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Added new class AliITSpList dirived from AliITSMap. Used with regards to
[u/mrichter/AliRoot.git] / ITS / AliITSClusterFinderSDD.cxx
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24a1c341 1
b0f5e3fc 2/**************************************************************************
3 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * *
5 * Author: The ALICE Off-line Project. *
6 * Contributors are mentioned in the code where appropriate. *
7 * *
8 * Permission to use, copy, modify and distribute this software and its *
9 * documentation strictly for non-commercial purposes is hereby granted *
10 * without fee, provided that the above copyright notice appears in all *
11 * copies and that both the copyright notice and this permission notice *
12 * appear in the supporting documentation. The authors make no claims *
13 * about the suitability of this software for any purpose. It is *
14 * provided "as is" without express or implied warranty. *
15 **************************************************************************/
16
a1f090e0 17#include <iostream.h>
18
78a228db 19#include <TFile.h>
a1f090e0 20#include <TMath.h>
21#include <math.h>
b0f5e3fc 22
23#include "AliITSClusterFinderSDD.h"
e8189707 24#include "AliITSMapA1.h"
25#include "AliITS.h"
78a228db 26#include "AliITSdigit.h"
27#include "AliITSRawCluster.h"
28#include "AliITSRecPoint.h"
29#include "AliITSsegmentation.h"
5dd4cc39 30#include "AliITSresponseSDD.h"
b0f5e3fc 31#include "AliRun.h"
32
33
34
35ClassImp(AliITSClusterFinderSDD)
36
37//----------------------------------------------------------
38AliITSClusterFinderSDD::AliITSClusterFinderSDD
39(AliITSsegmentation *seg, AliITSresponse *response, TClonesArray *digits, TClonesArray *recp)
40{
5dd4cc39 41 // standard constructor
78a228db 42
b0f5e3fc 43 fSegmentation=seg;
44 fResponse=response;
45 fDigits=digits;
46 fClusters=recp;
47 fNclusters= fClusters->GetEntriesFast();
b0f5e3fc 48 SetCutAmplitude();
49 SetDAnode();
50 SetDTime();
b0f5e3fc 51 SetMinPeak();
78a228db 52 SetMinNCells();
53 SetMaxNCells();
54 SetTimeCorr();
a1f090e0 55 SetMinCharge();
78a228db 56 fMap=new AliITSMapA1(fSegmentation,fDigits,fCutAmplitude);
57
b0f5e3fc 58}
59
60//_____________________________________________________________________________
61AliITSClusterFinderSDD::AliITSClusterFinderSDD()
62{
5dd4cc39 63 // default constructor
b0f5e3fc 64 fSegmentation=0;
65 fResponse=0;
66 fDigits=0;
67 fClusters=0;
68 fNclusters=0;
e8189707 69 fMap=0;
5dd4cc39 70 fCutAmplitude=0;
b0f5e3fc 71 SetDAnode();
72 SetDTime();
b0f5e3fc 73 SetMinPeak();
78a228db 74 SetMinNCells();
75 SetMaxNCells();
76 SetTimeCorr();
a1f090e0 77 SetMinCharge();
b0f5e3fc 78
79}
80
e8189707 81//_____________________________________________________________________________
82AliITSClusterFinderSDD::~AliITSClusterFinderSDD()
83{
84 // destructor
85
86 if(fMap) delete fMap;
e8189707 87
88}
b0f5e3fc 89
5dd4cc39 90//_____________________________________________________________________________
b0f5e3fc 91
5dd4cc39 92void AliITSClusterFinderSDD::SetCutAmplitude(Float_t nsigma)
93{
94 // set the signal threshold for cluster finder
b0f5e3fc 95
5dd4cc39 96 Float_t baseline,noise;
97 fResponse->GetNoiseParam(noise,baseline);
98 Float_t noise_after_el = ((AliITSresponseSDD*)fResponse)->GetNoiseAfterElectronics();
99 fCutAmplitude=(Int_t)(baseline + nsigma*noise_after_el);
100}
b0f5e3fc 101//_____________________________________________________________________________
102
103void AliITSClusterFinderSDD::Find1DClusters()
104{
105 // find 1D clusters
106
a1f090e0 107 AliITS *iTS=(AliITS*)gAlice->GetModule("ITS");
108
109 // retrieve the parameters
110 Int_t fNofMaps = fSegmentation->Npz();
111 Int_t fMaxNofSamples = fSegmentation->Npx();
112 Int_t fNofAnodes = fNofMaps/2;
113 Int_t dummy=0;
114 Float_t fTimeStep = fSegmentation->Dpx(dummy);
115 Float_t fSddLength = fSegmentation->Dx();
116 Float_t fDriftSpeed = fResponse->DriftSpeed();
117
118 Float_t anodePitch = fSegmentation->Dpz(dummy);
119 // map the signal
120 fMap->SetThreshold(fCutAmplitude);
b0f5e3fc 121
a1f090e0 122 fMap->FillMap();
123
124 Float_t noise;
125 Float_t baseline;
126 fResponse->GetNoiseParam(noise,baseline);
127
128 Int_t nofFoundClusters = 0;
129 Int_t i;
130 Float_t **dfadc = new Float_t*[fNofAnodes];
131 for(i=0;i<fNofAnodes;i++) dfadc[i] = new Float_t[fMaxNofSamples];
132 Float_t fadc = 0.;
133 Float_t fadc1 = 0.;
134 Float_t fadc2 = 0.;
135 Int_t j,k,idx,l,m;
136 for(j=0;j<2;j++) {
137 for(k=0;k<fNofAnodes;k++) {
138 idx = j*fNofAnodes+k;
139 // signal (fadc) & derivative (dfadc)
140 dfadc[k][255]=0.;
141 for(l=0; l<fMaxNofSamples; l++) {
142 fadc2=(Float_t)fMap->GetSignal(idx,l);
143 if(l>0) fadc1=(Float_t)fMap->GetSignal(idx,l-1);
144 if(l>0) dfadc[k][l-1] = fadc2-fadc1;
145 } // samples
146 } // anodes
b0f5e3fc 147
a1f090e0 148 for(k=0;k<fNofAnodes;k++) {
149 //cout << "Anode: " << k+1 << ", Wing: " << j+1 << endl;
150 idx = j*fNofAnodes+k;
151
152 Int_t imax = 0;
153 Int_t imaxd = 0;
154 Int_t it=0;
155 while(it <= fMaxNofSamples-3) {
b0f5e3fc 156
a1f090e0 157 imax = it;
158 imaxd = it;
159 // maximum of signal
b0f5e3fc 160
a1f090e0 161 Float_t fadcmax = 0.;
162 Float_t dfadcmax = 0.;
163 Int_t lthrmina = 1;
164 Int_t lthrmint = 3;
b0f5e3fc 165
a1f090e0 166 Int_t lthra = 1;
167 Int_t lthrt = 0;
b0f5e3fc 168
a1f090e0 169 for(m=0;m<20;m++) {
170 Int_t id = it+m;
171 if(id>=fMaxNofSamples) break;
172 fadc=(float)fMap->GetSignal(idx,id);
173 if(fadc > fadcmax) { fadcmax = fadc; imax = id;}
174 if(fadc > (float)fCutAmplitude) {
175 lthrt++;
176 }
177
178 if(dfadc[k][id] > dfadcmax) {
179 dfadcmax = dfadc[k][id];
180 imaxd = id;
181 }
182 }
183 it = imaxd;
b0f5e3fc 184
a1f090e0 185 if(fMap->TestHit(idx,imax) == kEmpty) {it++; continue;}
186
187 // cluster charge
188 Int_t tstart = it-2;
189 if(tstart < 0) tstart = 0;
190
191 Bool_t ilcl = 0;
192 if(lthrt >= lthrmint && lthra >= lthrmina) ilcl = 1;
193
194 if(ilcl) {
195 nofFoundClusters++;
196
197 Int_t tstop = tstart;
198 Float_t dfadcmin = 10000.;
199 Int_t ij;
200 for(ij=0; ij<20; ij++) {
201 if(tstart+ij > 255) { tstop = 255; break; }
202 fadc=(float)fMap->GetSignal(idx,tstart+ij);
203 if((dfadc[k][tstart+ij] < dfadcmin) && (fadc > fCutAmplitude)) {
204 tstop = tstart+ij+5;
205 if(tstop > 255) tstop = 255;
206 dfadcmin = dfadc[k][it+ij];
207 }
208 }
209
210 Float_t clusterCharge = 0.;
211 Float_t clusterAnode = k+0.5;
212 Float_t clusterTime = 0.;
213 Float_t clusterMult = 0.;
214 Float_t clusterPeakAmplitude = 0.;
215 Int_t its,peakpos=-1;
216 Float_t n, baseline;
217 fResponse->GetNoiseParam(n,baseline);
218 for(its=tstart; its<=tstop; its++) {
219 fadc=(float)fMap->GetSignal(idx,its);
220 if(fadc>baseline)
221 fadc-=baseline;
222 else
223 fadc=0.;
224 clusterCharge += fadc;
225 // as a matter of fact we should take the peak pos before FFT
226 // to get the list of tracks !!!
