Classes moved to STEERBase.
[u/mrichter/AliRoot.git] / TRD / AliTRDclusterizerV1.cxx
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cb86ff6e 1
f7336fa3 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
88cb7938 17/* $Id$ */
f7336fa3 18
19///////////////////////////////////////////////////////////////////////////////
20// //
6d50f529 21// TRD cluster finder //
f7336fa3 22// //
23///////////////////////////////////////////////////////////////////////////////
24
25#include <TF1.h>
94de3818 26#include <TTree.h>
793ff80c 27#include <TH1.h>
a819a5f7 28#include <TFile.h>
f7336fa3 29
88cb7938 30#include "AliRunLoader.h"
31#include "AliLoader.h"
928e9fae 32#include "AliRawReader.h"
6d50f529 33#include "AliLog.h"
d74f970b 34#include "AliAlignObj.h"
793ff80c 35
f7336fa3 36#include "AliTRDclusterizerV1.h"
f7336fa3 37#include "AliTRDgeometry.h"
6f1e466d 38#include "AliTRDdataArrayF.h"
793ff80c 39#include "AliTRDdataArrayI.h"
40#include "AliTRDdigitsManager.h"
a5cadd36 41#include "AliTRDpadPlane.h"
928e9fae 42#include "AliTRDrawData.h"
3551db50 43#include "AliTRDcalibDB.h"
3becff3c 44#include "AliTRDSimParam.h"
3551db50 45#include "AliTRDRecParam.h"
c85a4951 46#include "AliTRDcluster.h"
f7336fa3 47
56178ff4 48#include "Cal/AliTRDCalROC.h"
49#include "Cal/AliTRDCalDet.h"
50
f7336fa3 51ClassImp(AliTRDclusterizerV1)
52
53//_____________________________________________________________________________
6d50f529 54AliTRDclusterizerV1::AliTRDclusterizerV1()
55 :AliTRDclusterizer()
56 ,fDigitsManager(NULL)
f7336fa3 57{
58 //
59 // AliTRDclusterizerV1 default constructor
60 //
61
f7336fa3 62}
63
64//_____________________________________________________________________________
a6dd11e9 65AliTRDclusterizerV1::AliTRDclusterizerV1(const Text_t *name, const Text_t *title)
6d50f529 66 :AliTRDclusterizer(name,title)
67 ,fDigitsManager(new AliTRDdigitsManager())
f7336fa3 68{
69 //
6d50f529 70 // AliTRDclusterizerV1 constructor
f7336fa3 71 //
72
17b26de4 73 fDigitsManager->CreateArrays();
f7336fa3 74
75}
76
77//_____________________________________________________________________________
dd9a6ee3 78AliTRDclusterizerV1::AliTRDclusterizerV1(const AliTRDclusterizerV1 &c)
6d50f529 79 :AliTRDclusterizer(c)
80 ,fDigitsManager(NULL)
8230f242 81{
82 //
83 // AliTRDclusterizerV1 copy constructor
84 //
85
8230f242 86}
87
88//_____________________________________________________________________________
f7336fa3 89AliTRDclusterizerV1::~AliTRDclusterizerV1()
90{
8230f242 91 //
92 // AliTRDclusterizerV1 destructor
93 //
f7336fa3 94
6f1e466d 95 if (fDigitsManager) {
96 delete fDigitsManager;
abaf1f1d 97 fDigitsManager = NULL;
f7336fa3 98 }
99
100}
101
102//_____________________________________________________________________________
dd9a6ee3 103AliTRDclusterizerV1 &AliTRDclusterizerV1::operator=(const AliTRDclusterizerV1 &c)
104{
105 //
106 // Assignment operator
107 //
108
109 if (this != &c) ((AliTRDclusterizerV1 &) c).Copy(*this);
110 return *this;
111
112}
113
114//_____________________________________________________________________________
e0d47c25 115void AliTRDclusterizerV1::Copy(TObject &c) const
8230f242 116{
117 //
118 // Copy function
119 //
120
17b26de4 121 ((AliTRDclusterizerV1 &) c).fDigitsManager = 0;
8230f242 122
123 AliTRDclusterizer::Copy(c);
124
125}
126
127//_____________________________________________________________________________
f7336fa3 128Bool_t AliTRDclusterizerV1::ReadDigits()
129{
130 //
131 // Reads the digits arrays from the input aliroot file
132 //
133
88cb7938 134 if (!fRunLoader) {
