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4c039060 1/**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
3 * *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
6 * *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
15
16/*
17$Log$
b9de75e1 18Revision 1.33 2001/04/03 12:40:43 kowal2
19Removed printouts
20
5a28a08f 21Revision 1.32 2001/03/12 17:47:36 hristov
22Changes needed on Sun with CC 5.0
23
5cf7bbad 24Revision 1.31 2001/03/12 08:21:50 kowal2
25Corrected C++ bug in the material definitions
26
9a3667bd 27Revision 1.30 2001/03/01 17:34:47 kowal2
28Correction due to the accuracy problem
29
710dacf5 30Revision 1.29 2001/02/28 16:34:40 kowal2
31Protection against nonphysical values of the avalanche size,
3210**6 is the maximum
33
1705494b 34Revision 1.28 2001/01/26 19:57:19 hristov
35Major upgrade of AliRoot code
36
2ab0c725 37Revision 1.27 2001/01/13 17:29:33 kowal2
38Sun compiler correction
39
f2e8b846 40Revision 1.26 2001/01/10 07:59:43 kowal2
41Corrections to load points from the noncompressed hits.
42
53048f2e 43Revision 1.25 2000/11/02 07:25:31 kowal2
44Changes due to the new hit structure.
45Memory leak removed.
46
39c8eb58 47Revision 1.24 2000/10/05 16:06:09 kowal2
48Forward declarations. Changes due to a new class AliComplexCluster.
49
2b06d5c3 50Revision 1.23 2000/10/02 21:28:18 fca
51Removal of useless dependecies via forward declarations
52
94de3818 53Revision 1.22 2000/07/10 20:57:39 hristov
54Update of TPC code and macros by M.Kowalski
55
73042f01 56Revision 1.19.2.4 2000/06/26 07:39:42 kowal2
57Changes to obey the coding rules
58
59Revision 1.19.2.3 2000/06/25 08:38:41 kowal2
60Splitted from AliTPCtracking
61
62Revision 1.19.2.2 2000/06/16 12:59:28 kowal2
63Changed parameter settings
64
65Revision 1.19.2.1 2000/06/09 07:15:07 kowal2
66
67Defaults loaded automatically (hard-wired)
68Optional parameters can be set via macro called in the constructor
69
70Revision 1.19 2000/04/18 19:00:59 fca
71Small bug fixes to TPC files
72
4d68a14a 73Revision 1.18 2000/04/17 09:37:33 kowal2
74removed obsolete AliTPCDigitsDisplay.C
75
cc80f89e 76Revision 1.17.2.2 2000/04/10 08:15:12 kowal2
77
78New, experimental data structure from M. Ivanov
79New tracking algorithm
80Different pad geometry for different sectors
81Digitization rewritten
82
83Revision 1.17.2.1 2000/04/10 07:56:53 kowal2
84Not used anymore - removed
85
86Revision 1.17 2000/01/19 17:17:30 fca
87Introducing a list of lists of hits -- more hits allowed for detector now
88
1cedd08a 89Revision 1.16 1999/11/05 09:29:23 fca
90Accept only signals > 0
91
921bf71a 92Revision 1.15 1999/10/08 06:26:53 fca
93Removed ClustersIndex - not used anymore
94
e674b993 95Revision 1.14 1999/09/29 09:24:33 fca
96Introduction of the Copyright and cvs Log
97
4c039060 98*/
99
fe4da5cc 100///////////////////////////////////////////////////////////////////////////////
101// //
102// Time Projection Chamber //
103// This class contains the basic functions for the Time Projection Chamber //
104// detector. Functions specific to one particular geometry are //
105// contained in the derived classes //
106// //
107//Begin_Html
108/*
1439f98e 109<img src="picts/AliTPCClass.gif">
fe4da5cc 110*/
111//End_Html
112// //
8c555625 113// //
fe4da5cc 114///////////////////////////////////////////////////////////////////////////////
115
73042f01 116//
117
fe4da5cc 118#include <TMath.h>
119#include <TRandom.h>
120#include <TVector.h>
8c555625 121#include <TMatrix.h>
fe4da5cc 122#include <TGeometry.h>
123#include <TNode.h>
124#include <TTUBS.h>
125#include <TObjectTable.h>
1578254f 126#include "TParticle.h"
fe4da5cc 127#include "AliTPC.h"
73042f01 128#include <TFile.h>
fe4da5cc 129#include "AliRun.h"
130#include <iostream.h>
2ab0c725 131#include <stdlib.h>
fe4da5cc 132#include <fstream.h>
133#include "AliMC.h"
94de3818 134#include "AliMagF.h"
fe4da5cc 135
cc80f89e 136
73042f01 137#include "AliTPCParamSR.h"
8c555625 138#include "AliTPCPRF2D.h"
139#include "AliTPCRF1D.h"
cc80f89e 140#include "AliDigits.h"
141#include "AliSimDigits.h"
39c8eb58 142#include "AliTPCTrackHits.h"
143#include "AliPoints.h"
144#include "AliArrayBranch.h"
145
cc80f89e 146
147#include "AliTPCDigitsArray.h"
2b06d5c3 148#include "AliComplexCluster.h"
cc80f89e 149#include "AliClusters.h"
150#include "AliTPCClustersRow.h"
151#include "AliTPCClustersArray.h"
8c555625 152
73042f01 153#include "AliTPCcluster.h"
154#include "AliTPCclusterer.h"
155#include "AliTPCtracker.h"
8c555625 156
73042f01 157#include <TInterpreter.h>
2b06d5c3 158#include <TTree.h>
1283eee5 159
39c8eb58 160
161
fe4da5cc 162ClassImp(AliTPC)
163
164//_____________________________________________________________________________
165AliTPC::AliTPC()
166{
167 //
168 // Default constructor
169 //
170 fIshunt = 0;
fe4da5cc 171 fHits = 0;
172 fDigits = 0;
fe4da5cc 173 fNsectors = 0;
cc80f89e 174 //MI changes
175 fDigitsArray = 0;
176 fClustersArray = 0;
73042f01 177 fTPCParam=0;
39c8eb58 178 fTrackHits = 0;
179 fHitType = 2;
180 fTPCParam = 0;
fe4da5cc 181}
182
183//_____________________________________________________________________________
184AliTPC::AliTPC(const char *name, const char *title)
185 : AliDetector(name,title)
186{
187 //
188 // Standard constructor
189 //
190
191 //
192 // Initialise arrays of hits and digits
193 fHits = new TClonesArray("AliTPChit", 176);
4d68a14a 194 gAlice->AddHitList(fHits);
cc80f89e 195 //MI change
196 fDigitsArray = 0;
197 fClustersArray= 0;
fe4da5cc 198 //
39c8eb58 199 fTrackHits = new AliTPCTrackHits; //MI - 13.09.2000
200 fTrackHits->SetHitPrecision(0.002);
201 fTrackHits->SetStepPrecision(0.003);
202 fTrackHits->SetMaxDistance(100);
203
204 fHitType = 2;
205 //
fe4da5cc 206 // Initialise counters
cc80f89e 207 fNsectors = 0;
cc80f89e 208
fe4da5cc 209 //
210 fIshunt = 0;
211 //
212 // Initialise color attributes
213 SetMarkerColor(kYellow);
73042f01 214
215 //
216 // Set TPC parameters
217 //
218
219 if (!strcmp(title,"Default")) {
220 fTPCParam = new AliTPCParamSR;
221 } else {
222 cerr<<"AliTPC warning: in Config.C you must set non-default parameters\n";
223 fTPCParam=0;
224 }
225
fe4da5cc 226}
227
228//_____________________________________________________________________________
229AliTPC::~AliTPC()
230{
231 //
232 // TPC destructor
233 //
73042f01 234
fe4da5cc 235 fIshunt = 0;
236 delete fHits;
237 delete fDigits;
73042f01 238 delete fTPCParam;
39c8eb58 239 delete fTrackHits; //MI 15.09.2000
fe4da5cc 240}
241
fe4da5cc 242//_____________________________________________________________________________
243void AliTPC::AddHit(Int_t track, Int_t *vol, Float_t *hits)
244{
245 //
246 // Add a hit to the list
247 //
39c8eb58 248 // TClonesArray &lhits = *fHits;
249 // new(lhits[fNhits++]) AliTPChit(fIshunt,track,vol,hits);
250 if (fHitType&1){
251 TClonesArray &lhits = *fHits;
252 new(lhits[fNhits++]) AliTPChit(fIshunt,track,vol,hits);
253 }
254 if (fHitType&2)
255 AddHit2(track,vol,hits);
fe4da5cc 256}
257
fe4da5cc 258//_____________________________________________________________________________
259void AliTPC::BuildGeometry()
260{
cc80f89e 261
fe4da5cc 262 //
263 // Build TPC ROOT TNode geometry for the event display
264 //
73042f01 265 TNode *nNode, *nTop;
fe4da5cc 266 TTUBS *tubs;
267 Int_t i;
268 const int kColorTPC=19;
1283eee5 269 char name[5], title[25];
fe4da5cc 270 const Double_t kDegrad=TMath::Pi()/180;
1283eee5 271 const Double_t kRaddeg=180./TMath::Pi();
272
1283eee5 273
73042f01 274 Float_t innerOpenAngle = fTPCParam->GetInnerAngle();
275 Float_t outerOpenAngle = fTPCParam->GetOuterAngle();
1283eee5 276
73042f01 277 Float_t innerAngleShift = fTPCParam->GetInnerAngleShift();
278 Float_t outerAngleShift = fTPCParam->GetOuterAngleShift();
1283eee5 279
280 Int_t nLo = fTPCParam->GetNInnerSector()/2;
281 Int_t nHi = fTPCParam->GetNOuterSector()/2;
282
73042f01 283 const Double_t kloAng = (Double_t)TMath::Nint(innerOpenAngle*kRaddeg);
284 const Double_t khiAng = (Double_t)TMath::Nint(outerOpenAngle*kRaddeg);
285 const Double_t kloAngSh = (Double_t)TMath::Nint(innerAngleShift*kRaddeg);
286 const Double_t khiAngSh = (Double_t)TMath::Nint(outerAngleShift*kRaddeg);
1283eee5 287
288
73042f01 289 const Double_t kloCorr = 1/TMath::Cos(0.5*kloAng*kDegrad);
290 const Double_t khiCorr = 1/TMath::Cos(0.5*khiAng*kDegrad);
1283eee5 291
292 Double_t rl,ru;
293
294
fe4da5cc 295 //
296 // Get ALICE top node
fe4da5cc 297 //
1283eee5 298
73042f01 299 nTop=gAlice->GetGeometry()->GetNode("alice");
1283eee5 300
301 // inner sectors
302
cc80f89e 303 rl = fTPCParam->GetInnerRadiusLow();
304 ru = fTPCParam->GetInnerRadiusUp();
1283eee5 305
306
fe4da5cc 307 for(i=0;i<nLo;i++) {
308 sprintf(name,"LS%2.2d",i);
1283eee5 309 name[4]='\0';
310 sprintf(title,"TPC low sector %3d",i);
311 title[24]='\0';
312
73042f01 313 tubs = new TTUBS(name,title,"void",rl*kloCorr,ru*kloCorr,250.,
314 kloAng*(i-0.5)+kloAngSh,kloAng*(i+0.5)+kloAngSh);
fe4da5cc 315 tubs->SetNumberOfDivisions(1);
73042f01 316 nTop->cd();
317 nNode = new TNode(name,title,name,0,0,0,"");
318 nNode->SetLineColor(kColorTPC);
319 fNodes->Add(nNode);
fe4da5cc 320 }
1283eee5 321
fe4da5cc 322 // Outer sectors
1283eee5 323
cc80f89e 324 rl = fTPCParam->GetOuterRadiusLow();
325 ru = fTPCParam->GetOuterRadiusUp();
1283eee5 326
fe4da5cc 327 for(i=0;i<nHi;i++) {
328 sprintf(name,"US%2.2d",i);
1283eee5 329 name[4]='\0';
fe4da5cc 330 sprintf(title,"TPC upper sector %d",i);
1283eee5 331 title[24]='\0';
73042f01 332 tubs = new TTUBS(name,title,"void",rl*khiCorr,ru*khiCorr,250,
333 khiAng*(i-0.5)+khiAngSh,khiAng*(i+0.5)+khiAngSh);
fe4da5cc 334 tubs->SetNumberOfDivisions(1);
73042f01 335 nTop->cd();
336 nNode = new TNode(name,title,name,0,0,0,"");
337 nNode->SetLineColor(kColorTPC);
338 fNodes->Add(nNode);
fe4da5cc 339 }
cc80f89e 340
73042f01 341}
1283eee5 342
fe4da5cc 343//_____________________________________________________________________________
344Int_t AliTPC::DistancetoPrimitive(Int_t , Int_t )
345{
346 //
347 // Calculate distance from TPC to mouse on the display
348 // Dummy procedure
349 //
350 return 9999;
351}
352
73042f01 353void AliTPC::Clusters2Tracks(TFile *of) {
3c0f9266 354 //-----------------------------------------------------------------
355 // This is a track finder.
