Update SDD response parameters
[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 **************************************************************************/
15
78a228db 16#include <TFile.h>
b0f5e3fc 17
18#include "AliITSClusterFinderSDD.h"
e8189707 19#include "AliITSMapA1.h"
20#include "AliITS.h"
78a228db 21#include "AliITSdigit.h"
22#include "AliITSRawCluster.h"
23#include "AliITSRecPoint.h"
24#include "AliITSsegmentation.h"
25#include "AliITSresponse.h"
b0f5e3fc 26#include "AliRun.h"
27
28
29
30ClassImp(AliITSClusterFinderSDD)
31
32//----------------------------------------------------------
33AliITSClusterFinderSDD::AliITSClusterFinderSDD
34(AliITSsegmentation *seg, AliITSresponse *response, TClonesArray *digits, TClonesArray *recp)
35{
36 // constructor
78a228db 37
b0f5e3fc 38 fSegmentation=seg;
39 fResponse=response;
40 fDigits=digits;
41 fClusters=recp;
42 fNclusters= fClusters->GetEntriesFast();
b0f5e3fc 43 SetCutAmplitude();
44 SetDAnode();
45 SetDTime();
b0f5e3fc 46 SetMinPeak();
78a228db 47 SetMinNCells();
48 SetMaxNCells();
49 SetTimeCorr();
50 fMap=new AliITSMapA1(fSegmentation,fDigits,fCutAmplitude);
51
b0f5e3fc 52}
53
54//_____________________________________________________________________________
55AliITSClusterFinderSDD::AliITSClusterFinderSDD()
56{
57 // constructor
58 fSegmentation=0;
59 fResponse=0;
60 fDigits=0;
61 fClusters=0;
62 fNclusters=0;
e8189707 63 fMap=0;
b0f5e3fc 64 SetCutAmplitude();
65 SetDAnode();
66 SetDTime();
b0f5e3fc 67 SetMinPeak();
78a228db 68 SetMinNCells();
69 SetMaxNCells();
70 SetTimeCorr();
b0f5e3fc 71
72}
73
e8189707 74//_____________________________________________________________________________
75AliITSClusterFinderSDD::~AliITSClusterFinderSDD()
76{
77 // destructor
78
79 if(fMap) delete fMap;
e8189707 80
81}
b0f5e3fc 82//__________________________________________________________________________
83AliITSClusterFinderSDD::AliITSClusterFinderSDD(const AliITSClusterFinderSDD &source){
84 // Copy Constructor
85 if(&source == this) return;
86 this->fClusters = source.fClusters ;
87 this->fNclusters = source.fNclusters ;
88 this->fMap = source.fMap ;
89 this->fCutAmplitude = source.fCutAmplitude ;
90 this->fDAnode = source.fDAnode ;
91 this->fDTime = source.fDTime ;
78a228db 92 this->fTimeCorr = source.fTimeCorr ;
b0f5e3fc 93 this->fMinPeak = source.fMinPeak ;
94 this->fMinNCells = source.fMinNCells ;
78a228db 95 this->fMaxNCells = source.fMaxNCells ;
b0f5e3fc 96 return;
97}
98
99//_________________________________________________________________________
100AliITSClusterFinderSDD&
101 AliITSClusterFinderSDD::operator=(const AliITSClusterFinderSDD &source) {
102 // Assignment operator
103 if(&source == this) return *this;
104 this->fClusters = source.fClusters ;
105 this->fNclusters = source.fNclusters ;
106 this->fMap = source.fMap ;
107 this->fCutAmplitude = source.fCutAmplitude ;
108 this->fDAnode = source.fDAnode ;
109 this->fDTime = source.fDTime ;
78a228db 110 this->fTimeCorr = source.fTimeCorr ;
b0f5e3fc 111 this->fMinPeak = source.fMinPeak ;
112 this->fMinNCells = source.fMinNCells ;
78a228db 113 this->fMaxNCells = source.fMaxNCells ;
b0f5e3fc 114 return *this;
115}
116
b0f5e3fc 117
b0f5e3fc 118//_____________________________________________________________________________
119
120void AliITSClusterFinderSDD::Find1DClusters()
121{
122 // find 1D clusters
123
124 AliITS *iTS=(AliITS*)gAlice->GetModule("ITS");
