ITS/AliITSClusterFinderSDD.cxx

   1 /**************************************************************************
   2  * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
   3  *                                                                        *
   4  * Author: The ALICE Off-line Project.                                    *
   5  * Contributors are mentioned in the code where appropriate.              *
   6  *                                                                        *
   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   $Id$
  17  */
  18 ///////////////////////////////////////////////////////////////////////////
  19 //  Cluster finder                                                       //
  20 //  for Silicon                                                          //
  21 //  Drift Detector                                                       //
  22 //////////////////////////////////////////////////////////////////////////
  23
  24
  25 #include "AliITSClusterFinderSDD.h"
  26 #include "AliITSMapA1.h"
  27 #include "AliITSRawClusterSDD.h"
  28 #include "AliITSRecPoint.h"
  29 #include "AliITSdigitSDD.h"
  30 #include "AliITSDetTypeRec.h"
  31 #include "AliITSCalibrationSDD.h"
  32 #include "AliITSsegmentationSDD.h"
  33 #include "AliITSgeom.h"
  34 #include "AliLog.h"
  35
  36 ClassImp(AliITSClusterFinderSDD)
  37
  38 //______________________________________________________________________
  39 AliITSClusterFinderSDD::AliITSClusterFinderSDD():
  40 AliITSClusterFinder(),
  41 fNclusters(0),
  42 fDAnode(0.0),
  43 fDTime(0.0),
  44 fTimeCorr(0.0),
  45 fCutAmplitude(0),
  46 fMinPeak(0),
  47 fMinCharge(0),
  48 fMinNCells(0),
  49 fMaxNCells(0){
  50     // default constructor
  51 }
  52 //______________________________________________________________________
  53 AliITSClusterFinderSDD::AliITSClusterFinderSDD(AliITSDetTypeRec* dettyp,
  54                                                TClonesArray *digits,
  55                                                TClonesArray *recp):
  56 AliITSClusterFinder(dettyp),
  57 fNclusters(0),
  58 fDAnode(0.0),
  59 fDTime(0.0),
  60 fTimeCorr(0.0),
  61 fCutAmplitude(0),
  62 fMinPeak(0),
  63 fMinCharge(0),
  64 fMinNCells(0),
  65 fMaxNCells(0){
  66     // standard constructor
  67
  68     SetDigits(digits);
  69     SetClusters(recp);
  70     SetCutAmplitude(fDetTypeRec->GetITSgeom()->GetStartSDD());
  71     SetDAnode();
  72     SetDTime();
  73     SetMinPeak((Int_t)((AliITSCalibrationSDD*)GetResp(fDetTypeRec->GetITSgeom()->GetStartSDD()))->GetNoiseAfterElectronics(0)*5);
  74     SetMinNCells();
  75     SetMaxNCells();
  76     SetTimeCorr();
  77     SetMinCharge();
  78     SetMap(new AliITSMapA1(GetSeg(),Digits(),fCutAmplitude));
  79 }
  80 //______________________________________________________________________
  81 void AliITSClusterFinderSDD::SetCutAmplitude(Int_t mod,Double_t nsigma){
  82     // set the signal threshold for cluster finder
  83     Double_t baseline,noiseAfterEl;
  84
  85     AliITSresponseSDD* res  = (AliITSresponseSDD*)((AliITSCalibrationSDD*)GetResp(mod))->GetResponse();
  86     const char *option=res->ZeroSuppOption();
  87     Int_t nanodes = GetResp(mod)->Wings()*GetResp(mod)->Channels()*GetResp(mod)->Chips();
  88     fCutAmplitude.Set(nanodes);
  89     for(Int_t ian=0;ian<nanodes;ian++){
  90       noiseAfterEl = ((AliITSCalibrationSDD*)GetResp(mod))->GetNoiseAfterElectronics(ian);
  91       if((strstr(option,"1D")) || (strstr(option,"2D"))){
  92         fCutAmplitude[ian] = (Int_t)(nsigma*noiseAfterEl);
  93       }
  94       else{
  95         baseline=GetResp(mod)->GetBaseline(ian);
  96         fCutAmplitude[ian] = (Int_t)((baseline + nsigma*noiseAfterEl));
  97       }
  98     }
  99 }
 100 //______________________________________________________________________
 101 void AliITSClusterFinderSDD::Find1DClusters(){
 102     // find 1D clusters
 103
 104     // retrieve the parameters
 105     Int_t fNofMaps       = GetSeg()->Npz();
 106     Int_t fMaxNofSamples = GetSeg()->Npx();
 107     Int_t fNofAnodes     = fNofMaps/2;
 108     Int_t dummy          = 0;
 109     Double_t fTimeStep    = GetSeg()->Dpx(dummy);
 110     Double_t fSddLength   = GetSeg()->Dx();
 111     AliITSCalibrationSDD* cal = (AliITSCalibrationSDD*)GetResp(fModule);
 112     AliITSresponseSDD* res  = (AliITSresponseSDD*)((AliITSCalibrationSDD*)GetResp(fModule))->GetResponse();
 113     const char *option=res->ZeroSuppOption();
 114
 115     // map the signal
 116     Map()->ClearMap();
 117     Map()->SetThresholdArr(fCutAmplitude);
 118     Map()->FillMap2();
 119
 120     Int_t nofFoundClusters = 0;
 121     Int_t i;
 122     Double_t **dfadc = new Double_t*[fNofAnodes];
 123     for(i=0;i<fNofAnodes;i++) dfadc[i] = new Double_t[fMaxNofSamples];
 124     Double_t fadc  = 0.;
 125     Double_t fadc1 = 0.;
 126     Double_t fadc2 = 0.;
 127     Int_t j,k,idx,l,m;
 128     for(j=0;j<2;j++) {
 129         for(k=0;k<fNofAnodes;k++) {
 130             idx = j*fNofAnodes+k;
 131             // signal (fadc) & derivative (dfadc)
 132             dfadc[k][255]=0.;
 133             for(l=0; l<fMaxNofSamples; l++) {
 134                 fadc2=(Double_t)Map()->GetSignal(idx,l);
 135                 if(l>0) fadc1=(Double_t)Map()->GetSignal(idx,l-1);
 136                 if(l>0) dfadc[k][l-1] = fadc2-fadc1;
 137             } // samples
 138         } // anodes
 139
 140         for(k=0;k<fNofAnodes;k++) {
 141             AliDebug(5,Form("Anode: %d, Wing: %d",k+1,j+1));
 142             idx = j*fNofAnodes+k;
 143             Int_t imax  = 0;
 144             Int_t imaxd = 0;
 145             Int_t it    = 0;
 146             while(it <= fMaxNofSamples-3) {
 147                 imax  = it;
 148                 imaxd = it;
 149                 // maximum of signal
 150                 Double_t fadcmax  = 0.;
 151                 Double_t dfadcmax = 0.;
 152                 Int_t lthrmina   = 1;
 153                 Int_t lthrmint   = 3;
 154                 Int_t lthra      = 1;
 155                 Int_t lthrt      = 0;
 156                 for(m=0;m<20;m++) {
 157                     Int_t id = it+m;
 158                     if(id>=fMaxNofSamples) break;
 159                     fadc=(float)Map()->GetSignal(idx,id);
 160                     if(fadc > fadcmax) { fadcmax = fadc; imax = id;}
 161                     if(fadc > (float)fCutAmplitude[idx])lthrt++;
