1 /**************************************************************************
2 * Copyright(c) 1998-2003, 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 **************************************************************************/
15 ////////////////////////////////////////////////////////////////////////////
16 // Implementation of the ITS clusterer V2 class //
18 // Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch //
20 ///////////////////////////////////////////////////////////////////////////
24 #include "AliITSClusterFinderV2SDD.h"
25 #include "AliITSRecPoint.h"
26 #include "AliITSDetTypeRec.h"
27 #include "AliRawReader.h"
28 #include "AliITSRawStreamSDDv3.h"
29 #include "AliITSCalibrationSDD.h"
30 #include "AliITSDetTypeRec.h"
31 #include "AliITSsegmentationSDD.h"
32 #include <TClonesArray.h>
33 #include "AliITSdigitSDD.h"
35 ClassImp(AliITSClusterFinderV2SDD)
37 AliITSClusterFinderV2SDD::AliITSClusterFinderV2SDD(AliITSDetTypeRec* dettyp):AliITSClusterFinderV2(dettyp),
52 void AliITSClusterFinderV2SDD::FindRawClusters(Int_t mod){
56 FindClustersSDD(fDigits);
60 void AliITSClusterFinderV2SDD::FindClustersSDD(TClonesArray *digits) {
61 //------------------------------------------------------------
62 // Actual SDD cluster finder
63 //------------------------------------------------------------
64 Int_t kNzBins = fNzSDD + 2;
65 const Int_t kMAXBIN=kNzBins*(fNySDD+2);
68 bins[0]=new AliBin[kMAXBIN];
69 bins[1]=new AliBin[kMAXBIN];
70 AliITSCalibrationSDD* cal = (AliITSCalibrationSDD*)GetResp(fModule);
73 Int_t i, ndigits=digits->GetEntriesFast();
74 for (i=0; i<ndigits; i++) {
75 d=(AliITSdigitSDD*)digits->UncheckedAt(i);
76 Float_t baseline = cal->GetBaseline(d->GetCoord1());
78 Int_t y=d->GetCoord2()+1; //y
79 Int_t z=d->GetCoord1()+1; //z
80 Int_t q=d->GetSignal();
82 if(q>baseline) q-=(Int_t)baseline;
84 if(q<cal->GetThresholdAnode(d->GetCoord1())) continue;
89 bins[0][y*kNzBins+z].SetQ(q);
90 bins[0][y*kNzBins+z].SetMask(1);
91 bins[0][y*kNzBins+z].SetIndex(i);
94 bins[1][y*kNzBins+z].SetQ(q);
95 bins[1][y*kNzBins+z].SetMask(1);
96 bins[1][y*kNzBins+z].SetIndex(i);
100 FindClustersSDD(bins, kMAXBIN, kNzBins, digits);
107 void AliITSClusterFinderV2SDD::
108 FindClustersSDD(AliBin* bins[2], Int_t nMaxBin, Int_t nzBins,
109 TClonesArray *digits, TClonesArray *clusters) {
110 //------------------------------------------------------------
111 // Actual SDD cluster finder
