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 "AliLog.h"
  34
  35 ClassImp(AliITSClusterFinderSDD)
  36
  37 //______________________________________________________________________
  38 AliITSClusterFinderSDD::AliITSClusterFinderSDD():
  39 AliITSClusterFinder(),
  40 fNclusters(0),
  41 fDAnode(0.0),
  42 fDTime(0.0),
  43 fTimeCorr(0.0),
  44 fCutAmplitude(0),
  45 fMinPeak(0),
  46 fMinCharge(0),
  47 fMinNCells(0),
  48 fMaxNCells(0){
  49     // default constructor
  50 }
  51 //______________________________________________________________________
  52 AliITSClusterFinderSDD::AliITSClusterFinderSDD(AliITSDetTypeRec* dettyp,
  53                                                TClonesArray *digits,
  54                                                TClonesArray *recp):
  55 AliITSClusterFinder(dettyp),
  56 fNclusters(0),
  57 fDAnode(0.0),
  58 fDTime(0.0),
  59 fTimeCorr(0.0),
  60 fCutAmplitude(0),
  61 fMinPeak(0),
  62 fMinCharge(0),
  63 fMinNCells(0),
  64 fMaxNCells(0){
  65     // standard constructor
  66
  67     SetDigits(digits);
  68     SetClusters(recp);
  69     SetCutAmplitude(fDetTypeRec->GetITSgeom()->GetStartSDD());
  70     SetDAnode();
  71     SetDTime();
  72     SetMinPeak((Int_t)((AliITSCalibrationSDD*)GetResp(fDetTypeRec->GetITSgeom()->GetStartSDD()))->GetNoiseAfterElectronics(0)*5);
  73     SetMinNCells();
  74     SetMaxNCells();
  75     SetTimeCorr();
  76     SetMinCharge();
  77     SetMap(new AliITSMapA1(GetSeg(),Digits(),fCutAmplitude));
  78 }
  79 //______________________________________________________________________
  80 void AliITSClusterFinderSDD::SetCutAmplitude(Int_t mod,Double_t nsigma){
  81     // set the signal threshold for cluster finder
  82     Double_t baseline,noiseAfterEl;
  83
  84     AliITSresponseSDD* res  = (AliITSresponseSDD*)((AliITSCalibrationSDD*)GetResp(mod))->GetResponse();
  85     const char *option=res->ZeroSuppOption();
  86     Int_t nanodes = GetResp(mod)->Wings()*GetResp(mod)->Channels()*GetResp(mod)->Chips();
  87     fCutAmplitude.Set(nanodes);
  88     for(Int_t ian=0;ian<nanodes;ian++){
  89       noiseAfterEl = ((AliITSCalibrationSDD*)GetResp(mod))->GetNoiseAfterElectronics(ian);
  90       if((strstr(option,"1D")) || (strstr(option,"2D"))){
  91         fCutAmplitude[ian] = (Int_t)(nsigma*noiseAfterEl);
  92       }
  93       else{
  94         baseline=GetResp(mod)->GetBaseline(ian);
  95         fCutAmplitude[ian] = (Int_t)((baseline + nsigma*noiseAfterEl));
  96       }
  97     }
  98 }
  99 //______________________________________________________________________
 100 void AliITSClusterFinderSDD::Find1DClusters(){
 101     // find 1D clusters
 102
 103     // retrieve the parameters
 104     Int_t fNofMaps       = GetSeg()->Npz();
 105     Int_t fMaxNofSamples = GetSeg()->Npx();
 106     Int_t fNofAnodes     = fNofMaps/2;
 107     Int_t dummy          = 0;
 108     Double_t fTimeStep    = GetSeg()->Dpx(dummy);
 109     Double_t fSddLength   = GetSeg()->Dx();
 110     Double_t anodePitch   = GetSeg()->Dpz(dummy);
 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
 226                     Double_t clusteranodePath = (clusterAnode - fNofAnodes/2)*
 227                                                  anodePitch;
 228                     Double_t clusterDriftPath = (Double_t)cal->GetDriftPath(clusterTime,clusteranodePath);
 229                     clusterDriftPath = fSddLength-clusterDriftPath;
 230                     if(clusterCharge <= 0.) break;
 231                     AliITSRawClusterSDD clust(j+1,//i
 232                                               clusterAnode,clusterTime,//ff
 233                                               clusterCharge, //f
 234                                               clusterPeakAmplitude, //f
 235                                               peakpos, //i
 236                                               0.,0.,clusterDriftPath,//fff
 237                                               clusteranodePath, //f
 238                                               clusterMult, //i
 239                                               0,0,0,0,0,0,0);//7*i
 240                     fDetTypeRec->AddCluster(1,&clust);
 241                     it = tstop;
 242                 } // ilcl
 243                 it++;
 244             } // while (samples)
 245         } // anodes
 246     } // detectors (2)
 247
 248     for(i=0;i<fNofAnodes;i++) delete[] dfadc[i];
 249     delete [] dfadc;
 250
 251     return;
 252 }
 253 //______________________________________________________________________
 254 void AliITSClusterFinderSDD::Find1DClustersE(){
 255     // find 1D clusters
 256     // retrieve the parameters
 257     Int_t fNofMaps = GetSeg()->Npz();
 258     Int_t fMaxNofSamples = GetSeg()->Npx();
 259     Int_t fNofAnodes = fNofMaps/2;
 260     Int_t dummy=0;
 261     Double_t fTimeStep = GetSeg()->Dpx( dummy );
 262     Double_t fSddLength = GetSeg()->Dx();
 263     Double_t anodePitch = GetSeg()->Dpz( dummy );
 264     AliITSCalibrationSDD* cal = (AliITSCalibrationSDD*)GetResp(fModule);
 265     Map()->ClearMap();
 266     Map()->SetThresholdArr( fCutAmplitude );
 267     Map()->FillMap2();
 268
 269     AliITSresponseSDD* res  = (AliITSresponseSDD*)cal->GetResponse();
 270     const char *option=res->ZeroSuppOption();
 271
 272     Int_t nClu = 0;
 273     //        cout << "Search  cluster... "<< endl;
 274     for( Int_t j=0; j<2; j++ ){
 275         for( Int_t k=0; k<fNofAnodes; k++ ){
 276             Int_t idx = j*fNofAnodes+k;
 277             Bool_t on = kFALSE;
 278             Int_t start = 0;
 279             Int_t nTsteps = 0;
 280             Double_t fmax = 0.;
 281             Int_t lmax = 0;
 282             Double_t charge = 0.;
 283             Double_t time = 0.;
 284             Double_t anode = k+0.5;
 285             Int_t peakpos = -1;
 286             for( Int_t l=0; l<fMaxNofSamples; l++ ){
 287                 Double_t fadc = (Double_t)Map()->GetSignal( idx, l );
 288                 if( fadc > 0.0 ){
 289                     if( on == kFALSE && l<fMaxNofSamples-4){
 290                         // star RawCluster (reset var.)
