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 "AliITSReconstructor.h"
36 #include "AliITSsegmentationSDD.h"
37 #include "AliITSdigitSDD.h"
38 #include "AliITSgeomTGeo.h"
40 ClassImp(AliITSClusterFinderV2SDD)
42 AliITSClusterFinderV2SDD::AliITSClusterFinderV2SDD(AliITSDetTypeRec* dettyp):AliITSClusterFinderV2(dettyp)
50 void AliITSClusterFinderV2SDD::FindRawClusters(Int_t mod){
54 FindClustersSDD(fDigits);
58 void AliITSClusterFinderV2SDD::FindClustersSDD(TClonesArray *digits) {
59 //------------------------------------------------------------
60 // Actual SDD cluster finder
61 //------------------------------------------------------------
62 Int_t nAnodes = GetSeg()->NpzHalf();
63 Int_t nzBins = nAnodes+2;
64 Int_t nTimeBins = GetSeg()->Npx();
65 Int_t nxBins = nTimeBins+2;
66 const Int_t kMaxBin=nzBins*nxBins;
69 bins[0]=new AliBin[kMaxBin];
70 bins[1]=new AliBin[kMaxBin];
71 AliITSCalibrationSDD* cal = (AliITSCalibrationSDD*)GetResp(fModule);
73 AliError(Form("Calibration object not present for SDD module %d\n",fModule));
78 Int_t i, ndigits=digits->GetEntriesFast();
79 for (i=0; i<ndigits; i++) {
80 d=(AliITSdigitSDD*)digits->UncheckedAt(i);
81 Int_t ian=d->GetCoord1();
82 Int_t itb=d->GetCoord2();
84 if (ian >= nAnodes) iSide=1;
85 Float_t gain=cal->GetChannelGain(ian);
86 Float_t charge=d->GetSignal(); // returns expanded signal
87 // (10 bit, low threshold already added)
88 Float_t baseline = cal->GetBaseline(ian);
89 if(charge>baseline) charge-=baseline;
92 if(gain>0.){ // Bad channels have gain=0.
94 if(charge<cal->GetThresholdAnode(ian)) continue;
95 Int_t q=(Int_t)(charge+0.5);
99 bins[0][y*nzBins+z].SetQ(q);
100 bins[0][y*nzBins+z].SetMask(1);
101 bins[0][y*nzBins+z].SetIndex(i);
104 bins[1][y*nzBins+z].SetQ(q);
105 bins[1][y*nzBins+z].SetMask(1);
106 bins[1][y*nzBins+z].SetIndex(i);
111 FindClustersSDD(bins, kMaxBin, nzBins, digits);
118 void AliITSClusterFinderV2SDD::
119 FindClustersSDD(AliBin* bins[2], Int_t nMaxBin, Int_t nzBins,
120 TClonesArray *digits, TClonesArray *clusters) {
121 //------------------------------------------------------------
122 // Actual SDD cluster finder
123 //------------------------------------------------------------
125 static AliITSRecoParam *repa = NULL;
127 repa = (AliITSRecoParam*) AliITSReconstructor::GetRecoParam();
129 repa = AliITSRecoParam::GetHighFluxParam();
130 AliWarning("Using default AliITSRecoParam class");
133 const TGeoHMatrix *mT2L=AliITSgeomTGeo::GetTracking2LocalMatrix(fModule);
