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18 //_________________________________________________________________________
19 // Implementation version v1 of PHOS Manager class
20 // Layout EMC + PPSD has name GPS2
21 // Produces cumulated hits (no hits) and digits
22 //*-- Author: Yves Schutz (SUBATECH)
25 // --- ROOT system ---
32 // --- Standard library ---
37 #include <strstream.h>
39 // --- AliRoot header files ---
41 #include "AliPHOSv1.h"
42 #include "AliPHOSHit.h"
43 #include "AliPHOSDigit.h"
44 #include "AliPHOSReconstructioner.h"
50 //____________________________________________________________________________
51 AliPHOSv1::AliPHOSv1()
58 //____________________________________________________________________________
59 AliPHOSv1::AliPHOSv1(const char *name, const char *title):
62 // ctor : title is used to identify the layout
63 // GPS2 = 5 modules (EMC + PPSD)
64 // We use 2 arrays of hits :
66 // - fHits (the "normal" one), which retains the hits associated with
67 // the current primary particle being tracked
68 // (this array is reset after each primary has been tracked).
70 // - fTmpHits, which retains all the hits of the current event. It
71 // is used for the digitization part.
73 fPinElectronicNoise = 0.010 ;
74 fDigitThreshold = 0.1 ; // 1 GeV
76 // We do not want to save in TreeH the raw hits
77 // But save the cumulated hits instead (need to create the branch myself)
78 // It is put in the Digit Tree because the TreeH is filled after each primary
79 // and the TreeD at the end of the event (branch is set in FinishEvent() ).
81 fTmpHits= new TClonesArray("AliPHOSHit",1000) ;
83 fNTmpHits = fNhits = 0 ;
85 fDigits = new TClonesArray("AliPHOSDigit",1000) ;
88 fIshunt = 1 ; // All hits are associated with primary particles
92 //____________________________________________________________________________
93 AliPHOSv1::AliPHOSv1(AliPHOSReconstructioner * Reconstructioner, const char *name, const char *title):
96 // ctor : title is used to identify the layout
97 // GPS2 = 5 modules (EMC + PPSD)
98 // We use 2 arrays of hits :
100 // - fHits (the "normal" one), which retains the hits associated with
101 // the current primary particle being tracked
102 // (this array is reset after each primary has been tracked).
104 // - fTmpHits, which retains all the hits of the current event. It
105 // is used for the digitization part.
107 fPinElectronicNoise = 0.010 ;
109 // We do not want to save in TreeH the raw hits
110 //fHits = new TClonesArray("AliPHOSHit",100) ;
112 fDigits = new TClonesArray("AliPHOSDigit",1000) ;
113 fTmpHits= new TClonesArray("AliPHOSHit",1000) ;
115 fNTmpHits = fNhits = 0 ;
117 fIshunt = 1 ; // All hits are associated with primary particles
119 // gets an instance of the geometry parameters class
120 fGeom = AliPHOSGeometry::GetInstance(title, "") ;
122 if (fGeom->IsInitialized() )
123 cout << "AliPHOS" << Version() << " : PHOS geometry intialized for " << fGeom->GetName() << endl ;
125 cout << "AliPHOS" << Version() << " : PHOS geometry initialization failed !" << endl ;
127 // Defining the PHOS Reconstructioner
129 fReconstructioner = Reconstructioner ;
134 //____________________________________________________________________________
135 AliPHOSv1::~AliPHOSv1()
145 if ( fEmcRecPoints ) {
146 fEmcRecPoints->Delete() ;
147 delete fEmcRecPoints ;
151 if ( fPpsdRecPoints ) {
152 fPpsdRecPoints->Delete() ;
153 delete fPpsdRecPoints ;
157 if ( fTrackSegments ) {
158 fTrackSegments->Delete() ;
159 delete fTrackSegments ;
165 //____________________________________________________________________________
166 void AliPHOSv1::AddHit(Int_t shunt, Int_t primary, Int_t tracknumber, Int_t Id, Float_t * hits)
168 // Add a hit to the hit list.