 291                         Double_t fadc1 = (Double_t)Map()->GetSignal( idx, l+1 );
 292                         if( fadc1 < fadc ) continue;
 293                         start = l;
 294                         fmax = 0.;
 295                         lmax = 0;
 296                         time = 0.;
 297                         charge = 0.;
 298                         on = kTRUE;
 299                         nTsteps = 0;
 300                     } // end if on...
 301                     nTsteps++ ;
 302                     if(!((strstr(option,"1D")) || (strstr(option,"2D")))){
 303                       Double_t baseline=GetResp(fModule)->GetBaseline(idx);
 304                       if( fadc > baseline ) fadc -= baseline;
 305                       else fadc=0.;
 306                     }
 307                     charge += fadc;
 308                     time += fadc*l;
 309                     if( fadc > fmax ){
 310                         fmax = fadc;
 311                         lmax = l;
 312                         Int_t shift = (Int_t)(fTimeCorr/fTimeStep + 0.5);
 313                         if( l > shift && l < (fMaxNofSamples-shift) )
 314                             peakpos = Map()->GetHitIndex( idx, l+shift );
 315                         else
 316                             peakpos = Map()->GetHitIndex( idx, l );
 317                         if( peakpos < 0) peakpos = Map()->GetHitIndex(idx,l);
 318                     } // end if fadc
 319                 }else{ // end fadc>0
 320                     if( on == kTRUE ){
 321                         if( nTsteps > 2 ){
 322                             //  min # of timesteps for a RawCluster
 323                             // Found a RawCluster...
 324                             Int_t stop = l-1;
 325                             time /= (charge/fTimeStep);   // ns
 326                                 // time = lmax*fTimeStep;   // ns
 327                             if( time > fTimeCorr ) time -= fTimeCorr;   // ns
 328                             Double_t anodePath =(anode-fNofAnodes/2)*anodePitch;
 329
 330                             Double_t driftPath = (Double_t)cal->GetDriftPath(time,anodePath);
 331                             driftPath = fSddLength-driftPath;
 332                             AliITSRawClusterSDD clust(j+1,anode,time,charge,
 333                                                       fmax, peakpos,0.,0.,
 334                                                       driftPath,anodePath,
 335                                                       nTsteps,start,stop,
 336                                                       start, stop, 1, k, k );
 337                             fDetTypeRec->AddCluster( 1, &clust );
 338                             if(AliDebugLevel()>=5) clust.PrintInfo();
 339                             nClu++;
 340                         } // end if nTsteps
 341                         on = kFALSE;
 342                     } // end if on==kTRUE
 343                 } // end if fadc>0
 344             } // samples
 345         } // anodes
 346     } // wings
 347     AliDebug(3,Form("# Rawclusters %d",nClu));
 348     return;
 349 }
 350 //_______________________________________________________________________
 351 Int_t AliITSClusterFinderSDD::SearchPeak(Double_t *spect,Int_t xdim,Int_t zdim,
 352                                          Int_t *peakX, Int_t *peakZ,
 353                                          Double_t *peakAmp, Double_t minpeak ){
 354     // search peaks on a 2D cluster
 355     Int_t npeak = 0;    // # peaks
 356     Int_t i,j;
 357     // search peaks
 358     for( Int_t z=1; z<zdim-1; z++ ){
 359         for( Int_t x=1; x<xdim-2; x++ ){
 360             Double_t sxz = spect[x*zdim+z];
 361             Double_t sxz1 = spect[(x+1)*zdim+z];
 362             Double_t sxz2 = spect[(x-1)*zdim+z];
 363             // search a local max. in s[x,z]
 364             if( sxz < minpeak || sxz1 <= 0 || sxz2 <= 0 ) continue;
 365             if( sxz >= spect[(x+1)*zdim+z  ] && sxz >= spect[(x-1)*zdim+z  ] &&
 366                 sxz >= spect[x*zdim    +z+1] && sxz >= spect[x*zdim    +z-1] &&
 367                 sxz >= spect[(x+1)*zdim+z+1] && sxz >= spect[(x+1)*zdim+z-1] &&
 368                 sxz >= spect[(x-1)*zdim+z+1] && sxz >= spect[(x-1)*zdim+z-1] ){
 369                 // peak found
 370                 peakX[npeak] = x;
 371                 peakZ[npeak] = z;
 372                 peakAmp[npeak] = sxz;
 373                 npeak++;
 374             } // end if ....
 375         } // end for x
 376     } // end for z
 377     // search groups of peaks with same amplitude.