 162                     if(dfadc[k][id] > dfadcmax) {
 163                         dfadcmax = dfadc[k][id];
 164                         imaxd    = id;
 165                     } // end if
 166                 } // end for m
 167                 it = imaxd;
 168                 if(Map()->TestHit(idx,imax) == kEmpty) {it++; continue;}
 169                 // cluster charge
 170                 Int_t tstart = it-2;
 171                 if(tstart < 0) tstart = 0;
 172                 Bool_t ilcl = 0;
 173                 if(lthrt >= lthrmint && lthra >= lthrmina) ilcl = 1;
 174                 if(ilcl) {
 175                     nofFoundClusters++;
 176                     Int_t tstop      = tstart;
 177                     Double_t dfadcmin = 10000.;
 178                     Int_t ij;
 179                     for(ij=0; ij<20; ij++) {
 180                         if(tstart+ij > 255) { tstop = 255; break; }
 181                         fadc=(float)Map()->GetSignal(idx,tstart+ij);
 182                         if((dfadc[k][tstart+ij] < dfadcmin) &&
 183                            (fadc > fCutAmplitude[idx])) {
 184                             tstop = tstart+ij+5;
 185                             if(tstop > 255) tstop = 255;
 186                             dfadcmin = dfadc[k][it+ij];
 187                         } // end if
 188                     } // end for ij
 189
 190                     Double_t clusterCharge = 0.;
 191                     Double_t clusterAnode  = k+0.5;
 192                     Double_t clusterTime   = 0.;
 193                     Int_t   clusterMult   = 0;
 194                     Double_t clusterPeakAmplitude = 0.;
 195                     Int_t its,peakpos     = -1;
 196
 197                     for(its=tstart; its<=tstop; its++) {
 198                         fadc=(float)Map()->GetSignal(idx,its);
 199                         if(!((strstr(option,"1D")) || (strstr(option,"2D")))){
 200                           Double_t baseline=GetResp(fModule)->GetBaseline(idx);
 201                           if(fadc>baseline) fadc -= baseline;
 202                           else fadc = 0.;
 203                         }
 204                         clusterCharge += fadc;
 205                         // as a matter of fact we should take the peak
 206                         // pos before FFT
 207                         // to get the list of tracks !!!
 208                         if(fadc > clusterPeakAmplitude) {
 209                             clusterPeakAmplitude = fadc;
 210                             //peakpos=Map()->GetHitIndex(idx,its);
 211                             Int_t shift = (int)(fTimeCorr/fTimeStep);
 212                             if(its>shift && its<(fMaxNofSamples-shift))
 213                                 peakpos  = Map()->GetHitIndex(idx,its+shift);
 214                             else peakpos = Map()->GetHitIndex(idx,its);
 215                             if(peakpos<0) peakpos =Map()->GetHitIndex(idx,its);
 216                         } // end if
 217                         clusterTime += fadc*its;
 218                         if(fadc > 0) clusterMult++;
 219                         if(its == tstop) {
 220                             clusterTime /= (clusterCharge/fTimeStep);   // ns
 221                             if(clusterTime>fTimeCorr) clusterTime -=fTimeCorr;
 222                             //ns
 223                         } // end if
 224                     } // end for its
 225                     Float_t theAnode=clusterAnode+j*fNofAnodes;
 226                     Double_t clusteranodePath = GetSeg()->GetLocalZFromAnode(theAnode);
 227                     Double_t clusterDriftPath = (Double_t)cal->GetDriftPath(clusterTime,clusteranodePath);
 228                     clusterDriftPath = fSddLength-clusterDriftPath;
 229                     if(clusterCharge <= 0.) break;
 230                     AliITSRawClusterSDD clust(j+1,//i
 231                                               clusterAnode,clusterTime,//ff
 232                                               clusterCharge, //f
 233                                               clusterPeakAmplitude, //f
 234                                               peakpos, //i
 235                                               0.,0.,clusterDriftPath,//fff
 236                                               clusteranodePath, //f
 237                                               clusterMult, //i
 238                                               0,0,0,0,0,0,0);//7*i
 239                     fDetTypeRec->AddCluster(1,&clust);
 240                     it = tstop;
 241                 } // ilcl
 242                 it++;
 243             } // while (samples)
 244         } // anodes
 245     } // detectors (2)
 246
 247     for(i=0;i<fNofAnodes;i++) delete[] dfadc[i];
 248     delete [] dfadc;
 249
 250     return;
 251 }
 252 //______________________________________________________________________
 253 void AliITSClusterFinderSDD::Find1DClustersE(){
 254     // find 1D clusters
 255     // retrieve the parameters
 256     Int_t fNofMaps = GetSeg()->Npz();
 257     Int_t fMaxNofSamples = GetSeg()->Npx();
 258     Int_t fNofAnodes = fNofMaps/2;
 259     Int_t dummy=0;
 260     Double_t fTimeStep = GetSeg()->Dpx( dummy );
 261     Double_t fSddLength = GetSeg()->Dx();
 262     AliITSCalibrationSDD* cal = (AliITSCalibrationSDD*)GetResp(fModule);
 263     Map()->ClearMap();
 264     Map()->SetThresholdArr( fCutAmplitude );
 265     Map()->FillMap2();
 266
 267     AliITSresponseSDD* res  = (AliITSresponseSDD*)cal->GetResponse();
 268     const char *option=res->ZeroSuppOption();
 269
 270     Int_t nClu = 0;
 271     //        cout << "Search  cluster... "<< endl;
 272     for( Int_t j=0; j<2; j++ ){
 273         for( Int_t k=0; k<fNofAnodes; k++ ){
 274             Int_t idx = j*fNofAnodes+k;
 275             Bool_t on = kFALSE;
 276             Int_t start = 0;
 277             Int_t nTsteps = 0;
 278             Double_t fmax = 0.;
 279             Int_t lmax = 0;
 280             Double_t charge = 0.;
 281             Double_t time = 0.;
 282             Double_t anode = k+0.5;
 283             Int_t peakpos = -1;
 284             for( Int_t l=0; l<fMaxNofSamples; l++ ){
 285                 Double_t fadc = (Double_t)Map()->GetSignal( idx, l );
 286                 if( fadc > 0.0 ){
 287                     if( on == kFALSE && l<fMaxNofSamples-4){
 288                         // star RawCluster (reset var.)
