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b0f5e3fc 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 **************************************************************************/
d86f531c 15/*
16 $Id$
d86f531c 17 */
04366a57 18///////////////////////////////////////////////////////////////////////////
19// Cluster finder //
20// for Silicon //
21// Drift Detector //
22//////////////////////////////////////////////////////////////////////////
bf3f2830 23
b0f5e3fc 24
25#include "AliITSClusterFinderSDD.h"
e8189707 26#include "AliITSMapA1.h"
41b19549 27#include "AliITSRawClusterSDD.h"
78a228db 28#include "AliITSRecPoint.h"
f77f13c8 29#include "AliITSdigitSDD.h"
7d62fb64 30#include "AliITSDetTypeRec.h"
fcf95fc7 31#include "AliITSCalibrationSDD.h"
f77f13c8 32#include "AliITSsegmentationSDD.h"
33#include "AliLog.h"
b0f5e3fc 34
b0f5e3fc 35ClassImp(AliITSClusterFinderSDD)
36
aacedc3e 37//______________________________________________________________________
38AliITSClusterFinderSDD::AliITSClusterFinderSDD():
39AliITSClusterFinder(),
40fNclusters(0),
41fDAnode(0.0),
42fDTime(0.0),
43fTimeCorr(0.0),
44fCutAmplitude(0),
45fMinPeak(0),
46fMinCharge(0),
47fMinNCells(0),
48fMaxNCells(0){
49 // default constructor
50}
42da2935 51//______________________________________________________________________
8ba39da9 52AliITSClusterFinderSDD::AliITSClusterFinderSDD(AliITSDetTypeRec* dettyp,
50d05d7b 53 TClonesArray *digits,
aacedc3e 54 TClonesArray *recp):
8ba39da9 55AliITSClusterFinder(dettyp),
aacedc3e 56fNclusters(0),
57fDAnode(0.0),
58fDTime(0.0),
59fTimeCorr(0.0),
60fCutAmplitude(0),
61fMinPeak(0),
62fMinCharge(0),
63fMinNCells(0),
64fMaxNCells(0){
42da2935 65 // standard constructor
78a228db 66
aacedc3e 67 SetDigits(digits);
68 SetClusters(recp);
8ba39da9 69 SetCutAmplitude(fDetTypeRec->GetITSgeom()->GetStartSDD());
b0f5e3fc 70 SetDAnode();
71 SetDTime();
f45f6658 72 SetMinPeak((Int_t)((AliITSCalibrationSDD*)GetResp(fDetTypeRec->GetITSgeom()->GetStartSDD()))->GetNoiseAfterElectronics(0)*5);
78a228db 73 SetMinNCells();
74 SetMaxNCells();
75 SetTimeCorr();
a1f090e0 76 SetMinCharge();
aacedc3e 77 SetMap(new AliITSMapA1(GetSeg(),Digits(),fCutAmplitude));
e8189707 78}
42da2935 79//______________________________________________________________________
8ba39da9 80void AliITSClusterFinderSDD::SetCutAmplitude(Int_t mod,Double_t nsigma){
42da2935 81 // set the signal threshold for cluster finder
f45f6658 82 Double_t baseline,noiseAfterEl;
42da2935 83
f45f6658 84
85 Int_t nanodes = GetResp(mod)->Wings()*GetResp(mod)->Channels()*GetResp(mod)->Chips();
86 fCutAmplitude.Set(nanodes);
87 for(Int_t ian=0;ian<nanodes;ian++){
88 baseline=GetResp(mod)->GetBaseline(ian);
89 noiseAfterEl = ((AliITSCalibrationSDD*)GetResp(mod))->GetNoiseAfterElectronics(ian);
90 fCutAmplitude[ian] = (Int_t)((baseline + nsigma*noiseAfterEl));
91 }
5dd4cc39 92}
42da2935 93//______________________________________________________________________
94void AliITSClusterFinderSDD::Find1DClusters(){
95 // find 1D clusters
a1f090e0 96
42da2935 97 // retrieve the parameters
aacedc3e 98 Int_t fNofMaps = GetSeg()->Npz();
99 Int_t fMaxNofSamples = GetSeg()->Npx();
b48af428 100 Int_t fNofAnodes = fNofMaps/2;
101 Int_t dummy = 0;
aacedc3e 102 Double_t fTimeStep = GetSeg()->Dpx(dummy);
103 Double_t fSddLength = GetSeg()->Dx();
aacedc3e 104 Double_t anodePitch = GetSeg()->Dpz(dummy);
404c1c29 105 AliITSCalibrationSDD* cal = (AliITSCalibrationSDD*)GetResp(fModule);
42da2935 106 // map the signal
aacedc3e 107 Map()->ClearMap();
f45f6658 108 Map()->SetThresholdArr(fCutAmplitude);
109 Map()->FillMap2();
a1f090e0 110
42da2935 111 Int_t nofFoundClusters = 0;
112 Int_t i;
aacedc3e 113 Double_t **dfadc = new Double_t*[fNofAnodes];
114 for(i=0;i<fNofAnodes;i++) dfadc[i] = new Double_t[fMaxNofSamples];
115 Double_t fadc = 0.;
116 Double_t fadc1 = 0.;
117 Double_t fadc2 = 0.;
42da2935 118 Int_t j,k,idx,l,m;
119 for(j=0;j<2;j++) {
50d05d7b 120 for(k=0;k<fNofAnodes;k++) {
121 idx = j*fNofAnodes+k;
122 // signal (fadc) & derivative (dfadc)
123 dfadc[k][255]=0.;
124 for(l=0; l<fMaxNofSamples; l++) {
aacedc3e 125 fadc2=(Double_t)Map()->GetSignal(idx,l);
126 if(l>0) fadc1=(Double_t)Map()->GetSignal(idx,l-1);
50d05d7b 127 if(l>0) dfadc[k][l-1] = fadc2-fadc1;
128 } // samples
129 } // anodes
42da2935 130
50d05d7b 131 for(k=0;k<fNofAnodes;k++) {
f77f13c8 132 AliDebug(5,Form("Anode: %d, Wing: %d",k+1,j+1));
50d05d7b 133 idx = j*fNofAnodes+k;
134 Int_t imax = 0;
135 Int_t imaxd = 0;
136 Int_t it = 0;
137 while(it <= fMaxNofSamples-3) {
138 imax = it;
139 imaxd = it;
140 // maximum of signal
aacedc3e 141 Double_t fadcmax = 0.;
142 Double_t dfadcmax = 0.;
50d05d7b 143 Int_t lthrmina = 1;
144 Int_t lthrmint = 3;
145 Int_t lthra = 1;
146 Int_t lthrt = 0;
147 for(m=0;m<20;m++) {
148 Int_t id = it+m;
149 if(id>=fMaxNofSamples) break;
aacedc3e 150 fadc=(float)Map()->GetSignal(idx,id);
