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;
67 bins[0]=new AliBin[kMaxBin];
68 bins[1]=new AliBin[kMaxBin];
69 AliITSCalibrationSDD* cal = (AliITSCalibrationSDD*)GetResp(fModule);
71 AliError(Form("Calibration object not present for SDD module %d\n",fModule));
74 AliITSresponseSDD* res = (AliITSresponseSDD*)cal->GetResponse();
75 const char *option=res->ZeroSuppOption();
77 Int_t i, ndigits=digits->GetEntriesFast();
78 for (i=0; i<ndigits; i++) {
79 d=(AliITSdigitSDD*)digits->UncheckedAt(i);
80 Int_t ian=d->GetCoord1();
81 Int_t itb=d->GetCoord2();
83 if (ian >= nAnodes) iSide=1;
84 Float_t gain=cal->GetChannelGain(ian);
85 Float_t charge=d->GetSignal();
86 if(strstr(option,"ZS")) charge+=(Float_t)cal->GetZSLowThreshold(iSide);
87 Float_t baseline = cal->GetBaseline(ian);
88 if(charge>baseline) charge-=baseline;
91 if(gain>0.){ // Bad channels have gain=0.
93 if(charge<cal->GetThresholdAnode(ian)) continue;
94 Int_t q=(Int_t)(charge+0.5);
98 bins[0][y*nzBins+z].SetQ(q);
99 bins[0][y*nzBins+z].SetMask(1);
100 bins[0][y*nzBins+z].SetIndex(i);
103 bins[1][y*nzBins+z].SetQ(q);
104 bins[1][y*nzBins+z].SetMask(1);
105 bins[1][y*nzBins+z].SetIndex(i);
110 FindClustersSDD(bins, kMaxBin, nzBins, digits);
117 void AliITSClusterFinderV2SDD::
118 FindClustersSDD(AliBin* bins[2], Int_t nMaxBin, Int_t nzBins,
119 TClonesArray *digits, TClonesArray *clusters) {
120 //------------------------------------------------------------
121 // Actual SDD cluster finder
122 //------------------------------------------------------------
124 const TGeoHMatrix *mT2L=AliITSgeomTGeo::GetTracking2LocalMatrix(fModule);
125 AliITSCalibrationSDD* cal = (AliITSCalibrationSDD*)GetResp(fModule);
127 AliError(Form("Calibration object not present for SDD module %d\n",fModule));
131 TClonesArray &cl=*clusters;
132 for (Int_t s=0; s<2; s++)
133 for (Int_t i=0; i<nMaxBin; i++) {
134 NoiseSuppress(i,s,nzBins,bins[s],cal);
135 if (bins[s][i].IsUsed()) continue;
136 Int_t idx[32]; UInt_t msk[32]; Int_t npeaks=0;
137 FindPeaks(i, nzBins, bins[s], idx, msk, npeaks);
139 if (npeaks>30) continue;
140 if (npeaks==0) continue;
143 for (k=0; k<npeaks-1; k++){//mark adjacent peaks
144 if (idx[k] < 0) continue; //this peak is already removed
145 for (l=k+1; l<npeaks; l++) {
146 if (idx[l] < 0) continue; //this peak is already removed
147 Int_t ki=idx[k]/nzBins, kj=idx[k] - ki*nzBins;
148 Int_t li=idx[l]/nzBins, lj=idx[l] - li*nzBins;
149 Int_t di=TMath::Abs(ki - li);
150 Int_t dj=TMath::Abs(kj - lj);
151 if (di>1 || dj>1) continue;
152 if (bins[s][idx[k]].GetQ() > bins[s][idx[l]].GetQ()) {
163 for (k=0; k<npeaks; k++) {
164 MarkPeak(TMath::Abs(idx[k]), nzBins, bins[s], msk[k]);
167 for (k=0; k<npeaks; k++) {
168 if (idx[k] < 0) continue; //removed peak
170 MakeCluster(idx[k], nzBins, bins[s], msk[k], c);
173 for (Int_t ilab=0;ilab<10;ilab++){
176 Int_t maxi=0,mini=0,maxj=0,minj=0;
177 //AliBin *bmax=&bins[s][idx[k]];
178 //Float_t max = TMath::Max(TMath::Abs(bmax->GetQ())/5.,3.);
180 for (Int_t di=-2; di<=2;di++){
181 for (Int_t dj=-3;dj<=3;dj++){
182 Int_t index = idx[k]+di+dj*nzBins;
183 if (index<0) continue;
184 if (index>=nMaxBin) continue;
185 AliBin *b=&bins[s][index];
186 Int_t nAnode=index%nzBins-1;
187 Int_t adcSignal=b->GetQ();
188 if(adcSignal>cal->GetThresholdAnode(nAnode)){
189 if (di>maxi) maxi=di;
190 if (di<mini) mini=di;
191 if (dj>maxj) maxj=dj;
192 if (dj<minj) minj=dj;
196 if (TMath::Abs(di)<2&&TMath::Abs(dj)<2){
197 AliITSdigitSDD* d=(AliITSdigitSDD*)digits->UncheckedAt(b->GetIndex());
198 for (Int_t itrack=0;itrack<10;itrack++){
199 Int_t track = (d->GetTracks())[itrack];
201 AddLabel(milab, track);
210 Float_t y=c.GetY(),z=c.GetZ(), q=c.GetQ();
212 Float_t zAnode=z-0.5; // to have anode in range 0.-255. and centered on the mid of the pitch
213 Float_t timebin=y-0.5; // to have time bin in range 0.-255. amd centered on the mid of the bin
214 if(s==1) zAnode += GetSeg()->NpzHalf(); // right side has anodes from 256. to 511.
