.so cleanup: more gSystem->Load()
[u/mrichter/AliRoot.git] / PHOS / AliPHOSDebug.cxx
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b37750a6 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//---
b37750a6 21// Layout EMC + CPV has name IHEP:
22// Produces hits for CPV, cumulated hits
23//---
b37750a6 24//*-- Author: Yves Schutz (SUBATECH)
25
26
27// --- ROOT system ---
28
b37750a6 29#include "TRandom.h"
30#include "TTree.h"
31
32
33// --- Standard library ---
34
35#include <stdio.h>
36#include <string.h>
37#include <stdlib.h>
38#include <strstream.h>
39
40// --- AliRoot header files ---
41
42#include "AliPHOSv1.h"
43#include "AliPHOSHit.h"
44#include "AliPHOSDigit.h"
f444a19f 45#include "AliPHOSReconstructor.h"
b37750a6 46#include "AliRun.h"
47#include "AliConst.h"
b37750a6 48
49ClassImp(AliPHOSv1)
50
51//____________________________________________________________________________
52AliPHOSv1::AliPHOSv1():
53AliPHOSv0()
54{
55 // ctor
56
57 fReconstructioner = 0;
58 fTrackSegmentMaker = 0;
59
60}
61
62//____________________________________________________________________________
63AliPHOSv1::AliPHOSv1(const char *name, const char *title):
64AliPHOSv0(name,title)
65{
66 // ctor : title is used to identify the layout
b37750a6 67 // IHEP = 5 modules (EMC + CPV )
b37750a6 68 //
69 // We store hits :
70 // - fHits (the "normal" one), which retains the hits associated with
71 // the current primary particle being tracked
72 // (this array is reset after each primary has been tracked).
73 //
74
75 fPinElectronicNoise = 0.010 ;
76 fDigitThreshold = 0.01 ; // 1 GeV
77 fDigitizeA= 0. ;
78 fDigitizeB = 10000000. ;
79
80
81 // We do not want to save in TreeH the raw hits
82 // But save the cumulated hits instead (need to create the branch myself)
83 // It is put in the Digit Tree because the TreeH is filled after each primary
84 // and the TreeD at the end of the event (branch is set in FinishEvent() ).
85
86 fHits= new TClonesArray("AliPHOSHit",1000) ;
87
88 fNhits = 0 ;
89
90 fReconstructioner = 0;
91 fTrackSegmentMaker = 0;
92
93 fIshunt = 1 ; // All hits are associated with primary particles
94
95}
96
97//____________________________________________________________________________
f444a19f 98AliPHOSv1::AliPHOSv1(AliPHOSReconstructor * Reconstructioner, const char *name, const char *title):
b37750a6 99 AliPHOSv0(name,title)
100{
101 // ctor : title is used to identify the layout
b37750a6 102
103 fPinElectronicNoise = 0.010 ;
104
105 // We do not want to save in TreeH the raw hits
106
107 fDigits = 0 ;
108 fHits= new TClonesArray("AliPHOSHit",1000) ;
109
110 fNhits = 0 ;
111
112 fIshunt = 1 ; // All hits are associated with primary particles
113
114 // gets an instance of the geometry parameters class
fa7cce36 115 AliPHOSGeometry::GetInstance(title, "") ;
b37750a6 116
fa7cce36 117 if (GetGeometry()->IsInitialized() )
21cd0c07 118 Info("AliPHOSv1", "AliPHOS %d : PHOS geometry intialized for %s", Version(), GetGeometry()->GetName() );
b37750a6 119 else
21cd0c07 120 Info("AliPHOSv1", "AliPHOS %d : PHOS geometry initialization failed !", Version() ) ;
b37750a6 121
122 // Defining the PHOS Reconstructioner
123
124 fReconstructioner = Reconstructioner ;
125
126}
127
128//____________________________________________________________________________
129AliPHOSv1::~AliPHOSv1()
130{
131 // dtor
132
133 if ( fHits) {
134 fHits->Delete() ;
135 delete fHits ;
136 fHits = 0 ;
137 }
138
139 if ( fSDigits) {
140 fSDigits->Delete() ;
141 delete fSDigits ;
142 fSDigits = 0 ;
143 }
144
145 if ( fDigits) {
146 fDigits->Delete() ;
147 delete fDigits ;
148 fDigits = 0 ;
149 }
150
151 if ( fEmcRecPoints ) {
152 fEmcRecPoints->Delete() ;
153 delete fEmcRecPoints ;
154 fEmcRecPoints = 0 ;
155 }
156
157 if ( fPpsdRecPoints ) {
158 fPpsdRecPoints->Delete() ;
159 delete fPpsdRecPoints ;
160 fPpsdRecPoints = 0 ;
161 }
162
163 if ( fTrackSegments ) {
164 fTrackSegments->Delete() ;
165 delete fTrackSegments ;
166 fTrackSegments = 0 ;
167 }
168
169}
170
171//____________________________________________________________________________
172void 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)
173{
174 // Add a hit to the hit list.
