1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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 **************************************************************************/
18 ///////////////////////////////////////////////////////////////////////////////
20 // The standard TRD tracker //
21 // Based on Kalman filltering approach //
24 // M. Ivanov (Marian.Ivanov@cern.ch) //
25 // Y. Belikov (Jouri.Belikov@cern.ch) //
27 ///////////////////////////////////////////////////////////////////////////////
30 #include <Riostream.h>
36 #include <TLinearFitter.h>
37 #include <TObjArray.h>
40 #include <TTreeStream.h>
43 #include "AliAlignObj.h"
44 #include "AliRieman.h"
45 #include "AliTrackPointArray.h"
47 #include "AliTRDgeometry.h"
48 #include "AliTRDpadPlane.h"
49 #include "AliTRDgeometry.h"
50 #include "AliTRDcluster.h"
51 #include "AliTRDtrack.h"
52 #include "AliTRDseed.h"
53 #include "AliTRDcalibDB.h"
54 #include "AliTRDCommonParam.h"
55 #include "AliTRDtracker.h"
56 #include "AliTRDReconstructor.h"
57 #include "AliTRDCalibraFillHisto.h"
59 ClassImp(AliTRDtracker)
61 const Float_t AliTRDtracker::fgkMinClustersInTrack = 0.5; //
62 const Float_t AliTRDtracker::fgkLabelFraction = 0.8; //
63 const Double_t AliTRDtracker::fgkMaxChi2 = 12.0; //
64 const Double_t AliTRDtracker::fgkMaxSnp = 0.95; // Corresponds to tan = 3
65 const Double_t AliTRDtracker::fgkMaxStep = 2.0; // Maximal step size in propagation
67 //_____________________________________________________________________________
68 AliTRDtracker::AliTRDtracker()
95 // Default constructor
98 for (Int_t i = 0; i < kTrackingSectors; i++) {
101 for (Int_t j = 0; j < 5; j++) {
102 for (Int_t k = 0; k < 18; k++) {
103 fHoles[j][k] = kFALSE;
111 //_____________________________________________________________________________
112 AliTRDtracker::AliTRDtracker(const AliTRDtracker &t)
133 ,fTimeBinsPerPlane(0)
134 ,fAddTRDseeds(kFALSE)
144 //_____________________________________________________________________________
145 AliTRDtracker::AliTRDtracker(const TFile *geomfile)
161 ,fClusters(new TObjArray(2000))
163 ,fSeeds(new TObjArray(2000))
165 ,fTracks(new TObjArray(1000))
166 ,fTimeBinsPerPlane(0)
167 ,fAddTRDseeds(kFALSE)
175 TDirectory *savedir = gDirectory;
176 TFile *in = (TFile *) geomfile;
179 AliWarning("geometry file is not open!\n");
180 AliWarning("FULL TRD geometry and DEFAULT TRD parameter will be used\n");
184 fGeom = (AliTRDgeometry *) in->Get("TRDgeometry");
188 AliWarning("Cannot find TRD geometry!\n");
189 fGeom = new AliTRDgeometry();
191 fGeom->ReadGeoMatrices();
195 for (Int_t geomS = 0; geomS < kTrackingSectors; geomS++) {
197 fTrSec[trS] = new AliTRDtrackingSector(fGeom,geomS);
198 for (Int_t icham = 0; icham < AliTRDgeometry::kNcham; icham++) {
199 fHoles[icham][trS] = fGeom->IsHole(0,icham,geomS);
203 AliTRDpadPlane *padPlane = AliTRDCommonParam::Instance()->GetPadPlane(0,0);
204 Float_t tiltAngle = TMath::Abs(padPlane->GetTiltingAngle());
205 if (tiltAngle < 0.1) {
209 if (!AliTRDcalibDB::Instance()) {
210 AliFatal("Could not get calibration object");
212 fTimeBinsPerPlane = AliTRDcalibDB::Instance()->GetNumberOfTimeBins();
214 fDebugStreamer = new TTreeSRedirector("TRDdebug.root");
222 //_____________________________________________________________________________
223 AliTRDtracker::~AliTRDtracker()
226 // Destructor of AliTRDtracker
246 for (Int_t geomS = 0; geomS < kTrackingSectors; geomS++) {
247 delete fTrSec[geomS];
250 if (fDebugStreamer) {
251 delete fDebugStreamer;
256 //_____________________________________________________________________________
257 Int_t AliTRDtracker::LocalToGlobalID(Int_t lid)
260 // Transform internal TRD ID to global detector ID
263 Int_t isector = fGeom->GetSector(lid);
264 Int_t ichamber = fGeom->GetChamber(lid);
265 Int_t iplan = fGeom->GetPlane(lid);
267 AliGeomManager::ELayerID iLayer = AliGeomManager::kTRD1;
270 iLayer = AliGeomManager::kTRD1;
273 iLayer = AliGeomManager::kTRD2;
276 iLayer = AliGeomManager::kTRD3;
279 iLayer = AliGeomManager::kTRD4;
282 iLayer = AliGeomManager::kTRD5;
285 iLayer = AliGeomManager::kTRD6;
289 Int_t modId = isector * fGeom->Ncham() + ichamber;
290 UShort_t volid = AliGeomManager::LayerToVolUID(iLayer,modId);
296 //_____________________________________________________________________________
297 Int_t AliTRDtracker::GlobalToLocalID(Int_t gid)
300 // Transform global detector ID to local detector ID
304 AliGeomManager::ELayerID layerId = AliGeomManager::VolUIDToLayer(gid,modId);
306 Int_t isector = modId / fGeom->Ncham();
307 Int_t ichamber = modId % fGeom->Ncham();
311 case AliGeomManager::kTRD1:
314 case AliGeomManager::kTRD2:
317 case AliGeomManager::kTRD3:
320 case AliGeomManager::kTRD4:
323 case AliGeomManager::kTRD5:
326 case AliGeomManager::kTRD6:
337 Int_t lid = fGeom->GetDetector(iLayer,ichamber,isector);
343 //_____________________________________________________________________________
344 Bool_t AliTRDtracker::Transform(AliTRDcluster *cluster)
347 // Transform something ... whatever ...
350 // Magic constants for geo manager transformation
351 const Double_t kX0shift = 2.52;
352 const Double_t kX0shift5 = 3.05;
355 // Apply alignment and calibration to transform cluster
357 Int_t detector = cluster->GetDetector();
358 Int_t plane = fGeom->GetPlane(cluster->GetDetector());
359 Int_t chamber = fGeom->GetChamber(cluster->GetDetector());
360 Int_t sector = fGeom->GetSector(cluster->GetDetector());
362 Double_t dxAmp = (Double_t) fGeom->CamHght(); // Amplification region
363 Double_t driftX = TMath::Max(cluster->GetX()-dxAmp*0.5,0.0); // Drift distance
368 Double_t vdrift = AliTRDcalibDB::Instance()->GetVdrift(cluster->GetDetector(),0,0);
369 Double_t exB = AliTRDcalibDB::Instance()->GetOmegaTau(vdrift,-AliTracker::GetBz()*0.1);
371 AliTRDCommonParam *commonParam = AliTRDCommonParam::Instance();
372 AliTRDpadPlane *padPlane = commonParam->GetPadPlane(plane,chamber);
373 Double_t zshiftIdeal = 0.5*(padPlane->GetRow0()+padPlane->GetRowEnd());
374 Double_t localPos[3];
375 Double_t localPosTracker[3];
376 localPos[0] = -cluster->GetX();
377 localPos[1] = cluster->GetY() - driftX * exB;
378 localPos[2] = cluster->GetZ() - zshiftIdeal;
380 cluster->SetY(cluster->GetY() - driftX*exB);
381 Double_t xplane = (Double_t) AliTRDgeometry::GetTime0(plane);
382 cluster->SetX(xplane - cluster->GetX());
384 TGeoHMatrix *matrix = fGeom->GetCorrectionMatrix(cluster->GetDetector());
386 // No matrix found - if somebody used geometry with holes
387 AliError("Invalid Geometry - Default Geometry used\n");
390 matrix->LocalToMaster(localPos,localPosTracker);
392 if (AliTRDReconstructor::StreamLevel() > 1) {
393 (* fDebugStreamer) << "Transform"
395 << "matrix.=" << matrix
396 << "Detector=" << detector
397 << "Sector=" << sector
399 << "Chamber=" << chamber
400 << "lx0=" << localPosTracker[0]
401 << "ly0=" << localPosTracker[1]
402 << "lz0=" << localPosTracker[2]
407 cluster->SetX(localPosTracker[0]+kX0shift5);
410 cluster->SetX(localPosTracker[0]+kX0shift);
413 cluster->SetY(localPosTracker[1]);
414 cluster->SetZ(localPosTracker[2]);
420 //_____________________________________________________________________________
421 // Bool_t AliTRDtracker::Transform(AliTRDcluster *cluster)
424 // // Is this still needed ????
426 // const Double_t kDriftCorrection = 1.01; // drift coeficient correction
427 // const Double_t kTime0Cor = 0.32; // time0 correction
429 // const Double_t kX0shift = 2.52;
430 // const Double_t kX0shift5 = 3.05;
433 // // apply alignment and calibration to transform cluster
436 // Int_t detector = cluster->GetDetector();
437 // Int_t plane = fGeom->GetPlane(cluster->GetDetector());
438 // Int_t chamber = fGeom->GetChamber(cluster->GetDetector());
439 // Int_t sector = fGeom->GetSector(cluster->GetDetector());
441 // Double_t dxAmp = (Double_t) fGeom->CamHght(); // Amplification region
442 // Double_t driftX = TMath::Max(cluster->GetX()-dxAmp*0.5,0.); // drift distance
446 // Double_t vdrift = AliTRDcalibDB::Instance()->GetVdrift(cluster->GetDetector(),0,0);
447 // Double_t exB = AliTRDcalibDB::Instance()->GetOmegaTau(vdrift,-AliTracker::GetBz()*0.1);
450 // AliTRDCommonParam* commonParam = AliTRDCommonParam::Instance();
451 // AliTRDpadPlane * padPlane = commonParam->GetPadPlane(plane,chamber);
452 // Double_t zshiftIdeal = 0.5*(padPlane->GetRow0()+padPlane->GetRowEnd());
453 // Double_t localPos[3], globalPos[3], localPosTracker[3], localPosTracker2[3];
454 // localPos[2] = -cluster->GetX();
455 // localPos[0] = cluster->GetY() - driftX*exB;
456 // localPos[1] = cluster->GetZ() -zshiftIdeal;
457 // TGeoHMatrix * matrix = fGeom->GetGeoMatrix(cluster->GetDetector());
458 // matrix->LocalToMaster(localPos, globalPos);
460 // Double_t sectorAngle = 20.*(sector%18)+10;
461 // TGeoHMatrix rotSector;
462 // rotSector.RotateZ(sectorAngle);
463 // rotSector.LocalToMaster(globalPos, localPosTracker);
466 // TGeoHMatrix matrix2(*matrix);
467 // matrix2.MultiplyLeft(&rotSector);
468 // matrix2.LocalToMaster(localPos,localPosTracker2);
472 // cluster->SetY(cluster->GetY() - driftX*exB);
473 // Double_t xplane = (Double_t) AliTRDgeometry::GetTime0(plane);
474 // cluster->SetX(xplane- kDriftCorrection*(cluster->GetX()-kTime0Cor));
475 // (*fDebugStreamer)<<"Transform"<<
477 // "matrix.="<<matrix<<
478 // "matrix2.="<<&matrix2<<
479 // "Detector="<<detector<<
480 // "Sector="<<sector<<
482 // "Chamber="<<chamber<<
483 // "lx0="<<localPosTracker[0]<<
484 // "ly0="<<localPosTracker[1]<<
485 // "lz0="<<localPosTracker[2]<<
486 // "lx2="<<localPosTracker2[0]<<
487 // "ly2="<<localPosTracker2[1]<<
488 // "lz2="<<localPosTracker2[2]<<
492 // cluster->SetX(localPosTracker[0]+kX0shift5);
494 // cluster->SetX(localPosTracker[0]+kX0shift);
496 // cluster->SetY(localPosTracker[1]);
497 // cluster->SetZ(localPosTracker[2]);
501 //_____________________________________________________________________________
502 Bool_t AliTRDtracker::AdjustSector(AliTRDtrack *track)
505 // Rotates the track when necessary
508 Double_t alpha = AliTRDgeometry::GetAlpha();
509 Double_t y = track->GetY();
510 Double_t ymax = track->GetX()*TMath::Tan(0.5*alpha);
512 // Is this still needed ????
513 //Int_t ns = AliTRDgeometry::kNsect;
514 //Int_t s=Int_t(track->GetAlpha()/alpha)%ns;
518 if (!track->Rotate( alpha)) {
522 else if (y < -ymax) {
524 if (!track->Rotate(-alpha)) {
533 //_____________________________________________________________________________
534 AliTRDcluster *AliTRDtracker::GetCluster(AliTRDtrack *track, Int_t plane
535 , Int_t timebin, UInt_t &index)
538 // Try to find cluster in the backup list
541 AliTRDcluster *cl =0;
542 Int_t *indexes = track->GetBackupIndexes();
544 for (UInt_t i = 0; i < kMaxTimeBinIndex; i++) {
545 if (indexes[i] == 0) {
548 AliTRDcluster *cli = (AliTRDcluster *) fClusters->UncheckedAt(indexes[i]);
552 if (cli->GetLocalTimeBin() != timebin) {
555 Int_t iplane = fGeom->GetPlane(cli->GetDetector());
556 if (iplane == plane) {
567 //_____________________________________________________________________________
568 Int_t AliTRDtracker::GetLastPlane(AliTRDtrack *track)
571 // Return last updated plane
575 Int_t *indexes = track->GetBackupIndexes();
577 for (UInt_t i = 0; i < kMaxTimeBinIndex; i++) {
578 AliTRDcluster *cli = (AliTRDcluster *) fClusters->UncheckedAt(indexes[i]);
582 Int_t iplane = fGeom->GetPlane(cli->GetDetector());
583 if (iplane > lastplane) {
592 //_____________________________________________________________________________
593 Int_t AliTRDtracker::Clusters2Tracks(AliESD *event)
596 // Finds tracks within the TRD. The ESD event is expected to contain seeds
597 // at the outer part of the TRD. The seeds
598 // are found within the TRD if fAddTRDseeds is TRUE.
599 // The tracks are propagated to the innermost time bin
600 // of the TRD and the ESD event is updated
603 Int_t timeBins = fTrSec[0]->GetNumberOfTimeBins();
604 Float_t foundMin = fgkMinClustersInTrack * timeBins;
607 //Int_t innerTB = fTrSec[0]->GetInnerTimeBin();
609 Int_t n = event->GetNumberOfTracks();
610 for (Int_t i = 0; i < n; i++) {
612 AliESDtrack *seed = event->GetTrack(i);
613 ULong_t status = seed->GetStatus();
614 if ((status & AliESDtrack::kTRDout) == 0) {
617 if ((status & AliESDtrack::kTRDin) != 0) {
622 AliTRDtrack *seed2 = new AliTRDtrack(*seed);
623 //seed2->ResetCovariance();
624 AliTRDtrack *pt = new AliTRDtrack(*seed2,seed2->GetAlpha());
625 AliTRDtrack &t = *pt;
626 FollowProlongation(t);
627 if (t.GetNumberOfClusters() >= foundMin) {
629 CookLabel(pt,1 - fgkLabelFraction);
634 Double_t xTPC = 250.0;
635 if (PropagateToX(t,xTPC,fgkMaxStep)) {
636 seed->UpdateTrackParams(pt, AliESDtrack::kTRDin);
643 AliInfo(Form("Number of loaded seeds: %d",nseed));
644 AliInfo(Form("Number of found tracks from loaded seeds: %d",found));
645 AliInfo(Form("Total number of found tracks: %d",found));
651 //_____________________________________________________________________________
652 Int_t AliTRDtracker::PropagateBack(AliESD *event)
655 // Gets seeds from ESD event. The seeds are AliTPCtrack's found and
656 // backpropagated by the TPC tracker. Each seed is first propagated
657 // to the TRD, and then its prolongation is searched in the TRD.
658 // If sufficiently long continuation of the track is found in the TRD
659 // the track is updated, otherwise it's stored as originaly defined
660 // by the TPC tracker.
