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- Compute parameter covariances including absorber dispersion effects
[u/mrichter/AliRoot.git] / ITS / AliITSClusterFinderSDD.cxx
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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"
6cae184e 33#include "AliITSgeom.h"
f77f13c8 34#include "AliLog.h"
b0f5e3fc 35
b0f5e3fc 36ClassImp(AliITSClusterFinderSDD)
37
aacedc3e 38//______________________________________________________________________
39AliITSClusterFinderSDD::AliITSClusterFinderSDD():
40AliITSClusterFinder(),
41fNclusters(0),
42fDAnode(0.0),
43fDTime(0.0),
44fTimeCorr(0.0),
45fCutAmplitude(0),
46fMinPeak(0),
47fMinCharge(0),
48fMinNCells(0),
49fMaxNCells(0){
50 // default constructor
51}
42da2935 52//______________________________________________________________________
8ba39da9 53AliITSClusterFinderSDD::AliITSClusterFinderSDD(AliITSDetTypeRec* dettyp,
50d05d7b 54 TClonesArray *digits,
aacedc3e 55 TClonesArray *recp):
8ba39da9 56AliITSClusterFinder(dettyp),
aacedc3e 57fNclusters(0),
58fDAnode(0.0),
59fDTime(0.0),
60fTimeCorr(0.0),
61fCutAmplitude(0),
62fMinPeak(0),
63fMinCharge(0),
64fMinNCells(0),
65fMaxNCells(0){
42da2935 66 // standard constructor
78a228db 67
aacedc3e 68 SetDigits(digits);
69 SetClusters(recp);
8ba39da9 70 SetCutAmplitude(fDetTypeRec->GetITSgeom()->GetStartSDD());
b0f5e3fc 71 SetDAnode();
72 SetDTime();
f45f6658 73 SetMinPeak((Int_t)((AliITSCalibrationSDD*)GetResp(fDetTypeRec->GetITSgeom()->GetStartSDD()))->GetNoiseAfterElectronics(0)*5);
78a228db 74 SetMinNCells();
75 SetMaxNCells();
76 SetTimeCorr();
a1f090e0 77 SetMinCharge();
aacedc3e 78 SetMap(new AliITSMapA1(GetSeg(),Digits(),fCutAmplitude));
e8189707 79}
42da2935 80//______________________________________________________________________
8ba39da9 81void AliITSClusterFinderSDD::SetCutAmplitude(Int_t mod,Double_t nsigma){
42da2935 82 // set the signal threshold for cluster finder
f45f6658 83 Double_t baseline,noiseAfterEl;
42da2935 84
0599a018 85 AliITSresponseSDD* res = (AliITSresponseSDD*)((AliITSCalibrationSDD*)GetResp(mod))->GetResponse();
86 const char *option=res->ZeroSuppOption();
f45f6658 87 Int_t nanodes = GetResp(mod)->Wings()*GetResp(mod)->Channels()*GetResp(mod)->Chips();
88 fCutAmplitude.Set(nanodes);
89 for(Int_t ian=0;ian<nanodes;ian++){
f45f6658 90 noiseAfterEl = ((AliITSCalibrationSDD*)GetResp(mod))->GetNoiseAfterElectronics(ian);
0599a018 91 if((strstr(option,"1D")) || (strstr(option,"2D"))){
92 fCutAmplitude[ian] = (Int_t)(nsigma*noiseAfterEl);
93 }
94 else{
95 baseline=GetResp(mod)->GetBaseline(ian);
96 fCutAmplitude[ian] = (Int_t)((baseline + nsigma*noiseAfterEl));
97 }
f45f6658 98 }
5dd4cc39 99}
42da2935 100//______________________________________________________________________
101void AliITSClusterFinderSDD::Find1DClusters(){
102 // find 1D clusters
a1f090e0 103
42da2935 104 // retrieve the parameters
aacedc3e 105 Int_t fNofMaps = GetSeg()->Npz();
106 Int_t fMaxNofSamples = GetSeg()->Npx();
b48af428 107 Int_t fNofAnodes = fNofMaps/2;
108 Int_t dummy = 0;
aacedc3e 109 Double_t fTimeStep = GetSeg()->Dpx(dummy);
110 Double_t fSddLength = GetSeg()->Dx();
aacedc3e 111 Double_t anodePitch = GetSeg()->Dpz(dummy);
404c1c29 112 AliITSCalibrationSDD* cal = (AliITSCalibrationSDD*)GetResp(fModule);
0599a018 113 AliITSresponseSDD* res = (AliITSresponseSDD*)((AliITSCalibrationSDD*)GetResp(fModule))->GetResponse();
114 const char *option=res->ZeroSuppOption();
115
42da2935 116 // map the signal
aacedc3e 117 Map()->ClearMap();
f45f6658 118 Map()->SetThresholdArr(fCutAmplitude);
119 Map()->FillMap2();
a1f090e0 120
42da2935 121 Int_t nofFoundClusters = 0;
122 Int_t i;
aacedc3e 123 Double_t **dfadc = new Double_t*[fNofAnodes];
124 for(i=0;i<fNofAnodes;i++) dfadc[i] = new Double_t[fMaxNofSamples];
125 Double_t fadc = 0.;
126 Double_t fadc1 = 0.;
127 Double_t fadc2 = 0.;
42da2935 128 Int_t j,k,idx,l,m;
129 for(j=0;j<2;j++) {
50d05d7b 130 for(k=0;k<fNofAnodes;k++) {
131 idx = j*fNofAnodes+k;
132 // signal (fadc) & derivative (dfadc)
133 dfadc[k][255]=0.;
134 for(l=0; l<fMaxNofSamples; l++) {
aacedc3e 135 fadc2=(Double_t)Map()->GetSignal(idx,l);
136 if(l>0) fadc1=(Double_t)Map()->GetSignal(idx,l-1);
50d05d7b 137 if(l>0) dfadc[k][l-1] = fadc2-fadc1;
138 } // samples
139 } // anodes
42da2935 140
50d05d7b 141 for(k=0;k<fNofAnodes;k++) {
f77f13c8 142 AliDebug(5,Form("Anode: %d, Wing: %d",k+1,j+1));
50d05d7b 143 idx = j*fNofAnodes+k;
144 Int_t imax = 0;
145 Int_t imaxd = 0;
146 Int_t it = 0;
147 while(it <= fMaxNofSamples-3) {
148 imax = it;
149 imaxd = it;
150 // maximum of signal
aacedc3e 151 Double_t fadcmax = 0.;
152 Double_t dfadcmax = 0.;
50d05d7b 153 Int_t lthrmina = 1;
154 Int_t lthrmint = 3;
155 Int_t lthra = 1;
156 Int_t lthrt = 0;
157 for(m=0;m<20;m++) {
158 Int_t id = it+m;
159 if(id>=fMaxNofSamples) break;
aacedc3e 160 fadc=(float)Map()->GetSignal(idx,id);
50d05d7b 161 if(fadc > fadcmax) { fadcmax = fadc; imax = id;}
