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     Double_t anodePitch   = GetSeg()->Dpz(dummy);
 112     AliITSCalibrationSDD* cal = (AliITSCalibrationSDD*)GetResp(fModule);
 113     AliITSresponseSDD* res  = (AliITSresponseSDD*)((AliITSCalibrationSDD*)GetResp(fModule))->GetResponse();
 114     const char *option=res->ZeroSuppOption();
 115
 116     // map the signal
 117     Map()->ClearMap();
 118     Map()->SetThresholdArr(fCutAmplitude);
 119     Map()->FillMap2();
 120
 121     Int_t nofFoundClusters = 0;
 122     Int_t i;
 123     Double_t **dfadc = new Double_t*[fNofAnodes];
 124     for(i=0;i<fNofAnodes;i++) dfadc[i] = new Double_t[fMaxNofSamples];
 125     Double_t fadc  = 0.;
 126     Double_t fadc1 = 0.;
 127     Double_t fadc2 = 0.;
 128     Int_t j,k,idx,l,m;
 129     for(j=0;j<2;j++) {
 130         for(k=0;k<fNofAnodes;k++) {
 131             idx = j*fNofAnodes+k;
 132             // signal (fadc) & derivative (dfadc)
 133             dfadc[k][255]=0.;
 134             for(l=0; l<fMaxNofSamples; l++) {
 135                 fadc2=(Double_t)Map()->GetSignal(idx,l);
 136                 if(l>0) fadc1=(Double_t)Map()->GetSignal(idx,l-1);
 137                 if(l>0) dfadc[k][l-1] = fadc2-fadc1;
 138             } // samples
 139         } // anodes
 140
 141         for(k=0;k<fNofAnodes;k++) {
 142             AliDebug(5,Form("Anode: %d, Wing: %d",k+1,j+1));
 143             idx = j*fNofAnodes+k;
 144             Int_t imax  = 0;
 145             Int_t imaxd = 0;
 146             Int_t it    = 0;
 147             while(it <= fMaxNofSamples-3) {
 148                 imax  = it;
 149                 imaxd = it;
 150                 // maximum of signal
 151                 Double_t fadcmax  = 0.;
 152                 Double_t dfadcmax = 0.;
 153                 Int_t lthrmina   = 1;
 154                 Int_t lthrmint   = 3;
 155                 Int_t lthra      = 1;
 156                 Int_t lthrt      = 0;
 157                 for(m=0;m<20;m++) {
 158                     Int_t id = it+m;
 159                     if(id>=fMaxNofSamples) break;
 160                     fadc=(float)Map()->GetSignal(idx,id);
 161                     if(fadc > fadcmax) { fadcmax = fadc; imax = id;}
 162                     if(fadc > (float)fCutAmplitude[idx])lthrt++;
 163                     if(dfadc[k][id] > dfadcmax) {
 164                         dfadcmax = dfadc[k][id];
 165                         imaxd    = id;
 166                     } // end if
 167                 } // end for m
 168                 it = imaxd;
 169                 if(Map()->TestHit(idx,imax) == kEmpty) {it++; continue;}
 170                 // cluster charge
 171                 Int_t tstart = it-2;
 172                 if(tstart < 0) tstart = 0;
 173                 Bool_t ilcl = 0;
 174                 if(lthrt >= lthrmint && lthra >= lthrmina) ilcl = 1;
 175                 if(ilcl) {
 176                     nofFoundClusters++;
 177                     Int_t tstop      = tstart;
 178                     Double_t dfadcmin = 10000.;
 179                     Int_t ij;
 180                     for(ij=0; ij<20; ij++) {
 181                         if(tstart+ij > 255) { tstop = 255; break; }
 182                         fadc=(float)Map()->GetSignal(idx,tstart+ij);
 183                         if((dfadc[k][tstart+ij] < dfadcmin) &&
 184                            (fadc > fCutAmplitude[idx])) {
 185                             tstop = tstart+ij+5;
 186                             if(tstop > 255) tstop = 255;
 187                             dfadcmin = dfadc[k][it+ij];
 188                         } // end if
 189                     } // end for ij
 190
 191                     Double_t clusterCharge = 0.;
 192                     Double_t clusterAnode  = k+0.5;
 193                     Double_t clusterTime   = 0.;
 194                     Int_t   clusterMult   = 0;
 195                     Double_t clusterPeakAmplitude = 0.;
 196                     Int_t its,peakpos     = -1;
 197
 198                     for(its=tstart; its<=tstop; its++) {
 199                         fadc=(float)Map()->GetSignal(idx,its);
 200                         if(!((strstr(option,"1D")) || (strstr(option,"2D")))){
 201                           Double_t baseline=GetResp(fModule)->GetBaseline(idx);
 202                           if(fadc>baseline) fadc -= baseline;
 203                           else fadc = 0.;
 204                         }
 205                         clusterCharge += fadc;
 206                         // as a matter of fact we should take the peak
 207                         // pos before FFT
 208                         // to get the list of tracks !!!