3c0f9266 356 //-----------------------------------------------------------------
b9de75e1 357 AliTPCtracker tracker(fTPCParam);
358 tracker.Clusters2Tracks(gFile,of);
fe4da5cc 359}
360
361//_____________________________________________________________________________
362void AliTPC::CreateMaterials()
363{
8c555625 364 //-----------------------------------------------
37831078 365 // Create Materials for for TPC simulations
8c555625 366 //-----------------------------------------------
367
368 //-----------------------------------------------------------------
369 // Origin: Marek Kowalski IFJ, Krakow, Marek.Kowalski@ifj.edu.pl
370 //-----------------------------------------------------------------
1283eee5 371
73042f01 372 Int_t iSXFLD=gAlice->Field()->Integ();
373 Float_t sXMGMX=gAlice->Field()->Max();
1283eee5 374
375 Float_t amat[5]; // atomic numbers
376 Float_t zmat[5]; // z
377 Float_t wmat[5]; // proportions
378
379 Float_t density;
37831078 380 Float_t apure[2];
1283eee5 381
1283eee5 382
37831078 383 //***************** Gases *************************
384
385 //-------------------------------------------------
1283eee5 386 // pure gases
37831078 387 //-------------------------------------------------
1283eee5 388
37831078 389 // Neon
1283eee5 390
391
37831078 392 amat[0]= 20.18;
393 zmat[0]= 10.;
1283eee5 394 density = 0.0009;
37831078 395
396 apure[0]=amat[0];
1283eee5 397
37831078 398 AliMaterial(20,"Ne",amat[0],zmat[0],density,999.,999.);
1283eee5 399
37831078 400 // Argon
1283eee5 401
37831078 402 amat[0]= 39.948;
403 zmat[0]= 18.;
404 density = 0.001782;
1283eee5 405
37831078 406 apure[1]=amat[0];
1283eee5 407
37831078 408 AliMaterial(21,"Ar",amat[0],zmat[0],density,999.,999.);
409
1283eee5 410
411 //--------------------------------------------------------------
412 // gases - compounds
413 //--------------------------------------------------------------
414
415 Float_t amol[3];
416
37831078 417 // CO2
1283eee5 418
419 amat[0]=12.011;
420 amat[1]=15.9994;
421
422 zmat[0]=6.;
423 zmat[1]=8.;
424
425 wmat[0]=1.;
426 wmat[1]=2.;
427
428 density=0.001977;
429
430 amol[0] = amat[0]*wmat[0]+amat[1]*wmat[1];
431
432 AliMixture(10,"CO2",amat,zmat,density,-2,wmat);
37831078 433
1283eee5 434 // CF4
435
436 amat[0]=12.011;
437 amat[1]=18.998;
438
439 zmat[0]=6.;
440 zmat[1]=9.;
441
442 wmat[0]=1.;
443 wmat[1]=4.;
444
445 density=0.003034;
446
447 amol[1] = amat[0]*wmat[0]+amat[1]*wmat[1];
448
449 AliMixture(11,"CF4",amat,zmat,density,-2,wmat);
450
37831078 451
1283eee5 452 // CH4
453
454 amat[0]=12.011;
455 amat[1]=1.;
456
457 zmat[0]=6.;
458 zmat[1]=1.;
459
460 wmat[0]=1.;
461 wmat[1]=4.;
462
463 density=0.000717;
464
465 amol[2] = amat[0]*wmat[0]+amat[1]*wmat[1];
466
467 AliMixture(12,"CH4",amat,zmat,density,-2,wmat);
468
469 //----------------------------------------------------------------
470 // gases - mixtures, ID >= 20 pure gases, <= 10 ID < 20 -compounds
471 //----------------------------------------------------------------
37831078 472
473 char namate[21];
1283eee5 474 density = 0.;
475 Float_t am=0;
476 Int_t nc;
37831078 477 Float_t rho,absl,X0,buf[1];
1283eee5 478 Int_t nbuf;
37831078 479 Float_t a,z;
1283eee5 480
481 for(nc = 0;nc<fNoComp;nc++)
482 {
483
484 // retrive material constants
485
37831078 486 gMC->Gfmate((*fIdmate)[fMixtComp[nc]],namate,a,z,rho,X0,absl,buf,nbuf);
1283eee5 487
488 amat[nc] = a;
489 zmat[nc] = z;
490
491 Int_t nnc = (fMixtComp[nc]>=20) ? fMixtComp[nc]%20 : fMixtComp[nc]%10;
492
37831078 493 am += fMixtProp[nc]*((fMixtComp[nc]>=20) ? apure[nnc] : amol[nnc]);
1283eee5 494 density += fMixtProp[nc]*rho; // density of the mixture
495
496 }
497
498 // mixture proportions by weight!
499
500 for(nc = 0;nc<fNoComp;nc++)
501 {
502
503 Int_t nnc = (fMixtComp[nc]>=20) ? fMixtComp[nc]%20 : fMixtComp[nc]%10;
504
37831078 505 wmat[nc] = fMixtProp[nc]*((fMixtComp[nc]>=20) ?
506 apure[nnc] : amol[nnc])/am;
507
508 }
509
510 // Drift gases 1 - nonsensitive, 2 - sensitive
1283eee5 511
1283eee5 512 AliMixture(31,"Drift gas 1",amat,zmat,density,fNoComp,wmat);
513 AliMixture(32,"Drift gas 2",amat,zmat,density,fNoComp,wmat);
1283eee5 514
1283eee5 515
37831078 516 // Air
517
518 amat[0] = 14.61;
519 zmat[0] = 7.3;
520 density = 0.001205;
1283eee5 521
37831078 522 AliMaterial(24,"Air",amat[0],zmat[0],density,999.,999.);
1283eee5 523
1283eee5 524
525 //----------------------------------------------------------------------
526 // solid materials
527 //----------------------------------------------------------------------
528
1283eee5 529
37831078 530 // Kevlar C14H22O2N2
1283eee5 531
37831078 532 amat[0] = 12.011;
533 amat[1] = 1.;
534 amat[2] = 15.999;
535 amat[3] = 14.006;
1283eee5 536
37831078 537 zmat[0] = 6.;
538 zmat[1] = 1.;
539 zmat[2] = 8.;
540 zmat[3] = 7.;
541
542 wmat[0] = 14.;
543 wmat[1] = 22.;
544 wmat[2] = 2.;
545 wmat[3] = 2.;
546
547 density = 1.45;
548
549 AliMixture(34,"Kevlar",amat,zmat,density,-4,wmat);
550
551 // NOMEX
1283eee5 552
37831078 553 amat[0] = 12.011;
554 amat[1] = 1.;
555 amat[2] = 15.999;
556 amat[3] = 14.006;
557
558 zmat[0] = 6.;
559 zmat[1] = 1.;
560 zmat[2] = 8.;
561 zmat[3] = 7.;
562
563 wmat[0] = 14.;
564 wmat[1] = 22.;
565 wmat[2] = 2.;
566 wmat[3] = 2.;
567
568 density = 0.03;
1283eee5 569
fe4da5cc 570
37831078 571 AliMixture(35,"NOMEX",amat,zmat,density,-4,wmat);
572
573 // Makrolon C16H18O3
574
575 amat[0] = 12.011;
576 amat[1] = 1.;
577 amat[2] = 15.999;
1283eee5 578
37831078 579 zmat[0] = 6.;
580 zmat[1] = 1.;
581 zmat[2] = 8.;
582
583 wmat[0] = 16.;
584 wmat[1] = 18.;
585 wmat[2] = 3.;
586
587 density = 1.2;
588
589 AliMixture(36,"Makrolon",amat,zmat,density,-3,wmat);
590
1283eee5 591 // Mylar C5H4O2
592
593 amat[0]=12.011;
594 amat[1]=1.;
595 amat[2]=15.9994;
596
597 zmat[0]=6.;
598 zmat[1]=1.;
599 zmat[2]=8.;
600
601 wmat[0]=5.;
602 wmat[1]=4.;
603 wmat[2]=2.;
604
605 density = 1.39;
fe4da5cc 606
37831078 607 AliMixture(37, "Mylar",amat,zmat,density,-3,wmat);
1283eee5 608
37831078 609 // G10 60% SiO2 + 40% epoxy, I use A and Z for SiO2
1283eee5 610
37831078 611 amat[0]=28.086;
612 amat[1]=15.9994;
1283eee5 613
37831078 614 zmat[0]=14.;
615 zmat[1]=8.;
1283eee5 616
37831078 617 wmat[0]=1.;
618 wmat[1]=2.;
1283eee5 619
37831078 620 density = 1.7;
1283eee5 621
37831078 622 AliMixture(38,"SiO2",amat,zmat,2.2,-2,wmat); //SiO2 - quartz
623
624 gMC->Gfmate((*fIdmate)[38],namate,amat[0],zmat[0],rho,X0,absl,buf,nbuf);
1283eee5 625
37831078 626 AliMaterial(39,"G10",amat[0],zmat[0],density,999.,999.);
1283eee5 627
37831078 628 // Al
1283eee5 629
37831078 630 amat[0] = 26.98;
631 zmat[0] = 13.;
1283eee5 632
37831078 633 density = 2.7;
1283eee5 634
37831078 635 AliMaterial(40,"Al",amat[0],zmat[0],density,999.,999.);
1283eee5 636
37831078 637 // Si
1283eee5 638
37831078 639 amat[0] = 28.086;
9a3667bd 640 zmat[0] = 14.;
1283eee5 641
37831078 642 density = 2.33;
1283eee5 643
37831078 644 AliMaterial(41,"Si",amat[0],zmat[0],density,999.,999.);
1283eee5 645
37831078 646 // Cu
1283eee5 647
37831078 648 amat[0] = 63.546;
649 zmat[0] = 29.;
1283eee5 650
37831078 651 density = 8.96;
1283eee5 652
37831078 653 AliMaterial(42,"Cu",amat[0],zmat[0],density,999.,999.);
1283eee5 654
37831078 655 // Tedlar C2H3F
1283eee5 656
37831078 657 amat[0] = 12.011;
658 amat[1] = 1.;
659 amat[2] = 18.998;
1283eee5 660
37831078 661 zmat[0] = 6.;
662 zmat[1] = 1.;
663 zmat[2] = 9.;
1283eee5 664
37831078 665 wmat[0] = 2.;
666 wmat[1] = 3.;
667 wmat[2] = 1.;
1283eee5 668
37831078 669 density = 1.71;
1283eee5 670
37831078 671 AliMixture(43, "Tedlar",amat,zmat,density,-3,wmat);
1283eee5 672
1283eee5 673
37831078 674 // Plexiglas C5H8O2
1283eee5 675
37831078 676 amat[0]=12.011;
677 amat[1]=1.;
678 amat[2]=15.9994;
1283eee5 679
37831078 680 zmat[0]=6.;
681 zmat[1]=1.;
682 zmat[2]=8.;
1283eee5 683
37831078 684 wmat[0]=5.;
685 wmat[1]=8.;
686 wmat[2]=2.;
1283eee5 687
37831078 688 density=1.18;
1283eee5 689
37831078 690 AliMixture(44,"Plexiglas",amat,zmat,density,-3,wmat);
1283eee5 691
5a28a08f 692 // Lexan - I use it for epoxy - similar X0 C16H14O3
1283eee5 693
5a28a08f 694
695 amat[0]=12.011;
696 amat[1]=1.;
697 amat[2]=15.9994;
698
699 zmat[0]=6.;
700 zmat[1]=1.;
701 zmat[2]=8.;
702
703 wmat[0]=16.;
704 wmat[1]=1.;
705 wmat[2]=3.;
706
707 density=1.2;
708
709 AliMixture(45,"Epoxy",amat,zmat,density,-3,wmat);
37831078 710
711 //----------------------------------------------------------
712 // tracking media for gases
713 //----------------------------------------------------------
714
715 AliMedium(0, "Air", 24, 0, iSXFLD, sXMGMX, 10., 999., .1, .01, .1);
716 AliMedium(1, "Drift gas 1", 31, 0, iSXFLD, sXMGMX, 10., 999.,.1,.001, .001);
717 AliMedium(2, "Drift gas 2", 32, 1, iSXFLD, sXMGMX, 10., 999.,.1,.001, .001);
718 AliMedium(3,"CO2",10,0, iSXFLD, sXMGMX, 10., 999.,.1, .001, .001);
719
720 //-----------------------------------------------------------
721 // tracking media for solids
722 //-----------------------------------------------------------
723
724 AliMedium(4,"Al",40,0, iSXFLD, sXMGMX, 10., 999., .1, .0005, .001);
725 AliMedium(5,"Kevlar",34,0, iSXFLD, sXMGMX, 10., 999., .1, .0005, .001);
726 AliMedium(6,"Nomex",35,0, iSXFLD, sXMGMX, 10., 999., .1, .001, .001);
727 AliMedium(7,"Makrolon",36,0, iSXFLD, sXMGMX, 10., 999., .1, .001, .001);
728 AliMedium(8,"Mylar",37,0, iSXFLD, sXMGMX, 10., 999., .1, .0005, .001);
729 AliMedium(9,"Tedlar",43,0, iSXFLD, sXMGMX, 10., 999., .1, .0005, .001);
730 AliMedium(10,"Cu",42,0, iSXFLD, sXMGMX, 10., 999., .1, .001, .001);
731 AliMedium(11,"Si",41,0, iSXFLD, sXMGMX, 10., 999., .1, .001, .001);
732 AliMedium(12,"G10",39,0, iSXFLD, sXMGMX, 10., 999., .1, .001, .001);
733 AliMedium(13,"Plexiglas",44,0, iSXFLD, sXMGMX, 10., 999., .1, .001, .001);
5a28a08f 734 AliMedium(14,"Epoxy",45,0, iSXFLD, sXMGMX, 10., 999., .1, .0005, .001);
1283eee5 735
fe4da5cc 736}
737
fe4da5cc 738
73042f01 739void AliTPC::Digits2Clusters(TFile *of)
fe4da5cc 740{
3c0f9266 741 //-----------------------------------------------------------------
742 // This is a simple cluster finder.