112 //------------------------------------------------------------
113 AliITSCalibrationSDD* cal = (AliITSCalibrationSDD*)GetResp(fModule);
115 TClonesArray &cl=*clusters;
116 for (Int_t s=0; s<2; s++)
117 for (Int_t i=0; i<nMaxBin; i++) {
118 if (bins[s][i].IsUsed()) continue;
119 Int_t idx[32]; UInt_t msk[32]; Int_t npeaks=0;
120 FindPeaks(i, nzBins, bins[s], idx, msk, npeaks);
122 if (npeaks>30) continue;
123 if (npeaks==0) continue;
126 for (k=0; k<npeaks-1; k++){//mark adjacent peaks
127 if (idx[k] < 0) continue; //this peak is already removed
128 for (l=k+1; l<npeaks; l++) {
129 if (idx[l] < 0) continue; //this peak is already removed
130 Int_t ki=idx[k]/nzBins, kj=idx[k] - ki*nzBins;
131 Int_t li=idx[l]/nzBins, lj=idx[l] - li*nzBins;
132 Int_t di=TMath::Abs(ki - li);
133 Int_t dj=TMath::Abs(kj - lj);
134 if (di>1 || dj>1) continue;
135 if (bins[s][idx[k]].GetQ() > bins[s][idx[l]].GetQ()) {
146 for (k=0; k<npeaks; k++) {
147 MarkPeak(TMath::Abs(idx[k]), nzBins, bins[s], msk[k]);
150 for (k=0; k<npeaks; k++) {
151 if (idx[k] < 0) continue; //removed peak
153 MakeCluster(idx[k], nzBins, bins[s], msk[k], c);
156 for (Int_t ilab=0;ilab<10;ilab++){
159 Int_t maxi=0,mini=0,maxj=0,minj=0;
160 //AliBin *bmax=&bins[s][idx[k]];
161 //Float_t max = TMath::Max(TMath::Abs(bmax->GetQ())/5.,3.);
163 for (Int_t di=-2; di<=2;di++)
164 for (Int_t dj=-3;dj<=3;dj++){
165 Int_t index = idx[k]+di+dj*nzBins;
166 if (index<0) continue;
167 if (index>=nMaxBin) continue;
168 AliBin *b=&bins[s][index];
169 if (TMath::Abs(b->GetQ())>max){
170 if (di>maxi) maxi=di;
171 if (di<mini) mini=di;
172 if (dj>maxj) maxj=dj;
173 if (dj<minj) minj=dj;
176 if (TMath::Abs(di)<2&&TMath::Abs(dj)<2){
177 AliITSdigitSDD* d=(AliITSdigitSDD*)digits->UncheckedAt(b->GetIndex());
178 for (Int_t itrack=0;itrack<10;itrack++){
179 Int_t track = (d->GetTracks())[itrack];
181 AddLabel(milab, track);
190 Float_t s2 = c.GetSigmaY2()/c.GetQ() - c.GetY()*c.GetY();
191 Float_t w=par->GetPadPitchWidth(sec);
194 c.SetSigmaY2(c.GetSigmaY2()*0.108);
195 if (sec<par->GetNInnerSector()) c.SetSigmaY2(c.GetSigmaY2()*2.07);
197 s2 = c.GetSigmaZ2()/c.GetQ() - c.GetZ()*c.GetZ();
202 c.SetSigmaZ2(c.GetSigmaZ2()*0.169);
203 if (sec<par->GetNInnerSector()) c.SetSigmaZ2(c.GetSigmaZ2()*1.77);
207 Float_t y=c.GetY(),z=c.GetZ(), q=c.GetQ();
210 //Float_t s2 = c.GetSigmaY2()/c.GetQ() - y*y;
212 //s2 = c.GetSigmaZ2()/c.GetQ() - z*z;
217 //y=(y-0.5)*fYpitchSDD;
219 //y-=fYoffSDD; //delay ?