50d05d7b 151 if(fadc > fadcmax) { fadcmax = fadc; imax = id;}
f45f6658 152 if(fadc > (float)fCutAmplitude[idx])lthrt++;
50d05d7b 153 if(dfadc[k][id] > dfadcmax) {
154 dfadcmax = dfadc[k][id];
155 imaxd = id;
156 } // end if
157 } // end for m
158 it = imaxd;
aacedc3e 159 if(Map()->TestHit(idx,imax) == kEmpty) {it++; continue;}
50d05d7b 160 // cluster charge
161 Int_t tstart = it-2;
162 if(tstart < 0) tstart = 0;
163 Bool_t ilcl = 0;
164 if(lthrt >= lthrmint && lthra >= lthrmina) ilcl = 1;
165 if(ilcl) {
166 nofFoundClusters++;
167 Int_t tstop = tstart;
aacedc3e 168 Double_t dfadcmin = 10000.;
50d05d7b 169 Int_t ij;
170 for(ij=0; ij<20; ij++) {
171 if(tstart+ij > 255) { tstop = 255; break; }
aacedc3e 172 fadc=(float)Map()->GetSignal(idx,tstart+ij);
50d05d7b 173 if((dfadc[k][tstart+ij] < dfadcmin) &&
f45f6658 174 (fadc > fCutAmplitude[idx])) {
50d05d7b 175 tstop = tstart+ij+5;
176 if(tstop > 255) tstop = 255;
177 dfadcmin = dfadc[k][it+ij];
178 } // end if
179 } // end for ij
42da2935 180
aacedc3e 181 Double_t clusterCharge = 0.;
182 Double_t clusterAnode = k+0.5;
183 Double_t clusterTime = 0.;
50d05d7b 184 Int_t clusterMult = 0;
aacedc3e 185 Double_t clusterPeakAmplitude = 0.;
50d05d7b 186 Int_t its,peakpos = -1;
f45f6658 187 //Double_t n, baseline;
188 //GetResp(fModule)->GetNoiseParam(n,baseline);
189 Double_t baseline=GetResp(fModule)->GetBaseline(idx);
190 for(its=tstart; its<=tstop; its++) {
aacedc3e 191 fadc=(float)Map()->GetSignal(idx,its);
50d05d7b 192 if(fadc>baseline) fadc -= baseline;
193 else fadc = 0.;
194 clusterCharge += fadc;
195 // as a matter of fact we should take the peak
196 // pos before FFT
197 // to get the list of tracks !!!
198 if(fadc > clusterPeakAmplitude) {
199 clusterPeakAmplitude = fadc;
aacedc3e 200 //peakpos=Map()->GetHitIndex(idx,its);
50d05d7b 201 Int_t shift = (int)(fTimeCorr/fTimeStep);
202 if(its>shift && its<(fMaxNofSamples-shift))
aacedc3e 203 peakpos = Map()->GetHitIndex(idx,its+shift);
204 else peakpos = Map()->GetHitIndex(idx,its);
205 if(peakpos<0) peakpos =Map()->GetHitIndex(idx,its);
50d05d7b 206 } // end if
207 clusterTime += fadc*its;
208 if(fadc > 0) clusterMult++;
209 if(its == tstop) {
210 clusterTime /= (clusterCharge/fTimeStep); // ns
211 if(clusterTime>fTimeCorr) clusterTime -=fTimeCorr;
212 //ns
213 } // end if
214 } // end for its
42da2935 215
aacedc3e 216 Double_t clusteranodePath = (clusterAnode - fNofAnodes/2)*
217 anodePitch;
404c1c29 218 Double_t clusterDriftPath = (Double_t)cal->GetDriftPath(clusterTime,clusteranodePath);
50d05d7b 219 clusterDriftPath = fSddLength-clusterDriftPath;
220 if(clusterCharge <= 0.) break;
221 AliITSRawClusterSDD clust(j+1,//i
222 clusterAnode,clusterTime,//ff
223 clusterCharge, //f
224 clusterPeakAmplitude, //f
225 peakpos, //i
226 0.,0.,clusterDriftPath,//fff
227 clusteranodePath, //f
228 clusterMult, //i
229 0,0,0,0,0,0,0);//7*i
7d62fb64 230 fDetTypeRec->AddCluster(1,&clust);
50d05d7b 231 it = tstop;
232 } // ilcl
233 it++;
234 } // while (samples)
235 } // anodes
42da2935 236 } // detectors (2)
42da2935 237
238 for(i=0;i<fNofAnodes;i++) delete[] dfadc[i];
239 delete [] dfadc;
a1f090e0 240
42da2935 241 return;
a1f090e0 242}
42da2935 243//______________________________________________________________________
244void AliITSClusterFinderSDD::Find1DClustersE(){
24a1c341 245 // find 1D clusters
42da2935 246 // retrieve the parameters
aacedc3e 247 Int_t fNofMaps = GetSeg()->Npz();
248 Int_t fMaxNofSamples = GetSeg()->Npx();
42da2935 249 Int_t fNofAnodes = fNofMaps/2;
250 Int_t dummy=0;
aacedc3e 251 Double_t fTimeStep = GetSeg()->Dpx( dummy );
252 Double_t fSddLength = GetSeg()->Dx();
aacedc3e 253 Double_t anodePitch = GetSeg()->Dpz( dummy );
404c1c29 254 AliITSCalibrationSDD* cal = (AliITSCalibrationSDD*)GetResp(fModule);
aacedc3e 255 Map()->ClearMap();
f45f6658 256 Map()->SetThresholdArr( fCutAmplitude );
257 Map()->FillMap2();
fcf95fc7 258
42da2935 259 Int_t nClu = 0;
50d05d7b 260 // cout << "Search cluster... "<< endl;
42da2935 261 for( Int_t j=0; j<2; j++ ){
50d05d7b 262 for( Int_t k=0; k<fNofAnodes; k++ ){
263 Int_t idx = j*fNofAnodes+k;
f45f6658 264 Double_t baseline=GetResp(fModule)->GetBaseline(idx);
50d05d7b 265 Bool_t on = kFALSE;
266 Int_t start = 0;
267 Int_t nTsteps = 0;
aacedc3e 268 Double_t fmax = 0.;
50d05d7b 269 Int_t lmax = 0;
aacedc3e 270 Double_t charge = 0.;
271 Double_t time = 0.;
272 Double_t anode = k+0.5;
50d05d7b 273 Int_t peakpos = -1;
274 for( Int_t l=0; l<fMaxNofSamples; l++ ){
aacedc3e 275 Double_t fadc = (Double_t)Map()->GetSignal( idx, l );
50d05d7b 276 if( fadc > 0.0 ){
277 if( on == kFALSE && l<fMaxNofSamples-4){
278 // star RawCluster (reset var.)
aacedc3e 279 Double_t fadc1 = (Double_t)Map()->GetSignal( idx, l+1 );
50d05d7b 280 if( fadc1 < fadc ) continue;
281 start = l;
282 fmax = 0.;
283 lmax = 0;
284 time = 0.;
285 charge = 0.;
286 on = kTRUE;
287 nTsteps = 0;
288 } // end if on...