6d50f529 135 AliError("No run loader available");
f7336fa3 136 return kFALSE;
137 }
6d50f529 138
88cb7938 139 AliLoader* loader = fRunLoader->GetLoader("TRDLoader");
6d50f529 140 if (!loader->TreeD()) {
141 loader->LoadDigits();
142 }
abaf1f1d 143
f7336fa3 144 // Read in the digit arrays
88cb7938 145 return (fDigitsManager->ReadDigits(loader->TreeD()));
f7336fa3 146
147}
148
149//_____________________________________________________________________________
25ca55ce 150Bool_t AliTRDclusterizerV1::ReadDigits(TTree *digitsTree)
151{
152 //
153 // Reads the digits arrays from the input tree
154 //
155
156 // Read in the digit arrays
157 return (fDigitsManager->ReadDigits(digitsTree));
158
159}
160
161//_____________________________________________________________________________
a6dd11e9 162Bool_t AliTRDclusterizerV1::ReadDigits(AliRawReader *rawReader)
928e9fae 163{
164 //
165 // Reads the digits arrays from the ddl file
166 //
167
4ab68796 168 AliTRDrawData raw;
4ab68796 169 fDigitsManager = raw.Raw2Digits(rawReader);
928e9fae 170
171 return kTRUE;
172
173}
174
175//_____________________________________________________________________________
793ff80c 176Bool_t AliTRDclusterizerV1::MakeClusters()
f7336fa3 177{
178 //
179 // Generates the cluster.
180 //
181
6d50f529 182 Int_t row = 0;
183 Int_t col = 0;
184 Int_t time = 0;
185 Int_t icham = 0;
186 Int_t iplan = 0;
187 Int_t isect = 0;
188 Int_t iPad = 0;
189
190 AliTRDdataArrayI *digitsIn;
a6dd11e9 191 AliTRDdataArrayI *tracksIn;
f7336fa3 192
f162af62 193 AliTRDgeometry geo;
a6dd11e9 194
6d50f529 195 AliTRDcalibDB *calibration = AliTRDcalibDB::Instance();
196 if (!calibration) {
4fad09c9 197 AliFatal("No AliTRDcalibDB instance available\n");
3551db50 198 return kFALSE;
199 }
200
6d50f529 201 AliTRDSimParam *simParam = AliTRDSimParam::Instance();
202 if (!simParam) {
203 AliError("No AliTRDSimParam instance available\n");
3becff3c 204 return kFALSE;
205 }
206
6d50f529 207 AliTRDRecParam *recParam = AliTRDRecParam::Instance();
208 if (!recParam) {
209 AliError("No AliTRDRecParam instance available\n");
3551db50 210 return kFALSE;
211 }
f7336fa3 212
8ec071c8 213 // ADC thresholds
a6dd11e9 214 Float_t ADCthreshold = simParam->GetADCthreshold();
3e1a3ad8 215 // Threshold value for the maximum
a6dd11e9 216 Float_t maxThresh = recParam->GetClusMaxThresh();
3e1a3ad8 217 // Threshold value for the digit signal
a6dd11e9 218 Float_t sigThresh = recParam->GetClusSigThresh();
6d50f529 219
56178ff4 220 // Detector wise calibration object for t0
8ec071c8 221 const AliTRDCalDet *calT0Det = calibration->GetT0Det();
222 // Detector wise calibration object for the gain factors
223 const AliTRDCalDet *calGainFactorDet = calibration->GetGainFactorDet();
56178ff4 224
f7336fa3 225 // Iteration limit for unfolding procedure
8230f242 226 const Float_t kEpsilon = 0.01;
8230f242 227 const Int_t kNclus = 3;
228 const Int_t kNsig = 5;
a6dd11e9 229 const Int_t kNdict = AliTRDdigitsManager::kNDict;
230 const Int_t kNtrack = kNdict * kNclus;
3e1a3ad8 231
7ad19338 232 Int_t iUnfold = 0;
a5cadd36 233 Double_t ratioLeft = 1.0;
234 Double_t ratioRight = 1.0;
db30bf0f 235
a6dd11e9 236 Int_t iClusterROC = 0;
237
a5cadd36 238 Double_t padSignal[kNsig];
239 Double_t clusterSignal[kNclus];
240 Double_t clusterPads[kNclus];
f7336fa3 241
6d50f529 242 Int_t chamBeg = 0;
243 Int_t chamEnd = AliTRDgeometry::Ncham();
244 Int_t planBeg = 0;
245 Int_t planEnd = AliTRDgeometry::Nplan();
246 Int_t sectBeg = 0;
247 Int_t sectEnd = AliTRDgeometry::Nsect();
248 Int_t nTimeTotal = calibration->GetNumberOfTimeBins();