227 if(fadc > clusterPeakAmplitude) {
228 clusterPeakAmplitude = fadc;
229 //peakpos=fMap->GetHitIndex(idx,its);
230 Int_t shift=(int)(fTimeCorr/fTimeStep);
231 if(its>shift && its<(fMaxNofSamples-shift)) peakpos=fMap->GetHitIndex(idx,its+shift);
232 else peakpos=fMap->GetHitIndex(idx,its);
233 if(peakpos<0) peakpos=fMap->GetHitIndex(idx,its);
234 }
235 clusterTime += fadc*its;
236 if(fadc > 0) clusterMult++;
237 if(its == tstop) {
238 clusterTime /= (clusterCharge/fTimeStep); // ns
239 if(clusterTime > fTimeCorr) clusterTime -= fTimeCorr; // ns
240 }
241 }
242
243 Float_t clusteranodePath = (clusterAnode - fNofAnodes/2)*anodePitch;
244 Float_t clusterDriftPath = clusterTime*fDriftSpeed;
245 clusterDriftPath = fSddLength-clusterDriftPath;
246
247 if(clusterCharge <= 0.) break;
248 AliITSRawClusterSDD clust(j+1,clusterAnode,clusterTime,clusterCharge,clusterPeakAmplitude,peakpos,0.,0.,clusterDriftPath,clusteranodePath,clusterMult,0,0,0,0,0,0,0);
249 iTS->AddCluster(1,&clust);
250 it = tstop;
b0f5e3fc 251 } // ilcl
252
253 it++;
254
255 } // while (samples)
256 } // anodes
257 } // detectors (2)
a1f090e0 258
259 //fMap->ClearMap();
44b3710f 260
78a228db 261 for(i=0;i<fNofAnodes;i++) delete[] dfadc[i];
44b3710f 262 delete [] dfadc;
a1f090e0 263
264 return;
265
266}
267
268//_____________________________________________________________________________
269
270void AliITSClusterFinderSDD::Find1DClustersE()
271{
24a1c341 272 // find 1D clusters
a1f090e0 273
274 AliITS *iTS=(AliITS*)gAlice->GetModule("ITS");
275
276 // retrieve the parameters
277 Int_t fNofMaps = fSegmentation->Npz();
278 Int_t fMaxNofSamples = fSegmentation->Npx();
279 Int_t fNofAnodes = fNofMaps/2;
280 Int_t dummy=0;
281 Float_t fTimeStep = fSegmentation->Dpx( dummy );
282 Float_t fSddLength = fSegmentation->Dx();
283 Float_t fDriftSpeed = fResponse->DriftSpeed();
284 Float_t anodePitch = fSegmentation->Dpz( dummy );
285 Float_t n, baseline;
286 fResponse->GetNoiseParam( n, baseline );
287
288 // map the signal
289 fMap->SetThreshold( fCutAmplitude );
290 fMap->FillMap();
291 Int_t nClu = 0;
292
293// cout << "Search cluster... "<< endl;
294 for( Int_t j=0; j<2; j++ )
295 {
296 for( Int_t k=0; k<fNofAnodes; k++ )
297 {
298 Int_t idx = j*fNofAnodes+k;
299
24a1c341 300 Bool_t on = kFALSE;
a1f090e0 301 Int_t start = 0;
302 Int_t nTsteps = 0;
303 Float_t fmax = 0.;
304 Int_t lmax = 0;
305 Float_t charge = 0.;
306 Float_t time = 0.;
307 Float_t anode = k+0.5;
308 Int_t peakpos = -1;
309
310 for( Int_t l=0; l<fMaxNofSamples; l++ )
311 {
312 Float_t fadc = (Float_t)fMap->GetSignal( idx, l );
313 if( fadc > 0.0 )
314 {
24a1c341 315 if( on == kFALSE && l<fMaxNofSamples-4) // star RawCluster (reset var.)
a1f090e0 316 {
317 Float_t fadc1 = (Float_t)fMap->GetSignal( idx, l+1 );
318 if( fadc1 < fadc ) continue;
319 start = l;
320 fmax = 0.;
321 lmax = 0;
322 time = 0.;
323 charge = 0.;
24a1c341 324 on = kTRUE;
a1f090e0 325 nTsteps = 0;
326 }
327
328 nTsteps++ ;
329 if( fadc > baseline )
330 fadc -= baseline;
331 else
332 fadc=0.;
333
334 charge += fadc;
335 time += fadc*l;
336
337 if( fadc > fmax )
338 {
339 fmax = fadc;
340 lmax = l;
341 Int_t shift = (Int_t)(fTimeCorr/fTimeStep + 0.5);
342 if( l > shift && l < (fMaxNofSamples-shift) )
343 peakpos = fMap->GetHitIndex( idx, l+shift );
24a1c341 344 else
a1f090e0 345 peakpos = fMap->GetHitIndex( idx, l );
24a1c341 346 if( peakpos < 0 ) peakpos = fMap->GetHitIndex( idx, l );
a1f090e0 347 }
348 }
349 else
350 {
24a1c341 351 if( on == kTRUE )
a1f090e0 352 {
353 if( nTsteps > 2 ) // min # of timesteps for a RawCluster
354 {
355 // Found a RawCluster...
356 Int_t stop = l-1;
357 time /= (charge/fTimeStep); // ns
358 // time = lmax*fTimeStep; // ns
359 if( time > fTimeCorr ) time -= fTimeCorr; // ns
360 Float_t anodePath = (anode - fNofAnodes/2)*anodePitch;
24a1c341 361 Float_t driftPath = time*fDriftSpeed;
362 driftPath = fSddLength-driftPath;
a1f090e0 363 AliITSRawClusterSDD clust( j+1, anode, time, charge,
24a1c341 364 fmax, peakpos, 0., 0., driftPath, anodePath, nTsteps
a1f090e0 365 , start, stop, start, stop, 1, k, k );
24a1c341 366 iTS->AddCluster( 1, &clust );
a1f090e0 367 // clust.PrintInfo();
368 nClu++;
369 }
24a1c341 370 on = kFALSE;
a1f090e0 371 }
372 }
24a1c341 373 } // samples
a1f090e0 374 } // anodes
375 } // wings
376
377// cout << "# Rawclusters " << nClu << endl;
378 return;
379
380}
381
382//_____________________________________________________________________________
383
384Int_t AliITSClusterFinderSDD::SearchPeak( Float_t *spect, Int_t xdim, Int_t zdim,
385 Int_t *peakX, Int_t *peakZ, Float_t *peakAmp, Float_t minpeak )
386{
24a1c341 387 // search peaks on a 2D cluster
a1f090e0 388 Int_t npeak = 0; // # peaks
56fff130 389 Int_t i,j;
a1f090e0 390
391 // search peaks
392 for( Int_t z=1; z<zdim-1; z++ )
393 {
394 for( Int_t x=2; x<xdim-3; x++ )
395 {
24a1c341 396 Float_t sxz = spect[x*zdim+z];
397 Float_t sxz1 = spect[(x+1)*zdim+z];
398 Float_t sxz2 = spect[(x-1)*zdim+z];
a1f090e0 399
400 // search a local max. in s[x,z]
24a1c341 401 if( sxz < minpeak || sxz1 <= 0 || sxz2 <= 0 ) continue;
402 if( sxz >= spect[(x+1)*zdim+z ] && sxz >= spect[(x-1)*zdim+z ] &&
403 sxz >= spect[x*zdim +z+1] && sxz >= spect[x*zdim +z-1] &&
404 sxz >= spect[(x+1)*zdim+z+1] && sxz >= spect[(x+1)*zdim+z-1] &&
405 sxz >= spect[(x-1)*zdim+z+1] && sxz >= spect[(x-1)*zdim+z-1] )
a1f090e0 406 {
407 // peak found
408 peakX[npeak] = x;
409 peakZ[npeak] = z;
24a1c341 410 peakAmp[npeak] = sxz;
a1f090e0 411 npeak++;
412 }
413 }
414 }
415
416 // search groups of peaks with same amplitude.
