default values of individual cell gain is +1.0
[u/mrichter/AliRoot.git] / TRD / AliTRDdigitizer.cxx
CommitLineData
f7336fa3 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
88cb7938 16/* $Id$ */
f7336fa3 17
625f5260 18////////////////////////////////////////////////////////////////////////////
19// //
20// Creates and handles digits from TRD hits //
21// //
22// Authors: C. Blume (blume@ikf.uni-frankfurt.de) //
23// C. Lippmann //
24// B. Vulpescu //
25// //
26// The following effects are included: //
27// - Diffusion //
28// - ExB effects //
29// - Gas gain including fluctuations //
30// - Pad-response (simple Gaussian approximation) //
31// - Time-response //
32// - Electronics noise //
33// - Electronics gain //
34// - Digitization //
b65e5048 35// - Zero suppression //
625f5260 36// //
37////////////////////////////////////////////////////////////////////////////
6798b56e 38
f7a1cc68 39#include <TGeoManager.h>
abaf1f1d 40#include <TList.h>
f7a1cc68 41#include <TMath.h>
f7a1cc68 42#include <TRandom.h>
f7a1cc68 43#include <TTree.h>
26d3c914 44
793ff80c 45#include "AliRun.h"
3e2e3ece 46#include "AliMC.h"
88cb7938 47#include "AliRunLoader.h"
48#include "AliLoader.h"
49#include "AliConfig.h"
85cbec76 50#include "AliRunDigitizer.h"
88cb7938 51#include "AliRunLoader.h"
52#include "AliLoader.h"
ad2cc20b 53#include "AliLog.h"
621310dd 54
f7336fa3 55#include "AliTRD.h"
793ff80c 56#include "AliTRDhit.h"
f7336fa3 57#include "AliTRDdigitizer.h"
b65e5048 58#include "AliTRDarrayDictionary.h"
59#include "AliTRDarrayADC.h"
60#include "AliTRDarraySignal.h"
da581aea 61#include "AliTRDdigitsManager.h"
793ff80c 62#include "AliTRDgeometry.h"
a5cadd36 63#include "AliTRDpadPlane.h"
3551db50 64#include "AliTRDcalibDB.h"
65#include "AliTRDSimParam.h"
66#include "AliTRDCommonParam.h"
ecf39416 67#include "AliTRDfeeParam.h"
b65e5048 68#include "AliTRDmcmSim.h"
966f6939 69#include "AliTRDdigitsParam.h"
70
4329977a 71#include "Cal/AliTRDCalROC.h"
72#include "Cal/AliTRDCalDet.h"
73
f7336fa3 74ClassImp(AliTRDdigitizer)
75
76//_____________________________________________________________________________
85cbec76 77AliTRDdigitizer::AliTRDdigitizer()
4d18a639 78 :AliDigitizer()
79 ,fRunLoader(0)
80 ,fDigitsManager(0)
81 ,fSDigitsManager(0)
82 ,fSDigitsManagerList(0)
83 ,fTRD(0)
84 ,fGeo(0)
85 ,fEvent(0)
86 ,fMasks(0)
87 ,fCompress(kTRUE)
88 ,fSDigits(kFALSE)
4d18a639 89 ,fMergeSignalOnly(kFALSE)
f7336fa3 90{
91 //
92 // AliTRDdigitizer default constructor
93 //
3551db50 94
f7336fa3 95}
96
97//_____________________________________________________________________________
4d18a639 98AliTRDdigitizer::AliTRDdigitizer(const Text_t *name, const Text_t *title)
99 :AliDigitizer(name,title)
100 ,fRunLoader(0)
101 ,fDigitsManager(0)
102 ,fSDigitsManager(0)
103 ,fSDigitsManagerList(0)
104 ,fTRD(0)
105 ,fGeo(0)
106 ,fEvent(0)
107 ,fMasks(0)
108 ,fCompress(kTRUE)
109 ,fSDigits(kFALSE)
4d18a639 110 ,fMergeSignalOnly(kFALSE)
f7336fa3 111{
112 //
85cbec76 113 // AliTRDdigitizer constructor
114 //
115
85cbec76 116}
117
118//_____________________________________________________________________________
119AliTRDdigitizer::AliTRDdigitizer(AliRunDigitizer *manager
4d18a639 120 , const Text_t *name, const Text_t *title)
121 :AliDigitizer(manager,name,title)
122 ,fRunLoader(0)
123 ,fDigitsManager(0)
124 ,fSDigitsManager(0)
125 ,fSDigitsManagerList(0)
126 ,fTRD(0)
127 ,fGeo(0)
128 ,fEvent(0)
129 ,fMasks(0)
130 ,fCompress(kTRUE)
131 ,fSDigits(kFALSE)
4d18a639 132 ,fMergeSignalOnly(kFALSE)
85cbec76 133{
134 //
135 // AliTRDdigitizer constructor
f7336fa3 136 //
137
bfc40adc 138}
139
140//_____________________________________________________________________________
141AliTRDdigitizer::AliTRDdigitizer(AliRunDigitizer *manager)
4d18a639 142 :AliDigitizer(manager,"AliTRDdigitizer","TRD digitizer")
143 ,fRunLoader(0)
144 ,fDigitsManager(0)
145 ,fSDigitsManager(0)
146 ,fSDigitsManagerList(0)
147 ,fTRD(0)
148 ,fGeo(0)
149 ,fEvent(0)
150 ,fMasks(0)
151 ,fCompress(kTRUE)
152 ,fSDigits(kFALSE)
4d18a639 153 ,fMergeSignalOnly(kFALSE)
bfc40adc 154{
155 //
156 // AliTRDdigitizer constructor
157 //
158
f7336fa3 159}
160
161//_____________________________________________________________________________
4d18a639 162AliTRDdigitizer::AliTRDdigitizer(const AliTRDdigitizer &d)
163 :AliDigitizer(d)
164 ,fRunLoader(0)
165 ,fDigitsManager(0)
166 ,fSDigitsManager(0)
167 ,fSDigitsManagerList(0)
168 ,fTRD(0)
169 ,fGeo(0)
170 ,fEvent(0)
171 ,fMasks(0)
172 ,fCompress(d.fCompress)
173 ,fSDigits(d.fSDigits)
4d18a639 174 ,fMergeSignalOnly(d.fMergeSignalOnly)
8230f242 175{
176 //
177 // AliTRDdigitizer copy constructor
178 //
179
8230f242 180}
181
182//_____________________________________________________________________________
f7336fa3 183AliTRDdigitizer::~AliTRDdigitizer()
184{
8230f242 185 //
186 // AliTRDdigitizer destructor
187 //
f7336fa3 188
abaf1f1d 189 if (fDigitsManager) {
190 delete fDigitsManager;
4d18a639 191 fDigitsManager = 0;
f7336fa3 192 }
193
966f6939 194 if (fSDigitsManager) {
d4cbb500 195 // s-digitsmanager will be deleted via list
4d18a639 196 fSDigitsManager = 0;
197 }
f7336fa3 198
abaf1f1d 199 if (fSDigitsManagerList) {
47b5729a 200 fSDigitsManagerList->Delete();
abaf1f1d 201 delete fSDigitsManagerList;
4487dad0 202 fSDigitsManagerList = 0;
e23fbb27 203 }
204
205 if (fMasks) {
206 delete [] fMasks;
4329977a 207 fMasks = 0;
e23fbb27 208 }
209
f162af62 210 if (fGeo) {
211 delete fGeo;
212 fGeo = 0;
213 }
214
f7336fa3 215}
216
217//_____________________________________________________________________________
dd9a6ee3 218AliTRDdigitizer &AliTRDdigitizer::operator=(const AliTRDdigitizer &d)
219{
220 //
221 // Assignment operator
222 //
223
625f5260 224 if (this != &d) {
225 ((AliTRDdigitizer &) d).Copy(*this);
226 }
4d18a639 227
dd9a6ee3 228 return *this;
229
230}
231
232//_____________________________________________________________________________
e0d47c25 233void AliTRDdigitizer::Copy(TObject &d) const
8230f242 234{
235 //
236 // Copy function
237 //
238
85a5290f 239 ((AliTRDdigitizer &) d).fRunLoader = 0;
4487dad0 240 ((AliTRDdigitizer &) d).fDigitsManager = 0;
85a5290f 241 ((AliTRDdigitizer &) d).fSDigitsManager = 0;
242 ((AliTRDdigitizer &) d).fSDigitsManagerList = 0;
4487dad0 243 ((AliTRDdigitizer &) d).fTRD = 0;
244 ((AliTRDdigitizer &) d).fGeo = 0;
85a5290f 245 ((AliTRDdigitizer &) d).fEvent = 0;
246 ((AliTRDdigitizer &) d).fMasks = 0;
abaf1f1d 247 ((AliTRDdigitizer &) d).fCompress = fCompress;
abaf1f1d 248 ((AliTRDdigitizer &) d).fSDigits = fSDigits;
4487dad0 249 ((AliTRDdigitizer &) d).fMergeSignalOnly = fMergeSignalOnly;
3becff3c 250
e23fbb27 251}
252
253//_____________________________________________________________________________
621310dd 254void AliTRDdigitizer::Exec(const Option_t * const option)
e23fbb27 255{
256 //
257 // Executes the merging
258 //
259
260 Int_t iInput;
261
262 AliTRDdigitsManager *sdigitsManager;
263
264 TString optionString = option;
265 if (optionString.Contains("deb")) {
9afbd7de 266 AliLog::SetClassDebugLevel("AliTRDdigitizer",1);
7925de54 267 AliInfo("Called with debug option");
e23fbb27 268 }
269
cec4059b 270 // The AliRoot file is already connected by the manager
625f5260 271 AliRunLoader *inrl = 0x0;
88cb7938 272
9afbd7de 273 if (gAlice) {
7925de54 274 AliDebug(1,"AliRun object found on file.");
9afbd7de 275 }
4487dad0 276 else {
88cb7938 277 inrl = AliRunLoader::GetRunLoader(fManager->GetInputFolderName(0));
278 inrl->LoadgAlice();
279 gAlice = inrl->GetAliRun();
9afbd7de 280 if (!gAlice) {
7925de54 281 AliError("Could not find AliRun object.")