f7336fa3 249
6d50f529 250 AliDebug(1,Form("Number of Time Bins = %d.\n",nTimeTotal));
3becff3c 251
3e1a3ad8 252 // Start clustering in every chamber
6d50f529 253 for (icham = chamBeg; icham < chamEnd; icham++) {
254 for (iplan = planBeg; iplan < planEnd; iplan++) {
255 for (isect = sectBeg; isect < sectEnd; isect++) {
f7336fa3 256
f162af62 257 Int_t idet = geo.GetDetector(iplan,icham,isect);
d74f970b 258 Int_t ilayer = AliGeomManager::kTRD1 + iplan;
259 Int_t imodule = icham + chamEnd * isect;
260 UShort_t volid = AliGeomManager::LayerToVolUID(ilayer,imodule);
a6dd11e9 261
262 // Get the digits
263 digitsIn = fDigitsManager->GetDigits(idet);
264 // This is to take care of switched off super modules
265 if (digitsIn->GetNtime() == 0) {
266 continue;
267 }
268 digitsIn->Expand();
269 AliTRDdataArrayI *tracksTmp = fDigitsManager->GetDictionary(idet,0);
270 tracksTmp->Expand();
271
f162af62 272 Int_t nRowMax = geo.GetRowMax(iplan,icham,isect);
273 Int_t nColMax = geo.GetColMax(iplan);
f7336fa3 274
f162af62 275 AliTRDpadPlane *padPlane = geo.GetPadPlane(iplan,icham);
6d50f529 276
56178ff4 277 // Calibration object with pad wise values for t0
8ec071c8 278 AliTRDCalROC *calT0ROC = calibration->GetT0ROC(idet);
279 // Calibration object with pad wise values for the gain factors
280 AliTRDCalROC *calGainFactorROC = calibration->GetGainFactorROC(idet);
56178ff4 281 // Calibration value for chamber wise t0
8ec071c8 282 Float_t calT0DetValue = calT0Det->GetValue(idet);
283 // Calibration value for chamber wise gain factor
284 Float_t calGainFactorDetValue = calGainFactorDet->GetValue(idet);
56178ff4 285
db30bf0f 286 Int_t nClusters = 0;
3e1a3ad8 287
a6dd11e9 288 // Apply the gain and the tail cancelation via digital filter
6d50f529 289 AliTRDdataArrayF *digitsOut = new AliTRDdataArrayF(digitsIn->GetNrow()
290 ,digitsIn->GetNcol()
8ec071c8 291 ,digitsIn->GetNtime());
292 Transform(digitsIn
293 ,digitsOut
294 ,nRowMax,nColMax,nTimeTotal
295 ,ADCthreshold
296 ,calGainFactorROC
297 ,calGainFactorDetValue);
a6dd11e9 298
299 // Input digits are not needed any more
300 digitsIn->Compress(1,0);
6d50f529 301
3e1a3ad8 302 // Loop through the chamber and find the maxima
303 for ( row = 0; row < nRowMax; row++) {
de4b10e5 304 for ( col = 2; col < nColMax; col++) {
3e1a3ad8 305 for (time = 0; time < nTimeTotal; time++) {
306
11dc3a9e 307 Float_t signalM = TMath::Abs(digitsOut->GetDataUnchecked(row,col-1,time));
3e1a3ad8 308
309 // Look for the maximum
db30bf0f 310 if (signalM >= maxThresh) {
6a242715 311
312 Float_t signalL = TMath::Abs(digitsOut->GetDataUnchecked(row,col ,time));
313 Float_t signalR = TMath::Abs(digitsOut->GetDataUnchecked(row,col-2,time));
314
6d50f529 315 if ((TMath::Abs(signalL) <= signalM) &&
21ee7de5 316 (TMath::Abs(signalR) < signalM)) {
6493a90f 317 if ((TMath::Abs(signalL) >= sigThresh) ||
318 (TMath::Abs(signalR) >= sigThresh)) {
a6dd11e9 319 // Maximum found, mark the position by a negative signal
320 digitsOut->SetDataUnchecked(row,col-1,time,-signalM);
321 }
3e1a3ad8 322 }
6a242715 323
3e1a3ad8 324 }
6d50f529 325
326 }
327 }
328 }
a6dd11e9 329 tracksTmp->Compress(1,0);
330
331 // The index to the first cluster of a given ROC
332 Int_t firstClusterROC = -1;
333 // The number of cluster in a given ROC
334 Int_t nClusterROC = 0;
3e1a3ad8 335
336 // Now check the maxima and calculate the cluster position
337 for ( row = 0; row < nRowMax ; row++) {
db30bf0f 338 for (time = 0; time < nTimeTotal; time++) {
339 for ( col = 1; col < nColMax-1; col++) {
3e1a3ad8 340
341 // Maximum found ?