289 nTsteps++ ;
290 if( fadc > baseline ) fadc -= baseline;
291 else fadc=0.;
292 charge += fadc;
293 time += fadc*l;
294 if( fadc > fmax ){
295 fmax = fadc;
296 lmax = l;
297 Int_t shift = (Int_t)(fTimeCorr/fTimeStep + 0.5);
298 if( l > shift && l < (fMaxNofSamples-shift) )
aacedc3e 299 peakpos = Map()->GetHitIndex( idx, l+shift );
50d05d7b 300 else
aacedc3e 301 peakpos = Map()->GetHitIndex( idx, l );
302 if( peakpos < 0) peakpos = Map()->GetHitIndex(idx,l);
50d05d7b 303 } // end if fadc
304 }else{ // end fadc>0
305 if( on == kTRUE ){
306 if( nTsteps > 2 ){
307 // min # of timesteps for a RawCluster
308 // Found a RawCluster...
309 Int_t stop = l-1;
310 time /= (charge/fTimeStep); // ns
311 // time = lmax*fTimeStep; // ns
312 if( time > fTimeCorr ) time -= fTimeCorr; // ns
aacedc3e 313 Double_t anodePath =(anode-fNofAnodes/2)*anodePitch;
404c1c29 314
315 Double_t driftPath = (Double_t)cal->GetDriftPath(time,anodePath);
50d05d7b 316 driftPath = fSddLength-driftPath;
317 AliITSRawClusterSDD clust(j+1,anode,time,charge,
318 fmax, peakpos,0.,0.,
319 driftPath,anodePath,
320 nTsteps,start,stop,
321 start, stop, 1, k, k );
7d62fb64 322 fDetTypeRec->AddCluster( 1, &clust );
f77f13c8 323 if(AliDebugLevel()>=5) clust.PrintInfo();
50d05d7b 324 nClu++;
325 } // end if nTsteps
326 on = kFALSE;
327 } // end if on==kTRUE
328 } // end if fadc>0
329 } // samples
330 } // anodes
42da2935 331 } // wings
f77f13c8 332 AliDebug(3,Form("# Rawclusters %d",nClu));
42da2935 333 return;
a1f090e0 334}
42da2935 335//_______________________________________________________________________
aacedc3e 336Int_t AliITSClusterFinderSDD::SearchPeak(Double_t *spect,Int_t xdim,Int_t zdim,
50d05d7b 337 Int_t *peakX, Int_t *peakZ,
aacedc3e 338 Double_t *peakAmp, Double_t minpeak ){
42da2935 339 // search peaks on a 2D cluster
340 Int_t npeak = 0; // # peaks
56fff130 341 Int_t i,j;
42da2935 342 // search peaks
343 for( Int_t z=1; z<zdim-1; z++ ){
48058160 344 for( Int_t x=1; x<xdim-2; x++ ){
aacedc3e 345 Double_t sxz = spect[x*zdim+z];
346 Double_t sxz1 = spect[(x+1)*zdim+z];
347 Double_t sxz2 = spect[(x-1)*zdim+z];
50d05d7b 348 // search a local max. in s[x,z]
349 if( sxz < minpeak || sxz1 <= 0 || sxz2 <= 0 ) continue;
350 if( sxz >= spect[(x+1)*zdim+z ] && sxz >= spect[(x-1)*zdim+z ] &&
351 sxz >= spect[x*zdim +z+1] && sxz >= spect[x*zdim +z-1] &&
352 sxz >= spect[(x+1)*zdim+z+1] && sxz >= spect[(x+1)*zdim+z-1] &&
353 sxz >= spect[(x-1)*zdim+z+1] && sxz >= spect[(x-1)*zdim+z-1] ){
354 // peak found
355 peakX[npeak] = x;
356 peakZ[npeak] = z;
357 peakAmp[npeak] = sxz;
358 npeak++;
359 } // end if ....
360 } // end for x
42da2935 361 } // end for z
362 // search groups of peaks with same amplitude.
363 Int_t *flag = new Int_t[npeak];
364 for( i=0; i<npeak; i++ ) flag[i] = 0;
365 for( i=0; i<npeak; i++ ){
50d05d7b 366 for( j=0; j<npeak; j++ ){
367 if( i==j) continue;
368 if( flag[j] > 0 ) continue;
369 if( peakAmp[i] == peakAmp[j] &&
370 TMath::Abs(peakX[i]-peakX[j])<=1 &&
371 TMath::Abs(peakZ[i]-peakZ[j])<=1 ){
372 if( flag[i] == 0) flag[i] = i+1;
373 flag[j] = flag[i];
374 } // end if ...
375 } // end for j
42da2935 376 } // end for i
50d05d7b 377 // make average of peak groups
42da2935 378 for( i=0; i<npeak; i++ ){
50d05d7b 379 Int_t nFlag = 1;
380 if( flag[i] <= 0 ) continue;
381 for( j=0; j<npeak; j++ ){
382 if( i==j ) continue;
383 if( flag[j] != flag[i] ) continue;
384 peakX[i] += peakX[j];
385 peakZ[i] += peakZ[j];
386 nFlag++;
387 npeak--;
388 for( Int_t k=j; k<npeak; k++ ){
389 peakX[k] = peakX[k+1];
390 peakZ[k] = peakZ[k+1];
391 peakAmp[k] = peakAmp[k+1];
392 flag[k] = flag[k+1];
393 } // end for k
394 j--;
395 } // end for j
396 if( nFlag > 1 ){
397 peakX[i] /= nFlag;
398 peakZ[i] /= nFlag;
399 } // end fi nFlag
42da2935 400 } // end for i
401 delete [] flag;
402 return( npeak );
a1f090e0 403}
42da2935 404//______________________________________________________________________
aacedc3e 405void AliITSClusterFinderSDD::PeakFunc( Int_t xdim, Int_t zdim, Double_t *par,
406 Double_t *spe, Double_t *integral){
24a1c341 407 // function used to fit the clusters
50d05d7b 408 // par -> parameters..
24a1c341 409 // par[0] number of peaks.
410 // for each peak i=1, ..., par[0]
50d05d7b 411 // par[i] = Ampl.