 209                         if(fadc > clusterPeakAmplitude) {
 210                             clusterPeakAmplitude = fadc;
 211                             //peakpos=Map()->GetHitIndex(idx,its);
 212                             Int_t shift = (int)(fTimeCorr/fTimeStep);
 213                             if(its>shift && its<(fMaxNofSamples-shift))
 214                                 peakpos  = Map()->GetHitIndex(idx,its+shift);
 215                             else peakpos = Map()->GetHitIndex(idx,its);
 216                             if(peakpos<0) peakpos =Map()->GetHitIndex(idx,its);
 217                         } // end if
 218                         clusterTime += fadc*its;
 219                         if(fadc > 0) clusterMult++;
 220                         if(its == tstop) {
 221                             clusterTime /= (clusterCharge/fTimeStep);   // ns
 222                             if(clusterTime>fTimeCorr) clusterTime -=fTimeCorr;
 223                             //ns
 224                         } // end if
 225                     } // end for its
 226
 227                     Double_t clusteranodePath = (clusterAnode - fNofAnodes/2)*
 228                                                  anodePitch;
 229                     Double_t clusterDriftPath = (Double_t)cal->GetDriftPath(clusterTime,clusteranodePath);
 230                     clusterDriftPath = fSddLength-clusterDriftPath;
 231                     if(clusterCharge <= 0.) break;
 232                     AliITSRawClusterSDD clust(j+1,//i
 233                                               clusterAnode,clusterTime,//ff
 234                                               clusterCharge, //f
 235                                               clusterPeakAmplitude, //f
 236                                               peakpos, //i
 237                                               0.,0.,clusterDriftPath,//fff
 238                                               clusteranodePath, //f
 239                                               clusterMult, //i
 240                                               0,0,0,0,0,0,0);//7*i
 241                     fDetTypeRec->AddCluster(1,&clust);
 242                     it = tstop;
 243                 } // ilcl
 244                 it++;
 245             } // while (samples)
 246         } // anodes
 247     } // detectors (2)
 248
 249     for(i=0;i<fNofAnodes;i++) delete[] dfadc[i];
 250     delete [] dfadc;
 251
 252     return;
 253 }
 254 //______________________________________________________________________
 255 void AliITSClusterFinderSDD::Find1DClustersE(){
 256     // find 1D clusters
 257     // retrieve the parameters
 258     Int_t fNofMaps = GetSeg()->Npz();
 259     Int_t fMaxNofSamples = GetSeg()->Npx();
 260     Int_t fNofAnodes = fNofMaps/2;
 261     Int_t dummy=0;
 262     Double_t fTimeStep = GetSeg()->Dpx( dummy );
 263     Double_t fSddLength = GetSeg()->Dx();
 264     Double_t anodePitch = GetSeg()->Dpz( dummy );
 265     AliITSCalibrationSDD* cal = (AliITSCalibrationSDD*)GetResp(fModule);
 266     Map()->ClearMap();
 267     Map()->SetThresholdArr( fCutAmplitude );
 268     Map()->FillMap2();
 269
 270     AliITSresponseSDD* res  = (AliITSresponseSDD*)cal->GetResponse();
 271     const char *option=res->ZeroSuppOption();
 272
 273     Int_t nClu = 0;
 274     //        cout << "Search  cluster... "<< endl;
 275     for( Int_t j=0; j<2; j++ ){
 276         for( Int_t k=0; k<fNofAnodes; k++ ){
 277             Int_t idx = j*fNofAnodes+k;
 278             Bool_t on = kFALSE;
 279             Int_t start = 0;
 280             Int_t nTsteps = 0;
 281             Double_t fmax = 0.;
 282             Int_t lmax = 0;
 283             Double_t charge = 0.;
 284             Double_t time = 0.;
 285             Double_t anode = k+0.5;
 286             Int_t peakpos = -1;
 287             for( Int_t l=0; l<fMaxNofSamples; l++ ){
 288                 Double_t fadc = (Double_t)Map()->GetSignal( idx, l );
 289                 if( fadc > 0.0 ){
 290                     if( on == kFALSE && l<fMaxNofSamples-4){
 291                         // star RawCluster (reset var.)
 292                         Double_t fadc1 = (Double_t)Map()->GetSignal( idx, l+1 );
 293                         if( fadc1 < fadc ) continue;
 294                         start = l;
 295                         fmax = 0.;
 296                         lmax = 0;
 297                         time = 0.;
 298                         charge = 0.;
 299                         on = kTRUE;
 300                         nTsteps = 0;
 301                     } // end if on...