9afbd7de 282 return;
283 }
4487dad0 284 }
cec4059b 285
e23fbb27 286 Int_t nInput = fManager->GetNinputs();
4d18a639 287 fMasks = new Int_t[nInput];
e23fbb27 288 for (iInput = 0; iInput < nInput; iInput++) {
289 fMasks[iInput] = fManager->GetMask(iInput);
290 }
e23fbb27 291
9afbd7de 292 //
e23fbb27 293 // Initialization
9afbd7de 294 //
e23fbb27 295
95867fd1 296 AliRunLoader *orl = AliRunLoader::GetRunLoader(fManager->GetOutputFolderName());
297
67c67368 298 if (InitDetector()) {
9afbd7de 299
95867fd1 300 AliLoader *ogime = orl->GetLoader("TRDLoader");
67c67368 301
95867fd1 302 TTree *tree = 0;
9afbd7de 303 if (fSDigits) {
304 // If we produce SDigits
305 tree = ogime->TreeS();
306 if (!tree) {
307 ogime->MakeTree("S");
67c67368 308 tree = ogime->TreeS();
67c67368 309 }
9afbd7de 310 }
311 else {
312 // If we produce Digits
313 tree = ogime->TreeD();
314 if (!tree) {
315 ogime->MakeTree("D");
316 tree = ogime->TreeD();
67c67368 317 }
9afbd7de 318 }
319
67c67368 320 MakeBranch(tree);
9afbd7de 321
67c67368 322 }
323
e23fbb27 324 for (iInput = 0; iInput < nInput; iInput++) {
325
7925de54 326 AliDebug(1,Form("Add input stream %d",iInput));
e23fbb27 327
9afbd7de 328 // Check if the input tree exists
88cb7938 329 inrl = AliRunLoader::GetRunLoader(fManager->GetInputFolderName(iInput));
4d18a639 330 AliLoader *gime = inrl->GetLoader("TRDLoader");
88cb7938 331
4d18a639 332 TTree *treees = gime->TreeS();
9afbd7de 333 if (treees == 0x0) {
334 if (gime->LoadSDigits()) {
335 AliError(Form("Error Occured while loading S. Digits for input %d.",iInput));
336 return;
337 }
4d18a639 338 treees = gime->TreeS();
9afbd7de 339 }
88cb7938 340
341 if (treees == 0x0) {
7925de54 342 AliError(Form("Input stream %d does not exist",iInput));
c57e2264 343 return;
344 }
345
e23fbb27 346 // Read the s-digits via digits manager
347 sdigitsManager = new AliTRDdigitsManager();
e23fbb27 348 sdigitsManager->SetSDigits(kTRUE);
88cb7938 349
4d18a639 350 AliRunLoader *rl = AliRunLoader::GetRunLoader(fManager->GetInputFolderName(iInput));
351 AliLoader *gimme = rl->GetLoader("TRDLoader");
b65e5048 352 if (!gimme->TreeS())
353 {
354 gimme->LoadSDigits();
355 }
e23fbb27 356
b65e5048 357 sdigitsManager->ReadDigits(gimme->TreeS());
358
e23fbb27 359 // Add the s-digits to the input list
360 AddSDigitsManager(sdigitsManager);
361
362 }
363
364 // Convert the s-digits to normal digits
7925de54 365 AliDebug(1,"Do the conversion");
e23fbb27 366 SDigits2Digits();
367
368 // Store the digits
7925de54 369 AliDebug(1,"Write the digits");
e23fbb27 370 fDigitsManager->WriteDigits();
88cb7938 371
9afbd7de 372 // Write parameters
67c67368 373 orl->CdGAFile();
67c67368 374
26d3c914 375 // Clean up
b1113c6b 376 DeleteSDigitsManager();
377
26d3c914 378 AliDebug(1,"Done");
379
e23fbb27 380}
381
382//_____________________________________________________________________________
e23fbb27 383Bool_t AliTRDdigitizer::Open(const Char_t *file, Int_t nEvent)
f7336fa3 384{
385 //
386 // Opens a ROOT-file with TRD-hits and reads in the hit-tree
387 //
f7336fa3 388 // Connect the AliRoot file containing Geometry, Kine, and Hits
3becff3c 389 //
f540341d 390
e191bb57 391 TString evfoldname = AliConfig::GetDefaultEventFolderName();
9afbd7de 392
f540341d 393 fRunLoader = AliRunLoader::GetRunLoader(evfoldname);
9afbd7de 394 if (!fRunLoader) {
395 fRunLoader = AliRunLoader::Open(file,evfoldname,"UPDATE");
396 }
9afbd7de 397 if (!fRunLoader) {
95867fd1 398 AliError(Form("Can not open session for file %s.",file));
399 return kFALSE;
400 }
401
402 if (!fRunLoader->GetAliRun()) {
403 fRunLoader->LoadgAlice();
404 }
405 gAlice = fRunLoader->GetAliRun();
406
407 if (gAlice) {
7925de54 408 AliDebug(1,"AliRun object found on file.");
95867fd1 409 }
410 else {
7925de54 411 AliError("Could not find AliRun object.");
95867fd1 412 return kFALSE;
413 }
414
415 fEvent = nEvent;
416
417 AliLoader *loader = fRunLoader->GetLoader("TRDLoader");
418 if (!loader) {
419 AliError("Can not get TRD loader from Run Loader");
420 return kFALSE;
421 }
422
423 if (InitDetector()) {
424 TTree *tree = 0;
425 if (fSDigits) {
426 // If we produce SDigits
427 tree = loader->TreeS();
428 if (!tree) {
429 loader->MakeTree("S");
430 tree = loader->TreeS();
431 }
432 }
433 else {
434 // If we produce Digits
435 tree = loader->TreeD();
436 if (!tree) {
437 loader->MakeTree("D");
438 tree = loader->TreeD();
439 }
440 }
441 return MakeBranch(tree);
442 }
443 else {
444 return kFALSE;
445 }
446
447}
448
449//_____________________________________________________________________________
621310dd 450Bool_t AliTRDdigitizer::Open(AliRunLoader * const runLoader, Int_t nEvent)
95867fd1 451{
452 //
453 // Opens a ROOT-file with TRD-hits and reads in the hit-tree
454 //
455 // Connect the AliRoot file containing Geometry, Kine, and Hits
456 //
457
458 fRunLoader = runLoader;
459 if (!fRunLoader) {
460 AliError("RunLoader does not exist");
461 return kFALSE;
4d18a639 462 }
88cb7938 463
9afbd7de 464 if (!fRunLoader->GetAliRun()) {
465 fRunLoader->LoadgAlice();
466 }
88cb7938 467 gAlice = fRunLoader->GetAliRun();
468
da581aea 469 if (gAlice) {
7925de54 470 AliDebug(1,"AliRun object found on file.");
da581aea 471 }
472 else {
7925de54 473 AliError("Could not find AliRun object.");
da581aea 474 return kFALSE;
475 }
f7336fa3 476
477 fEvent = nEvent;
478
4d18a639 479 AliLoader *loader = fRunLoader->GetLoader("TRDLoader");
9afbd7de 480 if (!loader) {
481 AliError("Can not get TRD loader from Run Loader");
482 return kFALSE;
483 }
88cb7938 484
abaf1f1d 485 if (InitDetector()) {
4d18a639 486 TTree *tree = 0;
9afbd7de 487 if (fSDigits) {
488 // If we produce SDigits
489 tree = loader->TreeS();
490 if (!tree) {
491 loader->MakeTree("S");
492 tree = loader->TreeS();
4d18a639 493 }
9afbd7de 494 }
495 else {
496 // If we produce Digits
95867fd1 497 tree = loader->TreeD();
9afbd7de 498 if (!tree) {
499 loader->MakeTree("D");
500 tree = loader->TreeD();
4d18a639 501 }
9afbd7de 502 }
88cb7938 503 return MakeBranch(tree);
abaf1f1d 504 }
505 else {
506 return kFALSE;
507 }
793ff80c 508
509}
510
511//_____________________________________________________________________________
512Bool_t AliTRDdigitizer::InitDetector()
513{
514 //
515 // Sets the pointer to the TRD detector and the geometry
516 //
517
dd9a6ee3 518 // Get the pointer to the detector class and check for version 1
4487dad0 519 fTRD = (AliTRD *) gAlice->GetDetector("TRD");
cec4059b 520 if (!fTRD) {
7925de54 521 AliFatal("No TRD module found");
cec4059b 522 exit(1);
523 }
dd9a6ee3 524 if (fTRD->IsVersion() != 1) {
7925de54 525 AliFatal("TRD must be version 1 (slow simulator)");
dd9a6ee3 526 exit(1);
527 }
528
529 // Get the geometry
f162af62 530 fGeo = new AliTRDgeometry();
dd9a6ee3 531
abaf1f1d 532 // Create a digits manager
625f5260 533 if (fDigitsManager) {
534 delete fDigitsManager;
535 }
abaf1f1d 536 fDigitsManager = new AliTRDdigitsManager();
537 fDigitsManager->SetSDigits(fSDigits);
538 fDigitsManager->CreateArrays();
539 fDigitsManager->SetEvent(fEvent);
abaf1f1d 540
541 // The list for the input s-digits manager to be merged
47b5729a 542 if (fSDigitsManagerList) {
543 fSDigitsManagerList->Delete();
3becff3c 544 }
545 else {
47b5729a 546 fSDigitsManagerList = new TList();
547 }
abaf1f1d 548
4487dad0 549 return kTRUE;
f7336fa3 550
551}
f7336fa3 552//_____________________________________________________________________________
95867fd1 553Bool_t AliTRDdigitizer::MakeBranch(TTree *tree) const
6244debe 554{
abaf1f1d 555 //
556 // Create the branches for the digits array
6244debe 557 //
558
88cb7938 559 return fDigitsManager->MakeBranch(tree);
6244debe 560
561}
562
563//_____________________________________________________________________________
625f5260 564void AliTRDdigitizer::AddSDigitsManager(AliTRDdigitsManager *man)
565{
566 //
567 // Add a digits manager for s-digits to the input list.