a6dd11e9 342 if (digitsOut->GetDataUnchecked(row,col,time) < 0.0) {
f7336fa3 343
8230f242 344 for (iPad = 0; iPad < kNclus; iPad++) {
3e1a3ad8 345 Int_t iPadCol = col - 1 + iPad;
a6dd11e9 346 clusterSignal[iPad] =
347 TMath::Abs(digitsOut->GetDataUnchecked(row,iPadCol,time));
f7336fa3 348 }
349
db30bf0f 350 // Count the number of pads in the cluster
351 Int_t nPadCount = 0;
a6dd11e9 352 Int_t ii;
353 // Look to the left
354 ii = 0;
6d50f529 355 while (TMath::Abs(digitsOut->GetDataUnchecked(row,col-ii ,time)) >= sigThresh) {
db30bf0f 356 nPadCount++;
357 ii++;
358 if (col-ii < 0) break;
359 }
a6dd11e9 360 // Look to the right
db30bf0f 361 ii = 0;
6d50f529 362 while (TMath::Abs(digitsOut->GetDataUnchecked(row,col+ii+1,time)) >= sigThresh) {
db30bf0f 363 nPadCount++;
364 ii++;
365 if (col+ii+1 >= nColMax) break;
366 }
db30bf0f 367 nClusters++;
db30bf0f 368
6d50f529 369 // Look for 5 pad cluster with minimum in the middle
db30bf0f 370 Bool_t fivePadCluster = kFALSE;
6d50f529 371 if (col < (nColMax - 3)) {
3becff3c 372 if (digitsOut->GetDataUnchecked(row,col+2,time) < 0) {
db30bf0f 373 fivePadCluster = kTRUE;
374 }
6d50f529 375 if ((fivePadCluster) && (col < (nColMax - 5))) {
3becff3c 376 if (digitsOut->GetDataUnchecked(row,col+4,time) >= sigThresh) {
db30bf0f 377 fivePadCluster = kFALSE;
378 }
379 }
6d50f529 380 if ((fivePadCluster) && (col > 1)) {
3becff3c 381 if (digitsOut->GetDataUnchecked(row,col-2,time) >= sigThresh) {
db30bf0f 382 fivePadCluster = kFALSE;
383 }
384 }
385 }
386
387 // 5 pad cluster
388 // Modify the signal of the overlapping pad for the left part
389 // of the cluster which remains from a previous unfolding
390 if (iUnfold) {
391 clusterSignal[0] *= ratioLeft;
db30bf0f 392 iUnfold = 0;
393 }
394
395 // Unfold the 5 pad cluster
396 if (fivePadCluster) {
397 for (iPad = 0; iPad < kNsig; iPad++) {
3becff3c 398 padSignal[iPad] = TMath::Abs(digitsOut->GetDataUnchecked(row
a6dd11e9 399 ,col-1+iPad
400 ,time));
f7336fa3 401 }
db30bf0f 402 // Unfold the two maxima and set the signal on
403 // the overlapping pad to the ratio
17b26de4 404 ratioRight = Unfold(kEpsilon,iplan,padSignal);
db30bf0f 405 ratioLeft = 1.0 - ratioRight;
406 clusterSignal[2] *= ratioRight;
db30bf0f 407 iUnfold = 1;
f7336fa3 408 }
f7336fa3 409
a5cadd36 410 Double_t clusterCharge = clusterSignal[0]
411 + clusterSignal[1]
412 + clusterSignal[2];
3e1a3ad8 413
db30bf0f 414 // The position of the cluster
a6dd11e9 415 clusterPads[0] = row + 0.5;
3e1a3ad8 416 // Take the shift of the additional time bins into account
dde59437 417 clusterPads[2] = time + 0.5;
3e1a3ad8 418
3551db50 419 if (recParam->LUTOn()) {
db30bf0f 420 // Calculate the position of the cluster by using the
421 // lookup table method
3becff3c 422 clusterPads[1] = recParam->LUTposition(iplan,clusterSignal[0]
6d50f529 423 ,clusterSignal[1]
424 ,clusterSignal[2]);
db30bf0f 425 }
426 else {
db30bf0f 427 // Calculate the position of the cluster by using the
428 // center of gravity method