 302                     nTsteps++ ;
 303                     if(!((strstr(option,"1D")) || (strstr(option,"2D")))){
 304                       Double_t baseline=GetResp(fModule)->GetBaseline(idx);
 305                       if( fadc > baseline ) fadc -= baseline;
 306                       else fadc=0.;
 307                     }
 308                     charge += fadc;
 309                     time += fadc*l;
 310                     if( fadc > fmax ){
 311                         fmax = fadc;
 312                         lmax = l;
 313                         Int_t shift = (Int_t)(fTimeCorr/fTimeStep + 0.5);
 314                         if( l > shift && l < (fMaxNofSamples-shift) )
 315                             peakpos = Map()->GetHitIndex( idx, l+shift );
 316                         else
 317                             peakpos = Map()->GetHitIndex( idx, l );
 318                         if( peakpos < 0) peakpos = Map()->GetHitIndex(idx,l);
 319                     } // end if fadc
 320                 }else{ // end fadc>0
 321                     if( on == kTRUE ){
 322                         if( nTsteps > 2 ){
 323                             //  min # of timesteps for a RawCluster
 324                             // Found a RawCluster...
 325                             Int_t stop = l-1;
 326                             time /= (charge/fTimeStep);   // ns
 327                                 // time = lmax*fTimeStep;   // ns
 328                             if( time > fTimeCorr ) time -= fTimeCorr;   // ns
 329                             Double_t anodePath =(anode-fNofAnodes/2)*anodePitch;
 330
 331                             Double_t driftPath = (Double_t)cal->GetDriftPath(time,anode);
 332                             driftPath = fSddLength-driftPath;
 333                             AliITSRawClusterSDD clust(j+1,anode,time,charge,
 334                                                       fmax, peakpos,0.,0.,
 335                                                       driftPath,anodePath,
 336                                                       nTsteps,start,stop,
 337                                                       start, stop, 1, k, k );
 338                             fDetTypeRec->AddCluster( 1, &clust );
 339                             if(AliDebugLevel()>=5) clust.PrintInfo();
 340                             nClu++;
 341                         } // end if nTsteps
 342                         on = kFALSE;
 343                     } // end if on==kTRUE
 344                 } // end if fadc>0
 345             } // samples
 346         } // anodes
 347     } // wings
 348     AliDebug(3,Form("# Rawclusters %d",nClu));
 349     return;
 350 }
 351 //_______________________________________________________________________
 352 Int_t AliITSClusterFinderSDD::SearchPeak(Double_t *spect,Int_t xdim,Int_t zdim,
 353                                          Int_t *peakX, Int_t *peakZ,
 354                                          Double_t *peakAmp, Double_t minpeak ){
 355     // search peaks on a 2D cluster
 356     Int_t npeak = 0;    // # peaks
 357     Int_t i,j;
 358     // search peaks
 359     for( Int_t z=1; z<zdim-1; z++ ){
 360         for( Int_t x=1; x<xdim-2; x++ ){
 361             Double_t sxz = spect[x*zdim+z];
 362             Double_t sxz1 = spect[(x+1)*zdim+z];
 363             Double_t sxz2 = spect[(x-1)*zdim+z];
 364             // search a local max. in s[x,z]
 365             if( sxz < minpeak || sxz1 <= 0 || sxz2 <= 0 ) continue;
 366             if( sxz >= spect[(x+1)*zdim+z  ] && sxz >= spect[(x-1)*zdim+z  ] &&
 367                 sxz >= spect[x*zdim    +z+1] && sxz >= spect[x*zdim    +z-1] &&
 368                 sxz >= spect[(x+1)*zdim+z+1] && sxz >= spect[(x+1)*zdim+z-1] &&
 369                 sxz >= spect[(x-1)*zdim+z+1] && sxz >= spect[(x-1)*zdim+z-1] ){
 370                 // peak found
 371                 peakX[npeak] = x;
 372                 peakZ[npeak] = z;
 373                 peakAmp[npeak] = sxz;
 374                 npeak++;
 375             } // end if ....
 376         } // end for x
 377     } // end for z
 378     // search groups of peaks with same amplitude.
 379     Int_t *flag = new Int_t[npeak];
 380     for( i=0; i<npeak; i++ ) flag[i] = 0;
 381     for( i=0; i<npeak; i++ ){
 382         for( j=0; j<npeak; j++ ){
 383             if( i==j) continue;
 384             if( flag[j] > 0 ) continue;
 385             if( peakAmp[i] == peakAmp[j] &&
 386                 TMath::Abs(peakX[i]-peakX[j])<=1 &&
 387                 TMath::Abs(peakZ[i]-peakZ[j])<=1 ){
 388                 if( flag[i] == 0) flag[i] = i+1;
 389                 flag[j] = flag[i];
 390             } // end if ...
 391         } // end for j
 392     } // end for i
 393     // make average of peak groups
 394     for( i=0; i<npeak; i++ ){
 395         Int_t nFlag = 1;
 396         if( flag[i] <= 0 ) continue;
 397         for( j=0; j<npeak; j++ ){
 398             if( i==j ) continue;
 399             if( flag[j] != flag[i] ) continue;
 400             peakX[i] += peakX[j];
 401             peakZ[i] += peakZ[j];
 402             nFlag++;
 403             npeak--;
 404             for( Int_t k=j; k<npeak; k++ ){
 405                 peakX[k] = peakX[k+1];
 406                 peakZ[k] = peakZ[k+1];
 407                 peakAmp[k] = peakAmp[k+1];
 408                 flag[k] = flag[k+1];
 409             } // end for k
 410             j--;
 411         } // end for j
 412         if( nFlag > 1 ){
 413             peakX[i] /= nFlag;
 414             peakZ[i] /= nFlag;
 415         } // end fi nFlag
 416     } // end for i
 417     delete [] flag;
 418     return( npeak );
 419 }
 420 //______________________________________________________________________
 421 void AliITSClusterFinderSDD::PeakFunc( Int_t xdim, Int_t zdim, Double_t *par,
 422                                        Double_t *spe, Double_t *integral){
 423     // function used to fit the clusters
 424     // par -> parameters..