175 // A PHOS hit is the sum of all hits in a single crystal
176 // or in a single PPSD gas cell
177
178 Int_t hitCounter ;
179 AliPHOSHit *newHit ;
180 AliPHOSHit *curHit ;
181 Bool_t deja = kFALSE ;
182
183 newHit = new AliPHOSHit(shunt, primary, tracknumber, Id, hits, trackpid, p, lpos) ;
184
185 for ( hitCounter = fNhits-1 ; hitCounter >= 0 && !deja ; hitCounter-- ) {
186 curHit = (AliPHOSHit*) (*fHits)[hitCounter] ;
187 if( *curHit == *newHit ) {
188 *curHit = *curHit + *newHit ;
189 deja = kTRUE ;
190 }
191 }
192
193 if ( !deja ) {
194 new((*fHits)[fNhits]) AliPHOSHit(*newHit) ;
195 fNhits++ ;
196 }
197
198 delete newHit;
199}
200
201//____________________________________________________________________________
a4e98857 202void AliPHOSv1::Hits2SDigits()
203{
204 // Collects all hits in the same active volume into digit
205 // OBSOLETE replace by SDigitizer
b37750a6 206
207 Int_t i ;
208 Int_t j ;
209 AliPHOSHit * hit ;
210 AliPHOSDigit * newdigit ;
211 AliPHOSDigit * curdigit ;
212 Bool_t deja = kFALSE ;
213
214
215 Int_t itrack ;
216 for (itrack=0; itrack<gAlice->GetNtrack(); itrack++){
217
218 //=========== Get the Hits Tree for the Primary track itrack
88cb7938 219 gAlice->ResetHits();
220 if (TreeH() == 0x0)
221 {
222 Error("Hits2SDigits","Can not find TreeH in the folder");
223 return;
224 }
225 TreeH()->GetEvent(itrack);
b37750a6 226
227
228 for ( i = 0 ; i < fHits->GetEntries() ; i++ ) {
229 hit = (AliPHOSHit*)fHits->At(i) ;
230
231 // Assign primary number only if contribution is significant
232 if( hit->GetEnergy() > fDigitThreshold)
233 newdigit = new AliPHOSDigit( hit->GetPrimary(), hit->GetId(), Digitize( hit->GetEnergy() ) ) ;
234 else
235 newdigit = new AliPHOSDigit( -1 , hit->GetId(), Digitize( hit->GetEnergy() ) ) ;
236 deja =kFALSE ;
237
238 for ( j = 0 ; j < fnSdigits ; j++) {
239 curdigit = (AliPHOSDigit*) fSDigits->At(j) ;
240 if ( *curdigit == *newdigit) {
241 *curdigit = *curdigit + *newdigit ;
242 deja = kTRUE ;
243 }
244 }
245
246 if ( !deja ) {
247 new((*fSDigits)[fnSdigits]) AliPHOSDigit(* newdigit) ;
248 fnSdigits++ ;
249 }
250
251 delete newdigit ;
252 }
253
254 } // loop over tracks
255
256 fSDigits->Sort() ;
257
258 fnSdigits = fSDigits->GetEntries() ;
259 fSDigits->Expand(fnSdigits) ;
260
261 for (i = 0 ; i < fnSdigits ; i++) {
262 AliPHOSDigit * digit = (AliPHOSDigit *) fSDigits->At(i) ;
263 digit->SetIndexInList(i) ;
264 }
265
266 gAlice->TreeS()->Fill() ;
267 gAlice->TreeS()->Write(0,TObject::kOverwrite) ;
268
269
270}
271//____________________________________________________________________________
a4e98857 272void AliPHOSv1::SDigits2Digits()
273{
274 // Adds noise to the summable digits and removes everething below thresholds
275 // Note, that sDigits should be SORTED in accordance with abs ID.
276 // OBSOLETE Replaced by Digitzer
b37750a6 277
278 gAlice->TreeS()->GetEvent(0) ;
279
280 // First calculate noise induced by the PIN diode of the PbWO crystals
281 Int_t iCurSDigit = 0 ;
282
283 //we assume, that there is al least one EMC digit...