 378     Int_t *flag = new Int_t[npeak];
 379     for( i=0; i<npeak; i++ ) flag[i] = 0;
 380     for( i=0; i<npeak; i++ ){
 381         for( j=0; j<npeak; j++ ){
 382             if( i==j) continue;
 383             if( flag[j] > 0 ) continue;
 384             if( peakAmp[i] == peakAmp[j] &&
 385                 TMath::Abs(peakX[i]-peakX[j])<=1 &&
 386                 TMath::Abs(peakZ[i]-peakZ[j])<=1 ){
 387                 if( flag[i] == 0) flag[i] = i+1;
 388                 flag[j] = flag[i];
 389             } // end if ...
 390         } // end for j
 391     } // end for i
 392     // make average of peak groups
 393     for( i=0; i<npeak; i++ ){
 394         Int_t nFlag = 1;
 395         if( flag[i] <= 0 ) continue;
 396         for( j=0; j<npeak; j++ ){
 397             if( i==j ) continue;
 398             if( flag[j] != flag[i] ) continue;
 399             peakX[i] += peakX[j];
 400             peakZ[i] += peakZ[j];
 401             nFlag++;
 402             npeak--;
 403             for( Int_t k=j; k<npeak; k++ ){
 404                 peakX[k] = peakX[k+1];
 405                 peakZ[k] = peakZ[k+1];
 406                 peakAmp[k] = peakAmp[k+1];
 407                 flag[k] = flag[k+1];
 408             } // end for k
 409             j--;
 410         } // end for j
 411         if( nFlag > 1 ){
 412             peakX[i] /= nFlag;
 413             peakZ[i] /= nFlag;
 414         } // end fi nFlag
 415     } // end for i
 416     delete [] flag;
 417     return( npeak );
 418 }
 419 //______________________________________________________________________
 420 void AliITSClusterFinderSDD::PeakFunc( Int_t xdim, Int_t zdim, Double_t *par,
 421                                        Double_t *spe, Double_t *integral){
 422     // function used to fit the clusters
 423     // par -> parameters..
 424     // par[0]  number of peaks.
 425     // for each peak i=1, ..., par[0]
 426     //                 par[i] = Ampl.
 427     //                 par[i+1] = xpos
 428     //                 par[i+2] = zpos
 429     //                 par[i+3] = tau
 430     //                 par[i+4] = sigma.
 431     Int_t electronics = GetResp(fModule)->GetElectronics(); // 1 = PASCAL, 2 = OLA
 432     const Int_t knParam = 5;
 433     Int_t npeak = (Int_t)par[0];
 434
 435     memset( spe, 0, sizeof( Double_t )*zdim*xdim );
 436
 437     Int_t k = 1;
 438     for( Int_t i=0; i<npeak; i++ ){
 439         if( integral != 0 ) integral[i] = 0.;
 440         Double_t sigmaA2 = par[k+4]*par[k+4]*2.;
 441         Double_t t2 = par[k+3];   // PASCAL
 442         if( electronics == 2 ) { t2 *= t2; t2 *= 2; } // OLA
 443         for( Int_t z=0; z<zdim; z++ ){
 444             for( Int_t x=0; x<xdim; x++ ){
 445                 Double_t z2 = (z-par[k+2])*(z-par[k+2])/sigmaA2;
 446                 Double_t x2 = 0.;
 447                 Double_t signal = 0.;
 448                 if( electronics == 1 ){ // PASCAL
 449                     x2 = (x-par[k+1]+t2)/t2;
 450                     signal = (x2>0.) ? par[k]*x2*exp(-x2+1.-z2) :0.0; // RCCR2
 451                 //  signal =(x2>0.) ? par[k]*x2*x2*exp(-2*x2+2.-z2 ):0.0;//RCCR
 452                 }else if( electronics == 2 ) { // OLA
 453                     x2 = (x-par[k+1])*(x-par[k+1])/t2;
 454                     signal = par[k]  * exp( -x2 - z2 );
 455                 } else {
 456                     Warning("PeakFunc","Wrong SDD Electronics = %d",
 457                             electronics);
 458                     // exit( 1 );
 459                 } // end if electronicx
 460                 spe[x*zdim+z] += signal;
 461                 if( integral != 0 ) integral[i] += signal;
 462             } // end for x
 463         } // end for z
 464         k += knParam;
 465     } // end for i
 466     return;
 467 }
 468 //__________________________________________________________________________
 469 Double_t AliITSClusterFinderSDD::ChiSqr( Int_t xdim, Int_t zdim, Double_t *spe,
 470                                         Double_t *speFit ) const{
 471     // EVALUATES UNNORMALIZED CHI-SQUARED
 472     Double_t chi2 = 0.;
 473     for( Int_t z=0; z<zdim; z++ ){
 474         for( Int_t x=1; x<xdim-1; x++ ){
 475             Int_t index = x*zdim+z;
 476             Double_t tmp = spe[index] - speFit[index];
 477             chi2 += tmp*tmp;
 478         } // end for x
 479     } // end for z
 480     return( chi2 );
 481 }
 482 //_______________________________________________________________________
 483 void AliITSClusterFinderSDD::Minim( Int_t xdim, Int_t zdim, Double_t *param,
 484                                     Double_t *prm0,Double_t *steprm,
 485                                     Double_t *chisqr,Double_t *spe,
 486                                     Double_t *speFit ){
 487     //
 488     Int_t   k, nnn, mmm, i;
 489     Double_t p1, delta, d1, chisq1, p2, chisq2, t, p3, chisq3, a, b, p0, chisqt;
 490     const Int_t knParam = 5;
 491     Int_t npeak = (Int_t)param[0];
 492     for( k=1; k<(npeak*knParam+1); k++ ) prm0[k] = param[k];