 289                         Double_t fadc1 = (Double_t)Map()->GetSignal( idx, l+1 );
 290                         if( fadc1 < fadc ) continue;
 291                         start = l;
 292                         fmax = 0.;
 293                         lmax = 0;
 294                         time = 0.;
 295                         charge = 0.;
 296                         on = kTRUE;
 297                         nTsteps = 0;
 298                     } // end if on...
 299                     nTsteps++ ;
 300                     if(!((strstr(option,"1D")) || (strstr(option,"2D")))){
 301                       Double_t baseline=GetResp(fModule)->GetBaseline(idx);
 302                       if( fadc > baseline ) fadc -= baseline;
 303                       else fadc=0.;
 304                     }
 305                     charge += fadc;
 306                     time += fadc*l;
 307                     if( fadc > fmax ){
 308                         fmax = fadc;
 309                         lmax = l;
 310                         Int_t shift = (Int_t)(fTimeCorr/fTimeStep + 0.5);
 311                         if( l > shift && l < (fMaxNofSamples-shift) )
 312                             peakpos = Map()->GetHitIndex( idx, l+shift );
 313                         else
 314                             peakpos = Map()->GetHitIndex( idx, l );
 315                         if( peakpos < 0) peakpos = Map()->GetHitIndex(idx,l);
 316                     } // end if fadc
 317                 }else{ // end fadc>0
 318                     if( on == kTRUE ){
 319                         if( nTsteps > 2 ){
 320                             //  min # of timesteps for a RawCluster
 321                             // Found a RawCluster...
 322                             Int_t stop = l-1;
 323                             time /= (charge/fTimeStep);   // ns
 324                                 // time = lmax*fTimeStep;   // ns
 325                             if( time > fTimeCorr ) time -= fTimeCorr;   // ns
 326                             Float_t theAnode=anode+j*fNofAnodes;
 327                             Double_t anodePath =GetSeg()->GetLocalZFromAnode(theAnode);
 328                             Double_t driftPath = (Double_t)cal->GetDriftPath(time,anode);
 329                             driftPath = fSddLength-driftPath;
 330                             AliITSRawClusterSDD clust(j+1,anode,time,charge,
 331                                                       fmax, peakpos,0.,0.,
 332                                                       driftPath,anodePath,
 333                                                       nTsteps,start,stop,
 334                                                       start, stop, 1, k, k );
 335                             fDetTypeRec->AddCluster( 1, &clust );
 336                             if(AliDebugLevel()>=5) clust.PrintInfo();
 337                             nClu++;
 338                         } // end if nTsteps
 339                         on = kFALSE;
 340                     } // end if on==kTRUE
 341                 } // end if fadc>0
 342             } // samples
 343         } // anodes
 344     } // wings
 345     AliDebug(3,Form("# Rawclusters %d",nClu));
 346     return;
 347 }
 348 //_______________________________________________________________________
 349 Int_t AliITSClusterFinderSDD::SearchPeak(Double_t *spect,Int_t xdim,Int_t zdim,
 350                                          Int_t *peakX, Int_t *peakZ,
 351                                          Double_t *peakAmp, Double_t minpeak ){
 352     // search peaks on a 2D cluster
 353     Int_t npeak = 0;    // # peaks
 354     Int_t i,j;
 355     // search peaks
 356     for( Int_t z=1; z<zdim-1; z++ ){
 357         for( Int_t x=1; x<xdim-2; x++ ){
 358             Double_t sxz = spect[x*zdim+z];
 359             Double_t sxz1 = spect[(x+1)*zdim+z];
 360             Double_t sxz2 = spect[(x-1)*zdim+z];
 361             // search a local max. in s[x,z]
 362             if( sxz < minpeak || sxz1 <= 0 || sxz2 <= 0 ) continue;
 363             if( sxz >= spect[(x+1)*zdim+z  ] && sxz >= spect[(x-1)*zdim+z  ] &&
 364                 sxz >= spect[x*zdim    +z+1] && sxz >= spect[x*zdim    +z-1] &&
 365                 sxz >= spect[(x+1)*zdim+z+1] && sxz >= spect[(x+1)*zdim+z-1] &&
 366                 sxz >= spect[(x-1)*zdim+z+1] && sxz >= spect[(x-1)*zdim+z-1] ){
 367                 // peak found
 368                 peakX[npeak] = x;
 369                 peakZ[npeak] = z;
 370                 peakAmp[npeak] = sxz;
 371                 npeak++;
 372             } // end if ....
 373         } // end for x
 374     } // end for z
 375     // search groups of peaks with same amplitude.
 376     Int_t *flag = new Int_t[npeak];
 377     for( i=0; i<npeak; i++ ) flag[i] = 0;
 378     for( i=0; i<npeak; i++ ){
 379         for( j=0; j<npeak; j++ ){
 380             if( i==j) continue;
 381             if( flag[j] > 0 ) continue;
 382             if( peakAmp[i] == peakAmp[j] &&
 383                 TMath::Abs(peakX[i]-peakX[j])<=1 &&
 384                 TMath::Abs(peakZ[i]-peakZ[j])<=1 ){
 385                 if( flag[i] == 0) flag[i] = i+1;
 386                 flag[j] = flag[i];
 387             } // end if ...
 388         } // end for j
 389     } // end for i
 390     // make average of peak groups
 391     for( i=0; i<npeak; i++ ){
 392         Int_t nFlag = 1;
 393         if( flag[i] <= 0 ) continue;
 394         for( j=0; j<npeak; j++ ){
 395             if( i==j ) continue;
 396             if( flag[j] != flag[i] ) continue;
 397             peakX[i] += peakX[j];
 398             peakZ[i] += peakZ[j];
 399             nFlag++;
 400             npeak--;
 401             for( Int_t k=j; k<npeak; k++ ){
 402                 peakX[k] = peakX[k+1];
 403                 peakZ[k] = peakZ[k+1];
 404                 peakAmp[k] = peakAmp[k+1];
 405                 flag[k] = flag[k+1];
 406             } // end for k
 407             j--;
 408         } // end for j
 409         if( nFlag > 1 ){
 410             peakX[i] /= nFlag;
 411             peakZ[i] /= nFlag;
 412         } // end fi nFlag
 413     } // end for i
 414     delete [] flag;
 415     return( npeak );
 416 }
 417 //______________________________________________________________________
 418 void AliITSClusterFinderSDD::PeakFunc( Int_t xdim, Int_t zdim, Double_t *par,
 419                                        Double_t *spe, Double_t *integral){
 420     // function used to fit the clusters
 421     // par -> parameters..