284 if(fSDigits->GetEntries() == 0) {
21cd0c07 285 Warning("SDigits2Digits", "No SDigits !!! Do not produce Digits ") ;
b37750a6 286 return ;
287 }
288
289 Int_t idCurSDigit = ((AliPHOSDigit *)fSDigits->At(0))->GetId() ;
290
291 Int_t absID ;
fa7cce36 292 for(absID = 1; absID < GetGeometry()->GetNModules()*GetGeometry()->GetNPhi()*GetGeometry()->GetNZ(); absID++){
b37750a6 293 Float_t noise = gRandom->Gaus(0., fPinElectronicNoise) ;
294 if(absID < idCurSDigit ){
295 if(noise >fDigitThreshold ){
296 new((*fDigits)[fNdigits]) AliPHOSDigit( -1,absID,Digitize(noise) ) ;
297 fNdigits++ ;
298 }
299 }
300 else{ //add noise and may be remove the true hit
301 Float_t signal = noise + Calibrate(((AliPHOSDigit *)fSDigits->At(iCurSDigit))->GetAmp()) ;
302 if( signal >fDigitThreshold ){
303 AliPHOSDigit * digit = (AliPHOSDigit*) fSDigits->At(iCurSDigit) ;
304 new((*fDigits)[fNdigits]) AliPHOSDigit( *digit ) ;
305 ((AliPHOSDigit *)fDigits->At(fNdigits))->SetAmp(Digitize(signal));
306 fNdigits++ ;
307 }
308
309 if(iCurSDigit < fSDigits->GetEntries()-1){
310 iCurSDigit++ ;
311 idCurSDigit = ((AliPHOSDigit*)fSDigits->At(iCurSDigit))->GetId() ;
312 }
313 else
314 idCurSDigit = 10000000; //no real hits left
315 }
316
317 }
318
319 //remove PPSD/CPV digits below thresholds
320 Int_t idigit ;
321 for(idigit = iCurSDigit; idigit < fSDigits->GetEntries() ; idigit++){ //loop over CPV/PPSD digits
322
323 AliPHOSDigit * digit = (AliPHOSDigit *) fSDigits->At(idigit) ;
324 Float_t ene = Calibrate(digit->GetAmp()) ;
325
326 Int_t relid[4] ;
fa7cce36 327 GetGeometry()->AbsToRelNumbering(digit->GetId(), relid) ;
328 if ( relid[0] > GetGeometry()->GetNCPVModules() ){ //ppsd
b37750a6 329 if ( ( (relid[1] > 0) && (ene > fPpsdEnergyThreshold)) || //PPSD digit
330 ( (relid[1] < 0) && (ene > fCpvEnergyThreshold ) ) ) //CPV digit
331 new((*fDigits)[fNdigits]) AliPHOSDigit( *digit ) ;
332 fNdigits++ ;
333 }
334 }
335
336 fDigits->Compress() ;
337
338 fNdigits = fDigits->GetEntries() ;
339 fDigits->Expand(fNdigits) ;
340
341 Int_t i ;
342 for (i = 0 ; i < fNdigits ; i++) {
343 AliPHOSDigit * digit = (AliPHOSDigit *) fDigits->At(i) ;
344 digit->SetIndexInList(i) ;
345 }
346
347 gAlice->TreeD()->Fill() ;
348
349 gAlice->TreeD()->Write(0,TObject::kOverwrite) ;
350
351}
352
353//___________________________________________________________________________
354void AliPHOSv1::MakeBranch(Option_t* opt, char *file)
355{
a4e98857 356 // Called by AliRun
b37750a6 357
358 char *cH ;
359 // Create new branche in the current Root Tree in the digit Tree
360 AliDetector::MakeBranch(opt) ;
361
362
363 cH = strstr(opt,"S");
364 //Create a branch for SDigits
365 if( cH ){
366 char branchname[20];
367 sprintf(branchname,"%s",GetName());
368 if(fSDigits)
369 fSDigits->Clear();
370
371 fnSdigits = 0 ;