215 Float_t zdet = GetSeg()->GetLocalZFromAnode(zAnode);
216 Float_t driftTime = GetSeg()->GetDriftTimeFromTb(timebin) - cal->GetTimeOffset();
217 Float_t driftPathMicron = cal->GetDriftPath(driftTime,zAnode);
218 const Double_t kMicronTocm = 1.0e-4;
219 Float_t xdet=(driftPathMicron-GetSeg()->Dx())*kMicronTocm; // xdet is negative
220 if (s==0) xdet=-xdet; // left side has positive local x
222 Float_t corrx=0, corrz=0;
223 cal->GetCorrections(zdet,xdet,corrz,corrx,GetSeg());
227 Double_t loc[3]={xdet,0.,zdet},trk[3]={0.,0.,0.};
228 mT2L->MasterToLocal(loc,trk);
232 q/=cal->GetADC2keV(); //to have MPV 1 MIP = 86.4 KeV
233 Float_t hit[5] = {y, z, 0.0030*0.0030, 0.0020*0.0020, q};
234 Int_t info[3] = {maxj-minj+1, maxi-mini+1, fNlayer[fModule]};
236 // AliBin *b=&bins[s][idx[k]];
237 // AliITSdigitSDD* d=(AliITSdigitSDD*)digits->UncheckedAt(b->GetIndex());
240 //lab[0]=(d->GetTracks())[0];
241 //lab[1]=(d->GetTracks())[1];
242 //lab[2]=(d->GetTracks())[2];
247 milab[3]=fNdet[fModule];
249 AliITSRecPoint cc(milab,hit,info);
251 if(clusters) new (cl[ncl]) AliITSRecPoint(cc);
253 fDetTypeRec->AddRecPoint(cc);
260 //______________________________________________________________________
261 void AliITSClusterFinderV2SDD::RawdataToClusters(AliRawReader* rawReader,TClonesArray** clusters){
262 //------------------------------------------------------------
263 // This function creates ITS clusters from raw data
264 //------------------------------------------------------------
266 AliITSRawStreamSDD inputSDD(rawReader);
267 AliITSDDLModuleMapSDD *ddlmap=(AliITSDDLModuleMapSDD*)fDetTypeRec->GetDDLModuleMapSDD();
268 inputSDD.SetDDLModuleMap(ddlmap);
269 FindClustersSDD(&inputSDD,clusters);
273 void AliITSClusterFinderV2SDD::FindClustersSDD(AliITSRawStream* input,
274 TClonesArray** clusters)
276 //------------------------------------------------------------
277 // Actual SDD cluster finder for raw data
278 //------------------------------------------------------------
279 Int_t nClustersSDD = 0;
280 Int_t nAnodes = GetSeg()->NpzHalf();
281 Int_t nzBins = nAnodes+2;
282 Int_t nTimeBins = GetSeg()->Npx();
283 Int_t nxBins = nTimeBins+2;
284 const Int_t kMaxBin=nzBins*nxBins;
286 AliBin *ddlbins[kHybridsPerDDL]; // 12 modules (=24 hybrids) of 1 DDL read "in parallel"
287 for(Int_t iHyb=0;iHyb<kHybridsPerDDL;iHyb++) ddlbins[iHyb]=new AliBin[kMaxBin];
288 // read raw data input stream
289 while (input->Next()) {
290 Int_t iModule = input->GetModuleID();
292 AliWarning(Form("Invalid SDD module number %d\n", iModule));
296 Int_t iCarlos =((AliITSRawStreamSDD*)input)->GetCarlosId();
297 Int_t iSide = ((AliITSRawStreamSDD*)input)->GetChannel();
298 Int_t iHybrid=iCarlos*2+iSide;
299 if (input->IsCompletedModule()) {
300 // when all data from a module was read, search for clusters
302 AliWarning(Form("Invalid SDD carlos number %d on module %d\n", iCarlos,iModule));
