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 **************************************************************************/
18 ////////////////////////////////////////////////////////////////////////////
19 // Implementation of the ITS clusterer V2 class //
21 // Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch //
23 ///////////////////////////////////////////////////////////////////////////
27 #include <TClonesArray.h>
28 #include "AliITSClusterFinderV2SDD.h"
29 #include "AliITSRecPoint.h"
30 #include "AliITSDetTypeRec.h"
31 #include "AliRawReader.h"
32 #include "AliITSRawStreamSDD.h"
33 #include "AliITSCalibrationSDD.h"
34 #include "AliITSDetTypeRec.h"
35 #include "AliITSsegmentationSDD.h"
36 #include "AliITSdigitSDD.h"
37 #include "AliITSgeomTGeo.h"
38 ClassImp(AliITSClusterFinderV2SDD)
40 AliITSClusterFinderV2SDD::AliITSClusterFinderV2SDD(AliITSDetTypeRec* dettyp):AliITSClusterFinderV2(dettyp)
48 void AliITSClusterFinderV2SDD::FindRawClusters(Int_t mod){
52 FindClustersSDD(fDigits);
56 void AliITSClusterFinderV2SDD::FindClustersSDD(TClonesArray *digits) {
57 //------------------------------------------------------------
58 // Actual SDD cluster finder
59 //------------------------------------------------------------
60 Int_t nAnodes = GetSeg()->NpzHalf();
61 Int_t nzBins = nAnodes+2;
62 Int_t nTimeBins = GetSeg()->Npx();
63 Int_t nxBins = nTimeBins+2;
64 const Int_t kMaxBin=nzBins*(nxBins+2);
67 bins[0]=new AliBin[kMaxBin];
68 bins[1]=new AliBin[kMaxBin];
69 AliITSCalibrationSDD* cal = (AliITSCalibrationSDD*)GetResp(fModule);
70 AliITSresponseSDD* res = (AliITSresponseSDD*)cal->GetResponse();
71 const char *option=res->ZeroSuppOption();
73 Int_t i, ndigits=digits->GetEntriesFast();
74 for (i=0; i<ndigits; i++) {
75 d=(AliITSdigitSDD*)digits->UncheckedAt(i);
76 Int_t y=d->GetCoord2()+1; //y
77 Int_t z=d->GetCoord1()+1; //z
78 Int_t q=d->GetSignal();
79 if(!((strstr(option,"1D")) || (strstr(option,"2D")))){
80 Float_t baseline = cal->GetBaseline(d->GetCoord1());
81 if(q>baseline) q-=(Int_t)baseline;
84 if(q<cal->GetThresholdAnode(d->GetCoord1())) continue;
88 bins[0][y*nzBins+z].SetQ(q);
89 bins[0][y*nzBins+z].SetMask(1);
90 bins[0][y*nzBins+z].SetIndex(i);
93 bins[1][y*nzBins+z].SetQ(q);
94 bins[1][y*nzBins+z].SetMask(1);
95 bins[1][y*nzBins+z].SetIndex(i);
99 FindClustersSDD(bins, kMaxBin, nzBins, digits);
106 void AliITSClusterFinderV2SDD::
107 FindClustersSDD(AliBin* bins[2], Int_t nMaxBin, Int_t nzBins,
108 TClonesArray *digits, TClonesArray *clusters) {
109 //------------------------------------------------------------
110 // Actual SDD cluster finder
111 //------------------------------------------------------------
113 const TGeoHMatrix *mT2L=AliITSgeomTGeo::GetTracking2LocalMatrix(fModule);
114 AliITSCalibrationSDD* cal = (AliITSCalibrationSDD*)GetResp(fModule);
116 TClonesArray &cl=*clusters;
117 for (Int_t s=0; s<2; s++)
118 for (Int_t i=0; i<nMaxBin; i++) {
119 if (bins[s][i].IsUsed()) continue;
120 Int_t idx[32]; UInt_t msk[32]; Int_t npeaks=0;