568 //
569
570 fSDigitsManagerList->Add(man);
571
572}
573
574//_____________________________________________________________________________
575void AliTRDdigitizer::DeleteSDigitsManager()
576{
577 //
578 // Removes digits manager from the input list.
579 //
580
581 fSDigitsManagerList->Delete();
582
583}
584
585//_____________________________________________________________________________
f7336fa3 586Bool_t AliTRDdigitizer::MakeDigits()
587{
588 //
872a7aba 589 // Creates digits.
f7336fa3 590 //
591
625f5260 592 AliDebug(1,"Start creating digits");
593
594 if (!fGeo) {
595 AliError("No geometry defined");
596 return kFALSE;
597 }
f7336fa3 598
625f5260 599 AliTRDcalibDB *calibration = AliTRDcalibDB::Instance();
600 if (!calibration) {
601 AliFatal("Could not get calibration object");
602 return kFALSE;
603 }
604
605 const Int_t kNdet = AliTRDgeometry::Ndet();
606
607 Float_t **hits = new Float_t*[kNdet];
608 Int_t *nhit = new Int_t[kNdet];
609
b65e5048 610 AliTRDarraySignal *signals = 0x0;
5896bc23 611
612 //
613 if (calibration->GetNumberOfTimeBinsDCS() != AliTRDSimParam::Instance()->GetNTimeBins()) {
614 AliWarning(Form("Number of time bins is different to OCDB value [SIM=%d, OCDB=%d]"
615 ,AliTRDSimParam::Instance()->GetNTimeBins()
616 ,calibration->GetNumberOfTimeBinsDCS()));
617 }
625f5260 618
619 // Sort all hits according to detector number
620 if (!SortHits(hits,nhit)) {
621 AliError("Sorting hits failed");
622 return kFALSE;
623 }
624
625 // Loop through all detectors
626 for (Int_t det = 0; det < kNdet; det++) {
627
628 // Detectors that are switched off, not installed, etc.
629 if (( calibration->IsChamberInstalled(det)) &&
b65e5048 630 (!calibration->IsChamberMasked(det)) &&
625f5260 631 ( fGeo->ChamberInGeometry(det)) &&
632 (nhit[det] > 0)) {
633
b65e5048 634 signals = new AliTRDarraySignal();
635
625f5260 636 // Convert the hits of the current detector to detector signals
637 if (!ConvertHits(det,hits[det],nhit[det],signals)) {
b65e5048 638 AliError(Form("Conversion of hits failed for detector=%d",det));
625f5260 639 return kFALSE;
640 }
641 // Convert the detector signals to digits or s-digits
642 if (!ConvertSignals(det,signals)) {
b65e5048 643 AliError(Form("Conversion of signals failed for detector=%d",det));
644 return kFALSE;
625f5260 645 }
646
647 // Delete the signals array
648 delete signals;
649 signals = 0x0;
650
651 } // if: detector status
652
27cea06a 653 delete [] hits[det];
654
625f5260 655 } // for: detector
656
657 delete [] hits;
658 delete [] nhit;
659
5896bc23 660 // Save the values for the raw data headers
661 fDigitsManager->GetDigitsParam()->SetNTimeBins(AliTRDSimParam::Instance()->GetNTimeBins());
662 fDigitsManager->GetDigitsParam()->SetADCbaseline(AliTRDSimParam::Instance()->GetADCbaseline());
663
625f5260 664 return kTRUE;
665
666}
667
668//_____________________________________________________________________________
669Bool_t AliTRDdigitizer::SortHits(Float_t **hits, Int_t *nhit)
670{
671 //
672 // Read all the hits and sorts them according to detector number
673 // in the output array <hits>.
674 //
675
676 AliDebug(1,"Start sorting hits");
677
678 const Int_t kNdet = AliTRDgeometry::Ndet();
679 // Size of the hit vector
680 const Int_t kNhit = 6;
681
682 Float_t *xyz = 0;
683 Int_t nhitTrk = 0;
684
685 Int_t *lhit = new Int_t[kNdet];
686
687 for (Int_t det = 0; det < kNdet; det++) {
688 lhit[det] = 0;
689 nhit[det] = 0;
690 hits[det] = 0;
691 }
692
693 AliLoader *gimme = fRunLoader->GetLoader("TRDLoader");
694 if (!gimme->TreeH()) {
695 gimme->LoadHits();
696 }
697 TTree *hitTree = gimme->TreeH();
698 if (hitTree == 0x0) {
699 AliError("Can not get TreeH");
700 return kFALSE;
701 }
702 fTRD->SetTreeAddress();
703
704 // Get the number of entries in the hit tree
705 // (Number of primary particles creating a hit somewhere)
706 Int_t nTrk = (Int_t) hitTree->GetEntries();
707 AliDebug(1,Form("Found %d tracks",nTrk));
708
709 // Loop through all the tracks in the tree
710 for (Int_t iTrk = 0; iTrk < nTrk; iTrk++) {
711
3e2e3ece 712 gAlice->GetMCApp()->ResetHits();
625f5260 713 hitTree->GetEvent(iTrk);
714
715 if (!fTRD->Hits()) {
716 AliError(Form("No hits array for track = %d",iTrk));
717 continue;
718 }
719
720 // Number of hits for this track
721 nhitTrk = fTRD->Hits()->GetEntriesFast();
722
723 Int_t hitCnt = 0;
724 // Loop through the TRD hits
725 AliTRDhit *hit = (AliTRDhit *) fTRD->FirstHit(-1);
726 while (hit) {
727
728 hitCnt++;
729
730 // Don't analyze test hits
731 if (((Int_t) hit->GetCharge()) != 0) {
732
733 Int_t trk = hit->Track();
734 Int_t det = hit->GetDetector();
735 Int_t q = hit->GetCharge();
736 Float_t x = hit->X();
737 Float_t y = hit->Y();
738 Float_t z = hit->Z();
739 Float_t time = hit->GetTime();
740
741 if (nhit[det] == lhit[det]) {
742 // Inititialization of new detector
743 xyz = new Float_t[kNhit*(nhitTrk+lhit[det])];
744 if (hits[det]) {
745 memcpy(xyz,hits[det],sizeof(Float_t)*kNhit*lhit[det]);
746 delete [] hits[det];
747 }
748 lhit[det] += nhitTrk;
749 hits[det] = xyz;
750 }
751 else {
752 xyz = hits[det];
753 }
754 xyz[nhit[det]*kNhit+0] = x;
755 xyz[nhit[det]*kNhit+1] = y;
756 xyz[nhit[det]*kNhit+2] = z;
757 xyz[nhit[det]*kNhit+3] = q;
758 xyz[nhit[det]*kNhit+4] = trk;
759 xyz[nhit[det]*kNhit+5] = time;
760 nhit[det]++;
761
762 } // if: charge != 0
763
764 hit = (AliTRDhit *) fTRD->NextHit();
765
766 } // for: hits of one track
767
768 } // for: tracks
769
770 delete [] lhit;
771
772 return kTRUE;
773
774}
f7336fa3 775
625f5260 776//_____________________________________________________________________________
621310dd 777Bool_t AliTRDdigitizer::ConvertHits(Int_t det
778 , const Float_t * const hits
779 , Int_t nhit
b65e5048 780 , AliTRDarraySignal *signals)
625f5260 781{
782 //
783 // Converts the detectorwise sorted hits to detector signals
784 //
785
786 AliDebug(1,Form("Start converting hits for detector=%d (nhits=%d)",det,nhit));
f7336fa3 787
793ff80c 788 // Number of pads included in the pad response
a5cadd36 789 const Int_t kNpad = 3;
793ff80c 790 // Number of track dictionary arrays
625f5260 791 const Int_t kNdict = AliTRDdigitsManager::kNDict;
792 // Size of the hit vector
793 const Int_t kNhit = 6;
793ff80c 794
4329977a 795 // Width of the amplification region
796 const Float_t kAmWidth = AliTRDgeometry::AmThick();
3becff3c 797 // Width of the drift region
ccb4315c 798 const Float_t kDrWidth = AliTRDgeometry::DrThick();
4329977a 799 // Drift + amplification region
800 const Float_t kDrMin = - 0.5 * kAmWidth;
801 const Float_t kDrMax = kDrWidth + 0.5 * kAmWidth;
3551db50 802
625f5260 803 Int_t iPad = 0;
804 Int_t dict = 0;
805 Int_t timeBinTRFend = 1;
872a7aba 806
a5cadd36 807 Double_t pos[3];
4329977a 808 Double_t loc[3];
a5cadd36 809 Double_t padSignal[kNpad];
810 Double_t signalOld[kNpad];
872a7aba 811
b65e5048 812 AliTRDarrayDictionary *dictionary[kNdict];
4329977a 813
9afbd7de 814 AliTRDSimParam *simParam = AliTRDSimParam::Instance();
9afbd7de 815 AliTRDCommonParam *commonParam = AliTRDCommonParam::Instance();
625f5260 816 AliTRDcalibDB *calibration = AliTRDcalibDB::Instance();
817
3becff3c 818 if (!commonParam) {
4329977a 819 AliFatal("Could not get common parameterss");
3551db50 820 return kFALSE;
821 }
625f5260 822 if (!simParam) {
823 AliFatal("Could not get simulation parameters");
824 return kFALSE;
825 }
3becff3c 826 if (!calibration) {
4329977a 827 AliFatal("Could not get calibration object");
3551db50 828 return kFALSE;
829 }
830