3c0f9266 743 //-----------------------------------------------------------------
73042f01 744 AliTPCclusterer::Digits2Clusters(fTPCParam,of);
fe4da5cc 745}
746
73042f01 747extern Double_t SigmaY2(Double_t, Double_t, Double_t);
748extern Double_t SigmaZ2(Double_t, Double_t);
fe4da5cc 749//_____________________________________________________________________________
73042f01 750void AliTPC::Hits2Clusters(TFile *of)
fe4da5cc 751{
8c555625 752 //--------------------------------------------------------
fe4da5cc 753 // TPC simple cluster generator from hits
754 // obtained from the TPC Fast Simulator
8c555625 755 // The point errors are taken from the parametrization
756 //--------------------------------------------------------
757
758 //-----------------------------------------------------------------
759 // Origin: Marek Kowalski IFJ, Krakow, Marek.Kowalski@ifj.edu.pl
760 //-----------------------------------------------------------------
73042f01 761 // Adopted to Marian's cluster data structure by I.Belikov, CERN,
762 // Jouri.Belikov@cern.ch
763 //----------------------------------------------------------------
764
765 /////////////////////////////////////////////////////////////////////////////
766 //
767 //---------------------------------------------------------------------
768 // ALICE TPC Cluster Parameters
769 //--------------------------------------------------------------------
770
771
772
773 // Cluster width in rphi
774 const Float_t kACrphi=0.18322;
775 const Float_t kBCrphi=0.59551e-3;
776 const Float_t kCCrphi=0.60952e-1;
777 // Cluster width in z
778 const Float_t kACz=0.19081;
779 const Float_t kBCz=0.55938e-3;
780 const Float_t kCCz=0.30428;
781
782 TDirectory *savedir=gDirectory;
783
784 if (!of->IsOpen()) {
785 cerr<<"AliTPC::Hits2Clusters(): output file not open !\n";
786 return;
787 }
3c0f9266 788
cc80f89e 789 if(fTPCParam == 0){
790 printf("AliTPCParam MUST be created firstly\n");
791 return;
792 }
793
73042f01 794 Float_t sigmaRphi,sigmaZ,clRphi,clZ;
fe4da5cc 795 //
1578254f 796 TParticle *particle; // pointer to a given particle
fe4da5cc 797 AliTPChit *tpcHit; // pointer to a sigle TPC hit
39c8eb58 798 Int_t sector;
fe4da5cc 799 Int_t ipart;
800 Float_t xyz[5];
801 Float_t pl,pt,tanth,rpad,ratio;
fe4da5cc 802 Float_t cph,sph;
803
804 //---------------------------------------------------------------
805 // Get the access to the tracks
806 //---------------------------------------------------------------
807
73042f01 808 TTree *tH = gAlice->TreeH();
809 Stat_t ntracks = tH->GetEntries();
73042f01 810
811 //Switch to the output file
812 of->cd();
813
814 fTPCParam->Write(fTPCParam->GetTitle());
815 AliTPCClustersArray carray;
816 carray.Setup(fTPCParam);
817 carray.SetClusterType("AliTPCcluster");
818 carray.MakeTree();
819
820 Int_t nclusters=0; //cluster counter
fe4da5cc 821
822 //------------------------------------------------------------
cc80f89e 823 // Loop over all sectors (72 sectors for 20 deg
824 // segmentation for both lower and upper sectors)
825 // Sectors 0-35 are lower sectors, 0-17 z>0, 17-35 z<0
3c0f9266 826 // Sectors 36-71 are upper sectors, 36-53 z>0, 54-71 z<0
fe4da5cc 827 //
3c0f9266 828 // First cluster for sector 0 starts at "0"
fe4da5cc 829 //------------------------------------------------------------
cc80f89e 830
831 for(Int_t isec=0;isec<fTPCParam->GetNSector();isec++){
8c555625 832 //MI change
cc80f89e 833 fTPCParam->AdjustCosSin(isec,cph,sph);
fe4da5cc 834
835 //------------------------------------------------------------
836 // Loop over tracks
837 //------------------------------------------------------------
838
839 for(Int_t track=0;track<ntracks;track++){
840 ResetHits();
73042f01 841 tH->GetEvent(track);
fe4da5cc 842 //
73042f01 843 // Get number of the TPC hits
fe4da5cc 844 //
39c8eb58 845 // nhits=fHits->GetEntriesFast();
fe4da5cc 846 //
39c8eb58 847
848 tpcHit = (AliTPChit*)FirstHit(-1);
849
fe4da5cc 850 // Loop over hits
851 //
39c8eb58 852 // for(Int_t hit=0;hit<nhits;hit++){
853 //tpcHit=(AliTPChit*)fHits->UncheckedAt(hit);
854
855 while(tpcHit){
856
857 if (tpcHit->fQ == 0.) {
858 tpcHit = (AliTPChit*) NextHit();
859 continue; //information about track (I.Belikov)
860 }
fe4da5cc 861 sector=tpcHit->fSector; // sector number
39c8eb58 862
863
864 // if(sector != isec) continue; //terminate iteration
865
866 if(sector != isec){
867 tpcHit = (AliTPChit*) NextHit();
868 continue;
869 }
94de3818 870 ipart=tpcHit->Track();
2ab0c725 871 particle=gAlice->Particle(ipart);
1578254f 872 pl=particle->Pz();
873 pt=particle->Pt();
fe4da5cc 874 if(pt < 1.e-9) pt=1.e-9;
875 tanth=pl/pt;
876 tanth = TMath::Abs(tanth);
94de3818 877 rpad=TMath::Sqrt(tpcHit->X()*tpcHit->X() + tpcHit->Y()*tpcHit->Y());
fe4da5cc 878 ratio=0.001*rpad/pt; // pt must be in MeV/c - historical reason
73042f01 879
fe4da5cc 880 // space-point resolutions
881
73042f01 882 sigmaRphi=SigmaY2(rpad,tanth,pt);
883 sigmaZ =SigmaZ2(rpad,tanth );
fe4da5cc 884
885 // cluster widths
886
73042f01 887 clRphi=kACrphi-kBCrphi*rpad*tanth+kCCrphi*ratio*ratio;
888 clZ=kACz-kBCz*rpad*tanth+kCCz*tanth*tanth;
fe4da5cc 889
890 // temporary protection
891
73042f01 892 if(sigmaRphi < 0.) sigmaRphi=0.4e-3;
893 if(sigmaZ < 0.) sigmaZ=0.4e-3;
894 if(clRphi < 0.) clRphi=2.5e-3;
895 if(clZ < 0.) clZ=2.5e-5;
fe4da5cc 896
897 //
cc80f89e 898
899 //
900 // smearing --> rotate to the 1 (13) or to the 25 (49) sector,
fe4da5cc 901 // then the inaccuracy in a X-Y plane is only along Y (pad row)!
902 //
94de3818 903 Float_t xprim= tpcHit->X()*cph + tpcHit->Y()*sph;