f45f6658 162 if(fadc > (float)fCutAmplitude[idx])lthrt++;
50d05d7b 163 if(dfadc[k][id] > dfadcmax) {
164 dfadcmax = dfadc[k][id];
165 imaxd = id;
166 } // end if
167 } // end for m
168 it = imaxd;
aacedc3e 169 if(Map()->TestHit(idx,imax) == kEmpty) {it++; continue;}
50d05d7b 170 // cluster charge
171 Int_t tstart = it-2;
172 if(tstart < 0) tstart = 0;
173 Bool_t ilcl = 0;
174 if(lthrt >= lthrmint && lthra >= lthrmina) ilcl = 1;
175 if(ilcl) {
176 nofFoundClusters++;
177 Int_t tstop = tstart;
aacedc3e 178 Double_t dfadcmin = 10000.;
50d05d7b 179 Int_t ij;
180 for(ij=0; ij<20; ij++) {
181 if(tstart+ij > 255) { tstop = 255; break; }
aacedc3e 182 fadc=(float)Map()->GetSignal(idx,tstart+ij);
50d05d7b 183 if((dfadc[k][tstart+ij] < dfadcmin) &&
f45f6658 184 (fadc > fCutAmplitude[idx])) {
50d05d7b 185 tstop = tstart+ij+5;
186 if(tstop > 255) tstop = 255;
187 dfadcmin = dfadc[k][it+ij];
188 } // end if
189 } // end for ij
42da2935 190
aacedc3e 191 Double_t clusterCharge = 0.;
192 Double_t clusterAnode = k+0.5;
193 Double_t clusterTime = 0.;
50d05d7b 194 Int_t clusterMult = 0;
aacedc3e 195 Double_t clusterPeakAmplitude = 0.;
50d05d7b 196 Int_t its,peakpos = -1;
0599a018 197
f45f6658 198 for(its=tstart; its<=tstop; its++) {
aacedc3e 199 fadc=(float)Map()->GetSignal(idx,its);
0599a018 200 if(!((strstr(option,"1D")) || (strstr(option,"2D")))){
201 Double_t baseline=GetResp(fModule)->GetBaseline(idx);
202 if(fadc>baseline) fadc -= baseline;
203 else fadc = 0.;
204 }
50d05d7b 205 clusterCharge += fadc;
206 // as a matter of fact we should take the peak
207 // pos before FFT
208 // to get the list of tracks !!!
209 if(fadc > clusterPeakAmplitude) {
210 clusterPeakAmplitude = fadc;
aacedc3e 211 //peakpos=Map()->GetHitIndex(idx,its);
50d05d7b 212 Int_t shift = (int)(fTimeCorr/fTimeStep);
213 if(its>shift && its<(fMaxNofSamples-shift))
aacedc3e 214 peakpos = Map()->GetHitIndex(idx,its+shift);
215 else peakpos = Map()->GetHitIndex(idx,its);
216 if(peakpos<0) peakpos =Map()->GetHitIndex(idx,its);
50d05d7b 217 } // end if
218 clusterTime += fadc*its;
219 if(fadc > 0) clusterMult++;
220 if(its == tstop) {
221 clusterTime /= (clusterCharge/fTimeStep); // ns
222 if(clusterTime>fTimeCorr) clusterTime -=fTimeCorr;
223 //ns
224 } // end if
225 } // end for its
42da2935 226
aacedc3e 227 Double_t clusteranodePath = (clusterAnode - fNofAnodes/2)*
228 anodePitch;
404c1c29 229 Double_t clusterDriftPath = (Double_t)cal->GetDriftPath(clusterTime,clusteranodePath);
50d05d7b 230 clusterDriftPath = fSddLength-clusterDriftPath;
231 if(clusterCharge <= 0.) break;
232 AliITSRawClusterSDD clust(j+1,//i
233 clusterAnode,clusterTime,//ff
234 clusterCharge, //f
235 clusterPeakAmplitude, //f
236 peakpos, //i
237 0.,0.,clusterDriftPath,//fff
238 clusteranodePath, //f
239 clusterMult, //i
240 0,0,0,0,0,0,0);//7*i
7d62fb64 241 fDetTypeRec->AddCluster(1,&clust);
50d05d7b 242 it = tstop;
243 } // ilcl
244 it++;
245 } // while (samples)
246 } // anodes
42da2935 247 } // detectors (2)
42da2935 248
249 for(i=0;i<fNofAnodes;i++) delete[] dfadc[i];
250 delete [] dfadc;
a1f090e0 251
42da2935 252 return;
a1f090e0 253}
42da2935 254//______________________________________________________________________
255void AliITSClusterFinderSDD::Find1DClustersE(){
24a1c341 256 // find 1D clusters
42da2935 257 // retrieve the parameters
aacedc3e 258 Int_t fNofMaps = GetSeg()->Npz();
259 Int_t fMaxNofSamples = GetSeg()->Npx();
42da2935 260 Int_t fNofAnodes = fNofMaps/2;
261 Int_t dummy=0;
aacedc3e 262 Double_t fTimeStep = GetSeg()->Dpx( dummy );
263 Double_t fSddLength = GetSeg()->Dx();
aacedc3e 264 Double_t anodePitch = GetSeg()->Dpz( dummy );
404c1c29 265 AliITSCalibrationSDD* cal = (AliITSCalibrationSDD*)GetResp(fModule);
aacedc3e 266 Map()->ClearMap();
f45f6658 267 Map()->SetThresholdArr( fCutAmplitude );
268 Map()->FillMap2();
fcf95fc7 269
0599a018 270 AliITSresponseSDD* res = (AliITSresponseSDD*)cal->GetResponse();
271 const char *option=res->ZeroSuppOption();
272
42da2935 273 Int_t nClu = 0;
50d05d7b 274 // cout << "Search cluster... "<< endl;
42da2935 275 for( Int_t j=0; j<2; j++ ){
50d05d7b 276 for( Int_t k=0; k<fNofAnodes; k++ ){
0599a018 277 Int_t idx = j*fNofAnodes+k;
50d05d7b 278 Bool_t on = kFALSE;
279 Int_t start = 0;
280 Int_t nTsteps = 0;
aacedc3e 281 Double_t fmax = 0.;
50d05d7b 282 Int_t lmax = 0;
aacedc3e 283 Double_t charge = 0.;
284 Double_t time = 0.;
285 Double_t anode = k+0.5;
50d05d7b 286 Int_t peakpos = -1;
287 for( Int_t l=0; l<fMaxNofSamples; l++ ){
aacedc3e 288 Double_t fadc = (Double_t)Map()->GetSignal( idx, l );
50d05d7b 289 if( fadc > 0.0 ){
290 if( on == kFALSE && l<fMaxNofSamples-4){
291 // star RawCluster (reset var.)
aacedc3e 292 Double_t fadc1 = (Double_t)Map()->GetSignal( idx, l+1 );
50d05d7b 293 if( fadc1 < fadc ) continue;
294 start = l;
295 fmax = 0.;
296 lmax = 0;
297 time = 0.;
298 charge = 0.;
299 on = kTRUE;
300 nTsteps = 0;
301 } // end if on...