663 Int_t found = 0; // number of tracks found
664 Float_t foundMin = 20.0;
665 Int_t n = event->GetNumberOfTracks();
668 Float_t *quality = new Float_t[n];
669 Int_t *index = new Int_t[n];
670 for (Int_t i = 0; i < n; i++) {
671 AliESDtrack *seed = event->GetTrack(i);
672 Double_t covariance[15];
673 seed->GetExternalCovariance(covariance);
674 quality[i] = covariance[0]+covariance[2];
675 //quality[i] = covariance[0];
677 TMath::Sort(n,quality,index,kFALSE);
679 for (Int_t i = 0; i < n; i++) {
681 //AliESDtrack *seed = event->GetTrack(i);
682 AliESDtrack *seed = event->GetTrack(index[i]);
685 ULong_t status = seed->GetStatus();
686 if ((status & AliESDtrack::kTPCout) == 0) {
691 if ((status & AliESDtrack::kTRDout) != 0) {
696 Int_t lbl = seed->GetLabel();
697 AliTRDtrack *track = new AliTRDtrack(*seed);
698 track->SetSeedLabel(lbl);
699 seed->UpdateTrackParams(track,AliESDtrack::kTRDbackup); // Make backup
701 Float_t p4 = track->GetC();
702 Int_t expectedClr = FollowBackProlongation(*track);
705 fHX->Fill(track->GetX());
708 // store the last measurement
710 fHNClTrack->Fill(track->GetNumberOfClusters());
711 if (track->GetNumberOfClusters() >= foundMin) {
715 CookdEdxTimBin(*track);
716 CookLabel(track,1 - fgkLabelFraction);
717 if (track->GetBackupTrack()) {
718 //fHBackfit->Fill(5);
719 UseClusters(track->GetBackupTrack());
720 seed->UpdateTrackParams(track->GetBackupTrack(),AliESDtrack::kTRDbackup);
726 // inter-tracks competition ???
727 if ((TMath::Abs(track->GetC() - p4) / TMath::Abs(p4) < 0.2) ||
728 (TMath::Abs(track->GetPt()) > 0.8)) {
733 // Make backup for back propagation
736 Int_t foundClr = track->GetNumberOfClusters();
737 if (foundClr >= foundMin) {
739 CookdEdxTimBin(*track);
740 CookLabel(track,1 - fgkLabelFraction);
741 if (track->GetBackupTrack()) {
742 UseClusters(track->GetBackupTrack());
745 // Sign only gold tracks
746 if (track->GetChi2() / track->GetNumberOfClusters() < 4) {
747 if ((seed->GetKinkIndex(0) == 0) &&
748 (TMath::Abs(track->GetPt()) < 1.5)) {
752 Bool_t isGold = kFALSE;
755 if (track->GetChi2() / track->GetNumberOfClusters() < 5) {
756 //seed->UpdateTrackParams(track, AliESDtrack::kTRDbackup);
757 if (track->GetBackupTrack()) {
758 seed->UpdateTrackParams(track->GetBackupTrack(),AliESDtrack::kTRDbackup);
767 (track->GetNCross() == 0) &&
768 (track->GetChi2() / track->GetNumberOfClusters() < 7)) {
769 //seed->UpdateTrackParams(track, AliESDtrack::kTRDbackup);
770 if (track->GetBackupTrack()) {
771 seed->UpdateTrackParams(track->GetBackupTrack(),AliESDtrack::kTRDbackup);
777 (track->GetBackupTrack())) {
778 if ((track->GetBackupTrack()->GetNumberOfClusters() > foundMin) &&
779 ((track->GetBackupTrack()->GetChi2()/(track->GetBackupTrack()->GetNumberOfClusters()+1)) < 7)) {
780 seed->UpdateTrackParams(track->GetBackupTrack(),AliESDtrack::kTRDbackup);
785 if ((track->StatusForTOF() > 0) &&
786 (track->GetNCross() == 0) &&
787 (Float_t(track->GetNumberOfClusters()) / Float_t(track->GetNExpected()) > 0.4)) {
788 //seed->UpdateTrackParams(track->GetBackupTrack(), AliESDtrack::kTRDbackup);
796 // Debug part of tracking
797 TTreeSRedirector &cstream = *fDebugStreamer;
798 Int_t eventNrInFile = event->GetEventNumberInFile(); // This is most likely NOT the event number you'd like to use. It has nothing to do with the 'real' event number.
799 if (AliTRDReconstructor::StreamLevel() > 0) {
800 if (track->GetBackupTrack()) {
802 << "EventNrInFile=" << eventNrInFile
805 << "trdback.=" << track->GetBackupTrack()
810 << "EventNrInFile=" << eventNrInFile
813 << "trdback.=" << track
819 // Propagation to the TOF (I.Belikov)
820 if (track->GetStop() == kFALSE) {
823 Double_t xtof = 371.0;
824 Double_t xTOF0 = 370.0;
826 Double_t c2 = track->GetSnp() + track->GetC() * (xtof - track->GetX());
827 if (TMath::Abs(c2) >= 0.99) {
834 PropagateToX(*track,xTOF0,fgkMaxStep);
836 // Energy losses taken to the account - check one more time
837 c2 = track->GetSnp() + track->GetC() * (xtof - track->GetX());
838 if (TMath::Abs(c2) >= 0.99) {
845 //if (!PropagateToX(*track,xTOF0,fgkMaxStep)) {
846 // fHBackfit->Fill(7);
851 Double_t ymax = xtof * TMath::Tan(0.5 * AliTRDgeometry::GetAlpha());
853 track->GetYAt(xtof,GetBz(),y);
855 if (!track->Rotate( AliTRDgeometry::GetAlpha())) {
861 else if (y < -ymax) {
862 if (!track->Rotate(-AliTRDgeometry::GetAlpha())) {
869 if (track->PropagateTo(xtof)) {
870 seed->UpdateTrackParams(track,AliESDtrack::kTRDout);
873 for (Int_t i = 0; i < AliESDtrack::kNPlane; i++) {
874 for (Int_t j = 0; j < AliESDtrack::kNSlice; j++) {
875 seed->SetTRDsignals(track->GetPIDsignals(i,j),i,j);
877 seed->SetTRDTimBin(track->GetPIDTimBin(i),i);
879 //seed->SetTRDtrack(new AliTRDtrack(*track));
880 if (track->GetNumberOfClusters() > foundMin) {
891 if ((track->GetNumberOfClusters() > 15) &&
892 (track->GetNumberOfClusters() > 0.5*expectedClr)) {
894 seed->UpdateTrackParams(track,AliESDtrack::kTRDout);
897 //seed->SetStatus(AliESDtrack::kTRDStop);
898 for (Int_t i = 0; i < AliESDtrack::kNPlane; i++) {
899 for (Int_t j = 0; j <AliESDtrack::kNSlice; j++) {
900 seed->SetTRDsignals(track->GetPIDsignals(i,j),i,j);
902 seed->SetTRDTimBin(track->GetPIDTimBin(i),i);
904 //seed->SetTRDtrack(new AliTRDtrack(*track));
910 seed->SetTRDQuality(track->StatusForTOF());
911 seed->SetTRDBudget(track->GetBudget(0));
917 AliInfo(Form("Number of seeds: %d",fNseeds));
918 AliInfo(Form("Number of back propagated TRD tracks: %d",found));
921 if (AliTRDReconstructor::SeedingOn()) {
922 MakeSeedsMI(3,5,event);
936 //_____________________________________________________________________________
937 Int_t AliTRDtracker::RefitInward(AliESD *event)
940 // Refits tracks within the TRD. The ESD event is expected to contain seeds
941 // at the outer part of the TRD.
942 // The tracks are propagated to the innermost time bin
943 // of the TRD and the ESD event is updated
944 // Origin: Thomas KUHR (Thomas.Kuhr@cern.ch)
947 Int_t timeBins = fTrSec[0]->GetNumberOfTimeBins();
948 Float_t foundMin = fgkMinClustersInTrack * timeBins;
951 //Int_t innerTB = fTrSec[0]->GetInnerTimeBin();
954 Int_t n = event->GetNumberOfTracks();
955 for (Int_t i = 0; i < n; i++) {
957 AliESDtrack *seed = event->GetTrack(i);
958 new (&seed2) AliTRDtrack(*seed);
961 if (seed2.GetX() < 270.0) {
962 seed->UpdateTrackParams(&seed2,AliESDtrack::kTRDbackup); // Backup TPC track - only update
967 ULong_t status = seed->GetStatus();
968 if ((status & AliESDtrack::kTRDout) == 0) {
972 if ((status & AliESDtrack::kTRDin) != 0) {
980 seed2.ResetCovariance(50.0);
982 AliTRDtrack *pt = new AliTRDtrack(seed2,seed2.GetAlpha());
983 Int_t *indexes2 = seed2.GetIndexes();
984 for (Int_t i = 0; i < AliESDtrack::kNPlane;i++) {
985 for (Int_t j = 0; j < AliESDtrack::kNSlice;j++) {
986 pt->SetPIDsignals(seed2.GetPIDsignals(i,j),i,j);
988 pt->SetPIDTimBin(seed2.GetPIDTimBin(i),i);
991 Int_t *indexes3 = pt->GetBackupIndexes();
992 for (Int_t i = 0; i < 200;i++) {
993 if (indexes2[i] == 0) {
996 indexes3[i] = indexes2[i];
999 //AliTRDtrack *pt = seed2;
1000 AliTRDtrack &t = *pt;
1001 FollowProlongation(t);
1002 if (t.GetNumberOfClusters() >= foundMin) {
1004 //CookLabel(pt, 1-fgkLabelFraction);
1010 Double_t xTPC = 250.0;
1011 if (PropagateToX(t,xTPC,fgkMaxStep)) {
1013 seed->UpdateTrackParams(pt,AliESDtrack::kTRDrefit);
1016 for (Int_t i = 0; i < AliESDtrack::kNPlane; i++) {
1017 for (Int_t j = 0; j < AliESDtrack::kNSlice; j++) {
1018 seed->SetTRDsignals(pt->GetPIDsignals(i,j),i,j);
1020 seed->SetTRDTimBin(pt->GetPIDTimBin(i),i);
1024 // If not prolongation to TPC - propagate without update
1026 AliTRDtrack *seed2 = new AliTRDtrack(*seed);
1027 seed2->ResetCovariance(5.0);
1028 AliTRDtrack *pt2 = new AliTRDtrack(*seed2,seed2->GetAlpha());
1030 if (PropagateToX(*pt2,xTPC,fgkMaxStep)) {
1032 CookdEdxTimBin(*pt2);
1033 seed->UpdateTrackParams(pt2,AliESDtrack::kTRDrefit);
1036 for (Int_t i = 0; i < AliESDtrack::kNPlane; i++) {
1037 for (Int_t j = 0; j < AliESDtrack::kNSlice; j++) {
1038 seed->SetTRDsignals(pt2->GetPIDsignals(i,j),i,j);
1040 seed->SetTRDTimBin(pt2->GetPIDTimBin(i),i);
1050 AliInfo(Form("Number of loaded seeds: %d",nseed));
1051 AliInfo(Form("Number of found tracks from loaded seeds: %d",found));
1057 //_____________________________________________________________________________
1058 Int_t AliTRDtracker::FollowProlongation(AliTRDtrack &t)
1061 // Starting from current position on track=t this function tries
1062 // to extrapolate the track up to timeBin=0 and to confirm prolongation
1063 // if a close cluster is found. Returns the number of clusters
1064 // expected to be found in sensitive layers
1065 // GeoManager used to estimate mean density
1069 Int_t lastplane = GetLastPlane(&t);
1070 Double_t radLength = 0.0;
1072 Int_t expectedNumberOfClusters = 0;
1074 for (Int_t iplane = lastplane; iplane >= 0; iplane--) {
1076 Int_t row0 = GetGlobalTimeBin(0,iplane,GetTimeBinsPerPlane()-1);
1077 Int_t rowlast = GetGlobalTimeBin(0,iplane,0);
1080 // Propagate track close to the plane if neccessary
1082 Double_t currentx = fTrSec[0]->GetLayer(rowlast)->GetX();
1083 if (currentx < (-fgkMaxStep + t.GetX())) {
1084 // Propagate closer to chamber - safety space fgkMaxStep
1085 if (!PropagateToX(t,currentx+fgkMaxStep,fgkMaxStep)) {
1090 if (!AdjustSector(&t)) {
1095 // Get material budget
1104 // Starting global position
1106 // End global position
1107 x = fTrSec[0]->GetLayer(row0)->GetX();
1108 if (!t.GetProlongation(x,y,z)) {
1111 xyz1[0] = x * TMath::Cos(t.GetAlpha()) - y * TMath::Sin(t.GetAlpha());
1112 xyz1[1] = +x * TMath::Sin(t.GetAlpha()) + y * TMath::Cos(t.GetAlpha());
1114 AliKalmanTrack::MeanMaterialBudget(xyz0,xyz1,param);
1116 radLength = param[1]; // Get mean propagation parameters
1119 // Propagate and update
1121 sector = t.GetSector();
1122 //for (Int_t itime=GetTimeBinsPerPlane()-1;itime>=0;itime--) {
1123 for (Int_t itime = 0 ; itime < GetTimeBinsPerPlane(); itime++) {
1125 Int_t ilayer = GetGlobalTimeBin(0,iplane,itime);
1126 expectedNumberOfClusters++;
1127 t.SetNExpected(t.GetNExpected() + 1);
1128 if (t.GetX() > 345.0) {
1129 t.SetNExpectedLast(t.GetNExpectedLast() + 1);
1131 AliTRDpropagationLayer &timeBin = *(fTrSec[sector]->GetLayer(ilayer));
1132 AliTRDcluster *cl = 0;
1134 Double_t maxChi2 = fgkMaxChi2;
1139 AliTRDcluster *cl0 = timeBin[0];
1141 // No clusters in given time bin
1145 Int_t plane = fGeom->GetPlane(cl0->GetDetector());
1146 if (plane > lastplane) {
1150 Int_t timebin = cl0->GetLocalTimeBin();
1151 AliTRDcluster *cl2 = GetCluster(&t,plane,timebin,index);
1156 //Double_t h01 = GetTiltFactor(cl); //I.B's fix
1157 //maxChi2=t.GetPredictedChi2(cl,h01);
1162 //if (cl->GetNPads()<5)
1163 Double_t dxsample = timeBin.GetdX();
1164 t.SetSampledEdx(TMath::Abs(cl->GetQ()/dxsample));
1165 Double_t h01 = GetTiltFactor(cl);
1166 Int_t det = cl->GetDetector();
1167 Int_t plane = fGeom->GetPlane(det);
1168 if (t.GetX() > 345.0) {
1169 t.SetNLast(t.GetNLast() + 1);
1170 t.SetChi2Last(t.GetChi2Last() + maxChi2);
1173 Double_t xcluster = cl->GetX();
1174 t.PropagateTo(xcluster,radLength,rho);
1176 if (!AdjustSector(&t)) {
1179 maxChi2 = t.GetPredictedChi2(cl,h01);
1182 if (!t.UpdateMI(cl,maxChi2,index,h01,plane)) {
1194 return expectedNumberOfClusters;
1198 //_____________________________________________________________________________
1199 Int_t AliTRDtracker::FollowBackProlongation(AliTRDtrack &t)
1202 // Starting from current radial position of track <t> this function
1203 // extrapolates the track up to outer timebin and in the sensitive
1204 // layers confirms prolongation if a close cluster is found.
1205 // Returns the number of clusters expected to be found in sensitive layers
1206 // Use GEO manager for material Description
1208 // return number of assigned clusters ?
