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 "AliITSRawStreamSDDCompressed.h"
34 #include "AliITSCalibrationSDD.h"
35 #include "AliITSresponseSDD.h"
36 #include "AliITSDetTypeRec.h"
37 #include "AliITSReconstructor.h"
38 #include "AliITSsegmentationSDD.h"
39 #include "AliITSdigitSDD.h"
40 #include "AliITSgeomTGeo.h"
42 ClassImp(AliITSClusterFinderV2SDD)
44 AliITSClusterFinderV2SDD::AliITSClusterFinderV2SDD(AliITSDetTypeRec* dettyp):AliITSClusterFinder(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 nAnodes = GetSeg()->NpzHalf();
65 Int_t nzBins = nAnodes+2;
66 Int_t nTimeBins = GetSeg()->Npx();
67 Int_t nxBins = nTimeBins+2;
68 const Int_t kMaxBin=nzBins*nxBins;
71 bins[0]=new AliBin[kMaxBin];
72 bins[1]=new AliBin[kMaxBin];
73 AliITSCalibrationSDD* cal = (AliITSCalibrationSDD*)GetResp(fModule);
75 AliError(Form("Calibration object not present for SDD module %d\n",fModule));
80 Int_t i, ndigits=digits->GetEntriesFast();
81 for (i=0; i<ndigits; i++) {
82 d=(AliITSdigitSDD*)digits->UncheckedAt(i);
83 Int_t ian=d->GetCoord1();
84 Int_t itb=d->GetCoord2();
86 if (ian >= nAnodes) iSide=1;
87 Float_t gain=cal->GetChannelGain(ian)/fDetTypeRec->GetAverageGainSDD();
88 Float_t charge=d->GetSignal(); // returns expanded signal
89 // (10 bit, low threshold already added)
90 Float_t baseline = cal->GetBaseline(ian);
91 if(charge>baseline) charge-=baseline;
94 if(gain>0.){ // Bad channels have gain=0.
96 if(charge<cal->GetThresholdAnode(ian)) continue;
97 Int_t q=(Int_t)(charge+0.5);
101 bins[0][y*nzBins+z].SetQ(q);
102 bins[0][y*nzBins+z].SetMask(1);
103 bins[0][y*nzBins+z].SetIndex(i);
106 bins[1][y*nzBins+z].SetQ(q);
107 bins[1][y*nzBins+z].SetMask(1);
108 bins[1][y*nzBins+z].SetIndex(i);
113 FindClustersSDD(bins, kMaxBin, nzBins, digits);
120 void AliITSClusterFinderV2SDD::
121 FindClustersSDD(AliBin* bins[2], Int_t nMaxBin, Int_t nzBins,
122 TClonesArray *digits, TClonesArray *clusters, Int_t jitter) {
123 //------------------------------------------------------------
124 // Actual SDD cluster finder
125 //------------------------------------------------------------
127 static AliITSRecoParam *repa = NULL;
129 repa = (AliITSRecoParam*) AliITSReconstructor::GetRecoParam();
131 repa = AliITSRecoParam::GetHighFluxParam();
132 AliWarning("Using default AliITSRecoParam class");
135 const TGeoHMatrix *mT2L=AliITSgeomTGeo::GetTracking2LocalMatrix(fModule);
136 AliITSCalibrationSDD* cal = (AliITSCalibrationSDD*)GetResp(fModule);
138 AliError(Form("Calibration object not present for SDD module %d\n",fModule));
142 TClonesArray &cl=*clusters;
143 for (Int_t s=0; s<2; s++)
144 for (Int_t i=0; i<nMaxBin; i++) {
145 if(NoiseSuppress(i,s,nzBins,bins[s],cal)) continue;
146 if (bins[s][i].IsUsed()) continue;