625f5260 831 // Get the detector wise calibration objects
832 AliTRDCalROC *calVdriftROC = 0;
833 Float_t calVdriftDetValue = 0.0;
834 const AliTRDCalDet *calVdriftDet = calibration->GetVdriftDet();
835 AliTRDCalROC *calT0ROC = 0;
836 Float_t calT0DetValue = 0.0;
837 const AliTRDCalDet *calT0Det = calibration->GetT0Det();
4329977a 838
4329977a 839 if (simParam->TRFOn()) {
840 timeBinTRFend = ((Int_t) (simParam->GetTRFhi()
841 * commonParam->GetSamplingFrequency())) - 1;
4329977a 842 }
843
5896bc23 844 Int_t nTimeTotal = simParam->GetNTimeBins();
b43a3e17 845 Float_t samplingRate = commonParam->GetSamplingFrequency();
4329977a 846 Float_t elAttachProp = simParam->GetElAttachProp() / 100.0;
a328fff9 847
625f5260 848 AliTRDpadPlane *padPlane = fGeo->GetPadPlane(det);
b65e5048 849 Int_t layer = fGeo->GetLayer(det); //update
625f5260 850 Float_t row0 = padPlane->GetRow0ROC();
851 Int_t nRowMax = padPlane->GetNrows();
852 Int_t nColMax = padPlane->GetNcols();
853
854 // Create a new array for the signals
855 signals->Allocate(nRowMax,nColMax,nTimeTotal);
856
857 // Create a new array for the dictionary
858 for (dict = 0; dict < kNdict; dict++) {
b65e5048 859 dictionary[dict] = (AliTRDarrayDictionary *) fDigitsManager->GetDictionary(det,dict);
625f5260 860 dictionary[dict]->Allocate(nRowMax,nColMax,nTimeTotal);
861 }
862
863 // Loop through the hits in this detector
864 for (Int_t hit = 0; hit < nhit; hit++) {
865
866 pos[0] = hits[hit*kNhit+0];
867 pos[1] = hits[hit*kNhit+1];
868 pos[2] = hits[hit*kNhit+2];
869 Float_t q = hits[hit*kNhit+3];
870 Float_t hittime = hits[hit*kNhit+5];
871 Int_t track = ((Int_t) hits[hit*kNhit+4]);
872
873 Int_t inDrift = 1;
874
875 // Find the current volume with the geo manager
876 gGeoManager->SetCurrentPoint(pos);
877 gGeoManager->FindNode();
878 if (strstr(gGeoManager->GetPath(),"/UK")) {
879 inDrift = 0;
880 }
793ff80c 881
625f5260 882 // Get the calibration objects
883 calVdriftROC = calibration->GetVdriftROC(det);
884 calVdriftDetValue = calVdriftDet->GetValue(det);
885 calT0ROC = calibration->GetT0ROC(det);
886 calT0DetValue = calT0Det->GetValue(det);
887
888 // Go to the local coordinate system:
889 // loc[0] - col direction in amplification or driftvolume
890 // loc[1] - row direction in amplification or driftvolume
891 // loc[2] - time direction in amplification or driftvolume
892 gGeoManager->MasterToLocal(pos,loc);
893 if (inDrift) {
894 // Relative to middle of amplification region
895 loc[2] = loc[2] - kDrWidth/2.0 - kAmWidth/2.0;
896 }
793ff80c 897
625f5260 898 // The driftlength [cm] (w/o diffusion yet !).
899 // It is negative if the hit is between pad plane and anode wires.
900 Double_t driftlength = -1.0 * loc[2];
e23fbb27 901
625f5260 902 // Stupid patch to take care of TR photons that are absorbed
903 // outside the chamber volume. A real fix would actually need
904 // a more clever implementation of the TR hit generation
905 if (q < 0.0) {
906 if ((loc[1] < padPlane->GetRowEndROC()) ||
907 (loc[1] > padPlane->GetRow0ROC())) {
f881dc35 908 continue;
909 }
625f5260 910 if ((driftlength < kDrMin) ||
911 (driftlength > kDrMax)) {
912 continue;
4329977a 913 }
625f5260 914 }
f881dc35 915
625f5260 916 // Get row and col of unsmeared electron to retrieve drift velocity
917 // The pad row (z-direction)
918 Int_t rowE = padPlane->GetPadRowNumberROC(loc[1]);
919 if (rowE < 0) {
920 continue;
921 }
922 Double_t rowOffset = padPlane->GetPadRowOffsetROC(rowE,loc[1]);
923 // The pad column (rphi-direction)
924 Double_t offsetTilt = padPlane->GetTiltOffset(rowOffset);
925 Int_t colE = padPlane->GetPadColNumber(loc[0]+offsetTilt);
926 if (colE < 0) {
927 continue;
928 }
0a17cc30 929 Double_t colOffset = 0.0;
f881dc35 930
625f5260 931 // Normalized drift length
932 Float_t driftvelocity = calVdriftDetValue * calVdriftROC->GetValue(colE,rowE);
933 Double_t absdriftlength = TMath::Abs(driftlength);
934 if (commonParam->ExBOn()) {
935 absdriftlength /= TMath::Sqrt(GetLorentzFactor(driftvelocity));
936 }
937
938 // Loop over all electrons of this hit
939 // TR photons produce hits with negative charge
940 Int_t nEl = ((Int_t) TMath::Abs(q));
941 for (Int_t iEl = 0; iEl < nEl; iEl++) {
942
943 // Now the real local coordinate system of the ROC
944 // column direction: locC
945 // row direction: locR
946 // time direction: locT
947 // locR and locC are identical to the coordinates of the corresponding
948 // volumina of the drift or amplification region.
949 // locT is defined relative to the wire plane (i.e. middle of amplification
26d3c914 950 // region), meaning locT = 0, and is negative for hits coming from the
625f5260 951 // drift region.
952 Double_t locC = loc[0];
953 Double_t locR = loc[1];
954 Double_t locT = loc[2];
955
956 // Electron attachment
957 if (simParam->ElAttachOn()) {
958 if (gRandom->Rndm() < (absdriftlength * elAttachProp)) {
959 continue;
f881dc35 960 }
625f5260 961 }
962
963 // Apply the diffusion smearing
964 if (simParam->DiffusionOn()) {
965 if (!(Diffusion(driftvelocity,absdriftlength,locR,locC,locT))) {
966 continue;
f881dc35 967 }
f881dc35 968 }
793ff80c 969
625f5260 970 // Apply E x B effects (depends on drift direction)
971 if (commonParam->ExBOn()) {
972 if (!(ExB(driftvelocity,driftlength,locC))) {
4329977a 973 continue;
974 }
729161c5 975 }
976
625f5260 977 // The electron position after diffusion and ExB in pad coordinates.
4329977a 978 // The pad row (z-direction)
625f5260 979 rowE = padPlane->GetPadRowNumberROC(locR);
980 if (rowE < 0) continue;
981 rowOffset = padPlane->GetPadRowOffsetROC(rowE,locR);
4329977a 982
983 // The pad column (rphi-direction)
625f5260 984 offsetTilt = padPlane->GetTiltOffset(rowOffset);
985 colE = padPlane->GetPadColNumber(locC+offsetTilt);
986 if (colE < 0) continue;
987 colOffset = padPlane->GetPadColOffset(colE,locC+offsetTilt);
b65e5048 988
625f5260 989 // Also re-retrieve drift velocity because col and row may have changed
990 driftvelocity = calVdriftDetValue * calVdriftROC->GetValue(colE,rowE);
991 Float_t t0 = calT0DetValue + calT0ROC->GetValue(colE,rowE);
992
993 // Convert the position to drift time [mus], using either constant drift velocity or
994 // time structure of drift cells (non-isochronity, GARFIELD calculation).
995 // Also add absolute time of hits to take pile-up events into account properly
996 Double_t drifttime;
997 if (simParam->TimeStructOn()) {
998 // Get z-position with respect to anode wire
58897a75 999 Double_t zz = row0 - locR + padPlane->GetAnodeWireOffset();
625f5260 1000 zz -= ((Int_t)(2 * zz)) / 2.0;
1001 if (zz > 0.25) {
1002 zz = 0.5 - zz;
1003 }
1004 // Use drift time map (GARFIELD)
a076fc2f 1005 drifttime = commonParam->TimeStruct(driftvelocity,0.5*kAmWidth-1.0*locT,zz)
625f5260 1006 + hittime;
1007 }
1008 else {
1009 // Use constant drift velocity
26d3c914 1010 drifttime = TMath::Abs(locT) / driftvelocity
625f5260 1011 + hittime;
4329977a 1012 }
625f5260 1013
1014 // Apply the gas gain including fluctuations
1015 Double_t ggRndm = 0.0;
1016 do {
1017 ggRndm = gRandom->Rndm();
1018 } while (ggRndm <= 0);
eb52b657 1019 Double_t signal = -(simParam->GetGasGain()) * TMath::Log(ggRndm);
625f5260 1020
1021 // Apply the pad response
1022 if (simParam->PRFOn()) {
1023 // The distance of the electron to the center of the pad
1024 // in units of pad width
1025 Double_t dist = (colOffset - 0.5*padPlane->GetColSize(colE))
1026 / padPlane->GetColSize(colE);
1027 // This is a fixed parametrization, i.e. not dependent on
1028 // calibration values !