1213 Int_t clusters[1000];
1214 Double_t radLength = 0.0;
1216 Int_t expectedNumberOfClusters = 0;
1217 Float_t ratio0 = 0.0;
1218 AliTRDtracklet tracklet;
1220 // Calibration fill 2D
1221 AliTRDCalibraFillHisto *calibra = AliTRDCalibraFillHisto::Instance();
1223 AliInfo("Could not get Calibra instance\n");
1225 if (calibra->GetMITracking()) {
1226 calibra->ResetTrack();
1229 for (Int_t i = 0; i < 1000; i++) {
1233 for (Int_t iplane = 0; iplane < AliESDtrack::kNPlane; iplane++) {
1235 int hb = iplane * 10;
1236 fHClSearch->Fill(hb);
1238 Int_t row0 = GetGlobalTimeBin(0,iplane,GetTimeBinsPerPlane()-1);
1239 Int_t rowlast = GetGlobalTimeBin(0,iplane,0);
1240 Double_t currentx = fTrSec[0]->GetLayer(row0)->GetX();
1241 if (currentx < t.GetX()) {
1242 fHClSearch->Fill(hb+1);
1247 // Propagate closer to chamber if neccessary
1249 if (currentx > (fgkMaxStep + t.GetX())) {
1250 if (!PropagateToX(t,currentx-fgkMaxStep,fgkMaxStep)) {
1251 fHClSearch->Fill(hb+2);
1255 if (!AdjustSector(&t)) {
1256 fHClSearch->Fill(hb+3);
1259 if (TMath::Abs(t.GetSnp()) > fgkMaxSnp) {
1260 fHClSearch->Fill(hb+4);
1265 // Get material budget inside of chamber
1273 // Starting global position
1275 // End global position
1276 x = fTrSec[0]->GetLayer(rowlast)->GetX();
1277 if (!t.GetProlongation(x,y,z)) {
1278 fHClSearch->Fill(hb+5);
1281 xyz1[0] = x * TMath::Cos(t.GetAlpha()) - y * TMath::Sin(t.GetAlpha());
1282 xyz1[1] = +x * TMath::Sin(t.GetAlpha()) + y * TMath::Cos(t.GetAlpha());
1284 AliKalmanTrack::MeanMaterialBudget(xyz0,xyz1,param);
1286 radLength = param[1]; // Get mean propagation parameters
1291 sector = t.GetSector();
1292 Float_t ncl = FindClusters(sector,row0,rowlast,&t,clusters,tracklet);
1293 fHNCl->Fill(tracklet.GetN());
1295 if (tracklet.GetN() < GetTimeBinsPerPlane()/3) {
1296 fHClSearch->Fill(hb+6);
1301 // Propagate and update track
1303 for (Int_t itime = GetTimeBinsPerPlane()-1; itime >= 0; itime--) {
1305 Int_t ilayer = GetGlobalTimeBin(0, iplane,itime);
1306 expectedNumberOfClusters++;
1307 t.SetNExpected(t.GetNExpected() + 1);
1308 if (t.GetX() > 345.0) {
1309 t.SetNExpectedLast(t.GetNExpectedLast() + 1);
1311 AliTRDpropagationLayer &timeBin = *(fTrSec[sector]->GetLayer(ilayer));
1312 AliTRDcluster *cl = 0;
1314 Double_t maxChi2 = fgkMaxChi2;
1319 if (clusters[ilayer] > 0) {
1320 index = clusters[ilayer];
1321 cl = (AliTRDcluster *)GetCluster(index);
1322 //Double_t h01 = GetTiltFactor(cl); // I.B's fix
1323 //maxChi2=t.GetPredictedChi2(cl,h01); //
1328 //if (cl->GetNPads() < 5)
1329 Double_t dxsample = timeBin.GetdX();
1330 t.SetSampledEdx(TMath::Abs(cl->GetQ()/dxsample));
1331 Double_t h01 = GetTiltFactor(cl);
1332 Int_t det = cl->GetDetector();
1333 Int_t plane = fGeom->GetPlane(det);
1334 if (t.GetX() > 345.0) {
1335 t.SetNLast(t.GetNLast() + 1);
1336 t.SetChi2Last(t.GetChi2Last() + maxChi2);
1338 Double_t xcluster = cl->GetX();
1339 t.PropagateTo(xcluster,radLength,rho);
1340 maxChi2 = t.GetPredictedChi2(cl,h01);
1343 if (!t.UpdateMI(cl,maxChi2,index,h01,plane)) {
1344 if (!t.Update(cl,maxChi2,index,h01)) {
1349 if (calibra->GetMITracking()) {
1350 calibra->UpdateHistograms(cl,&t);
1353 // Reset material budget if 2 consecutive gold
1355 if ((t.GetTracklets(plane).GetN() + t.GetTracklets(plane-1).GetN()) > 20) {
1366 ratio0 = ncl / Float_t(fTimeBinsPerPlane);
1367 Float_t ratio1 = Float_t(t.GetNumberOfClusters()+1) / Float_t(t.GetNExpected()+1);
1368 if ((tracklet.GetChi2() < 18.0) &&
1371 (ratio0+ratio1 > 1.5) &&
1372 (t.GetNCross() == 0) &&
1373 (TMath::Abs(t.GetSnp()) < 0.85) &&
1374 (t.GetNumberOfClusters() > 20)){
1375 //if (ratio0 > 0.8) {
1376 t.MakeBackupTrack(); // Make backup of the track until is gold
1381 return expectedNumberOfClusters;
1384 //_____________________________________________________________________________
1385 Int_t AliTRDtracker::PropagateToX(AliTRDtrack &t, Double_t xToGo, Double_t maxStep)
1388 // Starting from current radial position of track <t> this function
1389 // extrapolates the track up to radial position <xToGo>.
1390 // Returns 1 if track reaches the plane, and 0 otherwise
1393 const Double_t kEpsilon = 0.00001;
1394 //Double_t tanmax = TMath::Tan(0.5*AliTRDgeometry::GetAlpha());
1395 Double_t xpos = t.GetX();
1396 Double_t dir = (xpos<xToGo) ? 1.0 : -1.0;
1398 while (((xToGo-xpos)*dir) > kEpsilon) {
1400 Double_t step = dir * TMath::Min(TMath::Abs(xToGo-xpos),maxStep);
1408 // Starting global position
1412 if (!t.GetProlongation(x,y,z)) {
1413 return 0; // No prolongation
1416 xyz1[0] = x * TMath::Cos(t.GetAlpha()) - y * TMath::Sin(t.GetAlpha());
1417 xyz1[1] = +x * TMath::Sin(t.GetAlpha()) + y * TMath::Cos(t.GetAlpha());
1420 AliKalmanTrack::MeanMaterialBudget(xyz0,xyz1,param);
1421 if (!t.PropagateTo(x,param[1],param[0])) {
1433 //_____________________________________________________________________________
1434 Int_t AliTRDtracker::LoadClusters(TTree *cTree)
1437 // Fills clusters into TRD tracking_sectors
1438 // Note that the numbering scheme for the TRD tracking_sectors
1439 // differs from that of TRD sectors
1442 if (ReadClusters(fClusters,cTree)) {
1443 AliError("Problem with reading the clusters !");
1446 Int_t ncl = fClusters->GetEntriesFast();
1448 AliInfo(Form("Sorting %d clusters",ncl));
1451 for (Int_t ichamber = 0; ichamber < 5; ichamber++) {
1452 for (Int_t isector = 0; isector < 18; isector++) {
1453 fHoles[ichamber][isector] = kTRUE;
1459 AliTRDcluster *c = (AliTRDcluster *) fClusters->UncheckedAt(ncl);
1460 Int_t detector = c->GetDetector();
1461 Int_t localTimeBin = c->GetLocalTimeBin();
1462 Int_t sector = fGeom->GetSector(detector);
1463 Int_t plane = fGeom->GetPlane(detector);
1464 Int_t trackingSector = sector;
1466 //if (c->GetLabel(0) > 0) {
1467 if (c->GetQ() > 10) {
1468 Int_t chamber = fGeom->GetChamber(detector);
1469 fHoles[chamber][trackingSector] = kFALSE;
1472 Int_t gtb = fTrSec[trackingSector]->CookTimeBinIndex(plane,localTimeBin);
1476 Int_t layer = fTrSec[trackingSector]->GetLayerNumber(gtb);
1480 // Apply pos correction
1482 fHXCl->Fill(c->GetX());
1484 fTrSec[trackingSector]->GetLayer(layer)->SetX(c->GetX());
1485 fTrSec[trackingSector]->GetLayer(layer)->InsertCluster(c,index);
1492 //_____________________________________________________________________________
1493 void AliTRDtracker::UnloadClusters()
1496 // Clears the arrays of clusters and tracks. Resets sectors and timebins
1502 nentr = fClusters->GetEntriesFast();
1503 for (i = 0; i < nentr; i++) {
1504 delete fClusters->RemoveAt(i);
1508 nentr = fSeeds->GetEntriesFast();
1509 for (i = 0; i < nentr; i++) {
1510 delete fSeeds->RemoveAt(i);
1513 nentr = fTracks->GetEntriesFast();
1514 for (i = 0; i < nentr; i++) {
1515 delete fTracks->RemoveAt(i);
1518 Int_t nsec = AliTRDgeometry::kNsect;
1519 for (i = 0; i < nsec; i++) {
1520 for(Int_t pl = 0; pl < fTrSec[i]->GetNumberOfLayers(); pl++) {
1521 fTrSec[i]->GetLayer(pl)->Clear();
1527 //_____________________________________________________________________________
1528 void AliTRDtracker::MakeSeedsMI(Int_t /*inner*/, Int_t /*outer*/, AliESD *esd)
1531 // Creates seeds using clusters between position inner plane and outer plane
1534 const Double_t kMaxTheta = 1.0;
1535 const Double_t kMaxPhi = 2.0;
1537 const Double_t kRoad0y = 6.0; // Road for middle cluster
1538 const Double_t kRoad0z = 8.5; // Road for middle cluster
1540 const Double_t kRoad1y = 2.0; // Road in y for seeded cluster
1541 const Double_t kRoad1z = 20.0; // Road in z for seeded cluster
1543 const Double_t kRoad2y = 3.0; // Road in y for extrapolated cluster
1544 const Double_t kRoad2z = 20.0; // Road in z for extrapolated cluster
1545 const Int_t kMaxSeed = 3000;
1547 Int_t maxSec = AliTRDgeometry::kNsect;
1549 // Linear fitters in planes
1550 TLinearFitter fitterTC(2,"hyp2"); // Fitting with tilting pads - kz fixed - kz= Z/x, + vertex const
1551 TLinearFitter fitterT2(4,"hyp4"); // Fitting with tilting pads - kz not fixed
1552 fitterTC.StoreData(kTRUE);
1553 fitterT2.StoreData(kTRUE);
1554 AliRieman rieman(1000); // Rieman fitter
1555 AliRieman rieman2(1000); // Rieman fitter
1557 // Find the maximal and minimal layer for the planes
1559 AliTRDpropagationLayer *reflayers[6];
1560 for (Int_t i = 0; i < 6; i++) {
1561 layers[i][0] = 10000;
1564 for (Int_t ns = 0; ns < maxSec; ns++) {
1565 for (Int_t ilayer = 0; ilayer < fTrSec[ns]->GetNumberOfLayers(); ilayer++) {
1566 AliTRDpropagationLayer &layer = *(fTrSec[ns]->GetLayer(ilayer));
1570 Int_t det = layer[0]->GetDetector();
1571 Int_t plane = fGeom->GetPlane(det);
1572 if (ilayer < layers[plane][0]) {
1573 layers[plane][0] = ilayer;
1575 if (ilayer > layers[plane][1]) {
1576 layers[plane][1] = ilayer;
1581 AliTRDpadPlane *padPlane = AliTRDCommonParam::Instance()->GetPadPlane(0,0);
1582 Double_t h01 = TMath::Tan(-TMath::Pi() / 180.0 * padPlane->GetTiltingAngle());
1583 Double_t hL[6]; // Tilting angle
1584 Double_t xcl[6]; // X - position of reference cluster
1585 Double_t ycl[6]; // Y - position of reference cluster
1586 Double_t zcl[6]; // Z - position of reference cluster
1588 AliTRDcluster *cl[6] = { 0, 0, 0, 0, 0, 0 }; // Seeding clusters
1589 Float_t padlength[6] = { 10.0, 10.0, 10.0, 10.0, 10.0, 10.0 }; // Current pad-length
1591 Double_t chi2R = 0.0;
1592 Double_t chi2Z = 0.0;
1593 Double_t chi2RF = 0.0;
1594 Double_t chi2ZF = 0.0;
1596 Int_t nclusters; // Total number of clusters
1597 for (Int_t i = 0; i < 6; i++) {
1605 AliTRDseed *pseed = new AliTRDseed[kMaxSeed*6];
1606 AliTRDseed *seed[kMaxSeed];
1607 for (Int_t iseed = 0; iseed < kMaxSeed; iseed++) {
1608 seed[iseed]= &pseed[iseed*6];
1610 AliTRDseed *cseed = seed[0];
1612 Double_t seedquality[kMaxSeed];
1613 Double_t seedquality2[kMaxSeed];
1614 Double_t seedparams[kMaxSeed][7];
1615 Int_t seedlayer[kMaxSeed];
1616 Int_t registered = 0;
1617 Int_t sort[kMaxSeed];
1622 for (Int_t ns = 0; ns < maxSec; ns++) { // Loop over sectors
1623 //for (Int_t ns = 0; ns < 5; ns++) { // Loop over sectors
1625 registered = 0; // Reset registerd seed counter
1626 cseed = seed[registered];
1629 for (Int_t sLayer = 2; sLayer >= 0; sLayer--) {
1630 //for (Int_t dseed = 5; dseed < 15; dseed += 3) {
1633 Int_t dseed = 5 + Int_t(iter) * 3;
1635 // Initialize seeding layers
1636 for (Int_t ilayer = 0; ilayer < 6; ilayer++) {
1637 reflayers[ilayer] = fTrSec[ns]->GetLayer(layers[ilayer][1]-dseed);
1638 xcl[ilayer] = reflayers[ilayer]->GetX();
1641 Double_t xref = (xcl[sLayer+1] + xcl[sLayer+2]) * 0.5;
1642 AliTRDpropagationLayer &layer0 = *reflayers[sLayer+0];
1643 AliTRDpropagationLayer &layer1 = *reflayers[sLayer+1];
1644 AliTRDpropagationLayer &layer2 = *reflayers[sLayer+2];
1645 AliTRDpropagationLayer &layer3 = *reflayers[sLayer+3];
1647 Int_t maxn3 = layer3;
1648 for (Int_t icl3 = 0; icl3 < maxn3; icl3++) {
1650 AliTRDcluster *cl3 = layer3[icl3];
1654 padlength[sLayer+3] = TMath::Sqrt(cl3->GetSigmaZ2() * 12.0);
1655 ycl[sLayer+3] = cl3->GetY();
1656 zcl[sLayer+3] = cl3->GetZ();
1657 Float_t yymin0 = ycl[sLayer+3] - 1.0 - kMaxPhi * (xcl[sLayer+3]-xcl[sLayer+0]);
1658 Float_t yymax0 = ycl[sLayer+3] + 1.0 + kMaxPhi * (xcl[sLayer+3]-xcl[sLayer+0]);
1659 Int_t maxn0 = layer0;
1661 for (Int_t icl0 = layer0.Find(yymin0); icl0 < maxn0; icl0++) {
1663 AliTRDcluster *cl0 = layer0[icl0];
1667 if (cl3->IsUsed() && cl0->IsUsed()) {
1670 ycl[sLayer+0] = cl0->GetY();
1671 zcl[sLayer+0] = cl0->GetZ();
1672 if (ycl[sLayer+0] > yymax0) {
1675 Double_t tanphi = (ycl[sLayer+3]-ycl[sLayer+0]) / (xcl[sLayer+3]-xcl[sLayer+0]);
1676 if (TMath::Abs(tanphi) > kMaxPhi) {
1679 Double_t tantheta = (zcl[sLayer+3]-zcl[sLayer+0]) / (xcl[sLayer+3]-xcl[sLayer+0]);
1680 if (TMath::Abs(tantheta) > kMaxTheta) {
1683 padlength[sLayer+0] = TMath::Sqrt(cl0->GetSigmaZ2() * 12.0);
1685 // Expected position in 1 layer
1686 Double_t y1exp = ycl[sLayer+0] + (tanphi) * (xcl[sLayer+1]-xcl[sLayer+0]);
1687 Double_t z1exp = zcl[sLayer+0] + (tantheta) * (xcl[sLayer+1]-xcl[sLayer+0]);
1688 Float_t yymin1 = y1exp - kRoad0y - tanphi;
1689 Float_t yymax1 = y1exp + kRoad0y + tanphi;
1690 Int_t maxn1 = layer1;
1692 for (Int_t icl1 = layer1.Find(yymin1); icl1 < maxn1; icl1++) {
1694 AliTRDcluster *cl1 = layer1[icl1];
1699 if (cl3->IsUsed()) nusedCl++;
1700 if (cl0->IsUsed()) nusedCl++;
1701 if (cl1->IsUsed()) nusedCl++;
1705 ycl[sLayer+1] = cl1->GetY();