412 // par[i+1] = xpos
413 // par[i+2] = zpos
414 // par[i+3] = tau
415 // par[i+4] = sigma.
fcf95fc7 416 Int_t electronics = GetResp(fModule)->GetElectronics(); // 1 = PASCAL, 2 = OLA
24a1c341 417 const Int_t knParam = 5;
418 Int_t npeak = (Int_t)par[0];
42da2935 419
aacedc3e 420 memset( spe, 0, sizeof( Double_t )*zdim*xdim );
42da2935 421
24a1c341 422 Int_t k = 1;
42da2935 423 for( Int_t i=0; i<npeak; i++ ){
24a1c341 424 if( integral != 0 ) integral[i] = 0.;
aacedc3e 425 Double_t sigmaA2 = par[k+4]*par[k+4]*2.;
426 Double_t t2 = par[k+3]; // PASCAL
bf3f2830 427 if( electronics == 2 ) { t2 *= t2; t2 *= 2; } // OLA
42da2935 428 for( Int_t z=0; z<zdim; z++ ){
429 for( Int_t x=0; x<xdim; x++ ){
aacedc3e 430 Double_t z2 = (z-par[k+2])*(z-par[k+2])/sigmaA2;
431 Double_t x2 = 0.;
432 Double_t signal = 0.;
42da2935 433 if( electronics == 1 ){ // PASCAL
bf3f2830 434 x2 = (x-par[k+1]+t2)/t2;
42da2935 435 signal = (x2>0.) ? par[k]*x2*exp(-x2+1.-z2) :0.0; // RCCR2
436 // signal =(x2>0.) ? par[k]*x2*x2*exp(-2*x2+2.-z2 ):0.0;//RCCR
437 }else if( electronics == 2 ) { // OLA
bf3f2830 438 x2 = (x-par[k+1])*(x-par[k+1])/t2;
50d05d7b 439 signal = par[k] * exp( -x2 - z2 );
440 } else {
aacedc3e 441 Warning("PeakFunc","Wrong SDD Electronics = %d",
442 electronics);
50d05d7b 443 // exit( 1 );
444 } // end if electronicx
24a1c341 445 spe[x*zdim+z] += signal;
446 if( integral != 0 ) integral[i] += signal;
42da2935 447 } // end for x
448 } // end for z
24a1c341 449 k += knParam;
42da2935 450 } // end for i
24a1c341 451 return;
a1f090e0 452}
42da2935 453//__________________________________________________________________________
aacedc3e 454Double_t AliITSClusterFinderSDD::ChiSqr( Int_t xdim, Int_t zdim, Double_t *spe,
455 Double_t *speFit ) const{
42da2935 456 // EVALUATES UNNORMALIZED CHI-SQUARED
aacedc3e 457 Double_t chi2 = 0.;
42da2935 458 for( Int_t z=0; z<zdim; z++ ){
50d05d7b 459 for( Int_t x=1; x<xdim-1; x++ ){
460 Int_t index = x*zdim+z;
aacedc3e 461 Double_t tmp = spe[index] - speFit[index];
50d05d7b 462 chi2 += tmp*tmp;
463 } // end for x
42da2935 464 } // end for z
465 return( chi2 );
a1f090e0 466}
42da2935 467//_______________________________________________________________________
aacedc3e 468void AliITSClusterFinderSDD::Minim( Int_t xdim, Int_t zdim, Double_t *param,
469 Double_t *prm0,Double_t *steprm,
470 Double_t *chisqr,Double_t *spe,
471 Double_t *speFit ){
42da2935 472 //
473 Int_t k, nnn, mmm, i;
aacedc3e 474 Double_t p1, delta, d1, chisq1, p2, chisq2, t, p3, chisq3, a, b, p0, chisqt;
42da2935 475 const Int_t knParam = 5;
476 Int_t npeak = (Int_t)param[0];
477 for( k=1; k<(npeak*knParam+1); k++ ) prm0[k] = param[k];
478 for( k=1; k<(npeak*knParam+1); k++ ){
50d05d7b 479 p1 = param[k];
480 delta = steprm[k];
481 d1 = delta;
482 // ENSURE THAT STEP SIZE IS SENSIBLY LARGER THAN MACHINE ROUND OFF
f4b7cee4 483 if( TMath::Abs( p1 ) > 1.0E-6 )
484 if ( TMath::Abs( delta/p1 ) < 1.0E-4 ) delta = p1/1000;
aacedc3e 485 else delta = (Double_t)1.0E-4;
50d05d7b 486 // EVALUATE CHI-SQUARED AT FIRST TWO SEARCH POINTS
487 PeakFunc( xdim, zdim, param, speFit );
488 chisq1 = ChiSqr( xdim, zdim, spe, speFit );
489 p2 = p1+delta;
490 param[k] = p2;
491 PeakFunc( xdim, zdim, param, speFit );
492 chisq2 = ChiSqr( xdim, zdim, spe, speFit );
493 if( chisq1 < chisq2 ){
494 // REVERSE DIRECTION OF SEARCH IF CHI-SQUARED IS INCREASING
495 delta = -delta;
496 t = p1;
497 p1 = p2;
498 p2 = t;
499 t = chisq1;
500 chisq1 = chisq2;
501 chisq2 = t;
502 } // end if
503 i = 1; nnn = 0;
504 do { // INCREMENT param(K) UNTIL CHI-SQUARED STARTS TO INCREASE
505 nnn++;
506 p3 = p2 + delta;
507 mmm = nnn - (nnn/5)*5; // multiplo de 5
508 if( mmm == 0 ){
509 d1 = delta;
510 // INCREASE STEP SIZE IF STEPPING TOWARDS MINIMUM IS TOO SLOW
511 delta *= 5;
512 } // end if
513 param[k] = p3;
514 // Constrain paramiters
515 Int_t kpos = (k-1) % knParam;
516 switch( kpos ){
517 case 0 :
518 if( param[k] <= 20 ) param[k] = fMinPeak;
519 break;
520 case 1 :
f4b7cee4 521 if( TMath::Abs( param[k] - prm0[k] ) > 1.5 ) param[k] = prm0[k];
50d05d7b 522 break;
523 case 2 :
f4b7cee4 524 if( TMath::Abs( param[k] - prm0[k] ) > 1. ) param[k] = prm0[k];
50d05d7b 525 break;
526 case 3 :
527 if( param[k] < .5 ) param[k] = .5;
528 break;
529 case 4 :
aacedc3e 530 if( param[k] < .288 ) param[k] = .288;// 1/sqrt(12) = 0.288
50d05d7b 531 if( param[k] > zdim*.5 ) param[k] = zdim*.5;
532 break;
533 }; // end switch
534 PeakFunc( xdim, zdim, param, speFit );