053767a4 1029 if (!(calibration->PadResponse(signal,dist,layer,padSignal))) continue;
625f5260 1030 }
1031 else {
1032 padSignal[0] = 0.0;
1033 padSignal[1] = signal;
1034 padSignal[2] = 0.0;
4329977a 1035 }
f881dc35 1036
625f5260 1037 // The time bin (always positive), with t0 distortion
1038 Double_t timeBinIdeal = drifttime * samplingRate + t0;
1039 // Protection
1040 if (TMath::Abs(timeBinIdeal) > 2*nTimeTotal) {
1041 timeBinIdeal = 2 * nTimeTotal;
1042 }
1043 Int_t timeBinTruncated = ((Int_t) timeBinIdeal);
1044 // The distance of the position to the middle of the timebin
1045 Double_t timeOffset = ((Float_t) timeBinTruncated
1046 + 0.5 - timeBinIdeal) / samplingRate;
3551db50 1047
625f5260 1048 // Sample the time response inside the drift region
1049 // + additional time bins before and after.
1050 // The sampling is done always in the middle of the time bin
1051 for (Int_t iTimeBin = TMath::Max(timeBinTruncated,0)
1052 ;iTimeBin < TMath::Min(timeBinTruncated+timeBinTRFend,nTimeTotal)
1053 ;iTimeBin++) {
1054
1055 // Apply the time response
1056 Double_t timeResponse = 1.0;
1057 Double_t crossTalk = 0.0;
1058 Double_t time = (iTimeBin - timeBinTruncated) / samplingRate + timeOffset;
58897a75 1059
625f5260 1060 if (simParam->TRFOn()) {
1061 timeResponse = simParam->TimeResponse(time);
f881dc35 1062 }
625f5260 1063 if (simParam->CTOn()) {
1064 crossTalk = simParam->CrossTalk(time);
f881dc35 1065 }
e23fbb27 1066
625f5260 1067 signalOld[0] = 0.0;
1068 signalOld[1] = 0.0;
1069 signalOld[2] = 0.0;
e23fbb27 1070
625f5260 1071 for (iPad = 0; iPad < kNpad; iPad++) {
f7336fa3 1072
625f5260 1073 Int_t colPos = colE + iPad - 1;
1074 if (colPos < 0) continue;
1075 if (colPos >= nColMax) break;
e23fbb27 1076
625f5260 1077 // Add the signals
b65e5048 1078 signalOld[iPad] = signals->GetData(rowE,colPos,iTimeBin);
e23fbb27 1079
625f5260 1080 if (colPos != colE) {
1081 // Cross talk added to non-central pads
1082 signalOld[iPad] += padSignal[iPad]
1083 * (timeResponse + crossTalk);
1084 }
1085 else {
1086 // W/o cross talk at central pad
1087 signalOld[iPad] += padSignal[iPad]
1088 * timeResponse;
1089 }
f881dc35 1090
b65e5048 1091 signals->SetData(rowE,colPos,iTimeBin,signalOld[iPad]);
625f5260 1092
1093 // Store the track index in the dictionary
1094 // Note: We store index+1 in order to allow the array to be compressed
b65e5048 1095 // Note2: Taking out the +1 in track
625f5260 1096 if (signalOld[iPad] > 0.0) {
1097 for (dict = 0; dict < kNdict; dict++) {
b65e5048 1098 Int_t oldTrack = dictionary[dict]->GetData(rowE,colPos,iTimeBin);
1099 if (oldTrack == track) break;
1100 if (oldTrack == -1 ) {
1101 dictionary[dict]->SetData(rowE,colPos,iTimeBin,track);
1102 break;
1103 }
f881dc35 1104 }
625f5260 1105 }
872a7aba 1106
625f5260 1107 } // Loop: pads
f7336fa3 1108
625f5260 1109 } // Loop: time bins
f7336fa3 1110
625f5260 1111 } // Loop: electrons of a single hit
f7336fa3 1112
625f5260 1113 } // Loop: hits
f7336fa3 1114
625f5260 1115 AliDebug(2,Form("Finished analyzing %d hits",nhit));
e23fbb27 1116
625f5260 1117 return kTRUE;
e23fbb27 1118
625f5260 1119}
793ff80c 1120
625f5260 1121//_____________________________________________________________________________
b65e5048 1122Bool_t AliTRDdigitizer::ConvertSignals(Int_t det, AliTRDarraySignal *signals)
625f5260 1123{
4329977a 1124 //
625f5260 1125 // Convert signals to digits
4329977a 1126 //
1127
625f5260 1128 AliDebug(1,Form("Start converting the signals for detector %d",det));
1129
1130 if (fSDigits) {
1131 // Convert the signal array to s-digits
1132 if (!Signal2SDigits(det,signals)) {
1133 return kFALSE;
793ff80c 1134 }
625f5260 1135 }
1136 else {
1137 // Convert the signal array to digits
1138 if (!Signal2ADC(det,signals)) {
1139 return kFALSE;
793ff80c 1140 }
d295185b 1141 // Run digital processing for digits
1142 RunDigitalProcessing(det);
625f5260 1143 }
f7336fa3 1144
625f5260 1145 // Compress the arrays
b65e5048 1146 CompressOutputArrays(det);
6244debe 1147
625f5260 1148 return kTRUE;
6244debe 1149
625f5260 1150}
4329977a 1151
625f5260 1152//_____________________________________________________________________________
b65e5048 1153Bool_t AliTRDdigitizer::Signal2ADC(Int_t det, AliTRDarraySignal *signals)
625f5260 1154{
1155 //
1156 // Converts the sampled electron signals to ADC values for a given chamber
1157 //
6244debe 1158
625f5260 1159 AliDebug(1,Form("Start converting signals to ADC values for detector=%d",det));
e23fbb27 1160
625f5260 1161 AliTRDcalibDB *calibration = AliTRDcalibDB::Instance();
1162 if (!calibration) {
1163 AliFatal("Could not get calibration object");
1164 return kFALSE;
1165 }
793ff80c 1166
625f5260 1167 AliTRDSimParam *simParam = AliTRDSimParam::Instance();
1168 if (!simParam) {
1169 AliFatal("Could not get simulation parameters");
1170 return kFALSE;
1171 }
f7336fa3 1172
625f5260 1173 // Converts number of electrons to fC
1174 const Double_t kEl2fC = 1.602e-19 * 1.0e15;
0c24ba98 1175
625f5260 1176 // Coupling factor
1177 Double_t coupling = simParam->GetPadCoupling()
1178 * simParam->GetTimeCoupling();
1179 // Electronics conversion factor
1180 Double_t convert = kEl2fC
1181 * simParam->GetChipGain();
1182 // ADC conversion factor
1183 Double_t adcConvert = simParam->GetADCoutRange()
1184 / simParam->GetADCinRange();
1185 // The electronics baseline in mV
1186 Double_t baseline = simParam->GetADCbaseline()
1187 / adcConvert;
1188 // The electronics baseline in electrons
1189 Double_t baselineEl = baseline
1190 / convert;
1191
1192 Int_t row = 0;
1193 Int_t col = 0;
1194 Int_t time = 0;
1195
1196 Int_t nRowMax = fGeo->GetPadPlane(det)->GetNrows();
1197 Int_t nColMax = fGeo->GetPadPlane(det)->GetNcols();
5896bc23 1198 Int_t nTimeTotal = simParam->GetNTimeBins();
abaf1f1d 1199
625f5260 1200 // The gainfactor calibration objects
1201 const AliTRDCalDet *calGainFactorDet = calibration->GetGainFactorDet();
1202 AliTRDCalROC *calGainFactorROC = 0;
1203 Float_t calGainFactorDetValue = 0.0;
f7336fa3 1204
b65e5048 1205 AliTRDarrayADC *digits = 0x0;
e23fbb27 1206
625f5260 1207 if (!signals) {
1208 AliError(Form("Signals array for detector %d does not exist\n",det));
1209 return kFALSE;
1210 }
1211 if (signals->HasData()) {
1212 // Expand the container if neccessary
b65e5048 1213 signals->Expand();
625f5260 1214 }
1215 else {
1216 // Create missing containers
1217 signals->Allocate(nRowMax,nColMax,nTimeTotal);
f7336fa3 1218 }
1219
625f5260 1220 // Get the container for the digits of this detector
1221 if (fDigitsManager->HasSDigits()) {
1222 AliError("Digits manager has s-digits");
1223 return kFALSE;
1224 }
b65e5048 1225
1226 digits = (AliTRDarrayADC *) fDigitsManager->GetDigits(det);
625f5260 1227 // Allocate memory space for the digits buffer
1228 if (!digits->HasData()) {
1229 digits->Allocate(nRowMax,nColMax,nTimeTotal);
0c24ba98 1230 }
1231
625f5260 1232 // Get the calibration objects
1233 calGainFactorROC = calibration->GetGainFactorROC(det);
1234 calGainFactorDetValue = calGainFactorDet->GetValue(det);
abaf1f1d 1235
625f5260 1236 // Create the digits for this chamber
1237 for (row = 0; row < nRowMax; row++ ) {
1238 for (col = 0; col < nColMax; col++ ) {
abaf1f1d 1239
625f5260 1240 // Check whether pad is masked
1241 // Bridged pads are not considered yet!!!
