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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 + CPV has name IHEP: | |
22 | // Produces hits for CPV, cumulated hits | |
23 | //--- | |
24 | //*-- Author: Yves Schutz (SUBATECH) | |
25 | ||
26 | ||
27 | // --- ROOT system --- | |
28 | ||
29 | #include "TBRIK.h" | |
30 | #include "TNode.h" | |
31 | #include "TRandom.h" | |
32 | #include "TTree.h" | |
33 | ||
34 | ||
35 | // --- Standard library --- | |
36 | ||
37 | #include <stdio.h> | |
38 | #include <string.h> | |
39 | #include <stdlib.h> | |
40 | #include <strstream.h> | |
41 | ||
42 | // --- AliRoot header files --- | |
43 | ||
44 | #include "AliPHOSv1.h" | |
45 | #include "AliPHOSHit.h" | |
46 | #include "AliPHOSDigit.h" | |
47 | #include "AliPHOSReconstructor.h" | |
48 | #include "AliRun.h" | |
49 | #include "AliConst.h" | |
50 | ||
51 | ClassImp(AliPHOSv1) | |
52 | ||
53 | //____________________________________________________________________________ | |
54 | AliPHOSv1::AliPHOSv1(): | |
55 | AliPHOSv0() | |
56 | { | |
57 | // ctor | |
58 | ||
59 | fReconstructioner = 0; | |
60 | fTrackSegmentMaker = 0; | |
61 | ||
62 | } | |
63 | ||
64 | //____________________________________________________________________________ | |
65 | AliPHOSv1::AliPHOSv1(const char *name, const char *title): | |
66 | AliPHOSv0(name,title) | |
67 | { | |
68 | // ctor : title is used to identify the layout | |
69 | // IHEP = 5 modules (EMC + CPV ) | |
70 | // | |
71 | // We store hits : | |
72 | // - fHits (the "normal" one), which retains the hits associated with | |
73 | // the current primary particle being tracked | |
74 | // (this array is reset after each primary has been tracked). | |
75 | // | |
76 | ||
77 | fPinElectronicNoise = 0.010 ; | |
78 | fDigitThreshold = 0.01 ; // 1 GeV | |
79 | fDigitizeA= 0. ; | |
80 | fDigitizeB = 10000000. ; | |
81 | ||
82 | ||
83 | // We do not want to save in TreeH the raw hits | |
84 | // But save the cumulated hits instead (need to create the branch myself) | |
85 | // It is put in the Digit Tree because the TreeH is filled after each primary | |
86 | // and the TreeD at the end of the event (branch is set in FinishEvent() ). | |
87 | ||
88 | fHits= new TClonesArray("AliPHOSHit",1000) ; | |
89 | ||
90 | fNhits = 0 ; | |
91 | ||
92 | fReconstructioner = 0; | |
93 | fTrackSegmentMaker = 0; | |
94 | ||
95 | fIshunt = 1 ; // All hits are associated with primary particles | |
96 | ||
97 | } | |
98 | ||
99 | //____________________________________________________________________________ | |
100 | AliPHOSv1::AliPHOSv1(AliPHOSReconstructor * Reconstructioner, const char *name, const char *title): | |
101 | AliPHOSv0(name,title) | |
102 | { | |
103 | // ctor : title is used to identify the layout | |
104 | ||
105 | fPinElectronicNoise = 0.010 ; | |
106 | ||
107 | // We do not want to save in TreeH the raw hits | |
108 | ||
109 | fDigits = 0 ; | |
110 | fHits= new TClonesArray("AliPHOSHit",1000) ; | |
111 | ||
112 | fNhits = 0 ; | |
113 | ||
114 | fIshunt = 1 ; // All hits are associated with primary particles | |
115 | ||
116 | // gets an instance of the geometry parameters class | |
117 | AliPHOSGeometry::GetInstance(title, "") ; | |
118 | ||
119 | if (GetGeometry()->IsInitialized() ) | |
120 | Info("AliPHOSv1", "AliPHOS %d : PHOS geometry intialized for %s", Version(), GetGeometry()->GetName() ); | |
121 | else | |
122 | Info("AliPHOSv1", "AliPHOS %d : PHOS geometry initialization failed !", Version() ) ; | |
123 | ||
124 | // Defining the PHOS Reconstructioner | |
125 | ||
126 | fReconstructioner = Reconstructioner ; | |
127 | ||
128 | } | |
129 | ||
130 | //____________________________________________________________________________ | |
131 | AliPHOSv1::~AliPHOSv1() | |
132 | { | |
133 | // dtor | |
134 | ||
135 | if ( fHits) { | |
136 | fHits->Delete() ; | |
