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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$Log$
5a28a08f 18Revision 1.32 2001/03/12 17:47:36 hristov
19Changes needed on Sun with CC 5.0
20
5cf7bbad 21Revision 1.31 2001/03/12 08:21:50 kowal2
22Corrected C++ bug in the material definitions
23
9a3667bd 24Revision 1.30 2001/03/01 17:34:47 kowal2
25Correction due to the accuracy problem
26
710dacf5 27Revision 1.29 2001/02/28 16:34:40 kowal2
28Protection against nonphysical values of the avalanche size,
2910**6 is the maximum
30
1705494b 31Revision 1.28 2001/01/26 19:57:19 hristov
32Major upgrade of AliRoot code
33
2ab0c725 34Revision 1.27 2001/01/13 17:29:33 kowal2
35Sun compiler correction
36
f2e8b846 37Revision 1.26 2001/01/10 07:59:43 kowal2
38Corrections to load points from the noncompressed hits.
39
53048f2e 40Revision 1.25 2000/11/02 07:25:31 kowal2
41Changes due to the new hit structure.
42Memory leak removed.
43
39c8eb58 44Revision 1.24 2000/10/05 16:06:09 kowal2
45Forward declarations. Changes due to a new class AliComplexCluster.
46
2b06d5c3 47Revision 1.23 2000/10/02 21:28:18 fca
48Removal of useless dependecies via forward declarations
49
94de3818 50Revision 1.22 2000/07/10 20:57:39 hristov
51Update of TPC code and macros by M.Kowalski
52
73042f01 53Revision 1.19.2.4 2000/06/26 07:39:42 kowal2
54Changes to obey the coding rules
55
56Revision 1.19.2.3 2000/06/25 08:38:41 kowal2
57Splitted from AliTPCtracking
58
59Revision 1.19.2.2 2000/06/16 12:59:28 kowal2
60Changed parameter settings
61
62Revision 1.19.2.1 2000/06/09 07:15:07 kowal2
63
64Defaults loaded automatically (hard-wired)
65Optional parameters can be set via macro called in the constructor
66
67Revision 1.19 2000/04/18 19:00:59 fca
68Small bug fixes to TPC files
69
4d68a14a 70Revision 1.18 2000/04/17 09:37:33 kowal2
71removed obsolete AliTPCDigitsDisplay.C
72
cc80f89e 73Revision 1.17.2.2 2000/04/10 08:15:12 kowal2
74
75New, experimental data structure from M. Ivanov
76New tracking algorithm
77Different pad geometry for different sectors
78Digitization rewritten
79
80Revision 1.17.2.1 2000/04/10 07:56:53 kowal2
81Not used anymore - removed
82
83Revision 1.17 2000/01/19 17:17:30 fca
84Introducing a list of lists of hits -- more hits allowed for detector now
85
1cedd08a 86Revision 1.16 1999/11/05 09:29:23 fca
87Accept only signals > 0
88
921bf71a 89Revision 1.15 1999/10/08 06:26:53 fca
90Removed ClustersIndex - not used anymore
91
e674b993 92Revision 1.14 1999/09/29 09:24:33 fca
93Introduction of the Copyright and cvs Log
94
4c039060 95*/
96
fe4da5cc 97///////////////////////////////////////////////////////////////////////////////
98// //
99// Time Projection Chamber //
100// This class contains the basic functions for the Time Projection Chamber //
101// detector. Functions specific to one particular geometry are //
102// contained in the derived classes //
103// //
104//Begin_Html
105/*
1439f98e 106<img src="picts/AliTPCClass.gif">
fe4da5cc 107*/
108//End_Html
109// //
8c555625 110// //
fe4da5cc 111///////////////////////////////////////////////////////////////////////////////
112
73042f01 113//
114
fe4da5cc 115#include <TMath.h>
116#include <TRandom.h>
117#include <TVector.h>
8c555625 118#include <TMatrix.h>
fe4da5cc 119#include <TGeometry.h>
120#include <TNode.h>
121#include <TTUBS.h>