 422     // par[0]  number of peaks.
 423     // for each peak i=1, ..., par[0]
 424     //                 par[i] = Ampl.
 425     //                 par[i+1] = xpos
 426     //                 par[i+2] = zpos
 427     //                 par[i+3] = tau
 428     //                 par[i+4] = sigma.
 429     Int_t electronics = GetResp(fModule)->GetElectronics(); // 1 = PASCAL, 2 = OLA
 430     const Int_t knParam = 5;
 431     Int_t npeak = (Int_t)par[0];
 432
 433     memset( spe, 0, sizeof( Double_t )*zdim*xdim );
 434
 435     Int_t k = 1;
 436     for( Int_t i=0; i<npeak; i++ ){
 437         if( integral != 0 ) integral[i] = 0.;
 438         Double_t sigmaA2 = par[k+4]*par[k+4]*2.;
 439         Double_t t2 = par[k+3];   // PASCAL
 440         if( electronics == 2 ) { t2 *= t2; t2 *= 2; } // OLA
 441         for( Int_t z=0; z<zdim; z++ ){
 442             for( Int_t x=0; x<xdim; x++ ){
 443                 Double_t z2 = (z-par[k+2])*(z-par[k+2])/sigmaA2;
 444                 Double_t x2 = 0.;
 445                 Double_t signal = 0.;
 446                 if( electronics == 1 ){ // PASCAL
 447                     x2 = (x-par[k+1]+t2)/t2;
 448                     signal = (x2>0.) ? par[k]*x2*exp(-x2+1.-z2) :0.0; // RCCR2
 449                 //  signal =(x2>0.) ? par[k]*x2*x2*exp(-2*x2+2.-z2 ):0.0;//RCCR
 450                 }else if( electronics == 2 ) { // OLA
 451                     x2 = (x-par[k+1])*(x-par[k+1])/t2;
 452                     signal = par[k]  * exp( -x2 - z2 );
 453                 } else {
 454                     Warning("PeakFunc","Wrong SDD Electronics = %d",
 455                             electronics);
 456                     // exit( 1 );
 457                 } // end if electronicx
 458                 spe[x*zdim+z] += signal;
 459                 if( integral != 0 ) integral[i] += signal;
 460             } // end for x
 461         } // end for z
 462         k += knParam;
 463     } // end for i
 464     return;
 465 }
 466 //__________________________________________________________________________
 467 Double_t AliITSClusterFinderSDD::ChiSqr( Int_t xdim, Int_t zdim, Double_t *spe,
 468                                         Double_t *speFit ) const{
 469     // EVALUATES UNNORMALIZED CHI-SQUARED
 470     Double_t chi2 = 0.;
 471     for( Int_t z=0; z<zdim; z++ ){
 472         for( Int_t x=1; x<xdim-1; x++ ){
 473             Int_t index = x*zdim+z;
 474             Double_t tmp = spe[index] - speFit[index];
 475             chi2 += tmp*tmp;
 476         } // end for x
 477     } // end for z
 478     return( chi2 );
 479 }
 480 //_______________________________________________________________________
 481 void AliITSClusterFinderSDD::Minim( Int_t xdim, Int_t zdim, Double_t *param,
 482                                     Double_t *prm0,Double_t *steprm,
 483                                     Double_t *chisqr,Double_t *spe,
 484                                     Double_t *speFit ){
 485     //
 486     Int_t   k, nnn, mmm, i;
 487     Double_t p1, delta, d1, chisq1, p2, chisq2, t, p3, chisq3, a, b, p0, chisqt;
 488     const Int_t knParam = 5;
 489     Int_t npeak = (Int_t)param[0];
 490     for( k=1; k<(npeak*knParam+1); k++ ) prm0[k] = param[k];
 491     for( k=1; k<(npeak*knParam+1); k++ ){
 492         p1 = param[k];
 493         delta = steprm[k];
 494         d1 = delta;
 495         // ENSURE THAT STEP SIZE IS SENSIBLY LARGER THAN MACHINE ROUND OFF
 496         if( TMath::Abs( p1 ) > 1.0E-6 )
 497             if ( TMath::Abs( delta/p1 ) < 1.0E-4 ) delta = p1/1000;
 498             else  delta = (Double_t)1.0E-4;
 499         //  EVALUATE CHI-SQUARED AT FIRST TWO SEARCH POINTS
 500         PeakFunc( xdim, zdim, param, speFit );
 501         chisq1 = ChiSqr( xdim, zdim, spe, speFit );
 502         p2 = p1+delta;
 503         param[k] = p2;
 504         PeakFunc( xdim, zdim, param, speFit );
 505         chisq2 = ChiSqr( xdim, zdim, spe, speFit );
 506         if( chisq1 < chisq2 ){
 507             // REVERSE DIRECTION OF SEARCH IF CHI-SQUARED IS INCREASING
 508             delta = -delta;
 509             t = p1;
 510             p1 = p2;
 511             p2 = t;
 512             t = chisq1;
 513             chisq1 = chisq2;
 514             chisq2 = t;
 515         } // end if
 516         i = 1; nnn = 0;
 517         do {   // INCREMENT param(K) UNTIL CHI-SQUARED STARTS TO INCREASE
 518             nnn++;
 519             p3 = p2 + delta;
 520             mmm = nnn - (nnn/5)*5;  // multiplo de 5
 521             if( mmm == 0 ){
 522                 d1 = delta;
 523                 // INCREASE STEP SIZE IF STEPPING TOWARDS MINIMUM IS TOO SLOW
 524                 delta *= 5;
 525             } // end if
 526             param[k] = p3;
 527             // Constrain paramiters
 528             Int_t kpos = (k-1) % knParam;
 529             switch( kpos ){
 530             case 0 :
 531                 if( param[k] <= 20 ) param[k] = fMinPeak;
 532                 break;
 533             case 1 :
 534                 if( TMath::Abs( param[k] - prm0[k] ) > 1.5 ) param[k] = prm0[k];
 535                 break;
 536             case 2 :
 537                 if( TMath::Abs( param[k] - prm0[k] ) > 1. ) param[k] = prm0[k];
 538                 break;
 539             case 3 :
 540                 if( param[k] < .5 ) param[k] = .5;
 541                 break;
 542             case 4 :
 543                 if( param[k] < .288 ) param[k] = .288;// 1/sqrt(12) = 0.288