24a1c341 417 Int_t *flag = new Int_t[npeak];
418 for( i=0; i<npeak; i++ ) flag[i] = 0;
56fff130 419 for( i=0; i<npeak; i++ )
a1f090e0 420 {
56fff130 421 for( j=0; j<npeak; j++ )
a1f090e0 422 {
423 if( i==j) continue;
24a1c341 424 if( flag[j] > 0 ) continue;
9e1a0ddb 425 if( peakAmp[i] == peakAmp[j] && TMath::Abs(peakX[i]-peakX[j])<=1 && TMath::Abs(peakZ[i]-peakZ[j])<=1 )
a1f090e0 426 {
24a1c341 427 if( flag[i] == 0) flag[i] = i+1;
428 flag[j] = flag[i];
a1f090e0 429 }
430 }
431 }
432
433 // make average of peak groups
56fff130 434 for( i=0; i<npeak; i++ )
a1f090e0 435 {
436 Int_t nFlag = 1;
24a1c341 437 if( flag[i] <= 0 ) continue;
56fff130 438 for( j=0; j<npeak; j++ )
a1f090e0 439 {
440 if( i==j ) continue;
24a1c341 441 if( flag[j] != flag[i] ) continue;
a1f090e0 442 peakX[i] += peakX[j];
443 peakZ[i] += peakZ[j];
444 nFlag++;
445 npeak--;
446 for( Int_t k=j; k<npeak; k++ )
447 {
448 peakX[k] = peakX[k+1];
449 peakZ[k] = peakZ[k+1];
450 peakAmp[k] = peakAmp[k+1];
24a1c341 451 flag[k] = flag[k+1];
a1f090e0 452 }
453 j--;
454 }
b0f5e3fc 455
a1f090e0 456 if( nFlag > 1 )
457 {
458 peakX[i] /= nFlag;
459 peakZ[i] /= nFlag;
460 }
461 }
462
24a1c341 463 delete [] flag;
a1f090e0 464 return( npeak );
465}
466
467
24a1c341 468void AliITSClusterFinderSDD::PeakFunc( Int_t xdim, Int_t zdim, Float_t *par, Float_t *spe, Float_t
469*integral)
a1f090e0 470{
24a1c341 471 // function used to fit the clusters
472 // par -> paramiters..
473 // par[0] number of peaks.
474 // for each peak i=1, ..., par[0]
475 // par[i] = Ampl.
476 // par[i+1] = xpos
477 // par[i+2] = zpos
478 // par[i+3] = tau
479 // par[i+4] = sigma.
480
481 Int_t electronics = fResponse->Electronics(); // 1 = PASCAL, 2 = OLA
482 const Int_t knParam = 5;
483 Int_t npeak = (Int_t)par[0];
a1f090e0 484
24a1c341 485 memset( spe, 0, sizeof( Float_t )*zdim*xdim );
a1f090e0 486
24a1c341 487 Int_t k = 1;
488 for( Int_t i=0; i<npeak; i++ )
a1f090e0 489 {
24a1c341 490 if( integral != 0 ) integral[i] = 0.;
491 Float_t sigmaA2 = par[k+4]*par[k+4]*2.;
492 Float_t T2 = par[k+3]; // PASCAL
493 if( electronics == 2 ) { T2 *= T2; T2 *= 2; } // OLA
494 for( Int_t z=0; z<zdim; z++ )
495 {
496 for( Int_t x=0; x<xdim; x++ )
497 {
498 Float_t z2 = (z-par[k+2])*(z-par[k+2])/sigmaA2;
499 Float_t x2 = 0.;
500 Float_t signal = 0.;
501 if( electronics == 1 ) // PASCAL
502 {
503 x2 = (x-par[k+1]+T2)/T2;
504 signal = (x2 > 0.) ? par[k] * x2 * exp( -x2+1. - z2 ) : 0.0;
505 // signal = (x2 > 0.) ? par[k] * x2*x2 * exp( -2*x2+2. - z2 ) : 0.0; // RCCR
506 }
507 else
508 if( electronics == 2 ) // OLA
509 {
510 x2 = (x-par[k+1])*(x-par[k+1])/T2;
511 signal = par[k] * exp( -x2 - z2 );
512 }
513 else
514 {
515 cout << "Wrong SDD Electronics =" << electronics << endl;
516 // exit( 1 );
517 }
518 spe[x*zdim+z] += signal;
519 if( integral != 0 ) integral[i] += signal;
520 }
521 }
522 k += knParam;
a1f090e0 523 }
24a1c341 524 return;
a1f090e0 525}
526
b0f5e3fc 527
24a1c341 528Float_t AliITSClusterFinderSDD::ChiSqr( Int_t xdim, Int_t zdim, Float_t *spe, Float_t *speFit )
a1f090e0 529{
530 // EVALUATES UNNORMALIZED CHI-SQUARED
531
532 Float_t chi2 = 0.;
533 for( Int_t z=0; z<zdim; z++ )
534 {
535 for( Int_t x=1; x<xdim-1; x++ )
536 {
537 Int_t index = x*zdim+z;
538 Float_t tmp = spe[index] - speFit[index];
539 chi2 += tmp*tmp;
540 }
541 }
542 return( chi2 );
543}
544
545
24a1c341 546void AliITSClusterFinderSDD::Minim( Int_t xdim, Int_t zdim, Float_t *param, Float_t *prm0, Float_t *steprm, Float_t *chisqr,
a1f090e0 547 Float_t *spe, Float_t *speFit )
548{
24a1c341 549 //
a1f090e0 550 Int_t k, nnn, mmm, i;
551 Float_t p1, delta, d1, chisq1, p2, chisq2, t, p3, chisq3, a, b, p0, chisqt;
552
24a1c341 553 const Int_t knParam = 5;
a1f090e0 554 Int_t npeak = (Int_t)param[0];
24a1c341 555 for( k=1; k<(npeak*knParam+1); k++ ) prm0[k] = param[k];
a1f090e0 556
24a1c341 557 for( k=1; k<(npeak*knParam+1); k++ )
a1f090e0 558 {
559 p1 = param[k];
560 delta = steprm[k];
561 d1 = delta;
562
563 // ENSURE THAT STEP SIZE IS SENSIBLY LARGER THAN MACHINE ROUND OFF
564 if( fabs( p1 ) > 1.0E-6 )
565 if ( fabs( delta/p1 ) < 1.0E-4 ) delta = p1/1000;
566 else delta = (Float_t)1.0E-4;
567
568 // EVALUATE CHI-SQUARED AT FIRST TWO SEARCH POINTS
569 PeakFunc( xdim, zdim, param, speFit );
24a1c341 570 chisq1 = ChiSqr( xdim, zdim, spe, speFit );
a1f090e0 571
572 p2 = p1+delta;
573 param[k] = p2;
574
575 PeakFunc( xdim, zdim, param, speFit );
24a1c341 576 chisq2 = ChiSqr( xdim, zdim, spe, speFit );
a1f090e0 577
578 if( chisq1 < chisq2 )
579 {
580 // REVERSE DIRECTION OF SEARCH IF CHI-SQUARED IS INCREASING
581 delta = -delta;
582 t = p1;
583 p1 = p2;
584 p2 = t;
585 t = chisq1;
586 chisq1 = chisq2;
587 chisq2 = t;
588 }
589
590 i = 1; nnn = 0;
591 do { // INCREMENT param(K) UNTIL CHI-SQUARED STARTS TO INCREASE
592 nnn++;
593 p3 = p2 + delta;
594 mmm = nnn - (nnn/5)*5; // multiplo de 5
595 if( mmm == 0 )
596 {
597 d1 = delta;
598 // INCREASE STEP SIZE IF STEPPING TOWARDS MINIMUM IS TOO SLOW
599 delta *= 5;
600 }
601 param[k] = p3;
602
603 // Constrain paramiters
24a1c341 604 Int_t kpos = (k-1) % knParam;
a1f090e0 605 switch( kpos )
606 {
607 case 0 :
608 if( param[k] <= 20 ) param[k] = fMinPeak;
609 case 1 :
610 if( fabs( param[k] - prm0[k] ) > 1.5 ) param[k] = prm0[k];
611 case 2 :
612 if( fabs( param[k] - prm0[k] ) > 1. ) param[k] = prm0[k];
613 case 3 :
614 if( param[k] < .5 ) param[k] = .5;
615 case 4 :
616 if( param[k] < .288 ) param[k] = .288; // 1/sqrt(12) = 0.288
617 };
618
619 PeakFunc( xdim, zdim, param, speFit );
24a1c341 620 chisq3 = ChiSqr( xdim, zdim, spe, speFit );
a1f090e0 621
622 if( chisq3 < chisq2 && nnn < 50 )
623 {
624 p1 = p2;
625 p2 = p3;
626 chisq1 = chisq2;
627 chisq2 = chisq3;
628 }
629 else i=0;
630
631 } while( i );
632
633 // FIND MINIMUM OF PARABOLA DEFINED BY LAST THREE POINTS