137 | delete fHits ; | |
138 | fHits = 0 ; | |
139 | } | |
140 | ||
141 | if ( fSDigits) { | |
142 | fSDigits->Delete() ; | |
143 | delete fSDigits ; | |
144 | fSDigits = 0 ; | |
145 | } | |
146 | ||
147 | if ( fDigits) { | |
148 | fDigits->Delete() ; | |
149 | delete fDigits ; | |
150 | fDigits = 0 ; | |
151 | } | |
152 | ||
153 | if ( fEmcRecPoints ) { | |
154 | fEmcRecPoints->Delete() ; | |
155 | delete fEmcRecPoints ; | |
156 | fEmcRecPoints = 0 ; | |
157 | } | |
158 | ||
159 | if ( fPpsdRecPoints ) { | |
160 | fPpsdRecPoints->Delete() ; | |
161 | delete fPpsdRecPoints ; | |
162 | fPpsdRecPoints = 0 ; | |
163 | } | |
164 | ||
165 | if ( fTrackSegments ) { | |
166 | fTrackSegments->Delete() ; | |
167 | delete fTrackSegments ; | |
168 | fTrackSegments = 0 ; | |
169 | } | |
170 | ||
171 | } | |
172 | ||
173 | //____________________________________________________________________________ | |
174 | void AliPHOSv1::AddHit(Int_t shunt, Int_t primary, Int_t tracknumber, Int_t Id, Float_t * hits, Int_t trackpid, TLorentzVector p, Float_t * lpos) | |
175 | { | |
176 | // Add a hit to the hit list. | |
177 | // A PHOS hit is the sum of all hits in a single crystal | |
178 | // or in a single PPSD gas cell | |
179 | ||
180 | Int_t hitCounter ; | |
181 | AliPHOSHit *newHit ; | |
182 | AliPHOSHit *curHit ; | |
183 | Bool_t deja = kFALSE ; | |
184 | ||
185 | newHit = new AliPHOSHit(shunt, primary, tracknumber, Id, hits, trackpid, p, lpos) ; | |
186 | ||
187 | for ( hitCounter = fNhits-1 ; hitCounter >= 0 && !deja ; hitCounter-- ) { | |
188 | curHit = (AliPHOSHit*) (*fHits)[hitCounter] ; | |
189 | if( *curHit == *newHit ) { | |
190 | *curHit = *curHit + *newHit ; | |
191 | deja = kTRUE ; | |
192 | } | |
193 | } | |
194 | ||
195 | if ( !deja ) { | |
196 | new((*fHits)[fNhits]) AliPHOSHit(*newHit) ; | |
197 | fNhits++ ; | |
198 | } | |
199 | ||
200 | delete newHit; | |
201 | } | |
202 | ||
203 | //____________________________________________________________________________ | |
204 | void AliPHOSv1::Hits2SDigits() | |
205 | { | |
206 | // Collects all hits in the same active volume into digit | |
207 | // OBSOLETE replace by SDigitizer | |
208 | ||
209 | Int_t i ; | |
210 | Int_t j ; | |
211 | AliPHOSHit * hit ; | |
212 | AliPHOSDigit * newdigit ; | |
213 | AliPHOSDigit * curdigit ; | |
214 | Bool_t deja = kFALSE ; | |
215 | ||
216 | ||
217 | Int_t itrack ; | |
218 | for (itrack=0; itrack<gAlice->GetNtrack(); itrack++){ | |
219 | ||
220 | //=========== Get the Hits Tree for the Primary track itrack | |
221 | gAlice->ResetHits(); | |
222 | if (TreeH() == 0x0) | |
223 | { | |
224 | Error("Hits2SDigits","Can not find TreeH in the folder"); | |
225 | return; | |
226 | } | |
227 | TreeH()->GetEvent(itrack); | |
228 | ||
229 | ||
230 | for ( i = 0 ; i < fHits->GetEntries() ; i++ ) { | |
231 | hit = (AliPHOSHit*)fHits->At(i) ; | |
232 | ||
233 | // Assign primary number only if contribution is significant | |
234 | if( hit->GetEnergy() > fDigitThreshold) | |
235 | newdigit = new AliPHOSDigit( hit->GetPrimary(), hit->GetId(), Digitize( hit->GetEnergy() ) ) ; | |
236 | else | |
237 | newdigit = new AliPHOSDigit( -1 , hit->GetId(), Digitize( hit->GetEnergy() ) ) ; | |
238 | deja =kFALSE ; | |
239 | ||
240 | for ( j = 0 ; j < fnSdigits ; j++) { | |
241 | curdigit = (AliPHOSDigit*) fSDigits->At(j) ; | |
242 | if ( *curdigit == *newdigit) { | |
243 | *curdigit = *curdigit + *newdigit ; | |
244 | deja = kTRUE ; | |
245 | } | |
246 | } | |
247 | ||
248 | if ( !deja ) { | |
249 | new((*fSDigits)[fnSdigits]) AliPHOSDigit(* newdigit) ; | |
250 | fnSdigits++ ; | |
251 | } | |
252 | ||
253 | delete newdigit ; | |
254 | } | |
255 | ||
256 | } // loop over tracks | |
257 | ||
258 | fSDigits->Sort() ; | |
259 | ||
260 | fnSdigits = fSDigits->GetEntries() ; | |
261 | fSDigits->Expand(fnSdigits) ; | |
262 | ||