 425     // par[0]  number of peaks.
 426     // for each peak i=1, ..., par[0]
 427     //                 par[i] = Ampl.
 428     //                 par[i+1] = xpos
 429     //                 par[i+2] = zpos
 430     //                 par[i+3] = tau
 431     //                 par[i+4] = sigma.
 432     Int_t electronics = GetResp(fModule)->GetElectronics(); // 1 = PASCAL, 2 = OLA
 433     const Int_t knParam = 5;
 434     Int_t npeak = (Int_t)par[0];
 435
 436     memset( spe, 0, sizeof( Double_t )*zdim*xdim );
 437
 438     Int_t k = 1;
 439     for( Int_t i=0; i<npeak; i++ ){
 440         if( integral != 0 ) integral[i] = 0.;
 441         Double_t sigmaA2 = par[k+4]*par[k+4]*2.;
 442         Double_t t2 = par[k+3];   // PASCAL
 443         if( electronics == 2 ) { t2 *= t2; t2 *= 2; } // OLA
 444         for( Int_t z=0; z<zdim; z++ ){
 445             for( Int_t x=0; x<xdim; x++ ){
 446                 Double_t z2 = (z-par[k+2])*(z-par[k+2])/sigmaA2;
 447                 Double_t x2 = 0.;
 448                 Double_t signal = 0.;
 449                 if( electronics == 1 ){ // PASCAL
 450                     x2 = (x-par[k+1]+t2)/t2;
 451                     signal = (x2>0.) ? par[k]*x2*exp(-x2+1.-z2) :0.0; // RCCR2
 452                 //  signal =(x2>0.) ? par[k]*x2*x2*exp(-2*x2+2.-z2 ):0.0;//RCCR
 453                 }else if( electronics == 2 ) { // OLA
 454                     x2 = (x-par[k+1])*(x-par[k+1])/t2;
 455                     signal = par[k]  * exp( -x2 - z2 );
 456                 } else {
 457                     Warning("PeakFunc","Wrong SDD Electronics = %d",
 458                             electronics);
 459                     // exit( 1 );
 460                 } // end if electronicx
 461                 spe[x*zdim+z] += signal;
 462                 if( integral != 0 ) integral[i] += signal;
 463             } // end for x
 464         } // end for z
 465         k += knParam;
 466     } // end for i
 467     return;
 468 }
 469 //__________________________________________________________________________
 470 Double_t AliITSClusterFinderSDD::ChiSqr( Int_t xdim, Int_t zdim, Double_t *spe,
 471                                         Double_t *speFit ) const{
 472     // EVALUATES UNNORMALIZED CHI-SQUARED
 473     Double_t chi2 = 0.;
 474     for( Int_t z=0; z<zdim; z++ ){
 475         for( Int_t x=1; x<xdim-1; x++ ){
 476             Int_t index = x*zdim+z;
 477             Double_t tmp = spe[index] - speFit[index];
 478             chi2 += tmp*tmp;
 479         } // end for x
 480     } // end for z
 481     return( chi2 );
 482 }
 483 //_______________________________________________________________________
 484 void AliITSClusterFinderSDD::Minim( Int_t xdim, Int_t zdim, Double_t *param,
 485                                     Double_t *prm0,Double_t *steprm,
 486                                     Double_t *chisqr,Double_t *spe,
 487                                     Double_t *speFit ){
 488     //
 489     Int_t   k, nnn, mmm, i;
 490     Double_t p1, delta, d1, chisq1, p2, chisq2, t, p3, chisq3, a, b, p0, chisqt;
 491     const Int_t knParam = 5;
 492     Int_t npeak = (Int_t)param[0];
 493     for( k=1; k<(npeak*knParam+1); k++ ) prm0[k] = param[k];
 494     for( k=1; k<(npeak*knParam+1); k++ ){
 495         p1 = param[k];
 496         delta = steprm[k];
 497         d1 = delta;
 498         // ENSURE THAT STEP SIZE IS SENSIBLY LARGER THAN MACHINE ROUND OFF
 499         if( TMath::Abs( p1 ) > 1.0E-6 )
 500             if ( TMath::Abs( delta/p1 ) < 1.0E-4 ) delta = p1/1000;
 501             else  delta = (Double_t)1.0E-4;
 502         //  EVALUATE CHI-SQUARED AT FIRST TWO SEARCH POINTS
 503         PeakFunc( xdim, zdim, param, speFit );
 504         chisq1 = ChiSqr( xdim, zdim, spe, speFit );
 505         p2 = p1+delta;
 506         param[k] = p2;
 507         PeakFunc( xdim, zdim, param, speFit );
 508         chisq2 = ChiSqr( xdim, zdim, spe, speFit );
 509         if( chisq1 < chisq2 ){
 510             // REVERSE DIRECTION OF SEARCH IF CHI-SQUARED IS INCREASING
 511             delta = -delta;
 512             t = p1;
 513             p1 = p2;
 514             p2 = t;
