1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
18 ///////////////////////////////////////////////////////////////////////////
22 //////////////////////////////////////////////////////////////////////////
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"
35 ClassImp(AliITSClusterFinderSDD)
37 //______________________________________________________________________
38 AliITSClusterFinderSDD::AliITSClusterFinderSDD():
39 AliITSClusterFinder(),
49 // default constructor
51 //______________________________________________________________________
52 AliITSClusterFinderSDD::AliITSClusterFinderSDD(AliITSDetTypeRec* dettyp,
55 AliITSClusterFinder(dettyp),
65 // standard constructor
69 SetCutAmplitude(fDetTypeRec->GetITSgeom()->GetStartSDD());
72 SetMinPeak((Int_t)((AliITSCalibrationSDD*)GetResp(fDetTypeRec->GetITSgeom()->GetStartSDD()))->GetNoiseAfterElectronics(0)*5);
77 SetMap(new AliITSMapA1(GetSeg(),Digits(),fCutAmplitude));
79 //______________________________________________________________________
80 void AliITSClusterFinderSDD::SetCutAmplitude(Int_t mod,Double_t nsigma){
81 // set the signal threshold for cluster finder
82 Double_t baseline,noiseAfterEl;
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);
94 baseline=GetResp(mod)->GetBaseline(ian);
95 fCutAmplitude[ian] = (Int_t)((baseline + nsigma*noiseAfterEl));
99 //______________________________________________________________________
100 void AliITSClusterFinderSDD::Find1DClusters(){
103 // retrieve the parameters
104 Int_t fNofMaps = GetSeg()->Npz();
105 Int_t fMaxNofSamples = GetSeg()->Npx();
106 Int_t fNofAnodes = fNofMaps/2;
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();
117 Map()->SetThresholdArr(fCutAmplitude);
120 Int_t nofFoundClusters = 0;
122 Double_t **dfadc = new Double_t*[fNofAnodes];
123 for(i=0;i<fNofAnodes;i++) dfadc[i] = new Double_t[fMaxNofSamples];
129 for(k=0;k<fNofAnodes;k++) {
130 idx = j*fNofAnodes+k;
131 // signal (fadc) & derivative (dfadc)
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;
140 for(k=0;k<fNofAnodes;k++) {
141 AliDebug(5,Form("Anode: %d, Wing: %d",k+1,j+1));
142 idx = j*fNofAnodes+k;
146 while(it <= fMaxNofSamples-3) {
150 Double_t fadcmax = 0.;
151 Double_t dfadcmax = 0.;
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];
168 if(Map()->TestHit(idx,imax) == kEmpty) {it++; continue;}
171 if(tstart < 0) tstart = 0;
173 if(lthrt >= lthrmint && lthra >= lthrmina) ilcl = 1;
176 Int_t tstop = tstart;
177 Double_t dfadcmin = 10000.;
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])) {
185 if(tstop > 255) tstop = 255;
186 dfadcmin = dfadc[k][it+ij];
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;
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;
204 clusterCharge += fadc;
205 // as a matter of fact we should take the peak
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);
217 clusterTime += fadc*its;
218 if(fadc > 0) clusterMult++;
220 clusterTime /= (clusterCharge/fTimeStep); // ns
221 if(clusterTime>fTimeCorr) clusterTime -=fTimeCorr;
226 Double_t clusteranodePath = (clusterAnode - fNofAnodes/2)*
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
234 clusterPeakAmplitude, //f
236 0.,0.,clusterDriftPath,//fff
237 clusteranodePath, //f
240 fDetTypeRec->AddCluster(1,&clust);
248 for(i=0;i<fNofAnodes;i++) delete[] dfadc[i];
253 //______________________________________________________________________
254 void AliITSClusterFinderSDD::Find1DClustersE(){
256 // retrieve the parameters
257 Int_t fNofMaps = GetSeg()->Npz();
258 Int_t fMaxNofSamples = GetSeg()->Npx();
259 Int_t fNofAnodes = fNofMaps/2;
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);
266 Map()->SetThresholdArr( fCutAmplitude );
269 AliITSresponseSDD* res = (AliITSresponseSDD*)cal->GetResponse();
270 const char *option=res->ZeroSuppOption();
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;
282 Double_t charge = 0.;
284 Double_t anode = k+0.5;
286 for( Int_t l=0; l<fMaxNofSamples; l++ ){
287 Double_t fadc = (Double_t)Map()->GetSignal( idx, l );
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;
302 if(!((strstr(option,"1D")) || (strstr(option,"2D")))){
303 Double_t baseline=GetResp(fModule)->GetBaseline(idx);
304 if( fadc > baseline ) fadc -= baseline;
312 Int_t shift = (Int_t)(fTimeCorr/fTimeStep + 0.5);
313 if( l > shift && l < (fMaxNofSamples-shift) )
314 peakpos = Map()->GetHitIndex( idx, l+shift );
316 peakpos = Map()->GetHitIndex( idx, l );
317 if( peakpos < 0) peakpos = Map()->GetHitIndex(idx,l);
322 // min # of timesteps for a RawCluster
323 // Found a RawCluster...