a6dd11e9 429 for (Int_t i = 0; i < kNsig; i++) {
430 padSignal[i] = 0.0;
6d50f529 431 }
a6dd11e9 432 padSignal[2] = TMath::Abs(digitsOut->GetDataUnchecked(row,col ,time)); // Central pad
433 padSignal[1] = TMath::Abs(digitsOut->GetDataUnchecked(row,col-1,time)); // Left pad
434 padSignal[3] = TMath::Abs(digitsOut->GetDataUnchecked(row,col+1,time)); // Right pad
6d50f529 435 if ((col > 2) &&
436 (TMath::Abs(digitsOut->GetDataUnchecked(row,col-2,time)) < padSignal[1])) {
3becff3c 437 padSignal[0] = TMath::Abs(digitsOut->GetDataUnchecked(row,col-2,time));
7ad19338 438 }
6d50f529 439 if ((col < nColMax - 3) &&
440 (TMath::Abs(digitsOut->GetDataUnchecked(row,col+2,time)) < padSignal[3])) {
3becff3c 441 padSignal[4] = TMath::Abs(digitsOut->GetDataUnchecked(row,col+2,time));
7ad19338 442 }
6d50f529 443 clusterPads[1] = GetCOG(padSignal);
db30bf0f 444 }
445
a5cadd36 446 Double_t q0 = clusterSignal[0];
447 Double_t q1 = clusterSignal[1];
448 Double_t q2 = clusterSignal[2];
a6dd11e9 449 Double_t clusterSigmaY2 = (q1 * (q0 + q2) + 4.0 * q0 * q2)
450 / (clusterCharge*clusterCharge);
a819a5f7 451
6d50f529 452 //
3551db50 453 // Calculate the position and the error
6d50f529 454 //
455
56178ff4 456 // Correct for t0 (sum of chamber and pad wise values !!!)
457 Float_t calT0ROCValue = calT0ROC->GetValue(col,row);
34eaaa7e 458 Char_t clusterTimeBin = ((Char_t) TMath::Nint(time - (calT0DetValue + calT0ROCValue)));
6d50f529 459 Double_t colSize = padPlane->GetColSize(col);
460 Double_t rowSize = padPlane->GetRowSize(row);
cb86ff6e 461
34eaaa7e 462 Float_t clusterPos[3];
a6dd11e9 463 clusterPos[0] = padPlane->GetColPos(col) - (clusterPads[1] + 0.5) * colSize;
464 clusterPos[1] = padPlane->GetRowPos(row) - 0.5 * rowSize;
6d50f529 465 clusterPos[2] = CalcXposFromTimebin(clusterPads[2],idet,col,row);
34eaaa7e 466 Float_t clusterSig[2];
a6dd11e9 467 clusterSig[0] = (clusterSigmaY2 + 1.0/12.0) * colSize*colSize;
468 clusterSig[1] = rowSize * rowSize / 12.0;
524fc8fa 469
a6dd11e9 470 // Store the amplitudes of the pads in the cluster for later analysis
471 Short_t signals[7] = { 0, 0, 0, 0, 0, 0, 0 };
6d50f529 472 for (Int_t jPad = col-3; jPad <= col+3; jPad++) {
a6dd11e9 473 if ((jPad < 0) ||
474 (jPad >= nColMax-1)) {
6d50f529 475 continue;
476 }
11dc3a9e 477 signals[jPad-col+3] = TMath::Nint(TMath::Abs(digitsOut->GetDataUnchecked(row,jPad,time)));
c85a4951 478 }
6d50f529 479
34eaaa7e 480 // Add the cluster to the output array
481 // The track indices will be stored later
482 AliTRDcluster *cluster = new AliTRDcluster(idet
483 ,clusterCharge
484 ,clusterPos
485 ,clusterSig
486 ,0x0
487 ,((Char_t) nPadCount)
488 ,signals
489 ,((UChar_t) col)
490 ,clusterTimeBin
491 ,clusterPads[1]
492 ,volid);
a6dd11e9 493 // Temporarily store the row, column and time bin of the center pad
494 // Used to later on assign the track indices
495 cluster->SetLabel( row,0);
496 cluster->SetLabel( col,1);
497 cluster->SetLabel(time,2);
34eaaa7e 498 RecPoints()->Add(cluster);
6d50f529 499