1242 if (calibration->IsPadMasked(det,col,row)) {
1243 continue;
1244 }
abaf1f1d 1245
625f5260 1246 // The gain factors
1247 Float_t padgain = calGainFactorDetValue
1248 * calGainFactorROC->GetValue(col,row);
1249 if (padgain <= 0) {
1250 AliError(Form("Not a valid gain %f, %d %d %d",padgain,det,col,row));
1251 }
abaf1f1d 1252
625f5260 1253 for (time = 0; time < nTimeTotal; time++) {
1254
1255 // Get the signal amplitude
b65e5048 1256 Float_t signalAmp = signals->GetData(row,col,time);
625f5260 1257 // Pad and time coupling
1258 signalAmp *= coupling;
1259 // Gain factors
1260 signalAmp *= padgain;
1261
1262 // Add the noise, starting from minus ADC baseline in electrons
1263 signalAmp = TMath::Max((Double_t) gRandom->Gaus(signalAmp,simParam->GetNoise())
1264 ,-baselineEl);
1265
1266 // Convert to mV
1267 signalAmp *= convert;
1268 // Add ADC baseline in mV
1269 signalAmp += baseline;
1270
1271 // Convert to ADC counts. Set the overflow-bit fADCoutRange if the
1272 // signal is larger than fADCinRange
1273 Short_t adc = 0;
1274 if (signalAmp >= simParam->GetADCinRange()) {
1275 adc = ((Short_t) simParam->GetADCoutRange());
1276 }
1277 else {
1278 adc = TMath::Nint(signalAmp * adcConvert);
1279 }
abaf1f1d 1280
b65e5048 1281 // Saving all digits
1282 digits->SetData(row,col,time,adc);
abaf1f1d 1283
625f5260 1284 } // for: time
b65e5048 1285
625f5260 1286 } // for: col
1287 } // for: row
b1113c6b 1288
625f5260 1289 return kTRUE;
b1113c6b 1290
1291}
1292
1293//_____________________________________________________________________________
b65e5048 1294Bool_t AliTRDdigitizer::Signal2SDigits(Int_t det, AliTRDarraySignal *signals)
abaf1f1d 1295{
1296 //
625f5260 1297 // Converts the sampled electron signals to s-digits
abaf1f1d 1298 //
1299
625f5260 1300 AliDebug(1,Form("Start converting signals to s-digits for detector=%d",det));
abaf1f1d 1301
4329977a 1302 AliTRDcalibDB *calibration = AliTRDcalibDB::Instance();
9afbd7de 1303 if (!calibration) {
4329977a 1304 AliFatal("Could not get calibration object");
3551db50 1305 return kFALSE;
1306 }
6bf5f0ce 1307
625f5260 1308 Int_t row = 0;
1309 Int_t col = 0;
1310 Int_t time = 0;
9afbd7de 1311
625f5260 1312 Int_t nRowMax = fGeo->GetPadPlane(det)->GetNrows();
1313 Int_t nColMax = fGeo->GetPadPlane(det)->GetNcols();
5896bc23 1314 Int_t nTimeTotal = AliTRDSimParam::Instance()->GetNTimeBins();
e23fbb27 1315
625f5260 1316 // Get the container for the digits of this detector
b65e5048 1317
625f5260 1318 if (!fDigitsManager->HasSDigits()) {
1319 AliError("Digits manager has no s-digits");
1320 return kFALSE;
1321 }
b65e5048 1322
1323 AliTRDarraySignal *digits = (AliTRDarraySignal *) fDigitsManager->GetSDigits(det);
625f5260 1324 // Allocate memory space for the digits buffer
1325 if (!digits->HasData()) {
1326 digits->Allocate(nRowMax,nColMax,nTimeTotal);
1327 }
e23fbb27 1328
625f5260 1329 // Create the sdigits for this chamber
1330 for (row = 0; row < nRowMax; row++ ) {
1331 for (col = 0; col < nColMax; col++ ) {
1332 for (time = 0; time < nTimeTotal; time++) {
b65e5048 1333 digits->SetData(row,col,time,signals->GetData(row,col,time));
625f5260 1334 } // for: time
1335 } // for: col
1336 } // for: row
b65e5048 1337
625f5260 1338 return kTRUE;
abaf1f1d 1339
625f5260 1340}
abaf1f1d 1341
625f5260 1342//_____________________________________________________________________________
621310dd 1343Bool_t AliTRDdigitizer::Digits2SDigits(AliTRDdigitsManager * const manDig
1344 , AliTRDdigitsManager * const manSDig)
e7539003 1345{
1346 //
1347 // Converts digits into s-digits. Needed for embedding into real data.
1348 //
1349
1350 AliDebug(1,"Start converting digits to s-digits");
1351
6b4a4228 1352 if (!fGeo) {
1353 fGeo = new AliTRDgeometry();
1354 }
1355
e7539003 1356 AliTRDcalibDB *calibration = AliTRDcalibDB::Instance();
1357 if (!calibration) {
1358 AliFatal("Could not get calibration object");
1359 return kFALSE;
1360 }
1361
1362 AliTRDSimParam *simParam = AliTRDSimParam::Instance();
1363 if (!simParam) {
1364 AliFatal("Could not get simulation parameters");
1365 return kFALSE;
1366 }
1367
1368 // Converts number of electrons to fC
1369 const Double_t kEl2fC = 1.602e-19 * 1.0e15;
1370
1371 // Coupling factor
1372 Double_t coupling = simParam->GetPadCoupling()
1373 * simParam->GetTimeCoupling();
1374 // Electronics conversion factor
1375 Double_t convert = kEl2fC
1376 * simParam->GetChipGain();
1377 // ADC conversion factor
1378 Double_t adcConvert = simParam->GetADCoutRange()
1379 / simParam->GetADCinRange();
1380 // The electronics baseline in mV
1381 Double_t baseline = simParam->GetADCbaseline()
1382 / adcConvert;
1383 // The electronics baseline in electrons
6b4a4228 1384 //Double_t baselineEl = baseline
1385 // / convert;
e7539003 1386
1387 // The gainfactor calibration objects
1388 //const AliTRDCalDet *calGainFactorDet = calibration->GetGainFactorDet();
1389 //AliTRDCalROC *calGainFactorROC = 0;
1390 //Float_t calGainFactorDetValue = 0.0;
1391
1392 Int_t row = 0;
1393 Int_t col = 0;
1394 Int_t time = 0;
1395
1396 for (Int_t det = 0; det < AliTRDgeometry::Ndet(); det++) {
1397
1398 Int_t nRowMax = fGeo->GetPadPlane(det)->GetNrows();
1399 Int_t nColMax = fGeo->GetPadPlane(det)->GetNcols();
5896bc23 1400 Int_t nTimeTotal = manDig->GetDigitsParam()->GetNTimeBins();
e7539003 1401
1402 // Get the calibration objects
1403 //calGainFactorROC = calibration->GetGainFactorROC(det);
1404 //calGainFactorDetValue = calGainFactorDet->GetValue(det);
1405
1406 // Get the digits
1407 AliTRDarrayADC *digits = (AliTRDarrayADC *) manDig->GetDigits(det);
1408
1409 if (!manSDig->HasSDigits()) {
1410 AliError("SDigits manager has no s-digits");
1411 return kFALSE;
1412 }
1413 // Get the s-digits
1414 AliTRDarraySignal *sdigits = (AliTRDarraySignal *) manSDig->GetSDigits(det);
1415 AliTRDarrayDictionary *tracks0 = (AliTRDarrayDictionary *) manSDig->GetDictionary(det,0);
1416 AliTRDarrayDictionary *tracks1 = (AliTRDarrayDictionary *) manSDig->GetDictionary(det,1);
1417 AliTRDarrayDictionary *tracks2 = (AliTRDarrayDictionary *) manSDig->GetDictionary(det,2);
1418 // Allocate memory space for the digits buffer
1419 sdigits->Allocate(nRowMax,nColMax,nTimeTotal);
1420 tracks0->Allocate(nRowMax,nColMax,nTimeTotal);
1421 tracks1->Allocate(nRowMax,nColMax,nTimeTotal);
1422 tracks2->Allocate(nRowMax,nColMax,nTimeTotal);
1423
5896bc23 1424 // Keep the digits param
1425 manSDig->GetDigitsParam()->SetNTimeBins(manDig->GetDigitsParam()->GetNTimeBins());
1426 manSDig->GetDigitsParam()->SetADCbaseline(manDig->GetDigitsParam()->GetADCbaseline());
1427
45d77489 1428 if (digits->HasData()) {
1429
1430 digits->Expand();
1431
1432 // Create the sdigits for this chamber
1433 for (row = 0; row < nRowMax; row++ ) {
1434 for (col = 0; col < nColMax; col++ ) {
1435
1436 // The gain factors
1437 //Float_t padgain = calGainFactorDetValue
1438 // * calGainFactorROC->GetValue(col,row);
1439
1440 for (time = 0; time < nTimeTotal; time++) {
1441
1442 Short_t adcVal = digits->GetData(row,col,time);
1443 Double_t signal = (Double_t) adcVal;
1444 // ADC -> signal in mV
1445 signal /= adcConvert;
1446 // Subtract baseline in mV
1447 signal -= baseline;
1448 // Signal in mV -> signal in #electrons
1449 signal /= convert;
1450 // Gain factor
1451 //signal /= padgain; // Not needed for real data
1452 // Pad and time coupling
1453 signal /= coupling;
1454
1455 sdigits->SetData(row,col,time,signal);
1456 tracks0->SetData(row,col,time,0);
1457 tracks1->SetData(row,col,time,0);
1458 tracks2->SetData(row,col,time,0);
1459
1460 } // for: time
1461
1462 } // for: col
1463 } // for: row
e7539003 1464
45d77489 1465 } // if: has data
1466
e7539003 1467 sdigits->Compress(0);
1468 tracks0->Compress();
1469 tracks1->Compress();
1470 tracks2->Compress();
1471
45d77489 1472 // No compress just remove
1473 manDig->RemoveDigits(det);
1474 manDig->RemoveDictionaries(det);
1475
e7539003 1476 } // for: det
1477
1478 return kTRUE;
1479
1480}
1481
1482//_____________________________________________________________________________
625f5260 1483Bool_t AliTRDdigitizer::SDigits2Digits()
1484{
1485 //
1486 // Merges the input s-digits and converts them to normal digits
1487 //
e23fbb27 1488
625f5260 1489 if (!MergeSDigits()) {
1490 return kFALSE;
1491 }
f7336fa3 1492
625f5260 1493 return ConvertSDigits();
f7336fa3 1494
1495}
1496
1497//_____________________________________________________________________________
abaf1f1d 1498Bool_t AliTRDdigitizer::MergeSDigits()
16bf9884 1499{
1500 //
abaf1f1d 1501 // Merges the input s-digits:
1502 // - The amplitude of the different inputs are summed up.