147 Int_t idx[32]; UInt_t msk[32]; Int_t npeaks=0;
148 FindPeaks(i, nzBins, bins[s], idx, msk, npeaks);
150 if (npeaks>30) continue;
151 if (npeaks==0) continue;
154 for (k=0; k<npeaks-1; k++){//mark adjacent peaks
155 if (idx[k] < 0) continue; //this peak is already removed
156 for (l=k+1; l<npeaks; l++) {
157 if (idx[l] < 0) continue; //this peak is already removed
158 Int_t ki=idx[k]/nzBins, kj=idx[k] - ki*nzBins;
159 Int_t li=idx[l]/nzBins, lj=idx[l] - li*nzBins;
160 Int_t di=TMath::Abs(ki - li);
161 Int_t dj=TMath::Abs(kj - lj);
162 if (di>1 || dj>1) continue;
163 if (bins[s][idx[k]].GetQ() > bins[s][idx[l]].GetQ()) {
174 for (k=0; k<npeaks; k++) {
175 if(repa->GetUseUnfoldingInClusterFinderSDD()==kFALSE) msk[k]=msk[0];
176 MarkPeak(TMath::Abs(idx[k]), nzBins, bins[s], msk[k]);
179 for (k=0; k<npeaks; k++) {
180 if (idx[k] < 0) continue; //removed peak
182 MakeCluster(idx[k], nzBins, bins[s], msk[k], c);
185 for (Int_t ilab=0;ilab<10;ilab++){
188 Int_t maxi=0,mini=0,maxj=0,minj=0;
190 for (Int_t di=-5; di<=5;di++){
191 for (Int_t dj=-10;dj<=10;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);
218 Int_t clSizAnode=maxi-mini+1;
219 Int_t clSizTb=maxj-minj+1;
220 if(repa->GetUseSDDClusterSizeSelection()){
221 if(clSizTb==1) continue; // cut common mode noise spikes
222 if(clSizAnode>3) continue; // cut common mode noise spikes
223 if(clSizTb>10) continue; // cut clusters on noisy anodes
226 AliITSresponseSDD* rsdd = fDetTypeRec->GetResponseSDD();
227 Float_t y=c.GetY(),z=c.GetZ(), q=c.GetQ();
229 Float_t zAnode=z-0.5; // to have anode in range 0.-255. and centered on the mid of the pitch
230 Float_t timebin=y-0.5; // to have time bin in range 0.-255. amd centered on the mid of the bin
231 if(s==1) zAnode += GetSeg()->NpzHalf(); // right side has anodes from 256. to 511.
232 Float_t zdet = GetSeg()->GetLocalZFromAnode(zAnode);
233 Float_t driftTimeUncorr = GetSeg()->GetDriftTimeFromTb(timebin)+jitter*rsdd->GetCarlosRXClockPeriod();
234 Float_t driftTime=driftTimeUncorr-rsdd->GetTimeZero(fModule);
235 Float_t driftSpeed = cal->GetDriftSpeedAtAnode(zAnode) + rsdd->GetDeltaVDrift(fModule);
236 Float_t driftPathMicron = driftTime*driftSpeed;
237 const Double_t kMicronTocm = 1.0e-4;
238 Float_t xdet=(driftPathMicron-GetSeg()->Dx())*kMicronTocm; // xdet is negative
239 if (s==0) xdet=-xdet; // left side has positive local x
241 if(repa->GetUseSDDCorrectionMaps()){
242 Float_t corrx=0, corrz=0;
243 cal->GetCorrections(zdet,xdet,corrz,corrx,GetSeg());
248 Double_t loc[3]={xdet,0.,zdet},trk[3]={0.,0.,0.};
249 mT2L->MasterToLocal(loc,trk);
253 q/=rsdd->GetADC2keV();
254 q+=(driftTime*rsdd->GetChargevsTime()); // correction for zero supp.
255 if(cal-> IsAMAt20MHz()) q*=2.; // account for 1/2 sampling freq.