a6dd11e9 500 // Store the index of the first cluster in the current ROC
501 if (firstClusterROC < 0) {
502 firstClusterROC = RecPoints()->GetEntriesFast() - 1;
503 }
504 // Count the number of cluster in the current ROC
505 nClusterROC++;
506
507 } // if: Maximum found ?
508
509 } // loop: pad columns
510 } // loop: time bins
511 } // loop: pad rows
11dc3a9e 512
513 delete digitsOut;
f7336fa3 514
a6dd11e9 515 //
516 // Add the track indices to the found clusters
517 //
518
519 // Temporary array to collect the track indices
520 Int_t *idxTracks = new Int_t[kNtrack*nClusterROC];
521
522 // Loop through the dictionary arrays one-by-one
523 // to keep memory consumption low
524 for (Int_t iDict = 0; iDict < kNdict; iDict++) {
525
526 tracksIn = fDigitsManager->GetDictionary(idet,iDict);
527 tracksIn->Expand();
528
529 // Loop though the clusters found in this ROC
530 for (iClusterROC = 0; iClusterROC < nClusterROC; iClusterROC++) {
531
532 AliTRDcluster *cluster = (AliTRDcluster *)
533 RecPoints()->UncheckedAt(firstClusterROC+iClusterROC);
534 row = cluster->GetLabel(0);
535 col = cluster->GetLabel(1);
536 time = cluster->GetLabel(2);
537
538 for (iPad = 0; iPad < kNclus; iPad++) {
539 Int_t iPadCol = col - 1 + iPad;
540 Int_t index = tracksIn->GetDataUnchecked(row,iPadCol,time) - 1;
541 idxTracks[3*iPad+iDict + iClusterROC*kNtrack] = index;
542 }
543
544 }
545
546 // Compress the arrays
547 tracksIn->Compress(1,0);
548
549 }
550
551 // Copy the track indices into the cluster
552 // Loop though the clusters found in this ROC
553 for (iClusterROC = 0; iClusterROC < nClusterROC; iClusterROC++) {
554
555 AliTRDcluster *cluster = (AliTRDcluster *)
556 RecPoints()->UncheckedAt(firstClusterROC+iClusterROC);
557 cluster->SetLabel(-9999,0);
558 cluster->SetLabel(-9999,1);
559 cluster->SetLabel(-9999,2);
560
561 cluster->AddTrackIndex(&idxTracks[iClusterROC*kNtrack]);
562
563 }
564
565 delete [] idxTracks;
f7336fa3 566
3e1a3ad8 567 // Write the cluster and reset the array
793ff80c 568 WriteClusters(idet);
bdbb05bb 569 ResetRecPoints();
6d50f529 570
a6dd11e9 571 } // loop: Sectors
572 } // loop: Planes
573 } // loop: Chambers
f7336fa3 574
f7336fa3 575 return kTRUE;
576
577}
578
a305677e 579//_____________________________________________________________________________
7ad19338 580Double_t AliTRDclusterizerV1::GetCOG(Double_t signal[5])
581{
582 //
6d50f529 583 // Get COG position
584 // Used for clusters with more than 3 pads - where LUT not applicable
585 //
586
a6dd11e9 587 Double_t sum = signal[0]
588 + signal[1]
589 + signal[2]
590 + signal[3]
591 + signal[4];
592
593 Double_t res = (0.0 * (-signal[0] + signal[4])
594 + (-signal[1] + signal[3])) / sum;
6d50f529 595
7ad19338 596 return res;
6d50f529 597
7ad19338 598}
599
f7336fa3 600//_____________________________________________________________________________
a6dd11e9 601Double_t AliTRDclusterizerV1::Unfold(Double_t eps, Int_t plane, Double_t *padSignal)
f7336fa3 602{
603 //
604 // Method to unfold neighbouring maxima.