122#include <TObjectTable.h>
1578254f 123#include "TParticle.h"
fe4da5cc 124#include "AliTPC.h"
73042f01 125#include <TFile.h>
fe4da5cc 126#include "AliRun.h"
127#include <iostream.h>
2ab0c725 128#include <stdlib.h>
fe4da5cc 129#include <fstream.h>
130#include "AliMC.h"
94de3818 131#include "AliMagF.h"
fe4da5cc 132
cc80f89e 133
73042f01 134#include "AliTPCParamSR.h"
8c555625 135#include "AliTPCPRF2D.h"
136#include "AliTPCRF1D.h"
cc80f89e 137#include "AliDigits.h"
138#include "AliSimDigits.h"
39c8eb58 139#include "AliTPCTrackHits.h"
140#include "AliPoints.h"
141#include "AliArrayBranch.h"
142
cc80f89e 143
144#include "AliTPCDigitsArray.h"
2b06d5c3 145#include "AliComplexCluster.h"
cc80f89e 146#include "AliClusters.h"
147#include "AliTPCClustersRow.h"
148#include "AliTPCClustersArray.h"
8c555625 149
73042f01 150#include "AliTPCcluster.h"
151#include "AliTPCclusterer.h"
152#include "AliTPCtracker.h"
8c555625 153
73042f01 154#include <TInterpreter.h>
2b06d5c3 155#include <TTree.h>
1283eee5 156
39c8eb58 157
158
fe4da5cc 159ClassImp(AliTPC)
160
161//_____________________________________________________________________________
162AliTPC::AliTPC()
163{
164 //
165 // Default constructor
166 //
167 fIshunt = 0;
fe4da5cc 168 fHits = 0;
169 fDigits = 0;
fe4da5cc 170 fNsectors = 0;
cc80f89e 171 //MI changes
172 fDigitsArray = 0;
173 fClustersArray = 0;
73042f01 174 fTPCParam=0;
39c8eb58 175 fTrackHits = 0;
176 fHitType = 2;
177 fTPCParam = 0;
fe4da5cc 178}
179
180//_____________________________________________________________________________
181AliTPC::AliTPC(const char *name, const char *title)
182 : AliDetector(name,title)
183{
184 //
185 // Standard constructor
186 //
187
188 //
189 // Initialise arrays of hits and digits
190 fHits = new TClonesArray("AliTPChit", 176);
4d68a14a 191 gAlice->AddHitList(fHits);
cc80f89e 192 //MI change
193 fDigitsArray = 0;
194 fClustersArray= 0;
fe4da5cc 195 //
39c8eb58 196 fTrackHits = new AliTPCTrackHits; //MI - 13.09.2000
197 fTrackHits->SetHitPrecision(0.002);
198 fTrackHits->SetStepPrecision(0.003);
199 fTrackHits->SetMaxDistance(100);
200
201 fHitType = 2;
202 //
fe4da5cc 203 // Initialise counters
cc80f89e 204 fNsectors = 0;
cc80f89e 205
fe4da5cc 206 //
207 fIshunt = 0;
208 //
209 // Initialise color attributes
210 SetMarkerColor(kYellow);
73042f01 211
212 //
213 // Set TPC parameters
214 //
215
216 if (!strcmp(title,"Default")) {
217 fTPCParam = new AliTPCParamSR;
218 } else {
219 cerr<<"AliTPC warning: in Config.C you must set non-default parameters\n";
220 fTPCParam=0;
221 }
222
fe4da5cc 223}
224
225//_____________________________________________________________________________
226AliTPC::~AliTPC()
227{
228 //
229 // TPC destructor
230 //
73042f01 231
fe4da5cc 232 fIshunt = 0;
233 delete fHits;
234 delete fDigits;
73042f01 235 delete fTPCParam;
39c8eb58 236 delete fTrackHits; //MI 15.09.2000
fe4da5cc 237}
238
fe4da5cc 239//_____________________________________________________________________________
240void AliTPC::AddHit(Int_t track, Int_t *vol, Float_t *hits)
241{
242 //
243 // Add a hit to the list
244 //
39c8eb58 245 // TClonesArray &lhits = *fHits;
246 // new(lhits[fNhits++]) AliTPChit(fIshunt,track,vol,hits);
247 if (fHitType&1){
248 TClonesArray &lhits = *fHits;
249 new(lhits[fNhits++]) AliTPChit(fIshunt,track,vol,hits);
250 }