256 if(q<repa->GetMinClusterChargeSDD()) continue; // remove noise clusters
258 Float_t hit[5] = {y, z, 0.0030*0.0030, 0.0020*0.0020, q};
259 Int_t info[3] = {clSizTb, clSizAnode, fNlayer[fModule]};
261 // AliBin *b=&bins[s][idx[k]];
262 // AliITSdigitSDD* d=(AliITSdigitSDD*)digits->UncheckedAt(b->GetIndex());
265 //lab[0]=(d->GetTracks())[0];
266 //lab[1]=(d->GetTracks())[1];
267 //lab[2]=(d->GetTracks())[2];
272 milab[3]=fNdet[fModule];
273 AliITSRecPoint cc(milab,hit,info);
275 cc.SetDriftTime(driftTimeUncorr);
276 if(clusters) new (cl[ncl]) AliITSRecPoint(cc);
278 fDetTypeRec->AddRecPoint(cc);
285 //______________________________________________________________________
286 void AliITSClusterFinderV2SDD::RawdataToClusters(AliRawReader* rawReader,TClonesArray** clusters){
287 //------------------------------------------------------------
288 // This function creates ITS clusters from raw data
289 //------------------------------------------------------------
291 AliITSRawStream* inputSDD=AliITSRawStreamSDD::CreateRawStreamSDD(rawReader);
292 AliDebug(1,Form("%s is used",inputSDD->ClassName()));
294 AliITSDDLModuleMapSDD *ddlmap=(AliITSDDLModuleMapSDD*)fDetTypeRec->GetDDLModuleMapSDD();
295 inputSDD->SetDDLModuleMap(ddlmap);
296 for(Int_t iddl=0; iddl<AliITSDDLModuleMapSDD::GetNDDLs(); iddl++){
297 for(Int_t icar=0; icar<AliITSDDLModuleMapSDD::GetNModPerDDL();icar++){
298 Int_t iMod=ddlmap->GetModuleNumber(iddl,icar);
299 if(iMod==-1) continue;
300 AliITSCalibrationSDD* cal = (AliITSCalibrationSDD*)GetResp(iMod);
302 AliError(Form("Calibration object not present for SDD module %d\n",iMod));
305 Bool_t isZeroSupp=cal->GetZeroSupp();
307 for(Int_t iSid=0; iSid<2; iSid++) inputSDD->SetZeroSuppLowThreshold(iMod-240,iSid,cal->GetZSLowThreshold(iSid));
309 for(Int_t iSid=0; iSid<2; iSid++) inputSDD->SetZeroSuppLowThreshold(iMod-240,iSid,0);
313 FindClustersSDD(inputSDD,clusters);
317 void AliITSClusterFinderV2SDD::FindClustersSDD(AliITSRawStream* input,
318 TClonesArray** clusters)
320 //------------------------------------------------------------
321 // Actual SDD cluster finder for raw data
322 //------------------------------------------------------------
323 Int_t nClustersSDD = 0;
324 Int_t nAnodes = GetSeg()->NpzHalf();
325 Int_t nzBins = nAnodes+2;
326 Int_t nTimeBins = GetSeg()->Npx();
327 Int_t nxBins = nTimeBins+2;
328 const Int_t kMaxBin=nzBins*nxBins;
330 AliBin *ddlbins[kHybridsPerDDL]; // 12 modules (=24 hybrids) of 1 DDL read "in parallel"
331 for(Int_t iHyb=0;iHyb<kHybridsPerDDL;iHyb++) ddlbins[iHyb]=new AliBin[kMaxBin];
332 Int_t vectModId[kModulesPerDDL];
333 for(Int_t iMod=0; iMod<kModulesPerDDL; iMod++) vectModId[iMod]=-1;
335 // read raw data input stream
336 while (input->Next()) {
337 Int_t iModule = input->GetModuleID();
339 AliWarning(Form("Invalid SDD module number %d\n", iModule));
342 Int_t iCarlos =input->GetCarlosId();
343 Int_t iSide = input->GetChannel();
344 Int_t iHybrid=iCarlos*2+iSide;
346 if (input->IsCompletedModule()) {
347 // store the module number
348 vectModId[iCarlos]=iModule;
350 else if (input->IsCompletedDDL()) {