 493     for( k=1; k<(npeak*knParam+1); k++ ){
 494         p1 = param[k];
 495         delta = steprm[k];
 496         d1 = delta;
 497         // ENSURE THAT STEP SIZE IS SENSIBLY LARGER THAN MACHINE ROUND OFF
 498         if( TMath::Abs( p1 ) > 1.0E-6 )
 499             if ( TMath::Abs( delta/p1 ) < 1.0E-4 ) delta = p1/1000;
 500             else  delta = (Double_t)1.0E-4;
 501         //  EVALUATE CHI-SQUARED AT FIRST TWO SEARCH POINTS
 502         PeakFunc( xdim, zdim, param, speFit );
 503         chisq1 = ChiSqr( xdim, zdim, spe, speFit );
 504         p2 = p1+delta;
 505         param[k] = p2;
 506         PeakFunc( xdim, zdim, param, speFit );
 507         chisq2 = ChiSqr( xdim, zdim, spe, speFit );
 508         if( chisq1 < chisq2 ){
 509             // REVERSE DIRECTION OF SEARCH IF CHI-SQUARED IS INCREASING
 510             delta = -delta;
 511             t = p1;
 512             p1 = p2;
 513             p2 = t;
 514             t = chisq1;
 515             chisq1 = chisq2;
 516             chisq2 = t;
 517         } // end if
 518         i = 1; nnn = 0;
 519         do {   // INCREMENT param(K) UNTIL CHI-SQUARED STARTS TO INCREASE
 520             nnn++;
 521             p3 = p2 + delta;
 522             mmm = nnn - (nnn/5)*5;  // multiplo de 5
 523             if( mmm == 0 ){
 524                 d1 = delta;
 525                 // INCREASE STEP SIZE IF STEPPING TOWARDS MINIMUM IS TOO SLOW
 526                 delta *= 5;
 527             } // end if
 528             param[k] = p3;
 529             // Constrain paramiters
 530             Int_t kpos = (k-1) % knParam;
 531             switch( kpos ){
 532             case 0 :
 533                 if( param[k] <= 20 ) param[k] = fMinPeak;
 534                 break;
 535             case 1 :
 536                 if( TMath::Abs( param[k] - prm0[k] ) > 1.5 ) param[k] = prm0[k];
 537                 break;
 538             case 2 :
 539                 if( TMath::Abs( param[k] - prm0[k] ) > 1. ) param[k] = prm0[k];
 540                 break;
 541             case 3 :
 542                 if( param[k] < .5 ) param[k] = .5;
 543                 break;
 544             case 4 :
 545                 if( param[k] < .288 ) param[k] = .288;// 1/sqrt(12) = 0.288
 546                 if( param[k] > zdim*.5 ) param[k] = zdim*.5;
 547                 break;
 548             }; // end switch
 549             PeakFunc( xdim, zdim, param, speFit );
 550             chisq3 = ChiSqr( xdim, zdim, spe, speFit );
 551             if( chisq3 < chisq2 && nnn < 50 ){
 552                 p1 = p2;
 553                 p2 = p3;
 554                 chisq1 = chisq2;
 555                 chisq2 = chisq3;
 556             }else i=0;
 557         } while( i );
 558         // FIND MINIMUM OF PARABOLA DEFINED BY LAST THREE POINTS
 559         a = chisq1*(p2-p3)+chisq2*(p3-p1)+chisq3*(p1-p2);
 560         b = chisq1*(p2*p2-p3*p3)+chisq2*(p3*p3-p1*p1)+chisq3*(p1*p1-p2*p2);
 561         if( a!=0 ) p0 = (Double_t)(0.5*b/a);
 562         else p0 = 10000;
 563         //--IN CASE OF NEARLY EQUAL CHI-SQUARED AND TOO SMALL STEP SIZE PREVENT
 564         //   ERRONEOUS EVALUATION OF PARABOLA MINIMUM
 565         //---NEXT TWO LINES CAN BE OMITTED FOR HIGHER PRECISION MACHINES
 566         //dp = (Double_t) max (TMath::Abs(p3-p2), TMath::Abs(p2-p1));
 567         //if( TMath::Abs( p2-p0 ) > dp ) p0 = p2;
 568         param[k] = p0;
 569         // Constrain paramiters
 570         Int_t kpos = (k-1) % knParam;
 571         switch( kpos ){
 572         case 0 :
 573             if( param[k] <= 20 ) param[k] = fMinPeak;
 574             break;
 575         case 1 :
 576             if( TMath::Abs( param[k] - prm0[k] ) > 1.5 ) param[k] = prm0[k];
 577             break;
 578         case 2 :
 579             if( TMath::Abs( param[k] - prm0[k] ) > 1. ) param[k] = prm0[k];
 580             break;
 581         case 3 :
 582             if( param[k] < .5 ) param[k] = .5;
 583             break;
 584         case 4 :
 585             if( param[k] < .288 ) param[k] = .288;  // 1/sqrt(12) = 0.288
 586             if( param[k] > zdim*.5 ) param[k] = zdim*.5;
 587             break;
 588         }; // end switch
 589         PeakFunc( xdim, zdim, param, speFit );
 590         chisqt = ChiSqr( xdim, zdim, spe, speFit );
 591         // DO NOT ALLOW ERRONEOUS INTERPOLATION
 592         if( chisqt <= *chisqr ) *chisqr = chisqt;
 593         else param[k] = prm0[k];
 594         // OPTIMIZE SEARCH STEP FOR EVENTUAL NEXT CALL OF MINIM
 595         steprm[k] = (param[k]-prm0[k])/5;
 596         if( steprm[k] >= d1 ) steprm[k] = d1/5;
 597     } // end for k
 598     // EVALUATE FIT AND CHI-SQUARED FOR OPTIMIZED PARAMETERS
 599     PeakFunc( xdim, zdim, param, speFit );
 600     *chisqr = ChiSqr( xdim, zdim, spe, speFit );
 601     return;
 602 }
 603 //_________________________________________________________________________
 604 Int_t AliITSClusterFinderSDD::NoLinearFit( Int_t xdim, Int_t zdim,
 605                                            Double_t *param, Double_t *spe,