904 Float_t yprim=-tpcHit->X()*sph + tpcHit->Y()*cph;
73042f01 905 xyz[0]=gRandom->Gaus(yprim,TMath::Sqrt(sigmaRphi)); // y
906 Float_t alpha=(isec < fTPCParam->GetNInnerSector()) ?
907 fTPCParam->GetInnerAngle() : fTPCParam->GetOuterAngle();
908 Float_t ymax=xprim*TMath::Tan(0.5*alpha);
909 if (TMath::Abs(xyz[0])>ymax) xyz[0]=yprim;
94de3818 910 xyz[1]=gRandom->Gaus(tpcHit->Z(),TMath::Sqrt(sigmaZ)); // z
911 if (TMath::Abs(xyz[1])>fTPCParam->GetZLength()) xyz[1]=tpcHit->Z();
39c8eb58 912 xyz[2]=sigmaRphi; // fSigmaY2
913 xyz[3]=sigmaZ; // fSigmaZ2
914 xyz[4]=tpcHit->fQ; // q
73042f01 915
916 AliTPCClustersRow *clrow=carray.GetRow(sector,tpcHit->fPadRow);
917 if (!clrow) clrow=carray.CreateRow(sector,tpcHit->fPadRow);
918
94de3818 919 Int_t tracks[3]={tpcHit->Track(), -1, -1};
39c8eb58 920 AliTPCcluster cluster(tracks,xyz);
73042f01 921
922 clrow->InsertCluster(&cluster); nclusters++;
923
39c8eb58 924 tpcHit = (AliTPChit*)NextHit();
925
926
fe4da5cc 927 } // end of loop over hits
73042f01 928
929 } // end of loop over tracks
930
931 Int_t nrows=fTPCParam->GetNRow(isec);
932 for (Int_t irow=0; irow<nrows; irow++) {
933 AliTPCClustersRow *clrow=carray.GetRow(isec,irow);
934 if (!clrow) continue;
935 carray.StoreRow(isec,irow);
936 carray.ClearRow(isec,irow);
937 }
938
cc80f89e 939 } // end of loop over sectors
73042f01 940
941 cerr<<"Number of made clusters : "<<nclusters<<" \n";
942
943 carray.GetTree()->Write();
944
945 savedir->cd(); //switch back to the input file
cc80f89e 946
947} // end of function
948
949//_________________________________________________________________
950void AliTPC::Hits2ExactClustersSector(Int_t isec)
951{
952 //--------------------------------------------------------
953 //calculate exact cross point of track and given pad row
954 //resulting values are expressed in "digit" coordinata
955 //--------------------------------------------------------
956
957 //-----------------------------------------------------------------
958 // Origin: Marian Ivanov GSI Darmstadt, m.ivanov@gsi.de
959 //-----------------------------------------------------------------
960 //
961 if (fClustersArray==0){
962 return;
963 }
964 //
965 TParticle *particle; // pointer to a given particle
966 AliTPChit *tpcHit; // pointer to a sigle TPC hit
cc80f89e 967 Int_t sector,nhits;
968 Int_t ipart;
73042f01 969 const Int_t kcmaxhits=30000;
970 TVector * xxxx = new TVector(kcmaxhits*4);
cc80f89e 971 TVector & xxx = *xxxx;
73042f01 972 Int_t maxhits = kcmaxhits;
cc80f89e 973 //construct array for each padrow
974 for (Int_t i=0; i<fTPCParam->GetNRow(isec);i++)
975 fClustersArray->CreateRow(isec,i);
fe4da5cc 976
cc80f89e 977 //---------------------------------------------------------------
978 // Get the access to the tracks
979 //---------------------------------------------------------------
980
73042f01 981 TTree *tH = gAlice->TreeH();
982 Stat_t ntracks = tH->GetEntries();
2ab0c725 983 Int_t npart = gAlice->GetNtrack();
cc80f89e 984
985 //------------------------------------------------------------
986 // Loop over tracks
987 //------------------------------------------------------------
fe4da5cc 988
cc80f89e 989 for(Int_t track=0;track<ntracks;track++){
990 ResetHits();
73042f01 991 tH->GetEvent(track);
cc80f89e 992 //
993 // Get number of the TPC hits and a pointer
994 // to the particles
995 //
996 nhits=fHits->GetEntriesFast();
997 //
998 // Loop over hits
999 //
1000 Int_t currentIndex=0;
1001 Int_t lastrow=-1; //last writen row
1002 for(Int_t hit=0;hit<nhits;hit++){
1003 tpcHit=(AliTPChit*)fHits->UncheckedAt(hit);
1004 if (tpcHit==0) continue;
1005 sector=tpcHit->fSector; // sector number
1006 if(sector != isec) continue;
94de3818 1007 ipart=tpcHit->Track();
2ab0c725 1008 if (ipart<npart) particle=gAlice->Particle(ipart);
cc80f89e 1009
1010 //find row number
1011
94de3818 1012 Float_t x[3]={tpcHit->X(),tpcHit->Y(),tpcHit->Z()};
cc80f89e 1013 Int_t index[3]={1,isec,0};
1014 Int_t currentrow = fTPCParam->GetPadRow(x,index) ;
1015 if (currentrow<0) continue;
1016 if (lastrow<0) lastrow=currentrow;
1017 if (currentrow==lastrow){
1018 if ( currentIndex>=maxhits){
73042f01 1019 maxhits+=kcmaxhits;
cc80f89e 1020 xxx.ResizeTo(4*maxhits);
1021 }
1022 xxx(currentIndex*4)=x[0];
1023 xxx(currentIndex*4+1)=x[1];
1024 xxx(currentIndex*4+2)=x[2];
1025 xxx(currentIndex*4+3)=tpcHit->fQ;
1026 currentIndex++;
1027 }
1028 else
1029 if (currentIndex>2){
1030 Float_t sumx=0;
1031 Float_t sumx2=0;
1032 Float_t sumx3=0;
1033 Float_t sumx4=0;
1034 Float_t sumy=0;
1035 Float_t sumxy=0;
1036 Float_t sumx2y=0;
1037 Float_t sumz=0;
1038 Float_t sumxz=0;
1039 Float_t sumx2z=0;
1040 Float_t sumq=0;
1041 for (Int_t index=0;index<currentIndex;index++){
1042 Float_t x,x2,x3,x4;
1043 x=x2=x3=x4=xxx(index*4);
1044 x2*=x;
1045 x3*=x2;
1046 x4*=x3;
1047 sumx+=x;
1048 sumx2+=x2;
1049 sumx3+=x3;
1050 sumx4+=x4;
1051 sumy+=xxx(index*4+1);
1052 sumxy+=xxx(index*4+1)*x;
1053 sumx2y+=xxx(index*4+1)*x2;
1054 sumz+=xxx(index*4+2);
1055 sumxz+=xxx(index*4+2)*x;
1056 sumx2z+=xxx(index*4+2)*x2;
1057 sumq+=xxx(index*4+3);
1058 }
73042f01 1059 Float_t centralPad = (fTPCParam->GetNPads(isec,lastrow)-1)/2;
cc80f89e 1060 Float_t det=currentIndex*(sumx2*sumx4-sumx3*sumx3)-sumx*(sumx*sumx4-sumx2*sumx3)+
1061 sumx2*(sumx*sumx3-sumx2*sumx2);
1062
1063 Float_t detay=sumy*(sumx2*sumx4-sumx3*sumx3)-sumx*(sumxy*sumx4-sumx2y*sumx3)+
1064 sumx2*(sumxy*sumx3-sumx2y*sumx2);
1065 Float_t detaz=sumz*(sumx2*sumx4-sumx3*sumx3)-sumx*(sumxz*sumx4-sumx2z*sumx3)+
1066 sumx2*(sumxz*sumx3-sumx2z*sumx2);
1067
1068 Float_t detby=currentIndex*(sumxy*sumx4-sumx2y*sumx3)-sumy*(sumx*sumx4-sumx2*sumx3)+
1069 sumx2*(sumx*sumx2y-sumx2*sumxy);
1070 Float_t detbz=currentIndex*(sumxz*sumx4-sumx2z*sumx3)-sumz*(sumx*sumx4-sumx2*sumx3)+
1071 sumx2*(sumx*sumx2z-sumx2*sumxz);
1072
73042f01 1073 Float_t y=detay/det+centralPad;
cc80f89e 1074 Float_t z=detaz/det;
1075 Float_t by=detby/det; //y angle
1076 Float_t bz=detbz/det; //z angle
1077 sumy/=Float_t(currentIndex);
1078 sumz/=Float_t(currentIndex);
2b06d5c3 1079 AliComplexCluster cl;
cc80f89e 1080 cl.fX=z;
1081 cl.fY=y;
1082 cl.fQ=sumq;
1083 cl.fSigmaX2=bz;
1084 cl.fSigmaY2=by;
1085 cl.fTracks[0]=ipart;
1086
1087 AliTPCClustersRow * row = (fClustersArray->GetRow(isec,lastrow));
1088 if (row!=0) row->InsertCluster(&cl);
1089 currentIndex=0;
1090 lastrow=currentrow;
1091 } //end of calculating cluster for given row
1092
1093
1094
1095 } // end of loop over hits
1096 } // end of loop over tracks
1097 //write padrows to tree
1098 for (Int_t ii=0; ii<fTPCParam->GetNRow(isec);ii++) {
1099 fClustersArray->StoreRow(isec,ii);
1100 fClustersArray->ClearRow(isec,ii);
1101 }
1102 xxxx->Delete();
1103
fe4da5cc 1104}
2ab0c725 1105//___________________________________________
1106void AliTPC::SDigits2Digits()
1107{
1108 AliTPCParamSR *param=(AliTPCParamSR*)gDirectory->Get("75x40_100x60");
1109 AliTPCPRF2D * prfinner = new AliTPCPRF2D;
1110 AliTPCPRF2D * prfouter = new AliTPCPRF2D;
1111 AliTPCRF1D * rf = new AliTPCRF1D(kTRUE);
1112
1113 TDirectory *cwd = gDirectory;
1114 rf->SetGauss(param->GetZSigma(),param->GetZWidth(),1.);
1115 rf->SetOffset(3*param->GetZSigma());
1116 rf->Update();
1117 TFile *f=TFile::Open("$ALICE_ROOT/TPC/AliTPCprf2d.root");
1118 if (!f->IsOpen()) {
1119 cerr<<"Can't open $ALICE_ROOT/TPC/AliTPCprf2d.root !\n";
1120 exit(3);
1121 }
1122 prfinner->Read("prf_07504_Gati_056068_d02");
1123 prfouter->Read("prf_10006_Gati_047051_d03");
1124 f->Close();
1125 cwd->cd();
1126
1127 param->SetInnerPRF(prfinner);
1128 param->SetOuterPRF(prfouter);
1129 param->SetTimeRF(rf);
1130
1131 SetParam(param);
1132
1133 cerr<<"Digitizing TPC...\n";
1134
1135 //setup TPCDigitsArray
1136 AliTPCDigitsArray *arr = new AliTPCDigitsArray;
1137 arr->SetClass("AliSimDigits");
1138 arr->Setup(param);
1139 SetParam(param);
1140
1141 arr->MakeTree(fDigitsFile);
1142
1143 SetDigitsArray(arr);
1144
1145 Hits2Digits();
1146
1147 // Hits2DigitsSector(1);
1148 // Hits2DigitsSector(2);
1149 // Hits2DigitsSector(3);
1150 // Hits2DigitsSector(1+18);
1151 // Hits2DigitsSector(2+18);
1152 // Hits2DigitsSector(3+18);
1153
1154 // Hits2DigitsSector(36+1);
1155 // Hits2DigitsSector(36+2);
1156 // Hits2DigitsSector(36+3);
1157 // Hits2DigitsSector(36+1+18);
1158 // Hits2DigitsSector(36+2+18);
1159 // Hits2DigitsSector(36+3+18);
1160
1161 //write results
1162
1163 char treeName[100];
1164 sprintf(treeName,"TreeD_%s",param->GetTitle());
1165 GetDigitsArray()->GetTree()->Write(treeName,TObject::kOverwrite);
1166}
fe4da5cc 1167
cc80f89e 1168//__________________________________________________________________
8c555625 1169void AliTPC::Hits2Digits()
1170{
8c555625 1171 //----------------------------------------------------
cc80f89e 1172 // Loop over all sectors
1173 //----------------------------------------------------
1174
1175 if(fTPCParam == 0){
1176 printf("AliTPCParam MUST be created firstly\n");
1177 return;
1178 }
1179
1180 for(Int_t isec=0;isec<fTPCParam->GetNSector();isec++) Hits2DigitsSector(isec);
1181
8c555625 1182}
1183
1184
fe4da5cc 1185//_____________________________________________________________________________
8c555625 1186void AliTPC::Hits2DigitsSector(Int_t isec)
fe4da5cc 1187{
8c555625 1188 //-------------------------------------------------------------------
fe4da5cc 1189 // TPC conversion from hits to digits.
8c555625 1190 //-------------------------------------------------------------------
1191
1192 //-----------------------------------------------------------------
1193 // Origin: Marek Kowalski IFJ, Krakow, Marek.Kowalski@ifj.edu.pl
1194 //-----------------------------------------------------------------
1195
fe4da5cc 1196 //-------------------------------------------------------
8c555625 1197 // Get the access to the track hits
fe4da5cc 1198 //-------------------------------------------------------
8c555625 1199
cc80f89e 1200
73042f01 1201 TTree *tH = gAlice->TreeH(); // pointer to the hits tree
1202 Stat_t ntracks = tH->GetEntries();
8c555625 1203
1204 if( ntracks > 0){
1205
1206 //-------------------------------------------
1207 // Only if there are any tracks...