 515             t = chisq1;
 516             chisq1 = chisq2;
 517             chisq2 = t;
 518         } // end if
 519         i = 1; nnn = 0;
 520         do {   // INCREMENT param(K) UNTIL CHI-SQUARED STARTS TO INCREASE
 521             nnn++;
 522             p3 = p2 + delta;
 523             mmm = nnn - (nnn/5)*5;  // multiplo de 5
 524             if( mmm == 0 ){
 525                 d1 = delta;
 526                 // INCREASE STEP SIZE IF STEPPING TOWARDS MINIMUM IS TOO SLOW
 527                 delta *= 5;
 528             } // end if
 529             param[k] = p3;
 530             // Constrain paramiters
 531             Int_t kpos = (k-1) % knParam;
 532             switch( kpos ){
 533             case 0 :
 534                 if( param[k] <= 20 ) param[k] = fMinPeak;
 535                 break;
 536             case 1 :
 537                 if( TMath::Abs( param[k] - prm0[k] ) > 1.5 ) param[k] = prm0[k];
 538                 break;
 539             case 2 :
 540                 if( TMath::Abs( param[k] - prm0[k] ) > 1. ) param[k] = prm0[k];
 541                 break;
 542             case 3 :
 543                 if( param[k] < .5 ) param[k] = .5;
 544                 break;
 545             case 4 :
 546                 if( param[k] < .288 ) param[k] = .288;// 1/sqrt(12) = 0.288
 547                 if( param[k] > zdim*.5 ) param[k] = zdim*.5;
 548                 break;
 549             }; // end switch
 550             PeakFunc( xdim, zdim, param, speFit );
 551             chisq3 = ChiSqr( xdim, zdim, spe, speFit );
 552             if( chisq3 < chisq2 && nnn < 50 ){
 553                 p1 = p2;
 554                 p2 = p3;
 555                 chisq1 = chisq2;
 556                 chisq2 = chisq3;
 557             }else i=0;
 558         } while( i );
 559         // FIND MINIMUM OF PARABOLA DEFINED BY LAST THREE POINTS
 560         a = chisq1*(p2-p3)+chisq2*(p3-p1)+chisq3*(p1-p2);
 561         b = chisq1*(p2*p2-p3*p3)+chisq2*(p3*p3-p1*p1)+chisq3*(p1*p1-p2*p2);
 562         if( a!=0 ) p0 = (Double_t)(0.5*b/a);
 563         else p0 = 10000;
 564         //--IN CASE OF NEARLY EQUAL CHI-SQUARED AND TOO SMALL STEP SIZE PREVENT
 565         //   ERRONEOUS EVALUATION OF PARABOLA MINIMUM
 566         //---NEXT TWO LINES CAN BE OMITTED FOR HIGHER PRECISION MACHINES
 567         //dp = (Double_t) max (TMath::Abs(p3-p2), TMath::Abs(p2-p1));
 568         //if( TMath::Abs( p2-p0 ) > dp ) p0 = p2;
 569         param[k] = p0;
 570         // Constrain paramiters
 571         Int_t kpos = (k-1) % knParam;
 572         switch( kpos ){
 573         case 0 :
 574             if( param[k] <= 20 ) param[k] = fMinPeak;
 575             break;
 576         case 1 :
 577             if( TMath::Abs( param[k] - prm0[k] ) > 1.5 ) param[k] = prm0[k];
 578             break;
 579         case 2 :
 580             if( TMath::Abs( param[k] - prm0[k] ) > 1. ) param[k] = prm0[k];
 581             break;
 582         case 3 :
 583             if( param[k] < .5 ) param[k] = .5;
 584             break;
 585         case 4 :
 586             if( param[k] < .288 ) param[k] = .288;  // 1/sqrt(12) = 0.288
 587             if( param[k] > zdim*.5 ) param[k] = zdim*.5;
 588             break;
 589         }; // end switch
 590         PeakFunc( xdim, zdim, param, speFit );
 591         chisqt = ChiSqr( xdim, zdim, spe, speFit );
 592         // DO NOT ALLOW ERRONEOUS INTERPOLATION
 593         if( chisqt <= *chisqr ) *chisqr = chisqt;
 594         else param[k] = prm0[k];
 595         // OPTIMIZE SEARCH STEP FOR EVENTUAL NEXT CALL OF MINIM
 596         steprm[k] = (param[k]-prm0[k])/5;
 597         if( steprm[k] >= d1 ) steprm[k] = d1/5;
 598     } // end for k
 599     // EVALUATE FIT AND CHI-SQUARED FOR OPTIMIZED PARAMETERS
 600     PeakFunc( xdim, zdim, param, speFit );
 601     *chisqr = ChiSqr( xdim, zdim, spe, speFit );
 602     return;
 603 }
 604 //_________________________________________________________________________
 605 Int_t AliITSClusterFinderSDD::NoLinearFit( Int_t xdim, Int_t zdim,
 606                                            Double_t *param, Double_t *spe,