302 nTsteps++ ;
0599a018 303 if(!((strstr(option,"1D")) || (strstr(option,"2D")))){
304 Double_t baseline=GetResp(fModule)->GetBaseline(idx);
305 if( fadc > baseline ) fadc -= baseline;
306 else fadc=0.;
307 }
50d05d7b 308 charge += fadc;
309 time += fadc*l;
310 if( fadc > fmax ){
311 fmax = fadc;
312 lmax = l;
313 Int_t shift = (Int_t)(fTimeCorr/fTimeStep + 0.5);
314 if( l > shift && l < (fMaxNofSamples-shift) )
aacedc3e 315 peakpos = Map()->GetHitIndex( idx, l+shift );
50d05d7b 316 else
aacedc3e 317 peakpos = Map()->GetHitIndex( idx, l );
318 if( peakpos < 0) peakpos = Map()->GetHitIndex(idx,l);
50d05d7b 319 } // end if fadc
320 }else{ // end fadc>0
321 if( on == kTRUE ){
322 if( nTsteps > 2 ){
323 // min # of timesteps for a RawCluster
324 // Found a RawCluster...
325 Int_t stop = l-1;
326 time /= (charge/fTimeStep); // ns
327 // time = lmax*fTimeStep; // ns
328 if( time > fTimeCorr ) time -= fTimeCorr; // ns
aacedc3e 329 Double_t anodePath =(anode-fNofAnodes/2)*anodePitch;
404c1c29 330
4952f440 331 Double_t driftPath = (Double_t)cal->GetDriftPath(time,anode);
50d05d7b 332 driftPath = fSddLength-driftPath;
333 AliITSRawClusterSDD clust(j+1,anode,time,charge,
334 fmax, peakpos,0.,0.,
335 driftPath,anodePath,
336 nTsteps,start,stop,
337 start, stop, 1, k, k );
7d62fb64 338 fDetTypeRec->AddCluster( 1, &clust );
f77f13c8 339 if(AliDebugLevel()>=5) clust.PrintInfo();
50d05d7b 340 nClu++;
341 } // end if nTsteps
342 on = kFALSE;
343 } // end if on==kTRUE
344 } // end if fadc>0
345 } // samples
346 } // anodes
42da2935 347 } // wings
f77f13c8 348 AliDebug(3,Form("# Rawclusters %d",nClu));
42da2935 349 return;
a1f090e0 350}
42da2935 351//_______________________________________________________________________
aacedc3e 352Int_t AliITSClusterFinderSDD::SearchPeak(Double_t *spect,Int_t xdim,Int_t zdim,
50d05d7b 353 Int_t *peakX, Int_t *peakZ,
aacedc3e 354 Double_t *peakAmp, Double_t minpeak ){
42da2935 355 // search peaks on a 2D cluster
356 Int_t npeak = 0; // # peaks
56fff130 357 Int_t i,j;
42da2935 358 // search peaks
359 for( Int_t z=1; z<zdim-1; z++ ){
48058160 360 for( Int_t x=1; x<xdim-2; x++ ){
aacedc3e 361 Double_t sxz = spect[x*zdim+z];
362 Double_t sxz1 = spect[(x+1)*zdim+z];
363 Double_t sxz2 = spect[(x-1)*zdim+z];
50d05d7b 364 // search a local max. in s[x,z]
365 if( sxz < minpeak || sxz1 <= 0 || sxz2 <= 0 ) continue;
366 if( sxz >= spect[(x+1)*zdim+z ] && sxz >= spect[(x-1)*zdim+z ] &&
367 sxz >= spect[x*zdim +z+1] && sxz >= spect[x*zdim +z-1] &&
368 sxz >= spect[(x+1)*zdim+z+1] && sxz >= spect[(x+1)*zdim+z-1] &&
369 sxz >= spect[(x-1)*zdim+z+1] && sxz >= spect[(x-1)*zdim+z-1] ){
370 // peak found
371 peakX[npeak] = x;
372 peakZ[npeak] = z;
373 peakAmp[npeak] = sxz;
374 npeak++;
375 } // end if ....
376 } // end for x
42da2935 377 } // end for z
378 // search groups of peaks with same amplitude.
379 Int_t *flag = new Int_t[npeak];
380 for( i=0; i<npeak; i++ ) flag[i] = 0;
381 for( i=0; i<npeak; i++ ){
50d05d7b 382 for( j=0; j<npeak; j++ ){
383 if( i==j) continue;
384 if( flag[j] > 0 ) continue;
385 if( peakAmp[i] == peakAmp[j] &&
386 TMath::Abs(peakX[i]-peakX[j])<=1 &&
387 TMath::Abs(peakZ[i]-peakZ[j])<=1 ){
388 if( flag[i] == 0) flag[i] = i+1;
389 flag[j] = flag[i];
390 } // end if ...
391 } // end for j
42da2935 392 } // end for i
50d05d7b 393 // make average of peak groups
42da2935 394 for( i=0; i<npeak; i++ ){
50d05d7b 395 Int_t nFlag = 1;
396 if( flag[i] <= 0 ) continue;
397 for( j=0; j<npeak; j++ ){
398 if( i==j ) continue;
399 if( flag[j] != flag[i] ) continue;
400 peakX[i] += peakX[j];
401 peakZ[i] += peakZ[j];
402 nFlag++;
403 npeak--;
404 for( Int_t k=j; k<npeak; k++ ){
405 peakX[k] = peakX[k+1];
406 peakZ[k] = peakZ[k+1];
407 peakAmp[k] = peakAmp[k+1];
408 flag[k] = flag[k+1];
409 } // end for k
410 j--;
411 } // end for j
412 if( nFlag > 1 ){
413 peakX[i] /= nFlag;
414 peakZ[i] /= nFlag;
415 } // end fi nFlag
42da2935 416 } // end for i
417 delete [] flag;
418 return( npeak );
a1f090e0 419}
42da2935 420//______________________________________________________________________
aacedc3e 421void AliITSClusterFinderSDD::PeakFunc( Int_t xdim, Int_t zdim, Double_t *par,
422 Double_t *spe, Double_t *integral){
24a1c341 423 // function used to fit the clusters
50d05d7b 424 // par -> parameters..
24a1c341 425 // par[0] number of peaks.
426 // for each peak i=1, ..., par[0]
50d05d7b 427 // par[i] = Ampl.