535 chisq3 = ChiSqr( xdim, zdim, spe, speFit );
536 if( chisq3 < chisq2 && nnn < 50 ){
537 p1 = p2;
538 p2 = p3;
539 chisq1 = chisq2;
540 chisq2 = chisq3;
541 }else i=0;
542 } while( i );
543 // FIND MINIMUM OF PARABOLA DEFINED BY LAST THREE POINTS
544 a = chisq1*(p2-p3)+chisq2*(p3-p1)+chisq3*(p1-p2);
545 b = chisq1*(p2*p2-p3*p3)+chisq2*(p3*p3-p1*p1)+chisq3*(p1*p1-p2*p2);
aacedc3e 546 if( a!=0 ) p0 = (Double_t)(0.5*b/a);
50d05d7b 547 else p0 = 10000;
548 //--IN CASE OF NEARLY EQUAL CHI-SQUARED AND TOO SMALL STEP SIZE PREVENT
549 // ERRONEOUS EVALUATION OF PARABOLA MINIMUM
550 //---NEXT TWO LINES CAN BE OMITTED FOR HIGHER PRECISION MACHINES
f4b7cee4 551 //dp = (Double_t) max (TMath::Abs(p3-p2), TMath::Abs(p2-p1));
552 //if( TMath::Abs( p2-p0 ) > dp ) p0 = p2;
50d05d7b 553 param[k] = p0;
554 // Constrain paramiters
555 Int_t kpos = (k-1) % knParam;
556 switch( kpos ){
557 case 0 :
558 if( param[k] <= 20 ) param[k] = fMinPeak;
559 break;
560 case 1 :
f4b7cee4 561 if( TMath::Abs( param[k] - prm0[k] ) > 1.5 ) param[k] = prm0[k];
50d05d7b 562 break;
563 case 2 :
f4b7cee4 564 if( TMath::Abs( param[k] - prm0[k] ) > 1. ) param[k] = prm0[k];
50d05d7b 565 break;
566 case 3 :
567 if( param[k] < .5 ) param[k] = .5;
568 break;
569 case 4 :
570 if( param[k] < .288 ) param[k] = .288; // 1/sqrt(12) = 0.288
571 if( param[k] > zdim*.5 ) param[k] = zdim*.5;
572 break;
573 }; // end switch
574 PeakFunc( xdim, zdim, param, speFit );
575 chisqt = ChiSqr( xdim, zdim, spe, speFit );
576 // DO NOT ALLOW ERRONEOUS INTERPOLATION
577 if( chisqt <= *chisqr ) *chisqr = chisqt;
578 else param[k] = prm0[k];
579 // OPTIMIZE SEARCH STEP FOR EVENTUAL NEXT CALL OF MINIM
580 steprm[k] = (param[k]-prm0[k])/5;
581 if( steprm[k] >= d1 ) steprm[k] = d1/5;
42da2935 582 } // end for k
583 // EVALUATE FIT AND CHI-SQUARED FOR OPTIMIZED PARAMETERS
584 PeakFunc( xdim, zdim, param, speFit );
585 *chisqr = ChiSqr( xdim, zdim, spe, speFit );
586 return;
a1f090e0 587}
42da2935 588//_________________________________________________________________________
589Int_t AliITSClusterFinderSDD::NoLinearFit( Int_t xdim, Int_t zdim,
aacedc3e 590 Double_t *param, Double_t *spe,
591 Int_t *niter, Double_t *chir ){
42da2935 592 // fit method from Comput. Phys. Commun 46(1987) 149
aacedc3e 593 const Double_t kchilmt = 0.01; // relative accuracy
50d05d7b 594 const Int_t knel = 3; // for parabolic minimization
595 const Int_t knstop = 50; // Max. iteration number
42da2935 596 const Int_t knParam = 5;
597 Int_t npeak = (Int_t)param[0];
598 // RETURN IF NUMBER OF DEGREES OF FREEDOM IS NOT POSITIVE
599 if( (xdim*zdim - npeak*knParam) <= 0 ) return( -1 );
aacedc3e 600 Double_t degFree = (xdim*zdim - npeak*knParam)-1;
42da2935 601 Int_t n, k, iterNum = 0;
aacedc3e 602 Double_t *prm0 = new Double_t[npeak*knParam+1];
603 Double_t *step = new Double_t[npeak*knParam+1];
604 Double_t *schi = new Double_t[npeak*knParam+1];
605 Double_t *sprm[3];
606 sprm[0] = new Double_t[npeak*knParam+1];
607 sprm[1] = new Double_t[npeak*knParam+1];
608 sprm[2] = new Double_t[npeak*knParam+1];
609 Double_t chi0, chi1, reldif, a, b, prmin, dp;
610 Double_t *speFit = new Double_t[ xdim*zdim ];
42da2935 611 PeakFunc( xdim, zdim, param, speFit );
612 chi0 = ChiSqr( xdim, zdim, spe, speFit );
613 chi1 = chi0;
614 for( k=1; k<(npeak*knParam+1); k++) prm0[k] = param[k];
50d05d7b 615 for( k=1 ; k<(npeak*knParam+1); k+=knParam ){
616 step[k] = param[k] / 20.0 ;
617 step[k+1] = param[k+1] / 50.0;
618 step[k+2] = param[k+2] / 50.0;
619 step[k+3] = param[k+3] / 20.0;
620 step[k+4] = param[k+4] / 20.0;
621 } // end for k
42da2935 622 Int_t out = 0;
623 do{
50d05d7b 624 iterNum++;
625 chi0 = chi1;
626 Minim( xdim, zdim, param, prm0, step, &chi1, spe, speFit );
f4b7cee4 627 reldif = ( chi1 > 0 ) ? ((Double_t) TMath::Abs( chi1-chi0)/chi1 ) : 0;
50d05d7b 628 // EXIT conditions
629 if( reldif < (float) kchilmt ){
630 *chir = (chi1>0) ? (float) TMath::Sqrt (chi1/degFree) :0;
631 *niter = iterNum;
632 out = 0;
633 break;
634 } // end if
635 if( (reldif < (float)(5*kchilmt)) && (iterNum > knstop) ){
636 *chir = (chi1>0) ?(float) TMath::Sqrt (chi1/degFree):0;
637 *niter = iterNum;
638 out = 0;
639 break;
640 } // end if
641 if( iterNum > 5*knstop ){
642 *chir = (chi1>0) ?(float) TMath::Sqrt (chi1/degFree):0;
643 *niter = iterNum;
644 out = 1;
645 break;
646 } // end if
647 if( iterNum <= knel ) continue;
648 n = iterNum - (iterNum/knel)*knel; // EXTRAPOLATION LIMIT COUNTER N