 544                 if( param[k] > zdim*.5 ) param[k] = zdim*.5;
 545                 break;
 546             }; // end switch
 547             PeakFunc( xdim, zdim, param, speFit );
 548             chisq3 = ChiSqr( xdim, zdim, spe, speFit );
 549             if( chisq3 < chisq2 && nnn < 50 ){
 550                 p1 = p2;
 551                 p2 = p3;
 552                 chisq1 = chisq2;
 553                 chisq2 = chisq3;
 554             }else i=0;
 555         } while( i );
 556         // FIND MINIMUM OF PARABOLA DEFINED BY LAST THREE POINTS
 557         a = chisq1*(p2-p3)+chisq2*(p3-p1)+chisq3*(p1-p2);
 558         b = chisq1*(p2*p2-p3*p3)+chisq2*(p3*p3-p1*p1)+chisq3*(p1*p1-p2*p2);
 559         if( a!=0 ) p0 = (Double_t)(0.5*b/a);
 560         else p0 = 10000;
 561         //--IN CASE OF NEARLY EQUAL CHI-SQUARED AND TOO SMALL STEP SIZE PREVENT
 562         //   ERRONEOUS EVALUATION OF PARABOLA MINIMUM
 563         //---NEXT TWO LINES CAN BE OMITTED FOR HIGHER PRECISION MACHINES
 564         //dp = (Double_t) max (TMath::Abs(p3-p2), TMath::Abs(p2-p1));
 565         //if( TMath::Abs( p2-p0 ) > dp ) p0 = p2;
 566         param[k] = p0;
 567         // Constrain paramiters
 568         Int_t kpos = (k-1) % knParam;
 569         switch( kpos ){
 570         case 0 :
 571             if( param[k] <= 20 ) param[k] = fMinPeak;
 572             break;
 573         case 1 :
 574             if( TMath::Abs( param[k] - prm0[k] ) > 1.5 ) param[k] = prm0[k];
 575             break;
 576         case 2 :
 577             if( TMath::Abs( param[k] - prm0[k] ) > 1. ) param[k] = prm0[k];
 578             break;
 579         case 3 :
 580             if( param[k] < .5 ) param[k] = .5;
 581             break;
 582         case 4 :
 583             if( param[k] < .288 ) param[k] = .288;  // 1/sqrt(12) = 0.288
 584             if( param[k] > zdim*.5 ) param[k] = zdim*.5;
 585             break;
 586         }; // end switch
 587         PeakFunc( xdim, zdim, param, speFit );
 588         chisqt = ChiSqr( xdim, zdim, spe, speFit );
 589         // DO NOT ALLOW ERRONEOUS INTERPOLATION
 590         if( chisqt <= *chisqr ) *chisqr = chisqt;
 591         else param[k] = prm0[k];
 592         // OPTIMIZE SEARCH STEP FOR EVENTUAL NEXT CALL OF MINIM
 593         steprm[k] = (param[k]-prm0[k])/5;
 594         if( steprm[k] >= d1 ) steprm[k] = d1/5;
 595     } // end for k
 596     // EVALUATE FIT AND CHI-SQUARED FOR OPTIMIZED PARAMETERS
 597     PeakFunc( xdim, zdim, param, speFit );
 598     *chisqr = ChiSqr( xdim, zdim, spe, speFit );
 599     return;
 600 }
 601 //_________________________________________________________________________
 602 Int_t AliITSClusterFinderSDD::NoLinearFit( Int_t xdim, Int_t zdim,
 603                                            Double_t *param, Double_t *spe,
 604                                            Int_t *niter, Double_t *chir ){
 605     // fit method from Comput. Phys. Commun 46(1987) 149
 606     const Double_t kchilmt = 0.01;  //        relative accuracy
 607     const Int_t   knel = 3;        //        for parabolic minimization
 608     const Int_t   knstop = 50;     //        Max. iteration number
 609     const Int_t   knParam = 5;
 610     Int_t npeak = (Int_t)param[0];
 611     // RETURN IF NUMBER OF DEGREES OF FREEDOM IS NOT POSITIVE
 612     if( (xdim*zdim - npeak*knParam) <= 0 ) return( -1 );
 613     Double_t degFree = (xdim*zdim - npeak*knParam)-1;
 614     Int_t   n, k, iterNum = 0;
 615     Double_t *prm0 = new Double_t[npeak*knParam+1];
 616     Double_t *step = new Double_t[npeak*knParam+1];
 617     Double_t *schi = new Double_t[npeak*knParam+1];
 618     Double_t *sprm[3];
 619     sprm[0] = new Double_t[npeak*knParam+1];
 620     sprm[1] = new Double_t[npeak*knParam+1];
 621     sprm[2] = new Double_t[npeak*knParam+1];
 622     Double_t  chi0, chi1, reldif, a, b, prmin, dp;
 623     Double_t *speFit = new Double_t[ xdim*zdim ];
 624     PeakFunc( xdim, zdim, param, speFit );
 625     chi0 = ChiSqr( xdim, zdim, spe, speFit );
 626     chi1 = chi0;
 627     for( k=1; k<(npeak*knParam+1); k++) prm0[k] = param[k];
 628         for( k=1 ; k<(npeak*knParam+1); k+=knParam ){
 629             step[k] = param[k] / 20.0 ;
 630             step[k+1] = param[k+1] / 50.0;
 631             step[k+2] = param[k+2] / 50.0;
 632             step[k+3] = param[k+3] / 20.0;
 633             step[k+4] = param[k+4] / 20.0;
 634         } // end for k
 635     Int_t out = 0;
 636     do{
 637         iterNum++;
 638             chi0 = chi1;
 639             Minim( xdim, zdim, param, prm0, step, &chi1, spe, speFit );
 640             reldif = ( chi1 > 0 ) ? ((Double_t) TMath::Abs( chi1-chi0)/chi1 ) : 0;
 641         // EXIT conditions
 642         if( reldif < (float) kchilmt ){
 643             *chir  = (chi1>0) ? (float) TMath::Sqrt (chi1/degFree) :0;
 644             *niter = iterNum;
 645             out = 0;
 646             break;
 647         } // end if
 648         if( (reldif < (float)(5*kchilmt)) && (iterNum > knstop) ){
 649             *chir = (chi1>0) ?(float) TMath::Sqrt (chi1/degFree):0;
 650             *niter = iterNum;
 651             out = 0;
 652             break;
 653         } // end if
 654         if( iterNum > 5*knstop ){
 655             *chir  = (chi1>0) ?(float) TMath::Sqrt (chi1/degFree):0;
 656             *niter = iterNum;
 657             out = 1;
 658             break;
 659         } // end if
 660         if( iterNum <= knel ) continue;