 607                                            Int_t *niter, Double_t *chir ){
 608     // fit method from Comput. Phys. Commun 46(1987) 149
 609     const Double_t kchilmt = 0.01;  //        relative accuracy
 610     const Int_t   knel = 3;        //        for parabolic minimization
 611     const Int_t   knstop = 50;     //        Max. iteration number
 612     const Int_t   knParam = 5;
 613     Int_t npeak = (Int_t)param[0];
 614     // RETURN IF NUMBER OF DEGREES OF FREEDOM IS NOT POSITIVE
 615     if( (xdim*zdim - npeak*knParam) <= 0 ) return( -1 );
 616     Double_t degFree = (xdim*zdim - npeak*knParam)-1;
 617     Int_t   n, k, iterNum = 0;
 618     Double_t *prm0 = new Double_t[npeak*knParam+1];
 619     Double_t *step = new Double_t[npeak*knParam+1];
 620     Double_t *schi = new Double_t[npeak*knParam+1];
 621     Double_t *sprm[3];
 622     sprm[0] = new Double_t[npeak*knParam+1];
 623     sprm[1] = new Double_t[npeak*knParam+1];
 624     sprm[2] = new Double_t[npeak*knParam+1];
 625     Double_t  chi0, chi1, reldif, a, b, prmin, dp;
 626     Double_t *speFit = new Double_t[ xdim*zdim ];
 627     PeakFunc( xdim, zdim, param, speFit );
 628     chi0 = ChiSqr( xdim, zdim, spe, speFit );
 629     chi1 = chi0;
 630     for( k=1; k<(npeak*knParam+1); k++) prm0[k] = param[k];
 631         for( k=1 ; k<(npeak*knParam+1); k+=knParam ){
 632             step[k] = param[k] / 20.0 ;
 633             step[k+1] = param[k+1] / 50.0;
 634             step[k+2] = param[k+2] / 50.0;
 635             step[k+3] = param[k+3] / 20.0;
 636             step[k+4] = param[k+4] / 20.0;
 637         } // end for k
 638     Int_t out = 0;
 639     do{
 640         iterNum++;
 641             chi0 = chi1;
 642             Minim( xdim, zdim, param, prm0, step, &chi1, spe, speFit );
 643             reldif = ( chi1 > 0 ) ? ((Double_t) TMath::Abs( chi1-chi0)/chi1 ) : 0;
 644         // EXIT conditions
 645         if( reldif < (float) kchilmt ){
 646             *chir  = (chi1>0) ? (float) TMath::Sqrt (chi1/degFree) :0;
 647             *niter = iterNum;
 648             out = 0;
 649             break;
 650         } // end if
 651         if( (reldif < (float)(5*kchilmt)) && (iterNum > knstop) ){
 652             *chir = (chi1>0) ?(float) TMath::Sqrt (chi1/degFree):0;
 653             *niter = iterNum;
 654             out = 0;
 655             break;
 656         } // end if
 657         if( iterNum > 5*knstop ){
 658             *chir  = (chi1>0) ?(float) TMath::Sqrt (chi1/degFree):0;
 659             *niter = iterNum;
 660             out = 1;
 661             break;
 662         } // end if
 663         if( iterNum <= knel ) continue;
 664         n = iterNum - (iterNum/knel)*knel; // EXTRAPOLATION LIMIT COUNTER N
 665         if( n > 3 || n == 0 ) continue;
 666         schi[n-1] = chi1;
 667         for( k=1; k<(npeak*knParam+1); k++ ) sprm[n-1][k] = param[k];
 668         if( n != 3 ) continue;
 669         // -EVALUATE EXTRAPOLATED VALUE OF EACH PARAMETER BY FINDING MINIMUM OF
 670         //    PARABOLA DEFINED BY LAST THREE CALLS OF MINIM
 671         for( k=1; k<(npeak*knParam+1); k++ ){
 672             Double_t tmp0 = sprm[0][k];
 673             Double_t tmp1 = sprm[1][k];
 674             Double_t tmp2 = sprm[2][k];
 675             a  = schi[0]*(tmp1-tmp2) + schi[1]*(tmp2-tmp0);
 676             a += (schi[2]*(tmp0-tmp1));
 677             b  = schi[0]*(tmp1*tmp1-tmp2*tmp2);
 678             b += (schi[1]*(tmp2*tmp2-tmp0*tmp0)+(schi[2]*
 679                                              (tmp0*tmp0-tmp1*tmp1)));
 680             if ((double)a < 1.0E-6) prmin = 0;
 681             else prmin = (float) (0.5*b/a);
 682             dp = 5*(tmp2-tmp0);
 683             if( TMath::Abs(prmin-tmp2) > TMath::Abs(dp) ) prmin = tmp2+dp;
 684             param[k] = prmin;
 685             step[k]  = dp/10; // OPTIMIZE SEARCH STEP
 686         } // end for k
 687     } while( kTRUE );
 688     delete [] prm0;
 689     delete [] step;
 690     delete [] schi;
 691     delete [] sprm[0];
 692     delete [] sprm[1];
 693     delete [] sprm[2];
 694     delete [] speFit;
 695     return( out );
 696 }
 697
