1 #ifndef ALITRDTRACKER_H
2 #define ALITRDTRACKER_H
4 /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
5 * See cxx source for full Copyright notice */
7 #include "AliTracker.h"
16 class AliTRDparameter;
21 const unsigned kMaxLayersPerSector = 1000;
22 const unsigned kMaxTimeBinIndex = 216; // (30 drift + 6 ampl) * 6 planes
23 const unsigned kMaxClusterPerTimeBin = 7000;
24 const unsigned kZones = 5;
25 const Int_t kTrackingSectors = 18;
27 class AliTRDtracker : public AliTracker {
32 AliTRDtracker(const TFile *in);
33 virtual ~AliTRDtracker();
35 Int_t Clusters2Tracks(AliESD* event);
36 Int_t PropagateBack(AliESD* event);
37 Int_t RefitInward(AliESD* event);
39 Int_t LoadClusters(TTree *cTree);
40 void UnloadClusters();
41 AliCluster *GetCluster(Int_t index) const { if (index >= fNclusters) return NULL;
42 return (AliCluster*) fClusters->UncheckedAt(index); };
43 virtual void CookLabel(AliKalmanTrack *t,Float_t wrong) const;
44 virtual void UseClusters(const AliKalmanTrack *t, Int_t from=0) const;
46 void SetAddTRDseeds() { fAddTRDseeds = kTRUE; }
47 void SetNoTilt() { fNoTilt = kTRUE; }
49 Double_t GetTiltFactor(const AliTRDcluster* c);
51 Int_t ReadClusters(TObjArray *array, TTree *in) const;
52 Int_t CookSectorIndex(Int_t gs) const { return kTrackingSectors - 1 - gs; }
53 AliTRDcluster * GetCluster(AliTRDtrack * track, Int_t plane, Int_t timebin);
54 Int_t GetLastPlane(AliTRDtrack * track); //return last updated plane
55 Int_t FindClusters(Int_t sector, Int_t t0, Int_t t1, AliTRDtrack * track, Int_t *clusters);
57 Float_t GetSeedGap() const {return fgkSeedGap;}
58 Int_t GetMaxGap() const {return fMaxGap;}
59 Int_t GetTimeBinsPerPlane() const {return fTimeBinsPerPlane;}
60 Float_t GetSeedStep() const {return fgkSeedStep;}
61 Float_t GetSeedDepth() const {return fgkSeedDepth;}
62 Float_t GetSkipDepth() const {return fgkSkipDepth;}
63 Double_t GetMaxChi2() const {return fgkMaxChi2;}
64 Float_t GetMaxSeedC() const {return fgkMaxSeedC;}
65 Float_t GetMaxSeedTan() const {return fgkMaxSeedTan;}
66 Double_t GetSeedErrorSY() const {return fgkSeedErrorSY;}
67 Double_t GetSeedErrorSY3() const {return fgkSeedErrorSY3;}
68 Double_t GetSeedErrorSZ() const {return fgkSeedErrorSZ;}
69 Float_t GetLabelFraction() const {return fgkLabelFraction;}
70 Float_t GetWideRoad() const {return fgkWideRoad;}
72 Float_t GetMinClustersInTrack() const {return fgkMinClustersInTrack;}
73 Float_t GetMinClustersInSeed() const {return fgkMinClustersInSeed;}
74 Float_t GetMaxSeedDeltaZ() const {return fgkMaxSeedDeltaZ;}
75 Float_t GetMaxSeedVertexZ() const {return fgkMaxSeedVertexZ;}
77 // x <-> timebin conversions useful in analysis macros
78 Double_t GetX(Int_t sec, Int_t plane, Int_t localTB) const;
79 Double_t GetX(Int_t sec, Int_t pl) const {
80 return fTrSec[sec]->GetLayer(pl)->GetX(); }
81 Int_t GetGlobalTimeBin(Int_t sec, Int_t plane, Int_t localTB) const {
82 return fTrSec[sec]->CookTimeBinIndex(plane,localTB); }
83 Double_t GetLayerNumber(Int_t sec, Double_t x) const {
84 return fTrSec[sec]->GetLayerNumber(x); }
86 class AliTRDpropagationLayer {
87 // ***************** internal class *******************
89 AliTRDpropagationLayer(Double_t x, Double_t dx, Double_t rho,
90 Double_t x0, Int_t tbIndex);
92 ~AliTRDpropagationLayer() {
93 if(fTimeBinIndex >= 0) { delete[] fClusters; delete[] fIndex; }
95 void InsertCluster(AliTRDcluster *c, UInt_t index);
96 operator Int_t() const {return fN;}
97 AliTRDcluster* operator[](Int_t i) {return fClusters[i];}