428 // par[i+1] = xpos
429 // par[i+2] = zpos
430 // par[i+3] = tau
431 // par[i+4] = sigma.
fcf95fc7 432 Int_t electronics = GetResp(fModule)->GetElectronics(); // 1 = PASCAL, 2 = OLA
24a1c341 433 const Int_t knParam = 5;
434 Int_t npeak = (Int_t)par[0];
42da2935 435
aacedc3e 436 memset( spe, 0, sizeof( Double_t )*zdim*xdim );
42da2935 437
24a1c341 438 Int_t k = 1;
42da2935 439 for( Int_t i=0; i<npeak; i++ ){
24a1c341 440 if( integral != 0 ) integral[i] = 0.;
aacedc3e 441 Double_t sigmaA2 = par[k+4]*par[k+4]*2.;
442 Double_t t2 = par[k+3]; // PASCAL
bf3f2830 443 if( electronics == 2 ) { t2 *= t2; t2 *= 2; } // OLA
42da2935 444 for( Int_t z=0; z<zdim; z++ ){
445 for( Int_t x=0; x<xdim; x++ ){
aacedc3e 446 Double_t z2 = (z-par[k+2])*(z-par[k+2])/sigmaA2;
447 Double_t x2 = 0.;
448 Double_t signal = 0.;
42da2935 449 if( electronics == 1 ){ // PASCAL
bf3f2830 450 x2 = (x-par[k+1]+t2)/t2;
42da2935 451 signal = (x2>0.) ? par[k]*x2*exp(-x2+1.-z2) :0.0; // RCCR2
452 // signal =(x2>0.) ? par[k]*x2*x2*exp(-2*x2+2.-z2 ):0.0;//RCCR
453 }else if( electronics == 2 ) { // OLA
bf3f2830 454 x2 = (x-par[k+1])*(x-par[k+1])/t2;
50d05d7b 455 signal = par[k] * exp( -x2 - z2 );
456 } else {
aacedc3e 457 Warning("PeakFunc","Wrong SDD Electronics = %d",
458 electronics);
50d05d7b 459 // exit( 1 );
460 } // end if electronicx
24a1c341 461 spe[x*zdim+z] += signal;
462 if( integral != 0 ) integral[i] += signal;
42da2935 463 } // end for x
464 } // end for z
24a1c341 465 k += knParam;
42da2935 466 } // end for i
24a1c341 467 return;
a1f090e0 468}
42da2935 469//__________________________________________________________________________
aacedc3e 470Double_t AliITSClusterFinderSDD::ChiSqr( Int_t xdim, Int_t zdim, Double_t *spe,
471 Double_t *speFit ) const{
42da2935 472 // EVALUATES UNNORMALIZED CHI-SQUARED
aacedc3e 473 Double_t chi2 = 0.;
42da2935 474 for( Int_t z=0; z<zdim; z++ ){
50d05d7b 475 for( Int_t x=1; x<xdim-1; x++ ){
476 Int_t index = x*zdim+z;
aacedc3e 477 Double_t tmp = spe[index] - speFit[index];
50d05d7b 478 chi2 += tmp*tmp;
479 } // end for x
42da2935 480 } // end for z
481 return( chi2 );
a1f090e0 482}
42da2935 483//_______________________________________________________________________
aacedc3e 484void AliITSClusterFinderSDD::Minim( Int_t xdim, Int_t zdim, Double_t *param,
485 Double_t *prm0,Double_t *steprm,
486 Double_t *chisqr,Double_t *spe,
487 Double_t *speFit ){
42da2935 488 //
489 Int_t k, nnn, mmm, i;
aacedc3e 490 Double_t p1, delta, d1, chisq1, p2, chisq2, t, p3, chisq3, a, b, p0, chisqt;
42da2935 491 const Int_t knParam = 5;
492 Int_t npeak = (Int_t)param[0];
493 for( k=1; k<(npeak*knParam+1); k++ ) prm0[k] = param[k];
494 for( k=1; k<(npeak*knParam+1); k++ ){
50d05d7b 495 p1 = param[k];
496 delta = steprm[k];
497 d1 = delta;
498 // ENSURE THAT STEP SIZE IS SENSIBLY LARGER THAN MACHINE ROUND OFF
f4b7cee4 499 if( TMath::Abs( p1 ) > 1.0E-6 )
500 if ( TMath::Abs( delta/p1 ) < 1.0E-4 ) delta = p1/1000;
aacedc3e 501 else delta = (Double_t)1.0E-4;
50d05d7b 502 // EVALUATE CHI-SQUARED AT FIRST TWO SEARCH POINTS
503 PeakFunc( xdim, zdim, param, speFit );
504 chisq1 = ChiSqr( xdim, zdim, spe, speFit );
505 p2 = p1+delta;
506 param[k] = p2;
507 PeakFunc( xdim, zdim, param, speFit );
508 chisq2 = ChiSqr( xdim, zdim, spe, speFit );
509 if( chisq1 < chisq2 ){
510 // REVERSE DIRECTION OF SEARCH IF CHI-SQUARED IS INCREASING
511 delta = -delta;
512 t = p1;
513 p1 = p2;
514 p2 = t;
515 t = chisq1;
516 chisq1 = chisq2;
517 chisq2 = t;
518 } // end if
519 i = 1; nnn = 0;
520 do { // INCREMENT param(K) UNTIL CHI-SQUARED STARTS TO INCREASE
521 nnn++;
522 p3 = p2 + delta;
523 mmm = nnn - (nnn/5)*5; // multiplo de 5
524 if( mmm == 0 ){
525 d1 = delta;
526 // INCREASE STEP SIZE IF STEPPING TOWARDS MINIMUM IS TOO SLOW
527 delta *= 5;
528 } // end if
529 param[k] = p3;
530 // Constrain paramiters
531 Int_t kpos = (k-1) % knParam;
532 switch( kpos ){
533 case 0 :
534 if( param[k] <= 20 ) param[k] = fMinPeak;
535 break;
536 case 1 :
f4b7cee4 537 if( TMath::Abs( param[k] - prm0[k] ) > 1.5 ) param[k] = prm0[k];
50d05d7b 538 break;
539 case 2 :
f4b7cee4 540 if( TMath::Abs( param[k] - prm0[k] ) > 1. ) param[k] = prm0[k];
50d05d7b 541 break;
542 case 3 :
543 if( param[k] < .5 ) param[k] = .5;
544 break;
545 case 4 :
aacedc3e 546 if( param[k] < .288 ) param[k] = .288;// 1/sqrt(12) = 0.288
50d05d7b 547 if( param[k] > zdim*.5 ) param[k] = zdim*.5;
548 break;
549 }; // end switch
550 PeakFunc( xdim, zdim, param, speFit );
551 chisq3 = ChiSqr( xdim, zdim, spe, speFit );
552 if( chisq3 < chisq2 && nnn < 50 ){
553 p1 = p2;
554 p2 = p3;
555 chisq1 = chisq2;
556 chisq2 = chisq3;
557 }else i=0;
558 } while( i );
559 // FIND MINIMUM OF PARABOLA DEFINED BY LAST THREE POINTS
560 a = chisq1*(p2-p3)+chisq2*(p3-p1)+chisq3*(p1-p2);
561 b = chisq1*(p2*p2-p3*p3)+chisq2*(p3*p3-p1*p1)+chisq3*(p1*p1-p2*p2);
aacedc3e 562 if( a!=0 ) p0 = (Double_t)(0.5*b/a);
50d05d7b 563 else p0 = 10000;
564 //--IN CASE OF NEARLY EQUAL CHI-SQUARED AND TOO SMALL STEP SIZE PREVENT