1208 //-------------------------------------------
1209
8c555625 1210 TObjArray **row;
fe4da5cc 1211
5a28a08f 1212 //printf("*** Processing sector number %d ***\n",isec);
8c555625 1213
1214 Int_t nrows =fTPCParam->GetNRow(isec);
1215
1216 row= new TObjArray* [nrows];
fe4da5cc 1217
73042f01 1218 MakeSector(isec,nrows,tH,ntracks,row);
8c555625 1219
1220 //--------------------------------------------------------
1221 // Digitize this sector, row by row
1222 // row[i] is the pointer to the TObjArray of TVectors,
1223 // each one containing electrons accepted on this
1224 // row, assigned into tracks
1225 //--------------------------------------------------------
1226
1227 Int_t i;
1228
2ab0c725 1229 if (fDigitsArray->GetTree()==0) fDigitsArray->MakeTree(fDigitsFile);
8c555625 1230
cc80f89e 1231 for (i=0;i<nrows;i++){
8c555625 1232
5a28a08f 1233 AliDigits * dig = fDigitsArray->CreateRow(isec,i);
8c555625 1234
cc80f89e 1235 DigitizeRow(i,isec,row);
8c555625 1236
cc80f89e 1237 fDigitsArray->StoreRow(isec,i);
8c555625 1238
73042f01 1239 Int_t ndig = dig->GetDigitSize();
5a28a08f 1240
cc80f89e 1241
5a28a08f 1242 //printf("*** Sector, row, compressed digits %d %d %d ***\n",isec,i,ndig);
cc80f89e 1243
1244 fDigitsArray->ClearRow(isec,i);
8c555625 1245
cc80f89e 1246
8c555625 1247 } // end of the sector digitization
8c555625 1248
cc80f89e 1249 for(i=0;i<nrows;i++){
39c8eb58 1250 row[i]->Delete();
1251 delete row[i];
cc80f89e 1252 }
1253
8c555625 1254 delete [] row; // delete the array of pointers to TObjArray-s
1255
1256 } // ntracks >0
8c555625 1257
cc80f89e 1258} // end of Hits2DigitsSector
8c555625 1259
8c555625 1260
8c555625 1261//_____________________________________________________________________________
cc80f89e 1262void AliTPC::DigitizeRow(Int_t irow,Int_t isec,TObjArray **rows)
8c555625 1263{
1264 //-----------------------------------------------------------
1265 // Single row digitization, coupling from the neighbouring
1266 // rows taken into account
1267 //-----------------------------------------------------------
1268
1269 //-----------------------------------------------------------------
1270 // Origin: Marek Kowalski IFJ, Krakow, Marek.Kowalski@ifj.edu.pl
cc80f89e 1271 // Modified: Marian Ivanov GSI Darmstadt, m.ivanov@gsi.de
8c555625 1272 //-----------------------------------------------------------------
1273
1274
8c555625 1275 Float_t zerosup = fTPCParam->GetZeroSup();
1276 Int_t nrows =fTPCParam->GetNRow(isec);
cc80f89e 1277 fCurrentIndex[1]= isec;
8c555625 1278
8c555625 1279
73042f01 1280 Int_t nofPads = fTPCParam->GetNPads(isec,irow);
1281 Int_t nofTbins = fTPCParam->GetMaxTBin();
1282 Int_t indexRange[4];
8c555625 1283 //
1284 // Integrated signal for this row
1285 // and a single track signal
cc80f89e 1286 //
73042f01 1287 TMatrix *m1 = new TMatrix(0,nofPads,0,nofTbins); // integrated
1288 TMatrix *m2 = new TMatrix(0,nofPads,0,nofTbins); // single
8c555625 1289 //
73042f01 1290 TMatrix &total = *m1;
8c555625 1291
1292 // Array of pointers to the label-signal list
1293
73042f01 1294 Int_t nofDigits = nofPads*nofTbins; // number of digits for this row
1295 Float_t **pList = new Float_t* [nofDigits];
8c555625 1296
1297 Int_t lp;
cc80f89e 1298 Int_t i1;
73042f01 1299 for(lp=0;lp<nofDigits;lp++)pList[lp]=0; // set all pointers to NULL
8c555625 1300 //
cc80f89e 1301 //calculate signal
1302 //
1303 Int_t row1 = TMath::Max(irow-fTPCParam->GetNCrossRows(),0);
1304 Int_t row2 = TMath::Min(irow+fTPCParam->GetNCrossRows(),nrows-1);
1305 for (Int_t row= row1;row<=row2;row++){
1306 Int_t nTracks= rows[row]->GetEntries();
1307 for (i1=0;i1<nTracks;i1++){
1308 fCurrentIndex[2]= row;
1309 fCurrentIndex[3]=irow;
1310 if (row==irow){
1311 m2->Zero(); // clear single track signal matrix
73042f01 1312 Float_t trackLabel = GetSignal(rows[row],i1,m2,m1,indexRange);
1313 GetList(trackLabel,nofPads,m2,indexRange,pList);
cc80f89e 1314 }
73042f01 1315 else GetSignal(rows[row],i1,0,m1,indexRange);
cc80f89e 1316 }
8c555625 1317 }
cc80f89e 1318
8c555625 1319 Int_t tracks[3];
8c555625 1320
cc80f89e 1321 AliDigits *dig = fDigitsArray->GetRow(isec,irow);
73042f01 1322 for(Int_t ip=0;ip<nofPads;ip++){
1323 for(Int_t it=0;it<nofTbins;it++){
8c555625 1324
73042f01 1325 Float_t q = total(ip,it);
8c555625 1326
73042f01 1327 Int_t gi =it*nofPads+ip; // global index
8c555625 1328
cc80f89e 1329 q = gRandom->Gaus(q,fTPCParam->GetNoise()*fTPCParam->GetNoiseNormFac());
8c555625 1330
cc80f89e 1331 q = (Int_t)q;
1332
1333 if(q <=zerosup) continue; // do not fill zeros
73042f01 1334 if(q > fTPCParam->GetADCSat()) q = fTPCParam->GetADCSat(); // saturation
8c555625 1335
1336 //
1337 // "real" signal or electronic noise (list = -1)?
1338 //
1339
1340 for(Int_t j1=0;j1<3;j1++){
1341 tracks[j1] = (pList[gi]) ?(Int_t)(*(pList[gi]+j1)) : -1;
1342 }
1343
cc80f89e 1344//Begin_Html
1345/*
1346 <A NAME="AliDigits"></A>
1347 using of AliDigits object
1348*/
1349//End_Html
1350 dig->SetDigitFast((Short_t)q,it,ip);
1351 if (fDigitsArray->IsSimulated())
1352 {
1353 ((AliSimDigits*)dig)->SetTrackIDFast(tracks[0],it,ip,0);
1354 ((AliSimDigits*)dig)->SetTrackIDFast(tracks[1],it,ip,1);
1355 ((AliSimDigits*)dig)->SetTrackIDFast(tracks[2],it,ip,2);
1356 }
1357
8c555625 1358
1359 } // end of loop over time buckets
1360 } // end of lop over pads
1361
1362 //
1363 // This row has been digitized, delete nonused stuff
1364 //
1365
73042f01 1366 for(lp=0;lp<nofDigits;lp++){
8c555625 1367 if(pList[lp]) delete [] pList[lp];
1368 }
1369
1370 delete [] pList;
1371
1372 delete m1;
1373 delete m2;
cc80f89e 1374 // delete m3;
8c555625 1375
1376} // end of DigitizeRow
cc80f89e 1377
8c555625 1378//_____________________________________________________________________________
cc80f89e 1379
1380Float_t AliTPC::GetSignal(TObjArray *p1, Int_t ntr, TMatrix *m1, TMatrix *m2,
73042f01 1381 Int_t *indexRange)
8c555625 1382{
1383
1384 //---------------------------------------------------------------
1385 // Calculates 2-D signal (pad,time) for a single track,
1386 // returns a pointer to the signal matrix and the track label
1387 // No digitization is performed at this level!!!
1388 //---------------------------------------------------------------
1389
1390 //-----------------------------------------------------------------
1391 // Origin: Marek Kowalski IFJ, Krakow, Marek.Kowalski@ifj.edu.pl
cc80f89e 1392 // Modified: Marian Ivanov
8c555625 1393 //-----------------------------------------------------------------
1394
1395 TVector *tv;
8c555625 1396
8c555625 1397 tv = (TVector*)p1->At(ntr); // pointer to a track
1398 TVector &v = *tv;
1399
1400 Float_t label = v(0);
73042f01 1401 Int_t centralPad = (fTPCParam->GetNPads(fCurrentIndex[1],fCurrentIndex[3])-1)/2;
8c555625 1402
8c555625 1403 Int_t nElectrons = (tv->GetNrows()-1)/4;
73042f01 1404 indexRange[0]=9999; // min pad
1405 indexRange[1]=-1; // max pad
1406 indexRange[2]=9999; //min time
1407 indexRange[3]=-1; // max time
8c555625 1408
cc80f89e 1409 // Float_t IneffFactor = 0.5; // inefficiency in the gain close to the edge, as above
1410
1411 TMatrix &signal = *m1;
1412 TMatrix &total = *m2;
8c555625 1413 //
1414 // Loop over all electrons
1415 //
8c555625 1416 for(Int_t nel=0; nel<nElectrons; nel++){
cc80f89e 1417 Int_t idx=nel*4;
1418 Float_t aval = v(idx+4);
1419 Float_t eltoadcfac=aval*fTPCParam->GetTotalNormFac();
1420 Float_t xyz[3]={v(idx+1),v(idx+2),v(idx+3)};
1421 Int_t n = fTPCParam->CalcResponse(xyz,fCurrentIndex,fCurrentIndex[3]);
8c555625 1422
cc80f89e 1423 if (n>0) for (Int_t i =0; i<n; i++){
1424 Int_t *index = fTPCParam->GetResBin(i);
73042f01 1425 Int_t pad=index[1]+centralPad; //in digit coordinates central pad has coordinate 0
cc80f89e 1426 if ( ( pad<(fTPCParam->GetNPads(fCurrentIndex[1],fCurrentIndex[3]))) && (pad>0)) {
1427 Int_t time=index[2];
1428 Float_t weight = fTPCParam->GetResWeight(i); //we normalise response to ADC channel
1429 weight *= eltoadcfac;
1430
1431 if (m1!=0) signal(pad,time)+=weight;
1432 total(pad,time)+=weight;
73042f01 1433 indexRange[0]=TMath::Min(indexRange[0],pad);
1434 indexRange[1]=TMath::Max(indexRange[1],pad);
1435 indexRange[2]=TMath::Min(indexRange[2],time);
1436 indexRange[3]=TMath::Max(indexRange[3],time);
cc80f89e 1437 }
1438 }
8c555625 1439 } // end of loop over electrons
cc80f89e 1440
8c555625 1441 return label; // returns track label when finished
1442}
1443
1444//_____________________________________________________________________________
73042f01 1445void AliTPC::GetList(Float_t label,Int_t np,TMatrix *m,Int_t *indexRange,
8c555625 1446 Float_t **pList)
1447{
1448 //----------------------------------------------------------------------
1449 // Updates the list of tracks contributing to digits for a given row
1450 //----------------------------------------------------------------------
1451
1452 //-----------------------------------------------------------------
1453 // Origin: Marek Kowalski IFJ, Krakow, Marek.Kowalski@ifj.edu.pl
1454 //-----------------------------------------------------------------
1455
1456 TMatrix &signal = *m;
1457
1458 // lop over nonzero digits
1459
73042f01 1460 for(Int_t it=indexRange[2];it<indexRange[3]+1;it++){
1461 for(Int_t ip=indexRange[0];ip<indexRange[1]+1;ip++){
8c555625 1462
1463
921bf71a 1464 // accept only the contribution larger than 500 electrons (1/2 s_noise)
1465
cc80f89e 1466 if(signal(ip,it)<0.5) continue;
921bf71a 1467
1468
73042f01 1469 Int_t globalIndex = it*np+ip; // globalIndex starts from 0!