169 // A PHOS hit is the sum of all hits in a single crystal
170 // or in a single PPSD gas cell
173 TClonesArray <mphits = *fTmpHits ;
176 Bool_t deja = kFALSE ;
178 // In any case, fills the fTmpHit TClonesArray (with "accumulated hits")
180 newHit = new AliPHOSHit(shunt, primary, tracknumber, Id, hits) ;
182 // We do not want to save in TreeH the raw hits
183 // TClonesArray &lhits = *fHits;
185 for ( hitCounter = 0 ; hitCounter < fNTmpHits && !deja ; hitCounter++ ) {
186 curHit = (AliPHOSHit*) ltmphits[hitCounter] ;
187 if( *curHit == *newHit ) {
188 *curHit = *curHit + *newHit ;
194 new(ltmphits[fNTmpHits]) AliPHOSHit(*newHit) ;
198 // We do not want to save in TreeH the raw hits
199 // new(lhits[fNhits]) AliPHOSHit(*newHit) ;
202 // Please note that the fTmpHits array must survive up to the
203 // end of the events, so it does not appear e.g. in ResetHits() (
204 // which is called at the end of each primary).
210 //___________________________________________________________________________
211 Int_t AliPHOSv1::Digitize(Float_t Energy)
213 // Applies the energy calibration
215 Float_t fB = 100000000. ;
217 Int_t chan = Int_t(fA + Energy*fB ) ;
221 //___________________________________________________________________________
222 void AliPHOSv1::FinishEvent()
224 // Makes the digits from the sum of summed hit in a single crystal or PPSD gas cell
225 // Adds to the energy the electronic noise
226 // Keeps digits with energy above fDigitThreshold
228 // Save the cumulated hits instead of raw hits (need to create the branch myself)
229 // It is put in the Digit Tree because the TreeH is filled after each primary
230 // and the TreeD at the end of the event.
236 TClonesArray &lDigits = *fDigits ;
238 AliPHOSDigit * newdigit ;
239 AliPHOSDigit * curdigit ;
240 Bool_t deja = kFALSE ;
242 for ( i = 0 ; i < fNTmpHits ; i++ ) {
243 hit = (AliPHOSHit*)fTmpHits->At(i) ;
245 // Assign primary number only if contribution is significant
246 if( hit->GetEnergy() > fDigitThreshold)
247 newdigit = new AliPHOSDigit( hit->GetPrimary(), hit->GetId(), Digitize( hit->GetEnergy() ) ) ;
249 newdigit = new AliPHOSDigit( -1 , hit->GetId(), Digitize( hit->GetEnergy() ) ) ;
251 for ( j = 0 ; j < fNdigits ; j++) {
252 curdigit = (AliPHOSDigit*) lDigits[j] ;
253 if ( *curdigit == *newdigit) {
254 *curdigit = *curdigit + *newdigit ;
259 new(lDigits[fNdigits]) AliPHOSDigit(* newdigit) ;
266 // Noise induced by the PIN diode of the PbWO crystals
268 Float_t energyandnoise ;
269 for ( i = 0 ; i < fNdigits ; i++ ) {
270 newdigit = (AliPHOSDigit * ) fDigits->At(i) ;
271 fGeom->AbsToRelNumbering(newdigit->GetId(), relid) ;
273 if (relid[1]==0){ // Digits belong to EMC (PbW0_4 crystals)
274 energyandnoise = newdigit->GetAmp() + Digitize(gRandom->Gaus(0., fPinElectronicNoise)) ;
276 if (energyandnoise < 0 )
279 if ( newdigit->GetAmp() < fDigitThreshold ) // if threshold not surpassed, remove digit from list
280 fDigits->RemoveAt(i) ;
284 fDigits->Compress() ;
286 fNdigits = fDigits->GetEntries() ;
287 for (i = 0 ; i < fNdigits ; i++) {
288 newdigit = (AliPHOSDigit *) fDigits->At(i) ;
289 newdigit->SetIndexInList(i) ;
294 //___________________________________________________________________________
295 void AliPHOSv1::MakeBranch(Option_t* opt)