222 z=(z-0.5)*fZpitchSDD;
225 // y=-(-y+fYshift[fModule]);
226 // z= -z+fZshift[fModule];
229 Float_t timebin = GetSeg()->Dpx(0);
230 Float_t xdet = cal->GetDriftPath((yyyy-0.5)*timebin,0);
231 xdet=xdet/10000.-fHwSDD-fYoffSDD;
234 CorrectPosition(zdet,xdet);
236 y=-(-xdet+fYshift[fModule]);
237 z= -zdet+fZshift[fModule];
239 q/=12.7; //this WAS consistent with SSD. To be reassessed
241 Float_t hit[5] = {y, z, 0.0030*0.0030, 0.0020*0.0020, q};
242 Int_t info[3] = {maxj-minj+1, maxi-mini+1, fNlayer[fModule]};
244 //if (c.GetQ() < 20.) continue; //noise cluster
247 // AliBin *b=&bins[s][idx[k]];
248 // AliITSdigitSDD* d=(AliITSdigitSDD*)digits->UncheckedAt(b->GetIndex());
251 //lab[0]=(d->GetTracks())[0];
252 //lab[1]=(d->GetTracks())[1];
253 //lab[2]=(d->GetTracks())[2];
258 milab[3]=fNdet[fModule];
260 AliITSRecPoint cc(milab,hit,info);
263 if(clusters) new (cl[ncl]) AliITSRecPoint(cc);
265 fDetTypeRec->AddRecPoint(cc);
274 void AliITSClusterFinderV2SDD::RawdataToClusters(AliRawReader* rawReader,TClonesArray** clusters){
275 //------------------------------------------------------------
276 // This function creates ITS clusters from raw data
277 //------------------------------------------------------------
279 AliITSRawStreamSDDv3 inputSDD(rawReader);
280 FindClustersSDD(&inputSDD,clusters);
284 void AliITSClusterFinderV2SDD::FindClustersSDD(AliITSRawStream* input,
285 TClonesArray** clusters)
287 //------------------------------------------------------------
288 // Actual SDD cluster finder for raw data
289 //------------------------------------------------------------
290 Int_t nClustersSDD = 0;
291 Int_t kNzBins = fNzSDD + 2;
292 Int_t kMaxBin = kNzBins * (fNySDD+2);
293 AliBin *binsSDDInit = new AliBin[kMaxBin];
294 AliBin *binsSDD1 = new AliBin[kMaxBin];
295 AliBin *binsSDD2 = new AliBin[kMaxBin];
296 AliBin* bins[2] = {NULL, NULL};
298 // read raw data input stream
300 Bool_t next = input->Next();
301 if (!next || input->IsNewModule()) {
302 Int_t iModule = input->GetPrevModuleID();
304 // when all data from a module was read, search for clusters
306 clusters[iModule] = new TClonesArray("AliITSRecPoint");
308 FindClustersSDD(bins, kMaxBin, kNzBins, NULL, clusters[iModule]);
309 Int_t nClusters = clusters[iModule]->GetEntriesFast();
310 nClustersSDD += nClusters;
311 bins[0] = bins[1] = NULL;
318 memcpy(binsSDD1,binsSDDInit,sizeof(AliBin)*kMaxBin);
319 memcpy(binsSDD2,binsSDDInit,sizeof(AliBin)*kMaxBin);
323 // fill the current digit into the bins array
324 if(input->GetSignal()>=3) {
325 Int_t iz = input->GetCoord1()+1;
326 Int_t side = ((iz <= fNzSDD) ? 0 : 1);
328 Int_t index = (input->GetCoord2()+1) * kNzBins + iz;
329 bins[side][index].SetQ(input->GetSignal());
330 bins[side][index].SetMask(1);
331 bins[side][index].SetIndex(index);
336 delete[] binsSDDInit;
338 Info("FindClustersSDD", "found clusters in ITS SDD: %d", nClustersSDD);
343 //_________________________________________________________________________
344 void AliITSClusterFinderV2SDD::CorrectPosition(Float_t &z, Float_t&y){
346 //correction of coordinates using the maps stored in the DB
348 AliITSCalibrationSDD* cal = (AliITSCalibrationSDD*)GetResp(fModule);
349 static const Int_t nbint = cal->GetMapTimeNBin();
350 static const Int_t nbina = cal->Chips()*cal->Channels();
351 Float_t stepa = (GetSeg()->Dpz(0))/10000.; //anode pitch in cm
352 Float_t stept = (GetSeg()->Dx()/cal->GetMapTimeNBin()/2.)/10.;
354 Int_t bint = TMath::Abs((Int_t)(y/stept));
355 if(y>=0) bint+=(Int_t)(nbint/2.);
356 if(bint>nbint) AliError("Wrong bin number!");
358 Int_t bina = TMath::Abs((Int_t)(z/stepa));
359 if(z>=0) bina+=(Int_t)(nbina/2.);
360 if(bina>nbina) AliError("Wrong bin number!");
362 Float_t devz = cal->GetMapACell(bina,bint)/10000.;
363 Float_t devx = cal->GetMapTCell(bina,bint)/10000.;