605 // The charge ratio on the overlapping pad is calculated
606 // until there is no more change within the range given by eps.
607 // The resulting ratio is then returned to the calling method.
608 //
609
a6dd11e9 610 AliTRDcalibDB *calibration = AliTRDcalibDB::Instance();
6d50f529 611 if (!calibration) {
612 AliError("No AliTRDcalibDB instance available\n");
6a739e92 613 return kFALSE;
3551db50 614 }
6a739e92 615
a5cadd36 616 Int_t irc = 0;
a6dd11e9 617 Int_t itStep = 0; // Count iteration steps
f7336fa3 618
a6dd11e9 619 Double_t ratio = 0.5; // Start value for ratio
620 Double_t prevRatio = 0.0; // Store previous ratio
f7336fa3 621
a6dd11e9 622 Double_t newLeftSignal[3] = { 0.0, 0.0, 0.0 }; // Array to store left cluster signal
623 Double_t newRightSignal[3] = { 0.0, 0.0, 0.0 }; // Array to store right cluster signal
624 Double_t newSignal[3] = { 0.0, 0.0, 0.0 };
f7336fa3 625
3e1a3ad8 626 // Start the iteration
f7336fa3 627 while ((TMath::Abs(prevRatio - ratio) > eps) && (itStep < 10)) {
628
629 itStep++;
630 prevRatio = ratio;
631
3e1a3ad8 632 // Cluster position according to charge ratio
a5cadd36 633 Double_t maxLeft = (ratio*padSignal[2] - padSignal[0])
634 / (padSignal[0] + padSignal[1] + ratio*padSignal[2]);
635 Double_t maxRight = (padSignal[4] - (1-ratio)*padSignal[2])
a6dd11e9 636 / ((1.0 - ratio)*padSignal[2] + padSignal[3] + padSignal[4]);
f7336fa3 637
3e1a3ad8 638 // Set cluster charge ratio
6a739e92 639 irc = calibration->PadResponse(1.0,maxLeft ,plane,newSignal);
a5cadd36 640 Double_t ampLeft = padSignal[1] / newSignal[1];
6a739e92 641 irc = calibration->PadResponse(1.0,maxRight,plane,newSignal);
a5cadd36 642 Double_t ampRight = padSignal[3] / newSignal[1];
f7336fa3 643
3e1a3ad8 644 // Apply pad response to parameters
6a739e92 645 irc = calibration->PadResponse(ampLeft ,maxLeft ,plane,newLeftSignal );
646 irc = calibration->PadResponse(ampRight,maxRight,plane,newRightSignal);
f7336fa3 647
3e1a3ad8 648 // Calculate new overlapping ratio
a5cadd36 649 ratio = TMath::Min((Double_t)1.0,newLeftSignal[2] /
a6dd11e9 650 (newLeftSignal[2] + newRightSignal[0]));
f7336fa3 651
652 }
653
654 return ratio;
655
656}
657
3becff3c 658//_____________________________________________________________________________
a6dd11e9 659void AliTRDclusterizerV1::Transform(AliTRDdataArrayI *digitsIn
660 , AliTRDdataArrayF *digitsOut
8ec071c8 661 , Int_t nRowMax, Int_t nColMax, Int_t nTimeTotal
662 , Float_t ADCthreshold
663 , AliTRDCalROC *calGainFactorROC
664 , Float_t calGainFactorDetValue)
3becff3c 665{
3becff3c 666 //
cb86ff6e 667 // Apply gain factor
a6dd11e9 668 // Apply tail cancelation: Transform digitsIn to digitsOut
3becff3c 669 //
670
6d50f529 671 Int_t iRow = 0;
672 Int_t iCol = 0;
673 Int_t iTime = 0;
3becff3c 674
a6dd11e9 675 AliTRDRecParam *recParam = AliTRDRecParam::Instance();
6d50f529 676 if (!recParam) {
677 AliError("No AliTRDRecParam instance available\n");
3becff3c 678 return;