372 gAlice->MakeBranchInTree(gAlice->TreeS(),branchname,&fSDigits,fBufferSize,file);
373 }
374
375 cH = strstr(opt,"D");
376 //Create a branch for Digits
377 if( cH ){
378 char branchname[20];
379 sprintf(branchname,"%s",GetName());
380
381 if(fDigits)
382 fDigits->Clear();
383
384 gAlice->MakeBranchInTree(gAlice->TreeD(),branchname,&fDigits,fBufferSize,file);
385 }
386
387 cH = strstr(opt,"R");
388 //Create a branch for Reconstruction
389 if( cH ){
390 char branchname[20];
391
392 Int_t splitlevel = 0 ;
393
394 if(fEmcRecPoints)
395 fEmcRecPoints->Delete() ;
396
397 if ( fEmcRecPoints && gAlice->TreeR() ) {
398 sprintf(branchname,"%sEmcRP",GetName()) ;
399 gAlice->MakeBranchInTree(gAlice->TreeR(),branchname,"TObjArray",&fEmcRecPoints, fBufferSize, splitlevel,file);
400 }
401
402 if(fPpsdRecPoints)
403 fPpsdRecPoints->Delete() ;
404
405 if ( fPpsdRecPoints && gAlice->TreeR() ) {
406 sprintf(branchname,"%sPpsdRP",GetName()) ;
407 gAlice->MakeBranchInTree(gAlice->TreeR(),branchname,"TObjArray",&fPpsdRecPoints, fBufferSize, splitlevel,file);
408 }
409
410 if(fTrackSegments)
411 fTrackSegments->Clear() ;
412
413 if ( fTrackSegments && gAlice->TreeR() ) {
414 sprintf(branchname,"%sTS",GetName()) ;
415 gAlice->MakeBranchInTree(gAlice->TreeR(),branchname,&fTrackSegments,fBufferSize,file);
416 }
417
418 if(fRecParticles)
419 fRecParticles->Clear() ;
420
421 if ( fRecParticles && gAlice->TreeR() ) {
422 sprintf(branchname,"%sRP",GetName()) ;
423 gAlice->MakeBranchInTree(gAlice->TreeR(),branchname,&fRecParticles,fBufferSize,file);
424 }
425
426 }
427
428}
429
430//_____________________________________________________________________________
f444a19f 431void AliPHOSv1::Reconstruction(AliPHOSReconstructor * Reconstructioner)
b37750a6 432{
433 // 1. Reinitializes the existing RecPoint, TrackSegment, and RecParticles Lists and
434 // 2. Creates TreeR with a branch for each list
435 // 3. Steers the reconstruction processes
436 // 4. Saves the 3 lists in TreeR
437 // 5. Write the Tree to File
438
439 fReconstructioner = Reconstructioner ;
440
441 // 1.
442
443 // gAlice->MakeTree("R") ;
444
445 MakeBranch("R") ;
446
447 // 3.
448
449 fReconstructioner->Make(fDigits, fEmcRecPoints, fPpsdRecPoints, fTrackSegments, fRecParticles);
450
451 printf("Reconstruction: %d %d %d %d\n",
452 fEmcRecPoints->GetEntries(),fPpsdRecPoints->GetEntries(),
453 fTrackSegments->GetEntries(),fRecParticles->GetEntries());
454
455 // 4. Expand or Shrink the arrays to the proper size
456
457 Int_t size ;
458
459 size = fEmcRecPoints->GetEntries() ;
460 fEmcRecPoints->Expand(size) ;
461
462 size = fPpsdRecPoints->GetEntries() ;
463 fPpsdRecPoints->Expand(size) ;
464
465 size = fTrackSegments->GetEntries() ;
466 fTrackSegments->Expand(size) ;
467
468 size = fRecParticles->GetEntries() ;
469 fRecParticles->Expand(size) ;
470
471 gAlice->TreeR()->Fill() ;
472 // 5.