1706 zcl[sLayer+1] = cl1->GetZ();
1707 if (ycl[sLayer+1] > yymax1) {
1710 if (TMath::Abs(ycl[sLayer+1]-y1exp) > kRoad0y+tanphi) {
1713 if (TMath::Abs(zcl[sLayer+1]-z1exp) > kRoad0z) {
1716 padlength[sLayer+1] = TMath::Sqrt(cl1->GetSigmaZ2() * 12.0);
1718 Double_t y2exp = ycl[sLayer+0]+(tanphi) * (xcl[sLayer+2]-xcl[sLayer+0]) + (ycl[sLayer+1]-y1exp);
1719 Double_t z2exp = zcl[sLayer+0]+(tantheta) * (xcl[sLayer+2]-xcl[sLayer+0]);
1720 Int_t index2 = layer2.FindNearestCluster(y2exp,z2exp,kRoad1y,kRoad1z);
1724 AliTRDcluster *cl2 = (AliTRDcluster *) GetCluster(index2);
1725 padlength[sLayer+2] = TMath::Sqrt(cl2->GetSigmaZ2() * 12.0);
1726 ycl[sLayer+2] = cl2->GetY();
1727 zcl[sLayer+2] = cl2->GetZ();
1728 if (TMath::Abs(cl2->GetZ()-z2exp) > kRoad0z) {
1733 rieman.AddPoint(xcl[sLayer+0],ycl[sLayer+0],zcl[sLayer+0],1,10);
1734 rieman.AddPoint(xcl[sLayer+1],ycl[sLayer+1],zcl[sLayer+1],1,10);
1735 rieman.AddPoint(xcl[sLayer+3],ycl[sLayer+3],zcl[sLayer+3],1,10);
1736 rieman.AddPoint(xcl[sLayer+2],ycl[sLayer+2],zcl[sLayer+2],1,10);
1740 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
1741 cseed[iLayer].Reset();
1746 for (Int_t iLayer = 0; iLayer < 4; iLayer++) {
1747 cseed[sLayer+iLayer].SetZref(0,rieman.GetZat(xcl[sLayer+iLayer]));
1748 chi2Z += (cseed[sLayer+iLayer].GetZref(0)- zcl[sLayer+iLayer])
1749 * (cseed[sLayer+iLayer].GetZref(0)- zcl[sLayer+iLayer]);
1750 cseed[sLayer+iLayer].SetZref(1,rieman.GetDZat(xcl[sLayer+iLayer]));
1751 cseed[sLayer+iLayer].SetYref(0,rieman.GetYat(xcl[sLayer+iLayer]));
1752 chi2R += (cseed[sLayer+iLayer].GetYref(0)- ycl[sLayer+iLayer])
1753 * (cseed[sLayer+iLayer].GetYref(0)- ycl[sLayer+iLayer]);
1754 cseed[sLayer+iLayer].SetYref(1,rieman.GetDYat(xcl[sLayer+iLayer]));
1756 if (TMath::Sqrt(chi2R) > 1.0/iter) {
1759 if (TMath::Sqrt(chi2Z) > 7.0/iter) {
1763 Float_t minmax[2] = { -100.0, 100.0 };
1764 for (Int_t iLayer = 0; iLayer < 4; iLayer++) {
1765 Float_t max = zcl[sLayer+iLayer]+padlength[sLayer+iLayer] * 0.5
1766 + 1.0 - cseed[sLayer+iLayer].GetZref(0);
1767 if (max < minmax[1]) {
1770 Float_t min = zcl[sLayer+iLayer]-padlength[sLayer+iLayer] * 0.5
1771 - 1.0 - cseed[sLayer+iLayer].GetZref(0);
1772 if (min > minmax[0]) {
1777 Bool_t isFake = kFALSE;
1778 if (cl0->GetLabel(0) != cl3->GetLabel(0)) {
1781 if (cl1->GetLabel(0) != cl3->GetLabel(0)) {
1784 if (cl2->GetLabel(0) != cl3->GetLabel(0)) {
1788 if (AliTRDReconstructor::StreamLevel() > 0) {
1789 if ((!isFake) || ((icl3%10) == 0)) { // Debugging print
1790 TTreeSRedirector &cstream = *fDebugStreamer;
1792 << "isFake=" << isFake
1798 << "X0=" << xcl[sLayer+0]
1799 << "X1=" << xcl[sLayer+1]
1800 << "X2=" << xcl[sLayer+2]
1801 << "X3=" << xcl[sLayer+3]
1802 << "Y2exp=" << y2exp
1803 << "Z2exp=" << z2exp
1804 << "Chi2R=" << chi2R
1805 << "Chi2Z=" << chi2Z
1806 << "Seed0.=" << &cseed[sLayer+0]
1807 << "Seed1.=" << &cseed[sLayer+1]
1808 << "Seed2.=" << &cseed[sLayer+2]
1809 << "Seed3.=" << &cseed[sLayer+3]
1810 << "Zmin=" << minmax[0]
1811 << "Zmax=" << minmax[1]
1816 ////////////////////////////////////////////////////////////////////////////////////
1820 ////////////////////////////////////////////////////////////////////////////////////
1826 Bool_t isOK = kTRUE;
1828 for (Int_t jLayer = 0; jLayer < 4; jLayer++) {
1830 cseed[sLayer+jLayer].SetTilt(hL[sLayer+jLayer]);
1831 cseed[sLayer+jLayer].SetPadLength(padlength[sLayer+jLayer]);
1832 cseed[sLayer+jLayer].SetX0(xcl[sLayer+jLayer]);
1834 for (Int_t iter = 0; iter < 2; iter++) {
1837 // In iteration 0 we try only one pad-row
1838 // If quality not sufficient we try 2 pad-rows - about 5% of tracks cross 2 pad-rows
1840 AliTRDseed tseed = cseed[sLayer+jLayer];
1841 Float_t roadz = padlength[sLayer+jLayer] * 0.5;
1843 roadz = padlength[sLayer+jLayer];
1846 Float_t quality = 10000.0;
1848 for (Int_t iTime = 2; iTime < 20; iTime++) {
1850 AliTRDpropagationLayer &layer = *(fTrSec[ns]->GetLayer(layers[sLayer+jLayer][1]-iTime));
1851 Double_t dxlayer = layer.GetX() - xcl[sLayer+jLayer];
1852 Double_t zexp = cl[sLayer+jLayer]->GetZ();
1855 // Try 2 pad-rows in second iteration
1856 zexp = tseed.GetZref(0) + tseed.GetZref(1) * dxlayer;
1857 if (zexp > cl[sLayer+jLayer]->GetZ()) {
1858 zexp = cl[sLayer+jLayer]->GetZ() + padlength[sLayer+jLayer]*0.5;
1860 if (zexp < cl[sLayer+jLayer]->GetZ()) {
1861 zexp = cl[sLayer+jLayer]->GetZ() - padlength[sLayer+jLayer]*0.5;
1865 Double_t yexp = tseed.GetYref(0) + tseed.GetYref(1) * dxlayer;
1866 Int_t index = layer.FindNearestCluster(yexp,zexp,kRoad1y,roadz);
1870 AliTRDcluster *cl = (AliTRDcluster *) GetCluster(index);
1872 tseed.SetIndexes(iTime,index);
1873 tseed.SetClusters(iTime,cl); // Register cluster
1874 tseed.SetX(iTime,dxlayer); // Register cluster
1875 tseed.SetY(iTime,cl->GetY()); // Register cluster
1876 tseed.SetZ(iTime,cl->GetZ()); // Register cluster
1882 // Count the number of clusters and distortions into quality
1883 Float_t dangle = tseed.GetYfit(1) - tseed.GetYref(1);
1884 Float_t tquality = (18.0 - tseed.GetN2()) / 2.0 + TMath::Abs(dangle) / 0.1
1885 + TMath::Abs(tseed.GetYfit(0) - tseed.GetYref(0)) / 0.2
1886 + 2.0 * TMath::Abs(tseed.GetMeanz() - tseed.GetZref(0)) / padlength[jLayer];
1887 if ((iter == 0) && tseed.IsOK()) {
1888 cseed[sLayer+jLayer] = tseed;
1894 if (tseed.IsOK() && (tquality < quality)) {
1895 cseed[sLayer+jLayer] = tseed;
1900 if (!cseed[sLayer+jLayer].IsOK()) {
1905 cseed[sLayer+jLayer].CookLabels();
1906 cseed[sLayer+jLayer].UpdateUsed();
1907 nusedCl += cseed[sLayer+jLayer].GetNUsed();
1919 for (Int_t iLayer = 0; iLayer < 4; iLayer++) {
1920 if (cseed[sLayer+iLayer].IsOK()) {
1921 nclusters += cseed[sLayer+iLayer].GetN2();
1927 for (Int_t iLayer = 0; iLayer < 4; iLayer++) {
1928 rieman.AddPoint(xcl[sLayer+iLayer]
1929 ,cseed[sLayer+iLayer].GetYfitR(0)
1930 ,cseed[sLayer+iLayer].GetZProb()
1939 for (Int_t iLayer = 0; iLayer < 4; iLayer++) {
1940 cseed[sLayer+iLayer].SetYref(0,rieman.GetYat(xcl[sLayer+iLayer]));
1941 chi2R += (cseed[sLayer+iLayer].GetYref(0) - cseed[sLayer+iLayer].GetYfitR(0))
1942 * (cseed[sLayer+iLayer].GetYref(0) - cseed[sLayer+iLayer].GetYfitR(0));
1943 cseed[sLayer+iLayer].SetYref(1,rieman.GetDYat(xcl[sLayer+iLayer]));
1944 cseed[sLayer+iLayer].SetZref(0,rieman.GetZat(xcl[sLayer+iLayer]));
1945 chi2Z += (cseed[sLayer+iLayer].GetZref(0) - cseed[sLayer+iLayer].GetMeanz())
1946 * (cseed[sLayer+iLayer].GetZref(0) - cseed[sLayer+iLayer].GetMeanz());
1947 cseed[sLayer+iLayer].SetZref(1,rieman.GetDZat(xcl[sLayer+iLayer]));
1949 Double_t curv = rieman.GetC();
1954 Double_t sumda = TMath::Abs(cseed[sLayer+0].GetYfitR(1) - cseed[sLayer+0].GetYref(1))
1955 + TMath::Abs(cseed[sLayer+1].GetYfitR(1) - cseed[sLayer+1].GetYref(1))
1956 + TMath::Abs(cseed[sLayer+2].GetYfitR(1) - cseed[sLayer+2].GetYref(1))
1957 + TMath::Abs(cseed[sLayer+3].GetYfitR(1) - cseed[sLayer+3].GetYref(1));
1958 Double_t likea = TMath::Exp(-sumda*10.6);
1959 Double_t likechi2 = 0.0000000001;
1961 likechi2 += TMath::Exp(-TMath::Sqrt(chi2R) * 7.73);
1963 Double_t likechi2z = TMath::Exp(-chi2Z * 0.088) / TMath::Exp(-chi2Z * 0.019);
1964 Double_t likeN = TMath::Exp(-(72 - nclusters) * 0.19);
1965 Double_t like = likea * likechi2 * likechi2z * likeN;
1966 Double_t likePrimY = TMath::Exp(-TMath::Abs(cseed[sLayer+0].GetYref(1) - 130.0*curv) * 1.9);
1967 Double_t likePrimZ = TMath::Exp(-TMath::Abs(cseed[sLayer+0].GetZref(1)
1968 - cseed[sLayer+0].GetZref(0) / xcl[sLayer+0]) * 5.9);
1969 Double_t likePrim = TMath::Max(likePrimY*likePrimZ,0.0005);
1971 seedquality[registered] = like;
1972 seedlayer[registered] = sLayer;
1973 if (TMath::Log(0.000000000000001 + like) < -15) {
1976 AliTRDseed seedb[6];
1977 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
1978 seedb[iLayer] = cseed[iLayer];
1981 ////////////////////////////////////////////////////////////////////////////////////
1983 // Full track fit part
1985 ////////////////////////////////////////////////////////////////////////////////////
1992 // Add new layers - avoid long extrapolation
1994 Int_t tLayer[2] = { 0, 0 };
2008 for (Int_t iLayer = 0; iLayer < 2; iLayer++) {
2009 Int_t jLayer = tLayer[iLayer]; // Set tracking layer
2010 cseed[jLayer].Reset();
2011 cseed[jLayer].SetTilt(hL[jLayer]);
2012 cseed[jLayer].SetPadLength(padlength[jLayer]);
2013 cseed[jLayer].SetX0(xcl[jLayer]);
2014 // Get pad length and rough cluster
2015 Int_t indexdummy = reflayers[jLayer]->FindNearestCluster(cseed[jLayer].GetYref(0)
2016 ,cseed[jLayer].GetZref(0)
2019 if (indexdummy <= 0) {
2022 AliTRDcluster *cldummy = (AliTRDcluster *) GetCluster(indexdummy);
2023 padlength[jLayer] = TMath::Sqrt(cldummy->GetSigmaZ2() * 12.0);
2025 AliTRDseed::FitRiemanTilt(cseed,kTRUE);
2027 for (Int_t iLayer = 0; iLayer < 2; iLayer++) {
2029 Int_t jLayer = tLayer[iLayer]; // set tracking layer
2030 if ((jLayer == 0) && !(cseed[1].IsOK())) {
2031 continue; // break not allowed
2033 if ((jLayer == 5) && !(cseed[4].IsOK())) {
2034 continue; // break not allowed
2036 Float_t zexp = cseed[jLayer].GetZref(0);
2037 Double_t zroad = padlength[jLayer] * 0.5 + 1.0;
2039 for (Int_t iter = 0; iter < 2; iter++) {
2041 AliTRDseed tseed = cseed[jLayer];
2042 Float_t quality = 10000.0;
2044 for (Int_t iTime = 2; iTime < 20; iTime++) {
2045 AliTRDpropagationLayer &layer = *(fTrSec[ns]->GetLayer(layers[jLayer][1]-iTime));
2046 Double_t dxlayer = layer.GetX()-xcl[jLayer];
2047 Double_t yexp = tseed.GetYref(0) + tseed.GetYref(1) * dxlayer;
2048 Float_t yroad = kRoad1y;
2049 Int_t index = layer.FindNearestCluster(yexp,zexp,yroad,zroad);
2053 AliTRDcluster *cl = (AliTRDcluster *) GetCluster(index);
2054 tseed.SetIndexes(iTime,index);
2055 tseed.SetClusters(iTime,cl); // Register cluster
2056 tseed.SetX(iTime,dxlayer); // Register cluster
2057 tseed.SetY(iTime,cl->GetY()); // Register cluster
2058 tseed.SetZ(iTime,cl->GetZ()); // Register cluster
2063 Float_t dangle = tseed.GetYfit(1) - tseed.GetYref(1);
2064 Float_t tquality = (18.0 - tseed.GetN2())/2.0 + TMath::Abs(dangle) / 0.1
2065 + TMath::Abs(tseed.GetYfit(0) - tseed.GetYref(0)) / 0.2
2066 + 2.0 * TMath::Abs(tseed.GetMeanz() - tseed.GetZref(0)) / padlength[jLayer];
2067 if (tquality < quality) {
2068 cseed[jLayer] = tseed;
2077 if ( cseed[jLayer].IsOK()) {
2078 cseed[jLayer].CookLabels();
2079 cseed[jLayer].UpdateUsed();
2080 nusedf += cseed[jLayer].GetNUsed();
2081 AliTRDseed::FitRiemanTilt(cseed,kTRUE);
2087 AliTRDseed bseed[6];
2088 for (Int_t jLayer = 0; jLayer < 6; jLayer++) {
2089 bseed[jLayer] = cseed[jLayer];
2091 Float_t lastquality = 10000.0;
2092 Float_t lastchi2 = 10000.0;
2093 Float_t chi2 = 1000.0;
2095 for (Int_t iter = 0; iter < 4; iter++) {
2097 // Sort tracklets according "quality", try to "improve" 4 worst
2098 Float_t sumquality = 0.0;
2099 Float_t squality[6];
2100 Int_t sortindexes[6];
2102 for (Int_t jLayer = 0; jLayer < 6; jLayer++) {
2103 if (bseed[jLayer].IsOK()) {
2104 AliTRDseed &tseed = bseed[jLayer];
2105 Double_t zcor = tseed.GetTilt() * (tseed.GetZProb() - tseed.GetZref(0));
2106 Float_t dangle = tseed.GetYfit(1) - tseed.GetYref(1);
2107 Float_t tquality = (18.0 - tseed.GetN2()) / 2.0 + TMath::Abs(dangle) / 0.1
2108 + TMath::Abs(tseed.GetYfit(0) - (tseed.GetYref(0) - zcor)) / 0.2
2109 + 2.0 * TMath::Abs(tseed.GetMeanz() - tseed.GetZref(0)) / padlength[jLayer];
2110 squality[jLayer] = tquality;
2113 squality[jLayer] = -1.0;
2115 sumquality +=squality[jLayer];
2118 if ((sumquality >= lastquality) ||
2119 (chi2 > lastchi2)) {
2122 lastquality = sumquality;
2125 for (Int_t jLayer = 0; jLayer < 6; jLayer++) {
2126 cseed[jLayer] = bseed[jLayer];
2129 TMath::Sort(6,squality,sortindexes,kFALSE);
2131 for (Int_t jLayer = 5; jLayer > 1; jLayer--) {
2133 Int_t bLayer = sortindexes[jLayer];
2134 AliTRDseed tseed = bseed[bLayer];
2136 for (Int_t iTime = 2; iTime < 20; iTime++) {
2138 AliTRDpropagationLayer &layer = *(fTrSec[ns]->GetLayer(layers[bLayer][1]-iTime));
2139 Double_t dxlayer = layer.GetX() - xcl[bLayer];
2140 Double_t zexp = tseed.GetZref(0);
2141 Double_t zcor = tseed.GetTilt() * (tseed.GetZProb() - tseed.GetZref(0));
2142 Float_t roadz = padlength[bLayer] + 1;
2143 if (TMath::Abs(tseed.GetZProb() - zexp) > 0.5*padlength[bLayer]) {
2144 roadz = padlength[bLayer] * 0.5;
2146 if (tseed.GetZfit(1)*tseed.GetZref(1) < 0.0) {
2147 roadz = padlength[bLayer] * 0.5;