263 | for (i = 0 ; i < fnSdigits ; i++) { | |
264 | AliPHOSDigit * digit = (AliPHOSDigit *) fSDigits->At(i) ; | |
265 | digit->SetIndexInList(i) ; | |
266 | } | |
267 | ||
268 | gAlice->TreeS()->Fill() ; | |
269 | gAlice->TreeS()->Write(0,TObject::kOverwrite) ; | |
270 | ||
271 | ||
272 | } | |
273 | //____________________________________________________________________________ | |
274 | void AliPHOSv1::SDigits2Digits() | |
275 | { | |
276 | // Adds noise to the summable digits and removes everething below thresholds | |
277 | // Note, that sDigits should be SORTED in accordance with abs ID. | |
278 | // OBSOLETE Replaced by Digitzer | |
279 | ||
280 | gAlice->TreeS()->GetEvent(0) ; | |
281 | ||
282 | // First calculate noise induced by the PIN diode of the PbWO crystals | |
283 | Int_t iCurSDigit = 0 ; | |
284 | ||
285 | //we assume, that there is al least one EMC digit... | |
286 | if(fSDigits->GetEntries() == 0) { | |
287 | Warning("SDigits2Digits", "No SDigits !!! Do not produce Digits ") ; | |
288 | return ; | |
289 | } | |
290 | ||
291 | Int_t idCurSDigit = ((AliPHOSDigit *)fSDigits->At(0))->GetId() ; | |
292 | ||
293 | Int_t absID ; | |
294 | for(absID = 1; absID < GetGeometry()->GetNModules()*GetGeometry()->GetNPhi()*GetGeometry()->GetNZ(); absID++){ | |
295 | Float_t noise = gRandom->Gaus(0., fPinElectronicNoise) ; | |
296 | if(absID < idCurSDigit ){ | |
297 | if(noise >fDigitThreshold ){ | |
298 | new((*fDigits)[fNdigits]) AliPHOSDigit( -1,absID,Digitize(noise) ) ; | |
299 | fNdigits++ ; | |
300 | } | |
301 | } | |
302 | else{ //add noise and may be remove the true hit | |
303 | Float_t signal = noise + Calibrate(((AliPHOSDigit *)fSDigits->At(iCurSDigit))->GetAmp()) ; | |
304 | if( signal >fDigitThreshold ){ | |
305 | AliPHOSDigit * digit = (AliPHOSDigit*) fSDigits->At(iCurSDigit) ; | |
306 | new((*fDigits)[fNdigits]) AliPHOSDigit( *digit ) ; | |
307 | ((AliPHOSDigit *)fDigits->At(fNdigits))->SetAmp(Digitize(signal)); | |
308 | fNdigits++ ; | |
309 | } | |
310 | ||
311 | if(iCurSDigit < fSDigits->GetEntries()-1){ | |
312 | iCurSDigit++ ; | |
313 | idCurSDigit = ((AliPHOSDigit*)fSDigits->At(iCurSDigit))->GetId() ; | |
314 | } | |
315 | else | |
316 | idCurSDigit = 10000000; //no real hits left | |
317 | } | |
318 | ||
319 | } | |
320 | ||
321 | //remove PPSD/CPV digits below thresholds | |
322 | Int_t idigit ; | |
323 | for(idigit = iCurSDigit; idigit < fSDigits->GetEntries() ; idigit++){ //loop over CPV/PPSD digits | |
324 | ||
325 | AliPHOSDigit * digit = (AliPHOSDigit *) fSDigits->At(idigit) ; | |
326 | Float_t ene = Calibrate(digit->GetAmp()) ; | |
327 | ||
328 | Int_t relid[4] ; | |
329 | GetGeometry()->AbsToRelNumbering(digit->GetId(), relid) ; | |
330 | if ( relid[0] > GetGeometry()->GetNCPVModules() ){ //ppsd | |
331 | if ( ( (relid[1] > 0) && (ene > fPpsdEnergyThreshold)) || //PPSD digit | |
332 | ( (relid[1] < 0) && (ene > fCpvEnergyThreshold ) ) ) //CPV digit | |
333 | new((*fDigits)[fNdigits]) AliPHOSDigit( *digit ) ; | |
334 | fNdigits++ ; | |
335 | } | |
336 | } | |
337 | ||
338 | fDigits->Compress() ; | |
339 | ||
340 | fNdigits = fDigits->GetEntries() ; | |
341 | fDigits->Expand(fNdigits) ; | |
342 | ||
343 | Int_t i ; | |
344 | for (i = 0 ; i < fNdigits ; i++) { | |
345 | AliPHOSDigit * digit = (AliPHOSDigit *) fDigits->At(i) ; | |
346 | digit->SetIndexInList(i) ; | |
347 | } | |
348 | ||
349 | gAlice->TreeD()->Fill() ; | |
350 | ||
351 | gAlice->TreeD()->Write(0,TObject::kOverwrite) ; | |
352 | ||
353 | } | |
354 | ||
355 | //___________________________________________________________________________ | |
356 | void AliPHOSv1::MakeBranch(Option_t* opt, char *file) | |
357 | { | |
358 | // Called by AliRun | |
359 | ||
360 | char *cH ; | |
361 | // Create new branche in the current Root Tree in the digit Tree | |
362 | AliDetector::MakeBranch(opt) ; | |