 661         n = iterNum - (iterNum/knel)*knel; // EXTRAPOLATION LIMIT COUNTER N
 662         if( n > 3 || n == 0 ) continue;
 663         schi[n-1] = chi1;
 664         for( k=1; k<(npeak*knParam+1); k++ ) sprm[n-1][k] = param[k];
 665         if( n != 3 ) continue;
 666         // -EVALUATE EXTRAPOLATED VALUE OF EACH PARAMETER BY FINDING MINIMUM OF
 667         //    PARABOLA DEFINED BY LAST THREE CALLS OF MINIM
 668         for( k=1; k<(npeak*knParam+1); k++ ){
 669             Double_t tmp0 = sprm[0][k];
 670             Double_t tmp1 = sprm[1][k];
 671             Double_t tmp2 = sprm[2][k];
 672             a  = schi[0]*(tmp1-tmp2) + schi[1]*(tmp2-tmp0);
 673             a += (schi[2]*(tmp0-tmp1));
 674             b  = schi[0]*(tmp1*tmp1-tmp2*tmp2);
 675             b += (schi[1]*(tmp2*tmp2-tmp0*tmp0)+(schi[2]*
 676                                              (tmp0*tmp0-tmp1*tmp1)));
 677             if ((double)a < 1.0E-6) prmin = 0;
 678             else prmin = (float) (0.5*b/a);
 679             dp = 5*(tmp2-tmp0);
 680             if( TMath::Abs(prmin-tmp2) > TMath::Abs(dp) ) prmin = tmp2+dp;
 681             param[k] = prmin;
 682             step[k]  = dp/10; // OPTIMIZE SEARCH STEP
 683         } // end for k
 684     } while( kTRUE );
 685     delete [] prm0;
 686     delete [] step;
 687     delete [] schi;
 688     delete [] sprm[0];
 689     delete [] sprm[1];
 690     delete [] sprm[2];
 691     delete [] speFit;
 692     return( out );
 693 }
 694
 695 //______________________________________________________________________
 696 void AliITSClusterFinderSDD::ResolveClusters(){
 697     // The function to resolve clusters if the clusters overlapping exists
 698     Int_t i;
 699     // get number of clusters for this module
 700     Int_t nofClusters = NClusters();
 701     nofClusters -= fNclusters;
 702     Int_t fNofMaps = GetSeg()->Npz();
 703     Int_t fNofAnodes = fNofMaps/2;
 704     //Int_t fMaxNofSamples = GetSeg()->Npx();
 705     Int_t dummy=0;
 706     Double_t fTimeStep = GetSeg()->Dpx( dummy );
 707     Double_t fSddLength = GetSeg()->Dx();
 708     Double_t anodePitch = GetSeg()->Dpz( dummy );
 709     Int_t electronics =GetResp(fModule)->GetElectronics(); // 1 = PASCAL, 2 = OLA
 710     AliITSCalibrationSDD* cal = (AliITSCalibrationSDD*)GetResp(fModule);
 711     AliITSresponseSDD* res  = (AliITSresponseSDD*)cal->GetResponse();
 712     const char *option=res->ZeroSuppOption();
 713
 714
 715     for( Int_t j=0; j<nofClusters; j++ ){
 716         // get cluster information
 717         AliITSRawClusterSDD *clusterJ=(AliITSRawClusterSDD*) Cluster(j);
 718         Int_t astart = clusterJ->Astart();
 719         Int_t astop = clusterJ->Astop();
 720         Int_t tstart = clusterJ->Tstartf();
 721         Int_t tstop = clusterJ->Tstopf();
 722         Int_t wing = (Int_t)clusterJ->W();
 723         if( wing == 2 ){
 724             astart += fNofAnodes;
 725             astop  += fNofAnodes;
 726         } // end if
 727         Int_t xdim = tstop-tstart+3;
 728         Int_t zdim = astop-astart+3;
 729         if( xdim > 50 || zdim > 30 ) {
 730             Warning("ResolveClusters","xdim: %d , zdim: %d ",xdim,zdim);
 731             continue;
 732         }
 733         Double_t *sp = new Double_t[ xdim*zdim+1 ];
 734         memset( sp, 0, sizeof(Double_t)*(xdim*zdim+1) );
 735
 736         // make a local map from cluster region
 737         for( Int_t ianode=astart; ianode<=astop; ianode++ ){
 738             for( Int_t itime=tstart; itime<=tstop; itime++ ){
 739                 Double_t fadc = Map()->GetSignal( ianode, itime );
 740                 if(!((strstr(option,"1D")) || (strstr(option,"2D")))){
 741                   Double_t baseline=GetResp(fModule)->GetBaseline(ianode);
 742                   if( fadc > baseline ) fadc -= (Double_t)baseline;
 743                   else fadc = 0.;
 744                 }
 745                 Int_t index = (itime-tstart+1)*zdim+(ianode-astart+1);
 746                 sp[index] = fadc;
 747             } // time loop
 748         } // anode loop
 749
 750         // search peaks on cluster
 751         const Int_t kNp = 150;
 752         Int_t peakX1[kNp];
 753         Int_t peakZ1[kNp];
 754         Double_t peakAmp1[kNp];
 755         Int_t npeak = SearchPeak(sp,xdim,zdim,peakX1,peakZ1,peakAmp1,fMinPeak);
 756
 757         // if multiple peaks, split cluster
 758         if( npeak >= 1 ){
 759             //        cout << "npeak " << npeak << endl;
 760             //        clusterJ->PrintInfo();
 761             Double_t *par = new Double_t[npeak*5+1];
 762             par[0] = (Double_t)npeak;
 763             // Initial parameters in cell dimentions
 764             Int_t k1 = 1;
 765             for( i=0; i<npeak; i++ ){
 766                 par[k1] = peakAmp1[i];
 767                 par[k1+1] = peakX1[i]; // local time pos. [timebin]
 768                 par[k1+2] = peakZ1[i]; // local anode pos. [anodepitch]
 769                 if( electronics == 1 ) par[k1+3] = 2.; // PASCAL
 770                 else if(electronics==2) par[k1+3] = 0.7;//tau [timebin] OLA
 771                 par[k1+4] = .4;    // sigma        [anodepich]
 772                 k1 += 5;
 773             } // end for i
 774             Int_t niter;
 775             Double_t chir;
 776             NoLinearFit( xdim, zdim, par, sp, &niter, &chir );
 777             Double_t peakX[kNp];
 778             Double_t peakZ[kNp];
 779             Double_t sigma[kNp];
 780             Double_t tau[kNp];