351 // when all data from a DDL was read, search for clusters
352 Int_t jitter=input->GetJitter();
353 for(Int_t iMod=0; iMod<kModulesPerDDL; iMod++){
354 if(vectModId[iMod]>=0){
355 fModule = vectModId[iMod];
356 clusters[fModule] = new TClonesArray("AliITSRecPoint");
357 bins[0]=ddlbins[iMod*2]; // first hybrid of the module
358 bins[1]=ddlbins[iMod*2+1]; // second hybrid of the module
359 FindClustersSDD(bins, kMaxBin, nzBins, NULL, clusters[fModule],jitter);
360 Int_t nClusters = clusters[fModule]->GetEntriesFast();
361 nClustersSDD += nClusters;
364 for(Int_t iBin=0;iBin<kMaxBin; iBin++){
365 ddlbins[iMod*2][iBin].Reset();
366 ddlbins[iMod*2+1][iBin].Reset();
370 // fill the current digit into the bins array
371 if(iHybrid<0 || iHybrid>=kHybridsPerDDL){
372 AliWarning(Form("Invalid SDD hybrid number %d on module %d\n", iHybrid,iModule));
375 AliITSCalibrationSDD* cal = (AliITSCalibrationSDD*)GetResp(iModule);
377 AliError(Form("Calibration object not present for SDD module %d\n",iModule));
380 Float_t charge=input->GetSignal();
381 Int_t chan=input->GetCoord1()+nAnodes*iSide;
382 Float_t gain=cal->GetChannelGain(chan)/fDetTypeRec->GetAverageGainSDD();;
383 Float_t baseline = cal->GetBaseline(chan);
384 if(charge>baseline) charge-=baseline;
386 if(gain>0.){ // Bad channels have gain=0
388 if(charge>=cal->GetThresholdAnode(chan)) {
389 Int_t q=(Int_t)(charge+0.5);
390 Int_t iz = input->GetCoord1();
391 Int_t itb = input->GetCoord2();
392 Int_t index = (itb+1) * nzBins + (iz+1);
393 // if(index<kMaxBin){
394 if((itb < nTimeBins) && (iz < nAnodes)) {
395 ddlbins[iHybrid][index].SetQ(q);
396 ddlbins[iHybrid][index].SetMask(1);
397 ddlbins[iHybrid][index].SetIndex(index);
399 AliWarning(Form("Invalid SDD cell: Anode=%d TimeBin=%d",iz,itb));
405 for(Int_t iHyb=0;iHyb<kHybridsPerDDL;iHyb++) delete [] ddlbins[iHyb];
406 Info("FindClustersSDD", "found clusters in ITS SDD: %d", nClustersSDD);
409 //______________________________________________________________________
410 Bool_t AliITSClusterFinderV2SDD::NoiseSuppress(Int_t k, Int_t sid,Int_t nzBins, AliBin* bins, AliITSCalibrationSDD* cal) const {
411 // applies zero suppression using the measured noise of each anode
412 // threshold values from ALICE-INT-1999-28 V10
413 // returns kTRUE if the digit should eb noise suppressed, kFALSE if it should be kept
418 Int_t iAn=(k%nzBins)-1;
419 if(iAn<0 || iAn>255) return kTRUE;
421 Int_t nLow=0, nHigh=0;
422 Float_t noise=cal->GetNoiseAfterElectronics(iAn);
423 Float_t noisem1=noise;
424 if(iAn>1) noisem1=cal->GetNoiseAfterElectronics(iAn-1);
425 Float_t noisep1=noise;
426 if(iAn<511) noisep1=cal->GetNoiseAfterElectronics(iAn+1);
427 Float_t tL=noise*xfactL;
428 Float_t tH=noise*xfactH;
429 Float_t tLp1=noisep1*xfactL;
430 Float_t tHp1=noisep1*xfactH;
431 Float_t tLm1=noisem1*xfactL;
432 Float_t tHm1=noisem1*xfactH;
433 Int_t cC=bins[k].GetQ();
436 bins[k].SetMask(0xFFFFFFFE);
439 nLow++; // cC is greater than tL
441 Int_t sS=bins[k-1].GetQ();
444 Int_t nN=bins[k+1].GetQ();
447 Int_t eE=bins[k-nzBins].GetQ();
450 Int_t wW=bins[k+nzBins].GetQ();
453 if(nLow<3 || nHigh<1) return kTRUE;