363 | ||
364 | ||
365 | cH = strstr(opt,"S"); | |
366 | //Create a branch for SDigits | |
367 | if( cH ){ | |
368 | char branchname[20]; | |
369 | sprintf(branchname,"%s",GetName()); | |
370 | if(fSDigits) | |
371 | fSDigits->Clear(); | |
372 | ||
373 | fnSdigits = 0 ; | |
374 | gAlice->MakeBranchInTree(gAlice->TreeS(),branchname,&fSDigits,fBufferSize,file); | |
375 | } | |
376 | ||
377 | cH = strstr(opt,"D"); | |
378 | //Create a branch for Digits | |
379 | if( cH ){ | |
380 | char branchname[20]; | |
381 | sprintf(branchname,"%s",GetName()); | |
382 | ||
383 | if(fDigits) | |
384 | fDigits->Clear(); | |
385 | ||
386 | gAlice->MakeBranchInTree(gAlice->TreeD(),branchname,&fDigits,fBufferSize,file); | |
387 | } | |
388 | ||
389 | cH = strstr(opt,"R"); | |
390 | //Create a branch for Reconstruction | |
391 | if( cH ){ | |
392 | char branchname[20]; | |
393 | ||
394 | Int_t splitlevel = 0 ; | |
395 | ||
396 | if(fEmcRecPoints) | |
397 | fEmcRecPoints->Delete() ; | |
398 | ||
399 | if ( fEmcRecPoints && gAlice->TreeR() ) { | |
400 | sprintf(branchname,"%sEmcRP",GetName()) ; | |
401 | gAlice->MakeBranchInTree(gAlice->TreeR(),branchname,"TObjArray",&fEmcRecPoints, fBufferSize, splitlevel,file); | |
402 | } | |
403 | ||
404 | if(fPpsdRecPoints) | |
405 | fPpsdRecPoints->Delete() ; | |
406 | ||
407 | if ( fPpsdRecPoints && gAlice->TreeR() ) { | |
408 | sprintf(branchname,"%sPpsdRP",GetName()) ; | |
409 | gAlice->MakeBranchInTree(gAlice->TreeR(),branchname,"TObjArray",&fPpsdRecPoints, fBufferSize, splitlevel,file); | |
410 | } | |
411 | ||
412 | if(fTrackSegments) | |
413 | fTrackSegments->Clear() ; | |
414 | ||
415 | if ( fTrackSegments && gAlice->TreeR() ) { | |
416 | sprintf(branchname,"%sTS",GetName()) ; | |
417 | gAlice->MakeBranchInTree(gAlice->TreeR(),branchname,&fTrackSegments,fBufferSize,file); | |
418 | } | |
419 | ||
420 | if(fRecParticles) | |
421 | fRecParticles->Clear() ; | |
422 | ||
423 | if ( fRecParticles && gAlice->TreeR() ) { | |
424 | sprintf(branchname,"%sRP",GetName()) ; | |
425 | gAlice->MakeBranchInTree(gAlice->TreeR(),branchname,&fRecParticles,fBufferSize,file); | |
426 | } | |
427 | ||
428 | } | |
429 | ||
430 | } | |
431 | ||
432 | //_____________________________________________________________________________ | |
433 | void AliPHOSv1::Reconstruction(AliPHOSReconstructor * Reconstructioner) | |
434 | { | |
435 | // 1. Reinitializes the existing RecPoint, TrackSegment, and RecParticles Lists and | |
436 | // 2. Creates TreeR with a branch for each list | |
437 | // 3. Steers the reconstruction processes | |
438 | // 4. Saves the 3 lists in TreeR | |
439 | // 5. Write the Tree to File | |
440 | ||
441 | fReconstructioner = Reconstructioner ; | |
442 | ||
443 | // 1. | |
444 | ||
445 | // gAlice->MakeTree("R") ; | |
446 | ||
447 | MakeBranch("R") ; | |
448 | ||
449 | // 3. | |
450 | ||
451 | fReconstructioner->Make(fDigits, fEmcRecPoints, fPpsdRecPoints, fTrackSegments, fRecParticles); | |
452 | ||
453 | printf("Reconstruction: %d %d %d %d\n", | |
454 | fEmcRecPoints->GetEntries(),fPpsdRecPoints->GetEntries(), | |
455 | fTrackSegments->GetEntries(),fRecParticles->GetEntries()); | |
456 | ||
457 | // 4. Expand or Shrink the arrays to the proper size | |
458 | ||
459 | Int_t size ; | |
460 | ||
461 | size = fEmcRecPoints->GetEntries() ; | |
462 | fEmcRecPoints->Expand(size) ; | |
463 | ||
464 | size = fPpsdRecPoints->GetEntries() ; | |
465 | fPpsdRecPoints->Expand(size) ; | |
466 | ||
467 | size = fTrackSegments->GetEntries() ; | |
468 | fTrackSegments->Expand(size) ; | |
469 | ||
470 | size = fRecParticles->GetEntries() ; | |
471 | fRecParticles->Expand(size) ; | |
472 | ||
473 | gAlice->TreeR()->Fill() ; | |
474 | // 5. | |
475 | ||
476 | gAlice->TreeR()->Write(0,TObject::kOverwrite) ; | |
477 | ||
478 | // Deleting reconstructed objects | |
479 | ResetReconstruction(); | |