 781             Double_t peakAmp[kNp];
 782             Double_t integral[kNp];
 783             //get integrals => charge for each peak
 784             PeakFunc( xdim, zdim, par, sp, integral );
 785             k1 = 1;
 786             for( i=0; i<npeak; i++ ){
 787                 peakAmp[i] = par[k1];
 788                 peakX[i]   = par[k1+1];
 789                 peakZ[i]   = par[k1+2];
 790                 tau[i]     = par[k1+3];
 791                 sigma[i]   = par[k1+4];
 792                 k1+=5;
 793             } // end for i
 794             // calculate parameter for new clusters
 795             for( i=0; i<npeak; i++ ){
 796                 AliITSRawClusterSDD clusterI( *clusterJ );
 797
 798                 Int_t newAnode = peakZ1[i]-1 + astart;
 799
 800             //    Int_t newiTime = peakX1[i]-1 + tstart;
 801             //    Int_t shift = (Int_t)(fTimeCorr/fTimeStep + 0.5);
 802             //    if( newiTime > shift && newiTime < (fMaxNofSamples-shift) )
 803             //        shift = 0;
 804             //    Int_t peakpos = Map()->GetHitIndex(newAnode,newiTime+shift );
 805             //    clusterI.SetPeakPos( peakpos );
 806
 807                 clusterI.SetPeakAmpl( peakAmp1[i] );
 808                 Double_t newAnodef = peakZ[i] - 0.5 + astart;
 809                 Double_t newiTimef = peakX[i] - 1 + tstart;
 810                 if( wing == 2 ) newAnodef -= fNofAnodes;
 811                 Double_t anodePath = (newAnodef - fNofAnodes/2)*anodePitch;
 812                 newiTimef *= fTimeStep;
 813                 if( newiTimef > fTimeCorr ) newiTimef -= fTimeCorr;
 814                 if( electronics == 1 ){
 815                 //    newiTimef *= 0.999438;    // PASCAL
 816                 //    newiTimef += (6./fDriftSpeed - newiTimef/3000.);
 817                 }else if( electronics == 2 )
 818                     newiTimef *= 0.99714;    // OLA
 819
 820                 Int_t timeBin = (Int_t)(newiTimef/fTimeStep+0.5);
 821                 Int_t peakpos = Map()->GetHitIndex( newAnode, timeBin );
 822                 if( peakpos < 0 ) {
 823                     for( Int_t ii=0; ii<3; ii++ ) {
 824                         peakpos = Map()->GetHitIndex( newAnode, timeBin+ii );
 825                         if( peakpos > 0 ) break;
 826                         peakpos = Map()->GetHitIndex( newAnode, timeBin-ii );
 827                         if( peakpos > 0 ) break;
 828                     }
 829                 }
 830
 831                 if( peakpos < 0 ) {
 832                     //Warning("ResolveClusters",
 833                     //        "Digit not found for cluster");
 834                     //if(AliDebugLevel()>=3) clusterI.PrintInfo();
 835                    continue;
 836                 }
 837                 clusterI.SetPeakPos( peakpos );
 838                 Float_t dp = cal->GetDriftPath(newiTimef,newAnodef);
 839                 Float_t driftPath = fSddLength - (Double_t)dp;
 840                 Float_t sign = ( wing == 1 ) ? -1. : 1.;
 841                 Float_t xcoord = driftPath*sign * 0.0001;
 842                 Float_t zcoord = anodePath * 0.0001;
 843                 Float_t corrx=0, corrz=0;
 844                 cal->GetCorrections(zcoord,xcoord,corrz,corrx,GetSeg());
 845                 xcoord+=corrx;
 846                 zcoord+=corrz;
 847                 clusterI.SetX( xcoord );
 848                 clusterI.SetZ( zcoord );
 849                 clusterI.SetAnode( newAnodef );
 850                 clusterI.SetTime( newiTimef );
 851                 clusterI.SetAsigma( sigma[i]*anodePitch );
 852                 clusterI.SetTsigma( tau[i]*fTimeStep );
 853                 clusterI.SetQ( integral[i] );
 854
 855                 fDetTypeRec->AddCluster( 1, &clusterI );
 856             } // end for i
 857             Clusters()->RemoveAt( j );
 858             delete [] par;
 859         } else {  // something odd
 860             Warning( "ResolveClusters",
 861                      "--- Peak not found!!!!  minpeak=%d ,cluster peak= %f"
 862                      " , module= %d",
 863                      fMinPeak, clusterJ->PeakAmpl(),GetModule());
 864             clusterJ->PrintInfo();
 865             Warning( "ResolveClusters"," xdim= %d zdim= %d", xdim-2, zdim-2 );
 866         }
 867         delete [] sp;
 868     } // cluster loop
 869     Clusters()->Compress();
 870 //    Map()->ClearMap();
 871 }
 872 //________________________________________________________________________
 873 void  AliITSClusterFinderSDD::GroupClusters(){
 874     // group clusters
 875     Int_t dummy=0;
 876     Double_t fTimeStep = GetSeg()->Dpx(dummy);
 877     // get number of clusters for this module
 878     Int_t nofClusters = NClusters();
 879     nofClusters -= fNclusters;
 880     AliITSRawClusterSDD *clusterI;
 881     AliITSRawClusterSDD *clusterJ;
 882     Int_t *label = new Int_t [nofClusters];
 883     Int_t i,j;
 884     for(i=0; i<nofClusters; i++) label[i] = 0;
 885     for(i=0; i<nofClusters; i++) {
 886         if(label[i] != 0) continue;
 887         for(j=i+1; j<nofClusters; j++) {
 888             if(label[j] != 0) continue;
 889             clusterI = (AliITSRawClusterSDD*) Cluster(i);
 890             clusterJ = (AliITSRawClusterSDD*) Cluster(j);
 891             // 1.3 good
 892             if(clusterI->T() < fTimeStep*60) fDAnode = 4.2;  // TB 3.2
 893             if(clusterI->T() < fTimeStep*10) fDAnode = 1.5;  // TB 1.