565 // ERRONEOUS EVALUATION OF PARABOLA MINIMUM
566 //---NEXT TWO LINES CAN BE OMITTED FOR HIGHER PRECISION MACHINES
f4b7cee4 567 //dp = (Double_t) max (TMath::Abs(p3-p2), TMath::Abs(p2-p1));
568 //if( TMath::Abs( p2-p0 ) > dp ) p0 = p2;
50d05d7b 569 param[k] = p0;
570 // Constrain paramiters
571 Int_t kpos = (k-1) % knParam;
572 switch( kpos ){
573 case 0 :
574 if( param[k] <= 20 ) param[k] = fMinPeak;
575 break;
576 case 1 :
f4b7cee4 577 if( TMath::Abs( param[k] - prm0[k] ) > 1.5 ) param[k] = prm0[k];
50d05d7b 578 break;
579 case 2 :
f4b7cee4 580 if( TMath::Abs( param[k] - prm0[k] ) > 1. ) param[k] = prm0[k];
50d05d7b 581 break;
582 case 3 :
583 if( param[k] < .5 ) param[k] = .5;
584 break;
585 case 4 :
586 if( param[k] < .288 ) param[k] = .288; // 1/sqrt(12) = 0.288
587 if( param[k] > zdim*.5 ) param[k] = zdim*.5;
588 break;
589 }; // end switch
590 PeakFunc( xdim, zdim, param, speFit );
591 chisqt = ChiSqr( xdim, zdim, spe, speFit );
592 // DO NOT ALLOW ERRONEOUS INTERPOLATION
593 if( chisqt <= *chisqr ) *chisqr = chisqt;
594 else param[k] = prm0[k];
595 // OPTIMIZE SEARCH STEP FOR EVENTUAL NEXT CALL OF MINIM
596 steprm[k] = (param[k]-prm0[k])/5;
597 if( steprm[k] >= d1 ) steprm[k] = d1/5;
42da2935 598 } // end for k
599 // EVALUATE FIT AND CHI-SQUARED FOR OPTIMIZED PARAMETERS
600 PeakFunc( xdim, zdim, param, speFit );
601 *chisqr = ChiSqr( xdim, zdim, spe, speFit );
602 return;
a1f090e0 603}
42da2935 604//_________________________________________________________________________
605Int_t AliITSClusterFinderSDD::NoLinearFit( Int_t xdim, Int_t zdim,
aacedc3e 606 Double_t *param, Double_t *spe,
607 Int_t *niter, Double_t *chir ){
42da2935 608 // fit method from Comput. Phys. Commun 46(1987) 149
aacedc3e 609 const Double_t kchilmt = 0.01; // relative accuracy
50d05d7b 610 const Int_t knel = 3; // for parabolic minimization
611 const Int_t knstop = 50; // Max. iteration number
42da2935 612 const Int_t knParam = 5;
613 Int_t npeak = (Int_t)param[0];
614 // RETURN IF NUMBER OF DEGREES OF FREEDOM IS NOT POSITIVE
615 if( (xdim*zdim - npeak*knParam) <= 0 ) return( -1 );
aacedc3e 616 Double_t degFree = (xdim*zdim - npeak*knParam)-1;
42da2935 617 Int_t n, k, iterNum = 0;
aacedc3e 618 Double_t *prm0 = new Double_t[npeak*knParam+1];
619 Double_t *step = new Double_t[npeak*knParam+1];
620 Double_t *schi = new Double_t[npeak*knParam+1];
621 Double_t *sprm[3];
622 sprm[0] = new Double_t[npeak*knParam+1];
623 sprm[1] = new Double_t[npeak*knParam+1];
624 sprm[2] = new Double_t[npeak*knParam+1];
625 Double_t chi0, chi1, reldif, a, b, prmin, dp;
626 Double_t *speFit = new Double_t[ xdim*zdim ];
42da2935 627 PeakFunc( xdim, zdim, param, speFit );
628 chi0 = ChiSqr( xdim, zdim, spe, speFit );
629 chi1 = chi0;
630 for( k=1; k<(npeak*knParam+1); k++) prm0[k] = param[k];
50d05d7b 631 for( k=1 ; k<(npeak*knParam+1); k+=knParam ){
632 step[k] = param[k] / 20.0 ;
633 step[k+1] = param[k+1] / 50.0;
634 step[k+2] = param[k+2] / 50.0;
635 step[k+3] = param[k+3] / 20.0;
636 step[k+4] = param[k+4] / 20.0;
637 } // end for k
42da2935 638 Int_t out = 0;
639 do{
50d05d7b 640 iterNum++;
641 chi0 = chi1;
642 Minim( xdim, zdim, param, prm0, step, &chi1, spe, speFit );
f4b7cee4 643 reldif = ( chi1 > 0 ) ? ((Double_t) TMath::Abs( chi1-chi0)/chi1 ) : 0;
50d05d7b 644 // EXIT conditions
645 if( reldif < (float) kchilmt ){
646 *chir = (chi1>0) ? (float) TMath::Sqrt (chi1/degFree) :0;
647 *niter = iterNum;
648 out = 0;
649 break;
650 } // end if
651 if( (reldif < (float)(5*kchilmt)) && (iterNum > knstop) ){
652 *chir = (chi1>0) ?(float) TMath::Sqrt (chi1/degFree):0;
653 *niter = iterNum;
654 out = 0;
655 break;
656 } // end if
657 if( iterNum > 5*knstop ){
658 *chir = (chi1>0) ?(float) TMath::Sqrt (chi1/degFree):0;
659 *niter = iterNum;
660 out = 1;
661 break;
662 } // end if
663 if( iterNum <= knel ) continue;
664 n = iterNum - (iterNum/knel)*knel; // EXTRAPOLATION LIMIT COUNTER N
665 if( n > 3 || n == 0 ) continue;
666 schi[n-1] = chi1;
667 for( k=1; k<(npeak*knParam+1); k++ ) sprm[n-1][k] = param[k];
668 if( n != 3 ) continue;
669 // -EVALUATE EXTRAPOLATED VALUE OF EACH PARAMETER BY FINDING MINIMUM OF
670 // PARABOLA DEFINED BY LAST THREE CALLS OF MINIM
671 for( k=1; k<(npeak*knParam+1); k++ ){
aacedc3e 672 Double_t tmp0 = sprm[0][k];
673 Double_t tmp1 = sprm[1][k];
674 Double_t tmp2 = sprm[2][k];
50d05d7b 675 a = schi[0]*(tmp1-tmp2) + schi[1]*(tmp2-tmp0);
676 a += (schi[2]*(tmp0-tmp1));
677 b = schi[0]*(tmp1*tmp1-tmp2*tmp2);
678 b += (schi[1]*(tmp2*tmp2-tmp0*tmp0)+(schi[2]*
679 (tmp0*tmp0-tmp1*tmp1)));
680 if ((double)a < 1.0E-6) prmin = 0;
681 else prmin = (float) (0.5*b/a);
682 dp = 5*(tmp2-tmp0);
f4b7cee4 683 if( TMath::Abs(prmin-tmp2) > TMath::Abs(dp) ) prmin = tmp2+dp;
50d05d7b 684 param[k] = prmin;
685 step[k] = dp/10; // OPTIMIZE SEARCH STEP
686 } // end for k
42da2935 687 } while( kTRUE );
688 delete [] prm0;
689 delete [] step;
690 delete [] schi;
691 delete [] sprm[0];
692 delete [] sprm[1];
693 delete [] sprm[2];
694 delete [] speFit;
695 return( out );