 698 //______________________________________________________________________
 699 void AliITSClusterFinderSDD::ResolveClusters(){
 700     // The function to resolve clusters if the clusters overlapping exists
 701     Int_t i;
 702     // get number of clusters for this module
 703     Int_t nofClusters = NClusters();
 704     nofClusters -= fNclusters;
 705     Int_t fNofMaps = GetSeg()->Npz();
 706     Int_t fNofAnodes = fNofMaps/2;
 707     //Int_t fMaxNofSamples = GetSeg()->Npx();
 708     Int_t dummy=0;
 709     Double_t fTimeStep = GetSeg()->Dpx( dummy );
 710     Double_t fSddLength = GetSeg()->Dx();
 711     Double_t anodePitch = GetSeg()->Dpz( dummy );
 712     Int_t electronics =GetResp(fModule)->GetElectronics(); // 1 = PASCAL, 2 = OLA
 713     AliITSCalibrationSDD* cal = (AliITSCalibrationSDD*)GetResp(fModule);
 714     AliITSresponseSDD* res  = (AliITSresponseSDD*)cal->GetResponse();
 715     const char *option=res->ZeroSuppOption();
 716
 717
 718     for( Int_t j=0; j<nofClusters; j++ ){
 719         // get cluster information
 720         AliITSRawClusterSDD *clusterJ=(AliITSRawClusterSDD*) Cluster(j);
 721         Int_t astart = clusterJ->Astart();
 722         Int_t astop = clusterJ->Astop();
 723         Int_t tstart = clusterJ->Tstartf();
 724         Int_t tstop = clusterJ->Tstopf();
 725         Int_t wing = (Int_t)clusterJ->W();
 726         if( wing == 2 ){
 727             astart += fNofAnodes;
 728             astop  += fNofAnodes;
 729         } // end if
 730         Int_t xdim = tstop-tstart+3;
 731         Int_t zdim = astop-astart+3;
 732         if( xdim > 50 || zdim > 30 ) {
 733             Warning("ResolveClusters","xdim: %d , zdim: %d ",xdim,zdim);
 734             continue;
 735         }
 736         Double_t *sp = new Double_t[ xdim*zdim+1 ];
 737         memset( sp, 0, sizeof(Double_t)*(xdim*zdim+1) );
 738
 739         // make a local map from cluster region
 740         for( Int_t ianode=astart; ianode<=astop; ianode++ ){
 741             for( Int_t itime=tstart; itime<=tstop; itime++ ){
 742                 Double_t fadc = Map()->GetSignal( ianode, itime );
 743                 if(!((strstr(option,"1D")) || (strstr(option,"2D")))){
 744                   Double_t baseline=GetResp(fModule)->GetBaseline(ianode);
 745                   if( fadc > baseline ) fadc -= (Double_t)baseline;
 746                   else fadc = 0.;
 747                 }
 748                 Int_t index = (itime-tstart+1)*zdim+(ianode-astart+1);
 749                 sp[index] = fadc;
 750             } // time loop
 751         } // anode loop
 752
 753         // search peaks on cluster
 754         const Int_t kNp = 150;
 755         Int_t peakX1[kNp];
 756         Int_t peakZ1[kNp];
 757         Double_t peakAmp1[kNp];
 758         Int_t npeak = SearchPeak(sp,xdim,zdim,peakX1,peakZ1,peakAmp1,fMinPeak);
 759
 760         // if multiple peaks, split cluster
 761         if( npeak >= 1 ){
 762             //        cout << "npeak " << npeak << endl;
 763             //        clusterJ->PrintInfo();
 764             Double_t *par = new Double_t[npeak*5+1];
 765             par[0] = (Double_t)npeak;
 766             // Initial parameters in cell dimentions
 767             Int_t k1 = 1;
 768             for( i=0; i<npeak; i++ ){
 769                 par[k1] = peakAmp1[i];
 770                 par[k1+1] = peakX1[i]; // local time pos. [timebin]
 771                 par[k1+2] = peakZ1[i]; // local anode pos. [anodepitch]
 772                 if( electronics == 1 ) par[k1+3] = 2.; // PASCAL
 773                 else if(electronics==2) par[k1+3] = 0.7;//tau [timebin] OLA
 774                 par[k1+4] = .4;    // sigma        [anodepich]
 775                 k1 += 5;
 776             } // end for i
 777             Int_t niter;
 778             Double_t chir;
 779             NoLinearFit( xdim, zdim, par, sp, &niter, &chir );
 780             Double_t peakX[kNp];
 781             Double_t peakZ[kNp];
 782             Double_t sigma[kNp];
 783             Double_t tau[kNp];
 784             Double_t peakAmp[kNp];
 785             Double_t integral[kNp];
 786             //get integrals => charge for each peak