 606                                            Int_t *niter, Double_t *chir ){
 607     // fit method from Comput. Phys. Commun 46(1987) 149
 608     const Double_t kchilmt = 0.01;  //        relative accuracy
 609     const Int_t   knel = 3;        //        for parabolic minimization
 610     const Int_t   knstop = 50;     //        Max. iteration number
 611     const Int_t   knParam = 5;
 612     Int_t npeak = (Int_t)param[0];
 613     // RETURN IF NUMBER OF DEGREES OF FREEDOM IS NOT POSITIVE
 614     if( (xdim*zdim - npeak*knParam) <= 0 ) return( -1 );
 615     Double_t degFree = (xdim*zdim - npeak*knParam)-1;
 616     Int_t   n, k, iterNum = 0;
 617     Double_t *prm0 = new Double_t[npeak*knParam+1];
 618     Double_t *step = new Double_t[npeak*knParam+1];
 619     Double_t *schi = new Double_t[npeak*knParam+1];
 620     Double_t *sprm[3];
 621     sprm[0] = new Double_t[npeak*knParam+1];
 622     sprm[1] = new Double_t[npeak*knParam+1];
 623     sprm[2] = new Double_t[npeak*knParam+1];
 624     Double_t  chi0, chi1, reldif, a, b, prmin, dp;
 625     Double_t *speFit = new Double_t[ xdim*zdim ];
 626     PeakFunc( xdim, zdim, param, speFit );
 627     chi0 = ChiSqr( xdim, zdim, spe, speFit );
 628     chi1 = chi0;
 629     for( k=1; k<(npeak*knParam+1); k++) prm0[k] = param[k];
 630         for( k=1 ; k<(npeak*knParam+1); k+=knParam ){
 631             step[k] = param[k] / 20.0 ;
 632             step[k+1] = param[k+1] / 50.0;
 633             step[k+2] = param[k+2] / 50.0;
 634             step[k+3] = param[k+3] / 20.0;
 635             step[k+4] = param[k+4] / 20.0;
 636         } // end for k
 637     Int_t out = 0;
 638     do{
 639         iterNum++;
 640             chi0 = chi1;
 641             Minim( xdim, zdim, param, prm0, step, &chi1, spe, speFit );
 642             reldif = ( chi1 > 0 ) ? ((Double_t) TMath::Abs( chi1-chi0)/chi1 ) : 0;
 643         // EXIT conditions
 644         if( reldif < (float) kchilmt ){
 645             *chir  = (chi1>0) ? (float) TMath::Sqrt (chi1/degFree) :0;
 646             *niter = iterNum;
 647             out = 0;
 648             break;
 649         } // end if
 650         if( (reldif < (float)(5*kchilmt)) && (iterNum > knstop) ){
 651             *chir = (chi1>0) ?(float) TMath::Sqrt (chi1/degFree):0;
 652             *niter = iterNum;
 653             out = 0;
 654             break;
 655         } // end if
 656         if( iterNum > 5*knstop ){
 657             *chir  = (chi1>0) ?(float) TMath::Sqrt (chi1/degFree):0;
 658             *niter = iterNum;
 659             out = 1;
 660             break;
 661         } // end if
 662         if( iterNum <= knel ) continue;
 663         n = iterNum - (iterNum/knel)*knel; // EXTRAPOLATION LIMIT COUNTER N
 664         if( n > 3 || n == 0 ) continue;
 665         schi[n-1] = chi1;
 666         for( k=1; k<(npeak*knParam+1); k++ ) sprm[n-1][k] = param[k];
 667         if( n != 3 ) continue;
 668         // -EVALUATE EXTRAPOLATED VALUE OF EACH PARAMETER BY FINDING MINIMUM OF
 669         //    PARABOLA DEFINED BY LAST THREE CALLS OF MINIM
 670         for( k=1; k<(npeak*knParam+1); k++ ){
 671             Double_t tmp0 = sprm[0][k];
 672             Double_t tmp1 = sprm[1][k];
 673             Double_t tmp2 = sprm[2][k];
 674             a  = schi[0]*(tmp1-tmp2) + schi[1]*(tmp2-tmp0);
 675             a += (schi[2]*(tmp0-tmp1));
 676             b  = schi[0]*(tmp1*tmp1-tmp2*tmp2);
 677             b += (schi[1]*(tmp2*tmp2-tmp0*tmp0)+(schi[2]*
 678                                              (tmp0*tmp0-tmp1*tmp1)));
 679             if ((double)a < 1.0E-6) prmin = 0;
 680             else prmin = (float) (0.5*b/a);
 681             dp = 5*(tmp2-tmp0);
 682             if( TMath::Abs(prmin-tmp2) > TMath::Abs(dp) ) prmin = tmp2+dp;
 683             param[k] = prmin;
 684             step[k]  = dp/10; // OPTIMIZE SEARCH STEP
 685         } // end for k
 686     } while( kTRUE );
 687     delete [] prm0;
 688     delete [] step;
 689     delete [] schi;
 690     delete [] sprm[0];
 691     delete [] sprm[1];
 692     delete [] sprm[2];
 693     delete [] speFit;
 694     return( out );
 695 }
 696
 697 //______________________________________________________________________
 698 void AliITSClusterFinderSDD::ResolveClusters(){
 699     // The function to resolve clusters if the clusters overlapping exists
 700     Int_t i;
 701     // get number of clusters for this module
 702     Int_t nofClusters = NClusters();
 703     nofClusters -= fNclusters;
 704     Int_t fNofMaps = GetSeg()->Npz();
 705     Int_t fNofAnodes = fNofMaps/2;
 706     //Int_t fMaxNofSamples = GetSeg()->Npx();
 707     Int_t dummy=0;
 708     Double_t fTimeStep = GetSeg()->Dpx( dummy );
 709     Double_t fSddLength = GetSeg()->Dx();
 710     Double_t anodePitch = GetSeg()->Dpz( dummy );
 711     Int_t electronics =GetResp(fModule)->GetElectronics(); // 1 = PASCAL, 2 = OLA
 712     AliITSCalibrationSDD* cal = (AliITSCalibrationSDD*)GetResp(fModule);
 713     AliITSresponseSDD* res  = (AliITSresponseSDD*)cal->GetResponse();
 714     const char *option=res->ZeroSuppOption();