473
474 gAlice->TreeR()->Write(0,TObject::kOverwrite) ;
475
476 // Deleting reconstructed objects
477 ResetReconstruction();
478
479}
480
481//____________________________________________________________________________
482void AliPHOSv1::ResetReconstruction()
483{
484 // Deleting reconstructed objects
485
486 if ( fEmcRecPoints ) fEmcRecPoints ->Delete();
487 if ( fPpsdRecPoints ) fPpsdRecPoints->Delete();
488 if ( fTrackSegments ) fTrackSegments->Delete();
489 if ( fRecParticles ) fRecParticles ->Delete();
490
491}
492
493//____________________________________________________________________________
494
495void AliPHOSv1::StepManager(void)
496{
497 // Accumulates hits as long as the track stays in a single crystal or PPSD gas Cell
498
499 Int_t relid[4] ; // (box, layer, row, column) indices
500 Int_t absid ; // absolute cell ID number
501 Float_t xyze[4]={0,0,0,0} ; // position wrt MRS and energy deposited
502 TLorentzVector pos ; // Lorentz vector of the track current position
503 TLorentzVector pmom ; //momentum of the particle initiated hit
504 Float_t xyd[3]={0,0,0} ; //local posiiton of the entering
505 Bool_t entered = kFALSE ;
506 Int_t copy ;
507
642f15cf 508 Int_t tracknumber = gAlice->GetCurrentTrackNumber() ;
509 Int_t primary = gAlice->GetPrimary( gAlice->GetCurrentTrackNumber() );
fa7cce36 510 TString name = GetGeometry()->GetName() ;
b37750a6 511 Int_t trackpid = 0 ;
512
2942f542 513 if( TVirtualMC::GetMC()->IsTrackEntering() ){ // create hit with position and momentum of new particle,
b37750a6 514 // but may be without energy deposition
515
516 // Current position of the hit in the local ref. system
2942f542 517 TVirtualMC::GetMC() -> TrackPosition(pos);
b37750a6 518 Float_t xyzm[3], xyzd[3] ;
519 Int_t i;
520 for (i=0; i<3; i++) xyzm[i] = pos[i];
2942f542 521 TVirtualMC::GetMC() -> Gmtod (xyzm, xyzd, 1); // transform coordinate from master to daughter system
b37750a6 522 xyd[0] = xyzd[0];
523 xyd[1] =-xyzd[1];
524 xyd[2] =-xyzd[2];
525
526
527 // Current momentum of the hit's track in the local ref. system
2942f542 528 TVirtualMC::GetMC() -> TrackMomentum(pmom);
b37750a6 529 Float_t pm[3], pd[3];
530 for (i=0; i<3; i++) pm[i] = pmom[i];
2942f542 531 TVirtualMC::GetMC() -> Gmtod (pm, pd, 2); // transform 3-momentum from master to daughter system
b37750a6 532 pmom[0] = pd[0];
533 pmom[1] =-pd[1];
534 pmom[2] =-pd[2];
535
2942f542 536 trackpid = TVirtualMC::GetMC()->TrackPid();
b37750a6 537 entered = kTRUE ; // Mark to create hit even withou energy deposition
538
539 }
540
541
d6eed22f 542 if ( name == "IHEP" ) { // ======> CPV is a IHEP's one
b37750a6 543
544 // Yuri Kharlov, 28 September 2000
545
2942f542 546 static Int_t idPCPQ = TVirtualMC::GetMC()->VolId("PCPQ");
547 if( TVirtualMC::GetMC()->CurrentVolID(copy) == idPCPQ &&
b37750a6 548 entered &&
2942f542 549 TVirtualMC::GetMC()->TrackCharge() != 0) {
b37750a6 550
551 // Digitize the current CPV hit:
552
553 // 1. find pad response and
554
555 Int_t moduleNumber;
2942f542 556 TVirtualMC::GetMC()->CurrentVolOffID(3,moduleNumber);
b37750a6 557 moduleNumber--;
558
559
560 TClonesArray *cpvDigits = new TClonesArray("AliPHOSCPVDigit",0); // array of digits for current hit
561 CPVDigitize(pmom,xyd,moduleNumber,cpvDigits);
562
563 Float_t xmean = 0;
564 Float_t zmean = 0;
565 Float_t qsum = 0;
566 Int_t idigit,ndigits;
567
568 // 2. go through the current digit list and sum digits in pads
569
570 ndigits = cpvDigits->GetEntriesFast();
571 for (idigit=0; idigit<ndigits-1; idigit++) {
