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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
16/* $Id$ */
17
18///////////////////////////////////////////////////////////////////////////////
19// //
20// Creates and handles digits from TRD hits //
21// Author: C. Blume (C.Blume@gsi.de) //
22// //
23// The following effects are included: //
24// - Diffusion //
25// - ExB effects //
26// - Gas gain including fluctuations //
27// - Pad-response (simple Gaussian approximation) //
28// - Time-response //
29// - Electronics noise //
30// - Electronics gain //
31// - Digitization //
32// - ADC threshold //
33// The corresponding parameter can be adjusted via the various //
34// Set-functions. If these parameters are not explicitly set, default //
35// values are used (see Init-function). //
36// As an example on how to use this class to produce digits from hits //
37// have a look at the macro hits2digits.C //
38// The production of summable digits is demonstrated in hits2sdigits.C //
39// and the subsequent conversion of the s-digits into normal digits is //
40// explained in sdigits2digits.C. //
41// //
42///////////////////////////////////////////////////////////////////////////////
43
44#include <stdlib.h>
45
46#include <TMath.h>
47#include <TVector.h>
48#include <TRandom.h>
49#include <TROOT.h>
50#include <TTree.h>
51#include <TFile.h>
52#include <TF1.h>
53#include <TList.h>
54#include <TTask.h>
55
56#include "AliRun.h"
57#include "AliRunLoader.h"
58#include "AliLoader.h"
59#include "AliConfig.h"
60#include "AliMagF.h"
61#include "AliRunDigitizer.h"
62#include "AliRunLoader.h"
63#include "AliLoader.h"
64
65#include "AliTRD.h"
66#include "AliTRDhit.h"
67#include "AliTRDdigitizer.h"
68#include "AliTRDdataArrayI.h"
69#include "AliTRDdataArrayF.h"
70#include "AliTRDsegmentArray.h"
71#include "AliTRDdigitsManager.h"
72#include "AliTRDgeometry.h"
73#include "AliTRDparameter.h"
74
75ClassImp(AliTRDdigitizer)
76
77//_____________________________________________________________________________
78AliTRDdigitizer::AliTRDdigitizer()
79{
80 //
81 // AliTRDdigitizer default constructor
82 //
83
84 fRunLoader = 0;
85 fDigitsManager = 0;
86 fSDigitsManager = 0;
87 fSDigitsManagerList = 0;
88 fTRD = 0;
89 fGeo = 0;
90 fPar = 0;
91 fEvent = 0;
92 fMasks = 0;
93 fCompress = kTRUE;
94 fDebug = 0;
95 fSDigits = kFALSE;
96 fSDigitsScale = 0.0;
97 fMergeSignalOnly = kFALSE;
98 fSimpleSim = kFALSE;
99 fSimpleDet = 0;
100
101}
102
103//_____________________________________________________________________________
104AliTRDdigitizer::AliTRDdigitizer(const Text_t *name, const Text_t *title)
105 :AliDigitizer(name,title)
106{
107 //
108 // AliTRDdigitizer constructor
109 //
110
111 fRunLoader = 0;
112
113 //NewIO: These data members probably are not needed anymore
114 fDigitsManager = 0;
115 fSDigitsManager = 0;
116 fSDigitsManagerList = 0;
117 fTRD = 0;
118 fGeo = 0;
119 fPar = 0;
120 //End NewIO comment
121 fEvent = 0;
122 fMasks = 0;
123 fCompress = kTRUE;
124 fDebug = 0;
125 fSDigits = kFALSE;
126 fSDigitsScale = 100.; // For the summable digits
127 fMergeSignalOnly = kFALSE;
128 fSimpleSim = kFALSE;
129 fSimpleDet = 0;
130
131
132}
133
134//_____________________________________________________________________________
135AliTRDdigitizer::AliTRDdigitizer(AliRunDigitizer *manager
136 , const Text_t *name, const Text_t *title)
137 :AliDigitizer(manager,name,title)
138{
139 //
140 // AliTRDdigitizer constructor
141 //
142
143 fRunLoader = 0;
144 fDigitsManager = 0;
145 fSDigitsManager = 0;
146 fSDigitsManagerList = 0;
147 fTRD = 0;
148 fGeo = 0;
149 fPar = 0;
150 fEvent = 0;
151 fMasks = 0;
152 fCompress = kTRUE;
153 fDebug = 0;
154 fSDigits = kFALSE;
155 fSDigitsScale = 100.; // For the summable digits
156 fMergeSignalOnly = kFALSE;
157 fSimpleSim = kFALSE;
158 fSimpleDet = 0;
159
160
161}
162
163//_____________________________________________________________________________
164AliTRDdigitizer::AliTRDdigitizer(AliRunDigitizer *manager)
165 :AliDigitizer(manager,"AliTRDdigitizer","TRD digitizer")
166{
167 //
168 // AliTRDdigitizer constructor
169 //
170
171
172 fRunLoader = 0;
173 fDigitsManager = 0;
174 fSDigitsManager = 0;
175 fSDigitsManagerList = 0;
176 fTRD = 0;
177 fGeo = 0;
178 fPar = 0;
179 fEvent = 0;
180 fMasks = 0;
181 fCompress = kTRUE;
182 fDebug = 0;
183 fSDigits = kFALSE;
184 fSDigitsScale = 100.; // For the summable digits
185 fMergeSignalOnly = kFALSE;
186 fSimpleSim = kFALSE;
187 fSimpleDet = 0;
188
189
190}
191
192//_____________________________________________________________________________
193AliTRDdigitizer::AliTRDdigitizer(const AliTRDdigitizer &d):AliDigitizer(d)
194{
195 //
196 // AliTRDdigitizer copy constructor
197 //
198
199 ((AliTRDdigitizer &) d).Copy(*this);
200
201}
202
203//_____________________________________________________________________________
204AliTRDdigitizer::~AliTRDdigitizer()
205{
206 //
207 // AliTRDdigitizer destructor
208 //
209
210
211 if (fDigitsManager) {
212 delete fDigitsManager;
213 fDigitsManager = 0;
214 }
215
216 if (fSDigitsManager) {
217 delete fSDigitsManager;
218 fSDigitsManager = 0;
219 }
220
221 if (fSDigitsManagerList) {
222 delete fSDigitsManagerList;
223 fSDigitsManagerList = 0;
224 }
225
226 if (fMasks) {
227 delete [] fMasks;
228 fMasks = 0;
229 }
230
231}
232
233//_____________________________________________________________________________
234AliTRDdigitizer &AliTRDdigitizer::operator=(const AliTRDdigitizer &d)
235{
236 //
237 // Assignment operator
238 //
239
240 if (this != &d) ((AliTRDdigitizer &) d).Copy(*this);
241 return *this;
242
243}
244
245//_____________________________________________________________________________
246void AliTRDdigitizer::Copy(TObject &d)
247{
248 //
249 // Copy function
250 //
251
252 ((AliTRDdigitizer &) d).fRunLoader = 0;
253 ((AliTRDdigitizer &) d).fDigitsManager = 0;
254 ((AliTRDdigitizer &) d).fSDigitsManager = 0;
255 ((AliTRDdigitizer &) d).fSDigitsManagerList = 0;
256 ((AliTRDdigitizer &) d).fTRD = 0;
257 ((AliTRDdigitizer &) d).fGeo = 0;
258 ((AliTRDdigitizer &) d).fPar = 0;
259 ((AliTRDdigitizer &) d).fEvent = 0;
260 ((AliTRDdigitizer &) d).fMasks = 0;
261 ((AliTRDdigitizer &) d).fCompress = fCompress;
262 ((AliTRDdigitizer &) d).fDebug = fDebug ;
263 ((AliTRDdigitizer &) d).fSDigits = fSDigits;
264 ((AliTRDdigitizer &) d).fSDigitsScale = fSDigitsScale;
265 ((AliTRDdigitizer &) d).fMergeSignalOnly = fMergeSignalOnly;
266 ((AliTRDdigitizer &) d).fSimpleSim = fSimpleSim;
267 ((AliTRDdigitizer &) d).fSimpleDet = fSimpleDet;
268
269}
270
271//_____________________________________________________________________________
