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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
18///////////////////////////////////////////////////////////////////////////////
19// //
20// Creates and handles digits from TRD hits //
b08ed1cf 21// Authors: C. Blume (blume@ikf.uni-frankfurt.de) //
22// C. Lippmann //
23// B. Vulpescu //
f7336fa3 24// //
25// The following effects are included: //
26// - Diffusion //
27// - ExB effects //
28// - Gas gain including fluctuations //
29// - Pad-response (simple Gaussian approximation) //
abaf1f1d 30// - Time-response //
f7336fa3 31// - Electronics noise //
32// - Electronics gain //
33// - Digitization //
34// - ADC threshold //
35// The corresponding parameter can be adjusted via the various //
36// Set-functions. If these parameters are not explicitly set, default //
37// values are used (see Init-function). //
f7336fa3 38// //
39///////////////////////////////////////////////////////////////////////////////
40
6798b56e 41#include <stdlib.h>
42
f7336fa3 43#include <TMath.h>
44#include <TVector.h>
45#include <TRandom.h>
94de3818 46#include <TROOT.h>
47#include <TTree.h>
793ff80c 48#include <TFile.h>
49#include <TF1.h>
abaf1f1d 50#include <TList.h>
85cbec76 51#include <TTask.h>
3becff3c 52#include <TGeoManager.h>
793ff80c 53
54#include "AliRun.h"
88cb7938 55#include "AliRunLoader.h"
56#include "AliLoader.h"
57#include "AliConfig.h"
db30bf0f 58#include "AliMagF.h"
85cbec76 59#include "AliRunDigitizer.h"
88cb7938 60#include "AliRunLoader.h"
61#include "AliLoader.h"
ad2cc20b 62#include "AliLog.h"
f7336fa3 63
64#include "AliTRD.h"
793ff80c 65#include "AliTRDhit.h"
f7336fa3 66#include "AliTRDdigitizer.h"
da581aea 67#include "AliTRDdataArrayI.h"
68#include "AliTRDdataArrayF.h"
793ff80c 69#include "AliTRDsegmentArray.h"
da581aea 70#include "AliTRDdigitsManager.h"
793ff80c 71#include "AliTRDgeometry.h"
a5cadd36 72#include "AliTRDpadPlane.h"
3551db50 73#include "AliTRDcalibDB.h"
74#include "AliTRDSimParam.h"
75#include "AliTRDCommonParam.h"
f7336fa3 76
77ClassImp(AliTRDdigitizer)
78
79//_____________________________________________________________________________
85cbec76 80AliTRDdigitizer::AliTRDdigitizer()
4d18a639 81 :AliDigitizer()
82 ,fRunLoader(0)
83 ,fDigitsManager(0)
84 ,fSDigitsManager(0)
85 ,fSDigitsManagerList(0)
86 ,fTRD(0)
87 ,fGeo(0)
88 ,fEvent(0)
89 ,fMasks(0)
90 ,fCompress(kTRUE)
91 ,fSDigits(kFALSE)
92 ,fSDigitsScale(0.0)
93 ,fMergeSignalOnly(kFALSE)
94 ,fDiffLastVdrift(0)
95 ,fDiffusionT(0.0)
96 ,fDiffusionL(0.0)
97 ,fOmegaTau(0.0)
98 ,fLorentzFactor(0.0)
99 ,fTimeLastVdrift(0)
100 ,fTimeStruct1(0)
101 ,fTimeStruct2(0)
102 ,fVDlo(0)
103 ,fVDhi(0)
f7336fa3 104{
105 //
106 // AliTRDdigitizer default constructor
107 //
3551db50 108
109 Init();
3becff3c 110
f7336fa3 111}
112
113//_____________________________________________________________________________
4d18a639 114AliTRDdigitizer::AliTRDdigitizer(const Text_t *name, const Text_t *title)
115 :AliDigitizer(name,title)
116 ,fRunLoader(0)
117 ,fDigitsManager(0)
118 ,fSDigitsManager(0)
119 ,fSDigitsManagerList(0)
120 ,fTRD(0)
121 ,fGeo(0)
122 ,fEvent(0)
123 ,fMasks(0)
124 ,fCompress(kTRUE)
125 ,fSDigits(kFALSE)
126 ,fSDigitsScale(0.0)
127 ,fMergeSignalOnly(kFALSE)
128 ,fDiffLastVdrift(0)
129 ,fDiffusionT(0.0)
130 ,fDiffusionL(0.0)
131 ,fOmegaTau(0.0)
132 ,fLorentzFactor(0.0)
133 ,fTimeLastVdrift(0)
134 ,fTimeStruct1(0)
135 ,fTimeStruct2(0)
136 ,fVDlo(0)
137 ,fVDhi(0)
f7336fa3 138{
139 //
85cbec76 140 // AliTRDdigitizer constructor
141 //
142
3551db50 143 Init();
3becff3c 144
85cbec76 145}
146
147//_____________________________________________________________________________
148AliTRDdigitizer::AliTRDdigitizer(AliRunDigitizer *manager
4d18a639 149 , const Text_t *name, const Text_t *title)
150 :AliDigitizer(manager,name,title)
151 ,fRunLoader(0)
152 ,fDigitsManager(0)
153 ,fSDigitsManager(0)
154 ,fSDigitsManagerList(0)
155 ,fTRD(0)
156 ,fGeo(0)
157 ,fEvent(0)
158 ,fMasks(0)
159 ,fCompress(kTRUE)
160 ,fSDigits(kFALSE)
161 ,fSDigitsScale(0.0)
162 ,fMergeSignalOnly(kFALSE)
163 ,fDiffLastVdrift(0)
164 ,fDiffusionT(0.0)
165 ,fDiffusionL(0.0)
166 ,fOmegaTau(0.0)
167 ,fLorentzFactor(0.0)
168 ,fTimeLastVdrift(0)
169 ,fTimeStruct1(0)
170 ,fTimeStruct2(0)
171 ,fVDlo(0)
172 ,fVDhi(0)
85cbec76 173{
174 //
175 // AliTRDdigitizer constructor
f7336fa3 176 //
177
3551db50 178 Init();
3becff3c 179
bfc40adc 180}
181
182//_____________________________________________________________________________
183AliTRDdigitizer::AliTRDdigitizer(AliRunDigitizer *manager)
4d18a639 184 :AliDigitizer(manager,"AliTRDdigitizer","TRD digitizer")
185 ,fRunLoader(0)
186 ,fDigitsManager(0)
187 ,fSDigitsManager(0)
188 ,fSDigitsManagerList(0)
189 ,fTRD(0)
190 ,fGeo(0)
191 ,fEvent(0)
192 ,fMasks(0)
193 ,fCompress(kTRUE)
194 ,fSDigits(kFALSE)
195 ,fSDigitsScale(0.0)
196 ,fMergeSignalOnly(kFALSE)
197 ,fDiffLastVdrift(0)
198 ,fDiffusionT(0.0)
199 ,fDiffusionL(0.0)
200 ,fOmegaTau(0.0)
201 ,fLorentzFactor(0.0)
202 ,fTimeLastVdrift(0)
203 ,fTimeStruct1(0)
204 ,fTimeStruct2(0)
205 ,fVDlo(0)
206 ,fVDhi(0)
bfc40adc 207{
208 //
209 // AliTRDdigitizer constructor
210 //
211
3551db50 212 Init();
3becff3c 213
3551db50 214}
88cb7938 215
3551db50 216//_____________________________________________________________________________
217Bool_t AliTRDdigitizer::Init()
218{
3becff3c 219 //
220 // Initialize the digitizer with default values
221 //
222
85a5290f 223 fRunLoader = 0;
4487dad0 224 fDigitsManager = 0;
4487dad0 225 fSDigitsManager = 0;
85a5290f 226 fSDigitsManagerList = 0;
4487dad0 227 fTRD = 0;
228 fGeo = 0;
3becff3c 229
abaf1f1d 230 fEvent = 0;
85a5290f 231 fMasks = 0;
abaf1f1d 232 fCompress = kTRUE;
abaf1f1d 233 fSDigits = kFALSE;
4d18a639 234 fSDigitsScale = 100.0;
4487dad0 235 fMergeSignalOnly = kFALSE;
3551db50 236
4d18a639 237 fTimeLastVdrift = -1;
238 fTimeStruct1 = 0;
239 fTimeStruct2 = 0;
240 fVDlo = 0;
241 fVDhi = 0;
3551db50 242
4d18a639 243 fDiffLastVdrift = -1;
244 fDiffusionT = 0.0;
245 fDiffusionL = 0.0;
246 fLorentzFactor = 0.0;
793ff80c 247
3551db50 248 return AliDigitizer::Init();
3becff3c 249
f7336fa3 250}
251
8230f242 252//_____________________________________________________________________________
4d18a639 253AliTRDdigitizer::AliTRDdigitizer(const AliTRDdigitizer &d)
254 :AliDigitizer(d)
255 ,fRunLoader(0)
256 ,fDigitsManager(0)
257 ,fSDigitsManager(0)
258 ,fSDigitsManagerList(0)
259 ,fTRD(0)
260 ,fGeo(0)
261 ,fEvent(0)
262 ,fMasks(0)
263 ,fCompress(d.fCompress)
264 ,fSDigits(d.fSDigits)
265 ,fSDigitsScale(d.fSDigitsScale)
266 ,fMergeSignalOnly(d.fMergeSignalOnly)
267 ,fDiffLastVdrift(-1)
268 ,fDiffusionT(0.0)
269 ,fDiffusionL(0.0)
270 ,fOmegaTau(0.0)
271 ,fLorentzFactor(0.0)
272 ,fTimeLastVdrift(-1)
273 ,fTimeStruct1(0)
274 ,fTimeStruct2(0)
275 ,fVDlo(0)
276 ,fVDhi(0)
8230f242 277{
278 //
279 // AliTRDdigitizer copy constructor
280 //
281
4d18a639 282 // Do not copy timestructs, just invalidate lastvdrift.
283 // Next time they are requested, they get recalculated
284 if (((AliTRDdigitizer &) d).fTimeStruct1) {
285 delete [] ((AliTRDdigitizer &) d).fTimeStruct1;
286 ((AliTRDdigitizer &) d).fTimeStruct1 = 0;
287 }
288 if (((AliTRDdigitizer &) d).fTimeStruct2) {
289 delete [] ((AliTRDdigitizer &) d).fTimeStruct2;
290 ((AliTRDdigitizer &) d).fTimeStruct2 = 0;
291 }
8230f242 292
293}
294
f7336fa3 295//_____________________________________________________________________________
296AliTRDdigitizer::~AliTRDdigitizer()
297{
8230f242 298 //
299 // AliTRDdigitizer destructor
300 //
f7336fa3 301
abaf1f1d 302 if (fDigitsManager) {
303 delete fDigitsManager;
4d18a639 304 fDigitsManager = 0;
f7336fa3 305 }
306
4d18a639 307 if (fDigitsManager) {
308 delete fSDigitsManager;
309 fSDigitsManager = 0;
310 }
f7336fa3 311
abaf1f1d 312 if (fSDigitsManagerList) {
47b5729a 313 fSDigitsManagerList->Delete();
abaf1f1d 314 delete fSDigitsManagerList;
4487dad0 315 fSDigitsManagerList = 0;
e23fbb27 316 }
317
318 if (fMasks) {
319 delete [] fMasks;
320 fMasks = 0;
321 }
322
4d18a639 323 if (fTimeStruct1) {
324 delete [] fTimeStruct1;
325 fTimeStruct1 = 0;
3551db50 326 }
327
4d18a639 328 if (fTimeStruct2) {
329 delete [] fTimeStruct2;
330 fTimeStruct2 = 0;
3551db50 331 }
3becff3c 332
f7336fa3 333}
334
8230f242 335//_____________________________________________________________________________
dd9a6ee3 336AliTRDdigitizer &AliTRDdigitizer::operator=(const AliTRDdigitizer &d)
337{
338 //
339 // Assignment operator
340 //
341
342 if (this != &d) ((AliTRDdigitizer &) d).Copy(*this);
4d18a639 343
dd9a6ee3 344 return *this;
345
346}
347
348//_____________________________________________________________________________
e0d47c25 349void AliTRDdigitizer::Copy(TObject &d) const
8230f242 350{
351 //
352 // Copy function
353 //
354
85a5290f 355 ((AliTRDdigitizer &) d).fRunLoader = 0;
4487dad0 356 ((AliTRDdigitizer &) d).fDigitsManager = 0;
85a5290f 357 ((AliTRDdigitizer &) d).fSDigitsManager = 0;
358 ((AliTRDdigitizer &) d).fSDigitsManagerList = 0;
4487dad0 359 ((AliTRDdigitizer &) d).fTRD = 0;
360 ((AliTRDdigitizer &) d).fGeo = 0;
85a5290f 361 ((AliTRDdigitizer &) d).fEvent = 0;
362 ((AliTRDdigitizer &) d).fMasks = 0;
abaf1f1d 363 ((AliTRDdigitizer &) d).fCompress = fCompress;
abaf1f1d 364 ((AliTRDdigitizer &) d).fSDigits = fSDigits;
365 ((AliTRDdigitizer &) d).fSDigitsScale = fSDigitsScale;
4487dad0 366 ((AliTRDdigitizer &) d).fMergeSignalOnly = fMergeSignalOnly;
0c24ba98 367
3551db50 368 AliTRDdigitizer& target = (AliTRDdigitizer &) d;
369
3becff3c 370 // Do not copy timestructs, just invalidate lastvdrift.
371 // Next time they are requested, they get recalculated
4d18a639 372 if (target.fTimeStruct1) {
95867fd1 373 delete [] target.fTimeStruct1;
4d18a639 374 target.fTimeStruct1 = 0;
3551db50 375 }
4d18a639 376 if (target.fTimeStruct2) {
95867fd1 377 delete [] target.fTimeStruct2;
4d18a639 378 target.fTimeStruct2 = 0;
3becff3c 379 }
4d18a639 380 target.fTimeLastVdrift = -1;
3becff3c 381
e23fbb27 382}
383
e23fbb27 384//_____________________________________________________________________________
4d18a639 385void AliTRDdigitizer::Exec(Option_t *option)
e23fbb27 386{
387 //
388 // Executes the merging
389 //
390
391 Int_t iInput;
392
393 AliTRDdigitsManager *sdigitsManager;
394
395 TString optionString = option;
396 if (optionString.Contains("deb")) {
9afbd7de 397 AliLog::SetClassDebugLevel("AliTRDdigitizer",1);
7925de54 398 AliInfo("Called with debug option");
e23fbb27 399 }
400
cec4059b 401 // The AliRoot file is already connected by the manager
4d18a639 402 AliRunLoader *inrl;
88cb7938 403
9afbd7de 404 if (gAlice) {
7925de54 405 AliDebug(1,"AliRun object found on file.");
9afbd7de 406 }
4487dad0 407 else {
88cb7938 408 inrl = AliRunLoader::GetRunLoader(fManager->GetInputFolderName(0));
409 inrl->LoadgAlice();
410 gAlice = inrl->GetAliRun();
9afbd7de 411 if (!gAlice) {
7925de54 412 AliError("Could not find AliRun object.")