a1f090e0 696}
50d05d7b 697
42da2935 698//______________________________________________________________________
04366a57 699void AliITSClusterFinderSDD::ResolveClusters(){
42da2935 700 // The function to resolve clusters if the clusters overlapping exists
24a1c341 701 Int_t i;
42da2935 702 // get number of clusters for this module
aacedc3e 703 Int_t nofClusters = NClusters();
42da2935 704 nofClusters -= fNclusters;
aacedc3e 705 Int_t fNofMaps = GetSeg()->Npz();
42da2935 706 Int_t fNofAnodes = fNofMaps/2;
aacedc3e 707 //Int_t fMaxNofSamples = GetSeg()->Npx();
42da2935 708 Int_t dummy=0;
aacedc3e 709 Double_t fTimeStep = GetSeg()->Dpx( dummy );
710 Double_t fSddLength = GetSeg()->Dx();
aacedc3e 711 Double_t anodePitch = GetSeg()->Dpz( dummy );
fcf95fc7 712 Int_t electronics =GetResp(fModule)->GetElectronics(); // 1 = PASCAL, 2 = OLA
404c1c29 713 AliITSCalibrationSDD* cal = (AliITSCalibrationSDD*)GetResp(fModule);
0599a018 714 AliITSresponseSDD* res = (AliITSresponseSDD*)cal->GetResponse();
715 const char *option=res->ZeroSuppOption();
404c1c29 716
50d05d7b 717
42da2935 718 for( Int_t j=0; j<nofClusters; j++ ){
50d05d7b 719 // get cluster information
aacedc3e 720 AliITSRawClusterSDD *clusterJ=(AliITSRawClusterSDD*) Cluster(j);
50d05d7b 721 Int_t astart = clusterJ->Astart();
722 Int_t astop = clusterJ->Astop();
723 Int_t tstart = clusterJ->Tstartf();
724 Int_t tstop = clusterJ->Tstopf();
725 Int_t wing = (Int_t)clusterJ->W();
726 if( wing == 2 ){
727 astart += fNofAnodes;
728 astop += fNofAnodes;
729 } // end if
730 Int_t xdim = tstop-tstart+3;
731 Int_t zdim = astop-astart+3;
d86f531c 732 if( xdim > 50 || zdim > 30 ) {
04366a57 733 Warning("ResolveClusters","xdim: %d , zdim: %d ",xdim,zdim);
d86f531c 734 continue;
735 }
aacedc3e 736 Double_t *sp = new Double_t[ xdim*zdim+1 ];
737 memset( sp, 0, sizeof(Double_t)*(xdim*zdim+1) );
50d05d7b 738
739 // make a local map from cluster region
740 for( Int_t ianode=astart; ianode<=astop; ianode++ ){
741 for( Int_t itime=tstart; itime<=tstop; itime++ ){
0599a018 742 Double_t fadc = Map()->GetSignal( ianode, itime );
743 if(!((strstr(option,"1D")) || (strstr(option,"2D")))){
744 Double_t baseline=GetResp(fModule)->GetBaseline(ianode);
745 if( fadc > baseline ) fadc -= (Double_t)baseline;
746 else fadc = 0.;
747 }
50d05d7b 748 Int_t index = (itime-tstart+1)*zdim+(ianode-astart+1);
749 sp[index] = fadc;
750 } // time loop
751 } // anode loop
752
753 // search peaks on cluster
754 const Int_t kNp = 150;
755 Int_t peakX1[kNp];
756 Int_t peakZ1[kNp];
aacedc3e 757 Double_t peakAmp1[kNp];
50d05d7b 758 Int_t npeak = SearchPeak(sp,xdim,zdim,peakX1,peakZ1,peakAmp1,fMinPeak);
759
760 // if multiple peaks, split cluster
aacedc3e 761 if( npeak >= 1 ){
50d05d7b 762 // cout << "npeak " << npeak << endl;
763 // clusterJ->PrintInfo();
aacedc3e 764 Double_t *par = new Double_t[npeak*5+1];
765 par[0] = (Double_t)npeak;
48058160 766 // Initial parameters in cell dimentions
50d05d7b 767 Int_t k1 = 1;
768 for( i=0; i<npeak; i++ ){
769 par[k1] = peakAmp1[i];
770 par[k1+1] = peakX1[i]; // local time pos. [timebin]
771 par[k1+2] = peakZ1[i]; // local anode pos. [anodepitch]
aacedc3e 772 if( electronics == 1 ) par[k1+3] = 2.; // PASCAL
773 else if(electronics==2) par[k1+3] = 0.7;//tau [timebin] OLA
50d05d7b 774 par[k1+4] = .4; // sigma [anodepich]
aacedc3e 775 k1 += 5;
50d05d7b 776 } // end for i
777 Int_t niter;
aacedc3e 778 Double_t chir;
50d05d7b 779 NoLinearFit( xdim, zdim, par, sp, &niter, &chir );
aacedc3e 780 Double_t peakX[kNp];
781 Double_t peakZ[kNp];
782 Double_t sigma[kNp];
783 Double_t tau[kNp];
784 Double_t peakAmp[kNp];
785 Double_t integral[kNp];
50d05d7b 786 //get integrals => charge for each peak
787 PeakFunc( xdim, zdim, par, sp, integral );
788 k1 = 1;
789 for( i=0; i<npeak; i++ ){
790 peakAmp[i] = par[k1];
d86f531c 791 peakX[i] = par[k1+1];
792 peakZ[i] = par[k1+2];
793 tau[i] = par[k1+3];
794 sigma[i] = par[k1+4];
50d05d7b 795 k1+=5;
796 } // end for i
797 // calculate parameter for new clusters
798 for( i=0; i<npeak; i++ ){
799 AliITSRawClusterSDD clusterI( *clusterJ );
d86f531c 800
50d05d7b 801 Int_t newAnode = peakZ1[i]-1 + astart;
d86f531c 802
803 // Int_t newiTime = peakX1[i]-1 + tstart;
804 // Int_t shift = (Int_t)(fTimeCorr/fTimeStep + 0.5);
805 // if( newiTime > shift && newiTime < (fMaxNofSamples-shift) )
806 // shift = 0;
aacedc3e 807 // Int_t peakpos = Map()->GetHitIndex(newAnode,newiTime+shift );
d86f531c 808 // clusterI.SetPeakPos( peakpos );
809
50d05d7b 810 clusterI.SetPeakAmpl( peakAmp1[i] );
aacedc3e 811 Double_t newAnodef = peakZ[i] - 0.5 + astart;
812 Double_t newiTimef = peakX[i] - 1 + tstart;
50d05d7b 813 if( wing == 2 ) newAnodef -= fNofAnodes;
aacedc3e 814 Double_t anodePath = (newAnodef - fNofAnodes/2)*anodePitch;
50d05d7b 815 newiTimef *= fTimeStep;
816 if( newiTimef > fTimeCorr ) newiTimef -= fTimeCorr;
817 if( electronics == 1 ){
48058160 818 // newiTimef *= 0.999438; // PASCAL
819 // newiTimef += (6./fDriftSpeed - newiTimef/3000.);
50d05d7b 820 }else if( electronics == 2 )