572 AliPHOSCPVDigit *cpvDigit1 = (AliPHOSCPVDigit*) cpvDigits->UncheckedAt(idigit);
573 Float_t x1 = cpvDigit1->GetXpad() ;
574 Float_t z1 = cpvDigit1->GetYpad() ;
575 for (Int_t jdigit=idigit+1; jdigit<ndigits; jdigit++) {
576 AliPHOSCPVDigit *cpvDigit2 = (AliPHOSCPVDigit*) cpvDigits->UncheckedAt(jdigit);
577 Float_t x2 = cpvDigit2->GetXpad() ;
578 Float_t z2 = cpvDigit2->GetYpad() ;
579 if (x1==x2 && z1==z2) {
580 Float_t qsum = cpvDigit1->GetQpad() + cpvDigit2->GetQpad() ;
581 cpvDigit2->SetQpad(qsum) ;
582 cpvDigits->RemoveAt(idigit) ;
583 }
584 }
585 }
586 cpvDigits->Compress() ;
587
588 // 3. add digits to temporary hit list fTmpHits
589
590 ndigits = cpvDigits->GetEntriesFast();
591 for (idigit=0; idigit<ndigits; idigit++) {
592 AliPHOSCPVDigit *cpvDigit = (AliPHOSCPVDigit*) cpvDigits->UncheckedAt(idigit);
593 relid[0] = moduleNumber + 1 ; // CPV (or PHOS) module number
594 relid[1] =-1 ; // means CPV
595 relid[2] = cpvDigit->GetXpad() ; // column number of a pad
596 relid[3] = cpvDigit->GetYpad() ; // row number of a pad
597
598 // get the absolute Id number
fa7cce36 599 GetGeometry()->RelToAbsNumbering(relid, absid) ;
b37750a6 600
601 // add current digit to the temporary hit list
602 xyze[0] = 0. ;
603 xyze[1] = 0. ;
604 xyze[2] = 0. ;
605 xyze[3] = cpvDigit->GetQpad() ; // amplitude in a pad
606 primary = -1; // No need in primary for CPV
607 AddHit(fIshunt, primary, tracknumber, absid, xyze, trackpid, pmom, xyd);
608
609 if (cpvDigit->GetQpad() > 0.02) {
610 xmean += cpvDigit->GetQpad() * (cpvDigit->GetXpad() + 0.5);
611 zmean += cpvDigit->GetQpad() * (cpvDigit->GetYpad() + 0.5);
612 qsum += cpvDigit->GetQpad();
613 }
614 }
615 delete cpvDigits;
616 }
617 } // end of IHEP configuration
618
619
2942f542 620 if(TVirtualMC::GetMC()->CurrentVolID(copy) == TVirtualMC::GetMC()->VolId("PXTL") ) { // We are inside a PBWO crystal
621 TVirtualMC::GetMC()->TrackPosition(pos) ;
b37750a6 622 xyze[0] = pos[0] ;
623 xyze[1] = pos[1] ;
624 xyze[2] = pos[2] ;
2942f542 625 xyze[3] = TVirtualMC::GetMC()->Edep() ;
b37750a6 626
627
628 if ( (xyze[3] != 0) || entered ) { // Track is inside the crystal and deposits some energy or just entered
629
2942f542 630 TVirtualMC::GetMC()->CurrentVolOffID(10, relid[0]) ; // get the PHOS module number ;
b37750a6 631
b37750a6 632 relid[1] = 0 ; // means PBW04
2942f542 633 TVirtualMC::GetMC()->CurrentVolOffID(4, relid[2]) ; // get the row number inside the module
634 TVirtualMC::GetMC()->CurrentVolOffID(3, relid[3]) ; // get the cell number inside the module
b37750a6 635
636 // get the absolute Id number
fa7cce36 637 GetGeometry()->RelToAbsNumbering(relid, absid) ;
b37750a6 638
639 // add current hit to the hit list
640 AddHit(fIshunt, primary,tracknumber, absid, xyze, trackpid,pmom, xyd);
641
642
643 } // there is deposited energy
644 } // we are inside a PHOS Xtal
645
646
647}
648
649//____________________________________________________________________________
650void AliPHOSv1::CPVDigitize (TLorentzVector p, Float_t *zxhit, Int_t moduleNumber, TClonesArray *cpvDigits)
651{
652 // ------------------------------------------------------------------------
653 // Digitize one CPV hit:
654 // On input take exact 4-momentum p and position zxhit of the hit,
655 // find the pad response around this hit and
656 // put the amplitudes in the pads into array digits
657 //
658 // Author: Yuri Kharlov (after Serguei Sadovsky)
659 // 2 October 2000
660 // ------------------------------------------------------------------------
661