634 a = chisq1*(p2-p3)+chisq2*(p3-p1)+chisq3*(p1-p2);
635 b = chisq1*(p2*p2-p3*p3)+chisq2*(p3*p3-p1*p1)+chisq3*(p1*p1-p2*p2);
636 if( a!=0 ) p0 = (Float_t)(0.5*b/a);
637 else p0 = 10000;
638
639 //---IN CASE OF NEARLY EQUAL CHI-SQUARED AND TOO SMALL STEP SIZE PREVENT
640 // ERRONEOUS EVALUATION OF PARABOLA MINIMUM
641 //---NEXT TWO LINES CAN BE OMITTED FOR HIGHER PRECISION MACHINES
642
643 //dp = (Float_t) max (fabs(p3-p2), fabs(p2-p1));
644 //if( fabs( p2-p0 ) > dp ) p0 = p2;
645 param[k] = p0;
646
647 // Constrain paramiters
24a1c341 648 Int_t kpos = (k-1) % knParam;
a1f090e0 649 switch( kpos )
650 {
651 case 0 :
652 if( param[k] <= 20 ) param[k] = fMinPeak;
653 case 1 :
654 if( fabs( param[k] - prm0[k] ) > 1.5 ) param[k] = prm0[k];
655 case 2 :
656 if( fabs( param[k] - prm0[k] ) > 1. ) param[k] = prm0[k];
657 case 3 :
658 if( param[k] < .5 ) param[k] = .5;
659 case 4 :
660 if( param[k] < .288 ) param[k] = .288; // 1/sqrt(12) = 0.288
661 };
662
663 PeakFunc( xdim, zdim, param, speFit );
24a1c341 664 chisqt = ChiSqr( xdim, zdim, spe, speFit );
a1f090e0 665
666 // DO NOT ALLOW ERRONEOUS INTERPOLATION
667 if( chisqt <= *chisqr )
668 *chisqr = chisqt;
669 else
670 param[k] = prm0[k];
671
672 // OPTIMIZE SEARCH STEP FOR EVENTUAL NEXT CALL OF MINIM
673 steprm[k] = (param[k]-prm0[k])/5;
674 if( steprm[k] >= d1 ) steprm[k] = d1/5;
675 }
676
677 // EVALUATE FIT AND CHI-SQUARED FOR OPTIMIZED PARAMETERS
678 PeakFunc( xdim, zdim, param, speFit );
24a1c341 679 *chisqr = ChiSqr( xdim, zdim, spe, speFit );
a1f090e0 680 return;
681}
682
24a1c341 683
684Int_t AliITSClusterFinderSDD::NoLinearFit( Int_t xdim, Int_t zdim, Float_t *param, Float_t *spe, Int_t *niter, Float_t *chir )
a1f090e0 685{
24a1c341 686 // fit method from Comput. Phys. Commun 46(1987) 149
687 const Float_t kchilmt = 0.01; // relative accuracy
688 const Int_t knel = 3; // for parabolic minimization
689 const Int_t knstop = 50; // Max. iteration number
690 const Int_t knParam = 5;
a1f090e0 691
692 Int_t npeak = (Int_t)param[0];
693
694 // RETURN IF NUMBER OF DEGREES OF FREEDOM IS NOT POSITIVE
24a1c341 695 if( (xdim*zdim - npeak*knParam) <= 0 ) return( -1 );
696 Float_t degFree = (xdim*zdim - npeak*knParam)-1;
a1f090e0 697
24a1c341 698 Int_t n, k, iterNum = 0;
699 Float_t *prm0 = new Float_t[npeak*knParam+1];
700 Float_t *step = new Float_t[npeak*knParam+1];
701 Float_t *schi = new Float_t[npeak*knParam+1];
a1f090e0 702 Float_t *sprm[3];
24a1c341 703 sprm[0] = new Float_t[npeak*knParam+1];
704 sprm[1] = new Float_t[npeak*knParam+1];
705 sprm[2] = new Float_t[npeak*knParam+1];
a1f090e0 706
707 Float_t chi0, chi1, reldif, a, b, prmin, dp;
708
709 Float_t *speFit = new Float_t[ xdim*zdim ];
710 PeakFunc( xdim, zdim, param, speFit );
24a1c341 711 chi0 = ChiSqr( xdim, zdim, spe, speFit );
a1f090e0 712 chi1 = chi0;
713
714
24a1c341 715 for( k=1; k<(npeak*knParam+1); k++) prm0[k] = param[k];
a1f090e0 716
24a1c341 717 for( k=1 ; k<(npeak*knParam+1); k+=knParam )
a1f090e0 718 {
719 step[k] = param[k] / 20.0 ;
720 step[k+1] = param[k+1] / 50.0;
721 step[k+2] = param[k+2] / 50.0;
722 step[k+3] = param[k+3] / 20.0;
723 step[k+4] = param[k+4] / 20.0;
724 }
725
726 Int_t out = 0;
727 do
728 {
24a1c341 729 iterNum++;
a1f090e0 730 chi0 = chi1;
731
24a1c341 732 Minim( xdim, zdim, param, prm0, step, &chi1, spe, speFit );
a1f090e0 733 reldif = ( chi1 > 0 ) ? ((Float_t) fabs( chi1-chi0)/chi1 ) : 0;
734
735 // EXIT conditions
24a1c341 736 if( reldif < (float) kchilmt )
a1f090e0 737 {
24a1c341 738 *chir = (chi1>0) ? (float) TMath::Sqrt (chi1/degFree) :0;
739 *niter = iterNum;
a1f090e0 740 out = 0;
741 break;
742 }
743
24a1c341 744 if( (reldif < (float)(5*kchilmt)) && (iterNum > knstop) )
a1f090e0 745 {
24a1c341 746 *chir = (chi1>0) ?(float) TMath::Sqrt (chi1/degFree):0;
747 *niter = iterNum;
a1f090e0 748 out = 0;
749 break;
750 }
751
24a1c341 752 if( iterNum > 5*knstop )
a1f090e0 753 {
24a1c341 754 *chir = (chi1>0) ?(float) TMath::Sqrt (chi1/degFree):0;
755 *niter = iterNum;
a1f090e0 756 out = 1;
757 break;
758 }
759
24a1c341 760 if( iterNum <= knel ) continue;
a1f090e0 761
24a1c341 762 n = iterNum - (iterNum/knel)*knel; // EXTRAPOLATION LIMIT COUNTER N
a1f090e0 763 if( n > 3 || n == 0 ) continue;
764 schi[n-1] = chi1;
24a1c341 765 for( k=1; k<(npeak*knParam+1); k++ ) sprm[n-1][k] = param[k];
a1f090e0 766 if( n != 3 ) continue;
767
768 // -EVALUATE EXTRAPOLATED VALUE OF EACH PARAMETER BY FINDING MINIMUM OF
769 // PARABOLA DEFINED BY LAST THREE CALLS OF MINIM
770
24a1c341 771 for( k=1; k<(npeak*knParam+1); k++ )
a1f090e0 772 {
773 Float_t tmp0 = sprm[0][k];
774 Float_t tmp1 = sprm[1][k];
775 Float_t tmp2 = sprm[2][k];
776 a = schi[0]*(tmp1-tmp2) + schi[1]*(tmp2-tmp0);
777 a += (schi[2]*(tmp0-tmp1));
778 b = schi[0]*(tmp1*tmp1-tmp2*tmp2);
779 b += (schi[1]*(tmp2*tmp2-tmp0*tmp0)+(schi[2]*(tmp0*tmp0-tmp1*tmp1)));
780 if ((double)a < 1.0E-6) prmin = 0;
781 else prmin = (float) (0.5*b/a);
782 dp = 5*(tmp2-tmp0);
783
784 if (fabs(prmin-tmp2) > fabs(dp)) prmin = tmp2+dp;
785 param[k] = prmin;
786 step[k] = dp/10; // OPTIMIZE SEARCH STEP
787 }
788
789 } while( kTRUE );
790
791 delete [] prm0;
792 delete [] step;
793 delete [] schi;
794 delete [] sprm[0];
795 delete [] sprm[1];
796 delete [] sprm[2];
797 delete [] speFit;
798
799 return( out );
800}
801//_____________________________________________________________________________
802void AliITSClusterFinderSDD::ResolveClustersE()
803{
804 // The function to resolve clusters if the clusters overlapping exists
805
24a1c341 806 Int_t i;
56fff130 807
a1f090e0 808 AliITS *iTS = (AliITS*)gAlice->GetModule( "ITS" );
809 // get number of clusters for this module
810 Int_t nofClusters = fClusters->GetEntriesFast();
811 nofClusters -= fNclusters;
812
813 Int_t fNofMaps = fSegmentation->Npz();
814 Int_t fNofAnodes = fNofMaps/2;
815 Int_t fMaxNofSamples = fSegmentation->Npx();