649 if( n > 3 || n == 0 ) continue;
650 schi[n-1] = chi1;
651 for( k=1; k<(npeak*knParam+1); k++ ) sprm[n-1][k] = param[k];
652 if( n != 3 ) continue;
653 // -EVALUATE EXTRAPOLATED VALUE OF EACH PARAMETER BY FINDING MINIMUM OF
654 // PARABOLA DEFINED BY LAST THREE CALLS OF MINIM
655 for( k=1; k<(npeak*knParam+1); k++ ){
aacedc3e 656 Double_t tmp0 = sprm[0][k];
657 Double_t tmp1 = sprm[1][k];
658 Double_t tmp2 = sprm[2][k];
50d05d7b 659 a = schi[0]*(tmp1-tmp2) + schi[1]*(tmp2-tmp0);
660 a += (schi[2]*(tmp0-tmp1));
661 b = schi[0]*(tmp1*tmp1-tmp2*tmp2);
662 b += (schi[1]*(tmp2*tmp2-tmp0*tmp0)+(schi[2]*
663 (tmp0*tmp0-tmp1*tmp1)));
664 if ((double)a < 1.0E-6) prmin = 0;
665 else prmin = (float) (0.5*b/a);
666 dp = 5*(tmp2-tmp0);
f4b7cee4 667 if( TMath::Abs(prmin-tmp2) > TMath::Abs(dp) ) prmin = tmp2+dp;
50d05d7b 668 param[k] = prmin;
669 step[k] = dp/10; // OPTIMIZE SEARCH STEP
670 } // end for k
42da2935 671 } while( kTRUE );
672 delete [] prm0;
673 delete [] step;
674 delete [] schi;
675 delete [] sprm[0];
676 delete [] sprm[1];
677 delete [] sprm[2];
678 delete [] speFit;
679 return( out );
a1f090e0 680}
50d05d7b 681
42da2935 682//______________________________________________________________________
04366a57 683void AliITSClusterFinderSDD::ResolveClusters(){
42da2935 684 // The function to resolve clusters if the clusters overlapping exists
24a1c341 685 Int_t i;
42da2935 686 // get number of clusters for this module
aacedc3e 687 Int_t nofClusters = NClusters();
42da2935 688 nofClusters -= fNclusters;
aacedc3e 689 Int_t fNofMaps = GetSeg()->Npz();
42da2935 690 Int_t fNofAnodes = fNofMaps/2;
aacedc3e 691 //Int_t fMaxNofSamples = GetSeg()->Npx();
42da2935 692 Int_t dummy=0;
aacedc3e 693 Double_t fTimeStep = GetSeg()->Dpx( dummy );
694 Double_t fSddLength = GetSeg()->Dx();
aacedc3e 695 Double_t anodePitch = GetSeg()->Dpz( dummy );
f45f6658 696 //Double_t n, baseline;
697 //GetResp(fModule)->GetNoiseParam( n, baseline );
fcf95fc7 698 Int_t electronics =GetResp(fModule)->GetElectronics(); // 1 = PASCAL, 2 = OLA
404c1c29 699 AliITSCalibrationSDD* cal = (AliITSCalibrationSDD*)GetResp(fModule);
700
50d05d7b 701
42da2935 702 for( Int_t j=0; j<nofClusters; j++ ){
50d05d7b 703 // get cluster information
aacedc3e 704 AliITSRawClusterSDD *clusterJ=(AliITSRawClusterSDD*) Cluster(j);
50d05d7b 705 Int_t astart = clusterJ->Astart();
706 Int_t astop = clusterJ->Astop();
707 Int_t tstart = clusterJ->Tstartf();
708 Int_t tstop = clusterJ->Tstopf();
709 Int_t wing = (Int_t)clusterJ->W();
710 if( wing == 2 ){
711 astart += fNofAnodes;
712 astop += fNofAnodes;
713 } // end if
714 Int_t xdim = tstop-tstart+3;
715 Int_t zdim = astop-astart+3;
d86f531c 716 if( xdim > 50 || zdim > 30 ) {
04366a57 717 Warning("ResolveClusters","xdim: %d , zdim: %d ",xdim,zdim);
d86f531c 718 continue;
719 }
aacedc3e 720 Double_t *sp = new Double_t[ xdim*zdim+1 ];
721 memset( sp, 0, sizeof(Double_t)*(xdim*zdim+1) );
50d05d7b 722
723 // make a local map from cluster region
724 for( Int_t ianode=astart; ianode<=astop; ianode++ ){
725 for( Int_t itime=tstart; itime<=tstop; itime++ ){
aacedc3e 726 Double_t fadc = Map()->GetSignal( ianode, itime );
f45f6658 727 Double_t baseline=GetResp(fModule)->GetBaseline(ianode);
50d05d7b 728 if( fadc > baseline ) fadc -= (Double_t)baseline;
729 else fadc = 0.;
730 Int_t index = (itime-tstart+1)*zdim+(ianode-astart+1);
731 sp[index] = fadc;
732 } // time loop
733 } // anode loop
734
735 // search peaks on cluster
736 const Int_t kNp = 150;
737 Int_t peakX1[kNp];
738 Int_t peakZ1[kNp];
aacedc3e 739 Double_t peakAmp1[kNp];
50d05d7b 740 Int_t npeak = SearchPeak(sp,xdim,zdim,peakX1,peakZ1,peakAmp1,fMinPeak);
741
742 // if multiple peaks, split cluster
aacedc3e 743 if( npeak >= 1 ){
50d05d7b 744 // cout << "npeak " << npeak << endl;
745 // clusterJ->PrintInfo();
aacedc3e 746 Double_t *par = new Double_t[npeak*5+1];
747 par[0] = (Double_t)npeak;
48058160 748 // Initial parameters in cell dimentions
50d05d7b 749 Int_t k1 = 1;
750 for( i=0; i<npeak; i++ ){
751 par[k1] = peakAmp1[i];
752 par[k1+1] = peakX1[i]; // local time pos. [timebin]
753 par[k1+2] = peakZ1[i]; // local anode pos. [anodepitch]
aacedc3e 754 if( electronics == 1 ) par[k1+3] = 2.; // PASCAL
755 else if(electronics==2) par[k1+3] = 0.7;//tau [timebin] OLA
50d05d7b 756 par[k1+4] = .4; // sigma [anodepich]
aacedc3e 757 k1 += 5;
50d05d7b 758 } // end for i
759 Int_t niter;
aacedc3e 760 Double_t chir;