297 // Create new branche in the current Root Tree in the digit Tree
299 AliDetector::MakeBranch(opt) ;
302 sprintf(branchname,"%s",GetName());
303 char *cdD = strstr(opt,"D");
304 if (fDigits && gAlice->TreeD() && cdD) {
305 gAlice->TreeD()->Branch(branchname, &fDigits, fBufferSize);
308 // Create new branche PHOSCH in the current Root Tree in the digit Tree for accumulated Hits
309 if ( ! (gAlice->IsLegoRun()) ) { // only when not in lego plot mode
310 if ( fTmpHits && gAlice->TreeD() && cdD) {
311 char branchname[10] ;
312 sprintf(branchname, "%sCH", GetName()) ;
313 gAlice->TreeD()->Branch(branchname, &fTmpHits, fBufferSize) ;
320 //_____________________________________________________________________________
321 void AliPHOSv1::Reconstruction(AliPHOSReconstructioner * Reconstructioner)
323 // 1. Reinitializes the existing RecPoint, TrackSegment, and RecParticles Lists and
324 // 2. Creates TreeR with a branch for each list
325 // 3. Steers the reconstruction processes
326 // 4. Saves the 3 lists in TreeR
327 // 5. Write the Tree to File
329 fReconstructioner = Reconstructioner ;
331 char branchname[10] ;
335 // gAlice->MakeTree("R") ;
336 Int_t splitlevel = 0 ;
339 fEmcRecPoints->Delete() ;
340 delete fEmcRecPoints ;
344 // fEmcRecPoints= new AliPHOSRecPoint::RecPointsList("AliPHOSEmcRecPoint", 1000) ; if TClonesArray
345 fEmcRecPoints= new AliPHOSRecPoint::RecPointsList(2000) ;
347 if ( fEmcRecPoints && gAlice->TreeR() ) {
348 sprintf(branchname,"%sEmcRP",GetName()) ;
350 // gAlice->TreeR()->Branch(branchname, &fEmcRecPoints, fBufferSize); if TClonesArray
351 gAlice->TreeR()->Branch(branchname, "TObjArray", &fEmcRecPoints, fBufferSize, splitlevel) ;
354 if (fPpsdRecPoints) {
355 fPpsdRecPoints->Delete() ;
356 delete fPpsdRecPoints ;
360 // fPpsdRecPoints = new AliPHOSRecPoint::RecPointsList("AliPHOSPpsdRecPoint", 1000) ; if TClonesArray
361 fPpsdRecPoints = new AliPHOSRecPoint::RecPointsList(2000) ;
363 if ( fPpsdRecPoints && gAlice->TreeR() ) {
364 sprintf(branchname,"%sPpsdRP",GetName()) ;
366 // gAlice->TreeR()->Branch(branchname, &fPpsdRecPoints, fBufferSize); if TClonesArray
367 gAlice->TreeR()->Branch(branchname, "TObjArray", &fPpsdRecPoints, fBufferSize, splitlevel) ;
370 if (fTrackSegments) {
371 fTrackSegments->Delete() ;
372 delete fTrackSegments ;
376 fTrackSegments = new AliPHOSTrackSegment::TrackSegmentsList("AliPHOSTrackSegment", 2000) ;
377 if ( fTrackSegments && gAlice->TreeR() ) {
378 sprintf(branchname,"%sTS",GetName()) ;
379 gAlice->TreeR()->Branch(branchname, &fTrackSegments, fBufferSize) ;
383 fRecParticles->Delete() ;
384 delete fRecParticles ;
387 fRecParticles = new AliPHOSRecParticle::RecParticlesList("AliPHOSRecParticle", 2000) ;
388 if ( fRecParticles && gAlice->TreeR() ) {
389 sprintf(branchname,"%sRP",GetName()) ;
390 gAlice->TreeR()->Branch(branchname, &fRecParticles, fBufferSize) ;
395 fReconstructioner->Make(fDigits, fEmcRecPoints, fPpsdRecPoints, fTrackSegments, fRecParticles);
397 // 4. Expand or Shrink the arrays to the proper size
401 size = fEmcRecPoints->GetEntries() ;
402 fEmcRecPoints->Expand(size) ;
404 size = fPpsdRecPoints->GetEntries() ;
405 fPpsdRecPoints->Expand(size) ;
407 size = fTrackSegments->GetEntries() ;
408 fTrackSegments->Expand(size) ;
410 size = fRecParticles->GetEntries() ;