816 Int_t dummy=0;
817 Double_t fTimeStep = fSegmentation->Dpx( dummy );
818 Double_t fSddLength = fSegmentation->Dx();
819 Double_t fDriftSpeed = fResponse->DriftSpeed();
820 Double_t anodePitch = fSegmentation->Dpz( dummy );
821 Float_t n, baseline;
822 fResponse->GetNoiseParam( n, baseline );
24a1c341 823 Int_t electronics = fResponse->Electronics(); // 1 = PASCAL, 2 = OLA
a1f090e0 824
825 // fill Map of signals
826 fMap->FillMap();
827
828 for( Int_t j=0; j<nofClusters; j++ )
829 {
830 // get cluster information
831 AliITSRawClusterSDD *clusterJ = (AliITSRawClusterSDD*) fClusters->At( j );
832 Int_t astart = clusterJ->Astart();
833 Int_t astop = clusterJ->Astop();
834 Int_t tstart = clusterJ->Tstartf();
835 Int_t tstop = clusterJ->Tstopf();
836 Int_t wing = (Int_t)clusterJ->W();
837 if( wing == 2 )
838 {
839 astart += fNofAnodes;
840 astop += fNofAnodes;
841 }
842 Int_t xdim = tstop-tstart+3;
843 Int_t zdim = astop-astart+3;
844 Float_t *sp = new Float_t[ xdim*zdim+1 ];
845 memset( sp, 0, sizeof(Float_t)*(xdim*zdim+1) );
846
847 // make a local map from cluster region
848 for( Int_t ianode=astart; ianode<=astop; ianode++ )
849 {
850 for( Int_t itime=tstart; itime<=tstop; itime++ )
851 {
852 Float_t fadc = fMap->GetSignal( ianode, itime );
853 if( fadc > baseline ) fadc -= (Double_t)baseline;
854 else fadc = 0.;
855 Int_t index = (itime-tstart+1)*zdim+(ianode-astart+1);
856 sp[index] = fadc;
857 } // time loop
858 } // anode loop
859
860 // search peaks on cluster
24a1c341 861 const Int_t kNp = 150;
862 Int_t peakX1[kNp];
863 Int_t peakZ1[kNp];
864 Float_t peakAmp1[kNp];
a1f090e0 865 Int_t npeak = SearchPeak( sp, xdim, zdim, peakX1, peakZ1, peakAmp1, fMinPeak );
866
867 // if multiple peaks, split cluster
868 if( npeak >= 1 )
869 {
870 // cout << "npeak " << npeak << endl;
871 // clusterJ->PrintInfo();
872
873 Float_t *par = new Float_t[npeak*5+1];
874 par[0] = (Float_t)npeak;
875
876 // Initial paramiters in cell dimentions
877 Int_t k1 = 1;
24a1c341 878 for( i=0; i<npeak; i++ )
879 {
880 par[k1] = peakAmp1[i];
881 par[k1+1] = peakX1[i]; // local time pos. [timebin]
882 par[k1+2] = peakZ1[i]; // local anode pos. [anodepitch]
883 if( electronics == 1 )
884 par[k1+3] = 2.; // PASCAL
885 else if( electronics == 2 )
886 par[k1+3] = 0.7; // tau [timebin] OLA
887 par[k1+4] = .4; // sigma [anodepich]
888 k1+=5;
a1f090e0 889 }
890 Int_t niter;
891 Float_t chir;
24a1c341 892 NoLinearFit( xdim, zdim, par, sp, &niter, &chir );
893
894 Float_t peakX[kNp];
895 Float_t peakZ[kNp];
896 Float_t sigma[kNp];
897 Float_t tau[kNp];
898 Float_t peakAmp[kNp];
899 Float_t integral[kNp];
a1f090e0 900
901 //get integrals => charge for each peak
24a1c341 902 PeakFunc( xdim, zdim, par, sp, integral );
a1f090e0 903
904 k1 = 1;
56fff130 905 for( i=0; i<npeak; i++ )
a1f090e0 906 {
907 peakAmp[i] = par[k1];
908 peakX[i] = par[k1+1];
909 peakZ[i] = par[k1+2];
910 tau[i] = par[k1+3];
911 sigma[i] = par[k1+4];
912 k1+=5;
913 }
914
915 // calculate paramiter for new clusters
56fff130 916 for( i=0; i<npeak; i++ )
a1f090e0 917 {
918 AliITSRawClusterSDD clusterI( *clusterJ );
919 Int_t newAnode = peakZ1[i]-1 + astart;
920 Int_t newiTime = peakX1[i]-1 + tstart;
921
922 Int_t shift = (Int_t)(fTimeCorr/fTimeStep + 0.5);
923 if( newiTime > shift && newiTime < (fMaxNofSamples-shift) ) shift = 0;
924 Int_t peakpos = fMap->GetHitIndex( newAnode, newiTime+shift );
925 clusterI.SetPeakPos( peakpos );
926 clusterI.SetPeakAmpl( peakAmp1[i] );
927
928 Float_t newAnodef = peakZ[i] - 0.5 + astart;
929 Float_t newiTimef = peakX[i] - 1 + tstart;
930 if( wing == 2 ) newAnodef -= fNofAnodes;
24a1c341 931 Float_t anodePath = (newAnodef - fNofAnodes/2)*anodePitch;
a1f090e0 932 newiTimef *= fTimeStep;
933 if( newiTimef > fTimeCorr ) newiTimef -= fTimeCorr;
24a1c341 934 if( electronics == 1 )
935 {
936 newiTimef *= 0.999438; // PASCAL
937 newiTimef += (6./fDriftSpeed - newiTimef/3000.);
a1f090e0 938 }
24a1c341 939 else if( electronics == 2 )
940 newiTimef *= 0.99714; // OLA
a1f090e0 941
24a1c341 942 Float_t driftPath = fSddLength - newiTimef * fDriftSpeed;
a1f090e0 943 Float_t sign = ( wing == 1 ) ? -1. : 1.;
24a1c341 944 clusterI.SetX( driftPath*sign * 0.0001 );
945 clusterI.SetZ( anodePath * 0.0001 );
a1f090e0 946 clusterI.SetAnode( newAnodef );
947 clusterI.SetTime( newiTimef );
948 clusterI.SetAsigma( sigma[i]*anodePitch );
949 clusterI.SetTsigma( tau[i]*fTimeStep );
24a1c341 950 clusterI.SetQ( integral[i] );
a1f090e0 951
952 // clusterI.PrintInfo();
953 iTS->AddCluster( 1, &clusterI );
954 }
955 fClusters->RemoveAt( j );
956 delete [] par;
957 }
958 else cout <<" --- Peak not found!!!! minpeak=" << fMinPeak<<
959 " cluster peak=" << clusterJ->PeakAmpl() << endl << endl;
960
961 delete [] sp;
962 } // cluster loop
963
964 fClusters->Compress();
965 fMap->ClearMap();
966}
967
b0f5e3fc 968
969//_____________________________________________________________________________
970void AliITSClusterFinderSDD::GroupClusters()
971{
972 // group clusters
973 Int_t dummy=0;
974 Float_t fTimeStep = fSegmentation->Dpx(dummy);
975
976
977 // get number of clusters for this module
978 Int_t nofClusters = fClusters->GetEntriesFast();
979 nofClusters -= fNclusters;
980
b0f5e3fc 981 AliITSRawClusterSDD *clusterI;
982 AliITSRawClusterSDD *clusterJ;
983
44b3710f 984 Int_t *label = new Int_t [nofClusters];
b0f5e3fc 985 Int_t i,j;
986 for(i=0; i<nofClusters; i++) label[i] = 0;
987 for(i=0; i<nofClusters; i++) {
988 if(label[i] != 0) continue;
989 for(j=i+1; j<nofClusters; j++) {
990 if(label[j] != 0) continue;
991 clusterI = (AliITSRawClusterSDD*) fClusters->At(i);
992 clusterJ = (AliITSRawClusterSDD*) fClusters->At(j);
993 // 1.3 good
a1f090e0 994 if(clusterI->T() < fTimeStep*60) fDAnode = 4.2; // TB 3.2
995 if(clusterI->T() < fTimeStep*10) fDAnode = 1.5; // TB 1.