480 | ||
481 | } | |
482 | ||
483 | //____________________________________________________________________________ | |
484 | void AliPHOSv1::ResetReconstruction() | |
485 | { | |
486 | // Deleting reconstructed objects | |
487 | ||
488 | if ( fEmcRecPoints ) fEmcRecPoints ->Delete(); | |
489 | if ( fPpsdRecPoints ) fPpsdRecPoints->Delete(); | |
490 | if ( fTrackSegments ) fTrackSegments->Delete(); | |
491 | if ( fRecParticles ) fRecParticles ->Delete(); | |
492 | ||
493 | } | |
494 | ||
495 | //____________________________________________________________________________ | |
496 | ||
497 | void AliPHOSv1::StepManager(void) | |
498 | { | |
499 | // Accumulates hits as long as the track stays in a single crystal or PPSD gas Cell | |
500 | ||
501 | Int_t relid[4] ; // (box, layer, row, column) indices | |
502 | Int_t absid ; // absolute cell ID number | |
503 | Float_t xyze[4]={0,0,0,0} ; // position wrt MRS and energy deposited | |
504 | TLorentzVector pos ; // Lorentz vector of the track current position | |
505 | TLorentzVector pmom ; //momentum of the particle initiated hit | |
506 | Float_t xyd[3]={0,0,0} ; //local posiiton of the entering | |
507 | Bool_t entered = kFALSE ; | |
508 | Int_t copy ; | |
509 | ||
510 | Int_t tracknumber = gAlice->GetCurrentTrackNumber() ; | |
511 | Int_t primary = gAlice->GetPrimary( gAlice->GetCurrentTrackNumber() ); | |
512 | TString name = GetGeometry()->GetName() ; | |
513 | Int_t trackpid = 0 ; | |
514 | ||
515 | if( gMC->IsTrackEntering() ){ // create hit with position and momentum of new particle, | |
516 | // but may be without energy deposition | |
517 | ||
518 | // Current position of the hit in the local ref. system | |
519 | gMC -> TrackPosition(pos); | |
520 | Float_t xyzm[3], xyzd[3] ; | |
521 | Int_t i; | |
522 | for (i=0; i<3; i++) xyzm[i] = pos[i]; | |
523 | gMC -> Gmtod (xyzm, xyzd, 1); // transform coordinate from master to daughter system | |
524 | xyd[0] = xyzd[0]; | |
525 | xyd[1] =-xyzd[1]; | |
526 | xyd[2] =-xyzd[2]; | |
527 | ||
528 | ||
529 | // Current momentum of the hit's track in the local ref. system | |
530 | gMC -> TrackMomentum(pmom); | |
531 | Float_t pm[3], pd[3]; | |
532 | for (i=0; i<3; i++) pm[i] = pmom[i]; | |
533 | gMC -> Gmtod (pm, pd, 2); // transform 3-momentum from master to daughter system | |
534 | pmom[0] = pd[0]; | |
535 | pmom[1] =-pd[1]; | |
536 | pmom[2] =-pd[2]; | |
537 | ||
538 | trackpid = gMC->TrackPid(); | |
539 | entered = kTRUE ; // Mark to create hit even withou energy deposition | |
540 | ||
541 | } | |
542 | ||
543 | ||
544 | if ( name == "IHEP" ) { // ======> CPV is a IHEP's one | |
545 | ||
546 | // Yuri Kharlov, 28 September 2000 | |
547 | ||
548 | static Int_t idPCPQ = gMC->VolId("PCPQ"); | |
549 | if( gMC->CurrentVolID(copy) == idPCPQ && | |
550 | entered && | |
551 | gMC->TrackCharge() != 0) { | |
552 | ||
553 | // Digitize the current CPV hit: | |
554 | ||
555 | // 1. find pad response and | |
556 | ||
557 | Int_t moduleNumber; | |
558 | gMC->CurrentVolOffID(3,moduleNumber); | |
559 | moduleNumber--; | |
560 | ||
561 | ||
562 | TClonesArray *cpvDigits = new TClonesArray("AliPHOSCPVDigit",0); // array of digits for current hit | |
563 | CPVDigitize(pmom,xyd,moduleNumber,cpvDigits); | |
564 | ||
565 | Float_t xmean = 0; | |
566 | Float_t zmean = 0; | |
567 | Float_t qsum = 0; | |
568 | Int_t idigit,ndigits; | |
569 | ||
570 | // 2. go through the current digit list and sum digits in pads | |
571 | ||
572 | ndigits = cpvDigits->GetEntriesFast(); | |
573 | for (idigit=0; idigit<ndigits-1; idigit++) { | |
574 | AliPHOSCPVDigit *cpvDigit1 = (AliPHOSCPVDigit*) cpvDigits->UncheckedAt(idigit); | |
575 | Float_t x1 = cpvDigit1->GetXpad() ; | |
576 | Float_t z1 = cpvDigit1->GetYpad() ; | |
577 | for (Int_t jdigit=idigit+1; jdigit<ndigits; jdigit++) { | |