125
126 // retrieve the parameters
127 Int_t fNofMaps = fSegmentation->Npz();
128 Int_t fMaxNofSamples = fSegmentation->Npx();
129 Int_t fNofAnodes = fNofMaps/2;
130 Int_t dummy=0;
131 Float_t fTimeStep = fSegmentation->Dpx(dummy);
132 Float_t fSddLength = fSegmentation->Dx();
133 Float_t fDriftSpeed = fResponse->DriftSpeed();
134
135 Float_t anodePitch = fSegmentation->Dpz(dummy);
136 // map the signal
78a228db 137 fMap->SetThreshold(fCutAmplitude);
138 fMap->FillMap();
139
78a228db 140 Float_t maxadc = fResponse->MaxAdc();
141 Float_t topValue = fResponse->MagicValue();
142 Float_t norm = maxadc/topValue;
143
144 Int_t nofFoundClusters = 0;
145 Int_t i;
146 Float_t **dfadc = new Float_t*[fNofAnodes];
147 for(i=0;i<fNofAnodes;i++) dfadc[i] = new Float_t[fMaxNofSamples];
063150f2 148 Float_t fadc = 0.;
149 Float_t fadc1 = 0.;
150 Float_t fadc2 = 0.;
78a228db 151 Int_t j,k,idx,l,m;
152 for(j=0;j<2;j++) {
153 for(k=0;k<fNofAnodes;k++) {
154 idx = j*fNofAnodes+k;
155 // signal (fadc) & derivative (dfadc)
65d4384f 156 dfadc[k][255]=0.;
78a228db 157 for(l=0; l<fMaxNofSamples; l++) {
158 fadc2=(Float_t)fMap->GetSignal(idx,l);
159 if(l>0) fadc1=(Float_t)fMap->GetSignal(idx,l-1);
160 if(l>0) dfadc[k][l-1] = fadc2-fadc1;
161 } // samples
162 } // anodes
b0f5e3fc 163
78a228db 164 for(k=0;k<fNofAnodes;k++) {
165 //cout << "Anode: " << k+1 << ", Wing: " << j+1 << endl;
166 idx = j*fNofAnodes+k;
b0f5e3fc 167
78a228db 168 Int_t imax = 0;
169 Int_t imaxd = 0;
170 Int_t it=0;
171 while(it <= fMaxNofSamples-3) {
b0f5e3fc 172
78a228db 173 imax = it;
174 imaxd = it;
175 // maximum of signal
b0f5e3fc 176
78a228db 177 Float_t fadcmax = 0.;
178 Float_t dfadcmax = 0.;
179 Int_t lthrmina = 1;
180 // if(it >= 60) lthrmina = 2;
181 // if(it >= 100) lthrmina = 3;
182 Int_t lthrmint = 2;
183 //if(it >= 60) lthrmint = 3;
184 //if(it >= 100) lthrmint = 4;
185
186 Int_t lthra = 1;
187 Int_t lthrt = 0;
b0f5e3fc 188
78a228db 189 for(m=0;m<20;m++) {
190 Int_t id = it+m;
191 if(id>=fMaxNofSamples) break;
192 fadc=(float)fMap->GetSignal(idx,id);
193 if(fadc > fadcmax) { fadcmax = fadc; imax = id;}
194 if(fadc > (float)fCutAmplitude) {
195 lthrt++;
196 }
197
198 if(dfadc[k][id] > dfadcmax) {
199 dfadcmax = dfadc[k][id];
200 imaxd = id;
201 }
202 }
203 it = imaxd;
b0f5e3fc 204
78a228db 205 if(fMap->TestHit(idx,imax) == kEmpty) {it++; continue;}
206
207 // cluster charge
208 Int_t tstart = it-1;
e3d05a9c 209 if( tstart<0 ) tstart = 0;
b0f5e3fc 210
78a228db 211 Bool_t ilcl = 0;
212 if(lthrt >= lthrmint && lthra >= lthrmina) ilcl = 1;
213 //printf("ilcl %d\n",ilcl);
214
78a228db 215 if(ilcl) {
216 nofFoundClusters++;
217 Int_t tstop = tstart;
218 Float_t dfadcmin = 10000.;
219 Int_t ij;
220 for(ij=0; ij<20; ij++) {
221 if(dfadc[k][it+ij] < dfadcmin) {
222 tstop = it+ij+1;
223 dfadcmin = dfadc[k][it+ij];
224 }
225 }
226
227 Float_t clusterCharge = 0.;
228 Float_t clusterAnode = k+0.5;
229 Float_t clusterTime = 0.;
230 Float_t clusterMult = 0.;
231 Float_t clusterPeakAmplitude = 0.;
232 Int_t its,peakpos=-1;
233 Float_t n, baseline;
234 fResponse->GetNoiseParam(n,baseline);
210bc185 235 n *= norm;
236 baseline *= norm;
78a228db 237 for(its=tstart; its<=tstop; its++) {
238 fadc=(float)fMap->GetSignal(idx,its);
239 if(fadc>baseline)
240 fadc-=baseline;
241 else
242 fadc=0.;
243 clusterCharge += fadc;
244 // as a matter of fact we should take the peak pos before FFT
245 // to get the list of tracks !!!