9afbd7de 413 return;
414 }
4487dad0 415 }
cec4059b 416
e23fbb27 417 Int_t nInput = fManager->GetNinputs();
4d18a639 418 fMasks = new Int_t[nInput];
e23fbb27 419 for (iInput = 0; iInput < nInput; iInput++) {
420 fMasks[iInput] = fManager->GetMask(iInput);
421 }
e23fbb27 422
9afbd7de 423 //
e23fbb27 424 // Initialization
9afbd7de 425 //
e23fbb27 426
95867fd1 427 AliRunLoader *orl = AliRunLoader::GetRunLoader(fManager->GetOutputFolderName());
428
67c67368 429 if (InitDetector()) {
9afbd7de 430
95867fd1 431 AliLoader *ogime = orl->GetLoader("TRDLoader");
67c67368 432
95867fd1 433 TTree *tree = 0;
9afbd7de 434 if (fSDigits) {
435 // If we produce SDigits
436 tree = ogime->TreeS();
437 if (!tree) {
438 ogime->MakeTree("S");
67c67368 439 tree = ogime->TreeS();
67c67368 440 }
9afbd7de 441 }
442 else {
443 // If we produce Digits
444 tree = ogime->TreeD();
445 if (!tree) {
446 ogime->MakeTree("D");
447 tree = ogime->TreeD();
67c67368 448 }
9afbd7de 449 }
450
67c67368 451 MakeBranch(tree);
9afbd7de 452
67c67368 453 }
454
e23fbb27 455 for (iInput = 0; iInput < nInput; iInput++) {
456
7925de54 457 AliDebug(1,Form("Add input stream %d",iInput));
e23fbb27 458
9afbd7de 459 // Check if the input tree exists
88cb7938 460 inrl = AliRunLoader::GetRunLoader(fManager->GetInputFolderName(iInput));
4d18a639 461 AliLoader *gime = inrl->GetLoader("TRDLoader");
88cb7938 462
4d18a639 463 TTree *treees = gime->TreeS();
9afbd7de 464 if (treees == 0x0) {
465 if (gime->LoadSDigits()) {
466 AliError(Form("Error Occured while loading S. Digits for input %d.",iInput));
467 return;
468 }
4d18a639 469 treees = gime->TreeS();
9afbd7de 470 }
88cb7938 471
472 if (treees == 0x0) {
7925de54 473 AliError(Form("Input stream %d does not exist",iInput));
c57e2264 474 return;
475 }
476
e23fbb27 477 // Read the s-digits via digits manager
478 sdigitsManager = new AliTRDdigitsManager();
e23fbb27 479 sdigitsManager->SetSDigits(kTRUE);
88cb7938 480
4d18a639 481 AliRunLoader *rl = AliRunLoader::GetRunLoader(fManager->GetInputFolderName(iInput));
482 AliLoader *gimme = rl->GetLoader("TRDLoader");
483 if (!gimme->TreeS()) {
484 gimme->LoadSDigits();
485 }
88cb7938 486 sdigitsManager->ReadDigits(gimme->TreeS());
e23fbb27 487
488 // Add the s-digits to the input list
489 AddSDigitsManager(sdigitsManager);
490
491 }
492
493 // Convert the s-digits to normal digits
7925de54 494 AliDebug(1,"Do the conversion");
e23fbb27 495 SDigits2Digits();
496
497 // Store the digits
7925de54 498 AliDebug(1,"Write the digits");
e23fbb27 499 fDigitsManager->WriteDigits();
88cb7938 500
9afbd7de 501 // Write parameters
67c67368 502 orl->CdGAFile();
67c67368 503
7925de54 504 AliDebug(1,"Done");
e23fbb27 505
b1113c6b 506 DeleteSDigitsManager();
507
e23fbb27 508}
509
f7336fa3 510//_____________________________________________________________________________
e23fbb27 511Bool_t AliTRDdigitizer::Open(const Char_t *file, Int_t nEvent)
f7336fa3 512{
513 //
514 // Opens a ROOT-file with TRD-hits and reads in the hit-tree
515 //
f7336fa3 516 // Connect the AliRoot file containing Geometry, Kine, and Hits
3becff3c 517 //
f540341d 518
e191bb57 519 TString evfoldname = AliConfig::GetDefaultEventFolderName();
9afbd7de 520
f540341d 521 fRunLoader = AliRunLoader::GetRunLoader(evfoldname);
9afbd7de 522 if (!fRunLoader) {
523 fRunLoader = AliRunLoader::Open(file,evfoldname,"UPDATE");
524 }
9afbd7de 525 if (!fRunLoader) {
95867fd1 526 AliError(Form("Can not open session for file %s.",file));
527 return kFALSE;
528 }
529
530 if (!fRunLoader->GetAliRun()) {
531 fRunLoader->LoadgAlice();
532 }
533 gAlice = fRunLoader->GetAliRun();
534
535 if (gAlice) {
7925de54 536 AliDebug(1,"AliRun object found on file.");
95867fd1 537 }
538 else {
7925de54 539 AliError("Could not find AliRun object.");
95867fd1 540 return kFALSE;
541 }
542
543 fEvent = nEvent;
544
545 AliLoader *loader = fRunLoader->GetLoader("TRDLoader");
546 if (!loader) {
547 AliError("Can not get TRD loader from Run Loader");
548 return kFALSE;
549 }
550
551 if (InitDetector()) {
552 TTree *tree = 0;
553 if (fSDigits) {
554 // If we produce SDigits
555 tree = loader->TreeS();
556 if (!tree) {
557 loader->MakeTree("S");
558 tree = loader->TreeS();
559 }
560 }
561 else {
562 // If we produce Digits
563 tree = loader->TreeD();
564 if (!tree) {
565 loader->MakeTree("D");
566 tree = loader->TreeD();
567 }
568 }
569 return MakeBranch(tree);
570 }
571 else {
572 return kFALSE;
573 }
574
575}
576
577//_____________________________________________________________________________
578Bool_t AliTRDdigitizer::Open(AliRunLoader *runLoader, Int_t nEvent)
579{
580 //
581 // Opens a ROOT-file with TRD-hits and reads in the hit-tree
582 //
583 // Connect the AliRoot file containing Geometry, Kine, and Hits
584 //
585
586 fRunLoader = runLoader;
587 if (!fRunLoader) {
588 AliError("RunLoader does not exist");
589 return kFALSE;
4d18a639 590 }
88cb7938 591
9afbd7de 592 if (!fRunLoader->GetAliRun()) {
593 fRunLoader->LoadgAlice();
594 }
88cb7938 595 gAlice = fRunLoader->GetAliRun();
596
da581aea 597 if (gAlice) {
7925de54 598 AliDebug(1,"AliRun object found on file.");
da581aea 599 }
600 else {
7925de54 601 AliError("Could not find AliRun object.");
da581aea 602 return kFALSE;
603 }
f7336fa3 604
605 fEvent = nEvent;
606
4d18a639 607 AliLoader *loader = fRunLoader->GetLoader("TRDLoader");
9afbd7de 608 if (!loader) {
609 AliError("Can not get TRD loader from Run Loader");
610 return kFALSE;
611 }
88cb7938 612
abaf1f1d 613 if (InitDetector()) {
4d18a639 614 TTree *tree = 0;
9afbd7de 615 if (fSDigits) {
616 // If we produce SDigits
617 tree = loader->TreeS();
618 if (!tree) {
619 loader->MakeTree("S");
620 tree = loader->TreeS();
4d18a639 621 }
9afbd7de 622 }
623 else {
624 // If we produce Digits
95867fd1 625 tree = loader->TreeD();
9afbd7de 626 if (!tree) {
627 loader->MakeTree("D");
628 tree = loader->TreeD();
4d18a639 629 }
9afbd7de 630 }
88cb7938 631 return MakeBranch(tree);
abaf1f1d 632 }
633 else {
634 return kFALSE;
635 }
793ff80c 636
637}
638
639//_____________________________________________________________________________
640Bool_t AliTRDdigitizer::InitDetector()
641{
642 //
643 // Sets the pointer to the TRD detector and the geometry
644 //
645
dd9a6ee3 646 // Get the pointer to the detector class and check for version 1
4487dad0 647 fTRD = (AliTRD *) gAlice->GetDetector("TRD");
cec4059b 648 if (!fTRD) {
7925de54 649 AliFatal("No TRD module found");
cec4059b 650 exit(1);
651 }
dd9a6ee3 652 if (fTRD->IsVersion() != 1) {
7925de54 653 AliFatal("TRD must be version 1 (slow simulator)");
dd9a6ee3 654 exit(1);
655 }
656
657 // Get the geometry
658 fGeo = fTRD->GetGeometry();
7925de54 659 AliDebug(1,Form("Geometry version %d",fGeo->IsVersion()));
dd9a6ee3 660
abaf1f1d 661 // Create a digits manager
47b5729a 662 delete fDigitsManager;
abaf1f1d 663 fDigitsManager = new AliTRDdigitsManager();
664 fDigitsManager->SetSDigits(fSDigits);
665 fDigitsManager->CreateArrays();
666 fDigitsManager->SetEvent(fEvent);
abaf1f1d 667
668 // The list for the input s-digits manager to be merged
47b5729a 669 if (fSDigitsManagerList) {
670 fSDigitsManagerList->Delete();
3becff3c 671 }
672 else {
47b5729a 673 fSDigitsManagerList = new TList();
674 }
abaf1f1d 675
4487dad0 676 return kTRUE;
f7336fa3 677
678}
679
6244debe 680//_____________________________________________________________________________
95867fd1 681Bool_t AliTRDdigitizer::MakeBranch(TTree *tree) const
6244debe 682{
abaf1f1d 683 //
684 // Create the branches for the digits array
6244debe 685 //
686
88cb7938 687 return fDigitsManager->MakeBranch(tree);
6244debe 688
689}
690
f7336fa3 691//_____________________________________________________________________________
692Bool_t AliTRDdigitizer::MakeDigits()
693{
694 //
872a7aba 695 // Creates digits.
f7336fa3 696 //
697
f7336fa3 698 ///////////////////////////////////////////////////////////////
699 // Parameter
700 ///////////////////////////////////////////////////////////////
701
702 // Converts number of electrons to fC
4d18a639 703 const Double_t kEl2fC = 1.602e-19 * 1.0e15;
f7336fa3 704
705 ///////////////////////////////////////////////////////////////
706
793ff80c 707 // Number of pads included in the pad response
a5cadd36 708 const Int_t kNpad = 3;
793ff80c 709
710 // Number of track dictionary arrays
a5cadd36 711 const Int_t kNDict = AliTRDdigitsManager::kNDict;
793ff80c 712
872a7aba 713 // Half the width of the amplification region
4d18a639 714 const Float_t kAmWidth = AliTRDgeometry::AmThick() / 2.0;
3becff3c 715 // Width of the drift region
ccb4315c 716 const Float_t kDrWidth = AliTRDgeometry::DrThick();
3551db50 717
4d18a639 718 Int_t iRow;
719 Int_t iCol;
720 Int_t iTime;
721 Int_t iPad;
a5cadd36 722 Int_t iDict = 0;
723 Int_t nBytes = 0;
f7336fa3 724
a5cadd36 725 Int_t totalSizeDigits = 0;
726 Int_t totalSizeDict0 = 0;
727 Int_t totalSizeDict1 = 0;
728 Int_t totalSizeDict2 = 0;
f7336fa3 729
a5cadd36 730 Int_t timeBinTRFend = 1;
872a7aba 731
a5cadd36 732 Double_t pos[3];
733 Double_t rot[3];
734 Double_t xyz[3];
735 Double_t padSignal[kNpad];
736 Double_t signalOld[kNpad];
872a7aba 737
a5cadd36 738 AliTRDdataArrayF *signals = 0;
739 AliTRDdataArrayI *digits = 0;
8230f242 740 AliTRDdataArrayI *dictionary[kNDict];
da581aea 741
a5cadd36 742 AliTRDpadPlane *padPlane = 0;
743
9afbd7de 744 if (!gGeoManager) {
745 AliFatal("No geometry manager!");
746 }
7754cd1f 747
9afbd7de 748 AliTRDSimParam *simParam = AliTRDSimParam::Instance();
3becff3c 749 if (!simParam) {
7925de54 750 AliError("Could not get simulation parameters");
3551db50 751 return kFALSE;
752 }
753
9afbd7de 754 AliTRDCommonParam *commonParam = AliTRDCommonParam::Instance();
3becff3c 755 if (!commonParam) {
7925de54 756 AliError("Could not get common parameterss");
3551db50 757 return kFALSE;
758 }
759
793ff80c 760 // Create a container for the amplitudes
9afbd7de 761 AliTRDsegmentArray *signalsArray = new AliTRDsegmentArray("AliTRDdataArrayF"
762 ,AliTRDgeometry::Ndet());
793ff80c 763
3551db50 764 AliTRDcalibDB* calibration = AliTRDcalibDB::Instance();
3becff3c 765 if (!calibration) {
7925de54 766 AliError("Could not get calibration object");
3551db50 767 return kFALSE;
768 }
769
770 if (simParam->TRFOn()) {
9afbd7de 771 timeBinTRFend = ((Int_t) (simParam->GetTRFhi()
b43a3e17 772 * commonParam->GetSamplingFrequency())) - 1;
7925de54 773 AliDebug(1,Form("Sample the TRF up to bin %d",timeBinTRFend));
da581aea 774 }
775
4d18a639 776 Float_t elAttachProp = simParam->GetElAttachProp() / 100.0;
793ff80c 777
872a7aba 778 if (!fGeo) {
7925de54 779 AliError("No geometry defined");
872a7aba 780 return kFALSE;
781 }
782
7925de54 783 AliDebug(1,"Start creating digits.");
872a7aba 784
4d18a639 785 AliLoader *gimme = fRunLoader->GetLoader("TRDLoader");
9afbd7de 786 if (!gimme->TreeH()) {
787 gimme->LoadHits();
788 }
4d18a639 789 TTree *hitTree = gimme->TreeH();
3becff3c 790 if (hitTree == 0x0) {
9afbd7de 791 AliError("Can not get TreeH");
792 return kFALSE;
3becff3c 793 }
88cb7938 794 fTRD->SetTreeAddress();
795
793ff80c 796 // Get the number of entries in the hit tree
797 // (Number of primary particles creating a hit somewhere)
3becff3c 798 Int_t nTrack = (Int_t) hitTree->GetEntries();
7925de54 799 AliDebug(1,Form("Found %d primary particles",nTrack));
800 AliDebug(1,Form("Sampling = %.0fMHz" ,commonParam->GetSamplingFrequency()));
801 AliDebug(1,Form("Gain = %d" ,((Int_t) simParam->GetGasGain())));
802 AliDebug(1,Form("Noise = %d" ,((Int_t) simParam->GetNoise())));
9afbd7de 803 if (simParam->TimeStructOn()) {
7925de54 804 AliDebug(1,"Time Structure of drift cells implemented.");
9afbd7de 805 }
806 else {
7925de54 807 AliDebug(1,"Constant drift velocity in drift cells.");
a328fff9 808 }
3551db50 809
9afbd7de 810 Int_t detectorOld = -1;
811 Int_t countHits = 0;
812
3becff3c 813 Int_t nTimeTotal = calibration->GetNumberOfTimeBins();
b43a3e17 814 Float_t samplingRate = commonParam->GetSamplingFrequency();
a328fff9 815
793ff80c 816 // Loop through all entries in the tree
817 for (Int_t iTrack = 0; iTrack < nTrack; iTrack++) {
818
3becff3c 819 gAlice->ResetHits();
820 nBytes += hitTree->GetEvent(iTrack);
793ff80c 821
e23fbb27 822 // Loop through the TRD hits
823 Int_t iHit = 0;
824 AliTRDhit *hit = (AliTRDhit *) fTRD->FirstHit(-1);
825 while (hit) {
826
793ff80c 827 countHits++;
e23fbb27 828 iHit++;
829
f881dc35 830 Float_t q = hit->GetCharge();
b08ed1cf 831 // Don't analyze test hits
f881dc35 832 if (((Int_t) q) == 0) {
833 hit = (AliTRDhit *) fTRD->NextHit();
834 continue;
835 }
e153aaf6 836
f881dc35 837 pos[0] = hit->X();
838 pos[1] = hit->Y();
839 pos[2] = hit->Z();
840 Int_t track = hit->Track();
841 Int_t detector = hit->GetDetector();
842 Int_t plane = fGeo->GetPlane(detector);
843 Int_t chamber = fGeo->GetChamber(detector);
844 Float_t time0 = AliTRDgeometry::GetTime0(plane);
845 padPlane = commonParam->GetPadPlane(plane,chamber);
846 Float_t row0 = padPlane->GetRow0();
847 Int_t nRowMax = padPlane->GetNrows();
848 Int_t nColMax = padPlane->GetNcols();
849 Int_t inDrift = 1;
850
851 // Find the current volume with the geo manager
852 gGeoManager->SetCurrentPoint(pos);
853 gGeoManager->FindNode();
854 if (strstr(gGeoManager->GetPath(),"/UK")) {
855 inDrift = 0;
856 }
857
858 if (detector != detectorOld) {
859
860 // Compress the old one if enabled
861 if ((fCompress) && (detectorOld > -1)) {
862 signals->Compress(1,0);
863 for (iDict = 0; iDict < kNDict; iDict++) {
864 dictionary[iDict]->Compress(1,0);
865 }
866 }
867 // Get the new container
868 signals = (AliTRDdataArrayF *) signalsArray->At(detector);
869 if (signals->GetNtime() == 0) {
870 // Allocate a new one if not yet existing
871 signals->Allocate(nRowMax,nColMax,nTimeTotal);
872 }
873 else {
874 // Expand an existing one
875 if (fCompress) {
876 signals->Expand();
793ff80c 877 }
f881dc35 878 }
879 // The same for the dictionary
880 for (iDict = 0; iDict < kNDict; iDict++) {
881 dictionary[iDict] = fDigitsManager->GetDictionary(detector,iDict);
882 if (dictionary[iDict]->GetNtime() == 0) {
883 dictionary[iDict]->Allocate(nRowMax,nColMax,nTimeTotal);
793ff80c 884 }
885 else {
f881dc35 886 if (fCompress) dictionary[iDict]->Expand();
887 }
888 }
889 detectorOld = detector;
890 }
793ff80c 891
f881dc35 892 // Rotate the sectors on top of each other
893 // by using the geoManager
894 Double_t aaa[3];
895 gGeoManager->MasterToLocal(pos,aaa);
896 if (inDrift) {
897 aaa[2] = time0 - (kDrWidth / 2.0 + kAmWidth) + aaa[2];
898 }
899 else {
900 aaa[2] = time0 + aaa[2];
901 }
902 aaa[1] = row0 + padPlane->GetLengthRim() + fGeo->RpadW()
903 - 0.5 * fGeo->GetChamberLength(plane,chamber)
904 + aaa[1];
905 rot[0] = aaa[2];
906 rot[1] = aaa[0];
907 rot[2] = aaa[1];
908
909 // The driftlength. It is negative if the hit is between pad plane and anode wires.