fa7cce36 662 const Float_t kCelWr = GetGeometry()->GetPadSizePhi()/2; // Distance between wires (2 wires above 1 pad)
b37750a6 663 const Float_t kDetR = 0.1; // Relative energy fluctuation in track for 100 e-
664 const Float_t kdEdx = 4.0; // Average energy loss in CPV;
665 const Int_t kNgamz = 5; // Ionization size in Z
666 const Int_t kNgamx = 9; // Ionization size in Phi
667 const Float_t kNoise = 0.03; // charge noise in one pad
668
669 Float_t rnor1,rnor2;
670
671 // Just a reminder on axes notation in the CPV module:
672 // axis Z goes along the beam
673 // axis X goes across the beam in the module plane
674 // axis Y is a normal to the module plane showing from the IP
675
676 Float_t hitX = zxhit[0];
677 Float_t hitZ =-zxhit[1];
678 Float_t pX = p.Px();
679 Float_t pZ =-p.Pz();
680 Float_t pNorm = p.Py();
681 Float_t eloss = kdEdx;
682
fa7cce36 683 Float_t dZY = pZ/pNorm * GetGeometry()->GetCPVGasThickness();
684 Float_t dXY = pX/pNorm * GetGeometry()->GetCPVGasThickness();
b37750a6 685 gRandom->Rannor(rnor1,rnor2);
686 eloss *= (1 + kDetR*rnor1) *
fa7cce36 687 TMath::Sqrt((1 + ( pow(dZY,2) + pow(dXY,2) ) / pow(GetGeometry()->GetCPVGasThickness(),2)));
688 Float_t zhit1 = hitZ + GetGeometry()->GetCPVActiveSize(1)/2 - dZY/2;
689 Float_t xhit1 = hitX + GetGeometry()->GetCPVActiveSize(0)/2 - dXY/2;
b37750a6 690 Float_t zhit2 = zhit1 + dZY;
691 Float_t xhit2 = xhit1 + dXY;
692
693 Int_t iwht1 = (Int_t) (xhit1 / kCelWr); // wire (x) coordinate "in"
694 Int_t iwht2 = (Int_t) (xhit2 / kCelWr); // wire (x) coordinate "out"
695
696 Int_t nIter;
697 Float_t zxe[3][5];
698 if (iwht1==iwht2) { // incline 1-wire hit
699 nIter = 2;
700 zxe[0][0] = (zhit1 + zhit2 - dZY*0.57735) / 2;
701 zxe[1][0] = (iwht1 + 0.5) * kCelWr;
702 zxe[2][0] = eloss/2;
703 zxe[0][1] = (zhit1 + zhit2 + dZY*0.57735) / 2;
704 zxe[1][1] = (iwht1 + 0.5) * kCelWr;
705 zxe[2][1] = eloss/2;
706 }
707 else if (TMath::Abs(iwht1-iwht2) != 1) { // incline 3-wire hit
708 nIter = 3;
709 Int_t iwht3 = (iwht1 + iwht2) / 2;
710 Float_t xwht1 = (iwht1 + 0.5) * kCelWr; // wire 1
711 Float_t xwht2 = (iwht2 + 0.5) * kCelWr; // wire 2
712 Float_t xwht3 = (iwht3 + 0.5) * kCelWr; // wire 3
713 Float_t xwr13 = (xwht1 + xwht3) / 2; // center 13
714 Float_t xwr23 = (xwht2 + xwht3) / 2; // center 23
715 Float_t dxw1 = xhit1 - xwr13;
716 Float_t dxw2 = xhit2 - xwr23;
717 Float_t egm1 = TMath::Abs(dxw1) / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) + kCelWr );
718 Float_t egm2 = TMath::Abs(dxw2) / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) + kCelWr );
719 Float_t egm3 = kCelWr / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) + kCelWr );
720 zxe[0][0] = (dXY*(xwr13-xwht1)/dXY + zhit1 + zhit1) / 2;
721 zxe[1][0] = xwht1;
722 zxe[2][0] = eloss * egm1;
723 zxe[0][1] = (dXY*(xwr23-xwht1)/dXY + zhit1 + zhit2) / 2;
724 zxe[1][1] = xwht2;
725 zxe[2][1] = eloss * egm2;
726 zxe[0][2] = dXY*(xwht3-xwht1)/dXY + zhit1;
727 zxe[1][2] = xwht3;
728 zxe[2][2] = eloss * egm3;
729 }
730 else { // incline 2-wire hit
731 nIter = 2;
732 Float_t xwht1 = (iwht1 + 0.5) * kCelWr;
733 Float_t xwht2 = (iwht2 + 0.5) * kCelWr;
734 Float_t xwr12 = (xwht1 + xwht2) / 2;
735 Float_t dxw1 = xhit1 - xwr12;
736 Float_t dxw2 = xhit2 - xwr12;
737 Float_t egm1 = TMath::Abs(dxw1) / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) );
738 Float_t egm2 = TMath::Abs(dxw2) / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) );
739 zxe[0][0] = (zhit1 + zhit2 - dZY*egm1) / 2;
740 zxe[1][0] = xwht1;
741 zxe[2][0] = eloss * egm1;
742 zxe[0][1] = (zhit1 + zhit2 + dZY*egm2) / 2;