 715
 716
 717     for( Int_t j=0; j<nofClusters; j++ ){
 718         // get cluster information
 719         AliITSRawClusterSDD *clusterJ=(AliITSRawClusterSDD*) Cluster(j);
 720         Int_t astart = clusterJ->Astart();
 721         Int_t astop = clusterJ->Astop();
 722         Int_t tstart = clusterJ->Tstartf();
 723         Int_t tstop = clusterJ->Tstopf();
 724         Int_t wing = (Int_t)clusterJ->W();
 725         if( wing == 2 ){
 726             astart += fNofAnodes;
 727             astop  += fNofAnodes;
 728         } // end if
 729         Int_t xdim = tstop-tstart+3;
 730         Int_t zdim = astop-astart+3;
 731         if( xdim > 50 || zdim > 30 ) {
 732             Warning("ResolveClusters","xdim: %d , zdim: %d ",xdim,zdim);
 733             continue;
 734         }
 735         Double_t *sp = new Double_t[ xdim*zdim+1 ];
 736         memset( sp, 0, sizeof(Double_t)*(xdim*zdim+1) );
 737
 738         // make a local map from cluster region
 739         for( Int_t ianode=astart; ianode<=astop; ianode++ ){
 740             for( Int_t itime=tstart; itime<=tstop; itime++ ){
 741                 Double_t fadc = Map()->GetSignal( ianode, itime );
 742                 if(!((strstr(option,"1D")) || (strstr(option,"2D")))){
 743                   Double_t baseline=GetResp(fModule)->GetBaseline(ianode);
 744                   if( fadc > baseline ) fadc -= (Double_t)baseline;
 745                   else fadc = 0.;
 746                 }
 747                 Int_t index = (itime-tstart+1)*zdim+(ianode-astart+1);
 748                 sp[index] = fadc;
 749             } // time loop
 750         } // anode loop
 751
 752         // search peaks on cluster
 753         const Int_t kNp = 150;
 754         Int_t peakX1[kNp];
 755         Int_t peakZ1[kNp];
 756         Double_t peakAmp1[kNp];
 757         Int_t npeak = SearchPeak(sp,xdim,zdim,peakX1,peakZ1,peakAmp1,fMinPeak);
 758
 759         // if multiple peaks, split cluster
 760         if( npeak >= 1 ){
 761             //        cout << "npeak " << npeak << endl;
 762             //        clusterJ->PrintInfo();
 763             Double_t *par = new Double_t[npeak*5+1];
 764             par[0] = (Double_t)npeak;
 765             // Initial parameters in cell dimentions
 766             Int_t k1 = 1;
 767             for( i=0; i<npeak; i++ ){
 768                 par[k1] = peakAmp1[i];
 769                 par[k1+1] = peakX1[i]; // local time pos. [timebin]
 770                 par[k1+2] = peakZ1[i]; // local anode pos. [anodepitch]
 771                 if( electronics == 1 ) par[k1+3] = 2.; // PASCAL
 772                 else if(electronics==2) par[k1+3] = 0.7;//tau [timebin] OLA
 773                 par[k1+4] = .4;    // sigma        [anodepich]
 774                 k1 += 5;
 775             } // end for i
 776             Int_t niter;
 777             Double_t chir;
 778             NoLinearFit( xdim, zdim, par, sp, &niter, &chir );
 779             Double_t peakX[kNp];
 780             Double_t peakZ[kNp];
 781             Double_t sigma[kNp];
 782             Double_t tau[kNp];
 783             Double_t peakAmp[kNp];
 784             Double_t integral[kNp];
 785             //get integrals => charge for each peak
 786             PeakFunc( xdim, zdim, par, sp, integral );
 787             k1 = 1;
 788             for( i=0; i<npeak; i++ ){
 789                 peakAmp[i] = par[k1];
 790                 peakX[i]   = par[k1+1];
 791                 peakZ[i]   = par[k1+2];
 792                 tau[i]     = par[k1+3];
 793                 sigma[i]   = par[k1+4];
 794                 k1+=5;
 795             } // end for i
 796             // calculate parameter for new clusters
 797             for( i=0; i<npeak; i++ ){
 798                 AliITSRawClusterSDD clusterI( *clusterJ );
 799
 800                 Int_t newAnode = peakZ1[i]-1 + astart;
 801
 802             //    Int_t newiTime = peakX1[i]-1 + tstart;
 803             //    Int_t shift = (Int_t)(fTimeCorr/fTimeStep + 0.5);
 804             //    if( newiTime > shift && newiTime < (fMaxNofSamples-shift) )
 805             //        shift = 0;
 806             //    Int_t peakpos = Map()->GetHitIndex(newAnode,newiTime+shift );
 807             //    clusterI.SetPeakPos( peakpos );
 808
 809                 clusterI.SetPeakAmpl( peakAmp1[i] );
 810                 Double_t newAnodef = peakZ[i] - 0.5 + astart;
 811                 Double_t newiTimef = peakX[i] - 1 + tstart;
 812                 if( wing == 2 ) newAnodef -= fNofAnodes;
 813                 Double_t anodePath = (newAnodef - fNofAnodes/2)*anodePitch;
 814                 newiTimef *= fTimeStep;
 815                 if( newiTimef > fTimeCorr ) newiTimef -= fTimeCorr;
 816                 if( electronics == 1 ){
 817                 //    newiTimef *= 0.999438;    // PASCAL
 818                 //    newiTimef += (6./fDriftSpeed - newiTimef/3000.);
 819                 }else if( electronics == 2 )
 820                     newiTimef *= 0.99714;    // OLA
 821
 822                 Int_t timeBin = (Int_t)(newiTimef/fTimeStep+0.5);