821 newiTimef *= 0.99714; // OLA
d86f531c 822
823 Int_t timeBin = (Int_t)(newiTimef/fTimeStep+0.5);
aacedc3e 824 Int_t peakpos = Map()->GetHitIndex( newAnode, timeBin );
d86f531c 825 if( peakpos < 0 ) {
826 for( Int_t ii=0; ii<3; ii++ ) {
aacedc3e 827 peakpos = Map()->GetHitIndex( newAnode, timeBin+ii );
d86f531c 828 if( peakpos > 0 ) break;
aacedc3e 829 peakpos = Map()->GetHitIndex( newAnode, timeBin-ii );
d86f531c 830 if( peakpos > 0 ) break;
831 }
832 }
833
834 if( peakpos < 0 ) {
04366a57 835 //Warning("ResolveClusters",
aacedc3e 836 // "Digit not found for cluster");
f77f13c8 837 //if(AliDebugLevel()>=3) clusterI.PrintInfo();
d86f531c 838 continue;
839 }
404c1c29 840 clusterI.SetPeakPos( peakpos );
4952f440 841 Float_t dp = cal->GetDriftPath(newiTimef,newAnodef);
404c1c29 842 Double_t driftPath = fSddLength - (Double_t)dp;
aacedc3e 843 Double_t sign = ( wing == 1 ) ? -1. : 1.;
404c1c29 844 Double_t xcoord = driftPath*sign * 0.0001;
845 Double_t zcoord = anodePath * 0.0001;
846 CorrectPosition(zcoord,xcoord);
847 clusterI.SetX( xcoord );
848 clusterI.SetZ( zcoord );
50d05d7b 849 clusterI.SetAnode( newAnodef );
850 clusterI.SetTime( newiTimef );
851 clusterI.SetAsigma( sigma[i]*anodePitch );
852 clusterI.SetTsigma( tau[i]*fTimeStep );
853 clusterI.SetQ( integral[i] );
d86f531c 854
7d62fb64 855 fDetTypeRec->AddCluster( 1, &clusterI );
50d05d7b 856 } // end for i
aacedc3e 857 Clusters()->RemoveAt( j );
50d05d7b 858 delete [] par;
48058160 859 } else { // something odd
04366a57 860 Warning( "ResolveClusters",
aacedc3e 861 "--- Peak not found!!!! minpeak=%d ,cluster peak= %f"
862 " , module= %d",
863 fMinPeak, clusterJ->PeakAmpl(),GetModule());
d86f531c 864 clusterJ->PrintInfo();
04366a57 865 Warning( "ResolveClusters"," xdim= %d zdim= %d", xdim-2, zdim-2 );
50d05d7b 866 }
867 delete [] sp;
42da2935 868 } // cluster loop
aacedc3e 869 Clusters()->Compress();
870// Map()->ClearMap();
a1f090e0 871}
42da2935 872//________________________________________________________________________
873void AliITSClusterFinderSDD::GroupClusters(){
874 // group clusters
875 Int_t dummy=0;
aacedc3e 876 Double_t fTimeStep = GetSeg()->Dpx(dummy);
42da2935 877 // get number of clusters for this module
aacedc3e 878 Int_t nofClusters = NClusters();
42da2935 879 nofClusters -= fNclusters;
880 AliITSRawClusterSDD *clusterI;
881 AliITSRawClusterSDD *clusterJ;
882 Int_t *label = new Int_t [nofClusters];
883 Int_t i,j;
884 for(i=0; i<nofClusters; i++) label[i] = 0;
885 for(i=0; i<nofClusters; i++) {
50d05d7b 886 if(label[i] != 0) continue;
887 for(j=i+1; j<nofClusters; j++) {
888 if(label[j] != 0) continue;
aacedc3e 889 clusterI = (AliITSRawClusterSDD*) Cluster(i);
890 clusterJ = (AliITSRawClusterSDD*) Cluster(j);
50d05d7b 891 // 1.3 good
892 if(clusterI->T() < fTimeStep*60) fDAnode = 4.2; // TB 3.2
893 if(clusterI->T() < fTimeStep*10) fDAnode = 1.5; // TB 1.
894 Bool_t pair = clusterI->Brother(clusterJ,fDAnode,fDTime);
895 if(!pair) continue;
f77f13c8 896 if(AliDebugLevel()>=4){
aacedc3e 897 clusterI->PrintInfo();
898 clusterJ->PrintInfo();
f77f13c8 899 } // end if AliDebugLevel
50d05d7b 900 clusterI->Add(clusterJ);
901 label[j] = 1;
aacedc3e 902 Clusters()->RemoveAt(j);
50d05d7b 903 j=i; // <- Ernesto
904 } // J clusters
905 label[i] = 1;
42da2935 906 } // I clusters
aacedc3e 907 Clusters()->Compress();
42da2935 908
909 delete [] label;
910 return;
b0f5e3fc 911}
42da2935 912//________________________________________________________________________
913void AliITSClusterFinderSDD::SelectClusters(){
914 // get number of clusters for this module
aacedc3e 915 Int_t nofClusters = NClusters();
b0f5e3fc 916
42da2935 917 nofClusters -= fNclusters;
918 Int_t i;
919 for(i=0; i<nofClusters; i++) {
aacedc3e 920 AliITSRawClusterSDD *clusterI =(AliITSRawClusterSDD*) Cluster(i);
50d05d7b 921 Int_t rmflg = 0;
aacedc3e 922 Double_t wy = 0.;
50d05d7b 923 if(clusterI->Anodes() != 0.) {
aacedc3e 924 wy = ((Double_t) clusterI->Samples())/clusterI->Anodes();
50d05d7b 925 } // end if
926 Int_t amp = (Int_t) clusterI->PeakAmpl();
927 Int_t cha = (Int_t) clusterI->Q();
928 if(amp < fMinPeak) rmflg = 1;
929 if(cha < fMinCharge) rmflg = 1;
930 if(wy < fMinNCells) rmflg = 1;
931 //if(wy > fMaxNCells) rmflg = 1;
aacedc3e 932 if(rmflg) Clusters()->RemoveAt(i);
42da2935 933 } // I clusters
aacedc3e 934 Clusters()->Compress();
42da2935 935 return;
b0f5e3fc 936}
42da2935 937
42da2935 938//______________________________________________________________________
4952f440 939void AliITSClusterFinderSDD::GetRecPoints(AliITSCalibrationSDD* cal){
42da2935 940 // get rec points
04366a57 941
42da2935 942 // get number of clusters for this module
aacedc3e 943 Int_t nofClusters = NClusters();
42da2935 944 nofClusters -= fNclusters;
aacedc3e 945 const Double_t kconvGeV = 1.e-6; // GeV -> KeV
946 const Double_t kconv = 1.0e-4;
4952f440 947 const Double_t kcmToMicrons = 10000.;
aacedc3e 948 const Double_t kRMSx = 38.0*kconv; // microns->cm ITS TDR Table 1.3