743 zxe[1][1] = xwht2;
744 zxe[2][1] = eloss * egm2;
745 }
746
747 // Finite size of ionization region
748
fa7cce36 749 Int_t nCellZ = GetGeometry()->GetNumberOfCPVPadsZ();
750 Int_t nCellX = GetGeometry()->GetNumberOfCPVPadsPhi();
b37750a6 751 Int_t nz3 = (kNgamz+1)/2;
752 Int_t nx3 = (kNgamx+1)/2;
753 cpvDigits->Expand(nIter*kNgamx*kNgamz);
754 TClonesArray &ldigits = *(TClonesArray *)cpvDigits;
755
756 for (Int_t iter=0; iter<nIter; iter++) {
757
758 Float_t zhit = zxe[0][iter];
759 Float_t xhit = zxe[1][iter];
760 Float_t qhit = zxe[2][iter];
fa7cce36 761 Float_t zcell = zhit / GetGeometry()->GetPadSizeZ();
762 Float_t xcell = xhit / GetGeometry()->GetPadSizePhi();
b37750a6 763 if ( zcell<=0 || xcell<=0 ||
764 zcell>=nCellZ || xcell>=nCellX) return;
765 Int_t izcell = (Int_t) zcell;
766 Int_t ixcell = (Int_t) xcell;
767 Float_t zc = zcell - izcell - 0.5;
768 Float_t xc = xcell - ixcell - 0.5;
769 for (Int_t iz=1; iz<=kNgamz; iz++) {
770 Int_t kzg = izcell + iz - nz3;
771 if (kzg<=0 || kzg>nCellZ) continue;
772 Float_t zg = (Float_t)(iz-nz3) - zc;
773 for (Int_t ix=1; ix<=kNgamx; ix++) {
774 Int_t kxg = ixcell + ix - nx3;
775 if (kxg<=0 || kxg>nCellX) continue;
776 Float_t xg = (Float_t)(ix-nx3) - xc;
777
778 // Now calculate pad response
779 Float_t qpad = CPVPadResponseFunction(qhit,zg,xg);
780 qpad += kNoise*rnor2;
781 if (qpad<0) continue;
782
783 // Fill the array with pad response ID and amplitude
784 new(ldigits[cpvDigits->GetEntriesFast()]) AliPHOSCPVDigit(kxg,kzg,qpad);
785 }
786 }
787 }
788}
789
790//____________________________________________________________________________
791Float_t AliPHOSv1::CPVPadResponseFunction(Float_t qhit, Float_t zhit, Float_t xhit) {
792 // ------------------------------------------------------------------------
793 // Calculate the amplitude in one CPV pad using the
794 // cumulative pad response function
795 // Author: Yuri Kharlov (after Serguei Sadovski)
796 // 3 October 2000
797 // ------------------------------------------------------------------------
798
fa7cce36 799 Double_t dz = GetGeometry()->GetPadSizeZ() / 2;
800 Double_t dx = GetGeometry()->GetPadSizePhi() / 2;
801 Double_t z = zhit * GetGeometry()->GetPadSizeZ();
802 Double_t x = xhit * GetGeometry()->GetPadSizePhi();
b37750a6 803 Double_t amplitude = qhit *
804 (CPVCumulPadResponse(z+dz,x+dx) - CPVCumulPadResponse(z+dz,x-dx) -
805 CPVCumulPadResponse(z-dz,x+dx) + CPVCumulPadResponse(z-dz,x-dx));
806 return (Float_t)amplitude;
807}
808
809//____________________________________________________________________________
810Double_t AliPHOSv1::CPVCumulPadResponse(Double_t x, Double_t y) {
811 // ------------------------------------------------------------------------
812 // Cumulative pad response function
813 // It includes several terms from the CF decomposition in electrostatics
814 // Note: this cumulative function is wrong since omits some terms
815 // but the cell amplitude obtained with it is correct because
816 // these omitting terms cancel
817 // Author: Yuri Kharlov (after Serguei Sadovski)
818 // 3 October 2000
819 // ------------------------------------------------------------------------
820
821 const Double_t kA=1.0;
822 const Double_t kB=0.7;
823
824 Double_t r2 = x*x + y*y;
825 Double_t xy = x*y;
826 Double_t cumulPRF = 0;
827 for (Int_t i=0; i<=4; i++) {
828 Double_t b1 = (2*i + 1) * kB;
829 cumulPRF += TMath::Power(-1,i) * TMath::ATan( xy / (b1*TMath::Sqrt(b1*b1 + r2)) );
830 }
831 cumulPRF *= kA/(2*TMath::Pi());
832 return cumulPRF;
833}
834