, ipart = %d, primary = %d\n", |
612 | xyd[0],xyd[1],ipart,primary); | |
a3dfe79c | 613 | } |
fa412d9b | 614 | |
615 | // Digitize the current CPV hit: | |
616 | ||
617 | // 1. find pad response and | |
618 | ||
3d402178 | 619 | TClonesArray *cpvDigits = new TClonesArray("AliPHOSCPVDigit",0); // array of digits for current hit |
a3dfe79c | 620 | CPVDigitize(pmom,xyd,moduleNumber,cpvDigits); |
fa412d9b | 621 | |
622 | Float_t xmean = 0; | |
623 | Float_t zmean = 0; | |
624 | Float_t qsum = 0; | |
cd461ab8 | 625 | Int_t idigit,ndigits; |
fa412d9b | 626 | |
627 | // 2. go through the current digit list and sum digits in pads | |
628 | ||
629 | ndigits = cpvDigits->GetEntriesFast(); | |
cd461ab8 | 630 | for (idigit=0; idigit<ndigits-1; idigit++) { |
3d402178 | 631 | AliPHOSCPVDigit *cpvDigit1 = (AliPHOSCPVDigit*) cpvDigits->UncheckedAt(idigit); |
fa412d9b | 632 | Float_t x1 = cpvDigit1->GetXpad() ; |
633 | Float_t z1 = cpvDigit1->GetYpad() ; | |
634 | for (Int_t jdigit=idigit+1; jdigit<ndigits; jdigit++) { | |
3d402178 | 635 | AliPHOSCPVDigit *cpvDigit2 = (AliPHOSCPVDigit*) cpvDigits->UncheckedAt(jdigit); |
fa412d9b | 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(); | |
cd461ab8 | 650 | for (idigit=0; idigit<ndigits; idigit++) { |
3d402178 | 651 | AliPHOSCPVDigit *cpvDigit = (AliPHOSCPVDigit*) cpvDigits->UncheckedAt(idigit); |
a3dfe79c | 652 | relid[0] = moduleNumber + 1 ; // CPV (or PHOS) module number |
fa412d9b | 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 | |
7eb9d12d | 666 | AddHit(fIshunt, primary, tracknumber, absid, xyze, trackpid); |
fa412d9b | 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 | |
7587f5a5 | 677 | |
fa412d9b | 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() ; | |
ed4205d8 | 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; | |
76eb93f7 | 692 | Float_t xyd[3]={0,0,0}; |
ed4205d8 | 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 | ||
fa412d9b | 738 | if ( xyze[3] != 0 ) { |
739 | gMC->CurrentVolOffID(10, relid[0]) ; // get the PHOS module number ; | |
ed4205d8 | 740 | if ( name == "MIXT" && strcmp(gMC->CurrentVolOffName(5),"PHO1") == 0 ) |
741 | relid[0] += fGeom->GetNModules() - fGeom->GetNPPSDModules(); | |
fa412d9b | 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) ; | |
ed4205d8 | 749 | |
fa412d9b | 750 | // add current hit to the hit list |
751 | ||
7eb9d12d | 752 | AddHit(fIshunt, primary,tracknumber, absid, xyze, trackpid); |
ed4205d8 | 753 | |
fa412d9b | 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 | ||
a3dfe79c | 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 | |
fa412d9b | 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(); | |
a3dfe79c | 790 | Float_t eloss = kdEdx; |
3d402178 | 791 | |
7eb9d12d | 792 | // cout << "CPVDigitize: YVK : "<<hitX<<" "<<hitZ<<" | "<<pX<<" "<<pZ<<" "<<pNorm<<endl; |
793 | ||
fa412d9b | 794 | Float_t dZY = pZ/pNorm * fGeom->GetCPVGasThickness(); |
795 | Float_t dXY = pX/pNorm * fGeom->GetCPVGasThickness(); | |
796 | gRandom->Rannor(rnor1,rnor2); | |
a3dfe79c | 797 | eloss *= (1 + kDetR*rnor1) * |
798 | TMath::Sqrt((1 + ( pow(dZY,2) + pow(dXY,2) ) / pow(fGeom->GetCPVGasThickness(),2))); | |
fa412d9b | 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 | ||
a3dfe79c | 804 | Int_t iwht1 = (Int_t) (xhit1 / kCelWr); // wire (x) coordinate "in" |