50d05d7b 761 NoLinearFit( xdim, zdim, par, sp, &niter, &chir );
aacedc3e 762 Double_t peakX[kNp];
763 Double_t peakZ[kNp];
764 Double_t sigma[kNp];
765 Double_t tau[kNp];
766 Double_t peakAmp[kNp];
767 Double_t integral[kNp];
50d05d7b 768 //get integrals => charge for each peak
769 PeakFunc( xdim, zdim, par, sp, integral );
770 k1 = 1;
771 for( i=0; i<npeak; i++ ){
772 peakAmp[i] = par[k1];
d86f531c 773 peakX[i] = par[k1+1];
774 peakZ[i] = par[k1+2];
775 tau[i] = par[k1+3];
776 sigma[i] = par[k1+4];
50d05d7b 777 k1+=5;
778 } // end for i
779 // calculate parameter for new clusters
780 for( i=0; i<npeak; i++ ){
781 AliITSRawClusterSDD clusterI( *clusterJ );
d86f531c 782
50d05d7b 783 Int_t newAnode = peakZ1[i]-1 + astart;
d86f531c 784
785 // Int_t newiTime = peakX1[i]-1 + tstart;
786 // Int_t shift = (Int_t)(fTimeCorr/fTimeStep + 0.5);
787 // if( newiTime > shift && newiTime < (fMaxNofSamples-shift) )
788 // shift = 0;
aacedc3e 789 // Int_t peakpos = Map()->GetHitIndex(newAnode,newiTime+shift );
d86f531c 790 // clusterI.SetPeakPos( peakpos );
791
50d05d7b 792 clusterI.SetPeakAmpl( peakAmp1[i] );
aacedc3e 793 Double_t newAnodef = peakZ[i] - 0.5 + astart;
794 Double_t newiTimef = peakX[i] - 1 + tstart;
50d05d7b 795 if( wing == 2 ) newAnodef -= fNofAnodes;
aacedc3e 796 Double_t anodePath = (newAnodef - fNofAnodes/2)*anodePitch;
50d05d7b 797 newiTimef *= fTimeStep;
798 if( newiTimef > fTimeCorr ) newiTimef -= fTimeCorr;
799 if( electronics == 1 ){
48058160 800 // newiTimef *= 0.999438; // PASCAL
801 // newiTimef += (6./fDriftSpeed - newiTimef/3000.);
50d05d7b 802 }else if( electronics == 2 )
803 newiTimef *= 0.99714; // OLA
d86f531c 804
805 Int_t timeBin = (Int_t)(newiTimef/fTimeStep+0.5);
aacedc3e 806 Int_t peakpos = Map()->GetHitIndex( newAnode, timeBin );
d86f531c 807 if( peakpos < 0 ) {
808 for( Int_t ii=0; ii<3; ii++ ) {
aacedc3e 809 peakpos = Map()->GetHitIndex( newAnode, timeBin+ii );
d86f531c 810 if( peakpos > 0 ) break;
aacedc3e 811 peakpos = Map()->GetHitIndex( newAnode, timeBin-ii );
d86f531c 812 if( peakpos > 0 ) break;
813 }
814 }
815
816 if( peakpos < 0 ) {
04366a57 817 //Warning("ResolveClusters",
aacedc3e 818 // "Digit not found for cluster");
f77f13c8 819 //if(AliDebugLevel()>=3) clusterI.PrintInfo();
d86f531c 820 continue;
821 }
404c1c29 822 clusterI.SetPeakPos( peakpos );
823 Float_t dp = cal->GetDriftPath(newiTimef,anodePath);
824 Double_t driftPath = fSddLength - (Double_t)dp;
aacedc3e 825 Double_t sign = ( wing == 1 ) ? -1. : 1.;
404c1c29 826 Double_t xcoord = driftPath*sign * 0.0001;
827 Double_t zcoord = anodePath * 0.0001;
828 CorrectPosition(zcoord,xcoord);
829 clusterI.SetX( xcoord );
830 clusterI.SetZ( zcoord );
50d05d7b 831 clusterI.SetAnode( newAnodef );
832 clusterI.SetTime( newiTimef );
833 clusterI.SetAsigma( sigma[i]*anodePitch );
834 clusterI.SetTsigma( tau[i]*fTimeStep );
835 clusterI.SetQ( integral[i] );
d86f531c 836
7d62fb64 837 fDetTypeRec->AddCluster( 1, &clusterI );
50d05d7b 838 } // end for i
aacedc3e 839 Clusters()->RemoveAt( j );
50d05d7b 840 delete [] par;
48058160 841 } else { // something odd
04366a57 842 Warning( "ResolveClusters",
aacedc3e 843 "--- Peak not found!!!! minpeak=%d ,cluster peak= %f"
844 " , module= %d",
845 fMinPeak, clusterJ->PeakAmpl(),GetModule());
d86f531c 846 clusterJ->PrintInfo();
04366a57 847 Warning( "ResolveClusters"," xdim= %d zdim= %d", xdim-2, zdim-2 );
50d05d7b 848 }
849 delete [] sp;
42da2935 850 } // cluster loop
aacedc3e 851 Clusters()->Compress();
852// Map()->ClearMap();
a1f090e0 853}
42da2935 854//________________________________________________________________________
855void AliITSClusterFinderSDD::GroupClusters(){
856 // group clusters
857 Int_t dummy=0;
aacedc3e 858 Double_t fTimeStep = GetSeg()->Dpx(dummy);
42da2935 859 // get number of clusters for this module
aacedc3e 860 Int_t nofClusters = NClusters();
42da2935 861 nofClusters -= fNclusters;
862 AliITSRawClusterSDD *clusterI;
863 AliITSRawClusterSDD *clusterJ;
864 Int_t *label = new Int_t [nofClusters];
865 Int_t i,j;
866 for(i=0; i<nofClusters; i++) label[i] = 0;
867 for(i=0; i<nofClusters; i++) {
50d05d7b 868 if(label[i] != 0) continue;
869 for(j=i+1; j<nofClusters; j++) {
870 if(label[j] != 0) continue;
aacedc3e 871 clusterI = (AliITSRawClusterSDD*) Cluster(i);
872 clusterJ = (AliITSRawClusterSDD*) Cluster(j);
50d05d7b 873 // 1.3 good
874 if(clusterI->T() < fTimeStep*60) fDAnode = 4.2; // TB 3.2
875 if(clusterI->T() < fTimeStep*10) fDAnode = 1.5; // TB 1.