8c555625 1470
73042f01 1471 if(!pList[globalIndex]){
8c555625 1472
1473 //
1474 // Create new list (6 elements - 3 signals and 3 labels),
8c555625 1475 //
1476
73042f01 1477 pList[globalIndex] = new Float_t [6];
8c555625 1478
1479 // set list to -1
1480
73042f01 1481 *pList[globalIndex] = -1.;
1482 *(pList[globalIndex]+1) = -1.;
1483 *(pList[globalIndex]+2) = -1.;
1484 *(pList[globalIndex]+3) = -1.;
1485 *(pList[globalIndex]+4) = -1.;
1486 *(pList[globalIndex]+5) = -1.;
8c555625 1487
1488
73042f01 1489 *pList[globalIndex] = label;
1490 *(pList[globalIndex]+3) = signal(ip,it);
8c555625 1491 }
1492 else{
1493
1494 // check the signal magnitude
1495
73042f01 1496 Float_t highest = *(pList[globalIndex]+3);
1497 Float_t middle = *(pList[globalIndex]+4);
1498 Float_t lowest = *(pList[globalIndex]+5);
8c555625 1499
1500 //
1501 // compare the new signal with already existing list
1502 //
1503
1504 if(signal(ip,it)<lowest) continue; // neglect this track
1505
1506 //
1507
1508 if (signal(ip,it)>highest){
73042f01 1509 *(pList[globalIndex]+5) = middle;
1510 *(pList[globalIndex]+4) = highest;
1511 *(pList[globalIndex]+3) = signal(ip,it);
8c555625 1512
73042f01 1513 *(pList[globalIndex]+2) = *(pList[globalIndex]+1);
1514 *(pList[globalIndex]+1) = *pList[globalIndex];
1515 *pList[globalIndex] = label;
8c555625 1516 }
1517 else if (signal(ip,it)>middle){
73042f01 1518 *(pList[globalIndex]+5) = middle;
1519 *(pList[globalIndex]+4) = signal(ip,it);
8c555625 1520
73042f01 1521 *(pList[globalIndex]+2) = *(pList[globalIndex]+1);
1522 *(pList[globalIndex]+1) = label;
8c555625 1523 }
1524 else{
73042f01 1525 *(pList[globalIndex]+5) = signal(ip,it);
1526 *(pList[globalIndex]+2) = label;
8c555625 1527 }
1528 }
1529
1530 } // end of loop over pads
1531 } // end of loop over time bins
1532
1533
1534
8c555625 1535}//end of GetList
1536//___________________________________________________________________
1537void AliTPC::MakeSector(Int_t isec,Int_t nrows,TTree *TH,
1538 Stat_t ntracks,TObjArray **row)
1539{
1540
1541 //-----------------------------------------------------------------
1542 // Prepares the sector digitization, creates the vectors of
1543 // tracks for each row of this sector. The track vector
1544 // contains the track label and the position of electrons.
1545 //-----------------------------------------------------------------
1546
1547 //-----------------------------------------------------------------
1548 // Origin: Marek Kowalski IFJ, Krakow, Marek.Kowalski@ifj.edu.pl
1549 //-----------------------------------------------------------------
1550
cc80f89e 1551 Float_t gasgain = fTPCParam->GetGasGain();
8c555625 1552 Int_t i;
cc80f89e 1553 Float_t xyz[4];
8c555625 1554
1555 AliTPChit *tpcHit; // pointer to a sigle TPC hit
39c8eb58 1556 //MI change
1557 TBranch * branch=0;
1558 if (fHitType&2) branch = TH->GetBranch("TPC2");
1559 else branch = TH->GetBranch("TPC");
1560
8c555625 1561
1562 //----------------------------------------------
1563 // Create TObjArray-s, one for each row,
1564 // each TObjArray will store the TVectors
1565 // of electrons, one TVector per each track.
1566 //----------------------------------------------
1567
f74bb6f5 1568 Int_t *nofElectrons = new Int_t [nrows]; // electron counter for each row
1569 TVector **tracks = new TVector* [nrows]; //pointers to the track vectors
8c555625 1570 for(i=0; i<nrows; i++){
1571 row[i] = new TObjArray;
f74bb6f5 1572 nofElectrons[i]=0;
1573 tracks[i]=0;
8c555625 1574 }
8c555625 1575
37831078 1576
1577
8c555625 1578 //--------------------------------------------------------------------
1579 // Loop over tracks, the "track" contains the full history
1580 //--------------------------------------------------------------------
1581
1582 Int_t previousTrack,currentTrack;
1583 previousTrack = -1; // nothing to store so far!
1584
1585 for(Int_t track=0;track<ntracks;track++){
39c8eb58 1586 Bool_t isInSector=kTRUE;
8c555625 1587 ResetHits();
1588
39c8eb58 1589 if (fHitType&2) {
1590 isInSector=kFALSE;
1591 TBranch * br = TH->GetBranch("fTrackHitsInfo");
1592 br->GetEvent(track);
1593 AliObjectArray * ar = fTrackHits->fTrackHitsInfo;
1594 for (UInt_t j=0;j<ar->GetSize();j++){
1595 if ( ((AliTrackHitsInfo*)ar->At(j))->fVolumeID==isec) isInSector=kTRUE;
1596 }
1597 }
1598 if (!isInSector) continue;
1599 //MI change
1600 branch->GetEntry(track); // get next track
1601
1602 //M.I. changes
8c555625 1603
39c8eb58 1604 tpcHit = (AliTPChit*)FirstHit(-1);
8c555625 1605
1606 //--------------------------------------------------------------
1607 // Loop over hits
1608 //--------------------------------------------------------------
1609
8c555625 1610
39c8eb58 1611 while(tpcHit){
8c555625 1612
1613 Int_t sector=tpcHit->fSector; // sector number
39c8eb58 1614 // if(sector != isec) continue;
1615 if(sector != isec){
1616 tpcHit = (AliTPChit*) NextHit();
1617 continue;
1618 }
8c555625 1619
94de3818 1620 currentTrack = tpcHit->Track(); // track number
39c8eb58 1621
1622
8c555625 1623 if(currentTrack != previousTrack){
1624
1625 // store already filled fTrack
1626
1627 for(i=0;i<nrows;i++){
1628 if(previousTrack != -1){
73042f01 1629 if(nofElectrons[i]>0){
cc80f89e 1630 TVector &v = *tracks[i];
8c555625 1631 v(0) = previousTrack;
73042f01 1632 tracks[i]->ResizeTo(4*nofElectrons[i]+1); // shrink if necessary
cc80f89e 1633 row[i]->Add(tracks[i]);
8c555625 1634 }
1635 else{
cc80f89e 1636 delete tracks[i]; // delete empty TVector
1637 tracks[i]=0;
8c555625 1638 }
1639 }
1640
73042f01 1641 nofElectrons[i]=0;
cc80f89e 1642 tracks[i] = new TVector(481); // TVectors for the next fTrack
8c555625 1643
1644 } // end of loop over rows
1645
1646 previousTrack=currentTrack; // update track label
1647 }
1648
73042f01 1649 Int_t qI = (Int_t) (tpcHit->fQ); // energy loss (number of electrons)
8c555625 1650
1651 //---------------------------------------------------
1652 // Calculate the electron attachment probability
1653 //---------------------------------------------------
1654
cc80f89e 1655
94de3818 1656 Float_t time = 1.e6*(fTPCParam->GetZLength()-TMath::Abs(tpcHit->Z()))
cc80f89e 1657 /fTPCParam->GetDriftV();
8c555625 1658 // in microseconds!
73042f01 1659 Float_t attProb = fTPCParam->GetAttCoef()*
8c555625 1660 fTPCParam->GetOxyCont()*time; // fraction!
1661
1662 //-----------------------------------------------
1663 // Loop over electrons
1664 //-----------------------------------------------
cc80f89e 1665 Int_t index[3];
1666 index[1]=isec;
73042f01 1667 for(Int_t nel=0;nel<qI;nel++){
8c555625 1668 // skip if electron lost due to the attachment
73042f01 1669 if((gRandom->Rndm(0)) < attProb) continue; // electron lost!
94de3818 1670 xyz[0]=tpcHit->X();
1671 xyz[1]=tpcHit->Y();
1705494b 1672 xyz[2]=tpcHit->Z();
1673 //
1674 // protection for the nonphysical avalanche size (10**6 maximum)
1675 //
710dacf5 1676 Double_t rn=TMath::Max(gRandom->Rndm(0),1.93e-22);
1677 xyz[3]= (Float_t) (-gasgain*TMath::Log(rn));
cc80f89e 1678 index[0]=1;
1679
1680 TransportElectron(xyz,index); //MI change -august
73042f01 1681 Int_t rowNumber;
cc80f89e 1682 fTPCParam->GetPadRow(xyz,index); //MI change august
73042f01 1683 rowNumber = index[2];
cc80f89e 1684 //transform position to local digit coordinates
1685 //relative to nearest pad row
73042f01 1686 if ((rowNumber<0)||rowNumber>=fTPCParam->GetNRow(isec)) continue;
1687 nofElectrons[rowNumber]++;
8c555625 1688 //----------------------------------
1689 // Expand vector if necessary
1690 //----------------------------------
73042f01 1691 if(nofElectrons[rowNumber]>120){
1692 Int_t range = tracks[rowNumber]->GetNrows();
1693 if((nofElectrons[rowNumber])>(range-1)/4){
cc80f89e 1694
73042f01 1695 tracks[rowNumber]->ResizeTo(range+400); // Add 100 electrons
fe4da5cc 1696 }
1697 }
1698
73042f01 1699 TVector &v = *tracks[rowNumber];
1700 Int_t idx = 4*nofElectrons[rowNumber]-3;
8c555625 1701
cc80f89e 1702 v(idx)= xyz[0]; // X - pad row coordinate
1703 v(idx+1)=xyz[1]; // Y - pad coordinate (along the pad-row)
1704 v(idx+2)=xyz[2]; // Z - time bin coordinate
1705 v(idx+3)=xyz[3]; // avalanche size
8c555625 1706 } // end of loop over electrons
39c8eb58 1707
1708 tpcHit = (AliTPChit*)NextHit();
8c555625 1709
1710 } // end of loop over hits
1711 } // end of loop over tracks
1712
1713 //
1714 // store remaining track (the last one) if not empty
1715 //
1716
1717 for(i=0;i<nrows;i++){
73042f01 1718 if(nofElectrons[i]>0){
cc80f89e 1719 TVector &v = *tracks[i];
8c555625 1720 v(0) = previousTrack;
73042f01 1721 tracks[i]->ResizeTo(4*nofElectrons[i]+1); // shrink if necessary
cc80f89e 1722 row[i]->Add(tracks[i]);
fe4da5cc 1723 }
1724 else{
cc80f89e 1725 delete tracks[i];
1726 tracks[i]=0;
8c555625 1727 }
1728 }
1729
cc80f89e 1730 delete [] tracks;
73042f01 1731 delete [] nofElectrons;
8c555625 1732
8c555625 1733
cc80f89e 1734} // end of MakeSector
8c555625 1735
fe4da5cc 1736
1737//_____________________________________________________________________________
1738void AliTPC::Init()
1739{
1740 //
1741 // Initialise TPC detector after definition of geometry
1742 //
1743 Int_t i;
1744 //
1745 printf("\n");
1746 for(i=0;i<35;i++) printf("*");
1747 printf(" TPC_INIT ");
1748 for(i=0;i<35;i++) printf("*");
1749 printf("\n");
1750 //
1751 for(i=0;i<80;i++) printf("*");
1752 printf("\n");
1753}
1754
1755//_____________________________________________________________________________
2ab0c725 1756void AliTPC::MakeBranch(Option_t* option, char *file)
fe4da5cc 1757{
1758 //
1759 // Create Tree branches for the TPC.