305 clusters[iModule] = new TClonesArray("AliITSRecPoint");
307 bins[0]=ddlbins[iCarlos*2]; // first hybrid of the completed module
308 bins[1]=ddlbins[iCarlos*2+1]; // second hybrid of the completed module
309 FindClustersSDD(bins, kMaxBin, nzBins, NULL, clusters[iModule]);
310 Int_t nClusters = clusters[iModule]->GetEntriesFast();
311 nClustersSDD += nClusters;
312 for(Int_t iBin=0;iBin<kMaxBin; iBin++){
313 ddlbins[iCarlos*2][iBin].Reset();
314 ddlbins[iCarlos*2+1][iBin].Reset();
317 // fill the current digit into the bins array
318 if(iHybrid<0 || iHybrid>=kHybridsPerDDL){
319 AliWarning(Form("Invalid SDD hybrid number %d on module %d\n", iHybrid,iModule));
322 AliITSCalibrationSDD* cal = (AliITSCalibrationSDD*)GetResp(iModule);
324 AliError(Form("Calibration object not present for SDD module %d\n",iModule));
327 AliITSresponseSDD* res = (AliITSresponseSDD*)cal->GetResponse();
328 const char *option=res->ZeroSuppOption();
329 Float_t charge=input->GetSignal();
330 Int_t chan=input->GetCoord1()+nAnodes*iSide;
331 Float_t gain=cal->GetChannelGain(chan);
332 if(strstr(option,"ZS")) charge+=(Float_t)cal->GetZSLowThreshold(iSide);
333 Float_t baseline = cal->GetBaseline(chan);
334 if(charge>baseline) charge-=baseline;
336 if(gain>0.){ // Bad channels have gain=0
338 if(charge>=cal->GetThresholdAnode(chan)) {
339 Int_t q=(Int_t)(charge+0.5);
340 Int_t iz = input->GetCoord1();
341 Int_t itb = input->GetCoord2();
342 Int_t index = (itb+1) * nzBins + (iz+1);
344 ddlbins[iHybrid][index].SetQ(q);
345 ddlbins[iHybrid][index].SetMask(1);
346 ddlbins[iHybrid][index].SetIndex(index);
348 AliWarning(Form("Invalid SDD cell: Anode=%d TimeBin=%d",iz,itb));
354 for(Int_t iHyb=0;iHyb<kHybridsPerDDL;iHyb++) delete [] ddlbins[iHyb];
355 Info("FindClustersSDD", "found clusters in ITS SDD: %d", nClustersSDD);
358 //______________________________________________________________________
359 void AliITSClusterFinderV2SDD::NoiseSuppress(Int_t k, Int_t sid,Int_t nzBins, AliBin* bins, AliITSCalibrationSDD* cal) const {
360 // applies zero suppression using the measured noise of each anode
361 // threshold values from ALICE-INT-1999-28 V10
366 Int_t iAn=(k%nzBins)-1;
367 if(iAn<0 || iAn>255) return;
369 Int_t nLow=0, nHigh=0;
370 Float_t noise=cal->GetNoiseAfterElectronics(iAn);
371 Float_t noisem1=noise;
372 if(iAn>1) noisem1=cal->GetNoiseAfterElectronics(iAn-1);
373 Float_t noisep1=noise;
374 if(iAn<511) noisep1=cal->GetNoiseAfterElectronics(iAn+1);
375 Float_t tL=noise*factL;
376 Float_t tH=noise*factH;
377 Float_t tLp1=noisep1*factL;
378 Float_t tHp1=noisep1*factH;
379 Float_t tLm1=noisem1*factL;
380 Float_t tHm1=noisem1*factH;
381 Float_t cC=bins[k].GetQ();
384 bins[k].SetMask(0xFFFFFFFE);
387 nLow++; // cC is greater than tL
389 Int_t sS=bins[k-1].GetQ();
392 Int_t nN=bins[k+1].GetQ();
395 Int_t eE=bins[k-nzBins].GetQ();
398 Int_t wW=bins[k+nzBins].GetQ();
401 if(nLow<3 || nHigh<1){
403 bins[k].SetMask(0xFFFFFFFE);