134 AliITSCalibrationSDD* cal = (AliITSCalibrationSDD*)GetResp(fModule);
136 AliError(Form("Calibration object not present for SDD module %d\n",fModule));
140 TClonesArray &cl=*clusters;
141 for (Int_t s=0; s<2; s++)
142 for (Int_t i=0; i<nMaxBin; i++) {
143 NoiseSuppress(i,s,nzBins,bins[s],cal);
144 if (bins[s][i].IsUsed()) continue;
145 Int_t idx[32]; UInt_t msk[32]; Int_t npeaks=0;
146 FindPeaks(i, nzBins, bins[s], idx, msk, npeaks);
148 if (npeaks>30) continue;
149 if (npeaks==0) continue;
152 for (k=0; k<npeaks-1; k++){//mark adjacent peaks
153 if (idx[k] < 0) continue; //this peak is already removed
154 for (l=k+1; l<npeaks; l++) {
155 if (idx[l] < 0) continue; //this peak is already removed
156 Int_t ki=idx[k]/nzBins, kj=idx[k] - ki*nzBins;
157 Int_t li=idx[l]/nzBins, lj=idx[l] - li*nzBins;
158 Int_t di=TMath::Abs(ki - li);
159 Int_t dj=TMath::Abs(kj - lj);
160 if (di>1 || dj>1) continue;
161 if (bins[s][idx[k]].GetQ() > bins[s][idx[l]].GetQ()) {
172 for (k=0; k<npeaks; k++) {
173 if(repa->GetUseUnfoldingInClusterFinderSDD()==kFALSE) msk[k]=msk[0];
174 MarkPeak(TMath::Abs(idx[k]), nzBins, bins[s], msk[k]);
177 for (k=0; k<npeaks; k++) {
178 if (idx[k] < 0) continue; //removed peak
180 MakeCluster(idx[k], nzBins, bins[s], msk[k], c);
183 for (Int_t ilab=0;ilab<10;ilab++){
186 Int_t maxi=0,mini=0,maxj=0,minj=0;
187 //AliBin *bmax=&bins[s][idx[k]];
188 //Float_t max = TMath::Max(TMath::Abs(bmax->GetQ())/5.,3.);
190 for (Int_t di=-2; di<=2;di++){
191 for (Int_t dj=-3;dj<=3;dj++){
192 Int_t index = idx[k]+di+dj*nzBins;
193 if (index<0) continue;
194 if (index>=nMaxBin) continue;
195 AliBin *b=&bins[s][index];
196 Int_t nAnode=index%nzBins-1;
197 Int_t adcSignal=b->GetQ();
198 if(adcSignal>cal->GetThresholdAnode(nAnode)){
199 if (di>maxi) maxi=di;
200 if (di<mini) mini=di;
201 if (dj>maxj) maxj=dj;
202 if (dj<minj) minj=dj;
206 if (TMath::Abs(di)<2&&TMath::Abs(dj)<2){
207 AliITSdigitSDD* d=(AliITSdigitSDD*)digits->UncheckedAt(b->GetIndex());
208 for (Int_t itrack=0;itrack<10;itrack++){
209 Int_t track = (d->GetTracks())[itrack];
211 AddLabel(milab, track);
220 Float_t y=c.GetY(),z=c.GetZ(), q=c.GetQ();
222 Float_t zAnode=z-0.5; // to have anode in range 0.-255. and centered on the mid of the pitch
223 Float_t timebin=y-0.5; // to have time bin in range 0.-255. amd centered on the mid of the bin
224 if(s==1) zAnode += GetSeg()->NpzHalf(); // right side has anodes from 256. to 511.