272void AliTRDdigitizer::Exec(Option_t* option)
273{
274 //
275 // Executes the merging
276 //
277
278 Int_t iInput;
279
280 AliTRDdigitsManager *sdigitsManager;
281
282 TString optionString = option;
283 if (optionString.Contains("deb")) {
284 fDebug = 1;
285 if (optionString.Contains("2")) {
286 fDebug = 2;
287 }
288 printf("<AliTRDdigitizer::Exec> ");
289 printf("Called with debug option %d\n",fDebug);
290 }
291
292 // The AliRoot file is already connected by the manager
293 AliRunLoader* inrl;
294
295 if (gAlice)
296 {
297 if (fDebug > 0) {
298 printf("<AliTRDdigitizer::Exec> ");
299 printf("AliRun object found on file.\n");
300 }
301 }
302 else {
303 inrl = AliRunLoader::GetRunLoader(fManager->GetInputFolderName(0));
304 inrl->LoadgAlice();
305 gAlice = inrl->GetAliRun();
306 if (!gAlice)
307 {
308 printf("<AliTRDdigitizer::Exec> ");
309 printf("Could not find AliRun object.\n");
310 return;
311 }
312 }
313
314 Int_t nInput = fManager->GetNinputs();
315 fMasks = new Int_t[nInput];
316 for (iInput = 0; iInput < nInput; iInput++) {
317 fMasks[iInput] = fManager->GetMask(iInput);
318 }
319
320 // Initialization
321
322 AliRunLoader* orl = AliRunLoader::GetRunLoader(fManager->GetOutputFolderName());
323 if (InitDetector()) {
324 AliLoader* ogime = orl->GetLoader("TRDLoader");
325
326 TTree* tree = 0;
327 if (fSDigits)
328 {
329 //if we produce SDigits
330 tree = ogime->TreeS();
331 if (!tree)
332 {
333 ogime->MakeTree("S");
334 tree = ogime->TreeS();
335 }
336 }
337 else
338 {//if we produce Digits
339 tree = ogime->TreeD();
340 if (!tree)
341 {
342 ogime->MakeTree("D");
343 tree = ogime->TreeD();
344 }
345 }
346 MakeBranch(tree);
347 }
348
349 for (iInput = 0; iInput < nInput; iInput++) {
350
351 if (fDebug > 0) {
352 printf("<AliTRDdigitizer::Exec> ");
353 printf("Add input stream %d\n",iInput);
354 }
355
356 // check if the input tree exists
357 inrl = AliRunLoader::GetRunLoader(fManager->GetInputFolderName(iInput));
358 AliLoader* gime = inrl->GetLoader("TRDLoader");
359
360 TTree * treees = gime->TreeS();
361 if (treees == 0x0)
362 {
363 if (gime->LoadSDigits())
364 {
365 Error("Exec","Error Occured while loading S. Digits for input %d.",iInput);
366 return;
367 }
368 treees = gime->TreeS();
369 }
370
371 if (treees == 0x0) {
372 printf("<AliTRDdigitizer::Exec> ");
373 printf("Input stream %d does not exist\n",iInput);
374 return;
375 }
376
377 // Read the s-digits via digits manager
378 sdigitsManager = new AliTRDdigitsManager();
379 sdigitsManager->SetDebug(fDebug);
380 sdigitsManager->SetSDigits(kTRUE);
381
382 AliRunLoader* rl = AliRunLoader::GetRunLoader(fManager->GetInputFolderName(iInput));
383 AliLoader* gimme = rl->GetLoader("TRDLoader");
384 if (!gimme->TreeS()) gimme->LoadSDigits();
385 sdigitsManager->ReadDigits(gimme->TreeS());
386
387 // Add the s-digits to the input list
388 AddSDigitsManager(sdigitsManager);
389
390 }
391
392 // Convert the s-digits to normal digits
393 if (fDebug > 0) {
394 printf("<AliTRDdigitizer::Exec> ");
395 printf("Do the conversion\n");
396 }
397 SDigits2Digits();
398
399 // Store the digits
400 if (fDebug > 0) {
401 printf("<AliTRDdigitizer::Exec> ");
402 printf("Write the digits\n");
403 }
404
405 fDigitsManager->WriteDigits();
406
407 //Write parameters
408 orl->CdGAFile();
409 GetParameter()->Write();
410
411 if (fDebug > 0) {
412 printf("<AliTRDdigitizer::Exec> ");
413 printf("Done\n");
414 }
415
416 DeleteSDigitsManager();
417
418}
419
420//_____________________________________________________________________________
421Bool_t AliTRDdigitizer::Open(const Char_t *file, Int_t nEvent)
422{
423 //
424 // Opens a ROOT-file with TRD-hits and reads in the hit-tree
425 //
426
427 // Connect the AliRoot file containing Geometry, Kine, and Hits
428
429 fRunLoader = AliRunLoader::Open(file,AliConfig::fgkDefaultEventFolderName,
430 "UPDATE");
431
432 if (!fRunLoader)
433 {
434 Error("Open","Can not open session for file %s.",file);
435 return kFALSE;
436 }
437
438 fRunLoader->LoadgAlice();
439 gAlice = fRunLoader->GetAliRun();
440
441 if (gAlice) {
442 if (fDebug > 0) {
443 printf("<AliTRDdigitizer::Open> ");
444 printf("AliRun object found on file.\n");
445 }
446 }
447 else {
448 printf("<AliTRDdigitizer::Open> ");
449 printf("Could not find AliRun object.\n");
450 return kFALSE;
451 }
452
453 fEvent = nEvent;
454
455 // Import the Trees for the event nEvent in the file
456 fRunLoader->GetEvent(fEvent);
457
458 AliLoader* loader = fRunLoader->GetLoader("TRDLoader");
459 if (!loader)
460 {
461 Error("Open","Can not get TRD loader from Run Loader");
462 return kFALSE;
463 }
464
465 if (InitDetector()) {
466 TTree* tree = 0;
467 if (fSDigits)
468 {
469 //if we produce SDigits
470 tree = loader->TreeS();
471 if (!tree)
472 {
473 loader->MakeTree("S");
474 tree = loader->TreeS();
475 }
476 }
477 else
478 {//if we produce Digits
479 tree = loader->TreeD();
480 if (!tree)
481 {
482 loader->MakeTree("D");
483 tree = loader->TreeD();
484 }
485 }
486 return MakeBranch(tree);
487 }
488 else {
489 return kFALSE;
490 }
491
492}
493
494//_____________________________________________________________________________
495Bool_t AliTRDdigitizer::InitDetector()
496{
497 //
498 // Sets the pointer to the TRD detector and the geometry
499 //
500
501 // Get the pointer to the detector class and check for version 1
502 fTRD = (AliTRD *) gAlice->GetDetector("TRD");
503 if (!fTRD) {
504 printf("<AliTRDdigitizer::InitDetector> ");
505 printf("No TRD module found\n");
506 exit(1);
507 }
508 if (fTRD->IsVersion() != 1) {
509 printf("<AliTRDdigitizer::InitDetector> ");
510 printf("TRD must be version 1 (slow simulator).\n");
511 exit(1);
512 }
513
514 // Get the geometry
515 fGeo = fTRD->GetGeometry();
516 if (fDebug > 0) {
517 printf("<AliTRDdigitizer::InitDetector> ");
518 printf("Geometry version %d\n",fGeo->IsVersion());
519 }
520
521 // Create a digits manager
522 fDigitsManager = new AliTRDdigitsManager();
523 fDigitsManager->SetSDigits(fSDigits);
524 fDigitsManager->CreateArrays();
525 fDigitsManager->SetEvent(fEvent);
526 fDigitsManager->SetDebug(fDebug);
527
528 // The list for the input s-digits manager to be merged
529 fSDigitsManagerList = new TList();
530
531 return kTRUE;
532
533}
534
535//_____________________________________________________________________________
536Bool_t AliTRDdigitizer::MakeBranch(TTree* tree) const
537{
538 //
539 // Create the branches for the digits array
540 //
541
542 return fDigitsManager->MakeBranch(tree);
543
544}
545
546//_____________________________________________________________________________
547Bool_t AliTRDdigitizer::MakeDigits()
548{
549 //
550 // Creates digits.