b0f5e3fc 996 Bool_t pair = clusterI->Brother(clusterJ,fDAnode,fDTime);
997 if(!pair) continue;
e8189707 998 // clusterI->PrintInfo();
999 // clusterJ->PrintInfo();
b0f5e3fc 1000 clusterI->Add(clusterJ);
1001 label[j] = 1;
1002 fClusters->RemoveAt(j);
a1f090e0 1003 j=i; // <- Ernesto
b0f5e3fc 1004 } // J clusters
1005 label[i] = 1;
1006 } // I clusters
1007 fClusters->Compress();
44b3710f 1008
1009 delete [] label;
b0f5e3fc 1010 return;
1011
1012}
1013
1014//_____________________________________________________________________________
1015
1016void AliITSClusterFinderSDD::SelectClusters()
1017{
1018 // get number of clusters for this module
1019 Int_t nofClusters = fClusters->GetEntriesFast();
1020 nofClusters -= fNclusters;
1021
b0f5e3fc 1022 Int_t i;
1023 for(i=0; i<nofClusters; i++) {
1024 AliITSRawClusterSDD *clusterI = (AliITSRawClusterSDD*) fClusters->At(i);
1025 Int_t rmflg = 0;
1026 Float_t wy = 0.;
1027 if(clusterI->Anodes() != 0.) {
1028 wy = ((Float_t) clusterI->Samples())/clusterI->Anodes();
1029 }
a1f090e0 1030 Int_t amp = (Int_t) clusterI->PeakAmpl();
1031 Int_t cha = (Int_t) clusterI->Q();
b0f5e3fc 1032 if(amp < fMinPeak) rmflg = 1;
a1f090e0 1033 if(cha < fMinCharge) rmflg = 1;
b0f5e3fc 1034 if(wy < fMinNCells) rmflg = 1;
78a228db 1035 //if(wy > fMaxNCells) rmflg = 1;
b0f5e3fc 1036 if(rmflg) fClusters->RemoveAt(i);
1037 } // I clusters
1038 fClusters->Compress();
1039 return;
1040
1041}
1042
a1f090e0 1043//_____________________________________________________________________________
1044
1045void AliITSClusterFinderSDD::ResolveClusters()
1046{
24a1c341 1047/*
a1f090e0 1048// The function to resolve clusters if the clusters overlapping exists
1049
1050 AliITS *iTS=(AliITS*)gAlice->GetModule("ITS");
1051
1052 // get number of clusters for this module
1053 Int_t nofClusters = fClusters->GetEntriesFast();
1054 nofClusters -= fNclusters;
1055 // cout<<"Resolve Cl: nofClusters, fNclusters ="<<nofClusters<<","<<fNclusters<<endl;
1056
1057 Int_t fNofMaps = fSegmentation->Npz();
1058 Int_t fNofAnodes = fNofMaps/2;
1059 Int_t dummy=0;
1060 Double_t fTimeStep = fSegmentation->Dpx(dummy);
1061 Double_t fSddLength = fSegmentation->Dx();
1062 Double_t fDriftSpeed = fResponse->DriftSpeed();
1063 Double_t anodePitch = fSegmentation->Dpz(dummy);
1064 Float_t n, baseline;
1065 fResponse->GetNoiseParam(n,baseline);
1066 Float_t dzz_1A = anodePitch * anodePitch / 12;
1067
1068 // fill Map of signals
1069 fMap->FillMap();
1070
1071 Int_t j,i,ii,ianode,anode,itime;
1072 Int_t wing,astart,astop,tstart,tstop,nanode;
1073 Double_t fadc,ClusterTime;
1074 Double_t q[400],x[400],z[400]; // digit charges and coordinates
1075
1076 for(j=0; j<nofClusters; j++) {
1077
1078 AliITSRawClusterSDD *clusterJ = (AliITSRawClusterSDD*) fClusters->At(j);
1079
1080 Int_t ndigits = 0;
1081 astart=clusterJ->Astart();
1082 astop=clusterJ->Astop();
1083 tstart=clusterJ->Tstartf();
1084 tstop=clusterJ->Tstopf();
1085 nanode=clusterJ->Anodes(); // <- Ernesto
1086 wing=(Int_t)clusterJ->W();
1087 if(wing == 2) {
1088 astart += fNofAnodes;
1089 astop += fNofAnodes;
1090 }
1091
1092// cout<<"astart,astop,tstart,tstop ="<<astart<<","<<astop<<","<<tstart<<","<<tstop<<endl;
1093
1094 // clear the digit arrays
1095 for(ii=0; ii<400; ii++) {
1096 q[ii] = 0.;
1097 x[ii] = 0.;
1098 z[ii] = 0.;
1099 }
1100
1101 for(ianode=astart; ianode<=astop; ianode++) {
1102 for(itime=tstart; itime<=tstop; itime++) {
1103 fadc=fMap->GetSignal(ianode,itime);
1104 if(fadc>baseline) {
1105 fadc-=(Double_t)baseline;
1106 q[ndigits] = fadc*(fTimeStep/160); // KeV
1107 anode = ianode;
1108 if(wing == 2) anode -= fNofAnodes;
1109 z[ndigits] = (anode + 0.5 - fNofAnodes/2)*anodePitch;
1110 ClusterTime = itime*fTimeStep;
1111 if(ClusterTime > fTimeCorr) ClusterTime -= fTimeCorr; // ns
1112 x[ndigits] = fSddLength - ClusterTime*fDriftSpeed;
1113 if(wing == 1) x[ndigits] *= (-1);
1114// cout<<"ianode,itime,fadc ="<<ianode<<","<<itime<<","<<fadc<<endl;
1115// cout<<"wing,anode,ndigits,charge ="<<wing<<","<<anode<<","<<ndigits<<","<<q[ndigits]<<endl;
1116 ndigits++;
1117 continue;
1118 }
1119 fadc=0;
1120 // cout<<"fadc=0, ndigits ="<<ndigits<<endl;
1121 } // time loop
1122 } // anode loop
1123 // cout<<"for new cluster ndigits ="<<ndigits<<endl;
1124
1125
1126 // Fit cluster to resolve for two separate ones --------------------
1127
1128 Double_t qq=0., xm=0., zm=0., xx=0., zz=0., xz=0.;
1129 Double_t dxx=0., dzz=0., dxz=0.;
1130 Double_t scl = 0., tmp, tga, elps = -1.;
1131 Double_t xfit[2], zfit[2], qfit[2];
1132 Double_t pitchz = anodePitch*1.e-4; // cm
1133 Double_t pitchx = fTimeStep*fDriftSpeed*1.e-4; // cm
1134 Double_t sigma2;
1135 Int_t nfhits;
1136 Int_t nbins = ndigits;
1137 Int_t separate = 0;
1138
1139 // now, all lengths are in microns
1140
1141 for (ii=0; ii<nbins; ii++) {
1142 qq += q[ii];
1143 xm += x[ii]*q[ii];
1144 zm += z[ii]*q[ii];
1145 xx += x[ii]*x[ii]*q[ii];
1146 zz += z[ii]*z[ii]*q[ii];
1147 xz += x[ii]*z[ii]*q[ii];
1148 }
1149
1150 xm /= qq;
1151 zm /= qq;
1152 xx /= qq;
1153 zz /= qq;
1154 xz /= qq;
1155
1156 dxx = xx - xm*xm;
1157 dzz = zz - zm*zm;
1158 dxz = xz - xm*zm;
1159
1160 // shrink the cluster in the time direction proportionaly to the
1161 // dxx/dzz, which lineary depends from the drift path
1162
1163 // new Ernesto........