876 Bool_t pair = clusterI->Brother(clusterJ,fDAnode,fDTime);
877 if(!pair) continue;
f77f13c8 878 if(AliDebugLevel()>=4){
aacedc3e 879 clusterI->PrintInfo();
880 clusterJ->PrintInfo();
f77f13c8 881 } // end if AliDebugLevel
50d05d7b 882 clusterI->Add(clusterJ);
883 label[j] = 1;
aacedc3e 884 Clusters()->RemoveAt(j);
50d05d7b 885 j=i; // <- Ernesto
886 } // J clusters
887 label[i] = 1;
42da2935 888 } // I clusters
aacedc3e 889 Clusters()->Compress();
42da2935 890
891 delete [] label;
892 return;
b0f5e3fc 893}
42da2935 894//________________________________________________________________________
895void AliITSClusterFinderSDD::SelectClusters(){
896 // get number of clusters for this module
aacedc3e 897 Int_t nofClusters = NClusters();
b0f5e3fc 898
42da2935 899 nofClusters -= fNclusters;
900 Int_t i;
901 for(i=0; i<nofClusters; i++) {
aacedc3e 902 AliITSRawClusterSDD *clusterI =(AliITSRawClusterSDD*) Cluster(i);
50d05d7b 903 Int_t rmflg = 0;
aacedc3e 904 Double_t wy = 0.;
50d05d7b 905 if(clusterI->Anodes() != 0.) {
aacedc3e 906 wy = ((Double_t) clusterI->Samples())/clusterI->Anodes();
50d05d7b 907 } // end if
908 Int_t amp = (Int_t) clusterI->PeakAmpl();
909 Int_t cha = (Int_t) clusterI->Q();
910 if(amp < fMinPeak) rmflg = 1;
911 if(cha < fMinCharge) rmflg = 1;
912 if(wy < fMinNCells) rmflg = 1;
913 //if(wy > fMaxNCells) rmflg = 1;
aacedc3e 914 if(rmflg) Clusters()->RemoveAt(i);
42da2935 915 } // I clusters
aacedc3e 916 Clusters()->Compress();
42da2935 917 return;
b0f5e3fc 918}
42da2935 919
42da2935 920//______________________________________________________________________
921void AliITSClusterFinderSDD::GetRecPoints(){
922 // get rec points
04366a57 923
42da2935 924 // get number of clusters for this module
aacedc3e 925 Int_t nofClusters = NClusters();
42da2935 926 nofClusters -= fNclusters;
aacedc3e 927 const Double_t kconvGeV = 1.e-6; // GeV -> KeV
928 const Double_t kconv = 1.0e-4;
929 const Double_t kRMSx = 38.0*kconv; // microns->cm ITS TDR Table 1.3
930 const Double_t kRMSz = 28.0*kconv; // microns->cm ITS TDR Table 1.3
d86f531c 931 Int_t i;
42da2935 932 Int_t ix, iz, idx=-1;
933 AliITSdigitSDD *dig=0;
aacedc3e 934 Int_t ndigits=NDigits();
00a7cc50 935
936 Int_t lay,lad,det;
937 fDetTypeRec->GetITSgeom()->GetModuleId(fModule,lay,lad,det);
938 Int_t ind=(lad-1)*fDetTypeRec->GetITSgeom()->GetNdetectors(lay)+(det-1);
939 Int_t lyr=(lay-1);
940
941
42da2935 942 for(i=0; i<nofClusters; i++) {
aacedc3e 943 AliITSRawClusterSDD *clusterI = (AliITSRawClusterSDD*)Cluster(i);
50d05d7b 944 if(!clusterI) Error("SDD: GetRecPoints","i clusterI ",i,clusterI);
945 if(clusterI) idx=clusterI->PeakPos();
946 if(idx>ndigits) Error("SDD: GetRecPoints","idx ndigits",idx,ndigits);
947 // try peak neighbours - to be done
aacedc3e 948 if(idx&&idx<= ndigits) dig =(AliITSdigitSDD*)GetDigit(idx);
d86f531c 949 if(!dig) {
50d05d7b 950 // try cog
aacedc3e 951 GetSeg()->GetPadIxz(clusterI->X(),clusterI->Z(),ix,iz);
952 dig = (AliITSdigitSDD*)Map()->GetHit(iz-1,ix-1);
50d05d7b 953 // if null try neighbours
aacedc3e 954 if (!dig) dig = (AliITSdigitSDD*)Map()->GetHit(iz-1,ix);
955 if (!dig) dig = (AliITSdigitSDD*)Map()->GetHit(iz-1,ix+1);
50d05d7b 956 if (!dig) printf("SDD: cannot assign the track number!\n");
957 } // end if !dig
75fb37cc 958
959 Int_t lab[4] = {-3141593,-3141593,-3141593,ind};
960 if (dig) {
961 lab[0] = dig->GetTrack(0);
962 lab[1] = dig->GetTrack(1);
963 lab[2] = dig->GetTrack(2);
964 }
965 Float_t hit[5] = {clusterI->X(),clusterI->Z(),kRMSx*kRMSx,kRMSz*kRMSz,clusterI->Q()};
966 Int_t info[3] = {0,0,lyr};
967
968 AliITSRecPoint rnew(lab,hit,info,kTRUE);
50d05d7b 969 rnew.SetdEdX(kconvGeV*clusterI->Q());
d86f531c 970
7d62fb64 971 fDetTypeRec->AddRecPoint(rnew);
42da2935 972 } // I clusters
aacedc3e 973// Map()->ClearMap();
b0f5e3fc 974}
42da2935 975//______________________________________________________________________
976void AliITSClusterFinderSDD::FindRawClusters(Int_t mod){
977 // find raw clusters
50d05d7b 978
aacedc3e 979 SetModule(mod);
f45f6658 980 SetCutAmplitude(mod);
981 Int_t nanodes=GetSeg()->Npz();
982 Int_t noise=0;
983 for(Int_t i=0;i<nanodes;i++){
984 noise+=(Int_t)(((AliITSCalibrationSDD*)GetResp(mod))->GetNoiseAfterElectronics(i));
985 }
986 SetMinPeak((noise/nanodes)*5);
a1f090e0 987 Find1DClustersE();
b0f5e3fc 988 GroupClusters();
989 SelectClusters();
04366a57 990 ResolveClusters();
b0f5e3fc 991 GetRecPoints();
992}
42da2935 993//_______________________________________________________________________
d2f55a22 994void AliITSClusterFinderSDD::PrintStatus() const{
42da2935 995 // Print SDD cluster finder Parameters
996
997 cout << "**************************************************" << endl;
998 cout << " Silicon Drift Detector Cluster Finder Parameters " << endl;
999 cout << "**************************************************" << endl;
1000 cout << "Number of Clusters: " << fNclusters << endl;
1001 cout << "Anode Tolerance: " << fDAnode << endl;
1002 cout << "Time Tolerance: " << fDTime << endl;
1003 cout << "Time correction (electronics): " << fTimeCorr << endl;
f45f6658 1004 cout << "Cut Amplitude (threshold): " << fCutAmplitude[0] << endl;
42da2935 1005 cout << "Minimum Amplitude: " << fMinPeak << endl;
1006 cout << "Minimum Charge: " << fMinCharge << endl;
1007 cout << "Minimum number of cells/clusters: " << fMinNCells << endl;
1008 cout << "Maximum number of cells/clusters: " << fMaxNCells << endl;
1009 cout << "**************************************************" << endl;
a1f090e0 1010}
404c1c29 1011
1012//_________________________________________________________________________
1013void AliITSClusterFinderSDD::CorrectPosition(Double_t &z, Double_t&y){
1014 //correction of coordinates using the maps stored in the DB
1015
1016 AliITSCalibrationSDD* cal = (AliITSCalibrationSDD*)GetResp(fModule);
1017 static const Int_t nbint = cal->GetMapTimeNBin();
1018 static const Int_t nbina = cal->Chips()*cal->Channels();
1019 Float_t stepa = (GetSeg()->Dpz(0))/10000.; //anode pitch in cm
1020 Float_t stept = (GetSeg()->Dx()/cal->GetMapTimeNBin()/2.)/10.;
1021
1022 Int_t bint = TMath::Abs((Int_t)(y/stept));
1023 if(y>=0) bint+=(Int_t)(nbint/2.);
1024 if(bint>nbint) AliError("Wrong bin number!");
1025
1026 Int_t bina = TMath::Abs((Int_t)(z/stepa));
1027 if(z>=0) bina+=(Int_t)(nbina/2.);
1028 if(bina>nbina) AliError("Wrong bin number!");
1029
1030 Double_t devz = (Double_t)cal->GetMapACell(bina,bint)/10000.;
1031 Double_t devx = (Double_t)cal->GetMapTCell(bina,bint)/10000.;
1032 z+=devz;
1033 y+=devx;
1034
1035}