578 | AliPHOSCPVDigit *cpvDigit2 = (AliPHOSCPVDigit*) cpvDigits->UncheckedAt(jdigit); | |
579 | Float_t x2 = cpvDigit2->GetXpad() ; | |
580 | Float_t z2 = cpvDigit2->GetYpad() ; | |
581 | if (x1==x2 && z1==z2) { | |
582 | Float_t qsum = cpvDigit1->GetQpad() + cpvDigit2->GetQpad() ; | |
583 | cpvDigit2->SetQpad(qsum) ; | |
584 | cpvDigits->RemoveAt(idigit) ; | |
585 | } | |
586 | } | |
587 | } | |
588 | cpvDigits->Compress() ; | |
589 | ||
590 | // 3. add digits to temporary hit list fTmpHits | |
591 | ||
592 | ndigits = cpvDigits->GetEntriesFast(); | |
593 | for (idigit=0; idigit<ndigits; idigit++) { | |
594 | AliPHOSCPVDigit *cpvDigit = (AliPHOSCPVDigit*) cpvDigits->UncheckedAt(idigit); | |
595 | relid[0] = moduleNumber + 1 ; // CPV (or PHOS) module number | |
596 | relid[1] =-1 ; // means CPV | |
597 | relid[2] = cpvDigit->GetXpad() ; // column number of a pad | |
598 | relid[3] = cpvDigit->GetYpad() ; // row number of a pad | |
599 | ||
600 | // get the absolute Id number | |
601 | GetGeometry()->RelToAbsNumbering(relid, absid) ; | |
602 | ||
603 | // add current digit to the temporary hit list | |
604 | xyze[0] = 0. ; | |
605 | xyze[1] = 0. ; | |
606 | xyze[2] = 0. ; | |
607 | xyze[3] = cpvDigit->GetQpad() ; // amplitude in a pad | |
608 | primary = -1; // No need in primary for CPV | |
609 | AddHit(fIshunt, primary, tracknumber, absid, xyze, trackpid, pmom, xyd); | |
610 | ||
611 | if (cpvDigit->GetQpad() > 0.02) { | |
612 | xmean += cpvDigit->GetQpad() * (cpvDigit->GetXpad() + 0.5); | |
613 | zmean += cpvDigit->GetQpad() * (cpvDigit->GetYpad() + 0.5); | |
614 | qsum += cpvDigit->GetQpad(); | |
615 | } | |
616 | } | |
617 | delete cpvDigits; | |
618 | } | |
619 | } // end of IHEP configuration | |
620 | ||
621 | ||
622 | if(gMC->CurrentVolID(copy) == gMC->VolId("PXTL") ) { // We are inside a PBWO crystal | |
623 | gMC->TrackPosition(pos) ; | |
624 | xyze[0] = pos[0] ; | |
625 | xyze[1] = pos[1] ; | |
626 | xyze[2] = pos[2] ; | |
627 | xyze[3] = gMC->Edep() ; | |
628 | ||
629 | ||
630 | if ( (xyze[3] != 0) || entered ) { // Track is inside the crystal and deposits some energy or just entered | |
631 | ||
632 | gMC->CurrentVolOffID(10, relid[0]) ; // get the PHOS module number ; | |
633 | ||
634 | relid[1] = 0 ; // means PBW04 | |
635 | gMC->CurrentVolOffID(4, relid[2]) ; // get the row number inside the module | |
636 | gMC->CurrentVolOffID(3, relid[3]) ; // get the cell number inside the module | |
637 | ||
638 | // get the absolute Id number | |
639 | GetGeometry()->RelToAbsNumbering(relid, absid) ; | |
640 | ||
641 | // add current hit to the hit list | |
642 | AddHit(fIshunt, primary,tracknumber, absid, xyze, trackpid,pmom, xyd); | |
643 | ||
644 | ||
645 | } // there is deposited energy | |
646 | } // we are inside a PHOS Xtal | |
647 | ||
648 | ||
649 | } | |
650 | ||
651 | //____________________________________________________________________________ | |
652 | void AliPHOSv1::CPVDigitize (TLorentzVector p, Float_t *zxhit, Int_t moduleNumber, TClonesArray *cpvDigits) | |
653 | { | |
654 | // ------------------------------------------------------------------------ | |
655 | // Digitize one CPV hit: | |
656 | // On input take exact 4-momentum p and position zxhit of the hit, | |
657 | // find the pad response around this hit and | |
658 | // put the amplitudes in the pads into array digits | |
659 | // | |
660 | // Author: Yuri Kharlov (after Serguei Sadovsky) | |
661 | // 2 October 2000 | |
662 | // ------------------------------------------------------------------------ | |
663 | ||
664 | const Float_t kCelWr = GetGeometry()->GetPadSizePhi()/2; // Distance between wires (2 wires above 1 pad) | |
665 | const Float_t kDetR = 0.1; // Relative energy fluctuation in track for 100 e- | |
666 | const Float_t kdEdx = 4.0; // Average energy loss in CPV; | |
667 | const Int_t kNgamz = 5; // Ionization size in Z | |