251 if (fHitType&2)
252 AddHit2(track,vol,hits);
fe4da5cc 253}
254
fe4da5cc 255//_____________________________________________________________________________
256void AliTPC::BuildGeometry()
257{
cc80f89e 258
fe4da5cc 259 //
260 // Build TPC ROOT TNode geometry for the event display
261 //
73042f01 262 TNode *nNode, *nTop;
fe4da5cc 263 TTUBS *tubs;
264 Int_t i;
265 const int kColorTPC=19;
1283eee5 266 char name[5], title[25];
fe4da5cc 267 const Double_t kDegrad=TMath::Pi()/180;
1283eee5 268 const Double_t kRaddeg=180./TMath::Pi();
269
1283eee5 270
73042f01 271 Float_t innerOpenAngle = fTPCParam->GetInnerAngle();
272 Float_t outerOpenAngle = fTPCParam->GetOuterAngle();
1283eee5 273
73042f01 274 Float_t innerAngleShift = fTPCParam->GetInnerAngleShift();
275 Float_t outerAngleShift = fTPCParam->GetOuterAngleShift();
1283eee5 276
277 Int_t nLo = fTPCParam->GetNInnerSector()/2;
278 Int_t nHi = fTPCParam->GetNOuterSector()/2;
279
73042f01 280 const Double_t kloAng = (Double_t)TMath::Nint(innerOpenAngle*kRaddeg);
281 const Double_t khiAng = (Double_t)TMath::Nint(outerOpenAngle*kRaddeg);
282 const Double_t kloAngSh = (Double_t)TMath::Nint(innerAngleShift*kRaddeg);
283 const Double_t khiAngSh = (Double_t)TMath::Nint(outerAngleShift*kRaddeg);
1283eee5 284
285
73042f01 286 const Double_t kloCorr = 1/TMath::Cos(0.5*kloAng*kDegrad);
287 const Double_t khiCorr = 1/TMath::Cos(0.5*khiAng*kDegrad);
1283eee5 288
289 Double_t rl,ru;
290
291
fe4da5cc 292 //
293 // Get ALICE top node
fe4da5cc 294 //
1283eee5 295
73042f01 296 nTop=gAlice->GetGeometry()->GetNode("alice");
1283eee5 297
298 // inner sectors
299
cc80f89e 300 rl = fTPCParam->GetInnerRadiusLow();
301 ru = fTPCParam->GetInnerRadiusUp();
1283eee5 302
303
fe4da5cc 304 for(i=0;i<nLo;i++) {
305 sprintf(name,"LS%2.2d",i);
1283eee5 306 name[4]='\0';
307 sprintf(title,"TPC low sector %3d",i);
308 title[24]='\0';
309
73042f01 310 tubs = new TTUBS(name,title,"void",rl*kloCorr,ru*kloCorr,250.,
311 kloAng*(i-0.5)+kloAngSh,kloAng*(i+0.5)+kloAngSh);
fe4da5cc 312 tubs->SetNumberOfDivisions(1);
73042f01 313 nTop->cd();
314 nNode = new TNode(name,title,name,0,0,0,"");
315 nNode->SetLineColor(kColorTPC);
316 fNodes->Add(nNode);
fe4da5cc 317 }
1283eee5 318
fe4da5cc 319 // Outer sectors
1283eee5 320
cc80f89e 321 rl = fTPCParam->GetOuterRadiusLow();
322 ru = fTPCParam->GetOuterRadiusUp();
1283eee5 323
fe4da5cc 324 for(i=0;i<nHi;i++) {
325 sprintf(name,"US%2.2d",i);
1283eee5 326 name[4]='\0';
fe4da5cc 327 sprintf(title,"TPC upper sector %d",i);
1283eee5 328 title[24]='\0';
73042f01 329 tubs = new TTUBS(name,title,"void",rl*khiCorr,ru*khiCorr,250,
330 khiAng*(i-0.5)+khiAngSh,khiAng*(i+0.5)+khiAngSh);
fe4da5cc 331 tubs->SetNumberOfDivisions(1);
73042f01 332 nTop->cd();
333 nNode = new TNode(name,title,name,0,0,0,"");
334 nNode->SetLineColor(kColorTPC);
335 fNodes->Add(nNode);
fe4da5cc 336 }
cc80f89e 337
73042f01 338}
1283eee5 339
fe4da5cc 340//_____________________________________________________________________________
341Int_t AliTPC::DistancetoPrimitive(Int_t , Int_t )
342{
343 //
344 // Calculate distance from TPC to mouse on the display
345 // Dummy procedure
346 //
347 return 9999;
348}
349
73042f01 350void AliTPC::Clusters2Tracks(TFile *of) {
3c0f9266 351 //-----------------------------------------------------------------
352 // This is a track finder.