98 UInt_t GetIndex(Int_t i) const {return fIndex[i];}
99 Double_t GetX() const { return fX; }
100 Double_t GetdX() const { return fdX; }
101 Double_t GetRho() const { return fRho; }
102 Double_t GetX0() const { return fX0; }
103 Int_t GetTimeBinIndex() const { return fTimeBinIndex; }
104 void GetPropagationParameters(Double_t y, Double_t z,
105 Double_t &dx, Double_t &rho, Double_t &x0,
106 Bool_t &lookForCluster) const;
107 Int_t GetZone( Double_t z) const;
108 Int_t Find(Double_t y) const;
109 void SetZmax(Int_t cham, Double_t center, Double_t w)
110 { fZc[cham] = center; fZmax[cham] = w; }
111 void SetZ(Double_t* center, Double_t *w, Double_t *wsensitive);
112 void SetHoles(Bool_t* holes);
113 void SetYmax(Double_t w, Double_t wsensitive) { fYmax = w; fYmaxSensitive = wsensitive; }
114 Double_t GetYmax() const { return fYmax; }
115 Double_t GetZmax(Int_t c) const { return fZmax[c]; }
116 Double_t GetZc(Int_t c) const { return fZc[c]; }
118 void SetHole(Double_t Zmax, Double_t Ymax,
119 Double_t rho = 1.29e-3, Double_t x0 = 36.66,
120 Double_t Yc = 0, Double_t Zc = 0);
122 Bool_t IsSensitive() const {return (fTimeBinIndex>=0)? kTRUE: kFALSE;}
124 void Clear() {for(Int_t i=0; i<fN; i++) fClusters[i] = NULL; fN = 0;}
125 Bool_t IsHole(Int_t zone) const { return fIsHole[zone];}
128 Int_t fN; // this is fN
129 Int_t fSec; // sector mumber
130 AliTRDcluster **fClusters; // array of pointers to clusters
131 UInt_t *fIndex; // array of cluster indexes
132 Double_t fX; // x coordinate of the middle plane
133 Double_t fdX; // radial thickness of the time bin
134 Double_t fRho; // default density of the material
135 Double_t fX0; // default radiation length
136 Int_t fTimeBinIndex; // plane * F(local_tb)
137 Double_t fZc[kZones]; // Z position of the center for 5 active areas
138 Double_t fZmax[kZones]; // half of active area length in Z
139 Double_t fZmaxSensitive[kZones]; //sensitive area for detection Z
140 Bool_t fIsHole[kZones]; //is hole in given sector
141 Double_t fYmax; // half of active area length in Y
142 Double_t fYmaxSensitive; // half of active area length in Y
144 Bool_t fHole; // kTRUE if there is a hole in the layer
145 Double_t fHoleZc; // Z of the center of the hole
146 Double_t fHoleZmax; // half of the hole length in Z
147 Double_t fHoleYc; // Y of the center of the hole
148 Double_t fHoleYmax; // half of the hole length in Y
149 Double_t fHoleRho; // density of the gas in the hole
150 Double_t fHoleX0; // radiation length of the gas in the hole
153 class AliTRDtrackingSector {
155 AliTRDtrackingSector(AliTRDgeometry* geo, Int_t gs, AliTRDparameter* par);
156 ~AliTRDtrackingSector() { for(Int_t i=0; i<fN; i++) delete fLayers[i]; }
157 Int_t GetNumberOfLayers() const { return fN; }
158 Int_t GetNumberOfTimeBins() const;
159 Double_t GetX(Int_t pl) const { return fLayers[pl]->GetX(); }
160 void MapTimeBinLayers();
161 Int_t GetLayerNumber(Double_t x) const;
162 Int_t GetInnerTimeBin() const;
163 Int_t GetOuterTimeBin() const;
164 Int_t GetLayerNumber(Int_t tb) const {return fTimeBinIndex[tb];}
165 Float_t GetTzeroShift() const { return fTzeroShift; }
166 Int_t Find(Double_t x) const;
167 void InsertLayer(AliTRDpropagationLayer* pl);
168 // AliTRDpropagationLayer* operator[](Int_t i) { return fLayers[i]; }
169 AliTRDpropagationLayer* GetLayer(Int_t i) { return fLayers[i]; }
170 Int_t CookTimeBinIndex(Int_t plane, Int_t localTB) const;
173 Int_t fN; // total number of layers
174 AliTRDgeometry *fGeom; // geometry
175 AliTRDparameter *fPar; // parameter