910 Double_t driftlength = time0 - rot[0];
911
912 // Loop over all electrons of this hit
913 // TR photons produce hits with negative charge
914 Int_t nEl = ((Int_t) TMath::Abs(q));
915 for (Int_t iEl = 0; iEl < nEl; iEl++) {
916
917 xyz[0] = rot[0];
918 xyz[1] = rot[1];
919 xyz[2] = rot[2];
920
921 // Stupid patch to take care of TR photons that are absorbed
922 // outside the chamber volume. A real fix would actually need
923 // a more clever implementation of the TR hit generation
924 if (q < 0.0) {
925 if ((xyz[2] < padPlane->GetRowEnd()) ||
926 (xyz[2] > padPlane->GetRow0())) {
927 if (iEl == 0) {
7925de54 928 AliDebug(2,Form("Hit outside of sensitive volume, row (z=%f, row0=%f, rowE=%f)"
f881dc35 929 ,xyz[2],padPlane->GetRow0(),padPlane->GetRowEnd()));
a328fff9 930 }
f881dc35 931 continue;
932 }
933 Float_t tt = driftlength + kAmWidth;
934 if ((tt < 0.0) ||
935 (tt > kDrWidth + 2.0*kAmWidth)) {
936 if (iEl == 0) {
7925de54 937 AliDebug(2,Form("Hit outside of sensitive volume, time (Q = %d)"
f881dc35 938 ,((Int_t) q)));
a328fff9 939 }
f881dc35 940 continue;
a328fff9 941 }
f881dc35 942 }
a328fff9 943
f881dc35 944 // Get row and col of unsmeared electron to retrieve drift velocity
945 // The pad row (z-direction)
946 Int_t rowE = padPlane->GetPadRowNumber(xyz[2]);
947 if (rowE < 0) continue;
948 Double_t rowOffset = padPlane->GetPadRowOffset(rowE,xyz[2]);
e23fbb27 949
f881dc35 950 // The pad column (rphi-direction)
951 Double_t offsetTilt = padPlane->GetTiltOffset(rowOffset);
952 Int_t colE = padPlane->GetPadColNumber(xyz[1]+offsetTilt,rowOffset);
953 if (colE < 0) continue;
954 Double_t colOffset = padPlane->GetPadColOffset(colE,xyz[1]+offsetTilt);
ccb4315c 955
f881dc35 956 Float_t driftvelocity = calibration->GetVdrift(detector,colE,rowE);
3551db50 957
f881dc35 958 // Normalised drift length
959 Double_t absdriftlength = TMath::Abs(driftlength);
960 if (commonParam->ExBOn()) {
961 absdriftlength /= TMath::Sqrt(GetLorentzFactor(driftvelocity));
962 }
3551db50 963
f881dc35 964 // Electron attachment
965 if (simParam->ElAttachOn()) {
966 if (gRandom->Rndm() < (absdriftlength * elAttachProp)) continue;
967 }
3551db50 968
f881dc35 969 // Apply the diffusion smearing
970 if (simParam->DiffusionOn()) {
971 if (!(Diffusion(driftvelocity,absdriftlength,xyz))) continue;
972 }
3551db50 973
f881dc35 974 // Apply E x B effects (depends on drift direction)
975 if (commonParam->ExBOn()) {
976 if (!(ExB(driftvelocity,driftlength,xyz))) continue;
977 }
3551db50 978
f881dc35 979 // The electron position after diffusion and ExB in pad coordinates.
980 // The pad row (z-direction)
981 rowE = padPlane->GetPadRowNumber(xyz[2]);
982 if (rowE < 0) continue;
983 rowOffset = padPlane->GetPadRowOffset(rowE,xyz[2]);
984
985 // The pad column (rphi-direction)
986 offsetTilt = padPlane->GetTiltOffset(rowOffset);
987 colE = padPlane->GetPadColNumber(xyz[1]+offsetTilt,rowOffset);
988 if (colE < 0) continue;
989 colOffset = padPlane->GetPadColOffset(colE,xyz[1]+offsetTilt);
3551db50 990
f881dc35 991 // Also re-retrieve drift velocity because col and row may have changed
992 driftvelocity = calibration->GetVdrift(detector,colE,rowE);
993 Float_t t0 = calibration->GetT0(detector,colE,rowE);
d4c6453d 994
f881dc35 995 // Convert the position to drift time, using either constant drift velocity or
996 // time structure of drift cells (non-isochronity, GARFIELD calculation).
997 Double_t drifttime;
998 if (simParam->TimeStructOn()) {
999 // Get z-position with respect to anode wire:
1000 Double_t Z = row0 - xyz[2] + simParam->GetAnodeWireOffset();
1001 Z -= ((Int_t)(2 * Z)) / 2.0;
1002 if (Z > 0.25) {
1003 Z = 0.5 - Z;
e23fbb27 1004 }
f881dc35 1005 // Use drift time map (GARFIELD)
1006 drifttime = TimeStruct(driftvelocity,time0-xyz[0]+kAmWidth,Z);
1007 }
1008 else {
1009 // Use constant drift velocity
1010 drifttime = TMath::Abs(time0 - xyz[0]) / driftvelocity;
1011 }
ccb4315c 1012
f881dc35 1013 // Apply the gas gain including fluctuations
1014 Double_t ggRndm = 0.0;
1015 do {
1016 ggRndm = gRandom->Rndm();
1017 } while (ggRndm <= 0);
1018 Int_t signal = (Int_t) (-(simParam->GetGasGain()) * TMath::Log(ggRndm));
1019
1020 // Apply the pad response
1021 if (simParam->PRFOn()) {
1022 // The distance of the electron to the center of the pad
1023 // in units of pad width
1024 Double_t dist = (colOffset - 0.5*padPlane->GetColSize(colE))
1025 / padPlane->GetColSize(colE);
1026 if (!(calibration->PadResponse(signal,dist,plane,padSignal))) continue;
1027 }
1028 else {
1029 padSignal[0] = 0.0;
1030 padSignal[1] = signal;
1031 padSignal[2] = 0.0;
1032 }
e23fbb27 1033
f881dc35 1034 // The time bin (always positive), with t0 correction
1035 Double_t timeBinIdeal = drifttime * samplingRate + t0;
1036 // Protection
1037 if (TMath::Abs(timeBinIdeal) > 2*nTimeTotal) {
1038 timeBinIdeal = 2 * nTimeTotal;
1039 }
1040 Int_t timeBinTruncated = (Int_t) timeBinIdeal;
1041 // The distance of the position to the middle of the timebin
1042 Double_t timeOffset = ((Float_t) timeBinTruncated
1043 + 0.5 - timeBinIdeal) / samplingRate;
6a739e92 1044
f881dc35 1045 // Sample the time response inside the drift region
1046 // + additional time bins before and after.
1047 // The sampling is done always in the middle of the time bin
1048 for (Int_t iTimeBin = TMath::Max(timeBinTruncated, 0);
1049 iTimeBin < TMath::Min(timeBinTruncated+timeBinTRFend,nTimeTotal);
1050 iTimeBin++) {
1051
1052 // Apply the time response
1053 Double_t timeResponse = 1.0;
1054 Double_t crossTalk = 0.0;
1055 Double_t time = (iTimeBin - timeBinTruncated) / samplingRate + timeOffset;
1056 if (simParam->TRFOn()) {
1057 timeResponse = simParam->TimeResponse(time);
1058 }
1059 if (simParam->CTOn()) {
1060 crossTalk = simParam->CrossTalk(time);
1061 }
e23fbb27 1062
f881dc35 1063 signalOld[0] = 0.0;
1064 signalOld[1] = 0.0;
1065 signalOld[2] = 0.0;
f7336fa3 1066
f881dc35 1067 for (iPad = 0; iPad < kNpad; iPad++) {
e23fbb27 1068
f881dc35 1069 Int_t colPos = colE + iPad - 1;
1070 if (colPos < 0) continue;
1071 if (colPos >= nColMax) break;
e23fbb27 1072
f881dc35 1073 // Add the signals
1074 Int_t iCurrentTimeBin = iTimeBin;
1075 signalOld[iPad] = signals->GetDataUnchecked(rowE,colPos,iCurrentTimeBin);
1076 if (colPos != colE) {
1077 signalOld[iPad] += padSignal[iPad] * (timeResponse + crossTalk);
1078 }
1079 else {
1080 signalOld[iPad] += padSignal[iPad] * timeResponse;
1081 }
1082 signals->SetDataUnchecked(rowE,colPos,iCurrentTimeBin,signalOld[iPad]);
1083
1084 // Store the track index in the dictionary
1085 // Note: We store index+1 in order to allow the array to be compressed
1086 if (signalOld[iPad] > 0) {
1087 for (iDict = 0; iDict < kNDict; iDict++) {
1088 Int_t oldTrack = dictionary[iDict]->GetDataUnchecked(rowE
1089 ,colPos
1090 ,iCurrentTimeBin);
1091 if (oldTrack == track+1) break;
1092 if (oldTrack == 0) {
1093 dictionary[iDict]->SetDataUnchecked(rowE,colPos,iCurrentTimeBin,track+1);
1094 break;
71d9fa7b 1095 }
1096 }
f881dc35 1097 }
872a7aba 1098
f881dc35 1099 } // Loop: pads
f7336fa3 1100
f881dc35 1101 } // Loop: time bins
f7336fa3 1102
f881dc35 1103 } // Loop: electrons of a single hit
f7336fa3 1104
e23fbb27 1105 hit = (AliTRDhit *) fTRD->NextHit();
f7336fa3 1106
e23fbb27 1107 } // Loop: hits of one primary track
1108
1109 } // Loop: primary tracks
1110
7925de54 1111 AliDebug(1,Form("Finished analyzing %d hits",countHits));
793ff80c 1112
0c24ba98 1113 // The coupling factor
3551db50 1114 Double_t coupling = simParam->GetPadCoupling()
9afbd7de 1115 * simParam->GetTimeCoupling();
0c24ba98 1116
1117 // The conversion factor
9afbd7de 1118 Double_t convert = kEl2fC
1119 * simParam->GetChipGain();
6244debe 1120
793ff80c 1121 // Loop through all chambers to finalize the digits
0c24ba98 1122 Int_t iDetBeg = 0;
1123 Int_t iDetEnd = AliTRDgeometry::Ndet();
0c24ba98 1124 for (Int_t iDet = iDetBeg; iDet < iDetEnd; iDet++) {
793ff80c 1125
4d18a639 1126 Int_t plane = fGeo->GetPlane(iDet);
1127 Int_t sector = fGeo->GetSector(iDet);
1128 Int_t chamber = fGeo->GetChamber(iDet);
1129 Int_t nRowMax = commonParam->GetRowMax(plane,chamber,sector);
1130 Int_t nColMax = commonParam->GetColMax(plane);
793ff80c 1131
4d18a639 1132 Double_t *inADC = new Double_t[nTimeTotal];
1133 Double_t *outADC = new Double_t[nTimeTotal];
e23fbb27 1134
793ff80c 1135 // Add a container for the digits of this detector
abaf1f1d 1136 digits = fDigitsManager->GetDigits(iDet);
793ff80c 1137 // Allocate memory space for the digits buffer
0c24ba98 1138 if (digits->GetNtime() == 0) {
1139 digits->Allocate(nRowMax,nColMax,nTimeTotal);
1140 }
0c24ba98 1141
793ff80c 1142 // Get the signal container
1143 signals = (AliTRDdataArrayF *) signalsArray->At(iDet);
1144 if (signals->GetNtime() == 0) {
1145 // Create missing containers
872a7aba 1146 signals->Allocate(nRowMax,nColMax,nTimeTotal);
793ff80c 1147 }
1148 else {
1149 // Expand the container if neccessary
1150 if (fCompress) signals->Expand();
1151 }
1152 // Create the missing dictionary containers
3becff3c 1153 for (iDict = 0; iDict < kNDict; iDict++) {
1154 dictionary[iDict] = fDigitsManager->GetDictionary(iDet,iDict);
1155 if (dictionary[iDict]->GetNtime() == 0) {
1156 dictionary[iDict]->Allocate(nRowMax,nColMax,nTimeTotal);
0c24ba98 1157 }
793ff80c 1158 }
f7336fa3 1159
793ff80c 1160 Int_t nDigits = 0;
1161
9afbd7de 1162 // Don't create noise in detectors that are switched off / not installed, etc.
6bf5f0ce 1163 if (( calibration->IsChamberInstalled(iDet)) &&
1164 (!calibration->IsChamberMasked(iDet)) &&
1165 ( fGeo->GetSMstatus(sector))) {
6244debe 1166
1167 // Create the digits for this chamber
872a7aba 1168 for (iRow = 0; iRow < nRowMax; iRow++ ) {
1169 for (iCol = 0; iCol < nColMax; iCol++ ) {
6244debe 1170
6bf5f0ce 1171 // Check whether pad is masked
1172 // Bridged pads are not considered yet!!!
1173 if (calibration->IsPadMasked(iDet,iCol,iRow)) continue;
9afbd7de 1174
e23fbb27 1175 // Create summable digits
1176 if (fSDigits) {
6244debe 1177
e23fbb27 1178 for (iTime = 0; iTime < nTimeTotal; iTime++) {
872a7aba 1179 Float_t signalAmp = signals->GetDataUnchecked(iRow,iCol,iTime);
abaf1f1d 1180 signalAmp *= fSDigitsScale;
e23fbb27 1181 signalAmp = TMath::Min(signalAmp,(Float_t) 1.0e9);
abaf1f1d 1182 Int_t adc = (Int_t) signalAmp;
4487dad0 1183 if (adc > 0) nDigits++;
872a7aba 1184 digits->SetDataUnchecked(iRow,iCol,iTime,adc);
c1e4b257 1185 }
6244debe 1186
e23fbb27 1187 }
1188 // Create normal digits
1189 else {
6244debe 1190
e23fbb27 1191 for (iTime = 0; iTime < nTimeTotal; iTime++) {
4d18a639 1192
e23fbb27 1193 Float_t signalAmp = signals->GetDataUnchecked(iRow,iCol,iTime);
11dc3a9e 1194
0c24ba98 1195 // Pad and time coupling
1196 signalAmp *= coupling;
11dc3a9e 1197
f881dc35 1198 Float_t padgain = calibration->GetGainFactor(iDet,iCol,iRow);
9afbd7de 1199 if (padgain <= 0) {
7925de54 1200 AliError(Form("Not a valid gain %f, %d %d %d",padgain,iDet,iCol,iRow));
7754cd1f 1201 }
7eea788e 1202 signalAmp *= padgain;
11dc3a9e 1203
7e582e9f 1204 // Add the noise, starting from minus ADC baseline in electrons
3551db50 1205 Double_t baselineEl = simParam->GetADCbaseline() * (simParam->GetADCinRange()
4d18a639 1206 / simParam->GetADCoutRange())
1207 / convert;
3551db50 1208 signalAmp = TMath::Max((Double_t) gRandom->Gaus(signalAmp,simParam->GetNoise())
7e582e9f 1209 ,-baselineEl);
6244debe 1210 // Convert to mV
1211 signalAmp *= convert;
7e582e9f 1212 // Add ADC baseline in mV
3551db50 1213 signalAmp += simParam->GetADCbaseline() * (simParam->GetADCinRange()
4d18a639 1214 / simParam->GetADCoutRange());
11dc3a9e 1215 // Convert to ADC counts. Set the overflow-bit fADCoutRange if the
6244debe 1216 // signal is larger than fADCinRange
1217 Int_t adc = 0;
3551db50 1218 if (signalAmp >= simParam->GetADCinRange()) {
1219 adc = ((Int_t) simParam->GetADCoutRange());
6244debe 1220 }
1221 else {
11dc3a9e 1222 adc = TMath::Nint(signalAmp * (simParam->GetADCoutRange()
4d18a639 1223 / simParam->GetADCinRange()));
6244debe 1224 }
11dc3a9e 1225
e23fbb27 1226 inADC[iTime] = adc;
1227 outADC[iTime] = adc;
4d18a639 1228
e23fbb27 1229 }
6244debe 1230
e23fbb27 1231 for (iTime = 0; iTime < nTimeTotal; iTime++) {
6244debe 1232 // Store the amplitude of the digit if above threshold
7925de54 1233 if ( outADC[iTime] > ( simParam->GetADCbaseline() + simParam->GetADCthreshold() ) ) {
6244debe 1234 nDigits++;
3583ac1a 1235 digits->SetDataUnchecked(iRow,iCol,iTime,((Int_t) outADC[iTime]));
6244debe 1236 }
6244debe 1237 }
1238
1239 }
e23fbb27 1240
6244debe 1241 }
793ff80c 1242 }
6244debe 1243
793ff80c 1244 }
1245
1246 // Compress the arrays
3becff3c 1247 digits->Compress(1,0);
1248 for (iDict = 0; iDict < kNDict; iDict++) {
1249 dictionary[iDict]->Compress(1,0);
1250 }
f7336fa3 1251
3becff3c 1252 totalSizeDigits += digits->GetSize();
1253 totalSizeDict0 += dictionary[0]->GetSize();
1254 totalSizeDict1 += dictionary[1]->GetSize();
1255 totalSizeDict2 += dictionary[2]->GetSize();
0c24ba98 1256
f881dc35 1257 if (nDigits > 0) {
1258 Float_t nPixel = nRowMax * nColMax * nTimeTotal;
7925de54 1259 AliDebug(1,Form("Found %d digits in detector %d (%3.0f)."
f881dc35 1260 ,nDigits,iDet
1261 ,100.0 * ((Float_t) nDigits) / nPixel));
1262 }
abaf1f1d 1263
9afbd7de 1264 if (fCompress) {
1265 signals->Compress(1,0);
1266 }
f7336fa3 1267
e23fbb27 1268 delete [] inADC;
1269 delete [] outADC;
1270
f7336fa3 1271 }
1272
0c24ba98 1273 if (signalsArray) {
1274 delete signalsArray;
1275 signalsArray = 0;
1276 }
1277
7925de54 1278 AliDebug(1,Form("Total number of analyzed hits = %d",countHits));
1279 AliDebug(1,Form("Total digits data size = %d, %d, %d, %d",totalSizeDigits
9afbd7de 1280 ,totalSizeDict0
1281 ,totalSizeDict1
1282 ,totalSizeDict2));
abaf1f1d 1283
1284 return kTRUE;
1285
1286}
1287
1288//_____________________________________________________________________________
1289void AliTRDdigitizer::AddSDigitsManager(AliTRDdigitsManager *man)
1290{
1291 //
1292 // Add a digits manager for s-digits to the input list.
1293 //
1294
1295 fSDigitsManagerList->Add(man);
1296
1297}
1298
b1113c6b 1299//_____________________________________________________________________________
1300void AliTRDdigitizer::DeleteSDigitsManager()
1301{
1302 //
1303 // Removes digits manager from the input list.