1164 if( nanode == 1 )
1165 {
1166 dzz = dzz_1A; // for one anode cluster dzz = anode**2/12
1167 scl = TMath::Sqrt( 7.2/(-0.57*xm*1.e-3+71.8) );
1168 }
1169 if( nanode == 2 )
1170 {
1171 scl = TMath::Sqrt( (-0.18*xm*1.e-3+21.3)/(-0.57*xm*1.e-3+71.8) );
1172 }
1173
1174 if( nanode == 3 )
1175 {
1176 scl = TMath::Sqrt( (-0.5*xm*1.e-3+34.5)/(-0.57*xm*1.e-3+71.8) );
1177 }
1178
1179 if( nanode > 3 )
1180 {
1181 scl = TMath::Sqrt( (1.3*xm*1.e-3+49.)/(-0.57*xm*1.e-3+71.8) );
1182 }
1183
1184 // cout<<"1 microns: zm,dzz,xm,dxx,dxz,qq ="<<zm<<","<<dzz<<","<<xm<<","<<dxx<<","<<dxz<<","<<qq<<endl;
1185
1186 // old Boris.........
1187 // tmp=29730. - 585.*fabs(xm/1000.);
1188 // scl=TMath::Sqrt(tmp/130000.);
1189
1190 xm *= scl;
1191 xx *= scl*scl;
1192 xz *= scl;
1193
1194
1195 dxx = xx - xm*xm;
1196// dzz = zz - zm*zm;
1197 dxz = xz - xm*zm;
1198
1199 // cout<<"microns: zm,dzz,xm,dxx,xz,dxz,qq ="<<zm<<","<<dzz<<","<<xm<<","<<dxx<<","<<xz<<","<<dxz<<","<<qq<<endl;
1200
1201// if(dzz < 7200.) dzz = 7200.; // for one anode cluster dzz = anode**2/12
1202
1203 if (dxx < 0.) dxx=0.;
1204
1205 // the data if no cluster overlapping (the coordunates are in cm)
1206 nfhits = 1;
1207 xfit[0] = xm*1.e-4;
1208 zfit[0] = zm*1.e-4;
1209 qfit[0] = qq;
1210
1211// if(nbins < 7) cout<<"**** nbins ="<<nbins<<endl;
1212
1213 if (nbins >= 7) {
1214 if (dxz==0.) tga=0.;
1215 else {
1216 tmp=0.5*(dzz-dxx)/dxz;
1217 tga = (dxz<0.) ? tmp-TMath::Sqrt(tmp*tmp+1) : tmp+TMath::Sqrt(tmp*tmp+1);
1218 }
1219 elps=(tga*tga*dxx-2*tga*dxz+dzz)/(dxx+2*tga*dxz+tga*tga*dzz);
1220
1221 // change from microns to cm
1222 xm *= 1.e-4;
1223 zm *= 1.e-4;
1224 zz *= 1.e-8;
1225 xx *= 1.e-8;
1226 xz *= 1.e-8;
1227 dxz *= 1.e-8;
1228 dxx *= 1.e-8;
1229 dzz *= 1.e-8;
1230
1231 // cout<<"cm: zm,dzz,xm,dxx,xz,dxz,qq ="<<zm<<","<<dzz<<","<<xm<<","<<dxx<<","<<xz<<","<<dxz<<","<<qq<<endl;
1232
1233 for (i=0; i<nbins; i++) {
1234 x[i] = x[i] *= scl;
1235 x[i] = x[i] *= 1.e-4;
1236 z[i] = z[i] *= 1.e-4;
1237 }
1238
1239 // cout<<"!!! elps ="<<elps<<endl;
1240
1241 if (elps < 0.3) { // try to separate hits
1242 separate = 1;
1243 tmp=atan(tga);
1244 Double_t cosa=cos(tmp),sina=sin(tmp);
1245 Double_t a1=0., x1=0., xxx=0.;
1246 for (i=0; i<nbins; i++) {
1247 tmp=x[i]*cosa + z[i]*sina;
1248 if (q[i] > a1) {
1249 a1=q[i];
1250 x1=tmp;
1251 }
1252 xxx += tmp*tmp*tmp*q[i];
1253 }
1254 xxx /= qq;
1255 Double_t z12=-sina*xm + cosa*zm;
1256 sigma2=(sina*sina*xx-2*cosa*sina*xz+cosa*cosa*zz) - z12*z12;
1257 xm=cosa*xm + sina*zm;
1258 xx=cosa*cosa*xx + 2*cosa*sina*xz + sina*sina*zz;
1259 Double_t x2=(xx - xm*x1 - sigma2)/(xm - x1);
1260 Double_t r=a1*2*TMath::ACos(-1.)*sigma2/(qq*pitchx*pitchz);
1261 for (i=0; i<33; i++) { // solve a system of equations
1262 Double_t x1_old=x1, x2_old=x2, r_old=r;
1263 Double_t c11=x1-x2;
1264 Double_t c12=r;
1265 Double_t c13=1-r;
1266 Double_t c21=x1*x1 - x2*x2;
1267 Double_t c22=2*r*x1;
1268 Double_t c23=2*(1-r)*x2;
1269 Double_t c31=3*sigma2*(x1-x2) + x1*x1*x1 - x2*x2*x2;
1270 Double_t c32=3*r*(sigma2 + x1*x1);
1271 Double_t c33=3*(1-r)*(sigma2 + x2*x2);
1272 Double_t f1=-(r*x1 + (1-r)*x2 - xm);
1273 Double_t f2=-(r*(sigma2 + x1*x1) + (1-r)*(sigma2 + x2*x2) - xx);
1274 Double_t f3=-(r*x1*(3*sigma2+x1*x1) + (1-r)*x2*(3*sigma2+x2*x2)-xxx);
1275 Double_t d=c11*c22*c33 + c21*c32*c13 + c12*c23*c31 - c31*c22*c13 - c21*c12*c33 - c32*c23*c11;
1276 if (d==0.) {
1277 cout<<"*********** d=0 ***********\n";
1278 break;
1279 }
1280 Double_t dr=f1*c22*c33 + f2*c32*c13 + c12*c23*f3 -
1281 f3*c22*c13 - f2*c12*c33 - c32*c23*f1;
1282 Double_t d1=c11*f2*c33 + c21*f3*c13 + f1*c23*c31 -
1283 c31*f2*c13 - c21*f1*c33 - f3*c23*c11;
1284 Double_t d2=c11*c22*f3 + c21*c32*f1 + c12*f2*c31 -
1285 c31*c22*f1 - c21*c12*f3 - c32*f2*c11;
1286 r += dr/d;
1287 x1 += d1/d;
1288 x2 += d2/d;
1289
1290 if (fabs(x1-x1_old) > 0.0001) continue;
1291 if (fabs(x2-x2_old) > 0.0001) continue;
1292 if (fabs(r-r_old)/5 > 0.001) continue;
1293
1294 a1=r*qq*pitchx*pitchz/(2*TMath::ACos(-1.)*sigma2);
1295 Double_t a2=a1*(1-r)/r;
1296 qfit[0]=a1; xfit[0]=x1*cosa - z12*sina; zfit[0]=x1*sina + z12*cosa;
1297 qfit[1]=a2; xfit[1]=x2*cosa - z12*sina; zfit[1]=x2*sina + z12*cosa;
1298 nfhits=2;
1299 break; // Ok !