3c0f9266 353 //-----------------------------------------------------------------
73042f01 354 AliTPCtracker::Clusters2Tracks(fTPCParam,of);
fe4da5cc 355}
356
357//_____________________________________________________________________________
358void AliTPC::CreateMaterials()
359{
8c555625 360 //-----------------------------------------------
37831078 361 // Create Materials for for TPC simulations
8c555625 362 //-----------------------------------------------
363
364 //-----------------------------------------------------------------
365 // Origin: Marek Kowalski IFJ, Krakow, Marek.Kowalski@ifj.edu.pl
366 //-----------------------------------------------------------------
1283eee5 367
73042f01 368 Int_t iSXFLD=gAlice->Field()->Integ();
369 Float_t sXMGMX=gAlice->Field()->Max();
1283eee5 370
371 Float_t amat[5]; // atomic numbers
372 Float_t zmat[5]; // z
373 Float_t wmat[5]; // proportions
374
375 Float_t density;
37831078 376 Float_t apure[2];
1283eee5 377
1283eee5 378
37831078 379 //***************** Gases *************************
380
381 //-------------------------------------------------
1283eee5 382 // pure gases
37831078 383 //-------------------------------------------------
1283eee5 384
37831078 385 // Neon
1283eee5 386
387
37831078 388 amat[0]= 20.18;
389 zmat[0]= 10.;
1283eee5 390 density = 0.0009;
37831078 391
392 apure[0]=amat[0];
1283eee5 393
37831078 394 AliMaterial(20,"Ne",amat[0],zmat[0],density,999.,999.);
1283eee5 395
37831078 396 // Argon
1283eee5 397
37831078 398 amat[0]= 39.948;
399 zmat[0]= 18.;
400 density = 0.001782;
1283eee5 401
37831078 402 apure[1]=amat[0];
1283eee5 403
37831078 404 AliMaterial(21,"Ar",amat[0],zmat[0],density,999.,999.);
405
1283eee5 406
407 //--------------------------------------------------------------
408 // gases - compounds
409 //--------------------------------------------------------------
410
411 Float_t amol[3];
412
37831078 413 // CO2
1283eee5 414
415 amat[0]=12.011;
416 amat[1]=15.9994;
417
418 zmat[0]=6.;
419 zmat[1]=8.;
420
421 wmat[0]=1.;
422 wmat[1]=2.;
423
424 density=0.001977;
425
426 amol[0] = amat[0]*wmat[0]+amat[1]*wmat[1];
427
428 AliMixture(10,"CO2",amat,zmat,density,-2,wmat);
37831078 429
1283eee5 430 // CF4
431
432 amat[0]=12.011;
433 amat[1]=18.998;
434
435 zmat[0]=6.;
436 zmat[1]=9.;
437
438 wmat[0]=1.;
439 wmat[1]=4.;
440
441 density=0.003034;
442
443 amol[1] = amat[0]*wmat[0]+amat[1]*wmat[1];
444
445 AliMixture(11,"CF4",amat,zmat,density,-2,wmat);
446
37831078 447
1283eee5 448 // CH4
449
450 amat[0]=12.011;
451 amat[1]=1.;
452
453 zmat[0]=6.;
454 zmat[1]=1.;
455
456 wmat[0]=1.;
457 wmat[1]=4.;
458
459 density=0.000717;
460
461 amol[2] = amat[0]*wmat[0]+amat[1]*wmat[1];
462
463 AliMixture(12,"CH4",amat,zmat,density,-2,wmat);