1503 // - Of the track IDs from the input dictionaries only one is
1504 // kept for each input. This works for maximal 3 different merged inputs.
16bf9884 1505 //
1506
abaf1f1d 1507 // Number of track dictionary arrays
1508 const Int_t kNDict = AliTRDdigitsManager::kNDict;
1509
4d18a639 1510 AliTRDSimParam *simParam = AliTRDSimParam::Instance();
9afbd7de 1511 if (!simParam) {
4329977a 1512 AliFatal("Could not get simulation parameters");
3551db50 1513 return kFALSE;
1514 }
1515
4d18a639 1516 AliTRDcalibDB *calibration = AliTRDcalibDB::Instance();
9afbd7de 1517 if (!calibration) {
4329977a 1518 AliFatal("Could not get calibration object");
3551db50 1519 return kFALSE;
1520 }
1521
abaf1f1d 1522 Int_t iDict = 0;
e23fbb27 1523 Int_t jDict = 0;
abaf1f1d 1524
b65e5048 1525 AliTRDarraySignal *digitsA;
1526 AliTRDarraySignal *digitsB;
1527 AliTRDarrayDictionary *dictionaryA[kNDict];
1528 AliTRDarrayDictionary *dictionaryB[kNDict];
abaf1f1d 1529
b65e5048 1530 AliTRDdigitsManager *mergeSDigitsManager = 0x0;
abaf1f1d 1531 // Get the first s-digits
1532 fSDigitsManager = (AliTRDdigitsManager *) fSDigitsManagerList->First();
9afbd7de 1533 if (!fSDigitsManager) {
7925de54 1534 AliError("No SDigits manager");
9afbd7de 1535 return kFALSE;
1536 }
abaf1f1d 1537
1538 // Loop through the other sets of s-digits
b65e5048 1539 mergeSDigitsManager = (AliTRDdigitsManager *) fSDigitsManagerList->After(fSDigitsManager);
abaf1f1d 1540
9afbd7de 1541 if (mergeSDigitsManager) {
7925de54 1542 AliDebug(1,Form("Merge %d input files.",fSDigitsManagerList->GetSize()));
9afbd7de 1543 }
1544 else {
7925de54 1545 AliDebug(1,"Only one input file.");
abaf1f1d 1546 }
3551db50 1547
5896bc23 1548 Int_t nTimeTotal = fSDigitsManager->GetDigitsParam()->GetNTimeBins();
abaf1f1d 1549 Int_t iMerge = 0;
b65e5048 1550
abaf1f1d 1551 while (mergeSDigitsManager) {
1552
5896bc23 1553 if (mergeSDigitsManager->GetDigitsParam()->GetNTimeBins() != nTimeTotal) {
1554 AliError(Form("Mismatch in the number of time bins [%d,%d]"
1555 ,nTimeTotal
1556 ,mergeSDigitsManager->GetDigitsParam()->GetNTimeBins()));
1557 return kFALSE;
1558 }
1559
abaf1f1d 1560 iMerge++;
5896bc23 1561
abaf1f1d 1562 // Loop through the detectors
1563 for (Int_t iDet = 0; iDet < AliTRDgeometry::Ndet(); iDet++) {
1564
625f5260 1565 Int_t nRowMax = fGeo->GetPadPlane(iDet)->GetNrows();
1566 Int_t nColMax = fGeo->GetPadPlane(iDet)->GetNcols();
b65e5048 1567
abaf1f1d 1568 // Loop through the pixels of one detector and add the signals
b65e5048 1569 digitsA = (AliTRDarraySignal *) fSDigitsManager->GetSDigits(iDet);
1570 digitsB = (AliTRDarraySignal *) mergeSDigitsManager->GetSDigits(iDet);
1571 digitsA->Expand();
1572 if (!digitsA->HasData()) continue;
1573 digitsB->Expand();
1574 if (!digitsB->HasData()) continue;
1575
abaf1f1d 1576 for (iDict = 0; iDict < kNDict; iDict++) {
b65e5048 1577 dictionaryA[iDict] = (AliTRDarrayDictionary *) fSDigitsManager->GetDictionary(iDet,iDict);
1578 dictionaryB[iDict] = (AliTRDarrayDictionary *) mergeSDigitsManager->GetDictionary(iDet,iDict);
1579 dictionaryA[iDict]->Expand();
abaf1f1d 1580 dictionaryB[iDict]->Expand();
1581 }
1582
4487dad0 1583 // Merge only detectors that contain a signal
1584 Bool_t doMerge = kTRUE;
1585 if (fMergeSignalOnly) {
b65e5048 1586 if (digitsA->GetOverThreshold(0) == 0) {
1587 doMerge = kFALSE;
4487dad0 1588 }
abaf1f1d 1589 }
b65e5048 1590
4487dad0 1591 if (doMerge) {
b65e5048 1592
1593 AliDebug(1,Form("Merge detector %d of input no.%d",iDet,iMerge+1));
1594
1595 for (Int_t iRow = 0; iRow < nRowMax; iRow++ ) {
1596 for (Int_t iCol = 0; iCol < nColMax; iCol++ ) {
1597 for (Int_t iTime = 0; iTime < nTimeTotal; iTime++) {
1598
4487dad0 1599 // Add the amplitudes of the summable digits
b65e5048 1600 Float_t ampA = digitsA->GetData(iRow,iCol,iTime);
1601 Float_t ampB = digitsB->GetData(iRow,iCol,iTime);
1602 ampA += ampB;
1603 digitsA->SetData(iRow,iCol,iTime,ampA);
1604
1605 // Add the mask to the track id if defined.
1606 for (iDict = 0; iDict < kNDict; iDict++) {
1607 Int_t trackB = dictionaryB[iDict]->GetData(iRow,iCol,iTime);
1608 if ((fMasks) && (trackB > 0)) {
1609 for (jDict = 0; jDict < kNDict; jDict++) {
1610 Int_t trackA = dictionaryA[iDict]->GetData(iRow,iCol,iTime);
1611 if (trackA == 0) {
1612 trackA = trackB + fMasks[iMerge];
1613 dictionaryA[iDict]->SetData(iRow,iCol,iTime,trackA);
625f5260 1614 } // if: track A == 0
b65e5048 1615 } // for: jDict
1616 } // if: fMasks and trackB > 0
625f5260 1617 } // for: iDict
abaf1f1d 1618
625f5260 1619 } // for: iTime
1620 } // for: iCol
1621 } // for: iRow
4487dad0 1622
625f5260 1623 } // if: doMerge
1624
1625 mergeSDigitsManager->RemoveDigits(iDet);
1626 mergeSDigitsManager->RemoveDictionaries(iDet);
b65e5048 1627
abaf1f1d 1628 if (fCompress) {
b65e5048 1629 digitsA->Compress(0);
1630 for (iDict = 0; iDict < kNDict; iDict++) {
1631 dictionaryA[iDict]->Compress();
abaf1f1d 1632 }
1633 }
b65e5048 1634
625f5260 1635 } // for: detectors
b65e5048 1636
abaf1f1d 1637 // The next set of s-digits
b65e5048 1638 mergeSDigitsManager = (AliTRDdigitsManager *) fSDigitsManagerList->After(mergeSDigitsManager);
1639
625f5260 1640 } // while: mergeDigitsManagers
b65e5048 1641
625f5260 1642 return kTRUE;
1643
1644}
1645
1646//_____________________________________________________________________________
1647Bool_t AliTRDdigitizer::ConvertSDigits()
1648{
1649 //
1650 // Converts s-digits to normal digits
1651 //
1652
b65e5048 1653 AliTRDarraySignal *digitsIn = 0x0;
625f5260 1654
1655 if (!fSDigitsManager->HasSDigits()) {
1656 AliError("No s-digits in digits manager");
1657 return kFALSE;
abaf1f1d 1658 }
1659
625f5260 1660 // Loop through the detectors
1661 for (Int_t det = 0; det < AliTRDgeometry::Ndet(); det++) {
1662
1663 // Get the merged s-digits (signals)
b65e5048 1664 digitsIn = (AliTRDarraySignal *) fSDigitsManager->GetSDigits(det);
625f5260 1665 if (!digitsIn->HasData()) {
1666 AliDebug(2,Form("No digits for det=%d",det));
1667 continue;
1668 }
b0a41e80 1669
625f5260 1670 // Convert the merged sdigits to digits
1671 if (!Signal2ADC(det,digitsIn)) {
1672 continue;
1673 }
1674
1675 // Copy the dictionary information to the output array
1676 if (!CopyDictionary(det)) {
1677 continue;
1678 }
1679
1680 // Delete
1681 fSDigitsManager->RemoveDigits(det);
1682 fSDigitsManager->RemoveDictionaries(det);
1683
d295185b 1684 // Run digital processing
1685 RunDigitalProcessing(det);
1686
625f5260 1687 // Compress the arrays
1688 CompressOutputArrays(det);
1689
1690 } // for: detector numbers
1691
5896bc23 1692 // Save the values for the raw data headers
1693 fDigitsManager->GetDigitsParam()->SetNTimeBins(AliTRDSimParam::Instance()->GetNTimeBins());
1694 fDigitsManager->GetDigitsParam()->SetADCbaseline(AliTRDSimParam::Instance()->GetADCbaseline());
b0a41e80 1695
16bf9884 1696 return kTRUE;
1697
1698}
1699
1700//_____________________________________________________________________________
625f5260 1701Bool_t AliTRDdigitizer::CopyDictionary(Int_t det)
abaf1f1d 1702{
1703 //
625f5260 1704 // Copies the dictionary information from the s-digits arrays
1705 // to the output arrays
abaf1f1d 1706 //
1707
625f5260 1708 AliTRDcalibDB *calibration = AliTRDcalibDB::Instance();
1709 if (!calibration) {
1710 AliFatal("Could not get calibration object");
4d18a639 1711 return kFALSE;