668 | const Int_t kNgamx = 9; // Ionization size in Phi | |
669 | const Float_t kNoise = 0.03; // charge noise in one pad | |
670 | ||
671 | Float_t rnor1,rnor2; | |
672 | ||
673 | // Just a reminder on axes notation in the CPV module: | |
674 | // axis Z goes along the beam | |
675 | // axis X goes across the beam in the module plane | |
676 | // axis Y is a normal to the module plane showing from the IP | |
677 | ||
678 | Float_t hitX = zxhit[0]; | |
679 | Float_t hitZ =-zxhit[1]; | |
680 | Float_t pX = p.Px(); | |
681 | Float_t pZ =-p.Pz(); | |
682 | Float_t pNorm = p.Py(); | |
683 | Float_t eloss = kdEdx; | |
684 | ||
685 | Float_t dZY = pZ/pNorm * GetGeometry()->GetCPVGasThickness(); | |
686 | Float_t dXY = pX/pNorm * GetGeometry()->GetCPVGasThickness(); | |
687 | gRandom->Rannor(rnor1,rnor2); | |
688 | eloss *= (1 + kDetR*rnor1) * | |
689 | TMath::Sqrt((1 + ( pow(dZY,2) + pow(dXY,2) ) / pow(GetGeometry()->GetCPVGasThickness(),2))); | |
690 | Float_t zhit1 = hitZ + GetGeometry()->GetCPVActiveSize(1)/2 - dZY/2; | |
691 | Float_t xhit1 = hitX + GetGeometry()->GetCPVActiveSize(0)/2 - dXY/2; | |
692 | Float_t zhit2 = zhit1 + dZY; | |
693 | Float_t xhit2 = xhit1 + dXY; | |
694 | ||
695 | Int_t iwht1 = (Int_t) (xhit1 / kCelWr); // wire (x) coordinate "in" | |
696 | Int_t iwht2 = (Int_t) (xhit2 / kCelWr); // wire (x) coordinate "out" | |
697 | ||
698 | Int_t nIter; | |
699 | Float_t zxe[3][5]; | |
700 | if (iwht1==iwht2) { // incline 1-wire hit | |
701 | nIter = 2; | |
702 | zxe[0][0] = (zhit1 + zhit2 - dZY*0.57735) / 2; | |
703 | zxe[1][0] = (iwht1 + 0.5) * kCelWr; | |
704 | zxe[2][0] = eloss/2; | |
705 | zxe[0][1] = (zhit1 + zhit2 + dZY*0.57735) / 2; | |
706 | zxe[1][1] = (iwht1 + 0.5) * kCelWr; | |
707 | zxe[2][1] = eloss/2; | |
708 | } | |
709 | else if (TMath::Abs(iwht1-iwht2) != 1) { // incline 3-wire hit | |
710 | nIter = 3; | |
711 | Int_t iwht3 = (iwht1 + iwht2) / 2; | |
712 | Float_t xwht1 = (iwht1 + 0.5) * kCelWr; // wire 1 | |
713 | Float_t xwht2 = (iwht2 + 0.5) * kCelWr; // wire 2 | |
714 | Float_t xwht3 = (iwht3 + 0.5) * kCelWr; // wire 3 | |
715 | Float_t xwr13 = (xwht1 + xwht3) / 2; // center 13 | |
716 | Float_t xwr23 = (xwht2 + xwht3) / 2; // center 23 | |
717 | Float_t dxw1 = xhit1 - xwr13; | |
718 | Float_t dxw2 = xhit2 - xwr23; | |
719 | Float_t egm1 = TMath::Abs(dxw1) / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) + kCelWr ); | |
720 | Float_t egm2 = TMath::Abs(dxw2) / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) + kCelWr ); | |
721 | Float_t egm3 = kCelWr / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) + kCelWr ); | |
722 | zxe[0][0] = (dXY*(xwr13-xwht1)/dXY + zhit1 + zhit1) / 2; | |
723 | zxe[1][0] = xwht1; | |
724 | zxe[2][0] = eloss * egm1; | |
725 | zxe[0][1] = (dXY*(xwr23-xwht1)/dXY + zhit1 + zhit2) / 2; | |
726 | zxe[1][1] = xwht2; | |
727 | zxe[2][1] = eloss * egm2; | |
728 | zxe[0][2] = dXY*(xwht3-xwht1)/dXY + zhit1; | |
729 | zxe[1][2] = xwht3; | |
730 | zxe[2][2] = eloss * egm3; | |
731 | } | |
732 | else { // incline 2-wire hit | |
733 | nIter = 2; | |
734 | Float_t xwht1 = (iwht1 + 0.5) * kCelWr; | |
735 | Float_t xwht2 = (iwht2 + 0.5) * kCelWr; | |
736 | Float_t xwr12 = (xwht1 + xwht2) / 2; | |
737 | Float_t dxw1 = xhit1 - xwr12; | |
738 | Float_t dxw2 = xhit2 - xwr12; | |
739 | Float_t egm1 = TMath::Abs(dxw1) / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) ); | |
740 | Float_t egm2 = TMath::Abs(dxw2) / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) ); | |
741 | zxe[0][0] = (zhit1 + zhit2 - dZY*egm1) / 2; | |
742 | zxe[1][0] = xwht1; | |
743 | zxe[2][0] = eloss * egm1; | |
744 | zxe[0][1] = (zhit1 + zhit2 + dZY*egm2) / 2; | |
745 | zxe[1][1] = xwht2; | |
746 | zxe[2][1] = eloss * egm2; | |
747 | } | |
748 | ||
749 | // Finite size of ionization region | |
750 | ||