1760 //
1761 Int_t buffersize = 4000;
1762 char branchname[10];
1763 sprintf(branchname,"%s",GetName());
1764
2ab0c725 1765 AliDetector::MakeBranch(option,file);
fe4da5cc 1766
5cf7bbad 1767 const char *d = strstr(option,"D");
fe4da5cc 1768
73042f01 1769 if (fDigits && gAlice->TreeD() && d) {
2ab0c725 1770 gAlice->MakeBranchInTree(gAlice->TreeD(),
1771 branchname, &fDigits, buffersize, file) ;
fe4da5cc 1772 }
39c8eb58 1773
2ab0c725 1774 if (fHitType&2) MakeBranch2(option,file); // MI change 14.09.2000
fe4da5cc 1775}
1776
1777//_____________________________________________________________________________
1778void AliTPC::ResetDigits()
1779{
1780 //
1781 // Reset number of digits and the digits array for this detector
fe4da5cc 1782 //
1783 fNdigits = 0;
cc80f89e 1784 if (fDigits) fDigits->Clear();
fe4da5cc 1785}
1786
1787//_____________________________________________________________________________
1788void AliTPC::SetSecAL(Int_t sec)
1789{
8c555625 1790 //---------------------------------------------------
fe4da5cc 1791 // Activate/deactivate selection for lower sectors
8c555625 1792 //---------------------------------------------------
1793
1794 //-----------------------------------------------------------------
1795 // Origin: Marek Kowalski IFJ, Krakow, Marek.Kowalski@ifj.edu.pl
1796 //-----------------------------------------------------------------
1797
fe4da5cc 1798 fSecAL = sec;
1799}
1800
1801//_____________________________________________________________________________
1802void AliTPC::SetSecAU(Int_t sec)
1803{
8c555625 1804 //----------------------------------------------------
fe4da5cc 1805 // Activate/deactivate selection for upper sectors
8c555625 1806 //---------------------------------------------------
1807
1808 //-----------------------------------------------------------------
1809 // Origin: Marek Kowalski IFJ, Krakow, Marek.Kowalski@ifj.edu.pl
1810 //-----------------------------------------------------------------
1811
fe4da5cc 1812 fSecAU = sec;
1813}
1814
1815//_____________________________________________________________________________
1816void AliTPC::SetSecLows(Int_t s1,Int_t s2,Int_t s3,Int_t s4,Int_t s5, Int_t s6)
1817{
8c555625 1818 //----------------------------------------
fe4da5cc 1819 // Select active lower sectors
8c555625 1820 //----------------------------------------
1821
1822 //-----------------------------------------------------------------
1823 // Origin: Marek Kowalski IFJ, Krakow, Marek.Kowalski@ifj.edu.pl
1824 //-----------------------------------------------------------------
1825
fe4da5cc 1826 fSecLows[0] = s1;
1827 fSecLows[1] = s2;
1828 fSecLows[2] = s3;
1829 fSecLows[3] = s4;
1830 fSecLows[4] = s5;
1831 fSecLows[5] = s6;
1832}
1833
1834//_____________________________________________________________________________
1835void AliTPC::SetSecUps(Int_t s1,Int_t s2,Int_t s3,Int_t s4,Int_t s5, Int_t s6,
1836 Int_t s7, Int_t s8 ,Int_t s9 ,Int_t s10,
1837 Int_t s11 , Int_t s12)
1838{
8c555625 1839 //--------------------------------
fe4da5cc 1840 // Select active upper sectors
8c555625 1841 //--------------------------------
1842
1843 //-----------------------------------------------------------------
1844 // Origin: Marek Kowalski IFJ, Krakow, Marek.Kowalski@ifj.edu.pl
1845 //-----------------------------------------------------------------
1846
fe4da5cc 1847 fSecUps[0] = s1;
1848 fSecUps[1] = s2;
1849 fSecUps[2] = s3;
1850 fSecUps[3] = s4;
1851 fSecUps[4] = s5;
1852 fSecUps[5] = s6;
1853 fSecUps[6] = s7;
1854 fSecUps[7] = s8;
1855 fSecUps[8] = s9;
1856 fSecUps[9] = s10;
1857 fSecUps[10] = s11;
1858 fSecUps[11] = s12;
1859}
1860
1861//_____________________________________________________________________________
1862void AliTPC::SetSens(Int_t sens)
1863{
8c555625 1864
1865 //-------------------------------------------------------------
1866 // Activates/deactivates the sensitive strips at the center of
1867 // the pad row -- this is for the space-point resolution calculations
1868 //-------------------------------------------------------------
1869
1870 //-----------------------------------------------------------------
1871 // Origin: Marek Kowalski IFJ, Krakow, Marek.Kowalski@ifj.edu.pl
1872 //-----------------------------------------------------------------
1873
fe4da5cc 1874 fSens = sens;
1875}
2b06d5c3 1876
4b0fdcad 1877
73042f01 1878void AliTPC::SetSide(Float_t side=0.)
4b0fdcad 1879{
73042f01 1880 // choice of the TPC side
1881
4b0fdcad 1882 fSide = side;
1883
1884}
1283eee5 1885//____________________________________________________________________________
1886void AliTPC::SetGasMixt(Int_t nc,Int_t c1,Int_t c2,Int_t c3,Float_t p1,
1887 Float_t p2,Float_t p3)
1888{
fe4da5cc 1889
73042f01 1890 // gax mixture definition
1891
1283eee5 1892 fNoComp = nc;
1893
1894 fMixtComp[0]=c1;
1895 fMixtComp[1]=c2;
1896 fMixtComp[2]=c3;
1897
1898 fMixtProp[0]=p1;
1899 fMixtProp[1]=p2;
1900 fMixtProp[2]=p3;
1901
1902
cc80f89e 1903}
1904//_____________________________________________________________________________
1905
1906void AliTPC::TransportElectron(Float_t *xyz, Int_t *index)
1907{
1908 //
1909 // electron transport taking into account:
1910 // 1. diffusion,
1911 // 2.ExB at the wires
1912 // 3. nonisochronity
1913 //
1914 // xyz and index must be already transformed to system 1
1915 //
1916
1917 fTPCParam->Transform1to2(xyz,index);
1918
1919 //add diffusion
1920 Float_t driftl=xyz[2];
1921 if(driftl<0.01) driftl=0.01;
1922 driftl=TMath::Sqrt(driftl);
73042f01 1923 Float_t sigT = driftl*(fTPCParam->GetDiffT());
1924 Float_t sigL = driftl*(fTPCParam->GetDiffL());
1925 xyz[0]=gRandom->Gaus(xyz[0],sigT);
1926 xyz[1]=gRandom->Gaus(xyz[1],sigT);
1927 xyz[2]=gRandom->Gaus(xyz[2],sigL);
cc80f89e 1928
1929 // ExB
1930
1931 if (fTPCParam->GetMWPCReadout()==kTRUE){
1932 Float_t x1=xyz[0];
1933 fTPCParam->Transform2to2NearestWire(xyz,index);
1934 Float_t dx=xyz[0]-x1;
1935 xyz[1]+=dx*(fTPCParam->GetOmegaTau());
1936 }
1937 //add nonisochronity (not implemented yet)
1938
1283eee5 1939}
fe4da5cc 1940
fe4da5cc 1941ClassImp(AliTPCdigit)
1942
1943//_____________________________________________________________________________
1944AliTPCdigit::AliTPCdigit(Int_t *tracks, Int_t *digits):
1945 AliDigit(tracks)
1946{
1947 //
1948 // Creates a TPC digit object
1949 //
1950 fSector = digits[0];
1951 fPadRow = digits[1];
1952 fPad = digits[2];
1953 fTime = digits[3];
1954 fSignal = digits[4];
1955}
1956
1957
1958ClassImp(AliTPChit)
1959
1960//_____________________________________________________________________________
1961AliTPChit::AliTPChit(Int_t shunt, Int_t track, Int_t *vol, Float_t *hits):
1962AliHit(shunt,track)
1963{
1964 //
1965 // Creates a TPC hit object
1966 //
1967 fSector = vol[0];
1968 fPadRow = vol[1];
1969 fX = hits[0];
1970 fY = hits[1];
1971 fZ = hits[2];
1972 fQ = hits[3];
1973}
1974
8c555625 1975
39c8eb58 1976//________________________________________________________________________
1977// Additional code because of the AliTPCTrackHits
1978
2ab0c725 1979void AliTPC::MakeBranch2(Option_t *option,char *file)
39c8eb58 1980{
1981 //
1982 // Create a new branch in the current Root Tree
1983 // The branch of fHits is automatically split
1984 // MI change 14.09.2000
1985 if (fHitType&2==0) return;
1986 char branchname[10];
1987 sprintf(branchname,"%s2",GetName());
1988 //
1989 // Get the pointer to the header
5cf7bbad 1990 const char *cH = strstr(option,"H");
39c8eb58 1991 //
1992 if (fTrackHits && gAlice->TreeH() && cH) {
39c8eb58 1993 AliObjectBranch * branch = new AliObjectBranch(branchname,"AliTPCTrackHits",&fTrackHits,
1994 gAlice->TreeH(),fBufferSize,1);
1995 gAlice->TreeH()->GetListOfBranches()->Add(branch);
1996 printf("* AliDetector::MakeBranch * Making Branch %s for trackhits\n",branchname);
2ab0c725 1997 if (file) {
1998 TBranch *b = gAlice->TreeH()->GetBranch(branchname);
1999 TDirectory *wd = gDirectory;
2000 b->SetFile(file);
2001 TIter next( b->GetListOfBranches());
2002 while ((b=(TBranch*)next())) {
2003 b->SetFile(file);
2004 }
2005 wd->cd();
2006 cout << "Diverting branch " << branchname << " to file " << file << endl;
2007 }
39c8eb58 2008 }
2009}
2010
2011void AliTPC::SetTreeAddress()
2012{
2013 if (fHitType&1) AliDetector::SetTreeAddress();
2014 if (fHitType&2) SetTreeAddress2();
2015}
2016
2017void AliTPC::SetTreeAddress2()
2018{
2019 //
2020 // Set branch address for the TrackHits Tree
2021 //
2022 TBranch *branch;
2023 char branchname[20];
2024 sprintf(branchname,"%s2",GetName());
2025 //
2026 // Branch address for hit tree
2027 TTree *treeH = gAlice->TreeH();
2028 if (treeH) {
2029 branch = treeH->GetBranch(branchname);
2030 if (branch) branch->SetAddress(&fTrackHits);
2031 }
2032}
2033
2034void AliTPC::FinishPrimary()
2035{
2036 if (fTrackHits) fTrackHits->FlushHitStack();
2037}
2038
2039
2040void AliTPC::AddHit2(Int_t track, Int_t *vol, Float_t *hits)
2041{
2042 //
2043 // add hit to the list
39c8eb58 2044 Int_t rtrack;
2045 if (fIshunt) {
2046 int primary = gAlice->GetPrimary(track);
2ab0c725 2047 gAlice->Particle(primary)->SetBit(kKeepBit);
39c8eb58 2048 rtrack=primary;
2049 } else {
2050 rtrack=track;
2051 gAlice->FlagTrack(track);
2052 }
2053 //AliTPChit *hit = (AliTPChit*)fHits->UncheckedAt(fNhits-1);
2054 //if (hit->fTrack!=rtrack)
2055 // cout<<"bad track number\n";
2056 if (fTrackHits)
2057 fTrackHits->AddHitKartez(vol[0],rtrack, hits[0],
2058 hits[1],hits[2],(Int_t)hits[3]);
2059}