225 Float_t zdet = GetSeg()->GetLocalZFromAnode(zAnode);
226 Float_t driftTime = GetSeg()->GetDriftTimeFromTb(timebin) - cal->GetTimeOffset();
227 Float_t driftPathMicron = cal->GetDriftPath(driftTime,zAnode);
228 const Double_t kMicronTocm = 1.0e-4;
229 Float_t xdet=(driftPathMicron-GetSeg()->Dx())*kMicronTocm; // xdet is negative
230 if (s==0) xdet=-xdet; // left side has positive local x
232 Float_t corrx=0, corrz=0;
233 cal->GetCorrections(zdet,xdet,corrz,corrx,GetSeg());
237 Double_t loc[3]={xdet,0.,zdet},trk[3]={0.,0.,0.};
238 mT2L->MasterToLocal(loc,trk);
242 q/=cal->GetADC2keV(); //to have MPV 1 MIP = 86.4 KeV
243 Float_t hit[5] = {y, z, 0.0030*0.0030, 0.0020*0.0020, q};
244 Int_t info[3] = {maxj-minj+1, maxi-mini+1, fNlayer[fModule]};
246 // AliBin *b=&bins[s][idx[k]];
247 // AliITSdigitSDD* d=(AliITSdigitSDD*)digits->UncheckedAt(b->GetIndex());
250 //lab[0]=(d->GetTracks())[0];
251 //lab[1]=(d->GetTracks())[1];
252 //lab[2]=(d->GetTracks())[2];
257 milab[3]=fNdet[fModule];
259 AliITSRecPoint cc(milab,hit,info);
261 if(clusters) new (cl[ncl]) AliITSRecPoint(cc);
263 fDetTypeRec->AddRecPoint(cc);
270 //______________________________________________________________________
271 void AliITSClusterFinderV2SDD::RawdataToClusters(AliRawReader* rawReader,TClonesArray** clusters){
272 //------------------------------------------------------------
273 // This function creates ITS clusters from raw data
274 //------------------------------------------------------------
276 AliITSRawStreamSDD inputSDD(rawReader);
277 AliITSDDLModuleMapSDD *ddlmap=(AliITSDDLModuleMapSDD*)fDetTypeRec->GetDDLModuleMapSDD();
278 inputSDD.SetDDLModuleMap(ddlmap);
279 for(Int_t iddl=0; iddl<AliITSDDLModuleMapSDD::GetNDDLs(); iddl++){
280 for(Int_t icar=0; icar<AliITSDDLModuleMapSDD::GetNModPerDDL();icar++){
281 Int_t iMod=ddlmap->GetModuleNumber(iddl,icar);
282 if(iMod==-1) continue;
283 AliITSCalibrationSDD* cal = (AliITSCalibrationSDD*)GetResp(iMod);
285 AliError(Form("Calibration object not present for SDD module %d\n",iMod));
288 AliITSresponseSDD* res = (AliITSresponseSDD*)cal->GetResponse();
289 const char *option=res->ZeroSuppOption();
290 if(strstr(option,"ZS")){
291 for(Int_t iSid=0; iSid<2; iSid++) inputSDD.SetZeroSuppLowThreshold(iMod-240,iSid,cal->GetZSLowThreshold(iSid));
293 for(Int_t iSid=0; iSid<2; iSid++) inputSDD.SetZeroSuppLowThreshold(iMod-240,iSid,0);
297 FindClustersSDD(&inputSDD,clusters);
301 void AliITSClusterFinderV2SDD::FindClustersSDD(AliITSRawStream* input,
302 TClonesArray** clusters)
304 //------------------------------------------------------------
305 // Actual SDD cluster finder for raw data
306 //------------------------------------------------------------
307 Int_t nClustersSDD = 0;
308 Int_t nAnodes = GetSeg()->NpzHalf();
309 Int_t nzBins = nAnodes+2;
310 Int_t nTimeBins = GetSeg()->Npx();
311 Int_t nxBins = nTimeBins+2;
312 const Int_t kMaxBin=nzBins*nxBins;
314 AliBin *ddlbins[kHybridsPerDDL]; // 12 modules (=24 hybrids) of 1 DDL read "in parallel"
315 for(Int_t iHyb=0;iHyb<kHybridsPerDDL;iHyb++) ddlbins[iHyb]=new AliBin[kMaxBin];
316 // read raw data input stream
317 while (input->Next()) {
318 Int_t iModule = input->GetModuleID();