1304 //
1305
1306 fSDigitsManagerList->Delete();
1307
1308}
1309
abaf1f1d 1310//_____________________________________________________________________________
1311Bool_t AliTRDdigitizer::ConvertSDigits()
1312{
1313 //
1314 // Converts s-digits to normal digits
1315 //
1316
1317 // Number of track dictionary arrays
1318 const Int_t kNDict = AliTRDdigitsManager::kNDict;
1319
1320 // Converts number of electrons to fC
4d18a639 1321 const Double_t kEl2fC = 1.602e-19 * 1.0e15;
abaf1f1d 1322
1323 Int_t iDict = 0;
e23fbb27 1324 Int_t iRow;
1325 Int_t iCol;
1326 Int_t iTime;
abaf1f1d 1327
4d18a639 1328 AliTRDSimParam *simParam = AliTRDSimParam::Instance();
9afbd7de 1329 if (!simParam) {
7925de54 1330 AliError("Could not get simulation parameters");
3551db50 1331 return kFALSE;
1332 }
1333
4d18a639 1334 AliTRDCommonParam *commonParam = AliTRDCommonParam::Instance();
9afbd7de 1335 if (!commonParam) {
7925de54 1336 AliError("Could not get common parameters");
3551db50 1337 return kFALSE;
1338 }
1339
4d18a639 1340 AliTRDcalibDB *calibration = AliTRDcalibDB::Instance();
9afbd7de 1341 if (!calibration) {
7925de54 1342 AliError("Could not get calibration object");
3551db50 1343 return kFALSE;
1344 }
1345
abaf1f1d 1346 Double_t sDigitsScale = 1.0 / GetSDigitsScale();
3551db50 1347 Double_t noise = simParam->GetNoise();
1348 Double_t padCoupling = simParam->GetPadCoupling();
1349 Double_t timeCoupling = simParam->GetTimeCoupling();
1350 Double_t chipGain = simParam->GetChipGain();
0c24ba98 1351 Double_t coupling = padCoupling * timeCoupling;
1352 Double_t convert = kEl2fC * chipGain;
3551db50 1353 Double_t adcInRange = simParam->GetADCinRange();
1354 Double_t adcOutRange = simParam->GetADCoutRange();
1355 Int_t adcThreshold = simParam->GetADCthreshold();
1356 Int_t adcBaseline = simParam->GetADCbaseline();
9afbd7de 1357 Int_t nTimeTotal = calibration->GetNumberOfTimeBins();
1358
abaf1f1d 1359 AliTRDdataArrayI *digitsIn;
1360 AliTRDdataArrayI *digitsOut;
1361 AliTRDdataArrayI *dictionaryIn[kNDict];
1362 AliTRDdataArrayI *dictionaryOut[kNDict];
3551db50 1363
abaf1f1d 1364 // Loop through the detectors
1365 for (Int_t iDet = 0; iDet < AliTRDgeometry::Ndet(); iDet++) {
da581aea 1366
abaf1f1d 1367 Int_t plane = fGeo->GetPlane(iDet);
1368 Int_t sector = fGeo->GetSector(iDet);
1369 Int_t chamber = fGeo->GetChamber(iDet);
3551db50 1370 Int_t nRowMax = commonParam->GetRowMax(plane,chamber,sector);
1371 Int_t nColMax = commonParam->GetColMax(plane);
abaf1f1d 1372
e23fbb27 1373 Double_t *inADC = new Double_t[nTimeTotal];
1374 Double_t *outADC = new Double_t[nTimeTotal];
1375
abaf1f1d 1376 digitsIn = fSDigitsManager->GetDigits(iDet);
1377 digitsIn->Expand();
1378 digitsOut = fDigitsManager->GetDigits(iDet);
1379 digitsOut->Allocate(nRowMax,nColMax,nTimeTotal);
1380 for (iDict = 0; iDict < kNDict; iDict++) {
1381 dictionaryIn[iDict] = fSDigitsManager->GetDictionary(iDet,iDict);
1382 dictionaryIn[iDict]->Expand();
1383 dictionaryOut[iDict] = fDigitsManager->GetDictionary(iDet,iDict);
1384 dictionaryOut[iDict]->Allocate(nRowMax,nColMax,nTimeTotal);
1385 }
1386
6bf5f0ce 1387 // Don't create noise in detectors that are switched off / not installed, etc.
1388 if (( calibration->IsChamberInstalled(iDet)) &&
1389 (!calibration->IsChamberMasked(iDet)) &&
1390 ( fGeo->GetSMstatus(sector))) {
abaf1f1d 1391
6bf5f0ce 1392 for (iRow = 0; iRow < nRowMax; iRow++ ) {
1393 for (iCol = 0; iCol < nColMax; iCol++ ) {
9afbd7de 1394
6bf5f0ce 1395 // Check whether pad is masked
1396 // Bridged pads are not considered yet!!!
1397 if (calibration->IsPadMasked(iDet,iCol,iRow)) continue;
6bf5f0ce 1398
1399 for (iTime = 0; iTime < nTimeTotal; iTime++) {
1400
1401 // Scale s-digits to normal digits
1402 Double_t signal = (Double_t) digitsIn->GetDataUnchecked(iRow,iCol,iTime);
1403 signal *= sDigitsScale;
1404 // Apply the pad-by-pad gain factors
1405 Float_t padgain = calibration->GetGainFactor(iDet,iCol,iRow);
1406 if (padgain <= 0.0) {
7925de54 1407 AliError(Form("Not a valid gain %f, %d %d %d",padgain,iDet,iCol,iRow));
6bf5f0ce 1408 }
1409 signal *= padgain;
1410 // Pad and time coupling
1411 signal *= coupling;
1412 // Add the noise, starting from minus ADC baseline in electrons
1413 Double_t baselineEl = adcBaseline * (adcInRange / adcOutRange) / convert;
1414 signal = TMath::Max((Double_t) gRandom->Gaus(signal,noise),-baselineEl);
1415 // Convert to mV
1416 signal *= convert;
1417 // add ADC baseline in mV
1418 signal += adcBaseline * (adcInRange / adcOutRange);
1419 // Convert to ADC counts. Set the overflow-bit adcOutRange if the
1420 // signal is larger than adcInRange
1421 Int_t adc = 0;
1422 if (signal >= adcInRange) {
1423 adc = ((Int_t) adcOutRange);
1424 }
1425 else {
1426 adc = TMath::Nint(signal * (adcOutRange / adcInRange));
1427 }
1428 inADC[iTime] = adc;
1429 outADC[iTime] = adc;
9afbd7de 1430
6bf5f0ce 1431 }
e23fbb27 1432
6bf5f0ce 1433 for (iTime = 0; iTime < nTimeTotal; iTime++) {
1434 // Store the amplitude of the digit if above threshold
7925de54 1435 if (outADC[iTime] > (adcBaseline + adcThreshold)) {
6bf5f0ce 1436 digitsOut->SetDataUnchecked(iRow,iCol,iTime,((Int_t) outADC[iTime]));
1437 // Copy the dictionary
1438 for (iDict = 0; iDict < kNDict; iDict++) {
1439 Int_t track = dictionaryIn[iDict]->GetDataUnchecked(iRow,iCol,iTime);
1440 dictionaryOut[iDict]->SetDataUnchecked(iRow,iCol,iTime,track);
1441 }
e23fbb27 1442 }
abaf1f1d 1443 }
e23fbb27 1444
6bf5f0ce 1445 }
abaf1f1d 1446 }
6bf5f0ce 1447
abaf1f1d 1448 }
1449
1450 if (fCompress) {
1451 digitsIn->Compress(1,0);
1452 digitsOut->Compress(1,0);
1453 for (iDict = 0; iDict < kNDict; iDict++) {
1454 dictionaryIn[iDict]->Compress(1,0);
1455 dictionaryOut[iDict]->Compress(1,0);
1456 }
1457 }
1458
e23fbb27 1459 delete [] inADC;
1460 delete [] outADC;
1461
abaf1f1d 1462 }
f7336fa3 1463
1464 return kTRUE;
1465
1466}
1467
16bf9884 1468//_____________________________________________________________________________
abaf1f1d 1469Bool_t AliTRDdigitizer::MergeSDigits()
16bf9884 1470{
1471 //
abaf1f1d 1472 // Merges the input s-digits:
1473 // - The amplitude of the different inputs are summed up.
1474 // - Of the track IDs from the input dictionaries only one is
1475 // kept for each input. This works for maximal 3 different merged inputs.
16bf9884 1476 //
1477
abaf1f1d 1478 // Number of track dictionary arrays
1479 const Int_t kNDict = AliTRDdigitsManager::kNDict;
1480
4d18a639 1481 AliTRDSimParam *simParam = AliTRDSimParam::Instance();
9afbd7de 1482 if (!simParam) {
7925de54 1483 AliError("Could not get simulation parameters");
3551db50 1484 return kFALSE;
1485 }
1486
4d18a639 1487 AliTRDCommonParam *commonParam = AliTRDCommonParam::Instance();
9afbd7de 1488 if (!commonParam) {
7925de54 1489 AliError("Could not get common parameters");
3551db50 1490 return kFALSE;
1491 }
1492
4d18a639 1493 AliTRDcalibDB *calibration = AliTRDcalibDB::Instance();
9afbd7de 1494 if (!calibration) {
7925de54 1495 AliError("Could not get calibration object");
3551db50 1496 return kFALSE;
1497 }
1498
abaf1f1d 1499 Int_t iDict = 0;
e23fbb27 1500 Int_t jDict = 0;
abaf1f1d 1501
1502 AliTRDdataArrayI *digitsA;
1503 AliTRDdataArrayI *digitsB;
1504 AliTRDdataArrayI *dictionaryA[kNDict];
1505 AliTRDdataArrayI *dictionaryB[kNDict];
1506
1507 // Get the first s-digits
1508 fSDigitsManager = (AliTRDdigitsManager *) fSDigitsManagerList->First();
9afbd7de 1509 if (!fSDigitsManager) {
7925de54 1510 AliError("No SDigits manager");
9afbd7de 1511 return kFALSE;
1512 }
abaf1f1d 1513
1514 // Loop through the other sets of s-digits
1515 AliTRDdigitsManager *mergeSDigitsManager;
4d18a639 1516 mergeSDigitsManager = (AliTRDdigitsManager *)
1517 fSDigitsManagerList->After(fSDigitsManager);
abaf1f1d 1518
9afbd7de 1519 if (mergeSDigitsManager) {
7925de54 1520 AliDebug(1,Form("Merge %d input files.",fSDigitsManagerList->GetSize()));
9afbd7de 1521 }
1522 else {
7925de54 1523 AliDebug(1,"Only one input file.");
abaf1f1d 1524 }
1525
3551db50 1526 Int_t nTimeTotal = calibration->GetNumberOfTimeBins();
1527
abaf1f1d 1528 Int_t iMerge = 0;
1529 while (mergeSDigitsManager) {
1530
1531 iMerge++;
1532
1533 // Loop through the detectors
1534 for (Int_t iDet = 0; iDet < AliTRDgeometry::Ndet(); iDet++) {
1535
4d18a639 1536 Int_t plane = fGeo->GetPlane(iDet);
1537 Int_t sector = fGeo->GetSector(iDet);
1538 Int_t chamber = fGeo->GetChamber(iDet);
1539 Int_t nRowMax = commonParam->GetRowMax(plane,chamber,sector);
1540 Int_t nColMax = commonParam->GetColMax(plane);
abaf1f1d 1541
1542 // Loop through the pixels of one detector and add the signals
1543 digitsA = fSDigitsManager->GetDigits(iDet);
1544 digitsB = mergeSDigitsManager->GetDigits(iDet);
1545 digitsA->Expand();
1546 digitsB->Expand();
1547 for (iDict = 0; iDict < kNDict; iDict++) {
1548 dictionaryA[iDict] = fSDigitsManager->GetDictionary(iDet,iDict);
1549 dictionaryB[iDict] = mergeSDigitsManager->GetDictionary(iDet,iDict);
1550 dictionaryA[iDict]->Expand();
1551 dictionaryB[iDict]->Expand();
1552 }
1553
4487dad0 1554 // Merge only detectors that contain a signal
1555 Bool_t doMerge = kTRUE;
1556 if (fMergeSignalOnly) {
1557 if (digitsA->GetOverThreshold(0) == 0) {
1558 doMerge = kFALSE;
1559 }
abaf1f1d 1560 }
1561
4487dad0 1562 if (doMerge) {
abaf1f1d 1563
7925de54 1564 AliDebug(1,Form("Merge detector %d of input no.%d",iDet,iMerge+1));
abaf1f1d 1565
4487dad0 1566 for (Int_t iRow = 0; iRow < nRowMax; iRow++ ) {
1567 for (Int_t iCol = 0; iCol < nColMax; iCol++ ) {
1568 for (Int_t iTime = 0; iTime < nTimeTotal; iTime++) {
1569
1570 // Add the amplitudes of the summable digits
1571 Int_t ampA = digitsA->GetDataUnchecked(iRow,iCol,iTime);
1572 Int_t ampB = digitsB->GetDataUnchecked(iRow,iCol,iTime);
1573 ampA += ampB;
1574 digitsA->SetDataUnchecked(iRow,iCol,iTime,ampA);
1575
9afbd7de 1576 // Add the mask to the track id if defined.
4487dad0 1577 for (iDict = 0; iDict < kNDict; iDict++) {
1578 Int_t trackB = dictionaryB[iDict]->GetDataUnchecked(iRow,iCol,iTime);
1579 if ((fMasks) && (trackB > 0)) {
1580 for (jDict = 0; jDict < kNDict; jDict++) {
1581 Int_t trackA = dictionaryA[iDict]->GetDataUnchecked(iRow,iCol,iTime);
1582 if (trackA == 0) {
1583 trackA = trackB + fMasks[iMerge];
1584 dictionaryA[iDict]->SetDataUnchecked(iRow,iCol,iTime,trackA);
1585 }
1586 }
1587 }
e23fbb27 1588 }
abaf1f1d 1589
4487dad0 1590 }
abaf1f1d 1591 }
4487dad0 1592 }
1593
abaf1f1d 1594 }
1595
1596 if (fCompress) {
1597 digitsA->Compress(1,0);
1598 digitsB->Compress(1,0);
1599 for (iDict = 0; iDict < kNDict; iDict++) {
1600 dictionaryA[iDict]->Compress(1,0);
1601 dictionaryB[iDict]->Compress(1,0);
1602 }
1603 }
1604
1605 }
1606
1607 // The next set of s-digits
4d18a639 1608 mergeSDigitsManager = (AliTRDdigitsManager *)
1609 fSDigitsManagerList->After(mergeSDigitsManager);
abaf1f1d 1610
1611 }
1612
16bf9884 1613 return kTRUE;
1614
1615}
1616
abaf1f1d 1617//_____________________________________________________________________________
1618Bool_t AliTRDdigitizer::SDigits2Digits()
1619{
1620 //
1621 // Merges the input s-digits and converts them to normal digits
1622 //
1623
4d18a639 1624 if (!MergeSDigits()) {
1625 return kFALSE;
1626 }
abaf1f1d 1627
1628 return ConvertSDigits();
1629
1630}
1631
f7336fa3 1632//_____________________________________________________________________________
0a29d0f1 1633Bool_t AliTRDdigitizer::WriteDigits() const
f7336fa3 1634{
1635 //
1636 // Writes out the TRD-digits and the dictionaries
1637 //
1638
4d18a639 1639 // Write parameters
bdbb05bb 1640 fRunLoader->CdGAFile();
bdbb05bb 1641
da581aea 1642 // Store the digits and the dictionary in the tree
abaf1f1d 1643 return fDigitsManager->WriteDigits();
f7336fa3 1644
1645}
793ff80c 1646
8e64dd77 1647//_____________________________________________________________________________
88cb7938 1648void AliTRDdigitizer::InitOutput(Int_t iEvent)
8e64dd77 1649{
1650 //
1651 // Initializes the output branches
1652 //
1653
1654 fEvent = iEvent;
88cb7938 1655
9afbd7de 1656 if (!fRunLoader) {
1657 AliError("Run Loader is NULL");
1658 return;
1659 }
1660
88cb7938 1661 AliLoader* loader = fRunLoader->GetLoader("TRDLoader");
9afbd7de 1662 if (!loader) {
1663 AliError("Can not get TRD loader from Run Loader");
1664 return;
1665 }
88cb7938 1666
4d18a639 1667 TTree *tree = 0;
88cb7938 1668
9afbd7de 1669 if (fSDigits) {
1670 // If we produce SDigits
88cb7938 1671 tree = loader->TreeS();
9afbd7de 1672 if (!tree) {
88cb7938 1673 loader->MakeTree("S");
1674 tree = loader->TreeS();
9afbd7de 1675 }
1676 }
1677 else {
1678 // If we produce Digits
1679 tree = loader->TreeD();
1680 if (!tree) {
1681 loader->MakeTree("D");
1682 tree = loader->TreeD();
1683 }
1684 }
1685
88cb7938 1686 fDigitsManager->SetEvent(iEvent);
1687 fDigitsManager->MakeBranch(tree);
8e64dd77 1688
1689}
3551db50 1690
1691//_____________________________________________________________________________
1692Double_t AliTRDdigitizer::TimeStruct(Float_t vdrift, Double_t dist, Double_t z)
1693{
1694 //
1695 // Applies the time structure of the drift cells (by C.Lippmann).
1696 // The drift time of electrons to the anode wires depends on the
1697 // distance to the wire (z) and on the position in the drift region.
1698 //
1699 // input :
1700 // dist = radial distance from (cathode) pad plane [cm]
1701 // z = distance from anode wire (parallel to cathode planes) [cm]
1702 //
1703 // output :
1704 // tdrift = the drift time of an electron at the given position
1705 //
1706 // We interpolate between the drift time values at the two drift
1707 // velocities fVDlo and fVDhi, being smaller and larger than
1708 // fDriftVelocity. We use the two stored drift time maps fTimeStruct1
1709 // and fTimeStruct2, calculated for the two mentioned drift velocities.