551 //
552
553 ///////////////////////////////////////////////////////////////
554 // Parameter
555 ///////////////////////////////////////////////////////////////
556
557 // Converts number of electrons to fC
558 const Double_t kEl2fC = 1.602E-19 * 1.0E15;
559
560 ///////////////////////////////////////////////////////////////
561
562 // Number of pads included in the pad response
563 const Int_t kNpad = 3;
564
565 // Number of track dictionary arrays
566 const Int_t kNDict = AliTRDdigitsManager::kNDict;
567
568 // Half the width of the amplification region
569 const Float_t kAmWidth = AliTRDgeometry::AmThick() / 2.;
570
571 Int_t iRow, iCol, iTime, iPad;
572 Int_t iDict = 0;
573 Int_t nBytes = 0;
574
575 Int_t totalSizeDigits = 0;
576 Int_t totalSizeDict0 = 0;
577 Int_t totalSizeDict1 = 0;
578 Int_t totalSizeDict2 = 0;
579
580 Int_t timeTRDbeg = 0;
581 Int_t timeTRDend = 1;
582
583 Float_t pos[3];
584 Float_t rot[3];
585 Float_t xyz[3];
586 Float_t padSignal[kNpad];
587 Float_t signalOld[kNpad];
588
589 AliTRDdataArrayF *signals = 0;
590 AliTRDdataArrayI *digits = 0;
591 AliTRDdataArrayI *dictionary[kNDict];
592
593 // Create a default parameter class if none is defined
594 if (!fPar) {
595 fPar = new AliTRDparameter("TRDparameter","Standard TRD parameter");
596 if (fDebug > 0) {
597 printf("<AliTRDdigitizer::MakeDigits> ");
598 printf("Create the default parameter object\n");
599 }
600 }
601
602 // Create a container for the amplitudes
603 AliTRDsegmentArray *signalsArray
604 = new AliTRDsegmentArray("AliTRDdataArrayF"
605 ,AliTRDgeometry::Ndet());
606
607 if (fPar->TRFOn()) {
608 timeTRDbeg = ((Int_t) (-fPar->GetTRFlo() / fPar->GetTimeBinSize())) - 1;
609 timeTRDend = ((Int_t) ( fPar->GetTRFhi() / fPar->GetTimeBinSize())) - 1;
610 if (fDebug > 0) {
611 printf("<AliTRDdigitizer::MakeDigits> ");
612 printf("Sample the TRF between -%d and %d\n",timeTRDbeg,timeTRDend);
613 }
614 }
615
616 Float_t elAttachProp = fPar->GetElAttachProp() / 100.;
617
618 if (!fGeo) {
619 printf("<AliTRDdigitizer::MakeDigits> ");
620 printf("No geometry defined\n");
621 return kFALSE;
622 }
623
624 if (fDebug > 0) {
625 printf("<AliTRDdigitizer::MakeDigits> ");
626 printf("Start creating digits.\n");
627 }
628
629 AliLoader* gimme = fRunLoader->GetLoader("TRDLoader");
630 if (!gimme->TreeH()) gimme->LoadHits();
631 TTree* hitTree = gimme->TreeH();
632 if (hitTree == 0x0)
633 {
634 Error("MakeDigits","Can not get TreeH");
635 return kFALSE;
636 }
637 fTRD->SetTreeAddress();
638
639 // Get the number of entries in the hit tree
640 // (Number of primary particles creating a hit somewhere)
641 Int_t nTrack = 1;
642 if (!fSimpleSim) {
643 nTrack = (Int_t) hitTree->GetEntries();
644 if (fDebug > 0) {
645 printf("<AliTRDdigitizer::MakeDigits> ");
646 printf("Found %d primary particles\n",nTrack);
647 }
648 }
649
650 Int_t detectorOld = -1;
651 Int_t countHits = 0;
652
653 // Loop through all entries in the tree
654 for (Int_t iTrack = 0; iTrack < nTrack; iTrack++) {
655
656 if (!fSimpleSim) {
657 gAlice->ResetHits();
658 nBytes += hitTree->GetEvent(iTrack);
659 }
660
661 // Loop through the TRD hits
662 Int_t iHit = 0;
663 AliTRDhit *hit = (AliTRDhit *) fTRD->FirstHit(-1);
664 while (hit) {
665
666 countHits++;
667 iHit++;
668
669 pos[0] = hit->X();
670 pos[1] = hit->Y();
671 pos[2] = hit->Z();
672 Float_t q = hit->GetCharge();
673 Int_t track = hit->Track();
674 Int_t detector = hit->GetDetector();
675 Int_t plane = fGeo->GetPlane(detector);
676 Int_t sector = fGeo->GetSector(detector);
677 Int_t chamber = fGeo->GetChamber(detector);
678 Int_t nRowMax = fPar->GetRowMax(plane,chamber,sector);
679 Int_t nColMax = fPar->GetColMax(plane);
680 Int_t nTimeMax = fPar->GetTimeMax();
681 Int_t nTimeBefore = fPar->GetTimeBefore();
682 Int_t nTimeAfter = fPar->GetTimeAfter();
683 Int_t nTimeTotal = fPar->GetTimeTotal();
684 Float_t row0 = fPar->GetRow0(plane,chamber,sector);
685 Float_t col0 = fPar->GetCol0(plane);
686 Float_t time0 = fPar->GetTime0(plane);
687 Float_t rowPadSize = fPar->GetRowPadSize(plane,chamber,sector);
688 Float_t colPadSize = fPar->GetColPadSize(plane);
689 Float_t timeBinSize = fPar->GetTimeBinSize();
690 Float_t divideRow = 1.0 / rowPadSize;
691 Float_t divideCol = 1.0 / colPadSize;
692 Float_t divideTime = 1.0 / timeBinSize;
693
694 if (fDebug > 1) {
695 printf("Analyze hit no. %d ",iHit);
696 printf("-----------------------------------------------------------\n");
697 hit->Dump();
698 printf("plane = %d, sector = %d, chamber = %d\n"
699 ,plane,sector,chamber);
700 printf("nRowMax = %d, nColMax = %d, nTimeMax = %d\n"
701 ,nRowMax,nColMax,nTimeMax);
702 printf("nTimeBefore = %d, nTimeAfter = %d, nTimeTotal = %d\n"
703 ,nTimeBefore,nTimeAfter,nTimeTotal);
704 printf("row0 = %f, col0 = %f, time0 = %f\n"
705 ,row0,col0,time0);
706 printf("rowPadSize = %f, colPadSize = %f, timeBinSize = %f\n"
707 ,rowPadSize,colPadSize,timeBinSize);
708 }
709
710 // Don't analyze test hits and switched off detectors
711 if ((CheckDetector(plane,chamber,sector)) &&
712 (((Int_t) q) != 0)) {
713
714 if (detector != detectorOld) {
715
716 if (fDebug > 1) {
717 printf("<AliTRDdigitizer::MakeDigits> ");
718 printf("Get new container. New det = %d, Old det = %d\n"
719 ,detector,detectorOld);