805 | Int_t iwht2 = (Int_t) (xhit2 / kCelWr); // wire (x) coordinate "out" | |
fa412d9b | 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; | |
a3dfe79c | 812 | zxe[1][0] = (iwht1 + 0.5) * kCelWr; |
813 | zxe[2][0] = eloss/2; | |
fa412d9b | 814 | zxe[0][1] = (zhit1 + zhit2 + dZY*0.57735) / 2; |
a3dfe79c | 815 | zxe[1][1] = (iwht1 + 0.5) * kCelWr; |
816 | zxe[2][1] = eloss/2; | |
fa412d9b | 817 | } |
818 | else if (TMath::Abs(iwht1-iwht2) != 1) { // incline 3-wire hit | |
819 | nIter = 3; | |
820 | Int_t iwht3 = (iwht1 + iwht2) / 2; | |
a3dfe79c | 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 | |
fa412d9b | 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; | |
a3dfe79c | 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 ); | |
fa412d9b | 831 | zxe[0][0] = (dXY*(xwr13-xwht1)/dXY + zhit1 + zhit1) / 2; |
832 | zxe[1][0] = xwht1; | |
a3dfe79c | 833 | zxe[2][0] = eloss * egm1; |
fa412d9b | 834 | zxe[0][1] = (dXY*(xwr23-xwht1)/dXY + zhit1 + zhit2) / 2; |
835 | zxe[1][1] = xwht2; | |
a3dfe79c | 836 | zxe[2][1] = eloss * egm2; |
fa412d9b | 837 | zxe[0][2] = dXY*(xwht3-xwht1)/dXY + zhit1; |
838 | zxe[1][2] = xwht3; | |
a3dfe79c | 839 | zxe[2][2] = eloss * egm3; |
fa412d9b | 840 | } |
841 | else { // incline 2-wire hit | |
842 | nIter = 2; | |
a3dfe79c | 843 | Float_t xwht1 = (iwht1 + 0.5) * kCelWr; |
844 | Float_t xwht2 = (iwht2 + 0.5) * kCelWr; | |
fa412d9b | 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; | |
a3dfe79c | 852 | zxe[2][0] = eloss * egm1; |
fa412d9b | 853 | zxe[0][1] = (zhit1 + zhit2 + dZY*egm2) / 2; |
854 | zxe[1][1] = xwht2; | |
a3dfe79c | 855 | zxe[2][1] = eloss * egm2; |
fa412d9b | 856 | } |
bea63bea | 857 | |
fa412d9b | 858 | // Finite size of ionization region |
859 | ||
ed4205d8 | 860 | Int_t nCellZ = fGeom->GetNumberOfCPVPadsZ(); |
861 | Int_t nCellX = fGeom->GetNumberOfCPVPadsPhi(); | |
a3dfe79c | 862 | Int_t nz3 = (kNgamz+1)/2; |
863 | Int_t nx3 = (kNgamx+1)/2; | |
864 | cpvDigits->Expand(nIter*kNgamx*kNgamz); | |
fa412d9b | 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; | |
a3dfe79c | 880 | for (Int_t iz=1; iz<=kNgamz; iz++) { |
fa412d9b | 881 | Int_t kzg = izcell + iz - nz3; |
882 | if (kzg<=0 || kzg>nCellZ) continue; | |
883 | Float_t zg = (Float_t)(iz-nz3) - zc; | |
a3dfe79c | 884 | for (Int_t ix=1; ix<=kNgamx; ix++) { |
fa412d9b | 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); | |
a3dfe79c | 891 | qpad += kNoise*rnor2; |
fa412d9b | 892 | if (qpad<0) continue; |
893 | ||
894 | // Fill the array with pad response ID and amplitude | |
3d402178 | 895 | new(ldigits[cpvDigits->GetEntriesFast()]) AliPHOSCPVDigit(kxg,kzg,qpad); |
fa412d9b | 896 | } |
fa412d9b | 897 | } |
fa412d9b | 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; | |
7587f5a5 | 918 | } |
919 | ||
fa412d9b | 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 | ||
a3dfe79c | 932 | const Double_t kA=1.0; |
933 | const Double_t kB=0.7; | |
fa412d9b | 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++) { | |
a3dfe79c | 939 | Double_t b1 = (2*i + 1) * kB; |
fa412d9b | 940 | cumulPRF += TMath::Power(-1,i) * TMath::ATan( xy / (b1*TMath::Sqrt(b1*b1 + r2)) ); |
941 | } | |
a3dfe79c | 942 | cumulPRF *= kA/(2*TMath::Pi()); |
fa412d9b | 943 | return cumulPRF; |
944 | } | |
7eb9d12d | 945 |