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;
330 Double_t driftPath = (Double_t)cal->GetDriftPath(time,anodePath);
331 driftPath = fSddLength-driftPath;
332 AliITSRawClusterSDD clust(j+1,anode,time,charge,
336 start, stop, 1, k, k );
337 fDetTypeRec->AddCluster( 1, &clust );
338 if(AliDebugLevel()>=5) clust.PrintInfo();
342 } // end if on==kTRUE
347 AliDebug(3,Form("# Rawclusters %d",nClu));
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
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] ){
372 peakAmp[npeak] = sxz;
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++ ){
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;
392 // make average of peak groups
393 for( i=0; i<npeak; i++ ){
395 if( flag[i] <= 0 ) continue;
396 for( j=0; j<npeak; j++ ){
398 if( flag[j] != flag[i] ) continue;
399 peakX[i] += peakX[j];
400 peakZ[i] += peakZ[j];
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];
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]
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];
435 memset( spe, 0, sizeof( Double_t )*zdim*xdim );
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;
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 );
456 Warning("PeakFunc","Wrong SDD Electronics = %d",
459 } // end if electronicx
460 spe[x*zdim+z] += signal;
461 if( integral != 0 ) integral[i] += signal;
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
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];
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,
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++ ){
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 );
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
519 do { // INCREMENT param(K) UNTIL CHI-SQUARED STARTS TO INCREASE
522 mmm = nnn - (nnn/5)*5; // multiplo de 5
525 // INCREASE STEP SIZE IF STEPPING TOWARDS MINIMUM IS TOO SLOW
529 // Constrain paramiters
530 Int_t kpos = (k-1) % knParam;
533 if( param[k] <= 20 ) param[k] = fMinPeak;
536 if( TMath::Abs( param[k] - prm0[k] ) > 1.5 ) param[k] = prm0[k];
539 if( TMath::Abs( param[k] - prm0[k] ) > 1. ) param[k] = prm0[k];
542 if( param[k] < .5 ) param[k] = .5;
545 if( param[k] < .288 ) param[k] = .288;// 1/sqrt(12) = 0.288
546 if( param[k] > zdim*.5 ) param[k] = zdim*.5;
549 PeakFunc( xdim, zdim, param, speFit );
550 chisq3 = ChiSqr( xdim, zdim, spe, speFit );
551 if( chisq3 < chisq2 && nnn < 50 ){
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);
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;
569 // Constrain paramiters
570 Int_t kpos = (k-1) % knParam;
573 if( param[k] <= 20 ) param[k] = fMinPeak;
576 if( TMath::Abs( param[k] - prm0[k] ) > 1.5 ) param[k] = prm0[k];
579 if( TMath::Abs( param[k] - prm0[k] ) > 1. ) param[k] = prm0[k];
582 if( param[k] < .5 ) param[k] = .5;
585 if( param[k] < .288 ) param[k] = .288; // 1/sqrt(12) = 0.288
586 if( param[k] > zdim*.5 ) param[k] = zdim*.5;
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;
598 // EVALUATE FIT AND CHI-SQUARED FOR OPTIMIZED PARAMETERS
599 PeakFunc( xdim, zdim, param, speFit );
600 *chisqr = ChiSqr( xdim, zdim, spe, speFit );
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];
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 );
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;
641 Minim( xdim, zdim, param, prm0, step, &chi1, spe, speFit );
642 reldif = ( chi1 > 0 ) ? ((Double_t) TMath::Abs( chi1-chi0)/chi1 ) : 0;
644 if( reldif < (float) kchilmt ){
645 *chir = (chi1>0) ? (float) TMath::Sqrt (chi1/degFree) :0;
650 if( (reldif < (float)(5*kchilmt)) && (iterNum > knstop) ){
651 *chir = (chi1>0) ?(float) TMath::Sqrt (chi1/degFree):0;
656 if( iterNum > 5*knstop ){
657 *chir = (chi1>0) ?(float) TMath::Sqrt (chi1/degFree):0;
662 if( iterNum <= knel ) continue;
663 n = iterNum - (iterNum/knel)*knel; // EXTRAPOLATION LIMIT COUNTER N
664 if( n > 3 || n == 0 ) continue;
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);
682 if( TMath::Abs(prmin-tmp2) > TMath::Abs(dp) ) prmin = tmp2+dp;
684 step[k] = dp/10; // OPTIMIZE SEARCH STEP
697 //______________________________________________________________________
698 void AliITSClusterFinderSDD::ResolveClusters(){
699 // The function to resolve clusters if the clusters overlapping exists
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();
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();
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();
726 astart += fNofAnodes;
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);
735 Double_t *sp = new Double_t[ xdim*zdim+1 ];
736 memset( sp, 0, sizeof(Double_t)*(xdim*zdim+1) );
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;
747 Int_t index = (itime-tstart+1)*zdim+(ianode-astart+1);
752 // search peaks on cluster
753 const Int_t kNp = 150;