2149 if (TMath::Abs(tseed.GetZProb() - zexp) < 0.1*padlength[bLayer]) {
2150 zexp = tseed.GetZProb();
2151 roadz = padlength[bLayer] * 0.5;
2154 Double_t yexp = tseed.GetYref(0) + tseed.GetYref(1) * dxlayer - zcor;
2155 Int_t index = layer.FindNearestCluster(yexp,zexp,kRoad1y,roadz);
2159 AliTRDcluster *cl = (AliTRDcluster *) GetCluster(index);
2161 tseed.SetIndexes(iTime,index);
2162 tseed.SetClusters(iTime,cl); // Register cluster
2163 tseed.SetX(iTime,dxlayer); // Register cluster
2164 tseed.SetY(iTime,cl->GetY()); // Register cluster
2165 tseed.SetZ(iTime,cl->GetZ()); // Register cluster
2171 Float_t dangle = tseed.GetYfit(1) - tseed.GetYref(1);
2172 Double_t zcor = tseed.GetTilt() * (tseed.GetZProb() - tseed.GetZref(0));
2173 Float_t tquality = (18.0 - tseed.GetN2()) / 2.0
2174 + TMath::Abs(dangle) / 0.1
2175 + TMath::Abs(tseed.GetYfit(0) - (tseed.GetYref(0) - zcor)) / 0.2
2176 + 2.0 * TMath::Abs(tseed.GetMeanz() - tseed.GetZref(0)) / padlength[jLayer];
2177 if (tquality<squality[bLayer]) {
2178 bseed[bLayer] = tseed;
2184 chi2 = AliTRDseed::FitRiemanTilt(bseed,kTRUE);
2191 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2192 if (TMath::Abs(cseed[iLayer].GetYref(0) / cseed[iLayer].GetX0()) < 0.15) {
2195 if (cseed[iLayer].IsOK()) {
2196 nclusters += cseed[iLayer].GetN2();
2204 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2205 if (cseed[iLayer].IsOK()) {
2206 rieman.AddPoint(xcl[iLayer]
2207 ,cseed[iLayer].GetYfitR(0)
2208 ,cseed[iLayer].GetZProb()
2217 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2218 if (cseed[iLayer].IsOK()) {
2219 cseed[iLayer].SetYref(0,rieman.GetYat(xcl[iLayer]));
2220 chi2RF += (cseed[iLayer].GetYref(0) - cseed[iLayer].GetYfitR(0))
2221 * (cseed[iLayer].GetYref(0) - cseed[iLayer].GetYfitR(0));
2222 cseed[iLayer].SetYref(1,rieman.GetDYat(xcl[iLayer]));
2223 cseed[iLayer].SetZref(0,rieman.GetZat(xcl[iLayer]));
2224 chi2ZF += (cseed[iLayer].GetZref(0) - cseed[iLayer].GetMeanz())
2225 * (cseed[iLayer].GetZref(0) - cseed[iLayer].GetMeanz());
2226 cseed[iLayer].SetZref(1,rieman.GetDZat(xcl[iLayer]));
2229 chi2RF /= TMath::Max((nlayers - 3.0),1.0);
2230 chi2ZF /= TMath::Max((nlayers - 3.0),1.0);
2231 curv = rieman.GetC();
2233 Double_t xref2 = (xcl[2] + xcl[3]) * 0.5; // Middle of the chamber
2234 Double_t dzmf = rieman.GetDZat(xref2);
2235 Double_t zmf = rieman.GetZat(xref2);
2241 fitterTC.ClearPoints();
2242 fitterT2.ClearPoints();
2245 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2247 if (!cseed[iLayer].IsOK()) {
2251 for (Int_t itime = 0; itime < 25; itime++) {
2253 if (!cseed[iLayer].IsUsable(itime)) {
2256 // X relative to the middle chamber
2257 Double_t x = cseed[iLayer].GetX(itime) + cseed[iLayer].GetX0() - xref2;
2258 Double_t y = cseed[iLayer].GetY(itime);
2259 Double_t z = cseed[iLayer].GetZ(itime);
2260 // ExB correction to the correction
2264 Double_t x2 = cseed[iLayer].GetX(itime) + cseed[iLayer].GetX0();
2265 Double_t t = 1.0 / (x2*x2 + y*y);
2267 uvt[0] = 2.0 * x2 * uvt[1]; // u
2268 uvt[2] = 2.0 * hL[iLayer] * uvt[1];
2269 uvt[3] = 2.0 * hL[iLayer] * x * uvt[1];
2270 uvt[4] = 2.0 * (y + hL[iLayer]*z) * uvt[1];
2271 Double_t error = 2.0 * 0.2 * uvt[1];
2272 fitterT2.AddPoint(uvt,uvt[4],error);
2275 // Constrained rieman
2277 z = cseed[iLayer].GetZ(itime);
2278 uvt[0] = 2.0 * x2 * t; // u
2279 uvt[1] = 2.0 * hL[iLayer] * x2 * uvt[1];
2280 uvt[2] = 2.0 * (y + hL[iLayer] * (z - GetZ())) * t;
2281 fitterTC.AddPoint(uvt,uvt[2],error);
2282 rieman2.AddPoint(x2,y,z,1,10);
2292 Double_t rpolz0 = fitterT2.GetParameter(3);
2293 Double_t rpolz1 = fitterT2.GetParameter(4);
2296 // Linear fitter - not possible to make boundaries
2297 // Do not accept non possible z and dzdx combinations
2299 Bool_t acceptablez = kTRUE;
2300 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2301 if (cseed[iLayer].IsOK()) {
2302 Double_t zT2 = rpolz0 + rpolz1 * (xcl[iLayer] - xref2);
2303 if (TMath::Abs(cseed[iLayer].GetZProb() - zT2) > padlength[iLayer] * 0.5 + 1.0) {
2304 acceptablez = kFALSE;
2309 fitterT2.FixParameter(3,zmf);
2310 fitterT2.FixParameter(4,dzmf);
2312 fitterT2.ReleaseParameter(3);
2313 fitterT2.ReleaseParameter(4);
2314 rpolz0 = fitterT2.GetParameter(3);
2315 rpolz1 = fitterT2.GetParameter(4);
2318 Double_t chi2TR = fitterT2.GetChisquare() / Float_t(npointsT);
2319 Double_t chi2TC = fitterTC.GetChisquare() / Float_t(npointsT);
2320 Double_t polz1c = fitterTC.GetParameter(2);
2321 Double_t polz0c = polz1c * xref2;
2322 Double_t aC = fitterTC.GetParameter(0);
2323 Double_t bC = fitterTC.GetParameter(1);
2324 Double_t cC = aC / TMath::Sqrt(bC * bC + 1.0); // Curvature
2325 Double_t aR = fitterT2.GetParameter(0);
2326 Double_t bR = fitterT2.GetParameter(1);
2327 Double_t dR = fitterT2.GetParameter(2);
2328 Double_t cR = 1.0 + bR*bR - dR*aR;
2331 dca = -dR / (TMath::Sqrt(1.0 + bR*bR - dR*aR) + TMath::Sqrt(1.0 + bR*bR));
2332 cR = aR / TMath::Sqrt(cR);
2335 Double_t chi2ZT2 = 0.0;
2336 Double_t chi2ZTC = 0.0;
2337 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2338 if (cseed[iLayer].IsOK()) {
2339 Double_t zT2 = rpolz0 + rpolz1 * (xcl[iLayer] - xref2);
2340 Double_t zTC = polz0c + polz1c * (xcl[iLayer] - xref2);
2341 chi2ZT2 += TMath::Abs(cseed[iLayer].GetMeanz() - zT2);
2342 chi2ZTC += TMath::Abs(cseed[iLayer].GetMeanz() - zTC);
2345 chi2ZT2 /= TMath::Max((nlayers - 3.0),1.0);
2346 chi2ZTC /= TMath::Max((nlayers - 3.0),1.0);
2348 AliTRDseed::FitRiemanTilt(cseed,kTRUE);
2349 Float_t sumdaf = 0.0;
2350 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2351 if (cseed[iLayer].IsOK()) {
2352 sumdaf += TMath::Abs((cseed[iLayer].GetYfit(1) - cseed[iLayer].GetYref(1))
2353 / cseed[iLayer].GetSigmaY2());
2356 sumdaf /= Float_t (nlayers - 2.0);
2359 // Likelihoods for full track
2361 Double_t likezf = TMath::Exp(-chi2ZF * 0.14);
2362 Double_t likechi2C = TMath::Exp(-chi2TC * 0.677);
2363 Double_t likechi2TR = TMath::Exp(-chi2TR * 0.78);
2364 Double_t likeaf = TMath::Exp(-sumdaf * 3.23);
2365 seedquality2[registered] = likezf * likechi2TR * likeaf;
2367 // Still needed ????
2368 // Bool_t isGold = kFALSE;
2370 // if (nlayers == 6 && TMath::Log(0.000000001+seedquality2[index])<-5.) isGold =kTRUE; // gold
2371 // if (nlayers == findable && TMath::Log(0.000000001+seedquality2[index])<-4.) isGold =kTRUE; // gold
2372 // if (isGold &&nusedf<10){
2373 // for (Int_t jLayer=0;jLayer<6;jLayer++){
2374 // if ( seed[index][jLayer].IsOK()&&TMath::Abs(seed[index][jLayer].fYfit[1]-seed[index][jLayer].fYfit[1])<0.1)
2375 // seed[index][jLayer].UseClusters(); //sign gold
2380 if (!cseed[0].IsOK()) {
2382 if (!cseed[1].IsOK()) {
2386 seedparams[registered][0] = cseed[index0].GetX0();
2387 seedparams[registered][1] = cseed[index0].GetYref(0);
2388 seedparams[registered][2] = cseed[index0].GetZref(0);
2389 seedparams[registered][5] = cR;
2390 seedparams[registered][3] = cseed[index0].GetX0() * cR - TMath::Sin(TMath::ATan(cseed[0].GetYref(1)));
2391 seedparams[registered][4] = cseed[index0].GetZref(1)
2392 / TMath::Sqrt(1.0 + cseed[index0].GetYref(1) * cseed[index0].GetYref(1));
2393 seedparams[registered][6] = ns;
2398 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2399 if (!cseed[iLayer].IsOK()) {
2402 if (cseed[iLayer].GetLabels(0) >= 0) {
2403 labels[nlab] = cseed[iLayer].GetLabels(0);
2406 if (cseed[iLayer].GetLabels(1) >= 0) {
2407 labels[nlab] = cseed[iLayer].GetLabels(1);
2411 Freq(nlab,labels,outlab,kFALSE);
2412 Int_t label = outlab[0];
2413 Int_t frequency = outlab[1];
2414 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2415 cseed[iLayer].SetFreq(frequency);
2416 cseed[iLayer].SetC(cR);
2417 cseed[iLayer].SetCC(cC);
2418 cseed[iLayer].SetChi2(chi2TR);
2419 cseed[iLayer].SetChi2Z(chi2ZF);
2423 if (1 || (!isFake)) {
2424 Float_t zvertex = GetZ();
2425 TTreeSRedirector &cstream = *fDebugStreamer;
2426 if (AliTRDReconstructor::StreamLevel() > 0) {
2428 << "isFake=" << isFake
2429 << "Vertex=" << zvertex
2430 << "Rieman2.=" << &rieman2
2431 << "Rieman.=" << &rieman
2439 << "Chi2R=" << chi2R
2440 << "Chi2Z=" << chi2Z
2441 << "Chi2RF=" << chi2RF // Chi2 of trackletes on full track
2442 << "Chi2ZF=" << chi2ZF // Chi2 z on tracklets on full track
2443 << "Chi2ZT2=" << chi2ZT2 // Chi2 z on tracklets on full track - rieman tilt
2444 << "Chi2ZTC=" << chi2ZTC // Chi2 z on tracklets on full track - rieman tilt const
2445 << "Chi2TR=" << chi2TR // Chi2 without vertex constrain
2446 << "Chi2TC=" << chi2TC // Chi2 with vertex constrain
2447 << "C=" << curv // Non constrained - no tilt correction
2448 << "DR=" << dR // DR parameter - tilt correction
2449 << "DCA=" << dca // DCA - tilt correction
2450 << "CR=" << cR // Non constrained curvature - tilt correction
2451 << "CC=" << cC // Constrained curvature
2452 << "Polz0=" << polz0c
2453 << "Polz1=" << polz1c
2454 << "RPolz0=" << rpolz0
2455 << "RPolz1=" << rpolz1
2456 << "Ncl=" << nclusters
2457 << "Nlayers=" << nlayers
2458 << "NUsedS=" << nusedCl
2459 << "NUsed=" << nusedf
2460 << "Findable=" << findable
2462 << "LikePrim=" << likePrim
2463 << "Likechi2C=" << likechi2C
2464 << "Likechi2TR=" << likechi2TR
2465 << "Likezf=" << likezf
2466 << "LikeF=" << seedquality2[registered]
2467 << "S0.=" << &cseed[0]
2468 << "S1.=" << &cseed[1]
2469 << "S2.=" << &cseed[2]
2470 << "S3.=" << &cseed[3]
2471 << "S4.=" << &cseed[4]
2472 << "S5.=" << &cseed[5]
2473 << "SB0.=" << &seedb[0]
2474 << "SB1.=" << &seedb[1]
2475 << "SB2.=" << &seedb[2]
2476 << "SB3.=" << &seedb[3]
2477 << "SB4.=" << &seedb[4]
2478 << "SB5.=" << &seedb[5]
2479 << "Label=" << label
2480 << "Freq=" << frequency
2481 << "sLayer=" << sLayer
2486 if (registered<kMaxSeed - 1) {
2488 cseed = seed[registered];
2491 } // End of loop over layer 1
2493 } // End of loop over layer 0
2495 } // End of loop over layer 3
2497 } // End of loop over seeding time bins
2503 TMath::Sort(registered,seedquality2,sort,kTRUE);
2504 Bool_t signedseed[kMaxSeed];
2505 for (Int_t i = 0; i < registered; i++) {
2506 signedseed[i] = kFALSE;
2509 for (Int_t iter = 0; iter < 5; iter++) {
2511 for (Int_t iseed = 0; iseed < registered; iseed++) {
2513 Int_t index = sort[iseed];
2514 if (signedseed[index]) {
2517 Int_t labelsall[1000];
2518 Int_t nlabelsall = 0;
2519 Int_t naccepted = 0;;
2520 Int_t sLayer = seedlayer[index];
2526 for (Int_t jLayer = 0; jLayer < 6; jLayer++) {
2528 if (TMath::Abs(seed[index][jLayer].GetYref(0) / xcl[jLayer]) < 0.15) {
2531 if (seed[index][jLayer].IsOK()) {
2532 seed[index][jLayer].UpdateUsed();
2533 ncl +=seed[index][jLayer].GetN2();
2534 nused +=seed[index][jLayer].GetNUsed();
2537 for (Int_t itime = 0; itime < 25; itime++) {
2538 if (seed[index][jLayer].IsUsable(itime)) {
2540 for (Int_t ilab = 0; ilab < 3; ilab++) {
2541 Int_t tindex = seed[index][jLayer].GetClusters(itime)->GetLabel(ilab);
2543 labelsall[nlabelsall] = tindex;
2561 if (TMath::Log(0.000000001+seedquality2[index]) < -5.0) {
2567 if (nlayers < findable) {
2570 if (TMath::Log(0.000000001+seedquality2[index]) < -4.0) {
2576 if ((nlayers == findable) ||
2580 if (TMath::Log(0.000000001+seedquality2[index]) < -6.0) {
2586 if (TMath::Log(0.000000001+seedquality2[index]) < -5.0) {
2592 if (TMath::Log(0.000000001+seedquality2[index]) - nused/(nlayers-3.0) < -15.0) {
2597 signedseed[index] = kTRUE;
2602 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2603 if (seed[index][iLayer].IsOK()) {
2604 if (seed[index][iLayer].GetLabels(0) >= 0) {
2605 labels[nlab] = seed[index][iLayer].GetLabels(0);
2608 if (seed[index][iLayer].GetLabels(1) >= 0) {
2609 labels[nlab] = seed[index][iLayer].GetLabels(1);
2614 Freq(nlab,labels,outlab,kFALSE);
2615 Int_t label = outlab[0];
2616 Int_t frequency = outlab[1];
2617 Freq(nlabelsall,labelsall,outlab,kFALSE);
2618 Int_t label1 = outlab[0];
2619 Int_t label2 = outlab[2];
2620 Float_t fakeratio = (naccepted - outlab[1]) / Float_t(naccepted);
2621 Float_t ratio = Float_t(nused) / Float_t(ncl);
2623 for (Int_t jLayer = 0; jLayer < 6; jLayer++) {
2624 if ((seed[index][jLayer].IsOK()) &&
2625 (TMath::Abs(seed[index][jLayer].GetYfit(1) - seed[index][jLayer].GetYfit(1)) < 0.2)) {
2626 seed[index][jLayer].UseClusters(); // Sign gold
2631 Int_t eventNrInFile = esd->GetEventNumberInFile(); // This is most likely NOT the event number you'd like to use. It has nothing to do with the 'real' event number.