1710 //
1711
1712 SampleTimeStruct(vdrift);
1713
4d18a639 1714 // Indices:
1715 Int_t r1 = (Int_t)(10 * dist);
9afbd7de 1716 if (r1 < 0) r1 = 0;
1717 if (r1 > 37) r1 = 37;
1718 Int_t r2 = r1 + 1;
1719 if (r2 < 0) r2 = 0;
1720 if (r2 > 37) r2 = 37;
1721 const Int_t kz1 = ((Int_t)(100 * z / 2.5));
1722 const Int_t kz2 = kz1 + 1;
1723
4d18a639 1724 if ((r1 < 0) ||
1725 (r1 > 37) ||
1726 (kz1 < 0) ||
1727 (kz1 > 10)) {
7925de54 1728 AliWarning(Form("Indices out of range: dist=%.2f, z=%.2f, r1=%d, kz1=%d"
9afbd7de 1729 ,dist,z,r1,kz1));
3551db50 1730 }
1731
4d18a639 1732 const Float_t ky111 = fTimeStruct1[r1+38*kz1];
9afbd7de 1733 const Float_t ky221 = ((r2 <= 37) && (kz2 <= 10))
4d18a639 1734 ? fTimeStruct1[r2+38*kz2]
1735 : fTimeStruct1[37+38*10];
9afbd7de 1736 const Float_t ky121 = (kz2 <= 10)
4d18a639 1737 ? fTimeStruct1[r1+38*kz2]
1738 : fTimeStruct1[r1+38*10];
9afbd7de 1739 const Float_t ky211 = (r2 <= 37)
4d18a639 1740 ? fTimeStruct1[r2+38*kz1]
1741 : fTimeStruct1[37+38*kz1];
3551db50 1742
1743 // 2D Interpolation, lower drift time map
1744 const Float_t ky11 = (ky211-ky111)*10*dist + ky111 - (ky211-ky111)*r1;
1745 const Float_t ky21 = (ky221-ky121)*10*dist + ky121 - (ky221-ky121)*r1;
1746
4d18a639 1747 const Float_t ky112 = fTimeStruct2[r1+38*kz1];
9afbd7de 1748 const Float_t ky222 = ((r2 <= 37) && (kz2 <= 10))
4d18a639 1749 ? fTimeStruct2[r2+38*kz2]
1750 : fTimeStruct2[37+38*10];
9afbd7de 1751 const Float_t ky122 = (kz2 <= 10)
4d18a639 1752 ? fTimeStruct2[r1+38*kz2]
1753 : fTimeStruct2[r1+38*10];
9afbd7de 1754 const Float_t ky212 = (r2 <= 37)
4d18a639 1755 ? fTimeStruct2[r2+38*kz1]
1756 : fTimeStruct2[37+38*kz1];
3551db50 1757
1758 // 2D Interpolation, larger drift time map
1759 const Float_t ky12 = (ky212-ky112)*10*dist + ky112 - (ky212-ky112)*r1;
1760 const Float_t ky22 = (ky222-ky122)*10*dist + ky122 - (ky222-ky122)*r1;
1761
4d18a639 1762 // Dist now is the drift distance to the anode wires (negative if electrons are
3551db50 1763 // between anode wire plane and cathode pad plane)
9afbd7de 1764 dist -= AliTRDgeometry::AmThick() / 2.0;
3551db50 1765
1766 // Get the drift times for the drift velocities fVDlo and fVDhi
9afbd7de 1767 const Float_t ktdrift1 = ((TMath::Abs(dist) > 0.005) || (z > 0.005))
1768 ? (ky21 - ky11) * 100 * z / 2.5 + ky11 - (ky21 - ky11) * kz1
1769 : 0.0;
1770 const Float_t ktdrift2 = ((TMath::Abs(dist) > 0.005) || (z > 0.005))
1771 ? (ky22 - ky12) * 100 * z / 2.5 + ky12 - (ky22 - ky12) * kz1
1772 : 0.0;
3551db50 1773
1774 // 1D Interpolation between the values at fVDlo and fVDhi
4d18a639 1775 Float_t a = (ktdrift2 - ktdrift1)
1776 / (fVDhi - fVDlo);
1777 Float_t b = ktdrift2 - a * fVDhi;
3551db50 1778
3551db50 1779 return a * vdrift + b;
1780
1781}
1782
1783//_____________________________________________________________________________
1784void AliTRDdigitizer::SampleTimeStruct(Float_t vdrift)
1785{
1786 //
1787 // Samples the timing structure of a drift cell
1788 // Drift Time data calculated with Garfield (by C.Lippmann)
1789 //
1790
9afbd7de 1791 // TODO make caching proper, if same timing structure is selected: do not update timestructs!
3551db50 1792
9afbd7de 1793 // Noting to do
4d18a639 1794 if (vdrift == fTimeLastVdrift) {
3551db50 1795 return;
9afbd7de 1796 }
3551db50 1797
4d18a639 1798 fTimeLastVdrift = vdrift;
3551db50 1799
9afbd7de 1800 // Drift time maps are saved for some drift velocity values (in drift region):
3551db50 1801 Float_t fVDsmp[8];
1802 fVDsmp[0] = 1.032;
1803 fVDsmp[1] = 1.158;
1804 fVDsmp[2] = 1.299;
1805 fVDsmp[3] = 1.450;
1806 fVDsmp[4] = 1.610;
1807 fVDsmp[5] = 1.783;
1808 fVDsmp[6] = 1.959;
1809 fVDsmp[7] = 2.134;
1810
9afbd7de 1811 if (vdrift < fVDsmp[0]) {
7925de54 1812 AliWarning(Form("Drift Velocity too small (%.3f<%.3f)",vdrift,fVDsmp[0]));
3551db50 1813 vdrift = fVDsmp[0];
9afbd7de 1814 }
1815 else if (vdrift > fVDsmp[7]) {
7925de54 1816 AliWarning(Form("Drift Velocity too large (%.3f>%.3f)",vdrift,fVDsmp[6]));
3551db50 1817 vdrift = fVDsmp[7];
1818 }
1819
1820 const Int_t ktimebin = 38;
9afbd7de 1821 const Int_t kZbin = 11;
3551db50 1822
1823 // Garfield simulation at UD = -1500V; vd = 1.032cm/microsec, <driftfield> = 525V/cm
1824 Float_t time1500[ktimebin][kZbin] =
1825 {{0.09170, 0.09205, 0.09306, 0.09475, 0.09716, 0.10035,
1826 0.10445, 0.10993, 0.11838, 0.13986, 0.37858},
1827 {0.06588, 0.06626, 0.06739, 0.06926, 0.07186, 0.07524,
1828 0.07951, 0.08515, 0.09381, 0.11601, 0.35673},
1829 {0.03946, 0.04003, 0.04171, 0.04435, 0.04780, 0.05193,
1830 0.05680, 0.06306, 0.07290, 0.09873, 0.34748},
1831 {0.01151, 0.01283, 0.01718, 0.02282, 0.02880, 0.03479,
1832 0.04098, 0.04910, 0.06413, 0.10567, 0.36897},
1833 {0.01116, 0.01290, 0.01721, 0.02299, 0.02863, 0.03447,
1834 0.04074, 0.04984, 0.06839, 0.11625, 0.37277},
1835 {0.03919, 0.03974, 0.04131, 0.04380, 0.04703, 0.05102,
1836 0.05602, 0.06309, 0.07651, 0.10938, 0.36838},
1837 {0.06493, 0.06560, 0.06640, 0.06802, 0.07051, 0.07392,
1838 0.07853, 0.08510, 0.09690, 0.12621, 0.38058},
1839 {0.09174, 0.09186, 0.09225, 0.09303, 0.09477, 0.00000,
1840 0.11205, 0.11952, 0.13461, 0.16984, 0.43017},
1841 {0.14356, 0.14494, 0.14959, 0.16002, 0.18328, 0.27981,
1842 0.22785, 0.21240, 0.21948, 0.25965, 0.52392},
1843 {0.23120, 0.23366, 0.24046, 0.25422, 0.28071, 0.36914,
1844 0.32999, 0.31208, 0.31772, 0.35804, 0.62249},
1845 {0.32686, 0.32916, 0.33646, 0.35053, 0.37710, 0.46292,
1846 0.42773, 0.40948, 0.41497, 0.45527, 0.71955},
1847 {0.42353, 0.42583, 0.43317, 0.44727, 0.47380, 0.55884,
1848 0.52479, 0.50650, 0.51194, 0.55225, 0.81658},
1849 {0.52038, 0.52271, 0.53000, 0.54415, 0.57064, 0.65545,
1850 0.62172, 0.60341, 0.60885, 0.64915, 0.91339},
1851 {0.61724, 0.61953, 0.62694, 0.64098, 0.66756, 0.75226,
1852 0.71862, 0.70030, 0.70575, 0.74604, 1.01035},
1853 {0.71460, 0.71678, 0.72376, 0.73786, 0.76447, 0.84913,
1854 0.81551, 0.79720, 0.80264, 0.84292, 1.10723},
1855 {0.81101, 0.81334, 0.82066, 0.83475, 0.86127, 0.94599,
1856 0.91240, 0.89408, 0.89952, 0.93981, 1.20409},
1857 {0.90788, 0.91023, 0.91752, 0.93163, 0.95815, 1.04293,
1858 1.00929, 0.99096, 0.99640, 1.03669, 1.30106},
1859 {1.00477, 1.00707, 1.01449, 1.02852, 1.05504, 1.13976,
1860 1.10617, 1.08784, 1.09329, 1.13358, 1.39796},
1861 {1.10166, 1.10397, 1.11130, 1.12541, 1.15257, 1.23672,
1862 1.20307, 1.18472, 1.19018, 1.23046, 1.49486},
1863 {1.19854, 1.20084, 1.20818, 1.22235, 1.24885, 1.33355,
1864 1.29992, 1.28156, 1.28707, 1.32735, 1.59177},
1865 {1.29544, 1.29780, 1.30507, 1.31917, 1.34575, 1.43073,
1866 1.39681, 1.37851, 1.38396, 1.42377, 1.68854},
1867 {1.39236, 1.39462, 1.40205, 1.41607, 1.44259, 1.52745,
1868 1.49368, 1.47541, 1.48083, 1.52112, 1.78546},
1869 {1.49314, 1.49149, 1.49885, 1.51297, 1.53949, 1.62420,
1870 1.59016, 1.57231, 1.57772, 1.61800, 1.88048},
1871 {1.58610, 1.58839, 1.59572, 1.60983, 1.63635, 1.72109,
1872 1.68651, 1.66921, 1.67463, 1.71489, 1.97918},
1873 {1.68400, 1.68529, 1.69261, 1.70671, 1.73331, 1.81830,
1874 1.78341, 1.76605, 1.77150, 1.81179, 2.07608},
1875 {1.77991, 1.78215, 1.78952, 1.80385, 1.83014, 1.91486,
1876 1.88128, 1.86215, 1.86837, 1.90865, 2.17304},
1877 {1.87674, 1.87904, 1.88647, 1.90052, 1.92712, 2.01173,
1878 1.97812, 1.95905, 1.96527, 2.00710, 2.26979},
1879 {1.97369, 1.97594, 1.98326, 1.99869, 2.02442, 2.10865,
1880 2.07501, 2.05666, 2.06214, 2.10243, 2.36669},
1881 {2.07052, 2.07281, 2.08016, 2.09425, 2.12132, 2.20555,
1882 2.17182, 2.15341, 2.15904, 2.19933, 2.46363},
1883 {2.16742, 2.16971, 2.17707, 2.19114, 2.21766, 2.30240,
1884 2.26877, 2.25015, 2.25573, 2.29586, 2.56060},
1885 {2.26423, 2.26659, 2.27396, 2.28803, 2.31456, 2.40828,
1886 2.36567, 2.34705, 2.35282, 2.39765, 2.65744},
1887 {2.36153, 2.36349, 2.37330, 2.38501, 2.41159, 2.49940,
1888 2.46257, 2.44420, 2.44843, 2.48987, 2.75431},
1889 {2.46558, 2.46035, 2.46822, 2.48181, 2.50849, 2.59630,
1890 2.55947, 2.54112, 2.54513, 2.58677, 2.85094},
1891 {2.56248, 2.55723, 2.56486, 2.57871, 2.60520, 2.68998,
1892 2.65626, 2.63790, 2.64316, 2.68360, 2.94813},
1893 {2.65178, 2.65441, 2.66153, 2.67556, 2.70210, 2.78687,
1894 2.75319, 2.73463, 2.74032, 2.78060, 3.04503},
1895 {2.74868, 2.75131, 2.75870, 2.77245, 2.79385, 2.88700,
1896 2.85009, 2.83177, 2.83723, 2.87750, 3.14193},
1897 {2.84574, 2.84789, 2.85560, 2.86935, 2.89075, 2.98060,
1898 2.94576, 2.92868, 2.93356, 2.97436, 3.23868},
1899 {2.94239, 2.94469, 2.95221, 2.96625, 2.99345, 3.07747,
1900 3.04266, 3.02545, 3.03051, 3.07118, 3.33555}};
1901
1902 // Garfield simulation at UD = -1600V; vd = 1.158cm/microsec, <driftfield> = 558V/cm
1903 Float_t time1600[ktimebin][kZbin] =
1904 {{0.09169, 0.09203, 0.09305, 0.09473, 0.09714, 0.10032,
1905 0.10441, 0.10990, 0.11835, 0.13986, 0.37845},
1906 {0.06589, 0.06626, 0.06738, 0.06924, 0.07184, 0.07521,
1907 0.07947, 0.08512, 0.09379, 0.11603, 0.35648},
1908 {0.03947, 0.04003, 0.04171, 0.04434, 0.04778, 0.05190,
1909 0.05678, 0.06304, 0.07292, 0.09876, 0.34759},
1910 {0.01111, 0.01281, 0.01718, 0.02281, 0.02879, 0.03477,
1911 0.04097, 0.04910, 0.06415, 0.10573, 0.36896},
1912 {0.01120, 0.01311, 0.01721, 0.02279, 0.02862, 0.03446,
1913 0.04074, 0.04981, 0.06825, 0.11595, 0.37255},
1914 {0.03919, 0.03980, 0.04132, 0.04380, 0.04704, 0.05102,
1915 0.05602, 0.06302, 0.07633, 0.10896, 0.36743},
1916 {0.06531, 0.06528, 0.06631, 0.06805, 0.07053, 0.07392,
1917 0.07853, 0.08505, 0.09669, 0.12578, 0.37967},
1918 {0.09157, 0.09171, 0.09216, 0.09301, 0.09475, 0.00000,
1919 0.11152, 0.11879, 0.13352, 0.16802, 0.42750},
1920 {0.13977, 0.14095, 0.14509, 0.15433, 0.17534, 0.26406,
1921 0.21660, 0.20345, 0.21113, 0.25067, 0.51434},
1922 {0.21816, 0.22041, 0.22631, 0.23850, 0.26208, 0.34340,
1923 0.30755, 0.29237, 0.29878, 0.33863, 0.60258},
1924 {0.30344, 0.30547, 0.31241, 0.32444, 0.34809, 0.42696,
1925 0.39464, 0.37919, 0.38546, 0.42530, 0.68926},
1926 {0.38969, 0.39164, 0.39810, 0.41059, 0.43441, 0.51246,
1927 0.48112, 0.46562, 0.47191, 0.51172, 0.77558},
1928 {0.47592, 0.47799, 0.48442, 0.49689, 0.52061, 0.59855,
1929 0.56752, 0.55201, 0.55826, 0.59808, 0.86202},
1930 {0.56226, 0.56428, 0.57074, 0.58324, 0.60696, 0.68483,
1931 0.65388, 0.63837, 0.64461, 0.68445, 0.94830},
1932 {0.64881, 0.65063, 0.65709, 0.66958, 0.69331, 0.77117,
1933 0.74023, 0.72472, 0.73098, 0.77079, 1.03486},
1934 {0.73506, 0.73698, 0.74344, 0.75596, 0.77964, 0.85751,
1935 0.82658, 0.81107, 0.81731, 0.85712, 1.12106},
1936 {0.82132, 0.82333, 0.82979, 0.84228, 0.86608, 0.94386,
1937 0.91293, 0.89742, 0.90367, 0.94335, 1.20737},
1938 {0.90767, 0.90968, 0.91614, 0.92863, 0.95236, 1.03021,
1939 0.99928, 0.98377, 0.99001, 1.02984, 1.29371},
1940 {0.99410, 0.99602, 1.00257, 1.01498, 1.03869, 1.11720,
1941 1.08563, 1.07011, 1.07637, 1.11621, 1.37873},
1942 {1.08036, 1.08240, 1.08884, 1.10138, 1.12504, 1.20301,
1943 1.17198, 1.15647, 1.16272, 1.20255, 1.46651},
1944 {1.16670, 1.16872, 1.17525, 1.18783, 1.21139, 1.28934,
1945 1.25833, 1.24281, 1.24909, 1.28889, 1.55275},
1946 {1.25307, 1.25510, 1.26153, 1.27404, 1.29773, 1.37584,
1947 1.34469, 1.32916, 1.33536, 1.37524, 1.63915},
1948 {1.33942, 1.34146, 1.34788, 1.36040, 1.38410, 1.46438,
1949 1.43105, 1.41537, 1.42176, 1.46158, 1.72538},
1950 {1.42579, 1.42782, 1.43458, 1.44674, 1.47043, 1.55085,
1951 1.51675, 1.50168, 1.50810, 1.54793, 1.81174},
1952 {1.51207, 1.51454, 1.52060, 1.53307, 1.55684, 1.63478,
1953 1.60336, 1.58820, 1.59446, 1.63414, 1.89814},
1954 {1.59856, 1.60047, 1.60693, 1.61942, 1.64317, 1.72257,
1955 1.69008, 1.67454, 1.68080, 1.72063, 1.98433},
1956 {1.68481, 1.68682, 1.69330, 1.70584, 1.72949, 1.80752,
1957 1.77643, 1.76089, 1.76716, 1.80692, 2.07069},