679 }
11dc3a9e 680
a6dd11e9 681 Double_t *inADC = new Double_t[nTimeTotal]; // ADC data before tail cancellation
682 Double_t *outADC = new Double_t[nTimeTotal]; // ADC data after tail cancellation
3becff3c 683
6d50f529 684 for (iRow = 0; iRow < nRowMax; iRow++ ) {
685 for (iCol = 0; iCol < nColMax; iCol++ ) {
a6dd11e9 686
56178ff4 687 Float_t calGainFactorROCValue = calGainFactorROC->GetValue(iCol,iRow);
688 Double_t gain = calGainFactorDetValue
689 * calGainFactorROCValue;
690
6d50f529 691 for (iTime = 0; iTime < nTimeTotal; iTime++) {
3becff3c 692
cb86ff6e 693 //
6d50f529 694 // Add gain
cb86ff6e 695 //
a6dd11e9 696 inADC[iTime] = digitsIn->GetDataUnchecked(iRow,iCol,iTime);
697 inADC[iTime] /= gain;
698 outADC[iTime] = inADC[iTime];
6d50f529 699
3becff3c 700 }
701
702 // Apply the tail cancelation via the digital filter
6d50f529 703 if (recParam->TCOn()) {
a305677e 704 DeConvExp(inADC,outADC,nTimeTotal,recParam->GetTCnexp());
3becff3c 705 }
706
6d50f529 707 for (iTime = 0; iTime < nTimeTotal; iTime++) {
708
3becff3c 709 // Store the amplitude of the digit if above threshold
a305677e 710 if (outADC[iTime] > ADCthreshold) {
11dc3a9e 711 digitsOut->SetDataUnchecked(iRow,iCol,iTime,outADC[iTime]);
3becff3c 712 }
713
714 }
715
716 }
3becff3c 717 }
718
719 delete [] inADC;
720 delete [] outADC;
721
722 return;
723
724}
725
3becff3c 726//_____________________________________________________________________________
a6dd11e9 727void AliTRDclusterizerV1::DeConvExp(Double_t *source, Double_t *target
728 , Int_t n, Int_t nexp)
3becff3c 729{
730 //
6d50f529 731 // Tail cancellation by deconvolution for PASA v4 TRF
3becff3c 732 //
733
734 Double_t rates[2];
735 Double_t coefficients[2];
736
6d50f529 737 // Initialization (coefficient = alpha, rates = lambda)
3becff3c 738 Double_t R1 = 1.0;
739 Double_t R2 = 1.0;
740 Double_t C1 = 0.5;
741 Double_t C2 = 0.5;
742
743 if (nexp == 1) { // 1 Exponentials
744 R1 = 1.156;
745 R2 = 0.130;
746 C1 = 0.066;
747 C2 = 0.000;
748 }
749 if (nexp == 2) { // 2 Exponentials
750 R1 = 1.156;
751 R2 = 0.130;
752 C1 = 0.114;
753 C2 = 0.624;
754 }
755
756 coefficients[0] = C1;
757 coefficients[1] = C2;
758
a6dd11e9 759 Double_t Dt = 0.1;
3becff3c 760
761 rates[0] = TMath::Exp(-Dt/(R1));
762 rates[1] = TMath::Exp(-Dt/(R2));
763
6d50f529 764 Int_t i = 0;
765 Int_t k = 0;
3becff3c 766
6d50f529 767 Double_t reminder[2];
768 Double_t correction;
769 Double_t result;
3becff3c 770
6d50f529 771 // Attention: computation order is important
772 correction = 0.0;
773 for (k = 0; k < nexp; k++) {
774 reminder[k] = 0.0;
775 }
776 for (i = 0; i < n; i++) {
a6dd11e9 777 result = (source[i] - correction); // No rescaling
3becff3c 778 target[i] = result;
779
6d50f529 780 for (k = 0; k < nexp; k++) {
781 reminder[k] = rates[k] * (reminder[k] + coefficients[k] * result);
782 }
783 correction = 0.0;
784 for (k = 0; k < nexp; k++) {
785 correction += reminder[k];
786 }
3becff3c 787 }
788
789}