 823                 Int_t peakpos = Map()->GetHitIndex( newAnode, timeBin );
 824                 if( peakpos < 0 ) {
 825                     for( Int_t ii=0; ii<3; ii++ ) {
 826                         peakpos = Map()->GetHitIndex( newAnode, timeBin+ii );
 827                         if( peakpos > 0 ) break;
 828                         peakpos = Map()->GetHitIndex( newAnode, timeBin-ii );
 829                         if( peakpos > 0 ) break;
 830                     }
 831                 }
 832
 833                 if( peakpos < 0 ) {
 834                     //Warning("ResolveClusters",
 835                     //        "Digit not found for cluster");
 836                     //if(AliDebugLevel()>=3) clusterI.PrintInfo();
 837                    continue;
 838                 }
 839                 clusterI.SetPeakPos( peakpos );
 840                 Float_t dp = cal->GetDriftPath(newiTimef,anodePath);
 841                 Double_t driftPath = fSddLength - (Double_t)dp;
 842                 Double_t sign = ( wing == 1 ) ? -1. : 1.;
 843                 Double_t xcoord = driftPath*sign * 0.0001;
 844                 Double_t zcoord = anodePath * 0.0001;
 845                 CorrectPosition(zcoord,xcoord);
 846                 clusterI.SetX( xcoord );
 847                 clusterI.SetZ( zcoord );
 848                 clusterI.SetAnode( newAnodef );
 849                 clusterI.SetTime( newiTimef );
 850                 clusterI.SetAsigma( sigma[i]*anodePitch );
 851                 clusterI.SetTsigma( tau[i]*fTimeStep );
 852                 clusterI.SetQ( integral[i] );
 853
 854                 fDetTypeRec->AddCluster( 1, &clusterI );
 855             } // end for i
 856             Clusters()->RemoveAt( j );
 857             delete [] par;
 858         } else {  // something odd
 859             Warning( "ResolveClusters",
 860                      "--- Peak not found!!!!  minpeak=%d ,cluster peak= %f"
 861                      " , module= %d",
 862                      fMinPeak, clusterJ->PeakAmpl(),GetModule());
 863             clusterJ->PrintInfo();
 864             Warning( "ResolveClusters"," xdim= %d zdim= %d", xdim-2, zdim-2 );
 865         }
 866         delete [] sp;
 867     } // cluster loop
 868     Clusters()->Compress();
 869 //    Map()->ClearMap();
 870 }
 871 //________________________________________________________________________
 872 void  AliITSClusterFinderSDD::GroupClusters(){
 873     // group clusters
 874     Int_t dummy=0;
 875     Double_t fTimeStep = GetSeg()->Dpx(dummy);
 876     // get number of clusters for this module
 877     Int_t nofClusters = NClusters();
 878     nofClusters -= fNclusters;
 879     AliITSRawClusterSDD *clusterI;
 880     AliITSRawClusterSDD *clusterJ;
 881     Int_t *label = new Int_t [nofClusters];
 882     Int_t i,j;
 883     for(i=0; i<nofClusters; i++) label[i] = 0;
 884     for(i=0; i<nofClusters; i++) {
 885         if(label[i] != 0) continue;
 886         for(j=i+1; j<nofClusters; j++) {
 887             if(label[j] != 0) continue;
 888             clusterI = (AliITSRawClusterSDD*) Cluster(i);
 889             clusterJ = (AliITSRawClusterSDD*) Cluster(j);
 890             // 1.3 good
 891             if(clusterI->T() < fTimeStep*60) fDAnode = 4.2;  // TB 3.2
 892             if(clusterI->T() < fTimeStep*10) fDAnode = 1.5;  // TB 1.
 893             Bool_t pair = clusterI->Brother(clusterJ,fDAnode,fDTime);
 894             if(!pair) continue;
 895             if(AliDebugLevel()>=4){
 896                 clusterI->PrintInfo();
 897                 clusterJ->PrintInfo();
 898             } // end if AliDebugLevel
 899             clusterI->Add(clusterJ);
 900             label[j] = 1;
 901             Clusters()->RemoveAt(j);
 902             j=i; // <- Ernesto
 903         } // J clusters
 904         label[i] = 1;
 905     } // I clusters
 906     Clusters()->Compress();
 907
 908     delete [] label;
 909     return;
 910 }
 911 //________________________________________________________________________
 912 void AliITSClusterFinderSDD::SelectClusters(){
 913     // get number of clusters for this module
 914     Int_t nofClusters = NClusters();
 915
 916     nofClusters -= fNclusters;
 917     Int_t i;
 918     for(i=0; i<nofClusters; i++) {
 919         AliITSRawClusterSDD *clusterI =(AliITSRawClusterSDD*) Cluster(i);
 920         Int_t rmflg = 0;
 921         Double_t wy = 0.;
 922         if(clusterI->Anodes() != 0.) {
 923             wy = ((Double_t) clusterI->Samples())/clusterI->Anodes();
 924         } // end if
 925         Int_t amp = (Int_t) clusterI->PeakAmpl();
 926         Int_t cha = (Int_t) clusterI->Q();
 927         if(amp < fMinPeak) rmflg = 1;
 928         if(cha < fMinCharge) rmflg = 1;
 929         if(wy < fMinNCells) rmflg = 1;
 930         //if(wy > fMaxNCells) rmflg = 1;
 931         if(rmflg) Clusters()->RemoveAt(i);
 932     } // I clusters
 933     Clusters()->Compress();
 934     return;
 935 }
 936
 937 //______________________________________________________________________
 938 void AliITSClusterFinderSDD::GetRecPoints(){