2632 TTreeSRedirector &cstream = *fDebugStreamer;
2637 AliTRDtrack *track = RegisterSeed(seed[index],seedparams[index]);
2643 AliESDtrack esdtrack;
2644 esdtrack.UpdateTrackParams(track,AliESDtrack::kTRDout);
2645 esdtrack.SetLabel(label);
2646 esd->AddTrack(&esdtrack);
2647 TTreeSRedirector &cstream = *fDebugStreamer;
2648 if (AliTRDReconstructor::StreamLevel() > 0) {
2650 << "EventNrInFile=" << eventNrInFile
2651 << "ESD.=" << &esdtrack
2653 << "trdback.=" << track
2658 if (AliTRDReconstructor::StreamLevel() > 0) {
2661 << "Track.=" << track
2662 << "Like=" << seedquality[index]
2663 << "LikeF=" << seedquality2[index]
2664 << "S0.=" << &seed[index][0]
2665 << "S1.=" << &seed[index][1]
2666 << "S2.=" << &seed[index][2]
2667 << "S3.=" << &seed[index][3]
2668 << "S4.=" << &seed[index][4]
2669 << "S5.=" << &seed[index][5]
2670 << "Label=" << label
2671 << "Label1=" << label1
2672 << "Label2=" << label2
2673 << "FakeRatio=" << fakeratio
2674 << "Freq=" << frequency
2676 << "Nlayers=" << nlayers
2677 << "Findable=" << findable
2678 << "NUsed=" << nused
2679 << "sLayer=" << sLayer
2680 << "EventNrInFile=" << eventNrInFile
2688 } // End of loop over sectors
2694 //_____________________________________________________________________________
2695 Int_t AliTRDtracker::ReadClusters(TObjArray *array, TTree *clusterTree) const
2698 // Reads AliTRDclusters (option >= 0) or AliTRDrecPoints (option < 0)
2699 // from the file. The names of the cluster tree and branches
2700 // should match the ones used in AliTRDclusterizer::WriteClusters()
2703 Int_t nsize = Int_t(clusterTree->GetTotBytes() / (sizeof(AliTRDcluster)));
2704 TObjArray *clusterArray = new TObjArray(nsize+1000);
2706 TBranch *branch = clusterTree->GetBranch("TRDcluster");
2708 AliError("Can't get the branch !");
2711 branch->SetAddress(&clusterArray);
2713 // Loop through all entries in the tree
2714 Int_t nEntries = (Int_t) clusterTree->GetEntries();
2716 AliTRDcluster *c = 0;
2717 for (Int_t iEntry = 0; iEntry < nEntries; iEntry++) {
2720 nbytes += clusterTree->GetEvent(iEntry);
2722 // Get the number of points in the detector
2723 Int_t nCluster = clusterArray->GetEntriesFast();
2725 // Loop through all TRD digits
2726 for (Int_t iCluster = 0; iCluster < nCluster; iCluster++) {
2727 c = (AliTRDcluster *) clusterArray->UncheckedAt(iCluster);
2728 AliTRDcluster *co = c;
2730 clusterArray->RemoveAt(iCluster);
2735 delete clusterArray;
2741 //_____________________________________________________________________________
2742 Bool_t AliTRDtracker::GetTrackPoint(Int_t index, AliTrackPoint &p) const
2745 // Get track space point with index i
2746 // Origin: C.Cheshkov
2749 AliTRDcluster *cl = (AliTRDcluster *) fClusters->UncheckedAt(index);
2750 Int_t idet = cl->GetDetector();
2751 Int_t isector = fGeom->GetSector(idet);
2752 Int_t ichamber = fGeom->GetChamber(idet);
2753 Int_t iplan = fGeom->GetPlane(idet);
2755 local[0] = GetX(isector,iplan,cl->GetLocalTimeBin());
2756 local[1] = cl->GetY();
2757 local[2] = cl->GetZ();
2759 fGeom->RotateBack(idet,local,global);
2760 p.SetXYZ(global[0],global[1],global[2]);
2761 AliGeomManager::ELayerID iLayer = AliGeomManager::kTRD1;
2764 iLayer = AliGeomManager::kTRD1;
2767 iLayer = AliGeomManager::kTRD2;
2770 iLayer = AliGeomManager::kTRD3;
2773 iLayer = AliGeomManager::kTRD4;
2776 iLayer = AliGeomManager::kTRD5;
2779 iLayer = AliGeomManager::kTRD6;
2782 Int_t modId = isector * fGeom->Ncham() + ichamber;
2783 UShort_t volid = AliGeomManager::LayerToVolUID(iLayer,modId);
2784 p.SetVolumeID(volid);
2790 //_____________________________________________________________________________
2791 void AliTRDtracker::CookLabel(AliKalmanTrack *pt, Float_t wrong) const
2794 // This cooks a label. Mmmmh, smells good...
2797 Int_t label = 123456789;
2801 Int_t ncl = pt->GetNumberOfClusters();
2803 const Int_t kRange = fTrSec[0]->GetOuterTimeBin() + 1;
2807 Int_t **s = new Int_t* [kRange];
2808 for (i = 0; i < kRange; i++) {
2809 s[i] = new Int_t[2];
2811 for (i = 0; i < kRange; i++) {
2820 for (i = 0; i < ncl; i++) {
2821 index = pt->GetClusterIndex(i);
2822 AliTRDcluster *c = (AliTRDcluster *) fClusters->UncheckedAt(index);
2828 for (i = 0; i < ncl; i++) {
2829 index = pt->GetClusterIndex(i);
2830 AliTRDcluster *c = (AliTRDcluster *) fClusters->UncheckedAt(index);
2831 for (Int_t k = 0; k < 3; k++) {
2832 label = c->GetLabel(k);
2833 labelAdded = kFALSE;
2836 while ((!labelAdded) && (j < kRange)) {
2837 if ((s[j][0] == label) ||
2840 s[j][1] = s[j][1] + 1;
2852 for (i = 0; i < kRange; i++) {
2853 if (s[i][1] > max) {
2859 for (i = 0; i < kRange; i++) {
2865 if ((1.0 - Float_t(max)/ncl) > wrong) {
2869 pt->SetLabel(label);
2873 //_____________________________________________________________________________
2874 void AliTRDtracker::UseClusters(const AliKalmanTrack *t, Int_t from) const
2877 // Use clusters, but don't abuse them!
2880 const Float_t kmaxchi2 = 18;
2881 const Float_t kmincl = 10;
2883 AliTRDtrack *track = (AliTRDtrack *) t;
2885 Int_t ncl = t->GetNumberOfClusters();
2886 for (Int_t i = from; i < ncl; i++) {
2887 Int_t index = t->GetClusterIndex(i);
2888 AliTRDcluster *c = (AliTRDcluster *) fClusters->UncheckedAt(index);
2889 Int_t iplane = fGeom->GetPlane(c->GetDetector());
2890 if (track->GetTracklets(iplane).GetChi2() > kmaxchi2) {
2893 if (track->GetTracklets(iplane).GetN() < kmincl) {
2896 if (!(c->IsUsed())) {
2903 //_____________________________________________________________________________
2904 Double_t AliTRDtracker::ExpectedSigmaY2(Double_t , Double_t , Double_t ) const
2907 // Parametrised "expected" error of the cluster reconstruction in Y
2910 Double_t s = 0.08 * 0.08;
2915 //_____________________________________________________________________________
2916 Double_t AliTRDtracker::ExpectedSigmaZ2(Double_t , Double_t ) const
2919 // Parametrised "expected" error of the cluster reconstruction in Z
2922 Double_t s = 9.0 * 9.0 / 12.0;
2927 //_____________________________________________________________________________
2928 Double_t AliTRDtracker::GetX(Int_t sector, Int_t plane, Int_t localTB) const
2931 // Returns radial position which corresponds to time bin <localTB>
2932 // in tracking sector <sector> and plane <plane>
2935 Int_t index = fTrSec[sector]->CookTimeBinIndex(plane, localTB);
2936 Int_t pl = fTrSec[sector]->GetLayerNumber(index);
2938 return fTrSec[sector]->GetLayer(pl)->GetX();
2942 //_____________________________________________________________________________
2943 AliTRDtracker::AliTRDpropagationLayer
2944 ::AliTRDpropagationLayer(Double_t x, Double_t dx, Double_t rho
2945 , Double_t radLength, Int_t tbIndex, Int_t plane)
2954 ,fTimeBinIndex(tbIndex)
2967 // AliTRDpropagationLayer constructor
2970 for (Int_t i = 0; i < (Int_t) kZones; i++) {
2975 if (fTimeBinIndex >= 0) {
2976 fClusters = new AliTRDcluster*[kMaxClusterPerTimeBin];
2977 fIndex = new UInt_t[kMaxClusterPerTimeBin];
2980 for (Int_t i = 0; i < 5; i++) {
2981 fIsHole[i] = kFALSE;
2986 //_____________________________________________________________________________
2987 void AliTRDtracker::AliTRDpropagationLayer
2988 ::SetHole(Double_t Zmax, Double_t Ymax, Double_t rho
2989 , Double_t radLength, Double_t Yc, Double_t Zc)
2992 // Sets hole in the layer
3001 fHoleX0 = radLength;
3005 //_____________________________________________________________________________
3006 AliTRDtracker::AliTRDtrackingSector
3007 ::AliTRDtrackingSector(AliTRDgeometry *geo, Int_t gs)
3013 // AliTRDtrackingSector Constructor
3016 AliTRDpadPlane *padPlane = 0;
3017 AliTRDpropagationLayer *ppl = 0;
3019 // Get holes description from geometry
3020 Bool_t holes[AliTRDgeometry::kNcham];
3021 for (Int_t icham = 0; icham < AliTRDgeometry::kNcham; icham++) {
3022 holes[icham] = fGeom->IsHole(0,icham,gs);
3025 for (UInt_t i = 0; i < kMaxTimeBinIndex; i++) {
3026 fTimeBinIndex[i] = -1;
3034 // Add layers for each of the planes
3035 Double_t dxAmp = (Double_t) fGeom->CamHght(); // Amplification region
3036 //Double_t dxDrift = (Double_t) fGeom->CdrHght(); // Drift region
3038 const Int_t kNchambers = AliTRDgeometry::Ncham();
3041 Double_t ymaxsensitive = 0;
3042 Double_t *zc = new Double_t[kNchambers];
3043 Double_t *zmax = new Double_t[kNchambers];
3044 Double_t *zmaxsensitive = new Double_t[kNchambers];
3046 AliTRDCommonParam *commonParam = AliTRDCommonParam::Instance();
3048 AliErrorGeneral("AliTRDtrackingSector::Ctor"
3049 ,"Could not get common parameters\n");
3053 for (Int_t plane = 0; plane < AliTRDgeometry::Nplan(); plane++) {
3055 ymax = fGeom->GetChamberWidth(plane) / 2.0;
3056 padPlane = commonParam->GetPadPlane(plane,0);
3057 ymaxsensitive = (padPlane->GetColSize(1) * padPlane->GetNcols() - 4.0) / 2.0;
3059 for (Int_t ch = 0; ch < kNchambers; ch++) {
3060 zmax[ch] = fGeom->GetChamberLength(plane,ch) / 2.0;
3061 Float_t pad = padPlane->GetRowSize(1);
3062 Float_t row0 = commonParam->GetRow0(plane,ch,0);
3063 Int_t nPads = commonParam->GetRowMax(plane,ch,0);
3064 zmaxsensitive[ch] = Float_t(nPads) * pad / 2.0;
3065 zc[ch] = -(pad * nPads) / 2.0 + row0;
3068 dx = AliTRDcalibDB::Instance()->GetVdrift(0,0,0)
3069 / commonParam->GetSamplingFrequency();
3070 rho = 0.00295 * 0.85; //????
3073 Double_t x0 = (Double_t) AliTRDgeometry::GetTime0(plane);
3074 //Double_t xbottom = x0 - dxDrift;
3075 //Double_t xtop = x0 + dxAmp;
3077 Int_t nTimeBins = AliTRDcalibDB::Instance()->GetNumberOfTimeBins();
3078 for (Int_t iTime = 0; iTime < nTimeBins; iTime++) {
3080 Double_t xlayer = iTime * dx - dxAmp;
3081 //if (xlayer<0) xlayer = dxAmp / 2.0;
3084 tbIndex = CookTimeBinIndex(plane,iTime);
3085 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,tbIndex,plane);
3086 ppl->SetYmax(ymax,ymaxsensitive);
3087 ppl->SetZ(zc,zmax,zmaxsensitive);
3088 ppl->SetHoles(holes);
3099 delete [] zmaxsensitive;
3103 //_____________________________________________________________________________
3104 AliTRDtracker::AliTRDtrackingSector
3105 ::AliTRDtrackingSector(const AliTRDtrackingSector &/*t*/)
3116 //_____________________________________________________________________________
3117 Int_t AliTRDtracker::AliTRDtrackingSector
3118 ::CookTimeBinIndex(Int_t plane, Int_t localTB) const
3121 // depending on the digitization parameters calculates "global"
3122 // time bin index for timebin <localTB> in plane <plane>
3126 Int_t tbPerPlane = AliTRDcalibDB::Instance()->GetNumberOfTimeBins();
3127 Int_t gtb = (plane+1) * tbPerPlane - localTB - 1;
3139 //_____________________________________________________________________________
3140 void AliTRDtracker::AliTRDtrackingSector
3141 ::MapTimeBinLayers()
3144 // For all sensitive time bins sets corresponding layer index
3145 // in the array fTimeBins
3150 for (Int_t i = 0; i < fN; i++) {
3152 index = fLayers[i]->GetTimeBinIndex();
3157 if (index >= (Int_t) kMaxTimeBinIndex) {
3158 //AliWarning(Form("Index %d exceeds allowed maximum of %d!\n"
3159 // ,index,kMaxTimeBinIndex-1));
3163 fTimeBinIndex[index] = i;
3169 //_____________________________________________________________________________
3170 Int_t AliTRDtracker::AliTRDtrackingSector
3171 ::GetLayerNumber(Double_t x) const
3174 // Returns the number of time bin which in radial position is closest to <x>
3177 if (x >= fLayers[fN-1]->GetX()) {
3180 if (x <= fLayers[ 0]->GetX()) {
3186 Int_t m = (b + e) / 2;
3188 for ( ; b < e; m = (b + e) / 2) {
3189 if (x > fLayers[m]->GetX()) {
3197 if (TMath::Abs(x - fLayers[m]->GetX()) > TMath::Abs(x - fLayers[m+1]->GetX())) {
3206 //_____________________________________________________________________________
3207 Int_t AliTRDtracker::AliTRDtrackingSector
3208 ::GetInnerTimeBin() const
3211 // Returns number of the innermost SENSITIVE propagation layer
3214 return GetLayerNumber(0);
3218 //_____________________________________________________________________________
3219 Int_t AliTRDtracker::AliTRDtrackingSector
3220 ::GetOuterTimeBin() const
3223 // Returns number of the outermost SENSITIVE time bin
3226 return GetLayerNumber(GetNumberOfTimeBins() - 1);
3230 //_____________________________________________________________________________
3231 Int_t AliTRDtracker::AliTRDtrackingSector
3232 ::GetNumberOfTimeBins() const
3235 // Returns number of SENSITIVE time bins
3241 for (tb = kMaxTimeBinIndex - 1; tb >= 0; tb--) {
3242 layer = GetLayerNumber(tb);
3252 //_____________________________________________________________________________
3253 void AliTRDtracker::AliTRDtrackingSector
3254 ::InsertLayer(AliTRDpropagationLayer *pl)
3257 // Insert layer <pl> in fLayers array.
3258 // Layers are sorted according to X coordinate.
3261 if (fN == ((Int_t) kMaxLayersPerSector)) {
3262 //AliWarning("Too many layers !\n");
3271 Int_t i = Find(pl->GetX());
3273 memmove(fLayers+i+1,fLayers+i,(fN-i)*sizeof(AliTRDpropagationLayer*));
3280 //_____________________________________________________________________________
3281 Int_t AliTRDtracker::AliTRDtrackingSector
3282 ::Find(Double_t x) const
3285 // Returns index of the propagation layer nearest to X
3288 if (x <= fLayers[0]->GetX()) {
3292 if (x > fLayers[fN-1]->GetX()) {
3298 Int_t m = (b + e) / 2;
3300 for (; b < e; m = (b + e) / 2) {
3301 if (x > fLayers[m]->GetX()) {
3313 //_____________________________________________________________________________
3314 void AliTRDtracker::AliTRDpropagationLayer
3315 ::SetZ(Double_t *center, Double_t *w, Double_t *wsensitive )
3318 // set centers and the width of sectors
3321 for (Int_t icham = 0; icham < AliTRDgeometry::kNcham; icham++) {
3322 fZc[icham] = center[icham];
3323 fZmax[icham] = w[icham];
3324 fZmaxSensitive[icham] = wsensitive[icham];
3329 //_____________________________________________________________________________
3330 void AliTRDtracker::AliTRDpropagationLayer::SetHoles(Bool_t *holes)
3333 // set centers and the width of sectors
3338 for (Int_t icham = 0; icham < AliTRDgeometry::kNcham; icham++) {
3339 fIsHole[icham] = holes[icham];
3347 //_____________________________________________________________________________
3348 void AliTRDtracker::AliTRDpropagationLayer
3349 ::InsertCluster(AliTRDcluster *c, UInt_t index)
3352 // Insert cluster in cluster array.
3353 // Clusters are sorted according to Y coordinate.