121 FindPeaks(i, nzBins, bins[s], idx, msk, npeaks);
123 if (npeaks>30) continue;
124 if (npeaks==0) continue;
127 for (k=0; k<npeaks-1; k++){//mark adjacent peaks
128 if (idx[k] < 0) continue; //this peak is already removed
129 for (l=k+1; l<npeaks; l++) {
130 if (idx[l] < 0) continue; //this peak is already removed
131 Int_t ki=idx[k]/nzBins, kj=idx[k] - ki*nzBins;
132 Int_t li=idx[l]/nzBins, lj=idx[l] - li*nzBins;
133 Int_t di=TMath::Abs(ki - li);
134 Int_t dj=TMath::Abs(kj - lj);
135 if (di>1 || dj>1) continue;
136 if (bins[s][idx[k]].GetQ() > bins[s][idx[l]].GetQ()) {
147 for (k=0; k<npeaks; k++) {
148 MarkPeak(TMath::Abs(idx[k]), nzBins, bins[s], msk[k]);
151 for (k=0; k<npeaks; k++) {
152 if (idx[k] < 0) continue; //removed peak
154 MakeCluster(idx[k], nzBins, bins[s], msk[k], c);
157 for (Int_t ilab=0;ilab<10;ilab++){
160 Int_t maxi=0,mini=0,maxj=0,minj=0;
161 //AliBin *bmax=&bins[s][idx[k]];
162 //Float_t max = TMath::Max(TMath::Abs(bmax->GetQ())/5.,3.);
164 for (Int_t di=-2; di<=2;di++){
165 for (Int_t dj=-3;dj<=3;dj++){
166 Int_t index = idx[k]+di+dj*nzBins;
167 if (index<0) continue;
168 if (index>=nMaxBin) continue;
169 AliBin *b=&bins[s][index];
170 Int_t nAnode=index%nzBins-1;
171 Int_t adcSignal=b->GetQ();
172 if(adcSignal>cal->GetThresholdAnode(nAnode)){
173 if (di>maxi) maxi=di;
174 if (di<mini) mini=di;
175 if (dj>maxj) maxj=dj;
176 if (dj<minj) minj=dj;
180 if (TMath::Abs(di)<2&&TMath::Abs(dj)<2){
181 AliITSdigitSDD* d=(AliITSdigitSDD*)digits->UncheckedAt(b->GetIndex());
182 for (Int_t itrack=0;itrack<10;itrack++){
183 Int_t track = (d->GetTracks())[itrack];
185 AddLabel(milab, track);
194 Float_t y=c.GetY(),z=c.GetZ(), q=c.GetQ();
198 const Double_t kMicronTocm = 1.0e-4;
199 Float_t timeBinCenter = y-0.5;
200 Float_t zAnode=z-0.5;
201 Float_t zdet = (zAnode*GetSeg()->Dpz(0)-GetSeg()->Dz()/2.)*kMicronTocm;
202 Float_t driftTime = timeBinCenter*GetSeg()->Dpx(0) - cal->GetTimeOffset();
203 Float_t xdet = cal->GetDriftPath(driftTime,zAnode);
204 xdet=(xdet-GetSeg()->Dx())*kMicronTocm;
208 CorrectPosition(zdet,xdet);
210 Double_t loc[3]={xdet,0.,zdet},trk[3]={0.,0.,0.};
211 mT2L->MasterToLocal(loc,trk);
215 q/=cal->GetADC2keV(); //to have MPV 1 MIP = 86.4 KeV
216 Float_t hit[5] = {y, z, 0.0030*0.0030, 0.0020*0.0020, q};
217 Int_t info[3] = {maxj-minj+1, maxi-mini+1, fNlayer[fModule]};
219 // AliBin *b=&bins[s][idx[k]];
220 // AliITSdigitSDD* d=(AliITSdigitSDD*)digits->UncheckedAt(b->GetIndex());
223 //lab[0]=(d->GetTracks())[0];
224 //lab[1]=(d->GetTracks())[1];
225 //lab[2]=(d->GetTracks())[2];
230 milab[3]=fNdet[fModule];
232 AliITSRecPoint cc(milab,hit,info);
235 if(clusters) new (cl[ncl]) AliITSRecPoint(cc);
237 fDetTypeRec->AddRecPoint(cc);
247 void AliITSClusterFinderV2SDD::RawdataToClusters(AliRawReader* rawReader,TClonesArray** clusters){
248 //------------------------------------------------------------
249 // This function creates ITS clusters from raw data
250 //------------------------------------------------------------