949 const Double_t kRMSz = 28.0*kconv; // microns->cm ITS TDR Table 1.3
4952f440 950 Int_t nAnodes=GetSeg()->NpzHalf();
d86f531c 951 Int_t i;
42da2935 952 Int_t ix, iz, idx=-1;
953 AliITSdigitSDD *dig=0;
aacedc3e 954 Int_t ndigits=NDigits();
00a7cc50 955
956 Int_t lay,lad,det;
957 fDetTypeRec->GetITSgeom()->GetModuleId(fModule,lay,lad,det);
958 Int_t ind=(lad-1)*fDetTypeRec->GetITSgeom()->GetNdetectors(lay)+(det-1);
959 Int_t lyr=(lay-1);
960
961
42da2935 962 for(i=0; i<nofClusters; i++) {
aacedc3e 963 AliITSRawClusterSDD *clusterI = (AliITSRawClusterSDD*)Cluster(i);
50d05d7b 964 if(!clusterI) Error("SDD: GetRecPoints","i clusterI ",i,clusterI);
965 if(clusterI) idx=clusterI->PeakPos();
966 if(idx>ndigits) Error("SDD: GetRecPoints","idx ndigits",idx,ndigits);
967 // try peak neighbours - to be done
aacedc3e 968 if(idx&&idx<= ndigits) dig =(AliITSdigitSDD*)GetDigit(idx);
d86f531c 969 if(!dig) {
50d05d7b 970 // try cog
4952f440 971 Float_t xMicrons=clusterI->X()*kcmToMicrons;
972 Float_t zMicrons=clusterI->Z()*kcmToMicrons;
973 Float_t zAnode=zMicrons/GetSeg()->Dpz(0)+nAnodes/2;
974 Float_t driftSpeed=cal->GetDriftSpeedAtAnode(zAnode);
975 Float_t driftPath=GetSeg()->Dx()-TMath::Abs(xMicrons);
976 ix=1+(Int_t)(driftPath/driftSpeed/GetSeg()->Dpx(0));
977 iz=1+(Int_t)zAnode;
978 if(xMicrons>0) iz+=nAnodes;
aacedc3e 979 dig = (AliITSdigitSDD*)Map()->GetHit(iz-1,ix-1);
50d05d7b 980 // if null try neighbours
aacedc3e 981 if (!dig) dig = (AliITSdigitSDD*)Map()->GetHit(iz-1,ix);
982 if (!dig) dig = (AliITSdigitSDD*)Map()->GetHit(iz-1,ix+1);
50d05d7b 983 if (!dig) printf("SDD: cannot assign the track number!\n");
984 } // end if !dig
75fb37cc 985
986 Int_t lab[4] = {-3141593,-3141593,-3141593,ind};
987 if (dig) {
988 lab[0] = dig->GetTrack(0);
989 lab[1] = dig->GetTrack(1);
990 lab[2] = dig->GetTrack(2);
991 }
992 Float_t hit[5] = {clusterI->X(),clusterI->Z(),kRMSx*kRMSx,kRMSz*kRMSz,clusterI->Q()};
993 Int_t info[3] = {0,0,lyr};
994
995 AliITSRecPoint rnew(lab,hit,info,kTRUE);
50d05d7b 996 rnew.SetdEdX(kconvGeV*clusterI->Q());
d86f531c 997
7d62fb64 998 fDetTypeRec->AddRecPoint(rnew);
42da2935 999 } // I clusters
aacedc3e 1000// Map()->ClearMap();
b0f5e3fc 1001}
42da2935 1002//______________________________________________________________________
1003void AliITSClusterFinderSDD::FindRawClusters(Int_t mod){
1004 // find raw clusters
50d05d7b 1005
aacedc3e 1006 SetModule(mod);
f45f6658 1007 SetCutAmplitude(mod);
4952f440 1008 AliITSCalibrationSDD* cal = (AliITSCalibrationSDD*)GetResp(mod);
f45f6658 1009 Int_t nanodes=GetSeg()->Npz();
1010 Int_t noise=0;
1011 for(Int_t i=0;i<nanodes;i++){
4952f440 1012 noise+=(Int_t)cal->GetNoiseAfterElectronics(i);
f45f6658 1013 }
1014 SetMinPeak((noise/nanodes)*5);
a1f090e0 1015 Find1DClustersE();
b0f5e3fc 1016 GroupClusters();
1017 SelectClusters();
04366a57 1018 ResolveClusters();
4952f440 1019 GetRecPoints(cal);
b0f5e3fc 1020}
42da2935 1021//_______________________________________________________________________
d2f55a22 1022void AliITSClusterFinderSDD::PrintStatus() const{
42da2935 1023 // Print SDD cluster finder Parameters
1024
1025 cout << "**************************************************" << endl;
1026 cout << " Silicon Drift Detector Cluster Finder Parameters " << endl;
1027 cout << "**************************************************" << endl;
1028 cout << "Number of Clusters: " << fNclusters << endl;
1029 cout << "Anode Tolerance: " << fDAnode << endl;
1030 cout << "Time Tolerance: " << fDTime << endl;
1031 cout << "Time correction (electronics): " << fTimeCorr << endl;
f45f6658 1032 cout << "Cut Amplitude (threshold): " << fCutAmplitude[0] << endl;
42da2935 1033 cout << "Minimum Amplitude: " << fMinPeak << endl;
1034 cout << "Minimum Charge: " << fMinCharge << endl;
1035 cout << "Minimum number of cells/clusters: " << fMinNCells << endl;
1036 cout << "Maximum number of cells/clusters: " << fMaxNCells << endl;
1037 cout << "**************************************************" << endl;
a1f090e0 1038}
404c1c29 1039
1040//_________________________________________________________________________
1041void AliITSClusterFinderSDD::CorrectPosition(Double_t &z, Double_t&y){
1042 //correction of coordinates using the maps stored in the DB
1043
1044 AliITSCalibrationSDD* cal = (AliITSCalibrationSDD*)GetResp(fModule);
1045 static const Int_t nbint = cal->GetMapTimeNBin();
1046 static const Int_t nbina = cal->Chips()*cal->Channels();
1047 Float_t stepa = (GetSeg()->Dpz(0))/10000.; //anode pitch in cm
1048 Float_t stept = (GetSeg()->Dx()/cal->GetMapTimeNBin()/2.)/10.;
1049
1050 Int_t bint = TMath::Abs((Int_t)(y/stept));
1051 if(y>=0) bint+=(Int_t)(nbint/2.);
1052 if(bint>nbint) AliError("Wrong bin number!");
1053
1054 Int_t bina = TMath::Abs((Int_t)(z/stepa));
1055 if(z>=0) bina+=(Int_t)(nbina/2.);
1056 if(bina>nbina) AliError("Wrong bin number!");
1057
1058 Double_t devz = (Double_t)cal->GetMapACell(bina,bint)/10000.;
1059 Double_t devx = (Double_t)cal->GetMapTCell(bina,bint)/10000.;
1060 z+=devz;
1061 y+=devx;
1062
1063}