464
465 //----------------------------------------------------------------
466 // gases - mixtures, ID >= 20 pure gases, <= 10 ID < 20 -compounds
467 //----------------------------------------------------------------
37831078 468
469 char namate[21];
1283eee5 470 density = 0.;
471 Float_t am=0;
472 Int_t nc;
37831078 473 Float_t rho,absl,X0,buf[1];
1283eee5 474 Int_t nbuf;
37831078 475 Float_t a,z;
1283eee5 476
477 for(nc = 0;nc<fNoComp;nc++)
478 {
479
480 // retrive material constants
481
37831078 482 gMC->Gfmate((*fIdmate)[fMixtComp[nc]],namate,a,z,rho,X0,absl,buf,nbuf);
1283eee5 483
484 amat[nc] = a;
485 zmat[nc] = z;
486
487 Int_t nnc = (fMixtComp[nc]>=20) ? fMixtComp[nc]%20 : fMixtComp[nc]%10;
488
37831078 489 am += fMixtProp[nc]*((fMixtComp[nc]>=20) ? apure[nnc] : amol[nnc]);
1283eee5 490 density += fMixtProp[nc]*rho; // density of the mixture
491
492 }
493
494 // mixture proportions by weight!
495
496 for(nc = 0;nc<fNoComp;nc++)
497 {
498
499 Int_t nnc = (fMixtComp[nc]>=20) ? fMixtComp[nc]%20 : fMixtComp[nc]%10;
500
37831078 501 wmat[nc] = fMixtProp[nc]*((fMixtComp[nc]>=20) ?
502 apure[nnc] : amol[nnc])/am;
503
504 }
505
506 // Drift gases 1 - nonsensitive, 2 - sensitive
1283eee5 507
1283eee5 508 AliMixture(31,"Drift gas 1",amat,zmat,density,fNoComp,wmat);
509 AliMixture(32,"Drift gas 2",amat,zmat,density,fNoComp,wmat);
1283eee5 510
1283eee5 511
37831078 512 // Air
513
514 amat[0] = 14.61;
515 zmat[0] = 7.3;
516 density = 0.001205;
1283eee5 517
37831078 518 AliMaterial(24,"Air",amat[0],zmat[0],density,999.,999.);
1283eee5 519
1283eee5 520
521 //----------------------------------------------------------------------
522 // solid materials
523 //----------------------------------------------------------------------
524
1283eee5 525
37831078 526 // Kevlar C14H22O2N2
1283eee5 527
37831078 528 amat[0] = 12.011;
529 amat[1] = 1.;
530 amat[2] = 15.999;
531 amat[3] = 14.006;
1283eee5 532
37831078 533 zmat[0] = 6.;
534 zmat[1] = 1.;
535 zmat[2] = 8.;
536 zmat[3] = 7.;
537
538 wmat[0] = 14.;
539 wmat[1] = 22.;
540 wmat[2] = 2.;
541 wmat[3] = 2.;
542
543 density = 1.45;
544
545 AliMixture(34,"Kevlar",amat,zmat,density,-4,wmat);
546
547 // NOMEX
1283eee5 548
37831078 549 amat[0] = 12.011;
550 amat[1] = 1.;
551 amat[2] = 15.999;
552 amat[3] = 14.006;
553
554 zmat[0] = 6.;
555 zmat[1] = 1.;
556 zmat[2] = 8.;
557 zmat[3] = 7.;
558
559 wmat[0] = 14.;
560 wmat[1] = 22.;
561 wmat[2] = 2.;
562 wmat[3] = 2.;
563
564 density = 0.03;
1283eee5 565
fe4da5cc 566
37831078 567 AliMixture(35,"NOMEX",amat,zmat,density,-4,wmat);
568
569 // Makrolon C16H18O3
570
571 amat[0] = 12.011;
572 amat[1] = 1.;
573 amat[2] = 15.999;
1283eee5 574
37831078 575 zmat[0] = 6.;
576 zmat[1] = 1.;
577 zmat[2] = 8.;