1958 {1.77117, 1.77319, 1.77969, 1.79260, 1.81583, 1.89376,
1959 1.86226, 1.84720, 1.85355, 1.89256, 2.15343},
1960 {1.85748, 1.85967, 1.86605, 1.87848, 1.90222, 1.98010,
1961 1.94913, 1.93271, 1.93981, 1.97968, 2.24355},
1962 {1.94386, 1.94587, 1.95233, 1.96484, 1.98854, 2.06646,
1963 2.03542, 2.01755, 2.02617, 2.06604, 2.32993},
1964 {2.03022, 2.03230, 2.03868, 2.05134, 2.07488, 2.15367,
1965 2.12178, 2.10391, 2.11252, 2.15432, 2.41623},
1966 {2.11656, 2.11857, 2.12505, 2.13772, 2.16147, 2.23919,
1967 2.20817, 2.19265, 2.20744, 2.23872, 2.49996},
1968 {2.20291, 2.20611, 2.21137, 2.22387, 2.24758, 2.32563,
1969 2.29450, 2.27901, 2.28525, 2.32507, 2.58897},
1970 {2.28922, 2.29172, 2.29774, 2.31345, 2.33400, 2.41287,
1971 2.38086, 2.36535, 2.37160, 2.40869, 2.67113},
1972 {2.37572, 2.37764, 2.38410, 2.39803, 2.42046, 2.49817,
1973 2.46721, 2.45171, 2.45794, 2.49505, 2.76061},
1974 {2.46190, 2.46396, 2.47043, 2.48340, 2.50665, 2.58453,
1975 2.55357, 2.53728, 2.54430, 2.58407, 2.84816},
1976 {2.54833, 2.55032, 2.55679, 2.56976, 2.59312, 2.67103,
1977 2.63993, 2.62364, 2.63062, 2.67040, 2.93444},
1978 {2.63456, 2.63660, 2.64304, 2.65555, 2.67938, 2.75739,
1979 2.72629, 2.71064, 2.71688, 2.75671, 3.01886}};
1980
1981 // Garfield simulation at UD = -1700V; vd = 1.299cm/microsec, <driftfield> = 590V/cm
1982 Float_t time1700[ktimebin][kZbin] =
1983 {{0.09167, 0.09201, 0.09302, 0.09471, 0.09712, 0.10029,
1984 0.10438, 0.10986, 0.11832, 0.13986, 0.37824},
1985 {0.06591, 0.06626, 0.06736, 0.06923, 0.07183, 0.07519,
1986 0.07944, 0.08511, 0.09378, 0.11603, 0.35625},
1987 {0.03946, 0.04003, 0.04170, 0.04433, 0.04777, 0.05189,
1988 0.05676, 0.06301, 0.07291, 0.09880, 0.34724},
1989 {0.01110, 0.01281, 0.01718, 0.02280, 0.02879, 0.03476,
1990 0.04096, 0.04910, 0.06417, 0.10582, 0.36861},
1991 {0.01115, 0.01294, 0.01721, 0.02276, 0.02862, 0.03447,
1992 0.04074, 0.04980, 0.06812, 0.11565, 0.37231},
1993 {0.03920, 0.03974, 0.04133, 0.04381, 0.04706, 0.05105,
1994 0.05603, 0.06299, 0.07618, 0.10860, 0.36646},
1995 {0.06498, 0.06529, 0.06634, 0.06808, 0.07055, 0.07395,
1996 0.07852, 0.08500, 0.09650, 0.12532, 0.37850},
1997 {0.09143, 0.09159, 0.09207, 0.09297, 0.09473, 0.00000,
1998 0.11102, 0.11809, 0.13245, 0.16627, 0.42496},
1999 {0.13646, 0.13750, 0.14112, 0.14926, 0.16806, 0.24960,
2000 0.20627, 0.19536, 0.20366, 0.24256, 0.50557},
2001 {0.20678, 0.20848, 0.21384, 0.22450, 0.24552, 0.32018,
2002 0.28740, 0.27477, 0.28196, 0.32128, 0.58475},
2003 {0.28287, 0.28461, 0.29020, 0.30108, 0.32224, 0.39467,
2004 0.36500, 0.35217, 0.35926, 0.39860, 0.66194},
2005 {0.35972, 0.36145, 0.36713, 0.37797, 0.39912, 0.47091,
2006 0.44212, 0.42925, 0.43632, 0.47563, 0.73892},
2007 {0.43667, 0.43841, 0.44413, 0.45494, 0.47607, 0.54780,
2008 0.51912, 0.50627, 0.51334, 0.55254, 0.81595},
2009 {0.51365, 0.51540, 0.52101, 0.53193, 0.55305, 0.62463,
2010 0.59617, 0.58328, 0.59035, 0.62965, 0.89303},
2011 {0.59064, 0.59240, 0.59801, 0.60893, 0.63009, 0.70169,
2012 0.67317, 0.66028, 0.66735, 0.70666, 0.96995},
2013 {0.66765, 0.66939, 0.67501, 0.68592, 0.70724, 0.77863,
2014 0.75016, 0.73728, 0.74435, 0.78366, 1.04696},
2015 {0.74464, 0.74636, 0.75200, 0.76293, 0.78405, 0.85561,
2016 0.82716, 0.81427, 0.82133, 0.86064, 1.12396},
2017 {0.82165, 0.82340, 0.82902, 0.83991, 0.86104, 0.93266,
2018 0.90414, 0.89128, 0.89834, 0.93763, 1.20100},
2019 {0.89863, 0.90042, 0.90659, 0.91705, 0.93805, 1.00960,
2020 0.98115, 0.96825, 0.97533, 1.01462, 1.27801},
2021 {0.97563, 0.97740, 0.98310, 0.99391, 1.01504, 1.08659,
2022 1.05814, 1.04526, 1.05233, 1.09163, 1.35503},
2023 {1.05276, 1.05451, 1.06002, 1.07090, 1.09099, 1.16357,
2024 1.13516, 1.12225, 1.12933, 1.16863, 1.43195},
2025 {1.12977, 1.13138, 1.13700, 1.14792, 1.16797, 1.24061,
2026 1.21212, 1.19926, 1.20626, 1.24554, 1.50900},
2027 {1.20664, 1.20839, 1.21400, 1.22490, 1.24606, 1.31772,
2028 1.28914, 1.27382, 1.28329, 1.32262, 1.58550},
2029 {1.28367, 1.28541, 1.29099, 1.30189, 1.32312, 1.39460,
2030 1.36612, 1.34924, 1.36030, 1.39961, 1.66310},
2031 {1.36064, 1.36249, 1.36799, 1.37896, 1.40004, 1.48030,
2032 1.44314, 1.43032, 1.43731, 1.47659, 1.73442},
2033 {1.43762, 1.43937, 1.44497, 1.45618, 1.47704, 1.54932,
2034 1.52012, 1.50725, 1.51430, 1.55357, 1.81708},
2035 {1.51462, 1.51937, 1.52203, 1.53316, 1.55403, 1.62572,
2036 1.59713, 1.58424, 1.59128, 1.63061, 1.89406},
2037 {1.59162, 1.59338, 1.59947, 1.60989, 1.63103, 1.70270,
2038 1.67411, 1.66124, 1.66799, 1.70759, 1.97103},
2039 {1.66874, 1.67037, 1.67597, 1.68687, 1.70814, 1.77969,
2040 1.75112, 1.73806, 1.74530, 1.78457, 2.04794},
2041 {1.74693, 1.74749, 1.75297, 1.76476, 1.78500, 1.85667,
2042 1.82811, 1.81504, 1.82101, 1.86161, 2.12492},
2043 {1.82260, 1.82437, 1.82995, 1.84174, 1.86202, 1.93372,
2044 1.90509, 1.89202, 1.89930, 1.93859, 2.20189},
2045 {1.89964, 1.90135, 1.90693, 1.91789, 1.93952, 2.01080,
2046 1.98207, 1.96921, 1.97628, 2.01384, 2.27887},
2047 {1.97662, 1.97917, 1.98611, 1.99487, 2.01601, 2.08778,
2048 2.05846, 2.04623, 2.05330, 2.09244, 2.35585},
2049 {2.05359, 2.05615, 2.06309, 2.07187, 2.09867, 2.16459,
2050 2.13610, 2.12322, 2.13029, 2.16942, 2.43199},
2051 {2.13063, 2.13233, 2.13795, 2.14886, 2.17008, 2.24199,
2052 2.21310, 2.20020, 2.20727, 2.24659, 2.50983},
2053 {2.20761, 2.20931, 2.21955, 2.22624, 2.24708, 2.32147,
2054 2.29009, 2.27725, 2.28276, 2.32359, 2.58680},
2055 {2.28459, 2.29108, 2.29202, 2.30286, 2.32007, 2.39559,
2056 2.36683, 2.35422, 2.36119, 2.40058, 2.66081},
2057 {2.36153, 2.36806, 2.36889, 2.37985, 2.40092, 2.47828,
2058 2.44381, 2.43099, 2.43819, 2.47750, 2.73779}};
2059
2060 // Garfield simulation at UD = -1800V; vd = 1.450cm/microsec, <driftfield> = 623V/cm
2061 Float_t time1800[ktimebin][kZbin] =
2062 {{0.09166, 0.09199, 0.09300, 0.09470, 0.09709, 0.10026,
2063 0.10434, 0.10983, 0.11831, 0.13987, 0.37802},
2064 {0.06585, 0.06623, 0.06735, 0.06921, 0.07180, 0.07520,
2065 0.07941, 0.08507, 0.09376, 0.11604, 0.35624},
2066 {0.03945, 0.04004, 0.04169, 0.04432, 0.04776, 0.05187,
2067 0.05674, 0.06300, 0.07290, 0.09884, 0.34704},
2068 {0.01108, 0.01287, 0.01717, 0.02280, 0.02880, 0.03476,
2069 0.04095, 0.04909, 0.06419, 0.10589, 0.36843},
2070 {0.01115, 0.01287, 0.01720, 0.02276, 0.02862, 0.03448,
2071 0.04073, 0.04973, 0.06799, 0.11535, 0.37224},
2072 {0.03918, 0.03975, 0.04134, 0.04382, 0.04707, 0.05105,
2073 0.05603, 0.06296, 0.07605, 0.10822, 0.36560},
2074 {0.06498, 0.06532, 0.06635, 0.06809, 0.07058, 0.07395,
2075 0.07855, 0.08495, 0.09632, 0.12488, 0.37730},
2076 {0.09130, 0.09160, 0.09199, 0.09300, 0.09472, 0.00000,
2077 0.11059, 0.11747, 0.13146, 0.16462, 0.42233},
2078 {0.13364, 0.13449, 0.13767, 0.14481, 0.16147, 0.23635,
2079 0.19706, 0.18812, 0.19704, 0.23520, 0.49749},
2080 {0.19698, 0.19844, 0.20311, 0.21236, 0.23082, 0.29920,
2081 0.26936, 0.25927, 0.26732, 0.30601, 0.56871},
2082 {0.26518, 0.26670, 0.27160, 0.28099, 0.29955, 0.36597,
2083 0.33885, 0.32858, 0.33653, 0.37524, 0.63801},
2084 {0.33441, 0.33553, 0.34040, 0.34987, 0.36841, 0.43428,
2085 0.40797, 0.39763, 0.40556, 0.44425, 0.70698},
2086 {0.40296, 0.40447, 0.40934, 0.41881, 0.43737, 0.50306,
2087 0.47695, 0.46662, 0.47455, 0.51329, 0.77600},
2088 {0.47296, 0.47344, 0.47830, 0.48779, 0.50632, 0.57200,
2089 0.54593, 0.53559, 0.54351, 0.58222, 0.84489},
2090 {0.54089, 0.54264, 0.54727, 0.55673, 0.57529, 0.64094,
2091 0.61490, 0.60457, 0.61249, 0.65118, 0.91394},
2092 {0.60987, 0.61138, 0.61624, 0.62573, 0.64428, 0.70989,
2093 0.68397, 0.67354, 0.68147, 0.72015, 0.98291},
2094 {0.67883, 0.68035, 0.68521, 0.69469, 0.71324, 0.77896,
2095 0.75287, 0.74251, 0.75043, 0.78912, 1.04458},
2096 {0.74780, 0.74932, 0.75421, 0.76367, 0.78221, 0.84785,
2097 0.82185, 0.81148, 0.81941, 0.85811, 1.12085},
2098 {0.81690, 0.81830, 0.82316, 0.83263, 0.85120, 0.91683,
2099 0.89077, 0.88045, 0.88837, 0.92707, 1.18976},
2100 {0.88574, 0.88726, 0.89228, 0.90198, 0.92017, 0.98578,
2101 0.95974, 0.94947, 0.95734, 0.99604, 1.25873},
2102 {0.95493, 0.95624, 0.96110, 0.97058, 0.98913, 1.05481,
2103 1.02873, 1.01839, 1.02631, 1.06503, 1.32772},
2104 {1.02392, 1.02524, 1.03008, 1.03955, 1.05810, 1.12378,
2105 1.09757, 1.08605, 1.09530, 1.13399, 1.39669},
2106 {1.09270, 1.09418, 1.09911, 1.10854, 1.12714, 1.19281,
2107 1.16502, 1.15633, 1.16427, 1.20271, 1.46574},
2108 {1.16168, 1.16323, 1.16801, 1.17772, 1.19604, 1.26190,
2109 1.23399, 1.22531, 1.23323, 1.27194, 1.53475},
2110 {1.23061, 1.23214, 1.23698, 1.24669, 1.26503, 1.33073,
2111 1.30461, 1.29428, 1.30220, 1.34091, 1.60372},
2112 {1.29960, 1.30110, 1.30596, 1.31544, 1.33398, 1.39962,
2113 1.37228, 1.36323, 1.37121, 1.40988, 1.67273},
2114 {1.36851, 1.37007, 1.37512, 1.38441, 1.40297, 1.46865,
2115 1.44256, 1.43222, 1.44017, 1.47878, 1.74155},
2116 {1.43752, 1.43904, 1.44773, 1.45338, 1.47220, 1.53759,
2117 1.51136, 1.50119, 1.50914, 1.54775, 1.81050},
2118 {1.50646, 1.50802, 1.51288, 1.52237, 1.54097, 1.60697,
2119 1.58049, 1.57018, 1.57811, 1.61678, 1.87947},
2120 {1.57545, 1.57720, 1.58185, 1.59134, 1.60996, 1.67787,
2121 1.64929, 1.63914, 1.64707, 1.68570, 1.94851},
2122 {1.64442, 1.64617, 1.65081, 1.66035, 1.67893, 1.74684,
2123 1.71826, 1.70745, 1.71604, 1.75310, 2.01748},
2124 {1.71337, 1.71513, 1.71978, 1.72932, 1.74645, 1.81346,
2125 1.78739, 1.77642, 1.78501, 1.82151, 2.08644},
2126 {1.78238, 1.78410, 1.78876, 1.79824, 1.81678, 1.88332,
2127 1.85639, 1.84262, 1.85397, 1.89270, 2.15533},
2128 {1.85135, 1.85306, 1.85778, 1.86728, 1.88580, 1.95615,
2129 1.92536, 1.91171, 1.92283, 1.96165, 2.22428},
2130 {1.92774, 1.92184, 1.92672, 1.93618, 1.95477, 2.02048,
2131 1.99427, 1.98068, 1.99192, 2.03062, 2.29338},
2132 {1.98929, 1.99081, 1.99567, 2.00515, 2.02373, 2.08987,
2133 2.06332, 2.05249, 2.05939, 2.09928, 2.36227},
2134 {2.05829, 2.05978, 2.06464, 2.07414, 2.09272, 2.15850,
2135 2.12928, 2.12194, 2.12987, 2.16825, 2.43083},
2136 {2.12726, 2.12869, 2.13360, 2.14425, 2.16160, 2.22872,
2137 2.20118, 2.19078, 2.19876, 2.23416, 2.50007}};
2138
2139 // Garfield simulation at UD = -1900V; vd = 1.610cm/microsec, <driftfield> = 655V/cm
2140 Float_t time1900[ktimebin][kZbin] =
2141 {{0.09166, 0.09198, 0.09298, 0.09467, 0.09707, 0.10023,
2142 0.10431, 0.10980, 0.11828, 0.13988, 0.37789},
2143 {0.06584, 0.06622, 0.06735, 0.06920, 0.07179, 0.07514,
2144 0.07938, 0.08505, 0.09374, 0.11606, 0.35599},
2145 {0.03945, 0.04002, 0.04169, 0.04432, 0.04775, 0.05185,
2146 0.05672, 0.06298, 0.07290, 0.09888, 0.34695},
2147 {0.01109, 0.01281, 0.01717, 0.02279, 0.02878, 0.03476,
2148 0.04094, 0.04909, 0.06421, 0.10597, 0.36823},
2149 {0.01115, 0.01287, 0.01720, 0.02294, 0.02862, 0.03448,
2150 0.04074, 0.04973, 0.06783, 0.11506, 0.37206},
2151 {0.03940, 0.03975, 0.04135, 0.04386, 0.04708, 0.05106,
2152 0.05604, 0.06293, 0.07592, 0.10787, 0.36484},
2153 {0.06500, 0.06534, 0.06638, 0.06811, 0.07060, 0.07413,
2154 0.07852, 0.08491, 0.09614, 0.12446, 0.37626},
2155 {0.09119, 0.09140, 0.09194, 0.09293, 0.09471, 0.00000,
2156 0.11013, 0.11685, 0.13050, 0.16302, 0.41991},
2157 {0.13111, 0.13190, 0.13466, 0.14091, 0.15554, 0.22409,
2158 0.18846, 0.18167, 0.19113, 0.22854, 0.48995},
2159 {0.18849, 0.18975, 0.19380, 0.20185, 0.21797, 0.28050,
2160 0.25368, 0.24575, 0.25446, 0.29249, 0.55442},
2161 {0.24995, 0.25125, 0.25563, 0.26366, 0.27986, 0.34065,
2162 0.31605, 0.30815, 0.31680, 0.35482, 0.61697},
2163 {0.31187, 0.31324, 0.31745, 0.32580, 0.34205, 0.40217,
2164 0.37825, 0.37031, 0.37897, 0.41696, 0.67890},
2165 {0.37401, 0.37531, 0.37955, 0.38777, 0.40395, 0.46408,
2166 0.44037, 0.43242, 0.44108, 0.47906, 0.74122},