3356 if (fTimeBinIndex < 0) {
3357 //AliWarning("Attempt to insert cluster into non-sensitive time bin!\n");
3361 if (fN == (Int_t) kMaxClusterPerTimeBin) {
3362 //AliWarning("Too many clusters !\n");
3368 fClusters[fN++] = c;
3372 Int_t i = Find(c->GetY());
3373 memmove(fClusters+i+1,fClusters+i,(fN-i)*sizeof(AliTRDcluster*));
3374 memmove(fIndex +i+1,fIndex +i,(fN-i)*sizeof(UInt_t));
3381 //_____________________________________________________________________________
3382 Int_t AliTRDtracker::AliTRDpropagationLayer::Find(Float_t y) const
3385 // Returns index of the cluster nearest in Y
3391 if (y <= fClusters[0]->GetY()) {
3394 if (y > fClusters[fN-1]->GetY()) {
3400 Int_t m = (b + e) / 2;
3402 for ( ; b < e; m = (b + e) / 2) {
3403 if (y > fClusters[m]->GetY()) {
3415 //_____________________________________________________________________________
3416 Int_t AliTRDtracker::AliTRDpropagationLayer
3417 ::FindNearestCluster(Float_t y, Float_t z, Float_t maxroad
3418 , Float_t maxroadz) const
3421 // Returns index of the cluster nearest to the given y,z
3426 Float_t mindist = maxroad;
3428 for (Int_t i = Find(y-maxroad); i < maxn; i++) {
3429 AliTRDcluster *c = (AliTRDcluster *) (fClusters[i]);
3430 Float_t ycl = c->GetY();
3431 if (ycl > (y + maxroad)) {
3434 if (TMath::Abs(c->GetZ() - z) > maxroadz) {
3437 if (TMath::Abs(ycl - y) < mindist) {
3438 mindist = TMath::Abs(ycl - y);
3447 //_____________________________________________________________________________
3448 Double_t AliTRDtracker::GetTiltFactor(const AliTRDcluster *c)
3451 // Returns correction factor for tilted pads geometry
3454 Int_t det = c->GetDetector();
3455 Int_t plane = fGeom->GetPlane(det);
3456 AliTRDpadPlane *padPlane = AliTRDCommonParam::Instance()->GetPadPlane(plane,0);
3457 Double_t h01 = TMath::Tan(-TMath::Pi() / 180.0 * padPlane->GetTiltingAngle());
3467 //_____________________________________________________________________________
3468 void AliTRDtracker::CookdEdxTimBin(AliTRDtrack &TRDtrack)
3471 // This is setting fdEdxPlane and fTimBinPlane
3472 // Sums up the charge in each plane for track TRDtrack and also get the
3473 // Time bin for Max. Cluster
3474 // Prashant Shukla (shukla@physi.uni-heidelberg.de)
3477 Double_t clscharge[AliESDtrack::kNPlane][AliESDtrack::kNSlice];
3478 Double_t maxclscharge[AliESDtrack::kNPlane];
3479 Int_t nCluster[AliESDtrack::kNPlane][AliESDtrack::kNSlice];
3480 Int_t timebin[AliESDtrack::kNPlane];
3482 // Initialization of cluster charge per plane.
3483 for (Int_t iPlane = 0; iPlane < AliESDtrack::kNPlane; iPlane++) {
3484 for (Int_t iSlice = 0; iSlice < AliESDtrack::kNSlice; iSlice++) {
3485 clscharge[iPlane][iSlice] = 0.0;
3486 nCluster[iPlane][iSlice] = 0;
3490 // Initialization of cluster charge per plane.
3491 for (Int_t iPlane = 0; iPlane < AliESDtrack::kNPlane; iPlane++) {
3492 timebin[iPlane] = -1;
3493 maxclscharge[iPlane] = 0.0;
3496 // Loop through all clusters associated to track TRDtrack
3497 Int_t nClus = TRDtrack.GetNumberOfClusters(); // from Kalmantrack
3498 for (Int_t iClus = 0; iClus < nClus; iClus++) {
3499 Double_t charge = TRDtrack.GetClusterdQdl(iClus);
3500 Int_t index = TRDtrack.GetClusterIndex(iClus);
3501 AliTRDcluster *pTRDcluster = (AliTRDcluster *) GetCluster(index);
3505 Int_t tb = pTRDcluster->GetLocalTimeBin();
3509 Int_t detector = pTRDcluster->GetDetector();
3510 Int_t iPlane = fGeom->GetPlane(detector);
3511 if (iPlane >= AliESDtrack::kNPlane) {
3512 AliError(Form("Wrong plane %d",iPlane));
3515 Int_t iSlice = tb * AliESDtrack::kNSlice
3516 / AliTRDcalibDB::Instance()->GetNumberOfTimeBins();
3517 if (iSlice >= AliESDtrack::kNSlice) {
3518 AliError(Form("Wrong slice %d",iSlice));
3521 clscharge[iPlane][iSlice] = clscharge[iPlane][iSlice] + charge;
3522 if (charge > maxclscharge[iPlane]) {
3523 maxclscharge[iPlane] = charge;
3524 timebin[iPlane] = tb;
3526 nCluster[iPlane][iSlice]++;
3527 } // End of loop over cluster
3529 // Setting the fdEdxPlane and fTimBinPlane variabales
3530 Double_t totalCharge = 0.0;
3532 for (Int_t iPlane = 0; iPlane < AliESDtrack::kNPlane; iPlane++) {
3533 for (Int_t iSlice = 0; iSlice < AliESDtrack::kNSlice; iSlice++) {
3534 if (nCluster[iPlane][iSlice]) {
3535 clscharge[iPlane][iSlice] /= nCluster[iPlane][iSlice];
3537 TRDtrack.SetPIDsignals(clscharge[iPlane][iSlice],iPlane,iSlice);
3538 totalCharge = totalCharge+clscharge[iPlane][iSlice];
3540 TRDtrack.SetPIDTimBin(timebin[iPlane],iPlane);
3543 // Still needed ????
3545 // Int_t nc=TRDtrack.GetNumberOfClusters();
3547 // for (i=0; i<nc; i++) dedx += TRDtrack.GetClusterdQdl(i);
3549 // for (Int_t iPlane = 0; iPlane < kNPlane; iPlane++) {
3550 // TRDtrack.SetPIDsignals(dedx, iPlane);
3551 // TRDtrack.SetPIDTimBin(timbin[iPlane], iPlane);
3556 //_____________________________________________________________________________
3557 Int_t AliTRDtracker::FindClusters(Int_t sector, Int_t t0, Int_t t1
3558 , AliTRDtrack *track
3559 , Int_t *clusters, AliTRDtracklet &tracklet)
3563 // Try to find nearest clusters to the track in timebins from t0 to t1
3565 // Correction coeficients - depend on TRD parameters - to be changed accordingly
3571 Double_t xmean = 0.0; // Reference x
3572 Double_t dz[10][100];
3573 Double_t dy[10][100];
3577 Int_t indexes[10][100]; // Indexes of the clusters in the road
3578 Int_t best[10][100]; // Index of best matching cluster
3579 AliTRDcluster *cl[10][100]; // Pointers to the clusters in the road
3581 for (Int_t it = 0; it < 100; it++) {
3588 for (Int_t ih = 0; ih < 10;ih++) {
3589 indexes[ih][it] = -2; // Reset indexes1
3591 dz[ih][it] = -100.0;
3592 dy[ih][it] = -100.0;
3597 Double_t x0 = track->GetX();
3598 Double_t sigmaz = TMath::Sqrt(TMath::Abs(track->GetSigmaZ2()));
3603 Int_t detector = -1;
3604 Float_t padlength = 0.0;
3605 AliTRDtrack track2(* track);
3606 Float_t snpy = track->GetSnp();
3607 Float_t tany = TMath::Sqrt(snpy*snpy / (1.0 - snpy*snpy));
3612 Double_t sy2 = ExpectedSigmaY2(x0,track->GetTgl(),track->GetPt());
3613 Double_t sz2 = ExpectedSigmaZ2(x0,track->GetTgl());
3614 Double_t road = 15.0 * TMath::Sqrt(track->GetSigmaY2() + sy2);
3620 for (Int_t it = 0; it < t1-t0; it++) {
3622 Double_t maxChi2[2] = { fgkMaxChi2, fgkMaxChi2 };
3623 AliTRDpropagationLayer &timeBin = *(fTrSec[sector]->GetLayer(it+t0));
3625 continue; // No indexes1
3628 Int_t maxn = timeBin;
3629 x[it] = timeBin.GetX();
3630 track2.PropagateTo(x[it]);
3631 yt[it] = track2.GetY();
3632 zt[it] = track2.GetZ();
3634 Double_t y = yt[it];
3635 Double_t z = zt[it];
3636 Double_t chi2 = 1000000.0;
3640 // Find 2 nearest cluster at given time bin
3642 int checkPoint[4] = {0,0,0,0};
3643 double minY = 123456789;
3644 double minD[2] = {1,1};
3646 for (Int_t i = timeBin.Find(y - road); i < maxn; i++) {
3647 //for (Int_t i = 0; i < maxn; i++) {
3649 AliTRDcluster *c = (AliTRDcluster *) (timeBin[i]);
3650 h01 = GetTiltFactor(c);
3652 Int_t det = c->GetDetector();
3653 plane = fGeom->GetPlane(det);
3654 padlength = TMath::Sqrt(c->GetSigmaZ2() * 12.0);
3657 //if (c->GetLocalTimeBin()==0) continue;
3658 if (c->GetY() > (y + road)) {
3662 fHDeltaX->Fill(c->GetX() - x[it]);
3663 //printf("%f\t%f\t%f \n", c->GetX(), x[it], c->GetX()-x[it]);
3665 if (TMath::Abs(c->GetY()-y) < TMath::Abs(minY)) {
3667 minD[0] = c->GetY()-y;
3668 minD[1] = c->GetZ()-z;
3673 fHMinZ->Fill(c->GetZ() - z);
3674 if ((c->GetZ() - z) * (c->GetZ() - z) > 2 * (12.0 * sz2)) {
3679 Double_t dist = TMath::Abs(c->GetZ() - z);
3680 if (dist > (0.5 * padlength + 6.0 * sigmaz)) { // 0.5
3681 continue; // 6 sigma boundary cut
3685 Double_t cost = 0.0;
3686 // Sigma boundary cost function
3687 if (dist> (0.5 * padlength - sigmaz)){
3688 cost = (dist - 0.5*padlength) / (2.0 * sigmaz);
3690 cost = (cost + 1.0) * (cost + 1.0);
3696 //Int_t label = TMath::Abs(track->GetLabel());
3697 //if (c->GetLabel(0)!=label && c->GetLabel(1)!=label&&c->GetLabel(2)!=label) continue;
3698 chi2 = track2.GetPredictedChi2(c,h01) + cost;
3701 if (chi2 > maxChi2[1]) {
3706 detector = c->GetDetector();
3707 // Store the clusters in the road
3708 for (Int_t ih = 2; ih < 9; ih++) {
3709 if (cl[ih][it] == 0) {
3711 indexes[ih][it] = timeBin.GetIndex(i); // Index - 9 - reserved for outliers
3716 if (chi2 < maxChi2[0]) {
3717 maxChi2[1] = maxChi2[0];
3719 indexes[1][it] = indexes[0][it];
3720 cl[1][it] = cl[0][it];
3721 indexes[0][it] = timeBin.GetIndex(i);
3727 indexes[1][it] = timeBin.GetIndex(i);
3731 for(int iCheckPoint = 0; iCheckPoint<4; iCheckPoint++)
3732 fHFindCl[iCheckPoint]->Fill(checkPoint[iCheckPoint]);
3734 if (checkPoint[3]) {
3735 if (track->GetPt() > 0) fHMinYPos->Fill(minY);
3736 else fHMinYNeg->Fill(minY);
3738 fHMinD->Fill(minD[0], minD[1]);
3751 xmean /= Float_t(nfound); // Middle x
3752 track2.PropagateTo(xmean); // Propagate track to the center
3755 // Choose one of the variants
3760 Double_t sumdy = 0.0;
3761 Double_t sumdy2 = 0.0;
3762 Double_t sumx = 0.0;
3763 Double_t sumxy = 0.0;
3764 Double_t sumx2 = 0.0;
3765 Double_t mpads = 0.0;
3771 Double_t moffset[10]; // Mean offset
3772 Double_t mean[10]; // Mean value
3773 Double_t angle[10]; // Angle
3775 Double_t smoffset[10]; // Sigma of mean offset
3776 Double_t smean[10]; // Sigma of mean value
3777 Double_t sangle[10]; // Sigma of angle
3778 Double_t smeanangle[10]; // Correlation
3780 Double_t sigmas[10];
3781 Double_t tchi2s[10]; // Chi2s for tracklet
3783 for (Int_t it = 0; it < 10; it++) {
3789 moffset[it] = 0.0; // Mean offset
3790 mean[it] = 0.0; // Mean value
3791 angle[it] = 0.0; // Angle
3793 smoffset[it] = 1.0e5; // Sigma of mean offset
3794 smean[it] = 1.0e5; // Sigma of mean value
3795 sangle[it] = 1.0e5; // Sigma of angle
3796 smeanangle[it] = 0.0; // Correlation
3799 tchi2s[it] = 1.0e5; // Chi2s for tracklet
3806 for (Int_t it = 0; it < t1 - t0; it++) {
3810 for (Int_t dt = -3; dt <= 3; dt++) {
3814 if (it+dt > t1-t0) {
3817 if (!cl[0][it+dt]) {
3820 zmean[it] += cl[0][it+dt]->GetZ();
3823 zmean[it] /= nmean[it];
3826 for (Int_t it = 0; it < t1 - t0; it++) {
3830 for (Int_t ih = 0; ih < 10; ih++) {
3831 dz[ih][it] = -100.0;
3832 dy[ih][it] = -100.0;
3836 Double_t xcluster = cl[ih][it]->GetX();
3839 track2.GetProlongation(xcluster,ytrack,ztrack );
3840 dz[ih][it] = cl[ih][it]->GetZ()- ztrack; // Calculate distance from track in z
3841 dy[ih][it] = cl[ih][it]->GetY() + dz[ih][it]*h01 - ytrack; // and in y
3848 if ((TMath::Abs(cl[0][it]->GetZ()-zmean[it]) > padlength * 0.8) &&
3850 if (TMath::Abs(cl[1][it]->GetZ()-zmean[it]) < padlength * 0.5) {
3858 // Iterative choice of "best path"
3860 Int_t label = TMath::Abs(track->GetLabel());
3863 for (Int_t iter = 0; iter < 9; iter++) {
3878 for (Int_t it = 0; it < t1 - t0; it++) {
3880 if (!cl[best[iter][it]][it]) {
3884 // Calculates pad-row changes
3885 Double_t zbefore = cl[best[iter][it]][it]->GetZ();
3886 Double_t zafter = cl[best[iter][it]][it]->GetZ();
3887 for (Int_t itd = it - 1; itd >= 0; itd--) {
3888 if (cl[best[iter][itd]][itd]) {
3889 zbefore = cl[best[iter][itd]][itd]->GetZ();
3893 for (Int_t itd = it + 1; itd < t1 - t0; itd++) {
3894 if (cl[best[iter][itd]][itd]) {
3895 zafter = cl[best[iter][itd]][itd]->GetZ();
3899 if ((TMath::Abs(cl[best[iter][it]][it]->GetZ()-zbefore) > 0.1) &&
3900 (TMath::Abs(cl[best[iter][it]][it]->GetZ()- zafter) > 0.1)) {
3904 Double_t dx = x[it]-xmean; // Distance to reference x
3905 sumz += cl[best[iter][it]][it]->GetZ();
3907 sumdy += dy[best[iter][it]][it];
3908 sumdy2 += dy[best[iter][it]][it]*dy[best[iter][it]][it];
3911 sumxy += dx*dy[best[iter][it]][it];
3912 mpads += cl[best[iter][it]][it]->GetNPads();
3913 if ((cl[best[iter][it]][it]->GetLabel(0) == label) ||
3914 (cl[best[iter][it]][it]->GetLabel(1) == label) ||
3915 (cl[best[iter][it]][it]->GetLabel(2) == label)) {
3925 // calculates line parameters
3927 Double_t det = sum*sumx2 - sumx*sumx;
3928 angle[iter] = (sum*sumxy - sumx*sumdy) / det;
3929 mean[iter] = (sumx2*sumdy - sumx*sumxy) / det;
3930 meanz[iter] = sumz / sum;
3931 moffset[iter] = sumdy / sum;
3932 mpads /= sum; // Mean number of pads
3934 Double_t sigma2 = 0.0; // Normalized residuals - for line fit
3935 Double_t sigma1 = 0.0; // Normalized residuals - constant fit
3937 for (Int_t it = 0; it < t1 - t0; it++) {
3938 if (!cl[best[iter][it]][it]) {
3941 Double_t dx = x[it] - xmean;
3942 Double_t ytr = mean[iter] + angle[iter] * dx;
3943 sigma2 += (dy[best[iter][it]][it] - ytr)
3944 * (dy[best[iter][it]][it] - ytr);
3945 sigma1 += (dy[best[iter][it]][it] - moffset[iter])
3946 * (dy[best[iter][it]][it] - moffset[iter]);
3949 sigma2 /= (sum - 2); // Normalized residuals
3950 sigma1 /= (sum - 1); // Normalized residuals
3951 smean[iter] = sigma2 * (sumx2 / det); // Estimated error2 of mean
3952 sangle[iter] = sigma2 * ( sum / det); // Estimated error2 of angle
3953 smeanangle[iter] = sigma2 * (-sumx / det); // Correlation
3954 sigmas[iter] = TMath::Sqrt(sigma1);
3955 smoffset[iter] = (sigma1 / sum) + 0.01*0.01; // Sigma of mean offset + unisochronity sigma
3958 // Iterative choice of "better path"
3960 for (Int_t it = 0; it < t1 - t0; it++) {
3962 if (!cl[best[iter][it]][it]) {
3966 // Add unisochronity + angular effect contribution
3967 Double_t sigmatr2 = smoffset[iter] + 0.5*tany*tany;
3968 Double_t sweight = 1.0/sigmatr2 + 1.0/track->GetSigmaY2();
3969 Double_t weighty = (moffset[iter] / sigmatr2) / sweight; // Weighted mean
3970 Double_t sigmacl = TMath::Sqrt(sigma1*sigma1 + track->GetSigmaY2());
3971 Double_t mindist = 100000.0;
3974 for (Int_t ih = 0; ih < 10; ih++) {
3978 Double_t dist2 = (dy[ih][it] - weighty) / sigmacl;
3979 dist2 *= dist2; // Chi2 distance
3980 if (dist2 < mindist) {
3985 best[iter+1][it] = ihbest;
3989 // Update best hypothesy if better chi2 according tracklet position and angle
3991 Double_t sy2 = smean[iter] + track->GetSigmaY2();
3992 Double_t sa2 = sangle[iter] + track->GetSigmaSnp2(); // track->fCee;
3993 Double_t say = track->GetSigmaSnpY(); // track->fCey;
3994 //Double_t chi20 = mean[bestiter]*mean[bestiter ] / sy2+angle[bestiter]*angle[bestiter]/sa2;
3995 //Double_t chi21 = mean[iter]*mean[iter] / sy2+angle[iter]*angle[iter]/sa2;
3997 Double_t detchi = sy2*sa2 - say*say;
3998 Double_t invers[3] = {sa2/detchi,sy2/detchi,-say/detchi}; // Inverse value of covariance matrix
4000 Double_t chi20 = mean[bestiter] * mean[bestiter] * invers[0]
4001 + angle[bestiter] * angle[bestiter] * invers[1]
4002 + 2.0 * mean[bestiter] * angle[bestiter] * invers[2];
4003 Double_t chi21 = mean[iter] * mean[iter] * invers[0]
4004 + angle[iter] * angle[iter] * invers[1]
4005 + 2.0 * mean[iter] * angle[iter] * invers[2];
4006 tchi2s[iter] = chi21;
4008 if ((changes[iter] <= changes[bestiter]) &&
4018 Double_t sigma2 = sigmas[0]; // Choose as sigma from 0 iteration
4019 Short_t maxpos = -1;
4020 Float_t maxcharge = 0.0;
4021 Short_t maxpos4 = -1;
4022 Float_t maxcharge4 = 0.0;
4023 Short_t maxpos5 = -1;
4024 Float_t maxcharge5 = 0.0;
4026 //if (tchi2s[bestiter]>25.) sigma2*=tchi2s[bestiter]/25.;
4027 //if (tchi2s[bestiter]>25.) sigma2=1000.; // dont'accept
4029 Double_t exB = AliTRDcalibDB::Instance()->GetOmegaTau(AliTRDcalibDB::Instance()->GetVdrift(0,0,0)
4030 ,-AliTracker::GetBz()*0.1);
4031 Double_t expectederr = sigma2*sigma2 + 0.01*0.01;
4033 expectederr += (mpads - 3.5) * 0.04;
4035 if (changes[bestiter] > 1) {
4036 expectederr += changes[bestiter] * 0.01;
4038 expectederr += (0.03 * (tany-exB)*(tany-exB)) * 15.0;
4039 //if (tchi2s[bestiter]>18.) expectederr*= tchi2s[bestiter]/18.;
4040 //expectederr+=10000;
4042 for (Int_t it = 0; it < t1 - t0; it++) {
4044 if (!cl[best[bestiter][it]][it]) {
4048 cl[best[bestiter][it]][it]->SetSigmaY2(expectederr); // Set cluster error
4049 if (!cl[best[bestiter][it]][it]->IsUsed()) {
4050 cl[best[bestiter][it]][it]->SetY(cl[best[bestiter][it]][it]->GetY());
4051 //cl[best[bestiter][it]][it]->Use();
4054 // Time bins with maximal charge
4055 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ()) > maxcharge) {
4056 maxcharge = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
4057 maxpos = cl[best[bestiter][it]][it]->GetLocalTimeBin();
4060 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ()) > maxcharge4) {
4061 if (cl[best[bestiter][it]][it]->GetLocalTimeBin() >= 4) {
4062 maxcharge4 = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
4063 maxpos4 = cl[best[bestiter][it]][it]->GetLocalTimeBin();
4067 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ()) > maxcharge5) {
4068 if (cl[best[bestiter][it]][it]->GetLocalTimeBin() >= 5) {
4069 maxcharge5 = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
4070 maxpos5 = cl[best[bestiter][it]][it]->GetLocalTimeBin();
4074 // Time bins with maximal charge
4075 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ()) > maxcharge) {
4076 maxcharge = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
4077 maxpos = cl[best[bestiter][it]][it]->GetLocalTimeBin();
4080 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ()) > maxcharge4) {
4081 if (cl[best[bestiter][it]][it]->GetLocalTimeBin() >= 4) {
4082 maxcharge4 = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
4083 maxpos4 = cl[best[bestiter][it]][it]->GetLocalTimeBin();
4087 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ()) > maxcharge5) {
4088 if (cl[best[bestiter][it]][it]->GetLocalTimeBin() >= 5) {
4089 maxcharge5 = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
4090 maxpos5 = cl[best[bestiter][it]][it]->GetLocalTimeBin();
4094 clusters[it+t0] = indexes[best[bestiter][it]][it];
4096 // Still needed ????