720 }
721 // Compress the old one if enabled
722 if ((fCompress) && (detectorOld > -1)) {
723 if (fDebug > 1) {
724 printf("<AliTRDdigitizer::MakeDigits> ");
725 printf("Compress the old container ...");
726 }
727 signals->Compress(1,0);
728 for (iDict = 0; iDict < kNDict; iDict++) {
729 dictionary[iDict]->Compress(1,0);
730 }
731 if (fDebug > 1) printf("done\n");
732 }
733 // Get the new container
734 signals = (AliTRDdataArrayF *) signalsArray->At(detector);
735 if (signals->GetNtime() == 0) {
736 // Allocate a new one if not yet existing
737 if (fDebug > 1) {
738 printf("<AliTRDdigitizer::MakeDigits> ");
739 printf("Allocate a new container ... ");
740 }
741 signals->Allocate(nRowMax,nColMax,nTimeTotal);
742 }
743 else if (fSimpleSim) {
744 // Clear an old one for the simple simulation
745 if (fDebug > 1) {
746 printf("<AliTRDdigitizer::MakeDigits> ");
747 printf("Clear a old container ... ");
748 }
749 signals->Clear();
750 }
751 else {
752 // Expand an existing one
753 if (fCompress) {
754 if (fDebug > 1) {
755 printf("<AliTRDdigitizer::MakeDigits> ");
756 printf("Expand an existing container ... ");
757 }
758 signals->Expand();
759 }
760 }
761 // The same for the dictionary
762 if (!fSimpleSim) {
763 for (iDict = 0; iDict < kNDict; iDict++) {
764 dictionary[iDict] = fDigitsManager->GetDictionary(detector,iDict);
765 if (dictionary[iDict]->GetNtime() == 0) {
766 dictionary[iDict]->Allocate(nRowMax,nColMax,nTimeTotal);
767 }
768 else {
769 if (fCompress) dictionary[iDict]->Expand();
770 }
771 }
772 }
773 if (fDebug > 1) printf("done\n");
774 detectorOld = detector;
775 }
776
777 // Rotate the sectors on top of each other
778 if (fSimpleSim) {
779 rot[0] = pos[0];
780 rot[1] = pos[1];
781 rot[2] = pos[2];
782 }
783 else {
784 fGeo->Rotate(detector,pos,rot);
785 }
786
787 // The driftlength. It is negative if the hit is in the
788 // amplification region.
789 Float_t driftlength = time0 - rot[0];
790
791 // Take also the drift in the amplification region into account
792 // The drift length is at the moment still the same, regardless of
793 // the position relativ to the wire. This non-isochronity needs still
794 // to be implemented.
795 Float_t driftlengthL = TMath::Abs(driftlength + kAmWidth);
796 if (fPar->ExBOn()) driftlengthL /= TMath::Sqrt(fPar->GetLorentzFactor());
797
798 // Loop over all electrons of this hit
799 // TR photons produce hits with negative charge
800 Int_t nEl = ((Int_t) TMath::Abs(q));
801 for (Int_t iEl = 0; iEl < nEl; iEl++) {
802
803 xyz[0] = rot[0];
804 xyz[1] = rot[1];
805 xyz[2] = rot[2];
806
807 // Electron attachment
808 if (fPar->ElAttachOn()) {
809 if (gRandom->Rndm() < (driftlengthL * elAttachProp))
810 continue;
811 }
812
813 // Apply the diffusion smearing
814 if (fPar->DiffusionOn()) {
815 if (!(fPar->Diffusion(driftlengthL,xyz))) continue;
816 }
817
818 // Apply E x B effects (depends on drift direction)
819 if (fPar->ExBOn()) {
820 if (!(fPar->ExB(driftlength+kAmWidth,xyz))) continue;
821 }
822
823 // The electron position after diffusion and ExB in pad coordinates
824 // The pad row (z-direction)
825 Float_t rowDist = xyz[2] - row0;
826 Int_t rowE = ((Int_t) (rowDist * divideRow));
827 if ((rowE < 0) || (rowE >= nRowMax)) continue;
828 Float_t rowOffset = ((((Float_t) rowE) + 0.5) * rowPadSize) - rowDist;
829
830 // The pad column (rphi-direction)
831 Float_t col0tilt = fPar->Col0Tilted(col0,rowOffset,plane);
832 Float_t colDist = xyz[1] - col0tilt;
833 Int_t colE = ((Int_t) (colDist * divideCol));
834 if ((colE < 0) || (colE >= nColMax)) continue;
835 Float_t colOffset = ((((Float_t) colE) + 0.5) * colPadSize) - colDist;
836
837 // The time bin (negative for hits in the amplification region)
838 // In the amplification region the electrons drift from both sides
839 // to the middle (anode wire plane)
840 Float_t timeDist = time0 - xyz[0];
841 Float_t timeOffset = 0;
842 Int_t timeE = 0;
843 if (timeDist > 0) {
844 // The time bin
845 timeE = ((Int_t) (timeDist * divideTime));
846 // The distance of the position to the middle of the timebin
847 timeOffset = ((((Float_t) timeE) + 0.5) * timeBinSize) - timeDist;
848 }
849 else {
850 // Difference between half of the amplification gap width and
851 // the distance to the anode wire
852 Float_t anodeDist = kAmWidth - TMath::Abs(timeDist + kAmWidth);
853 // The time bin
854 timeE = -1 * (((Int_t ) (anodeDist * divideTime)) + 1);
855 // The distance of the position to the middle of the timebin
856 timeOffset = ((((Float_t) timeE) + 0.5) * timeBinSize) + anodeDist;
857 }
858
859 // Apply the gas gain including fluctuations
860 Float_t ggRndm = 0.0;
861 do {
862 ggRndm = gRandom->Rndm();
863 } while (ggRndm <= 0);
864 Int_t signal = (Int_t) (-fPar->GetGasGain() * TMath::Log(ggRndm));
865
866 // Apply the pad response
867 if (fPar->PRFOn()) {
868 // The distance of the electron to the center of the pad
869 // in units of pad width
870 Float_t dist = - colOffset * divideCol;
871 if (!(fPar->PadResponse(signal,dist,plane,padSignal))) continue;
872 }
873 else {
874 padSignal[0] = 0.0;
875 padSignal[1] = signal;
876 padSignal[2] = 0.0;
877 }
878
879 // Sample the time response inside the drift region
880 // + additional time bins before and after.