1712 }
abaf1f1d 1713
625f5260 1714 AliDebug(1,Form("Start copying dictionaries for detector=%d",det));
1715
1716 const Int_t kNDict = AliTRDdigitsManager::kNDict;
b65e5048 1717 AliTRDarrayDictionary *dictionaryIn[kNDict];
1718 AliTRDarrayDictionary *dictionaryOut[kNDict];
625f5260 1719
1720 Int_t nRowMax = fGeo->GetPadPlane(det)->GetNrows();
1721 Int_t nColMax = fGeo->GetPadPlane(det)->GetNcols();
5896bc23 1722 Int_t nTimeTotal = AliTRDSimParam::Instance()->GetNTimeBins();
625f5260 1723
1724 Int_t row = 0;
1725 Int_t col = 0;
1726 Int_t time = 0;
1727 Int_t dict = 0;
1728
1729 for (dict = 0; dict < kNDict; dict++) {
1730
b65e5048 1731 dictionaryIn[dict] = (AliTRDarrayDictionary *) fSDigitsManager->GetDictionary(det,dict);
625f5260 1732 dictionaryIn[dict]->Expand();
b65e5048 1733 dictionaryOut[dict] = (AliTRDarrayDictionary *) fDigitsManager->GetDictionary(det,dict);
625f5260 1734 dictionaryOut[dict]->Allocate(nRowMax,nColMax,nTimeTotal);
1735
1736 for (row = 0; row < nRowMax; row++) {
1737 for (col = 0; col < nColMax; col++) {
1738 for (time = 0; time < nTimeTotal; time++) {
b65e5048 1739 Int_t track = dictionaryIn[dict]->GetData(row,col,time);
1740 dictionaryOut[dict]->SetData(row,col,time,track);
625f5260 1741 } // for: time
1742 } // for: col
1743 } // for: row
b65e5048 1744
625f5260 1745 } // for: dictionaries
b65e5048 1746
625f5260 1747 return kTRUE;
1748
1749}
1750
1751//_____________________________________________________________________________
1752void AliTRDdigitizer::CompressOutputArrays(Int_t det)
1753{
1754 //
1755 // Compress the output arrays
1756 //
1757
1758 const Int_t kNDict = AliTRDdigitsManager::kNDict;
b65e5048 1759 AliTRDarrayDictionary *dictionary = 0x0;
625f5260 1760
1761 if (fCompress) {
1762
b65e5048 1763 if (!fSDigits) {
1764 AliTRDarrayADC *digits = 0x0;
1765 digits = (AliTRDarrayADC *) fDigitsManager->GetDigits(det);
1766 digits->Compress();
1767 }
1768
1769 if (fSDigits) {
1770 AliTRDarraySignal *digits = 0x0;
1771 digits = (AliTRDarraySignal *) fDigitsManager->GetSDigits(det);
1772 digits->Compress(0);
1773 }
1774
625f5260 1775 for (Int_t dict = 0; dict < kNDict; dict++) {
b65e5048 1776 dictionary = (AliTRDarrayDictionary *) fDigitsManager->GetDictionary(det,dict);
1777 dictionary->Compress();
625f5260 1778 }
1779
1780 }
abaf1f1d 1781
1782}
1783
1784//_____________________________________________________________________________
0a29d0f1 1785Bool_t AliTRDdigitizer::WriteDigits() const
f7336fa3 1786{
1787 //
1788 // Writes out the TRD-digits and the dictionaries
1789 //
1790
4d18a639 1791 // Write parameters
bdbb05bb 1792 fRunLoader->CdGAFile();
bdbb05bb 1793
da581aea 1794 // Store the digits and the dictionary in the tree
abaf1f1d 1795 return fDigitsManager->WriteDigits();
f7336fa3 1796
1797}
793ff80c 1798
1799//_____________________________________________________________________________
88cb7938 1800void AliTRDdigitizer::InitOutput(Int_t iEvent)
8e64dd77 1801{
1802 //
1803 // Initializes the output branches
1804 //
1805
1806 fEvent = iEvent;
88cb7938 1807
9afbd7de 1808 if (!fRunLoader) {
1809 AliError("Run Loader is NULL");
1810 return;
1811 }
1812
4329977a 1813 AliLoader *loader = fRunLoader->GetLoader("TRDLoader");
9afbd7de 1814 if (!loader) {
1815 AliError("Can not get TRD loader from Run Loader");
1816 return;
1817 }
88cb7938 1818
4d18a639 1819 TTree *tree = 0;
88cb7938 1820
9afbd7de 1821 if (fSDigits) {
1822 // If we produce SDigits
88cb7938 1823 tree = loader->TreeS();
9afbd7de 1824 if (!tree) {
88cb7938 1825 loader->MakeTree("S");
1826 tree = loader->TreeS();
9afbd7de 1827 }
1828 }
1829 else {
1830 // If we produce Digits
1831 tree = loader->TreeD();
1832 if (!tree) {
1833 loader->MakeTree("D");
1834 tree = loader->TreeD();
1835 }
1836 }
88cb7938 1837 fDigitsManager->SetEvent(iEvent);
1838 fDigitsManager->MakeBranch(tree);
8e64dd77 1839
1840}
3551db50 1841
3551db50 1842//_____________________________________________________________________________
a076fc2f 1843Int_t AliTRDdigitizer::Diffusion(Float_t vdrift, Double_t absdriftlength
1844 , Double_t &lRow, Double_t &lCol, Double_t &lTime)
3551db50 1845{
1846 //
a076fc2f 1847 // Applies the diffusion smearing to the position of a single electron.
1848 // Depends on absolute drift length.
3551db50 1849 //
1850
a076fc2f 1851 Float_t diffL = 0.0;
1852 Float_t diffT = 0.0;
4d18a639 1853
a076fc2f 1854 if (AliTRDCommonParam::Instance()->GetDiffCoeff(diffL,diffT,vdrift)) {
3551db50 1855
a076fc2f 1856 Float_t driftSqrt = TMath::Sqrt(absdriftlength);
1857 Float_t sigmaT = driftSqrt * diffT;
1858 Float_t sigmaL = driftSqrt * diffL;
1859 lRow = gRandom->Gaus(lRow ,sigmaT);
1860 lCol = gRandom->Gaus(lCol ,sigmaT * GetLorentzFactor(vdrift));
1861 lTime = gRandom->Gaus(lTime,sigmaL * GetLorentzFactor(vdrift));
4d18a639 1862
a076fc2f 1863 return 1;
7754cd1f 1864
3551db50 1865 }
a076fc2f 1866 else {
3551db50 1867
a076fc2f 1868 return 0;
1b95a37b 1869
3551db50 1870 }
9afbd7de 1871
3551db50 1872}
3551db50 1873
1874//_____________________________________________________________________________
1875Float_t AliTRDdigitizer::GetLorentzFactor(Float_t vd)
1876{
9afbd7de 1877 //
a076fc2f 1878 // Returns the Lorentz factor
9afbd7de 1879 //
1880
a076fc2f 1881 Double_t omegaTau = AliTRDCommonParam::Instance()->GetOmegaTau(vd);
1882 Double_t lorentzFactor = 1.0;
1883 if (AliTRDCommonParam::Instance()->ExBOn()) {
1884 lorentzFactor = 1.0 / (1.0 + omegaTau*omegaTau);
1885 }
4d18a639 1886
a076fc2f 1887 return lorentzFactor;
9afbd7de 1888
3551db50 1889}
1890
1891//_____________________________________________________________________________
4329977a 1892Int_t AliTRDdigitizer::ExB(Float_t vdrift, Double_t driftlength, Double_t &lCol)
3551db50 1893{
1894 //
4329977a 1895 // Applies E x B effects to the position of a single electron.
1896 // Depends on signed drift length.
3551db50 1897 //
4329977a 1898
a076fc2f 1899 lCol = lCol
1900 + AliTRDCommonParam::Instance()->GetOmegaTau(vdrift)
1901 * driftlength;
3551db50 1902
1903 return 1;
9afbd7de 1904
3551db50 1905}
b65e5048 1906
1907//_____________________________________________________________________________
d295185b 1908void AliTRDdigitizer::RunDigitalProcessing(Int_t det)
b65e5048 1909{
1910 //
b0a41e80 1911 // Run the digital processing in the TRAP
b65e5048 1912 //
1913
b0a41e80 1914 AliTRDfeeParam *feeParam = AliTRDfeeParam::Instance();
b65e5048 1915
1916 //Create and initialize the mcm object
b0a41e80 1917 AliTRDmcmSim* mcmfast = new AliTRDmcmSim();
b65e5048 1918
d295185b 1919 AliTRDarrayADC *digits = fDigitsManager->GetDigits(det);
1920 if (!digits)
1921 return;
1922
b65e5048 1923 //Call the methods in the mcm class using the temporary array as input
64e3d742 1924 for(Int_t rob = 0; rob < digits->GetNrow() / 2; rob++)
b0a41e80 1925 {
1926 for(Int_t mcm = 0; mcm < 16; mcm++)
b65e5048 1927 {
b0a41e80 1928 mcmfast->Init(det, rob, mcm);
40bd6ee4 1929 mcmfast->SetData(digits, fDigitsManager);
b65e5048 1930 mcmfast->Filter();
c8b1590d 1931 if (feeParam->GetTracklet()) {
b0a41e80 1932 mcmfast->Tracklet();
c8b1590d 1933 mcmfast->StoreTracklets();
1934 }
b65e5048 1935 mcmfast->ZSMapping();
b0a41e80 1936 mcmfast->WriteData(digits);
b65e5048 1937 }
b0a41e80 1938 }
b65e5048 1939
b65e5048 1940 delete mcmfast;
d295185b 1941
b65e5048 1942}