320 AliWarning(Form("Invalid SDD module number %d\n", iModule));
324 Int_t iCarlos =((AliITSRawStreamSDD*)input)->GetCarlosId();
325 Int_t iSide = ((AliITSRawStreamSDD*)input)->GetChannel();
326 Int_t iHybrid=iCarlos*2+iSide;
327 if (input->IsCompletedModule()) {
328 // when all data from a module was read, search for clusters
330 AliWarning(Form("Invalid SDD carlos number %d on module %d\n", iCarlos,iModule));
333 clusters[iModule] = new TClonesArray("AliITSRecPoint");
335 bins[0]=ddlbins[iCarlos*2]; // first hybrid of the completed module
336 bins[1]=ddlbins[iCarlos*2+1]; // second hybrid of the completed module
337 FindClustersSDD(bins, kMaxBin, nzBins, NULL, clusters[iModule]);
338 Int_t nClusters = clusters[iModule]->GetEntriesFast();
339 nClustersSDD += nClusters;
340 for(Int_t iBin=0;iBin<kMaxBin; iBin++){
341 ddlbins[iCarlos*2][iBin].Reset();
342 ddlbins[iCarlos*2+1][iBin].Reset();
345 // fill the current digit into the bins array
346 if(iHybrid<0 || iHybrid>=kHybridsPerDDL){
347 AliWarning(Form("Invalid SDD hybrid number %d on module %d\n", iHybrid,iModule));
350 AliITSCalibrationSDD* cal = (AliITSCalibrationSDD*)GetResp(iModule);
352 AliError(Form("Calibration object not present for SDD module %d\n",iModule));
355 Float_t charge=input->GetSignal();
356 Int_t chan=input->GetCoord1()+nAnodes*iSide;
357 Float_t gain=cal->GetChannelGain(chan);
358 Float_t baseline = cal->GetBaseline(chan);
359 if(charge>baseline) charge-=baseline;
361 if(gain>0.){ // Bad channels have gain=0
363 if(charge>=cal->GetThresholdAnode(chan)) {
364 Int_t q=(Int_t)(charge+0.5);
365 Int_t iz = input->GetCoord1();
366 Int_t itb = input->GetCoord2();
367 Int_t index = (itb+1) * nzBins + (iz+1);
369 ddlbins[iHybrid][index].SetQ(q);
370 ddlbins[iHybrid][index].SetMask(1);
371 ddlbins[iHybrid][index].SetIndex(index);
373 AliWarning(Form("Invalid SDD cell: Anode=%d TimeBin=%d",iz,itb));
379 for(Int_t iHyb=0;iHyb<kHybridsPerDDL;iHyb++) delete [] ddlbins[iHyb];
380 Info("FindClustersSDD", "found clusters in ITS SDD: %d", nClustersSDD);
383 //______________________________________________________________________
384 void AliITSClusterFinderV2SDD::NoiseSuppress(Int_t k, Int_t sid,Int_t nzBins, AliBin* bins, AliITSCalibrationSDD* cal) const {
385 // applies zero suppression using the measured noise of each anode
386 // threshold values from ALICE-INT-1999-28 V10
391 Int_t iAn=(k%nzBins)-1;
392 if(iAn<0 || iAn>255) return;
394 Int_t nLow=0, nHigh=0;
395 Float_t noise=cal->GetNoiseAfterElectronics(iAn);
396 Float_t noisem1=noise;
397 if(iAn>1) noisem1=cal->GetNoiseAfterElectronics(iAn-1);
398 Float_t noisep1=noise;
399 if(iAn<511) noisep1=cal->GetNoiseAfterElectronics(iAn+1);
400 Float_t tL=noise*xfactL;
401 Float_t tH=noise*xfactH;
402 Float_t tLp1=noisep1*xfactL;
403 Float_t tHp1=noisep1*xfactH;
404 Float_t tLm1=noisem1*xfactL;
405 Float_t tHm1=noisem1*xfactH;
406 Float_t cC=bins[k].GetQ();
409 bins[k].SetMask(0xFFFFFFFE);
412 nLow++; // cC is greater than tL
414 Int_t sS=bins[k-1].GetQ();
417 Int_t nN=bins[k+1].GetQ();
420 Int_t eE=bins[k-nzBins].GetQ();
423 Int_t wW=bins[k+nzBins].GetQ();
426 if(nLow<3 || nHigh<1){
428 bins[k].SetMask(0xFFFFFFFE);