 894             Bool_t pair = clusterI->Brother(clusterJ,fDAnode,fDTime);
 895             if(!pair) continue;
 896             if(AliDebugLevel()>=4){
 897                 clusterI->PrintInfo();
 898                 clusterJ->PrintInfo();
 899             } // end if AliDebugLevel
 900             clusterI->Add(clusterJ);
 901             label[j] = 1;
 902             Clusters()->RemoveAt(j);
 903             j=i; // <- Ernesto
 904         } // J clusters
 905         label[i] = 1;
 906     } // I clusters
 907     Clusters()->Compress();
 908
 909     delete [] label;
 910     return;
 911 }
 912 //________________________________________________________________________
 913 void AliITSClusterFinderSDD::SelectClusters(){
 914     // get number of clusters for this module
 915     Int_t nofClusters = NClusters();
 916
 917     nofClusters -= fNclusters;
 918     Int_t i;
 919     for(i=0; i<nofClusters; i++) {
 920         AliITSRawClusterSDD *clusterI =(AliITSRawClusterSDD*) Cluster(i);
 921         Int_t rmflg = 0;
 922         Double_t wy = 0.;
 923         if(clusterI->Anodes() != 0.) {
 924             wy = ((Double_t) clusterI->Samples())/clusterI->Anodes();
 925         } // end if
 926         Int_t amp = (Int_t) clusterI->PeakAmpl();
 927         Int_t cha = (Int_t) clusterI->Q();
 928         if(amp < fMinPeak) rmflg = 1;
 929         if(cha < fMinCharge) rmflg = 1;
 930         if(wy < fMinNCells) rmflg = 1;
 931         //if(wy > fMaxNCells) rmflg = 1;
 932         if(rmflg) Clusters()->RemoveAt(i);
 933     } // I clusters
 934     Clusters()->Compress();
 935     return;
 936 }
 937
 938 //______________________________________________________________________
 939 void AliITSClusterFinderSDD::GetRecPoints(AliITSCalibrationSDD* cal){
 940     // get rec points
 941
 942     // get number of clusters for this module
 943     Int_t nofClusters = NClusters();
 944     nofClusters -= fNclusters;
 945     const Double_t kconvGeV = 1.e-6; // GeV -> KeV
 946     const Double_t kconv = 1.0e-4;
 947     const Double_t kcmToMicrons = 10000.;
 948     const Double_t kRMSx = 38.0*kconv; // microns->cm ITS TDR Table 1.3
 949     const Double_t kRMSz = 28.0*kconv; // microns->cm ITS TDR Table 1.3
 950     Int_t nAnodes=GetSeg()->NpzHalf();
 951     Int_t i;
 952     Int_t ix, iz, idx=-1;
 953     AliITSdigitSDD *dig=0;
 954     Int_t ndigits=NDigits();
 955
 956     Int_t lay,lad,det;
 957     fDetTypeRec->GetITSgeom()->GetModuleId(fModule,lay,lad,det);
 958     Int_t ind=(lad-1)*fDetTypeRec->GetITSgeom()->GetNdetectors(lay)+(det-1);
 959     Int_t lyr=(lay-1);
 960
 961
 962     for(i=0; i<nofClusters; i++) {
 963         AliITSRawClusterSDD *clusterI = (AliITSRawClusterSDD*)Cluster(i);
 964         if(!clusterI) Error("SDD: GetRecPoints","i clusterI ",i,clusterI);
 965         if(clusterI) idx=clusterI->PeakPos();
 966         if(idx>ndigits) Error("SDD: GetRecPoints","idx ndigits",idx,ndigits);
 967         // try peak neighbours - to be done
 968         if(idx&&idx<= ndigits) dig =(AliITSdigitSDD*)GetDigit(idx);
 969         if(!dig) {
 970             // try cog
 971             Float_t xMicrons=clusterI->X()*kcmToMicrons;
 972             Float_t zMicrons=clusterI->Z()*kcmToMicrons;
 973             Float_t zAnode=zMicrons/GetSeg()->Dpz(0)+nAnodes/2;
 974             Float_t driftSpeed=cal->GetDriftSpeedAtAnode(zAnode);
 975             Float_t driftPath=GetSeg()->Dx()-TMath::Abs(xMicrons);
 976             ix=1+(Int_t)(driftPath/driftSpeed/GetSeg()->Dpx(0));
 977             iz=1+(Int_t)zAnode;
 978             if(xMicrons>0) iz+=nAnodes;
 979             dig = (AliITSdigitSDD*)Map()->GetHit(iz-1,ix-1);
 980             // if null try neighbours
 981             if (!dig) dig = (AliITSdigitSDD*)Map()->GetHit(iz-1,ix);
 982             if (!dig) dig = (AliITSdigitSDD*)Map()->GetHit(iz-1,ix+1);
 983             if (!dig) printf("SDD: cannot assign the track number!\n");
 984         } //  end if !dig
 985
 986         Int_t lab[4] = {-3141593,-3141593,-3141593,ind};
 987         if (dig) {
 988           lab[0] = dig->GetTrack(0);
 989           lab[1] = dig->GetTrack(1);
 990           lab[2] = dig->GetTrack(2);
 991         }
 992         Float_t hit[5] = {clusterI->X(),clusterI->Z(),kRMSx*kRMSx,kRMSz*kRMSz,clusterI->Q()};
 993         Int_t info[3] = {0,0,lyr};
 994
 995         AliITSRecPoint rnew(lab,hit,info,kTRUE);
 996         rnew.SetdEdX(kconvGeV*clusterI->Q());
 997
 998         fDetTypeRec->AddRecPoint(rnew);
 999     } // I clusters
1000 //    Map()->ClearMap();
1001 }
1002 //______________________________________________________________________
1003 void AliITSClusterFinderSDD::FindRawClusters(Int_t mod){
1004     // find raw clusters
1005
1006     SetModule(mod);
1007     SetCutAmplitude(mod);
1008     AliITSCalibrationSDD* cal = (AliITSCalibrationSDD*)GetResp(mod);
1009     Int_t nanodes=GetSeg()->Npz();
1010     Int_t noise=0;
1011     for(Int_t i=0;i<nanodes;i++){
1012       noise+=(Int_t)cal->GetNoiseAfterElectronics(i);
1013     }
1014     SetMinPeak((noise/nanodes)*5);
1015     Find1DClustersE();
1016     GroupClusters();
1017     SelectClusters();
1018     ResolveClusters();
1019     GetRecPoints(cal);
1020 }
1021 //_______________________________________________________________________
1022 void AliITSClusterFinderSDD::PrintStatus() const{
1023     // Print SDD cluster finder Parameters
1024
1025     cout << "**************************************************" << endl;
1026     cout << " Silicon Drift Detector Cluster Finder Parameters " << endl;
1027     cout << "**************************************************" << endl;
1028     cout << "Number of Clusters: " << fNclusters << endl;
1029     cout << "Anode Tolerance: " << fDAnode << endl;
1030     cout << "Time  Tolerance: " << fDTime << endl;
1031     cout << "Time  correction (electronics): " << fTimeCorr << endl;
1032     cout << "Cut Amplitude (threshold): " << fCutAmplitude[0] << endl;
1033     cout << "Minimum Amplitude: " << fMinPeak << endl;
1034     cout << "Minimum Charge: " << fMinCharge << endl;
1035     cout << "Minimum number of cells/clusters: " << fMinNCells << endl;
1036     cout << "Maximum number of cells/clusters: " << fMaxNCells << endl;
1037     cout << "**************************************************" << endl;
1038 }
1039
1040