2167 {0.43610, 0.43741, 0.44161, 0.44986, 0.46604, 0.52614,
2168 0.50248, 0.49452, 0.50316, 0.54116, 0.80326},
2169 {0.49820, 0.49988, 0.50372, 0.51196, 0.52814, 0.58822,
2170 0.56459, 0.55661, 0.56527, 0.60326, 0.86526},
2171 {0.56032, 0.56161, 0.56582, 0.57408, 0.59024, 0.65032,
2172 0.62670, 0.61872, 0.62737, 0.66537, 0.92749},
2173 {0.62240, 0.62371, 0.62792, 0.63624, 0.65236, 0.71241,
2174 0.68881, 0.68081, 0.68947, 0.72750, 0.98941},
2175 {0.68449, 0.68581, 0.69002, 0.69828, 0.71444, 0.77452,
2176 0.75089, 0.74295, 0.75157, 0.78957, 1.05157},
2177 {0.74660, 0.74790, 0.75212, 0.76036, 0.77654, 0.83748,
2178 0.81299, 0.80501, 0.81193, 0.85168, 1.11375},
2179 {0.80870, 0.81017, 0.81423, 0.82246, 0.83867, 0.89908,
2180 0.87509, 0.86660, 0.87577, 0.91376, 1.17586},
2181 {0.87080, 0.87233, 0.87632, 0.88458, 0.90074, 0.96083,
2182 0.93718, 0.92922, 0.93787, 0.97588, 1.23794},
2183 {0.93291, 0.93422, 0.93844, 0.94667, 0.96293, 1.02295,
2184 0.99929, 0.99127, 0.99997, 1.03797, 1.29995},
2185 {0.99500, 0.99645, 1.00308, 1.00877, 1.02497, 1.08504,
2186 1.06140, 1.05343, 1.06203, 1.10006, 1.36216},
2187 {1.05712, 1.05926, 1.06262, 1.07092, 1.08706, 1.14754,
2188 1.12350, 1.11550, 1.12417, 1.16218, 1.42427},
2189 {1.11921, 1.12059, 1.12473, 1.13297, 1.14916, 1.21140,
2190 1.18560, 1.17284, 1.18625, 1.22414, 1.48629},
2191 {1.18140, 1.18262, 1.18690, 1.19508, 1.21125, 1.27139,
2192 1.24164, 1.23495, 1.24838, 1.28634, 1.54852},
2193 {1.24340, 1.24473, 1.24901, 1.25732, 1.27336, 1.33358,
2194 1.30793, 1.30179, 1.31047, 1.34848, 1.61066},
2195 {1.30551, 1.30684, 1.31104, 1.32056, 1.33553, 1.39609,
2196 1.37004, 1.36392, 1.37045, 1.41057, 1.67259},
2197 {1.36755, 1.36892, 1.37315, 1.39148, 1.39755, 1.45820,
2198 1.43215, 1.42602, 1.43467, 1.47268, 1.73477},
2199 {1.42966, 1.43101, 1.43549, 1.45359, 1.45976, 1.52031,
2200 1.49601, 1.48811, 1.49677, 1.53477, 1.79691},
2201 {1.49180, 1.49321, 1.49760, 1.51570, 1.52175, 1.58185,
2202 1.55771, 1.55023, 1.55888, 1.59672, 1.85501},
2203 {1.55391, 1.55527, 1.55943, 1.57782, 1.58391, 1.64395,
2204 1.62008, 1.61233, 1.62085, 1.65883, 1.92091},
2205 {1.61599, 1.61732, 1.62154, 1.63993, 1.64612, 1.70608,
2206 1.68237, 1.67108, 1.68301, 1.72110, 1.97931},
2207 {1.67808, 1.67948, 1.68364, 1.70204, 1.70823, 1.76858,
2208 1.74404, 1.73539, 1.74512, 1.78321, 2.04522},
2209 {1.74019, 1.74152, 1.74573, 1.76415, 1.77015, 1.83040,
2210 1.80615, 1.79366, 1.80723, 1.84509, 2.10742},
2211 {1.80235, 1.80362, 1.80783, 1.82626, 1.83227, 1.89246,
2212 1.86795, 1.85405, 1.86938, 1.90720, 2.16953},
2213 {1.86442, 1.86572, 1.86994, 1.88837, 1.89438, 1.95445,
2214 1.93006, 1.92283, 1.93148, 1.96931, 2.23147},
2215 {1.92700, 1.92783, 1.93197, 1.95049, 1.95649, 2.01668,
2216 1.99217, 1.98486, 1.99352, 2.03143, 2.29358}};
2217
2218 // Garfield simulation at UD = -2000V; vd = 1.783cm/microsec, <driftfield> = 688V/cm
2219 Float_t time2000[ktimebin][kZbin] =
2220 {{0.09176, 0.09196, 0.09296, 0.09465, 0.09704, 0.10020,
2221 0.10427, 0.10977, 0.11825, 0.13988, 0.37774},
2222 {0.06583, 0.06620, 0.06735, 0.06918, 0.07177, 0.07513,
2223 0.07936, 0.08503, 0.09372, 0.11606, 0.35586},
2224 {0.03944, 0.04001, 0.04170, 0.04431, 0.04774, 0.05184,
2225 0.05670, 0.06296, 0.07291, 0.09893, 0.34680},
2226 {0.01108, 0.01281, 0.01719, 0.02279, 0.02879, 0.03474,
2227 0.04093, 0.04908, 0.06422, 0.10605, 0.36800},
2228 {0.01114, 0.01287, 0.01720, 0.02276, 0.02863, 0.03449,
2229 0.04073, 0.04970, 0.06774, 0.11478, 0.37179},
2230 {0.03925, 0.03977, 0.04135, 0.04386, 0.04711, 0.05108,
2231 0.05604, 0.06290, 0.07580, 0.10748, 0.36386},
2232 {0.06501, 0.06536, 0.06640, 0.06814, 0.07062, 0.07398,
2233 0.07852, 0.08487, 0.09598, 0.12405, 0.37519},
2234 {0.09109, 0.09127, 0.09188, 0.09292, 0.09472, 0.00000,
2235 0.10964, 0.11630, 0.12960, 0.16150, 0.41765},
2236 {0.12898, 0.12968, 0.13209, 0.13749, 0.15034, 0.21286,
2237 0.18088, 0.17590, 0.18591, 0.22254, 0.48315},
2238 {0.18122, 0.18227, 0.18574, 0.19263, 0.20674, 0.26376,
2239 0.23960, 0.23375, 0.24316, 0.28047, 0.54179},
2240 {0.23674, 0.23784, 0.24142, 0.24847, 0.26264, 0.31810,
2241 0.29602, 0.29008, 0.29944, 0.33675, 0.59795},
2242 {0.29279, 0.29382, 0.29742, 0.30448, 0.31865, 0.37364,
2243 0.35215, 0.34629, 0.35555, 0.39286, 0.65411},
2244 {0.34875, 0.34987, 0.35346, 0.36054, 0.37472, 0.42956,
2245 0.40825, 0.40229, 0.41167, 0.44894, 0.71033},
2246 {0.40484, 0.40594, 0.40954, 0.41660, 0.43077, 0.48560,
2247 0.46433, 0.45840, 0.46772, 0.50500, 0.76632},
2248 {0.46090, 0.46201, 0.46560, 0.47267, 0.48684, 0.54167,
2249 0.52041, 0.51449, 0.52382, 0.56108, 0.82227},
2250 {0.51698, 0.51809, 0.52173, 0.52874, 0.54291, 0.59776,
2251 0.57646, 0.57052, 0.57986, 0.61717, 0.87836},
2252 {0.57306, 0.57418, 0.57782, 0.58513, 0.59899, 0.65380,
2253 0.63255, 0.62661, 0.63594, 0.67325, 0.93460},
2254 {0.62912, 0.63024, 0.63383, 0.64103, 0.65506, 0.70988,
2255 0.68484, 0.68267, 0.69202, 0.72878, 0.99046},
2256 {0.68521, 0.68633, 0.68990, 0.69699, 0.71115, 0.76595,
2257 0.74468, 0.73872, 0.74814, 0.78538, 1.04674},
2258 {0.74127, 0.74239, 0.74605, 0.75303, 0.77022, 0.82204,
2259 0.80078, 0.79484, 0.80416, 0.84147, 1.10261},
2260 {0.79736, 0.79846, 0.80206, 0.80947, 0.82330, 0.87813,
2261 0.85688, 0.85087, 0.86023, 0.89752, 1.15874},
2262 {0.85342, 0.85454, 0.85815, 0.86519, 0.87936, 0.93417,
2263 0.91293, 0.90428, 0.91631, 0.95360, 1.20760},
2264 {0.90949, 0.91061, 0.91423, 0.92128, 0.93544, 0.99026,
2265 0.96807, 0.96305, 0.97239, 1.00967, 1.27078},
2266 {0.96556, 0.96669, 0.97111, 0.97734, 0.99151, 1.04664,
2267 1.02508, 1.01879, 1.02846, 1.06167, 1.32695},
2268 {1.02167, 1.02279, 1.02656, 1.03341, 1.04759, 1.10242,
2269 1.08115, 1.07003, 1.08453, 1.12184, 1.38304},
2270 {1.07776, 1.07883, 1.08242, 1.08950, 1.10384, 1.16422,
2271 1.13725, 1.13133, 1.14061, 1.17793, 1.43910},
2272 {1.13379, 1.13492, 1.13864, 1.14567, 1.15973, 1.21455,
2273 1.19323, 1.18734, 1.19668, 1.23401, 1.49528},
2274 {1.18988, 1.19098, 1.19457, 1.20164, 1.21582, 1.27064,
2275 1.24937, 1.24044, 1.25275, 1.29004, 1.55137},
2276 {1.24592, 1.24706, 1.25087, 1.25773, 1.27188, 1.32670,
2277 1.30544, 1.29953, 1.30883, 1.34613, 1.60743},
2278 {1.30202, 1.30313, 1.30673, 1.31381, 1.32797, 1.38278,
2279 1.36151, 1.35167, 1.36490, 1.40221, 1.66306},
2280 {1.35809, 1.35921, 1.36282, 1.36986, 1.38403, 1.43888,
2281 1.41760, 1.41174, 1.42083, 1.45830, 1.71915},
2282 {1.41419, 1.41528, 1.41890, 1.42595, 1.44011, 1.49496,
2283 1.47368, 1.46769, 1.47706, 1.51436, 1.77523},
2284 {1.47131, 1.47141, 1.47494, 1.48850, 1.49620, 1.55137,
2285 1.52977, 1.51820, 1.53315, 1.57042, 1.83158},
2286 {1.52635, 1.52750, 1.53103, 1.53814, 1.55228, 1.60736,
2287 1.58503, 1.57986, 1.58920, 1.62649, 1.88767},
2288 {1.58418, 1.58355, 1.58711, 1.59526, 1.60833, 1.66316,
2289 1.63345, 1.63261, 1.64556, 1.68204, 1.94359},
2290 {1.64027, 1.63958, 1.64489, 1.65024, 1.66443, 1.71925,
2291 1.69794, 1.69201, 1.70143, 1.73865, 1.99968},
2292 {1.69450, 1.69566, 1.69940, 1.70697, 1.71841, 1.77819,
2293 1.75396, 1.74814, 1.75743, 1.79083, 2.05427},
2294 {1.75054, 1.75221, 1.75527, 1.76306, 1.77662, 1.83428,
2295 1.81006, 1.81173, 1.81345, 1.85076, 2.10289}};
2296
2297 // Garfield simulation at UD = -2100V; vd = 1.959cm/microsec, <driftfield> = 720V/cm
2298 Float_t time2100[ktimebin][kZbin] =
2299 {{0.09160, 0.09194, 0.09294, 0.09462, 0.09701, 0.10017,
2300 0.10424, 0.10974, 0.11823, 0.13988, 0.37762},
2301 {0.06585, 0.06619, 0.06731, 0.06916, 0.07174, 0.07509,
2302 0.07933, 0.08500, 0.09370, 0.11609, 0.35565},
2303 {0.03960, 0.04001, 0.04171, 0.04430, 0.04774, 0.05182,
2304 0.05668, 0.06294, 0.07291, 0.09896, 0.34676},
2305 {0.01109, 0.01280, 0.01716, 0.02279, 0.02876, 0.03474,
2306 0.04096, 0.04908, 0.06424, 0.10612, 0.36790},
2307 {0.01114, 0.01285, 0.01719, 0.02287, 0.02863, 0.03449,
2308 0.04073, 0.04964, 0.06759, 0.11446, 0.37162},
2309 {0.03922, 0.03977, 0.04146, 0.04386, 0.04711, 0.05109,
2310 0.05605, 0.06287, 0.07575, 0.10713, 0.36298},
2311 {0.06504, 0.06538, 0.06641, 0.06818, 0.07064, 0.07426,
2312 0.07852, 0.08483, 0.09581, 0.12363, 0.37424},
2313 {0.09103, 0.09129, 0.09186, 0.09291, 0.09476, 0.00000,
2314 0.10923, 0.11578, 0.12873, 0.16005, 0.41525},
2315 {0.12723, 0.12777, 0.12988, 0.13458, 0.14579, 0.20264,
2316 0.17421, 0.17078, 0.18132, 0.21708, 0.47699},
2317 {0.17508, 0.17601, 0.17897, 0.18487, 0.19698, 0.24881,
2318 0.22737, 0.22337, 0.23348, 0.27000, 0.53032},
2319 {0.22571, 0.22663, 0.22969, 0.23570, 0.24787, 0.29826,
2320 0.27871, 0.27462, 0.28471, 0.32122, 0.58166},
2321 {0.27664, 0.27759, 0.28067, 0.28669, 0.29891, 0.34898,
2322 0.32982, 0.32570, 0.33576, 0.37229, 0.63268},
2323 {0.32766, 0.32862, 0.33170, 0.33778, 0.34988, 0.39973,
2324 0.38088, 0.37675, 0.38680, 0.42333, 0.68159},
2325 {0.37872, 0.37966, 0.38275, 0.38875, 0.40093, 0.45073,
2326 0.43192, 0.42780, 0.43786, 0.47438, 0.73480},
2327 {0.42974, 0.43070, 0.43378, 0.43982, 0.45196, 0.50177,
2328 0.48297, 0.47884, 0.48889, 0.52544, 0.78581},
2329 {0.48081, 0.48175, 0.48482, 0.49084, 0.50302, 0.55290,
2330 0.53398, 0.52988, 0.53994, 0.57647, 0.83687},
2331 {0.53645, 0.53295, 0.53586, 0.54188, 0.55408, 0.60398,
2332 0.58504, 0.58092, 0.59100, 0.62768, 0.88773},
2333 {0.58345, 0.58409, 0.58690, 0.59292, 0.60510, 0.65562,
2334 0.63609, 0.63197, 0.64203, 0.67856, 0.93907},
2335 {0.63397, 0.63490, 0.63795, 0.64403, 0.65613, 0.70612,
2336 0.68714, 0.68301, 0.69294, 0.72955, 0.99000},
2337 {0.68496, 0.68592, 0.68899, 0.69504, 0.70733, 0.75708,
2338 0.73818, 0.73405, 0.74412, 0.78064, 1.04100},
2339 {0.73600, 0.73696, 0.74003, 0.74624, 0.75828, 0.80805,
2340 0.78904, 0.78512, 0.79517, 0.83152, 1.09205},
2341 {0.78709, 0.78801, 0.79108, 0.79709, 0.80931, 0.85906,
2342 0.84027, 0.83614, 0.84621, 0.88269, 1.14058},
2343 {0.83808, 0.83905, 0.84215, 0.84816, 0.86031, 0.91011,
2344 0.89139, 0.88718, 0.89725, 0.93377, 1.19413},
2345 {0.88916, 0.89010, 0.89320, 0.89920, 0.91136, 0.96117,
2346 0.94235, 0.93822, 0.94828, 0.98480, 1.24538},
2347 {0.94036, 0.94113, 0.94422, 0.95023, 0.96241, 1.01220,
2348 0.99310, 0.98927, 0.99933, 1.03585, 1.29629},
2349 {0.99139, 0.99220, 0.99525, 1.00127, 1.01344, 1.06324,
2350 1.04451, 1.04033, 1.04836, 1.08690, 1.34727},
2351 {1.04261, 1.04325, 1.04628, 1.05232, 1.06448, 1.12090,
2352 1.09546, 1.09136, 1.10142, 1.13795, 1.39831},
2353 {1.09331, 1.09429, 1.09742, 1.10336, 1.11557, 1.16547,
2354 1.14658, 1.13642, 1.15247, 1.18898, 1.44936},
2355 {1.14436, 1.14539, 1.14847, 1.15443, 1.16662, 1.21794,
2356 1.19763, 1.19329, 1.20349, 1.23956, 1.50043},
2357 {1.19533, 1.19651, 1.19943, 1.20548, 1.21666, 1.26753,
2358 1.24862, 1.24434, 1.25455, 1.29106, 1.55142},
2359 {1.24638, 1.24756, 1.25046, 1.25648, 1.26764, 1.31858,
2360 1.29967, 1.29538, 1.30499, 1.34211, 1.60250},
2361 {1.29747, 1.29847, 1.30175, 1.30753, 1.31869, 1.36969,
2362 1.35069, 1.34656, 1.35663, 1.39316, 1.64644},
2363 {1.35537, 1.34952, 1.35255, 1.35869, 1.36973, 1.41387,
2364 1.40173, 1.39761, 1.40768, 1.44396, 1.70238},
2365 {1.39956, 1.40056, 1.40380, 1.40961, 1.42178, 1.46492,
2366 1.45278, 1.45423, 1.45872, 1.49522, 1.75557},
2367 {1.45080, 1.45159, 1.45463, 1.46109, 1.47287, 1.52263,
2368 1.50382, 1.50050, 1.50977, 1.54502, 1.80670},
2369 {1.50165, 1.50264, 1.50570, 1.51214, 1.52233, 1.57370,
2370 1.55484, 1.55155, 1.56080, 1.59731, 1.85778},
2371 {1.55269, 1.55364, 1.55675, 1.56274, 1.57491, 1.62598,
2372 1.60590, 1.60259, 1.61185, 1.64836, 1.90883},
2373 {1.60368, 1.60469, 1.60779, 1.61373, 1.62596, 1.67738,
2374 1.65651, 1.65249, 1.66290, 1.69936, 1.95959}};
2375
2376 // Garfield simulation at UD = -2200V; vd = 2.134cm/microsec, <driftfield> = 753V/cm