246 if(fadc > clusterPeakAmplitude) {
247 clusterPeakAmplitude = fadc;
248 //peakpos=fMap->GetHitIndex(idx,its);
249 Int_t shift=(int)(fTimeCorr/fTimeStep);
250 if(its>shift && its<(fMaxNofSamples-shift)) peakpos=fMap->GetHitIndex(idx,its+shift);
251 else peakpos=fMap->GetHitIndex(idx,its);
252 if(peakpos<0) peakpos=fMap->GetHitIndex(idx,its);
253 }
254 clusterTime += fadc*its;
255 clusterMult++;
256 if(its == tstop) {
257 // charge from ADC back to nA
063150f2 258 //clusterCharge /= norm;
78a228db 259 if(clusterCharge <= 0.) printf("clusterCharge %f norm %f\n",clusterCharge,norm);
b0f5e3fc 260 clusterTime /= (clusterCharge/fTimeStep); // ns
261 clusterCharge *= (fTimeStep/160.); // keV
78a228db 262 if(clusterTime > fTimeCorr) clusterTime -= fTimeCorr; // ns
263 }
264 }
265 // cout << "Anode: " << k << ", tstart: " << tstart << ", tstop: " << tstop << ", Charge: " << clusterCharge << endl;
266
267 Float_t clusteranodePath = (clusterAnode - fNofAnodes/2)*anodePitch;
268 Float_t clusterDriftPath = clusterTime*fDriftSpeed;
063150f2 269 if(TMath::Abs(clusterDriftPath) > fSddLength) {
270 Warning("AliITSClusterFinderSDD","Cluster drift path %f bigger then the detector size - please parametrise the time correction as a function of the drift time!",clusterDriftPath);
271 }
78a228db 272 clusterDriftPath = fSddLength-clusterDriftPath;
273
274 if(clusterCharge <= 0.) break;
275
210bc185 276 AliITSRawClusterSDD clust(j+1,clusterAnode,clusterTime,clusterCharge,clusterPeakAmplitude,peakpos,0.,0.,clusterDriftPath,clusteranodePath,clusterMult);
277 iTS->AddCluster(1,&clust);
78a228db 278 it = tstop;
b0f5e3fc 279 } // ilcl
280
281 it++;
282
283 } // while (samples)
284 } // anodes
285 } // detectors (2)
286
b0f5e3fc 287
78a228db 288 //fMap->ClearMap();
44b3710f 289
78a228db 290 for(i=0;i<fNofAnodes;i++) delete[] dfadc[i];
44b3710f 291 delete [] dfadc;
b0f5e3fc 292
293 return;
294
295}
296
297//_____________________________________________________________________________
298void AliITSClusterFinderSDD::GroupClusters()
299{
300 // group clusters
301 Int_t dummy=0;
302 Float_t fTimeStep = fSegmentation->Dpx(dummy);
303
304
305 // get number of clusters for this module
306 Int_t nofClusters = fClusters->GetEntriesFast();
307 nofClusters -= fNclusters;
308
b0f5e3fc 309 AliITSRawClusterSDD *clusterI;
310 AliITSRawClusterSDD *clusterJ;
311
44b3710f 312 Int_t *label = new Int_t [nofClusters];
b0f5e3fc 313 Int_t i,j;
314 for(i=0; i<nofClusters; i++) label[i] = 0;
315 for(i=0; i<nofClusters; i++) {
316 if(label[i] != 0) continue;
317 for(j=i+1; j<nofClusters; j++) {
318 if(label[j] != 0) continue;
319 clusterI = (AliITSRawClusterSDD*) fClusters->At(i);
320 clusterJ = (AliITSRawClusterSDD*) fClusters->At(j);
321 // 1.3 good
322 if(clusterI->T() < fTimeStep*60) fDAnode = 3.2;
323 if(clusterI->T() < fTimeStep*10) fDAnode = 1.2;
324 Bool_t pair = clusterI->Brother(clusterJ,fDAnode,fDTime);
325 if(!pair) continue;
e8189707 326 // clusterI->PrintInfo();
327 // clusterJ->PrintInfo();
b0f5e3fc 328 clusterI->Add(clusterJ);
329 label[j] = 1;
330 fClusters->RemoveAt(j);
331 } // J clusters
332 label[i] = 1;
333 } // I clusters
334 fClusters->Compress();
44b3710f 335
336 delete [] label;
b0f5e3fc 337 return;
338
339}
340