 939     // get rec points
 940
 941     // get number of clusters for this module
 942     Int_t nofClusters = NClusters();
 943     nofClusters -= fNclusters;
 944     const Double_t kconvGeV = 1.e-6; // GeV -> KeV
 945     const Double_t kconv = 1.0e-4;
 946     const Double_t kRMSx = 38.0*kconv; // microns->cm ITS TDR Table 1.3
 947     const Double_t kRMSz = 28.0*kconv; // microns->cm ITS TDR Table 1.3
 948     Int_t i;
 949     Int_t ix, iz, idx=-1;
 950     AliITSdigitSDD *dig=0;
 951     Int_t ndigits=NDigits();
 952
 953     Int_t lay,lad,det;
 954     fDetTypeRec->GetITSgeom()->GetModuleId(fModule,lay,lad,det);
 955     Int_t ind=(lad-1)*fDetTypeRec->GetITSgeom()->GetNdetectors(lay)+(det-1);
 956     Int_t lyr=(lay-1);
 957
 958
 959     for(i=0; i<nofClusters; i++) {
 960         AliITSRawClusterSDD *clusterI = (AliITSRawClusterSDD*)Cluster(i);
 961         if(!clusterI) Error("SDD: GetRecPoints","i clusterI ",i,clusterI);
 962         if(clusterI) idx=clusterI->PeakPos();
 963         if(idx>ndigits) Error("SDD: GetRecPoints","idx ndigits",idx,ndigits);
 964         // try peak neighbours - to be done
 965         if(idx&&idx<= ndigits) dig =(AliITSdigitSDD*)GetDigit(idx);
 966         if(!dig) {
 967             // try cog
 968             GetSeg()->GetPadIxz(clusterI->X(),clusterI->Z(),ix,iz);
 969             dig = (AliITSdigitSDD*)Map()->GetHit(iz-1,ix-1);
 970             // if null try neighbours
 971             if (!dig) dig = (AliITSdigitSDD*)Map()->GetHit(iz-1,ix);
 972             if (!dig) dig = (AliITSdigitSDD*)Map()->GetHit(iz-1,ix+1);
 973             if (!dig) printf("SDD: cannot assign the track number!\n");
 974         } //  end if !dig
 975
 976         Int_t lab[4] = {-3141593,-3141593,-3141593,ind};
 977         if (dig) {
 978           lab[0] = dig->GetTrack(0);
 979           lab[1] = dig->GetTrack(1);
 980           lab[2] = dig->GetTrack(2);
 981         }
 982         Float_t hit[5] = {clusterI->X(),clusterI->Z(),kRMSx*kRMSx,kRMSz*kRMSz,clusterI->Q()};
 983         Int_t info[3] = {0,0,lyr};
 984
 985         AliITSRecPoint rnew(lab,hit,info,kTRUE);
 986         rnew.SetdEdX(kconvGeV*clusterI->Q());
 987
 988         fDetTypeRec->AddRecPoint(rnew);
 989     } // I clusters
 990 //    Map()->ClearMap();
 991 }
 992 //______________________________________________________________________
 993 void AliITSClusterFinderSDD::FindRawClusters(Int_t mod){
 994     // find raw clusters
 995
 996     SetModule(mod);
 997     SetCutAmplitude(mod);
 998     Int_t nanodes=GetSeg()->Npz();
 999     Int_t noise=0;
1000     for(Int_t i=0;i<nanodes;i++){
1001       noise+=(Int_t)(((AliITSCalibrationSDD*)GetResp(mod))->GetNoiseAfterElectronics(i));
1002     }
1003     SetMinPeak((noise/nanodes)*5);
1004     Find1DClustersE();
1005     GroupClusters();
1006     SelectClusters();
1007     ResolveClusters();
1008     GetRecPoints();
1009 }
1010 //_______________________________________________________________________
1011 void AliITSClusterFinderSDD::PrintStatus() const{
1012     // Print SDD cluster finder Parameters
1013
1014     cout << "**************************************************" << endl;
1015     cout << " Silicon Drift Detector Cluster Finder Parameters " << endl;
1016     cout << "**************************************************" << endl;
1017     cout << "Number of Clusters: " << fNclusters << endl;
1018     cout << "Anode Tolerance: " << fDAnode << endl;
1019     cout << "Time  Tolerance: " << fDTime << endl;
1020     cout << "Time  correction (electronics): " << fTimeCorr << endl;
1021     cout << "Cut Amplitude (threshold): " << fCutAmplitude[0] << endl;
1022     cout << "Minimum Amplitude: " << fMinPeak << endl;
1023     cout << "Minimum Charge: " << fMinCharge << endl;
1024     cout << "Minimum number of cells/clusters: " << fMinNCells << endl;
1025     cout << "Maximum number of cells/clusters: " << fMaxNCells << endl;
1026     cout << "**************************************************" << endl;
1027 }
1028
1029 //_________________________________________________________________________
1030 void AliITSClusterFinderSDD::CorrectPosition(Double_t &z, Double_t&y){
1031   //correction of coordinates using the maps stored in the DB
1032
1033   AliITSCalibrationSDD* cal = (AliITSCalibrationSDD*)GetResp(fModule);
1034   static const Int_t nbint = cal->GetMapTimeNBin();
1035   static const Int_t nbina = cal->Chips()*cal->Channels();
1036   Float_t stepa = (GetSeg()->Dpz(0))/10000.; //anode pitch in cm
1037   Float_t stept = (GetSeg()->Dx()/cal->GetMapTimeNBin()/2.)/10.;
1038
1039   Int_t bint = TMath::Abs((Int_t)(y/stept));
1040   if(y>=0) bint+=(Int_t)(nbint/2.);
1041   if(bint>nbint) AliError("Wrong bin number!");
1042
1043   Int_t bina = TMath::Abs((Int_t)(z/stepa));
1044   if(z>=0) bina+=(Int_t)(nbina/2.);
1045   if(bina>nbina) AliError("Wrong bin number!");
1046
1047   Double_t devz = (Double_t)cal->GetMapACell(bina,bint)/10000.;
1048   Double_t devx = (Double_t)cal->GetMapTCell(bina,bint)/10000.;
1049   z+=devz;
1050   y+=devx;
1051
1052 }