881 // The sampling is done always in the middle of the time bin
882 for (Int_t iTimeBin = TMath::Max(timeE-timeTRDbeg, -nTimeBefore)
883 ;iTimeBin < TMath::Min(timeE+timeTRDend,nTimeMax+nTimeAfter )
884 ;iTimeBin++) {
885
886 // Apply the time response
887 Float_t timeResponse = 1.0;
888 Float_t crossTalk = 0.0;
889 Float_t time = (iTimeBin - timeE) * timeBinSize + timeOffset;
890 if (fPar->TRFOn()) {
891 timeResponse = fPar->TimeResponse(time);
892 }
893 if (fPar->CTOn()) {
894 crossTalk = fPar->CrossTalk(time);
895 }
896
897 signalOld[0] = 0.0;
898 signalOld[1] = 0.0;
899 signalOld[2] = 0.0;
900
901 for (iPad = 0; iPad < kNpad; iPad++) {
902
903 Int_t colPos = colE + iPad - 1;
904 if (colPos < 0) continue;
905 if (colPos >= nColMax) break;
906
907 // Add the signals
908 // Note: The time bin number is shifted by nTimeBefore to avoid negative
909 // time bins. This has to be subtracted later.
910 Int_t iCurrentTimeBin = iTimeBin + nTimeBefore;
911 signalOld[iPad] = signals->GetDataUnchecked(rowE,colPos,iCurrentTimeBin);
912 if( colPos != colE ) {
913 signalOld[iPad] += padSignal[iPad] * (timeResponse + crossTalk);
914 }
915 else {
916 signalOld[iPad] += padSignal[iPad] * timeResponse;
917 }
918 signals->SetDataUnchecked(rowE,colPos,iCurrentTimeBin,signalOld[iPad]);
919
920 // Store the track index in the dictionary
921 // Note: We store index+1 in order to allow the array to be compressed
922 if ((signalOld[iPad] > 0) && (!fSimpleSim)) {
923 for (iDict = 0; iDict < kNDict; iDict++) {
924 Int_t oldTrack = dictionary[iDict]->GetDataUnchecked(rowE
925 ,colPos
926 ,iCurrentTimeBin);
927 if (oldTrack == track+1) break;
928 if (oldTrack == 0) {
929 dictionary[iDict]->SetDataUnchecked(rowE,colPos,iCurrentTimeBin,track+1);
930 break;
931 }
932 }
933 }
934
935 } // Loop: pads
936
937 } // Loop: time bins
938
939 } // Loop: electrons of a single hit
940
941 } // If: detector and test hit
942
943 hit = (AliTRDhit *) fTRD->NextHit();
944
945 } // Loop: hits of one primary track
946
947 } // Loop: primary tracks
948
949 if (fDebug > 0) {
950 printf("<AliTRDdigitizer::MakeDigits> ");
951 printf("Finished analyzing %d hits\n",countHits);
952 }
953
954 // The coupling factor
955 Float_t coupling = fPar->GetPadCoupling()
956 * fPar->GetTimeCoupling();
957
958 // The conversion factor
959 Float_t convert = kEl2fC
960 * fPar->GetChipGain();
961
962 // Loop through all chambers to finalize the digits
963 Int_t iDetBeg = 0;
964 Int_t iDetEnd = AliTRDgeometry::Ndet();
965 if (fSimpleSim) {
966 iDetBeg = fSimpleDet;
967 iDetEnd = iDetBeg + 1;
968 }
969 for (Int_t iDet = iDetBeg; iDet < iDetEnd; iDet++) {
970
971 Int_t plane = fGeo->GetPlane(iDet);
972 Int_t sector = fGeo->GetSector(iDet);
973 Int_t chamber = fGeo->GetChamber(iDet);
974 Int_t nRowMax = fPar->GetRowMax(plane,chamber,sector);
975 Int_t nColMax = fPar->GetColMax(plane);
976 Int_t nTimeMax = fPar->GetTimeMax();
977 Int_t nTimeTotal = fPar->GetTimeTotal();
978
979 Double_t *inADC = new Double_t[nTimeTotal];
980 Double_t *outADC = new Double_t[nTimeTotal];
981
982 if (fDebug > 0) {
983 printf("<AliTRDdigitizer::MakeDigits> ");
984 printf("Digitization for chamber %d\n",iDet);
985 }
986
987 // Add a container for the digits of this detector
988 digits = fDigitsManager->GetDigits(iDet);
989 // Allocate memory space for the digits buffer
990 if (digits->GetNtime() == 0) {
991 digits->Allocate(nRowMax,nColMax,nTimeTotal);
992 }
993 else if (fSimpleSim) {
994 digits->Clear();
995 }
996
997 // Get the signal container
998 signals = (AliTRDdataArrayF *) signalsArray->At(iDet);
999 if (signals->GetNtime() == 0) {
1000 // Create missing containers
1001 signals->Allocate(nRowMax,nColMax,nTimeTotal);
1002 }
1003 else {
1004 // Expand the container if neccessary
1005 if (fCompress) signals->Expand();
1006 }
1007 // Create the missing dictionary containers
1008 if (!fSimpleSim) {
1009 for (iDict = 0; iDict < kNDict; iDict++) {
1010 dictionary[iDict] = fDigitsManager->GetDictionary(iDet,iDict);
1011 if (dictionary[iDict]->GetNtime() == 0) {
1012 dictionary[iDict]->Allocate(nRowMax,nColMax,nTimeTotal);
1013 }
1014 }
1015 }
1016
1017 Int_t nDigits = 0;
1018
1019 // Don't create noise in detectors that are switched off
1020 if (CheckDetector(plane,chamber,sector)) {
1021
1022 // Create the digits for this chamber
1023 for (iRow = 0; iRow < nRowMax; iRow++ ) {
1024 for (iCol = 0; iCol < nColMax; iCol++ ) {
1025
1026 // Create summable digits
1027 if (fSDigits) {
1028
1029 for (iTime = 0; iTime < nTimeTotal; iTime++) {
1030 Float_t signalAmp = signals->GetDataUnchecked(iRow,iCol,iTime);
1031 signalAmp *= fSDigitsScale;
1032 signalAmp = TMath::Min(signalAmp,(Float_t) 1.0e9);
1033 Int_t adc = (Int_t) signalAmp;
1034 if (adc > 0) nDigits++;
1035 digits->SetDataUnchecked(iRow,iCol,iTime,adc);
1036 }
1037
1038 }
1039 // Create normal digits
1040 else {
1041
1042 for (iTime = 0; iTime < nTimeTotal; iTime++) {
1043 Float_t signalAmp = signals->GetDataUnchecked(iRow,iCol,iTime);
1044 // Pad and time coupling
1045 signalAmp *= coupling;
1046 // Add the noise, starting from minus ADC baseline in electrons
1047 Double_t baselineEl = fPar->GetADCbaseline() * (fPar->GetADCinRange()
1048 / fPar->GetADCoutRange())
1049 / convert;
1050 signalAmp = TMath::Max((Double_t) gRandom->Gaus(signalAmp,fPar->GetNoise())
1051 ,-baselineEl);
1052 // Convert to mV
1053 signalAmp *= convert;
1054 // Add ADC baseline in mV