2060
2061void AliTPC::ResetHits()
2062{
2063 if (fHitType&1) AliDetector::ResetHits();
2064 if (fHitType&2) ResetHits2();
2065}
2066
2067void AliTPC::ResetHits2()
2068{
2069 //
2070 //reset hits
2071 if (fTrackHits) fTrackHits->Clear();
2072}
2073
2074AliHit* AliTPC::FirstHit(Int_t track)
2075{
2076 if (fHitType&2) return FirstHit2(track);
2077 return AliDetector::FirstHit(track);
2078}
2079AliHit* AliTPC::NextHit()
2080{
2081 if (fHitType&2) return NextHit2();
2082 return AliDetector::NextHit();
2083}
2084
2085AliHit* AliTPC::FirstHit2(Int_t track)
2086{
2087 //
2088 // Initialise the hit iterator
2089 // Return the address of the first hit for track
2090 // If track>=0 the track is read from disk
2091 // while if track<0 the first hit of the current
2092 // track is returned
2093 //
2094 if(track>=0) {
2095 gAlice->ResetHits();
2096 gAlice->TreeH()->GetEvent(track);
2097 }
2098 //
2099 if (fTrackHits) {
2100 fTrackHits->First();
2101 return fTrackHits->GetHit();
2102 }
2103 else return 0;
2104}
2105
2106AliHit* AliTPC::NextHit2()
2107{
2108 //
2109 //Return the next hit for the current track
2110
2111 if (fTrackHits) {
2112 fTrackHits->Next();
2113 return fTrackHits->GetHit();
2114 }
2115 else
2116 return 0;
2117}
2118
2119void AliTPC::LoadPoints(Int_t)
2120{
2121 //
2122 Int_t a = 0;
f2e8b846 2123 /* if(fHitType==1) return AliDetector::LoadPoints(a);
39c8eb58 2124 LoadPoints2(a);
f2e8b846 2125 */
2126 if(fHitType==1) AliDetector::LoadPoints(a);
2127 else LoadPoints2(a);
2128
39c8eb58 2129 // LoadPoints3(a);
2130
2131}
2132
2133
2134void AliTPC::RemapTrackHitIDs(Int_t *map)
2135{
2136 if (!fTrackHits) return;
2137 AliObjectArray * arr = fTrackHits->fTrackHitsInfo;
2138 for (UInt_t i=0;i<arr->GetSize();i++){
2139 AliTrackHitsInfo * info = (AliTrackHitsInfo *)(arr->At(i));
2140 info->fTrackID = map[info->fTrackID];
2141 }
2142
2143}
2144
2145
2146//_____________________________________________________________________________
2147void AliTPC::LoadPoints2(Int_t)
2148{
2149 //
2150 // Store x, y, z of all hits in memory
2151 //
2152 if (fTrackHits == 0) return;
2153 //
2154 Int_t nhits = fTrackHits->GetEntriesFast();
2155 if (nhits == 0) return;
2156 Int_t tracks = gAlice->GetNtrack();
2157 if (fPoints == 0) fPoints = new TObjArray(tracks);
2158 AliHit *ahit;
2159 //
2160 Int_t *ntrk=new Int_t[tracks];
2161 Int_t *limi=new Int_t[tracks];
2162 Float_t **coor=new Float_t*[tracks];
2163 for(Int_t i=0;i<tracks;i++) {
2164 ntrk[i]=0;
2165 coor[i]=0;
2166 limi[i]=0;
2167 }
2168 //
2169 AliPoints *points = 0;
2170 Float_t *fp=0;
2171 Int_t trk;
2172 Int_t chunk=nhits/4+1;
2173 //
2174 // Loop over all the hits and store their position
2175 //
2176 ahit = FirstHit2(-1);
2177 //for (Int_t hit=0;hit<nhits;hit++) {
2178 while (ahit){
2179 // ahit = (AliHit*)fHits->UncheckedAt(hit);
2180 trk=ahit->GetTrack();
2181 if(ntrk[trk]==limi[trk]) {
2182 //
2183 // Initialise a new track
2184 fp=new Float_t[3*(limi[trk]+chunk)];
2185 if(coor[trk]) {
2186 memcpy(fp,coor[trk],sizeof(Float_t)*3*limi[trk]);
2187 delete [] coor[trk];
2188 }
2189 limi[trk]+=chunk;
2190 coor[trk] = fp;
2191 } else {
2192 fp = coor[trk];
2193 }
2194 fp[3*ntrk[trk] ] = ahit->X();
2195 fp[3*ntrk[trk]+1] = ahit->Y();
2196 fp[3*ntrk[trk]+2] = ahit->Z();
2197 ntrk[trk]++;
2198 ahit = NextHit2();
2199 }
2200 //
2201 for(trk=0; trk<tracks; ++trk) {
2202 if(ntrk[trk]) {
2203 points = new AliPoints();
2204 points->SetMarkerColor(GetMarkerColor());
2205 points->SetMarkerSize(GetMarkerSize());
2206 points->SetDetector(this);
2207 points->SetParticle(trk);
2208 points->SetPolyMarker(ntrk[trk],coor[trk],GetMarkerStyle());
2209 fPoints->AddAt(points,trk);
2210 delete [] coor[trk];
2211 coor[trk]=0;
2212 }
2213 }
2214 delete [] coor;
2215 delete [] ntrk;
2216 delete [] limi;
2217}
2218
2219
2220//_____________________________________________________________________________
2221void AliTPC::LoadPoints3(Int_t)
2222{
2223 //
2224 // Store x, y, z of all hits in memory
2225 // - only intersection point with pad row
2226 if (fTrackHits == 0) return;
2227 //
2228 Int_t nhits = fTrackHits->GetEntriesFast();
2229 if (nhits == 0) return;
2230 Int_t tracks = gAlice->GetNtrack();
2231 if (fPoints == 0) fPoints = new TObjArray(2*tracks);
2232 fPoints->Expand(2*tracks);
2233 AliHit *ahit;
2234 //
2235 Int_t *ntrk=new Int_t[tracks];
2236 Int_t *limi=new Int_t[tracks];
2237 Float_t **coor=new Float_t*[tracks];
2238 for(Int_t i=0;i<tracks;i++) {
2239 ntrk[i]=0;
2240 coor[i]=0;
2241 limi[i]=0;
2242 }
2243 //
2244 AliPoints *points = 0;
2245 Float_t *fp=0;
2246 Int_t trk;
2247 Int_t chunk=nhits/4+1;
2248 //
2249 // Loop over all the hits and store their position
2250 //
2251 ahit = FirstHit2(-1);
2252 //for (Int_t hit=0;hit<nhits;hit++) {
2253
2254 Int_t lastrow = -1;
2255 while (ahit){
2256 // ahit = (AliHit*)fHits->UncheckedAt(hit);
2257 trk=ahit->GetTrack();
2258 Float_t x[3]={ahit->X(),ahit->Y(),ahit->Z()};
2259 Int_t index[3]={1,((AliTPChit*)ahit)->fSector,0};
2260 Int_t currentrow = fTPCParam->GetPadRow(x,index) ;
2261 if (currentrow!=lastrow){
2262 lastrow = currentrow;
2263 //later calculate intersection point
2264 if(ntrk[trk]==limi[trk]) {
2265 //
2266 // Initialise a new track
2267 fp=new Float_t[3*(limi[trk]+chunk)];
2268 if(coor[trk]) {
2269 memcpy(fp,coor[trk],sizeof(Float_t)*3*limi[trk]);
2270 delete [] coor[trk];
2271 }
2272 limi[trk]+=chunk;
2273 coor[trk] = fp;
2274 } else {
2275 fp = coor[trk];
2276 }
2277 fp[3*ntrk[trk] ] = ahit->X();
2278 fp[3*ntrk[trk]+1] = ahit->Y();
2279 fp[3*ntrk[trk]+2] = ahit->Z();
2280 ntrk[trk]++;
2281 }
2282 ahit = NextHit2();
2283 }
2284
2285 //
2286 for(trk=0; trk<tracks; ++trk) {
2287 if(ntrk[trk]) {
2288 points = new AliPoints();
2289 points->SetMarkerColor(GetMarkerColor()+1);
2290 points->SetMarkerStyle(5);
2291 points->SetMarkerSize(0.2);
2292 points->SetDetector(this);
2293 points->SetParticle(trk);
2294 // points->SetPolyMarker(ntrk[trk],coor[trk],GetMarkerStyle()20);
2295 points->SetPolyMarker(ntrk[trk],coor[trk],30);
2296 fPoints->AddAt(points,tracks+trk);
2297 delete [] coor[trk];
2298 coor[trk]=0;
2299 }
2300 }
2301 delete [] coor;
2302 delete [] ntrk;
2303 delete [] limi;
2304}
2305
2306
2307
2308void AliTPC::FindTrackHitsIntersection(TClonesArray * arr)
2309{
2310
2311 //
2312 //fill clones array with intersection of current point with the
2313 //middle of the row
2314 Int_t sector;
2315 Int_t ipart;
2316
2317 const Int_t kcmaxhits=30000;
2318 TVector * xxxx = new TVector(kcmaxhits*4);
2319 TVector & xxx = *xxxx;
2320 Int_t maxhits = kcmaxhits;
2321
2322 //
2323 AliTPChit * tpcHit=0;
2324 tpcHit = (AliTPChit*)FirstHit2(-1);
2325 Int_t currentIndex=0;
2326 Int_t lastrow=-1; //last writen row
2327
2328 while (tpcHit){
2329 if (tpcHit==0) continue;
2330 sector=tpcHit->fSector; // sector number
2331 ipart=tpcHit->Track();
2332
2333 //find row number
2334
2335 Float_t x[3]={tpcHit->X(),tpcHit->Y(),tpcHit->Z()};
2336 Int_t index[3]={1,sector,0};
2337 Int_t currentrow = fTPCParam->GetPadRow(x,index) ;
2338 if (currentrow<0) continue;
2339 if (lastrow<0) lastrow=currentrow;
2340 if (currentrow==lastrow){
2341 if ( currentIndex>=maxhits){
2342 maxhits+=kcmaxhits;
2343 xxx.ResizeTo(4*maxhits);
2344 }
2345 xxx(currentIndex*4)=x[0];
2346 xxx(currentIndex*4+1)=x[1];
2347 xxx(currentIndex*4+2)=x[2];
2348 xxx(currentIndex*4+3)=tpcHit->fQ;
2349 currentIndex++;
2350 }
2351 else
2352 if (currentIndex>2){
2353 Float_t sumx=0;
2354 Float_t sumx2=0;
2355 Float_t sumx3=0;
2356 Float_t sumx4=0;
2357 Float_t sumy=0;
2358 Float_t sumxy=0;
2359 Float_t sumx2y=0;
2360 Float_t sumz=0;
2361 Float_t sumxz=0;
2362 Float_t sumx2z=0;
2363 Float_t sumq=0;
2364 for (Int_t index=0;index<currentIndex;index++){
2365 Float_t x,x2,x3,x4;
2366 x=x2=x3=x4=xxx(index*4);
2367 x2*=x;
2368 x3*=x2;
2369 x4*=x3;
2370 sumx+=x;
2371 sumx2+=x2;
2372 sumx3+=x3;
2373 sumx4+=x4;
2374 sumy+=xxx(index*4+1);
2375 sumxy+=xxx(index*4+1)*x;
2376 sumx2y+=xxx(index*4+1)*x2;
2377 sumz+=xxx(index*4+2);
2378 sumxz+=xxx(index*4+2)*x;
2379 sumx2z+=xxx(index*4+2)*x2;
2380 sumq+=xxx(index*4+3);
2381 }
2382 Float_t centralPad = (fTPCParam->GetNPads(sector,lastrow)-1)/2;
2383 Float_t det=currentIndex*(sumx2*sumx4-sumx3*sumx3)-sumx*(sumx*sumx4-sumx2*sumx3)+
2384 sumx2*(sumx*sumx3-sumx2*sumx2);
2385
2386 Float_t detay=sumy*(sumx2*sumx4-sumx3*sumx3)-sumx*(sumxy*sumx4-sumx2y*sumx3)+
2387 sumx2*(sumxy*sumx3-sumx2y*sumx2);
2388 Float_t detaz=sumz*(sumx2*sumx4-sumx3*sumx3)-sumx*(sumxz*sumx4-sumx2z*sumx3)+
2389 sumx2*(sumxz*sumx3-sumx2z*sumx2);
2390
2391 Float_t detby=currentIndex*(sumxy*sumx4-sumx2y*sumx3)-sumy*(sumx*sumx4-sumx2*sumx3)+
2392 sumx2*(sumx*sumx2y-sumx2*sumxy);
2393 Float_t detbz=currentIndex*(sumxz*sumx4-sumx2z*sumx3)-sumz*(sumx*sumx4-sumx2*sumx3)+
2394 sumx2*(sumx*sumx2z-sumx2*sumxz);
2395
2396 Float_t y=detay/det+centralPad;
2397 Float_t z=detaz/det;
2398 Float_t by=detby/det; //y angle
2399 Float_t bz=detbz/det; //z angle
2400 sumy/=Float_t(currentIndex);
2401 sumz/=Float_t(currentIndex);
2402
2403 AliComplexCluster cl;
2404 cl.fX=z;
2405 cl.fY=y;
2406 cl.fQ=sumq;
2407 cl.fSigmaX2=bz;
2408 cl.fSigmaY2=by;
2409 cl.fTracks[0]=ipart;
2410
2411 AliTPCClustersRow * row = (fClustersArray->GetRow(sector,lastrow));
2412 if (row!=0) row->InsertCluster(&cl);
2413 currentIndex=0;
2414 lastrow=currentrow;
2415 } //end of calculating cluster for given row
2416
2417 } // end of loop over hits
2418 xxxx->Delete();
2419
2420
2421
2422}