411 fRecParticles->Expand(size) ;
413 gAlice->TreeR()->Fill() ;
416 gAlice->TreeR()->Write(0,TObject::kOverwrite) ;
418 // Deleting reconstructed objects
419 ResetReconstruction();
423 //____________________________________________________________________________
424 void AliPHOSv1::ResetDigits()
426 // May sound strange, but cumulative hits are store in digits Tree
427 AliDetector::ResetDigits();
433 //____________________________________________________________________________
434 void AliPHOSv1::ResetReconstruction()
436 // Deleting reconstructed objects
438 if ( fEmcRecPoints ) fEmcRecPoints->Delete();
439 if ( fPpsdRecPoints ) fPpsdRecPoints->Delete();
440 if ( fTrackSegments ) fTrackSegments->Delete();
441 if ( fRecParticles ) fRecParticles->Delete();
445 //____________________________________________________________________________
446 void AliPHOSv1::SetTreeAddress()
449 AliPHOS::SetTreeAddress();
451 // //Branch address for TreeR: RecPpsdRecPoint
452 // TTree *treeR = gAlice->TreeR();
453 // if ( treeR && fPpsdRecPoints ) {
454 // branch = treeR->GetBranch("PHOSPpsdRP");
455 // if (branch) branch->SetAddress(&fPpsdRecPoints) ;
459 //____________________________________________________________________________
461 void AliPHOSv1::StepManager(void)
463 // Accumulates hits as long as the track stays in a single crystal or PPSD gas Cell
465 Int_t relid[4] ; // (box, layer, row, column) indices
466 Float_t xyze[4] ; // position wrt MRS and energy deposited
470 Int_t tracknumber = gAlice->CurrentTrack() ;
471 Int_t primary = gAlice->GetPrimary( gAlice->CurrentTrack() );
472 TString name = fGeom->GetName() ;
473 if ( name == "GPS2" ) { // the CPV is a PPSD
474 if( gMC->CurrentVolID(copy) == gMC->VolId("GCEL") ) // We are inside a gas cell
476 gMC->TrackPosition(pos) ;
480 xyze[3] = gMC->Edep() ;
482 if ( xyze[3] != 0 ) { // there is deposited energy
483 gMC->CurrentVolOffID(5, relid[0]) ; // get the PHOS Module number
484 gMC->CurrentVolOffID(3, relid[1]) ; // get the Micromegas Module number
485 // 1-> Geom->GetNumberOfModulesPhi() * fGeom->GetNumberOfModulesZ() upper
486 // > fGeom->GetNumberOfModulesPhi() * fGeom->GetNumberOfModulesZ() lower
487 gMC->CurrentVolOffID(1, relid[2]) ; // get the row number of the cell
488 gMC->CurrentVolID(relid[3]) ; // get the column number
490 // get the absolute Id number
493 fGeom->RelToAbsNumbering(relid, absid) ;
495 // add current hit to the hit list
496 AddHit(fIshunt, primary, tracknumber, absid, xyze);
498 } // there is deposited energy
499 } // We are inside the gas of the CPV
500 } // GPS2 configuration
502 if(gMC->CurrentVolID(copy) == gMC->VolId("PXTL") ) // We are inside a PBWO crystal
504 gMC->TrackPosition(pos) ;
508 xyze[3] = gMC->Edep() ;
510 if ( xyze[3] != 0 ) {
511 gMC->CurrentVolOffID(10, relid[0]) ; // get the PHOS module number ;
512 relid[1] = 0 ; // means PBW04
513 gMC->CurrentVolOffID(4, relid[2]) ; // get the row number inside the module
514 gMC->CurrentVolOffID(3, relid[3]) ; // get the cell number inside the module
516 // get the absolute Id number
519 fGeom->RelToAbsNumbering(relid, absid) ;
521 // add current hit to the hit list
523 AddHit(fIshunt, primary,tracknumber, absid, xyze);
525 } // there is deposited energy
526 } // we are inside a PHOS Xtal