1055 signalAmp += fPar->GetADCbaseline() * (fPar->GetADCinRange()
1056 / fPar->GetADCoutRange());
1057 // Convert to ADC counts. Set the overflow-bit fADCoutRange if the
1058 // signal is larger than fADCinRange
1059 Int_t adc = 0;
1060 if (signalAmp >= fPar->GetADCinRange()) {
1061 adc = ((Int_t) fPar->GetADCoutRange());
1062 }
1063 else {
1064 adc = ((Int_t) (signalAmp * (fPar->GetADCoutRange()
1065 / fPar->GetADCinRange())));
1066 }
1067 inADC[iTime] = adc;
1068 outADC[iTime] = adc;
1069 }
1070
1071 // Apply the tail cancelation via the digital filter
1072 if (fPar->TCOn()) {
1073 DeConvExp(inADC,outADC,nTimeTotal,fPar->GetTCnexp());
1074 }
1075
1076 for (iTime = 0; iTime < nTimeTotal; iTime++) {
1077 // Store the amplitude of the digit if above threshold
1078 if (outADC[iTime] > fPar->GetADCthreshold()) {
1079 if (fDebug > 2) {
1080 printf(" iRow = %d, iCol = %d, iTime = %d, adc = %f\n"
1081 ,iRow,iCol,iTime,outADC[iTime]);
1082 }
1083 nDigits++;
1084 digits->SetDataUnchecked(iRow,iCol,iTime,((Int_t) outADC[iTime]));
1085 }
1086 }
1087
1088 }
1089
1090 }
1091 }
1092
1093 }
1094
1095 // Compress the arrays
1096 if (!fSimpleSim) {
1097 digits->Compress(1,0);
1098 for (iDict = 0; iDict < kNDict; iDict++) {
1099 dictionary[iDict]->Compress(1,0);
1100 }
1101
1102 totalSizeDigits += digits->GetSize();
1103 totalSizeDict0 += dictionary[0]->GetSize();
1104 totalSizeDict1 += dictionary[1]->GetSize();
1105 totalSizeDict2 += dictionary[2]->GetSize();
1106
1107 Float_t nPixel = nRowMax * nColMax * nTimeMax;
1108 if (fDebug > 0) {
1109 printf("<AliTRDdigitizer::MakeDigits> ");
1110 printf("Found %d digits in detector %d (%3.0f).\n"
1111 ,nDigits,iDet
1112 ,100.0 * ((Float_t) nDigits) / nPixel);
1113 }
1114
1115 if (fCompress) signals->Compress(1,0);
1116
1117 }
1118
1119 delete [] inADC;
1120 delete [] outADC;
1121
1122 }
1123
1124 if (signalsArray) {
1125 delete signalsArray;
1126 signalsArray = 0;
1127 }
1128
1129 if (fDebug > 0) {
1130 printf("<AliTRDdigitizer::MakeDigits> ");
1131 printf("Total number of analyzed hits = %d\n",countHits);
1132 if (!fSimpleSim) {
1133 printf("<AliTRDdigitizer::MakeDigits> ");
1134 printf("Total digits data size = %d, %d, %d, %d\n",totalSizeDigits
1135 ,totalSizeDict0
1136 ,totalSizeDict1
1137 ,totalSizeDict2);
1138 }
1139 }
1140
1141 return kTRUE;
1142
1143}
1144
1145//_____________________________________________________________________________
1146void AliTRDdigitizer::AddSDigitsManager(AliTRDdigitsManager *man)
1147{
1148 //
1149 // Add a digits manager for s-digits to the input list.
1150 //
1151
1152 fSDigitsManagerList->Add(man);
1153
1154}
1155
1156//_____________________________________________________________________________
1157void AliTRDdigitizer::DeleteSDigitsManager()
1158{
1159 //
1160 // Removes digits manager from the input list.
1161 //
1162
1163 fSDigitsManagerList->Delete();
1164
1165}
1166
1167//_____________________________________________________________________________
1168Bool_t AliTRDdigitizer::ConvertSDigits()
1169{
1170 //
1171 // Converts s-digits to normal digits
1172 //
1173
1174 // Number of track dictionary arrays
1175 const Int_t kNDict = AliTRDdigitsManager::kNDict;
1176
1177 // Converts number of electrons to fC
1178 const Double_t kEl2fC = 1.602E-19 * 1.0E15;
1179
1180 Int_t iDict = 0;
1181 Int_t iRow;
1182 Int_t iCol;
1183 Int_t iTime;
1184
1185 if (!fPar) {
1186 fPar = new AliTRDparameter("TRDparameter","Standard parameter");
1187 if (fDebug > 0) {
1188 printf("<AliTRDdigitizer::ConvertSDigits> ");
1189 printf("Create the default parameter object\n");
1190 }
1191 }
1192
1193 Double_t sDigitsScale = 1.0 / GetSDigitsScale();
1194 Double_t noise = fPar->GetNoise();
1195 Double_t padCoupling = fPar->GetPadCoupling();
1196 Double_t timeCoupling = fPar->GetTimeCoupling();
1197 Double_t chipGain = fPar->GetChipGain();
1198 Double_t coupling = padCoupling * timeCoupling;
1199 Double_t convert = kEl2fC * chipGain;
1200 Double_t adcInRange = fPar->GetADCinRange();
1201 Double_t adcOutRange = fPar->GetADCoutRange();
1202 Int_t adcThreshold = fPar->GetADCthreshold();
1203 Int_t adcBaseline = fPar->GetADCbaseline();
1204
1205 AliTRDdataArrayI *digitsIn;
1206 AliTRDdataArrayI *digitsOut;
1207 AliTRDdataArrayI *dictionaryIn[kNDict];
1208 AliTRDdataArrayI *dictionaryOut[kNDict];
1209
1210 // Loop through the detectors
1211 for (Int_t iDet = 0; iDet < AliTRDgeometry::Ndet(); iDet++) {
1212
1213 if (fDebug > 0) {
1214 printf("<AliTRDdigitizer::ConvertSDigits> ");
1215 printf("Convert detector %d to digits.\n",iDet);
1216 }
1217
1218 Int_t plane = fGeo->GetPlane(iDet);
1219 Int_t sector = fGeo->GetSector(iDet);
1220 Int_t chamber = fGeo->GetChamber(iDet);
1221 Int_t nRowMax = fPar->GetRowMax(plane,chamber,sector);
1222 Int_t nColMax = fPar->GetColMax(plane);
1223 Int_t nTimeTotal = fPar->GetTimeTotal();
1224
1225 Double_t *inADC = new Double_t[nTimeTotal];
1226 Double_t *outADC = new Double_t[nTimeTotal];
1227
1228 digitsIn = fSDigitsManager->GetDigits(iDet);
1229 digitsIn->Expand();
1230 digitsOut = fDigitsManager->GetDigits(iDet);
1231 digitsOut->Allocate(nRowMax,nColMax,nTimeTotal);
1232 for (iDict = 0; iDict < kNDict; iDict++) {
1233 dictionaryIn[iDict] = fSDigitsManager->GetDictionary(iDet,iDict);
1234 dictionaryIn[iDict]->Expand();
1235 dictionaryOut[iDict] = fDigitsManager->GetDictionary(iDet,iDict);
1236 dictionaryOut[iDict]->Allocate(nRowMax,nColMax,nTimeTotal);