578
579 wmat[0] = 16.;
580 wmat[1] = 18.;
581 wmat[2] = 3.;
582
583 density = 1.2;
584
585 AliMixture(36,"Makrolon",amat,zmat,density,-3,wmat);
586
1283eee5 587 // Mylar C5H4O2
588
589 amat[0]=12.011;
590 amat[1]=1.;
591 amat[2]=15.9994;
592
593 zmat[0]=6.;
594 zmat[1]=1.;
595 zmat[2]=8.;
596
597 wmat[0]=5.;
598 wmat[1]=4.;
599 wmat[2]=2.;
600
601 density = 1.39;
fe4da5cc 602
37831078 603 AliMixture(37, "Mylar",amat,zmat,density,-3,wmat);
1283eee5 604
37831078 605 // G10 60% SiO2 + 40% epoxy, I use A and Z for SiO2
1283eee5 606
37831078 607 amat[0]=28.086;
608 amat[1]=15.9994;
1283eee5 609
37831078 610 zmat[0]=14.;
611 zmat[1]=8.;
1283eee5 612
37831078 613 wmat[0]=1.;
614 wmat[1]=2.;
1283eee5 615
37831078 616 density = 1.7;
1283eee5 617
37831078 618 AliMixture(38,"SiO2",amat,zmat,2.2,-2,wmat); //SiO2 - quartz
619
620 gMC->Gfmate((*fIdmate)[38],namate,amat[0],zmat[0],rho,X0,absl,buf,nbuf);
1283eee5 621
37831078 622 AliMaterial(39,"G10",amat[0],zmat[0],density,999.,999.);
1283eee5 623
37831078 624 // Al
1283eee5 625
37831078 626 amat[0] = 26.98;
627 zmat[0] = 13.;
1283eee5 628
37831078 629 density = 2.7;
1283eee5 630
37831078 631 AliMaterial(40,"Al",amat[0],zmat[0],density,999.,999.);
1283eee5 632
37831078 633 // Si
1283eee5 634
37831078 635 amat[0] = 28.086;
9a3667bd 636 zmat[0] = 14.;
1283eee5 637
37831078 638 density = 2.33;
1283eee5 639
37831078 640 AliMaterial(41,"Si",amat[0],zmat[0],density,999.,999.);
1283eee5 641
37831078 642 // Cu
1283eee5 643
37831078 644 amat[0] = 63.546;
645 zmat[0] = 29.;
1283eee5 646
37831078 647 density = 8.96;
1283eee5 648
37831078 649 AliMaterial(42,"Cu",amat[0],zmat[0],density,999.,999.);
1283eee5 650
37831078 651 // Tedlar C2H3F
1283eee5 652
37831078 653 amat[0] = 12.011;
654 amat[1] = 1.;
655 amat[2] = 18.998;
1283eee5 656
37831078 657 zmat[0] = 6.;
658 zmat[1] = 1.;
659 zmat[2] = 9.;
1283eee5 660
37831078 661 wmat[0] = 2.;
662 wmat[1] = 3.;
663 wmat[2] = 1.;
1283eee5 664
37831078 665 density = 1.71;
1283eee5 666
37831078 667 AliMixture(43, "Tedlar",amat,zmat,density,-3,wmat);
1283eee5 668
1283eee5 669
37831078 670 // Plexiglas C5H8O2
1283eee5 671
37831078 672 amat[0]=12.011;
673 amat[1]=1.;
674 amat[2]=15.9994;
1283eee5 675
37831078 676 zmat[0]=6.;
677 zmat[1]=1.;
678 zmat[2]=8.;
1283eee5 679
37831078 680 wmat[0]=5.;
681 wmat[1]=8.;
682 wmat[2]=2.;
1283eee5 683
37831078 684 density=1.18;
1283eee5 685
37831078 686 AliMixture(44,"Plexiglas",amat,zmat,density,-3,wmat);
1283eee5 687
5a28a08f 688 // Lexan - I use it for epoxy - similar X0 C16H14O3
1283eee5 689
5a28a08f 690
691 amat[0]=12.011;
692 amat[1]=1.;
693 amat[2]=15.9994;
694
695 zmat[0]=6.;
696 zmat[1]=1.;
697 zmat[2]=8.;
698
699 wmat[0]=16.;
700 wmat[1]=1.;
701 wmat[2]=3.;
702
703 density=1.2;
704