756 Double_t peakAmp1[kNp];
757 Int_t npeak = SearchPeak(sp,xdim,zdim,peakX1,peakZ1,peakAmp1,fMinPeak);
759 // if multiple peaks, split cluster
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
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]
778 NoLinearFit( xdim, zdim, par, sp, &niter, &chir );
783 Double_t peakAmp[kNp];
784 Double_t integral[kNp];
785 //get integrals => charge for each peak
786 PeakFunc( xdim, zdim, par, sp, integral );
788 for( i=0; i<npeak; i++ ){
789 peakAmp[i] = par[k1];
790 peakX[i] = par[k1+1];
791 peakZ[i] = par[k1+2];
793 sigma[i] = par[k1+4];
796 // calculate parameter for new clusters
797 for( i=0; i<npeak; i++ ){
798 AliITSRawClusterSDD clusterI( *clusterJ );
800 Int_t newAnode = peakZ1[i]-1 + astart;
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) )
806 // Int_t peakpos = Map()->GetHitIndex(newAnode,newiTime+shift );
807 // clusterI.SetPeakPos( peakpos );
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
822 Int_t timeBin = (Int_t)(newiTimef/fTimeStep+0.5);
823 Int_t peakpos = Map()->GetHitIndex( newAnode, timeBin );
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;
834 //Warning("ResolveClusters",
835 // "Digit not found for cluster");
836 //if(AliDebugLevel()>=3) clusterI.PrintInfo();
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] );
854 fDetTypeRec->AddCluster( 1, &clusterI );
856 Clusters()->RemoveAt( j );
858 } else { // something odd
859 Warning( "ResolveClusters",
860 "--- Peak not found!!!! minpeak=%d ,cluster peak= %f"
862 fMinPeak, clusterJ->PeakAmpl(),GetModule());
863 clusterJ->PrintInfo();
864 Warning( "ResolveClusters"," xdim= %d zdim= %d", xdim-2, zdim-2 );
868 Clusters()->Compress();
869 // Map()->ClearMap();
871 //________________________________________________________________________
872 void AliITSClusterFinderSDD::GroupClusters(){
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];
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);
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);
895 if(AliDebugLevel()>=4){
896 clusterI->PrintInfo();
897 clusterJ->PrintInfo();
898 } // end if AliDebugLevel
899 clusterI->Add(clusterJ);
901 Clusters()->RemoveAt(j);
906 Clusters()->Compress();
911 //________________________________________________________________________
912 void AliITSClusterFinderSDD::SelectClusters(){
913 // get number of clusters for this module
914 Int_t nofClusters = NClusters();
916 nofClusters -= fNclusters;
918 for(i=0; i<nofClusters; i++) {
919 AliITSRawClusterSDD *clusterI =(AliITSRawClusterSDD*) Cluster(i);
922 if(clusterI->Anodes() != 0.) {
923 wy = ((Double_t) clusterI->Samples())/clusterI->Anodes();
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);
933 Clusters()->Compress();
937 //______________________________________________________________________
938 void AliITSClusterFinderSDD::GetRecPoints(){
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
949 Int_t ix, iz, idx=-1;
950 AliITSdigitSDD *dig=0;
951 Int_t ndigits=NDigits();
954 fDetTypeRec->GetITSgeom()->GetModuleId(fModule,lay,lad,det);
955 Int_t ind=(lad-1)*fDetTypeRec->GetITSgeom()->GetNdetectors(lay)+(det-1);
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);
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");
976 Int_t lab[4] = {-3141593,-3141593,-3141593,ind};
978 lab[0] = dig->GetTrack(0);
979 lab[1] = dig->GetTrack(1);
980 lab[2] = dig->GetTrack(2);
982 Float_t hit[5] = {clusterI->X(),clusterI->Z(),kRMSx*kRMSx,kRMSz*kRMSz,clusterI->Q()};
983 Int_t info[3] = {0,0,lyr};
985 AliITSRecPoint rnew(lab,hit,info,kTRUE);
986 rnew.SetdEdX(kconvGeV*clusterI->Q());
988 fDetTypeRec->AddRecPoint(rnew);
990 // Map()->ClearMap();
992 //______________________________________________________________________
993 void AliITSClusterFinderSDD::FindRawClusters(Int_t mod){
997 SetCutAmplitude(mod);
998 Int_t nanodes=GetSeg()->Npz();
1000 for(Int_t i=0;i<nanodes;i++){
1001 noise+=(Int_t)(((AliITSCalibrationSDD*)GetResp(mod))->GetNoiseAfterElectronics(i));
1003 SetMinPeak((noise/nanodes)*5);
1010 //_______________________________________________________________________
1011 void AliITSClusterFinderSDD::PrintStatus() const{
1012 // Print SDD cluster finder Parameters
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;
1029 //_________________________________________________________________________
1030 void AliITSClusterFinderSDD::CorrectPosition(Double_t &z, Double_t&y){
1031 //correction of coordinates using the maps stored in the DB
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.;
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!");
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!");
1047 Double_t devz = (Double_t)cal->GetMapACell(bina,bint)/10000.;
1048 Double_t devx = (Double_t)cal->GetMapTCell(bina,bint)/10000.;