 787             PeakFunc( xdim, zdim, par, sp, integral );
 788             k1 = 1;
 789             for( i=0; i<npeak; i++ ){
 790                 peakAmp[i] = par[k1];
 791                 peakX[i]   = par[k1+1];
 792                 peakZ[i]   = par[k1+2];
 793                 tau[i]     = par[k1+3];
 794                 sigma[i]   = par[k1+4];
 795                 k1+=5;
 796             } // end for i
 797             // calculate parameter for new clusters
 798             for( i=0; i<npeak; i++ ){
 799                 AliITSRawClusterSDD clusterI( *clusterJ );
 800
 801                 Int_t newAnode = peakZ1[i]-1 + astart;
 802
 803             //    Int_t newiTime = peakX1[i]-1 + tstart;
 804             //    Int_t shift = (Int_t)(fTimeCorr/fTimeStep + 0.5);
 805             //    if( newiTime > shift && newiTime < (fMaxNofSamples-shift) )
 806             //        shift = 0;
 807             //    Int_t peakpos = Map()->GetHitIndex(newAnode,newiTime+shift );
 808             //    clusterI.SetPeakPos( peakpos );
 809
 810                 clusterI.SetPeakAmpl( peakAmp1[i] );
 811                 Double_t newAnodef = peakZ[i] - 0.5 + astart;
 812                 Double_t newiTimef = peakX[i] - 1 + tstart;
 813                 if( wing == 2 ) newAnodef -= fNofAnodes;
 814                 Double_t anodePath = (newAnodef - fNofAnodes/2)*anodePitch;
 815                 newiTimef *= fTimeStep;
 816                 if( newiTimef > fTimeCorr ) newiTimef -= fTimeCorr;
 817                 if( electronics == 1 ){
 818                 //    newiTimef *= 0.999438;    // PASCAL
 819                 //    newiTimef += (6./fDriftSpeed - newiTimef/3000.);
 820                 }else if( electronics == 2 )
 821                     newiTimef *= 0.99714;    // OLA
 822
 823                 Int_t timeBin = (Int_t)(newiTimef/fTimeStep+0.5);
 824                 Int_t peakpos = Map()->GetHitIndex( newAnode, timeBin );
 825                 if( peakpos < 0 ) {
 826                     for( Int_t ii=0; ii<3; ii++ ) {
 827                         peakpos = Map()->GetHitIndex( newAnode, timeBin+ii );
 828                         if( peakpos > 0 ) break;
 829                         peakpos = Map()->GetHitIndex( newAnode, timeBin-ii );
 830                         if( peakpos > 0 ) break;
 831                     }
 832                 }
 833
 834                 if( peakpos < 0 ) {
 835                     //Warning("ResolveClusters",
 836                     //        "Digit not found for cluster");
 837                     //if(AliDebugLevel()>=3) clusterI.PrintInfo();
 838                    continue;
 839                 }
 840                 clusterI.SetPeakPos( peakpos );
 841                 Float_t dp = cal->GetDriftPath(newiTimef,newAnodef);
 842                 Double_t driftPath = fSddLength - (Double_t)dp;
 843                 Double_t sign = ( wing == 1 ) ? -1. : 1.;
 844                 Double_t xcoord = driftPath*sign * 0.0001;
 845                 Double_t zcoord = anodePath * 0.0001;
 846                 CorrectPosition(zcoord,xcoord);
 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 //_________________________________________________________________________
1041 void AliITSClusterFinderSDD::CorrectPosition(Double_t &z, Double_t&y){
1042   //correction of coordinates using the maps stored in the DB
1043
1044   AliITSCalibrationSDD* cal = (AliITSCalibrationSDD*)GetResp(fModule);
1045   static const Int_t nbint = cal->GetMapTimeNBin();
1046   static const Int_t nbina = cal->Chips()*cal->Channels();
1047   Float_t stepa = (GetSeg()->Dpz(0))/10000.; //anode pitch in cm
1048   Float_t stept = (GetSeg()->Dx()/cal->GetMapTimeNBin()/2.)/10.;
1049
1050   Int_t bint = TMath::Abs((Int_t)(y/stept));
1051   if(y>=0) bint+=(Int_t)(nbint/2.);
1052   if(bint>nbint) AliError("Wrong bin number!");
1053
1054   Int_t bina = TMath::Abs((Int_t)(z/stepa));
1055   if(z>=0) bina+=(Int_t)(nbina/2.);
1056   if(bina>nbina) AliError("Wrong bin number!");
1057
1058   Double_t devz = (Double_t)cal->GetMapACell(bina,bint)/10000.;
1059   Double_t devx = (Double_t)cal->GetMapTCell(bina,bint)/10000.;
1060   z+=devz;
1061   y+=devx;
1062
1063 }