2377 Float_t time2200[ktimebin][kZbin] =
2378 {{0.09162, 0.09194, 0.09292, 0.09460, 0.09702, 0.10014,
2379 0.10421, 0.10971, 0.11820, 0.13990, 0.37745},
2380 {0.06581, 0.06618, 0.06730, 0.06915, 0.07173, 0.07507,
2381 0.07931, 0.08497, 0.09368, 0.11609, 0.35560},
2382 {0.03947, 0.04001, 0.04167, 0.04429, 0.04772, 0.05183,
2383 0.05667, 0.06293, 0.07292, 0.09900, 0.34673},
2384 {0.01111, 0.01280, 0.01716, 0.02279, 0.02876, 0.03473,
2385 0.04091, 0.04907, 0.06426, 0.10620, 0.36766},
2386 {0.01113, 0.01285, 0.01719, 0.02276, 0.02863, 0.03452,
2387 0.04076, 0.04960, 0.06745, 0.11419, 0.37139},
2388 {0.03923, 0.03978, 0.04137, 0.04387, 0.04713, 0.05110,
2389 0.05605, 0.06284, 0.07551, 0.10677, 0.36210},
2390 {0.06505, 0.06540, 0.06644, 0.06820, 0.07069, 0.07401,
2391 0.07852, 0.08479, 0.09565, 0.12325, 0.37313},
2392 {0.09107, 0.09127, 0.09181, 0.09291, 0.09474, 0.00000,
2393 0.10883, 0.11528, 0.12789, 0.15865, 0.41313},
2394 {0.12559, 0.12622, 0.12800, 0.13206, 0.14166, 0.19331,
2395 0.16832, 0.16632, 0.17724, 0.21218, 0.47098},
2396 {0.16992, 0.17070, 0.17325, 0.17831, 0.18871, 0.23557,
2397 0.21690, 0.21451, 0.22514, 0.26082, 0.52034},
2398 {0.21640, 0.21722, 0.21987, 0.22500, 0.23540, 0.28097,
2399 0.26399, 0.26154, 0.27214, 0.30784, 0.56734},
2400 {0.26318, 0.26400, 0.26679, 0.27181, 0.28220, 0.32739,
2401 0.31090, 0.30842, 0.31902, 0.35474, 0.61415},
2402 {0.31001, 0.31085, 0.31348, 0.31866, 0.32903, 0.37412,
2403 0.35777, 0.35546, 0.36588, 0.40159, 0.66103},
2404 {0.35687, 0.35769, 0.36033, 0.36556, 0.37588, 0.42094,
2405 0.40523, 0.40214, 0.41273, 0.44841, 0.70785},
2406 {0.40372, 0.40457, 0.40723, 0.41234, 0.42273, 0.46778,
2407 0.45148, 0.44903, 0.45961, 0.49526, 0.75486},
2408 {0.45062, 0.45139, 0.45404, 0.45966, 0.46958, 0.51470,
2409 0.49833, 0.49584, 0.50644, 0.54211, 0.80160},
2410 {0.49742, 0.49825, 0.50088, 0.50605, 0.51644, 0.56148,
2411 0.54518, 0.54270, 0.55330, 0.58897, 0.84854},
2412 {0.54427, 0.54510, 0.54774, 0.55290, 0.56329, 0.60846,
2413 0.59203, 0.58955, 0.60014, 0.63578, 0.89528},
2414 {0.59119, 0.59199, 0.59471, 0.59975, 0.61014, 0.65533,
2415 0.63889, 0.63636, 0.64699, 0.68269, 0.94197},
2416 {0.63866, 0.63880, 0.64145, 0.64664, 0.65701, 0.70639,
2417 0.68574, 0.68325, 0.69385, 0.72949, 0.98900},
2418 {0.68483, 0.68566, 0.68831, 0.69347, 0.70386, 0.74890,
2419 0.73260, 0.73010, 0.74069, 0.77638, 1.03320},
2420 {0.73168, 0.73255, 0.73515, 0.74031, 0.75072, 0.79576,
2421 0.77117, 0.77501, 0.78755, 0.82318, 1.08006},
2422 {0.77854, 0.78310, 0.78200, 0.79525, 0.79756, 0.84281,
2423 0.81803, 0.82393, 0.83441, 0.87008, 1.12692},
2424 {0.82541, 0.82642, 0.82916, 0.83528, 0.84442, 0.89086,
2425 0.87315, 0.87079, 0.88125, 0.91694, 1.17648},
2426 {0.87226, 0.87308, 0.87602, 0.88086, 0.89128, 0.93772,
2427 0.92001, 0.91751, 0.92811, 0.95587, 1.22328},
2428 {0.91921, 0.91994, 0.92256, 0.92772, 0.94713, 0.98566,
2429 0.96690, 0.96436, 0.97495, 1.01064, 1.26882},
2430 {0.96790, 0.96679, 0.96941, 0.97463, 0.99399, 1.03001,
2431 1.01376, 1.01112, 1.02181, 1.05749, 1.31568},
2432 {1.01278, 1.01390, 1.01674, 1.02147, 1.03182, 1.07820,
2433 1.06056, 1.05798, 1.06867, 1.10433, 1.36390},
2434 {1.05964, 1.06076, 1.06331, 1.06833, 1.07870, 1.13297,
2435 1.10742, 1.10520, 1.11543, 1.15120, 1.41069},
2436 {1.10664, 1.10762, 1.10997, 1.11519, 1.12556, 1.17531,
2437 1.15427, 1.14620, 1.16229, 1.19805, 1.45758},
2438 {1.15352, 1.15421, 1.15683, 1.16218, 1.17242, 1.21910,
2439 1.20035, 1.19863, 1.20579, 1.24473, 1.50412},
2440 {1.20019, 1.20115, 1.20369, 1.20892, 1.21928, 1.26913,
2441 1.24721, 1.24549, 1.25605, 1.29159, 1.54920},
2442 {1.24707, 1.24846, 1.25052, 1.25602, 1.26608, 1.31558,
2443 1.29448, 1.29232, 1.30293, 1.33675, 1.59798},
2444 {1.29391, 1.29475, 1.29738, 1.30255, 1.31294, 1.36244,
2445 1.34167, 1.33918, 1.34979, 1.38229, 1.64496},
2446 {1.34078, 1.34304, 1.34424, 1.35565, 1.35980, 1.40930,
2447 1.38853, 1.38229, 1.39664, 1.42863, 1.69162},
2448 {1.38762, 1.38847, 1.39110, 1.39627, 1.40666, 1.45183,
2449 1.43539, 1.43289, 1.44348, 1.47549, 1.73876},
2450 {1.43524, 1.43533, 1.43796, 1.44310, 1.45371, 1.49305,
2451 1.48224, 1.47941, 1.49034, 1.52601, 1.78552},
2452 {1.48122, 1.48219, 1.48482, 1.48991, 1.50030, 1.53991,
2453 1.52898, 1.52653, 1.53653, 1.57282, 1.82386}};
2454
4d18a639 2455 if (fTimeStruct1) {
2456 delete [] fTimeStruct1;
2457 }
2458 fTimeStruct1 = new Float_t[ktimebin*kZbin];
2459
2460 if (fTimeStruct2) {
2461 delete [] fTimeStruct2;
2462 }
2463 fTimeStruct2 = new Float_t[ktimebin*kZbin];
2464
2465 for (Int_t ctrt = 0; ctrt < ktimebin; ctrt++) {
2466 for (Int_t ctrz = 0; ctrz < kZbin; ctrz++) {
2467 if (vdrift > fVDsmp[6]) {
2468 fTimeStruct1[ctrt+ctrz*ktimebin] = time2100[ctrt][ctrz];
2469 fTimeStruct2[ctrt+ctrz*ktimebin] = time2200[ctrt][ctrz];
2470 fVDlo = fVDsmp[6];
2471 fVDhi = fVDsmp[7];
2472 }
2473 else if (vdrift > fVDsmp[5]) {
2474 fTimeStruct1[ctrt+ctrz*ktimebin] = time2000[ctrt][ctrz];
2475 fTimeStruct2[ctrt+ctrz*ktimebin] = time2100[ctrt][ctrz];
2476 fVDlo = fVDsmp[5];
2477 fVDhi = fVDsmp[6];
2478 }
2479 else if (vdrift > fVDsmp[4]) {
2480 fTimeStruct1[ctrt+ctrz*ktimebin] = time1900[ctrt][ctrz];
2481 fTimeStruct2[ctrt+ctrz*ktimebin] = time2000[ctrt][ctrz];
2482 fVDlo = fVDsmp[4];
2483 fVDhi = fVDsmp[5];
2484 }
2485 else if (vdrift > fVDsmp[3]) {
2486 fTimeStruct1[ctrt+ctrz*ktimebin] = time1800[ctrt][ctrz];
2487 fTimeStruct2[ctrt+ctrz*ktimebin] = time1900[ctrt][ctrz];
2488 fVDlo = fVDsmp[3];
2489 fVDhi = fVDsmp[4];
2490 }
2491 else if (vdrift > fVDsmp[2]) {
2492 fTimeStruct1[ctrt+ctrz*ktimebin] = time1700[ctrt][ctrz];
2493 fTimeStruct2[ctrt+ctrz*ktimebin] = time1800[ctrt][ctrz];
2494 fVDlo = fVDsmp[2];
2495 fVDhi = fVDsmp[3];
2496 }
2497 else if (vdrift > fVDsmp[1]) {
2498 fTimeStruct1[ctrt+ctrz*ktimebin] = time1600[ctrt][ctrz];
2499 fTimeStruct2[ctrt+ctrz*ktimebin] = time1700[ctrt][ctrz];
2500 fVDlo = fVDsmp[1];
2501 fVDhi = fVDsmp[2];
2502 }
2503 else if (vdrift > (fVDsmp[0] - 1.0e-5)) {
2504 fTimeStruct1[ctrt+ctrz*ktimebin] = time1500[ctrt][ctrz];
2505 fTimeStruct2[ctrt+ctrz*ktimebin] = time1600[ctrt][ctrz];
2506 fVDlo = fVDsmp[0];
2507 fVDhi = fVDsmp[1];
3551db50 2508 }
2509 }
2510 }
4d18a639 2511
3551db50 2512}
2513
2514//_____________________________________________________________________________
2515void AliTRDdigitizer::RecalcDiffusion(Float_t vdrift)
2516{
4d18a639 2517 //
2518 // Recalculates the diffusion parameters
2519 //
0dbeb81c 2520 // The B=0 case is not really included here.
2521 // Should be revisited!
2522 //
4d18a639 2523
2524 if (vdrift == fDiffLastVdrift) {
3551db50 2525 return;
4d18a639 2526 }
7754cd1f 2527
4d18a639 2528 AliTRDSimParam *simParam = AliTRDSimParam::Instance();
9afbd7de 2529 if (!simParam) {
7925de54 2530 AliError("Could not get simulation parameters");
3551db50 2531 return;
2532 }
2533
4d18a639 2534 AliTRDCommonParam *commonParam = AliTRDCommonParam::Instance();
9afbd7de 2535 if (!commonParam) {
7925de54 2536 AliError("Could not get common parameters");
3551db50 2537 return;
2538 }
2539
4d18a639 2540 AliTRDcalibDB *calibration = AliTRDcalibDB::Instance();
9afbd7de 2541 if (!calibration) {
7925de54 2542 AliError("Could not get calibration object");
3551db50 2543 return;
2544 }
2545
4e009ce4 2546 // The magnetic field strength
1b95a37b 2547 Double_t x[3] = { 0.0, 0.0, 0.0 };
2548 Double_t b[3];
4e009ce4 2549 gAlice->Field(x,b); // b[] is in kilo Gauss
1b95a37b 2550 Float_t field = b[2] * 0.1; // Tesla
1b95a37b 2551
4d18a639 2552 fDiffLastVdrift = vdrift;
3551db50 2553
9afbd7de 2554 // DiffusionL
4d18a639 2555 const Int_t kNbL = 5;
2556 Float_t p0L[kNbL] = { 0.007440, 0.007493, 0.007513, 0.007672, 0.007831 };
2557 Float_t p1L[kNbL] = { 0.019252, 0.018912, 0.018636, 0.018012, 0.017343 };
2558 Float_t p2L[kNbL] = { -0.005042, -0.004926, -0.004867, -0.004650, -0.004424 };
2559 Float_t p3L[kNbL] = { 0.000195, 0.000189, 0.000195, 0.000182, 0.000169 };
2560
2561 Int_t ibL = ((Int_t) (10 * (field - 0.15)));
2562 ibL = TMath::Max( 0,ibL);
2563 ibL = TMath::Min(kNbL,ibL);
2564
2565 fDiffusionL = p0L[ibL]
2566 + p1L[ibL] * vdrift
2567 + p2L[ibL] * vdrift*vdrift
2568 + p3L[ibL] * vdrift*vdrift*vdrift;
3551db50 2569
9afbd7de 2570 // DiffusionT
4d18a639 2571 const Int_t kNbT = 5;
2572 Float_t p0T[kNbT] = { 0.009550, 0.009599, 0.009674, 0.009757, 0.009850 };
2573 Float_t p1T[kNbT] = { 0.006667, 0.006539, 0.006359, 0.006153, 0.005925 };
2574 Float_t p2T[kNbT] = { -0.000853, -0.000798, -0.000721, -0.000635, -0.000541 };
2575 Float_t p3T[kNbT] = { 0.000131, 0.000122, 0.000111, 0.000098, 0.000085 };
2576
2577 Int_t ibT= ((Int_t) (10 * (field - 0.15)));
2578 ibT = TMath::Max( 0,ibT);
2579 ibT = TMath::Min(kNbT,ibT);
2580
2581 fDiffusionT = p0T[ibT]
2582 + p1T[ibT] * vdrift
2583 + p2T[ibT] * vdrift*vdrift
2584 + p3T[ibT] * vdrift*vdrift*vdrift;
3551db50 2585
9afbd7de 2586 // OmegaTau
4e009ce4 2587 fOmegaTau = calibration->GetOmegaTau(vdrift,field);
1b95a37b 2588
9afbd7de 2589 // Lorentzfactor
4d18a639 2590 if (commonParam->ExBOn()) {
2591 fLorentzFactor = 1.0 / (1.0 + fOmegaTau*fOmegaTau);
2592 }
2593 else {
2594 fLorentzFactor = 1.0;
3551db50 2595 }
9afbd7de 2596
3551db50 2597}
2598
2599//_____________________________________________________________________________
2600Float_t AliTRDdigitizer::GetDiffusionL(Float_t vdrift)
2601{
2602 //
2603 // Returns the longitudinal diffusion coefficient for a given drift
2604 // velocity <vd> and a B-field <b> for Xe/CO2 (15%).
2605 // The values are according to a GARFIELD simulation.
2606 //
2607
2608 RecalcDiffusion(vdrift);
4d18a639 2609
2610 return fDiffusionL;
9afbd7de 2611
3551db50 2612}
2613
2614//_____________________________________________________________________________
2615Float_t AliTRDdigitizer::GetDiffusionT(Float_t vdrift)
2616{
2617 //
2618 // Returns the transverse diffusion coefficient for a given drift
2619 // velocity <vd> and a B-field <b> for Xe/CO2 (15%).
2620 // The values are according to a GARFIELD simulation.
2621 //
2622
2623 RecalcDiffusion(vdrift);
4d18a639 2624
2625 return fDiffusionT;
9afbd7de 2626
3551db50 2627}
2628
2629//_____________________________________________________________________________
2630Int_t AliTRDdigitizer::Diffusion(Float_t vdrift, Double_t driftlength, Double_t *xyz)
2631{
2632 //
2633 // Applies the diffusion smearing to the position of a single electron
2634 //
2635
2636 RecalcDiffusion(vdrift);
2637
2638 Float_t driftSqrt = TMath::Sqrt(driftlength);
4d18a639 2639 Float_t sigmaT = driftSqrt * fDiffusionT;
2640 Float_t sigmaL = driftSqrt * fDiffusionL;
2641 xyz[0] = gRandom->Gaus(xyz[0],sigmaL * GetLorentzFactor(vdrift));
2642 xyz[1] = gRandom->Gaus(xyz[1],sigmaT * GetLorentzFactor(vdrift));
2643 xyz[2] = gRandom->Gaus(xyz[2],sigmaT);
3551db50 2644
2645 return 1;
9afbd7de 2646
3551db50 2647}
2648
2649//_____________________________________________________________________________
2650Float_t AliTRDdigitizer::GetLorentzFactor(Float_t vd)
2651{
9afbd7de 2652 //
2653 // Returns the recalculated Lorentz factor
2654 //
2655
3551db50 2656 RecalcDiffusion(vd);
4d18a639 2657
2658 return fLorentzFactor;
9afbd7de 2659
3551db50 2660}
2661
2662//_____________________________________________________________________________
2663Int_t AliTRDdigitizer::ExB(Float_t vdrift, Double_t driftlength, Double_t *xyz)
2664{
2665 //
2666 // Applies E x B effects to the position of a single electron
2667 //
2668
2669 RecalcDiffusion(vdrift);
2670
2671 xyz[0] = xyz[0];
4d18a639 2672 xyz[1] = xyz[1] + fOmegaTau * driftlength;
3551db50 2673 xyz[2] = xyz[2];
2674
2675 return 1;
9afbd7de 2676
3551db50 2677}