341//_____________________________________________________________________________
342
343void AliITSClusterFinderSDD::SelectClusters()
344{
345 // get number of clusters for this module
346 Int_t nofClusters = fClusters->GetEntriesFast();
347 nofClusters -= fNclusters;
348
b0f5e3fc 349 Int_t i;
350 for(i=0; i<nofClusters; i++) {
351 AliITSRawClusterSDD *clusterI = (AliITSRawClusterSDD*) fClusters->At(i);
352 Int_t rmflg = 0;
353 Float_t wy = 0.;
354 if(clusterI->Anodes() != 0.) {
355 wy = ((Float_t) clusterI->Samples())/clusterI->Anodes();
356 }
357 Float_t amp = clusterI->PeakAmpl();
358 if(amp < fMinPeak) rmflg = 1;
359 if(wy < fMinNCells) rmflg = 1;
78a228db 360 //if(wy > fMaxNCells) rmflg = 1;
b0f5e3fc 361 if(rmflg) fClusters->RemoveAt(i);
362 } // I clusters
363 fClusters->Compress();
364 return;
365
366}
367
368//_____________________________________________________________________________
369
370void AliITSClusterFinderSDD::GetRecPoints()
371{
372 // get rec points
b0f5e3fc 373
374 AliITS *iTS=(AliITS*)gAlice->GetModule("ITS");
375
376 // get number of clusters for this module
377 Int_t nofClusters = fClusters->GetEntriesFast();
378 nofClusters -= fNclusters;
379
b0f5e3fc 380 const Float_t kconvGeV = 1.e-6; // GeV -> KeV
381 const Float_t kconv = 1.0e-4;
382 const Float_t kRMSx = 38.0*kconv; // microns->cm ITS TDR Table 1.3
383 const Float_t kRMSz = 28.0*kconv; // microns->cm ITS TDR Table 1.3
384
e8189707 385
78a228db 386 Int_t i;
387 Int_t ix, iz, idx=-1;
388 AliITSdigitSDD *dig=0;
063150f2 389 //Int_t maxt=fSegmentation->Npx();
78a228db 390 Int_t ndigits=fDigits->GetEntriesFast();
b0f5e3fc 391 for(i=0; i<nofClusters; i++) {
78a228db 392 AliITSRawClusterSDD *clusterI = (AliITSRawClusterSDD*)fClusters->At(i);
393 if(!clusterI) Error("SDD: GetRecPoints","i clusterI ",i,clusterI);
394 if(clusterI) idx=clusterI->PeakPos();
395 if(idx>ndigits) Error("SDD: GetRecPoints","idx ndigits",idx,ndigits);
396 // try peak neighbours - to be done
397 if(idx && idx <= ndigits) dig = (AliITSdigitSDD*)fDigits->UncheckedAt(idx);
398 if(!dig) {
399 // try cog
400 fSegmentation->GetPadIxz(clusterI->X(),clusterI->Z(),ix,iz);
401 dig = (AliITSdigitSDD*)fMap->GetHit(iz-1,ix-1);
402 // if null try neighbours
403 if (!dig) dig = (AliITSdigitSDD*)fMap->GetHit(iz-1,ix);
404 if (!dig) dig = (AliITSdigitSDD*)fMap->GetHit(iz-1,ix+1);
405 if (!dig) printf("SDD: cannot assign the track number!\n");
406 }
407
b0f5e3fc 408 AliITSRecPoint rnew;
409 rnew.SetX(clusterI->X());
410 rnew.SetZ(clusterI->Z());
411 rnew.SetQ(clusterI->Q()); // in KeV - should be ADC
b0f5e3fc 412 rnew.SetdEdX(kconvGeV*clusterI->Q());
413 rnew.SetSigmaX2(kRMSx*kRMSx);
414 rnew.SetSigmaZ2(kRMSz*kRMSz);
78a228db 415 if(dig) rnew.fTracks[0]=dig->fTracks[0];
416 if(dig) rnew.fTracks[1]=dig->fTracks[1];
417 if(dig) rnew.fTracks[2]=dig->fTracks[2];
418 //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 419 iTS->AddRecPoint(rnew);
b0f5e3fc 420 } // I clusters
b0f5e3fc 421
e8189707 422 fMap->ClearMap();
b0f5e3fc 423}
424
425//_____________________________________________________________________________
426
427void AliITSClusterFinderSDD::FindRawClusters()
428{
429 // find raw clusters
430 Find1DClusters();
431 GroupClusters();
432 SelectClusters();
433 GetRecPoints();
434}