4097 //if (cl[best[bestiter][it]][it]->GetLocalTimeBin()>4 &&
4098 //cl[best[bestiter][it]][it]->GetLocalTimeBin()<18) clusters[it+t0]
4099 // = indexes[best[bestiter][it]][it]; //Test
4104 // Set tracklet parameters
4106 Double_t trackleterr2 = smoffset[bestiter] + 0.01*0.01;
4108 trackleterr2 += (mpads - 3.5) * 0.04;
4110 trackleterr2 += changes[bestiter] * 0.01;
4111 trackleterr2 *= TMath::Max(14.0 - nfound,1.0);
4112 trackleterr2 += 0.2 * (tany-exB)*(tany-exB);
4114 // Set tracklet parameters
4116 ,track2.GetY() + moffset[bestiter]
4120 tracklet.SetTilt(h01);
4121 tracklet.SetP0(mean[bestiter]);
4122 tracklet.SetP1(angle[bestiter]);
4123 tracklet.SetN(nfound);
4124 tracklet.SetNCross(changes[bestiter]);
4125 tracklet.SetPlane(plane);
4126 tracklet.SetSigma2(expectederr);
4127 tracklet.SetChi2(tchi2s[bestiter]);
4128 tracklet.SetMaxPos(maxpos,maxpos4,maxpos5);
4129 track->SetTracklets(plane,tracklet);
4130 track->SetNWrong(track->GetNWrong() + nbad[0]);
4135 TClonesArray array0("AliTRDcluster");
4136 TClonesArray array1("AliTRDcluster");
4137 array0.ExpandCreateFast(t1 - t0 + 1);
4138 array1.ExpandCreateFast(t1 - t0 + 1);
4139 TTreeSRedirector &cstream = *fDebugStreamer;
4140 AliTRDcluster dummy;
4144 for (Int_t it = 0; it < t1 - t0; it++) {
4145 dy0[it] = dy[0][it];
4146 dyb[it] = dy[best[bestiter][it]][it];
4148 new(array0[it]) AliTRDcluster(*cl[0][it]);
4151 new(array0[it]) AliTRDcluster(dummy);
4153 if(cl[best[bestiter][it]][it]) {
4154 new(array1[it]) AliTRDcluster(*cl[best[bestiter][it]][it]);
4157 new(array1[it]) AliTRDcluster(dummy);
4160 TGraph graph0(t1-t0,x,dy0);
4161 TGraph graph1(t1-t0,x,dyb);
4162 TGraph graphy(t1-t0,x,yt);
4163 TGraph graphz(t1-t0,x,zt);
4165 if (AliTRDReconstructor::StreamLevel() > 0) {
4166 cstream << "tracklet"
4167 << "track.=" << track // Track parameters
4168 << "tany=" << tany // Tangent of the local track angle
4169 << "xmean=" << xmean // Xmean - reference x of tracklet
4170 << "tilt=" << h01 // Tilt angle
4171 << "nall=" << nall // Number of foundable clusters
4172 << "nfound=" << nfound // Number of found clusters
4173 << "clfound=" << clfound // Total number of found clusters in road
4174 << "mpads=" << mpads // Mean number of pads per cluster
4175 << "plane=" << plane // Plane number
4176 << "detector=" << detector // Detector number
4177 << "road=" << road // The width of the used road
4178 << "graph0.=" << &graph0 // x - y = dy for closest cluster
4179 << "graph1.=" << &graph1 // x - y = dy for second closest cluster
4180 << "graphy.=" << &graphy // y position of the track
4181 << "graphz.=" << &graphz // z position of the track
4182 //<< "fCl.=" << &array0 // closest cluster
4183 //<< "fCl2.=" << &array1 // second closest cluster
4184 << "maxpos=" << maxpos // Maximal charge postion
4185 << "maxcharge=" << maxcharge // Maximal charge
4186 << "maxpos4=" << maxpos4 // Maximal charge postion - after bin 4
4187 << "maxcharge4=" << maxcharge4 // Maximal charge - after bin 4
4188 << "maxpos5=" << maxpos5 // Maximal charge postion - after bin 5
4189 << "maxcharge5=" << maxcharge5 // Maximal charge - after bin 5
4190 << "bestiter=" << bestiter // Best iteration number
4191 << "tracklet.=" << &tracklet // Corrspond to the best iteration
4192 << "tchi20=" << tchi2s[0] // Chi2 of cluster in the 0 iteration
4193 << "tchi2b=" << tchi2s[bestiter] // Chi2 of cluster in the best iteration
4194 << "sigmas0=" << sigmas[0] // Residuals sigma
4195 << "sigmasb=" << sigmas[bestiter] // Residulas sigma
4196 << "ngood0=" << ngood[0] // Number of good clusters in 0 iteration
4197 << "nbad0=" << nbad[0] // Number of bad clusters in 0 iteration
4198 << "ngoodb=" << ngood[bestiter] // in best iteration
4199 << "nbadb=" << nbad[bestiter] // in best iteration
4200 << "changes0=" << changes[0] // Changes of pardrows in iteration number 0
4201 << "changesb=" << changes[bestiter] // Changes of pardrows in best iteration
4202 << "moffset0=" << moffset[0] // Offset fixing angle in iter=0
4203 << "smoffset0=" << smoffset[0] // Sigma of offset fixing angle in iter=0
4204 << "moffsetb=" << moffset[bestiter] // Offset fixing angle in iter=best
4205 << "smoffsetb=" << smoffset[bestiter] // Sigma of offset fixing angle in iter=best
4206 << "mean0=" << mean[0] // Mean dy in iter=0;
4207 << "smean0=" << smean[0] // Sigma of mean dy in iter=0
4208 << "meanb=" << mean[bestiter] // Mean dy in iter=best
4209 << "smeanb=" << smean[bestiter] // Sigma of mean dy in iter=best
4210 << "angle0=" << angle[0] // Angle deviation in the iteration number 0
4211 << "sangle0=" << sangle[0] // Sigma of angular deviation in iteration number 0
4212 << "angleb=" << angle[bestiter] // Angle deviation in the best iteration
4213 << "sangleb=" << sangle[bestiter] // Sigma of angle deviation in the best iteration
4214 << "expectederr=" << expectederr // Expected error of cluster position
4222 //_____________________________________________________________________________
4223 Int_t AliTRDtracker::Freq(Int_t n, const Int_t *inlist
4224 , Int_t *outlist, Bool_t down)
4227 // Sort eleements according occurancy
4228 // The size of output array has is 2*n
4231 Int_t *sindexS = new Int_t[n]; // Temporary array for sorting
4232 Int_t *sindexF = new Int_t[2*n];
4233 for (Int_t i = 0; i < n; i++) {
4237 TMath::Sort(n,inlist,sindexS,down);
4239 Int_t last = inlist[sindexS[0]];
4242 sindexF[0+n] = last;
4246 for (Int_t i = 1; i < n; i++) {
4247 val = inlist[sindexS[i]];
4249 sindexF[countPos]++;
4253 sindexF[countPos+n] = val;
4254 sindexF[countPos]++;
4262 // Sort according frequency
4263 TMath::Sort(countPos,sindexF,sindexS,kTRUE);
4265 for (Int_t i = 0; i < countPos; i++) {
4266 outlist[2*i ] = sindexF[sindexS[i]+n];
4267 outlist[2*i+1] = sindexF[sindexS[i]];
4277 //_____________________________________________________________________________
4278 AliTRDtrack *AliTRDtracker::RegisterSeed(AliTRDseed *seeds, Double_t *params)
4284 Double_t alpha = AliTRDgeometry::GetAlpha();
4285 Double_t shift = AliTRDgeometry::GetAlpha()/2.0;
4289 c[ 1] = 0.0; c[ 2] = 2.0;
4290 c[ 3] = 0.0; c[ 4] = 0.0; c[ 5] = 0.02;
4291 c[ 6] = 0.0; c[ 7] = 0.0; c[ 8] = 0.0; c[ 9] = 0.1;
4292 c[10] = 0.0; c[11] = 0.0; c[12] = 0.0; c[13] = 0.0; c[14] = params[5]*params[5]*0.01;
4295 AliTRDcluster *cl = 0;
4297 for (Int_t ilayer = 0; ilayer < 6; ilayer++) {
4298 if (seeds[ilayer].IsOK()) {
4299 for (Int_t itime = 22; itime > 0; itime--) {
4300 if (seeds[ilayer].GetIndexes(itime) > 0) {
4301 index = seeds[ilayer].GetIndexes(itime);
4302 cl = seeds[ilayer].GetClusters(itime);
4315 AliTRDtrack *track = new AliTRDtrack(cl
4320 ,params[6]*alpha+shift);
4321 track->PropagateTo(params[0]-5.0);
4322 track->ResetCovariance(1);
4324 Int_t rc = FollowBackProlongation(*track);
4331 CookdEdxTimBin(*track);
4332 CookLabel(track,0.9);
4338 //////////////////////////////////////////////////////////////////////////////////////////
4340 void AliTRDtracker::InitLogHists() {
4342 fHBackfit = new TH1D("logTRD_backfit", "", 40, -0.5, 39.5);
4343 fHRefit = new TH1D("logTRD_refit", "", 40, -0.5, 39.5);
4344 fHClSearch = new TH1D("logTRD_clSearch", "", 60, -0.5, 59.5);
4346 fHX = new TH1D("logTRD_X", ";x (cm)", 200, 50, 400);
4347 fHNCl = new TH1D("logTRD_ncl", "", 40, -0.5, 39.5);
4348 fHNClTrack = new TH1D("logTRD_nclTrack", "", 180, -0.5, 179.5);
4350 fHMinYPos = new TH1D("logTRD_minYPos", ";#delta Y (cm)", 400, -6, 6);
4351 fHMinYNeg = new TH1D("logTRD_minYNeg", ";#delta Y (cm)", 400, -6, 6);
4352 fHMinZ = new TH1D("logTRD_minZ", ";#delta Z (cm)", 400, -20, 20);
4353 fHMinD = new TH2D("logTRD_minD", ";#delta Y (cm);#delta Z (cm)", 100, -6, 6, 100, -50, 50);
4355 fHDeltaX = new TH1D("logTRD_deltaX", ";#delta X (cm)", 100, -5, 5);
4356 fHXCl = new TH1D("logTRD_xCl", ";cluster x position (cm)", 1000, 280, 380);
4358 const char *nameFindCl[4] = {"logTRD_clY", "logTRD_clZ", "logTRD_clB", "logTRD_clG"};
4360 for(int i=0; i<4; i++) {
4361 fHFindCl[i] = new TH1D(nameFindCl[i], "", 30, -0.5, 29.5);
4365 //////////////////////////////////////////////////////////////////////////////////////////
4367 void AliTRDtracker::SaveLogHists() {
4369 TDirectory *sav = gDirectory;
4372 TSeqCollection *col = gROOT->GetListOfFiles();
4373 int N = col->GetEntries();
4374 for(int i=0; i<N; i++) {
4375 logFile = (TFile*)col->At(i);
4376 if (strstr(logFile->GetName(), "AliESDs.root")) break;
4380 fHBackfit->Write(fHBackfit->GetName(), TObject::kOverwrite);
4381 fHRefit->Write(fHRefit->GetName(), TObject::kOverwrite);
4382 fHClSearch->Write(fHClSearch->GetName(), TObject::kOverwrite);
4383 fHX->Write(fHX->GetName(), TObject::kOverwrite);
4384 fHNCl->Write(fHNCl->GetName(), TObject::kOverwrite);
4385 fHNClTrack->Write(fHNClTrack->GetName(), TObject::kOverwrite);
4387 fHMinYPos->Write(fHMinYPos->GetName(), TObject::kOverwrite);
4388 fHMinYNeg->Write(fHMinYNeg->GetName(), TObject::kOverwrite);
4389 fHMinD->Write(fHMinD->GetName(), TObject::kOverwrite);
4390 fHMinZ->Write(fHMinZ->GetName(), TObject::kOverwrite);
4392 fHDeltaX->Write(fHDeltaX->GetName(), TObject::kOverwrite);
4393 fHXCl->Write(fHXCl->GetName(), TObject::kOverwrite);
4396 for(int i=0; i<4; i++)
4397 fHFindCl[i]->Write(fHFindCl[i]->GetName(), TObject::kOverwrite);
4404 //////////////////////////////////////////////////////////////////////////////////////////