751 | Int_t nCellZ = GetGeometry()->GetNumberOfCPVPadsZ(); | |
752 | Int_t nCellX = GetGeometry()->GetNumberOfCPVPadsPhi(); | |
753 | Int_t nz3 = (kNgamz+1)/2; | |
754 | Int_t nx3 = (kNgamx+1)/2; | |
755 | cpvDigits->Expand(nIter*kNgamx*kNgamz); | |
756 | TClonesArray &ldigits = *(TClonesArray *)cpvDigits; | |
757 | ||
758 | for (Int_t iter=0; iter<nIter; iter++) { | |
759 | ||
760 | Float_t zhit = zxe[0][iter]; | |
761 | Float_t xhit = zxe[1][iter]; | |
762 | Float_t qhit = zxe[2][iter]; | |
763 | Float_t zcell = zhit / GetGeometry()->GetPadSizeZ(); | |
764 | Float_t xcell = xhit / GetGeometry()->GetPadSizePhi(); | |
765 | if ( zcell<=0 || xcell<=0 || | |
766 | zcell>=nCellZ || xcell>=nCellX) return; | |
767 | Int_t izcell = (Int_t) zcell; | |
768 | Int_t ixcell = (Int_t) xcell; | |
769 | Float_t zc = zcell - izcell - 0.5; | |
770 | Float_t xc = xcell - ixcell - 0.5; | |
771 | for (Int_t iz=1; iz<=kNgamz; iz++) { | |
772 | Int_t kzg = izcell + iz - nz3; | |
773 | if (kzg<=0 || kzg>nCellZ) continue; | |
774 | Float_t zg = (Float_t)(iz-nz3) - zc; | |
775 | for (Int_t ix=1; ix<=kNgamx; ix++) { | |
776 | Int_t kxg = ixcell + ix - nx3; | |
777 | if (kxg<=0 || kxg>nCellX) continue; | |
778 | Float_t xg = (Float_t)(ix-nx3) - xc; | |
779 | ||
780 | // Now calculate pad response | |
781 | Float_t qpad = CPVPadResponseFunction(qhit,zg,xg); | |
782 | qpad += kNoise*rnor2; | |
783 | if (qpad<0) continue; | |
784 | ||
785 | // Fill the array with pad response ID and amplitude | |
786 | new(ldigits[cpvDigits->GetEntriesFast()]) AliPHOSCPVDigit(kxg,kzg,qpad); | |
787 | } | |
788 | } | |
789 | } | |
790 | } | |
791 | ||
792 | //____________________________________________________________________________ | |
793 | Float_t AliPHOSv1::CPVPadResponseFunction(Float_t qhit, Float_t zhit, Float_t xhit) { | |
794 | // ------------------------------------------------------------------------ | |
795 | // Calculate the amplitude in one CPV pad using the | |
796 | // cumulative pad response function | |
797 | // Author: Yuri Kharlov (after Serguei Sadovski) | |
798 | // 3 October 2000 | |
799 | // ------------------------------------------------------------------------ | |
800 | ||
801 | Double_t dz = GetGeometry()->GetPadSizeZ() / 2; | |
802 | Double_t dx = GetGeometry()->GetPadSizePhi() / 2; | |
803 | Double_t z = zhit * GetGeometry()->GetPadSizeZ(); | |
804 | Double_t x = xhit * GetGeometry()->GetPadSizePhi(); | |
805 | Double_t amplitude = qhit * | |
806 | (CPVCumulPadResponse(z+dz,x+dx) - CPVCumulPadResponse(z+dz,x-dx) - | |
807 | CPVCumulPadResponse(z-dz,x+dx) + CPVCumulPadResponse(z-dz,x-dx)); | |
808 | return (Float_t)amplitude; | |
809 | } | |
810 | ||
811 | //____________________________________________________________________________ | |
812 | Double_t AliPHOSv1::CPVCumulPadResponse(Double_t x, Double_t y) { | |
813 | // ------------------------------------------------------------------------ | |
814 | // Cumulative pad response function | |
815 | // It includes several terms from the CF decomposition in electrostatics | |
816 | // Note: this cumulative function is wrong since omits some terms | |
817 | // but the cell amplitude obtained with it is correct because | |
818 | // these omitting terms cancel | |
819 | // Author: Yuri Kharlov (after Serguei Sadovski) | |
820 | // 3 October 2000 | |
821 | // ------------------------------------------------------------------------ | |
822 | ||
823 | const Double_t kA=1.0; | |
824 | const Double_t kB=0.7; | |
825 | ||
826 | Double_t r2 = x*x + y*y; | |
827 | Double_t xy = x*y; | |
828 | Double_t cumulPRF = 0; | |
829 | for (Int_t i=0; i<=4; i++) { | |
830 | Double_t b1 = (2*i + 1) * kB; | |
831 | cumulPRF += TMath::Power(-1,i) * TMath::ATan( xy / (b1*TMath::Sqrt(b1*b1 + r2)) ); | |
832 | } | |
833 | cumulPRF *= kA/(2*TMath::Pi()); | |
834 | return cumulPRF; | |
835 | } | |
836 |