1237 }
1238
1239 for (iRow = 0; iRow < nRowMax; iRow++ ) {
1240 for (iCol = 0; iCol < nColMax; iCol++ ) {
1241
1242 for (iTime = 0; iTime < nTimeTotal; iTime++) {
1243 Double_t signal = (Double_t) digitsIn->GetDataUnchecked(iRow,iCol,iTime);
1244 signal *= sDigitsScale;
1245 // Pad and time coupling
1246 signal *= coupling;
1247 // Add the noise, starting from minus ADC baseline in electrons
1248 Double_t baselineEl = adcBaseline * (adcInRange / adcOutRange) / convert;
1249 signal = TMath::Max((Double_t) gRandom->Gaus(signal,noise),-baselineEl);
1250 // Convert to mV
1251 signal *= convert;
1252 // add ADC baseline in mV
1253 signal += adcBaseline * (adcInRange / adcOutRange);
1254 // Convert to ADC counts. Set the overflow-bit adcOutRange if the
1255 // signal is larger than adcInRange
1256 Int_t adc = 0;
1257 if (signal >= adcInRange) {
1258 adc = ((Int_t) adcOutRange);
1259 }
1260 else {
1261 adc = ((Int_t) (signal * (adcOutRange / adcInRange)));
1262 }
1263 inADC[iTime] = adc;
1264 outADC[iTime] = adc;
1265 }
1266
1267 // Apply the tail cancelation via the digital filter
1268 if (fPar->TCOn()) {
1269 DeConvExp(inADC,outADC,nTimeTotal,fPar->GetTCnexp());
1270 }
1271
1272 for (iTime = 0; iTime < nTimeTotal; iTime++) {
1273 // Store the amplitude of the digit if above threshold
1274 if (outADC[iTime] > adcThreshold) {
1275 digitsOut->SetDataUnchecked(iRow,iCol,iTime,((Int_t) outADC[iTime]));
1276 // Copy the dictionary
1277 for (iDict = 0; iDict < kNDict; iDict++) {
1278 Int_t track = dictionaryIn[iDict]->GetDataUnchecked(iRow,iCol,iTime);
1279 dictionaryOut[iDict]->SetDataUnchecked(iRow,iCol,iTime,track);
1280 }
1281 }
1282 }
1283
1284 }
1285 }
1286
1287 if (fCompress) {
1288 digitsIn->Compress(1,0);
1289 digitsOut->Compress(1,0);
1290 for (iDict = 0; iDict < kNDict; iDict++) {
1291 dictionaryIn[iDict]->Compress(1,0);
1292 dictionaryOut[iDict]->Compress(1,0);
1293 }
1294 }
1295
1296 delete [] inADC;
1297 delete [] outADC;
1298
1299 }
1300
1301 return kTRUE;
1302
1303}
1304
1305//_____________________________________________________________________________
1306Bool_t AliTRDdigitizer::MergeSDigits()
1307{
1308 //
1309 // Merges the input s-digits:
1310 // - The amplitude of the different inputs are summed up.
1311 // - Of the track IDs from the input dictionaries only one is
1312 // kept for each input. This works for maximal 3 different merged inputs.
1313 //
1314
1315 // Number of track dictionary arrays
1316 const Int_t kNDict = AliTRDdigitsManager::kNDict;
1317
1318 if (!fPar) {
1319 fPar = new AliTRDparameter("TRDparameter","Standard parameter");
1320 if (fDebug > 0) {
1321 printf("<AliTRDdigitizer::MergeSDigits> ");
1322 printf("Create the default parameter object\n");
1323 }
1324 }
1325
1326 Int_t iDict = 0;
1327 Int_t jDict = 0;
1328
1329 AliTRDdataArrayI *digitsA;
1330 AliTRDdataArrayI *digitsB;
1331 AliTRDdataArrayI *dictionaryA[kNDict];
1332 AliTRDdataArrayI *dictionaryB[kNDict];
1333
1334 // Get the first s-digits
1335 fSDigitsManager = (AliTRDdigitsManager *) fSDigitsManagerList->First();
1336 if (!fSDigitsManager) return kFALSE;
1337
1338 // Loop through the other sets of s-digits
1339 AliTRDdigitsManager *mergeSDigitsManager;
1340 mergeSDigitsManager = (AliTRDdigitsManager *)
1341 fSDigitsManagerList->After(fSDigitsManager);
1342
1343 if (fDebug > 0) {
1344 if (mergeSDigitsManager) {
1345 printf("<AliTRDdigitizer::MergeSDigits> ");
1346 printf("Merge %d input files.\n",fSDigitsManagerList->GetSize());
1347 }
1348 else {
1349 printf("<AliTRDdigitizer::MergeSDigits> ");
1350 printf("Only one input file.\n");
1351 }
1352 }
1353
1354 Int_t iMerge = 0;
1355 while (mergeSDigitsManager) {
1356
1357 iMerge++;
1358
1359 // Loop through the detectors
1360 for (Int_t iDet = 0; iDet < AliTRDgeometry::Ndet(); iDet++) {
1361
1362 Int_t plane = fGeo->GetPlane(iDet);
1363 Int_t sector = fGeo->GetSector(iDet);
1364 Int_t chamber = fGeo->GetChamber(iDet);
1365 Int_t nRowMax = fPar->GetRowMax(plane,chamber,sector);
1366 Int_t nColMax = fPar->GetColMax(plane);
1367 Int_t nTimeTotal = fPar->GetTimeTotal();
1368
1369 // Loop through the pixels of one detector and add the signals
1370 digitsA = fSDigitsManager->GetDigits(iDet);
1371 digitsB = mergeSDigitsManager->GetDigits(iDet);
1372 digitsA->Expand();
1373 digitsB->Expand();
1374 for (iDict = 0; iDict < kNDict; iDict++) {
1375 dictionaryA[iDict] = fSDigitsManager->GetDictionary(iDet,iDict);
1376 dictionaryB[iDict] = mergeSDigitsManager->GetDictionary(iDet,iDict);
1377 dictionaryA[iDict]->Expand();
1378 dictionaryB[iDict]->Expand();
1379 }
1380
1381 // Merge only detectors that contain a signal
1382 Bool_t doMerge = kTRUE;
1383 if (fMergeSignalOnly) {
1384 if (digitsA->GetOverThreshold(0) == 0) {
1385 doMerge = kFALSE;
1386 }
1387 }
1388
1389 if (doMerge) {
1390
1391 if (fDebug > 0) {
1392 printf("<AliTRDdigitizer::MergeSDigits> ");
1393 printf("Merge detector %d of input no.%d\n",iDet,iMerge+1);
1394 }
1395
1396 for (Int_t iRow = 0; iRow < nRowMax; iRow++ ) {
1397 for (Int_t iCol = 0; iCol < nColMax; iCol++ ) {
1398 for (Int_t iTime = 0; iTime < nTimeTotal; iTime++) {
1399
1400 // Add the amplitudes of the summable digits
1401 Int_t ampA = digitsA->GetDataUnchecked(iRow,iCol,iTime);
1402 Int_t ampB = digitsB->GetDataUnchecked(iRow,iCol,iTime);
1403 ampA += ampB;
1404 digitsA->SetDataUnchecked(iRow,iCol,iTime,ampA);
1405
1406 // Add the mask to the track id if defined.