1300 }
1301 if (i==33) cerr<<"No more iterations ! "<<endl;
1302 } // end of attempt to separate overlapped clusters
1303 } // end of nbins cut
1304
1305 if(elps < 0.) cout<<" elps=-1 ="<<elps<<endl;
1306 if(elps >0. && elps< 0.3 && nfhits == 1) cout<<" small elps, nfh=1 ="<<elps<<","<<nfhits<<endl;
1307 if(nfhits == 2) cout<<" nfhits=2 ="<<nfhits<<endl;
1308
1309 for (i=0; i<nfhits; i++) {
1310 xfit[i] *= (1.e+4/scl);
1311 if(wing == 1) xfit[i] *= (-1);
1312 zfit[i] *= 1.e+4;
1313 // cout<<" --------- i,xfiti,zfiti,qfiti ="<<i<<","<<xfit[i]<<","<<zfit[i]<<","<<qfit[i]<<endl;
1314 }
1315
1316 Int_t ncl = nfhits;
1317 if(nfhits == 1 && separate == 1) {
1318 cout<<"!!!!! no separate"<<endl;
1319 ncl = -2;
1320 }
1321
1322 if(nfhits == 2) {
1323 cout << "Split cluster: " << endl;
1324 clusterJ->PrintInfo();
1325 cout << " in: " << endl;
1326 for (i=0; i<nfhits; i++) {
1327
1328 // AliITSRawClusterSDD *clust = new AliITSRawClusterSDD(wing,-1,-1,(Float_t)qfit[i],ncl,0,0,(Float_t)xfit[i],(Float_t)zfit[i],0,0,0,0,tstart,tstop,astart,astop);
1329 // AliITSRawClusterSDD *clust = new AliITSRawClusterSDD(wing,-1,-1,(Float_t)qfit[i],0,0,0,(Float_t)xfit[i],(Float_t)zfit[i],0,0,0,0,tstart,tstop,astart,astop,ncl);
1330
1331 // ???????????
1332 // if(wing == 1) xfit[i] *= (-1);
1333 Float_t Anode = (zfit[i]/anodePitch+fNofAnodes/2-0.5);
1334 Float_t Time = (fSddLength - xfit[i])/fDriftSpeed;
1335 Float_t clusterPeakAmplitude = clusterJ->PeakAmpl();
1336 Float_t peakpos = clusterJ->PeakPos();
1337
1338 Float_t clusteranodePath = (Anode - fNofAnodes/2)*anodePitch;
1339 Float_t clusterDriftPath = Time*fDriftSpeed;
1340 clusterDriftPath = fSddLength-clusterDriftPath;
1341
1342 AliITSRawClusterSDD *clust = new AliITSRawClusterSDD(wing,Anode,Time,qfit[i],
1343 clusterPeakAmplitude,peakpos,0.,0.,clusterDriftPath,clusteranodePath,clusterJ->Samples()/2
1344 ,tstart,tstop,0,0,0,astart,astop);
1345 clust->PrintInfo();
1346 iTS->AddCluster(1,clust);
1347 // cout<<"new cluster added: tstart,tstop,astart,astop,x,ncl ="<<tstart<<","<<tstop<<","<<astart<<","<<astop<<","<<xfit[i]<<","<<ncl<<endl;
1348 delete clust;
1349 }// nfhits loop
1350 fClusters->RemoveAt(j);
1351
1352 } // if nfhits = 2
1353 } // cluster loop
1354
1355 fClusters->Compress();
1356 fMap->ClearMap();
24a1c341 1357*/
a1f090e0 1358 return;
1359}
1360
1361
b0f5e3fc 1362//_____________________________________________________________________________
1363
1364void AliITSClusterFinderSDD::GetRecPoints()
1365{
1366 // get rec points
b0f5e3fc 1367
1368 AliITS *iTS=(AliITS*)gAlice->GetModule("ITS");
1369
1370 // get number of clusters for this module
1371 Int_t nofClusters = fClusters->GetEntriesFast();
1372 nofClusters -= fNclusters;
1373
b0f5e3fc 1374 const Float_t kconvGeV = 1.e-6; // GeV -> KeV
1375 const Float_t kconv = 1.0e-4;
1376 const Float_t kRMSx = 38.0*kconv; // microns->cm ITS TDR Table 1.3
1377 const Float_t kRMSz = 28.0*kconv; // microns->cm ITS TDR Table 1.3
1378
e8189707 1379
78a228db 1380 Int_t i;
1381 Int_t ix, iz, idx=-1;
1382 AliITSdigitSDD *dig=0;
78a228db 1383 Int_t ndigits=fDigits->GetEntriesFast();
b0f5e3fc 1384 for(i=0; i<nofClusters; i++) {
78a228db 1385 AliITSRawClusterSDD *clusterI = (AliITSRawClusterSDD*)fClusters->At(i);
1386 if(!clusterI) Error("SDD: GetRecPoints","i clusterI ",i,clusterI);
1387 if(clusterI) idx=clusterI->PeakPos();
1388 if(idx>ndigits) Error("SDD: GetRecPoints","idx ndigits",idx,ndigits);
1389 // try peak neighbours - to be done
1390 if(idx && idx <= ndigits) dig = (AliITSdigitSDD*)fDigits->UncheckedAt(idx);
1391 if(!dig) {
1392 // try cog
1393 fSegmentation->GetPadIxz(clusterI->X(),clusterI->Z(),ix,iz);
1394 dig = (AliITSdigitSDD*)fMap->GetHit(iz-1,ix-1);
1395 // if null try neighbours
1396 if (!dig) dig = (AliITSdigitSDD*)fMap->GetHit(iz-1,ix);
1397 if (!dig) dig = (AliITSdigitSDD*)fMap->GetHit(iz-1,ix+1);
1398 if (!dig) printf("SDD: cannot assign the track number!\n");
1399 }
1400
b0f5e3fc 1401 AliITSRecPoint rnew;
1402 rnew.SetX(clusterI->X());
1403 rnew.SetZ(clusterI->Z());
1404 rnew.SetQ(clusterI->Q()); // in KeV - should be ADC
b0f5e3fc 1405 rnew.SetdEdX(kconvGeV*clusterI->Q());
1406 rnew.SetSigmaX2(kRMSx*kRMSx);
1407 rnew.SetSigmaZ2(kRMSz*kRMSz);
78a228db 1408 if(dig) rnew.fTracks[0]=dig->fTracks[0];
1409 if(dig) rnew.fTracks[1]=dig->fTracks[1];
1410 if(dig) rnew.fTracks[2]=dig->fTracks[2];
1411 //printf("SDD: i %d track1 track2 track3 %d %d %d x y %f %f\n",i,rnew.fTracks[0],rnew.fTracks[1],rnew.fTracks[2],clusterI->X(),clusterI->Z());
b0f5e3fc 1412 iTS->AddRecPoint(rnew);
b0f5e3fc 1413 } // I clusters
b0f5e3fc 1414
e8189707 1415 fMap->ClearMap();
b0f5e3fc 1416}
1417
1418//_____________________________________________________________________________
1419
ebf6f0ee 1420void AliITSClusterFinderSDD::FindRawClusters(Int_t mod)
b0f5e3fc 1421{
1422 // find raw clusters
a1f090e0 1423 Find1DClustersE();
b0f5e3fc 1424 GroupClusters();
1425 SelectClusters();
a1f090e0 1426 ResolveClustersE();
b0f5e3fc 1427 GetRecPoints();
1428}
a1f090e0 1429//_____________________________________________________________________________
1430
1431void AliITSClusterFinderSDD::Print()
1432{
1433 // Print SDD cluster finder Parameters
1434
1435 cout << "**************************************************" << endl;
1436 cout << " Silicon Drift Detector Cluster Finder Parameters " << endl;
1437 cout << "**************************************************" << endl;
1438 cout << "Number of Clusters: " << fNclusters << endl;
1439 cout << "Anode Tolerance: " << fDAnode << endl;
1440 cout << "Time Tolerance: " << fDTime << endl;
1441 cout << "Time correction (electronics): " << fTimeCorr << endl;
1442 cout << "Cut Amplitude (threshold): " << fCutAmplitude << endl;
1443 cout << "Minimum Amplitude: " << fMinPeak << endl;
1444 cout << "Minimum Charge: " << fMinCharge << endl;
1445 cout << "Minimum number of cells/clusters: " << fMinNCells << endl;
1446 cout << "Maximum number of cells/clusters: " << fMaxNCells << endl;
1447 cout << "**************************************************" << endl;
1448}