252 AliITSRawStreamSDD inputSDD(rawReader);
253 FindClustersSDD(&inputSDD,clusters);
257 void AliITSClusterFinderV2SDD::FindClustersSDD(AliITSRawStream* input,
258 TClonesArray** clusters)
260 //------------------------------------------------------------
261 // Actual SDD cluster finder for raw data
262 //------------------------------------------------------------
263 Int_t nClustersSDD = 0;
264 Int_t nAnodes = GetSeg()->NpzHalf();
265 Int_t nzBins = nAnodes+2;
266 Int_t nTimeBins = GetSeg()->Npx();
267 Int_t nxBins = nTimeBins+2;
268 const Int_t kMaxBin=nzBins*(nxBins+2);
270 bins[0]=new AliBin[kMaxBin];
271 bins[1]=new AliBin[kMaxBin];
273 // read raw data input stream
275 Bool_t next = input->Next();
276 if (!next || input->IsCompletedModule()) {
277 // when all data from a module was read, search for clusters
278 Int_t iModule = input->GetModuleID();
279 clusters[iModule] = new TClonesArray("AliITSRecPoint");
281 FindClustersSDD(bins, kMaxBin, nzBins, NULL, clusters[iModule]);
282 Int_t nClusters = clusters[iModule]->GetEntriesFast();
283 nClustersSDD += nClusters;
284 for(Int_t iBin=0;iBin<kMaxBin; iBin++){
285 bins[0][iBin].Reset();
286 bins[1][iBin].Reset();
290 // fill the current digit into the bins array
291 AliITSCalibrationSDD* cal = (AliITSCalibrationSDD*)GetResp(input->GetModuleID());
292 AliITSresponseSDD* res = (AliITSresponseSDD*)cal->GetResponse();
293 const char *option=res->ZeroSuppOption();
294 Int_t q=input->GetSignal();
295 if(!((strstr(option,"1D")) || (strstr(option,"2D")))){
296 Float_t baseline = cal->GetBaseline(input->GetCoord1());
297 if(q>baseline) q-=(Int_t)baseline;
300 if(q>=cal->GetThresholdAnode(input->GetCoord1())) {
301 Int_t iz = input->GetCoord1()+1;
302 Int_t side = ((AliITSRawStreamSDD*)input)->GetChannel();
303 Int_t index = (input->GetCoord2()+1) * nzBins + iz;
304 bins[side][index].SetQ(q);
305 bins[side][index].SetMask(1);
306 bins[side][index].SetIndex(index);
313 Info("FindClustersSDD", "found clusters in ITS SDD: %d", nClustersSDD);
317 //_________________________________________________________________________
318 void AliITSClusterFinderV2SDD::CorrectPosition(Float_t &z, Float_t&y){
320 //correction of coordinates using the maps stored in the DB
322 AliITSCalibrationSDD* cal = (AliITSCalibrationSDD*)GetResp(fModule);
323 static const Int_t knbint = cal->GetMapTimeNBin();
324 static const Int_t knbina = cal->Chips()*cal->Channels();
325 const Double_t kMicronTocm = 1.0e-4;
326 Float_t stepa = (GetSeg()->Dpz(0))*kMicronTocm; //anode pitch in cm
327 Float_t stept = (GetSeg()->Dx()/cal->GetMapTimeNBin()/2.)/10.;
329 Int_t bint = TMath::Abs((Int_t)(y/stept));
330 if(y>=0) bint+=(Int_t)(knbint/2.);
331 if(bint>knbint) AliError("Wrong bin number!");
333 Int_t bina = TMath::Abs((Int_t)(z/stepa));
334 if(z>=0) bina+=(Int_t)(knbina/2.);
335 if(bina>knbina) AliError("Wrong bin number!");
337 Float_t devz = cal->GetMapACell(bina,bint)*kMicronTocm;
338 Float_t devx = cal->GetMapTCell(bina,bint)*kMicronTocm;