176 AliTRDpropagationLayer *fLayers[kMaxLayersPerSector]; // layers
177 Int_t fTimeBinIndex[kMaxTimeBinIndex]; // time bin index
178 Float_t fTzeroShift; // T0 shift in cm
179 Int_t fGeomSector; // sector # in AliTRDgeometry
184 AliTRDgeometry *fGeom; // Pointer to TRD geometry
185 AliTRDparameter *fPar; // Pointer to TRD parameter
187 AliTRDtrackingSector *fTrSec[kTrackingSectors]; // array of tracking sectors;
188 Int_t fNclusters; // Number of clusters in TRD
189 TObjArray *fClusters; // List of clusters for all sectors
191 Int_t fNseeds; // Number of track seeds
192 TObjArray *fSeeds; // List of track seeds
194 Int_t fNtracks; // Number of reconstructed tracks
195 TObjArray *fTracks; // List of reconstructed tracks
197 Float_t fSY2corr; // Correction coefficient for
200 Float_t fSZ2corr; // Correction coefficient for
203 static const Float_t fgkSeedGap; // Distance between inner and outer
204 // time bin in seeding
205 // (fraction of all time bins)
207 static const Float_t fgkSeedStep; // Step in iterations
208 static const Float_t fgkSeedDepth; // Fraction of TRD allocated for seeding
209 static const Float_t fgkSkipDepth; // Fraction of TRD which can be skipped
210 // in track prolongation
211 Int_t fTimeBinsPerPlane; // number of sensitive timebins per plane
212 Int_t fMaxGap; // max gap (in time bins) in the track
213 // in track prolongation
215 static const Double_t fgkMaxChi2; // max increment in track chi2
217 static const Float_t fgkMinClustersInTrack; // min number of clusters in track
218 // out of total timebins
220 static const Float_t fgkMinFractionOfFoundClusters; // min found clusters
223 static const Float_t fgkMinClustersInSeed; // min fraction of clusters in seed
224 static const Float_t fgkMaxSeedDeltaZ; // max dZ in MakeSeeds
225 static const Float_t fgkMaxSeedDeltaZ12; // max abs(z1-z2) in MakeSeeds
226 static const Float_t fgkMaxSeedC; // max initial curvature in MakeSeeds
227 static const Float_t fgkMaxSeedTan; // max initial Tangens(lambda) in MakeSeeds
228 static const Float_t fgkMaxSeedVertexZ; // max vertex Z in MakeSeeds
229 static const Double_t fgkSeedErrorSY; // sy parameter in MakeSeeds
230 static const Double_t fgkSeedErrorSY3; // sy3 parameter in MakeSeeds
231 static const Double_t fgkSeedErrorSZ; // sz parameter in MakeSeeds
232 static const Float_t fgkLabelFraction; // min fraction of same label
233 static const Float_t fgkWideRoad; // max road width in FindProlongation
235 Bool_t fVocal; // Whatever...
236 Bool_t fAddTRDseeds; // Something else
238 Bool_t fNoTilt; // No tilt, or what?
239 Bool_t fHoles[5][18]; // holes
241 Bool_t AdjustSector(AliTRDtrack *track);
244 // Barrel tracks [SR, 03.04.2003]
246 static const Int_t fgkFirstPlane; // Id of the first (innermost) reference plane
247 static const Int_t fgkLastPlane; // Id of the last (outermost) reference plane
251 virtual void MakeSeeds(Int_t inner, Int_t outer, Int_t turn);
253 Int_t FollowProlongation(AliTRDtrack& t, Int_t rf);
254 Int_t FollowBackProlongation(AliTRDtrack& t);
255 Int_t Refit(AliTRDtrack& t, Int_t rf);
256 void CookdEdxTimBin(AliTRDtrack& t);
258 Int_t PropagateToTPC(AliTRDtrack& t);
259 Int_t PropagateToOuterPlane(AliTRDtrack& t, Double_t x);
261 void SetSY2corr(Float_t w) {fSY2corr = w;}
262 void SetSZ2corr(Float_t w) {fSZ2corr = w;}
263 Double_t ExpectedSigmaY2(Double_t r, Double_t tgl, Double_t pt) const;
264 Double_t ExpectedSigmaZ2(Double_t r, Double_t tgl) const;
266 ClassDef(AliTRDtracker,2) // manager base class