1407 for (iDict = 0; iDict < kNDict; iDict++) {
1408 Int_t trackB = dictionaryB[iDict]->GetDataUnchecked(iRow,iCol,iTime);
1409 if ((fMasks) && (trackB > 0)) {
1410 for (jDict = 0; jDict < kNDict; jDict++) {
1411 Int_t trackA = dictionaryA[iDict]->GetDataUnchecked(iRow,iCol,iTime);
1412 if (trackA == 0) {
1413 trackA = trackB + fMasks[iMerge];
1414 dictionaryA[iDict]->SetDataUnchecked(iRow,iCol,iTime,trackA);
1415 }
1416 }
1417 }
1418 }
1419
1420 }
1421 }
1422 }
1423
1424 }
1425
1426 if (fCompress) {
1427 digitsA->Compress(1,0);
1428 digitsB->Compress(1,0);
1429 for (iDict = 0; iDict < kNDict; iDict++) {
1430 dictionaryA[iDict]->Compress(1,0);
1431 dictionaryB[iDict]->Compress(1,0);
1432 }
1433 }
1434
1435 }
1436
1437 // The next set of s-digits
1438 mergeSDigitsManager = (AliTRDdigitsManager *)
1439 fSDigitsManagerList->After(mergeSDigitsManager);
1440
1441 }
1442
1443 return kTRUE;
1444
1445}
1446
1447//_____________________________________________________________________________
1448Bool_t AliTRDdigitizer::SDigits2Digits()
1449{
1450 //
1451 // Merges the input s-digits and converts them to normal digits
1452 //
1453
1454 if (!MergeSDigits()) return kFALSE;
1455
1456 return ConvertSDigits();
1457
1458}
1459
1460//_____________________________________________________________________________
1461Bool_t AliTRDdigitizer::CheckDetector(Int_t plane, Int_t chamber, Int_t sector)
1462{
1463 //
1464 // Checks whether a detector is enabled
1465 //
1466
1467 if (fSimpleSim) return kTRUE;
1468
1469 if ((fTRD->GetSensChamber() >= 0) &&
1470 (fTRD->GetSensChamber() != chamber)) return kFALSE;
1471 if ((fTRD->GetSensPlane() >= 0) &&
1472 (fTRD->GetSensPlane() != plane)) return kFALSE;
1473 if ( fTRD->GetSensSector() >= 0) {
1474 Int_t sens1 = fTRD->GetSensSector();
1475 Int_t sens2 = sens1 + fTRD->GetSensSectorRange();
1476 sens2 -= ((Int_t) (sens2 / AliTRDgeometry::Nsect()))
1477 * AliTRDgeometry::Nsect();
1478 if (sens1 < sens2) {
1479 if ((sector < sens1) || (sector >= sens2)) return kFALSE;
1480 }
1481 else {
1482 if ((sector < sens1) && (sector >= sens2)) return kFALSE;
1483 }
1484 }
1485
1486 return kTRUE;
1487
1488}
1489
1490//_____________________________________________________________________________
1491Bool_t AliTRDdigitizer::WriteDigits() const
1492{
1493 //
1494 // Writes out the TRD-digits and the dictionaries
1495 //
1496
1497 // Store the digits and the dictionary in the tree
1498 return fDigitsManager->WriteDigits();
1499
1500}
1501
1502//_____________________________________________________________________________
1503void AliTRDdigitizer::DeConvExp(Double_t *source, Double_t *target
1504 , Int_t n, Int_t nexp)
1505{
1506 //
1507 // Does the deconvolution by the digital filter.
1508 //
1509 // Author: Marcus Gutfleisch, KIP Heidelberg
1510 // Optimized for: New TRF from Venelin Angelov, simulated with CADENCE
1511 // Pad-ground capacitance = 25 pF
1512 // Pad-pad cross talk capacitance = 6 pF
1513 // For 10 MHz digitization, corresponding to 20 time bins
1514 // in the drift region
1515 //
1516
1517 Double_t rates[2];
1518 Double_t coefficients[2];
1519
1520 /* initialize (coefficient = alpha, rates = lambda) */
1521
1522 if( nexp == 1 ) {
1523 rates[0] = 0.466998;
1524 /* no rescaling */
1525 coefficients[0] = 1.0;
1526 }
1527 if( nexp == 2 ) {
1528 rates[0] = 0.8988162;
1529 coefficients[0] = 0.11392069;
1530 rates[1] = 0.3745688;
1531 coefficients[1] = 0.8860793;
1532 /* no rescaling */
1533 Float_t sumc = coefficients[0]+coefficients[1];
1534 coefficients[0] /= sumc;
1535 coefficients[1] /= sumc;
1536 }
1537
1538 Int_t i, k;
1539 Double_t reminder[2];
1540 Double_t correction, result;
1541
1542 /* attention: computation order is important */
1543 correction=0.0;
1544 for ( k = 0; k < nexp; k++ ) reminder[k]=0.0;
1545
1546 for ( i = 0; i < n; i++ ) {
1547 result = ( source[i] - correction ); /* no rescaling */
1548 target[i] = result;
1549
1550 for ( k = 0; k < nexp; k++ ) reminder[k] = rates[k]
1551 * ( reminder[k] + coefficients[k] * result);
1552
1553 correction=0.0;
1554 for ( k = 0; k < nexp; k++ ) correction += reminder[k];
1555 }
1556
1557}
1558
1559//_____________________________________________________________________________
1560void AliTRDdigitizer::InitOutput(Int_t iEvent)
1561{
1562 //
1563 // Initializes the output branches
1564 //
1565
1566 fEvent = iEvent;
1567
1568 if (!fRunLoader)
1569 {
1570 Error("InitOutput","Run Loader is NULL");
1571 return;
1572 }
1573 AliLoader* loader = fRunLoader->GetLoader("TRDLoader");
1574 if (!loader)
1575 {
1576 Error("Open","Can not get TRD loader from Run Loader");
1577 return;
1578 }
1579
1580 TTree* tree = 0;
1581
1582 if (fSDigits)
1583 {
1584 //if we produce SDigits
1585 tree = loader->TreeS();
1586 if (!tree)
1587 {
1588 loader->MakeTree("S");
1589 tree = loader->TreeS();
1590 }
1591 }
1592 else
1593 {//if we produce Digits
1594 tree = loader->TreeD();
1595 if (!tree)
1596 {
1597 loader->MakeTree("D");
1598 tree = loader->TreeD();
1599 }
1600 }
1601 fDigitsManager->SetEvent(iEvent);
1602 fDigitsManager->MakeBranch(tree);
1603
1604}