705 AliMixture(45,"Epoxy",amat,zmat,density,-3,wmat);
37831078 706
707 //----------------------------------------------------------
708 // tracking media for gases
709 //----------------------------------------------------------
710
711 AliMedium(0, "Air", 24, 0, iSXFLD, sXMGMX, 10., 999., .1, .01, .1);
712 AliMedium(1, "Drift gas 1", 31, 0, iSXFLD, sXMGMX, 10., 999.,.1,.001, .001);
713 AliMedium(2, "Drift gas 2", 32, 1, iSXFLD, sXMGMX, 10., 999.,.1,.001, .001);
714 AliMedium(3,"CO2",10,0, iSXFLD, sXMGMX, 10., 999.,.1, .001, .001);
715
716 //-----------------------------------------------------------
717 // tracking media for solids
718 //-----------------------------------------------------------
719
720 AliMedium(4,"Al",40,0, iSXFLD, sXMGMX, 10., 999., .1, .0005, .001);
721 AliMedium(5,"Kevlar",34,0, iSXFLD, sXMGMX, 10., 999., .1, .0005, .001);
722 AliMedium(6,"Nomex",35,0, iSXFLD, sXMGMX, 10., 999., .1, .001, .001);
723 AliMedium(7,"Makrolon",36,0, iSXFLD, sXMGMX, 10., 999., .1, .001, .001);
724 AliMedium(8,"Mylar",37,0, iSXFLD, sXMGMX, 10., 999., .1, .0005, .001);
725 AliMedium(9,"Tedlar",43,0, iSXFLD, sXMGMX, 10., 999., .1, .0005, .001);
726 AliMedium(10,"Cu",42,0, iSXFLD, sXMGMX, 10., 999., .1, .001, .001);
727 AliMedium(11,"Si",41,0, iSXFLD, sXMGMX, 10., 999., .1, .001, .001);
728 AliMedium(12,"G10",39,0, iSXFLD, sXMGMX, 10., 999., .1, .001, .001);
729 AliMedium(13,"Plexiglas",44,0, iSXFLD, sXMGMX, 10., 999., .1, .001, .001);
5a28a08f 730 AliMedium(14,"Epoxy",45,0, iSXFLD, sXMGMX, 10., 999., .1, .0005, .001);
1283eee5 731
fe4da5cc 732}
733
fe4da5cc 734
73042f01 735void AliTPC::Digits2Clusters(TFile *of)
fe4da5cc 736{
3c0f9266 737 //-----------------------------------------------------------------
738 // This is a simple cluster finder.
3c0f9266 739 //-----------------------------------------------------------------
73042f01 740 AliTPCclusterer::Digits2Clusters(fTPCParam,of);
fe4da5cc 741}
742
73042f01 743extern Double_t SigmaY2(Double_t, Double_t, Double_t);
744extern Double_t SigmaZ2(Double_t, Double_t);
fe4da5cc 745//_____________________________________________________________________________
73042f01 746void AliTPC::Hits2Clusters(TFile *of)
fe4da5cc 747{
8c555625 748 //--------------------------------------------------------
fe4da5cc 749 // TPC simple cluster generator from hits
750 // obtained from the TPC Fast Simulator
8c555625 751 // The point errors are taken from the parametrization
752 //--------------------------------------------------------
753
754 //-----------------------------------------------------------------
755 // Origin: Marek Kowalski IFJ, Krakow, Marek.Kowalski@ifj.edu.pl
756 //-----------------------------------------------------------------
73042f01 757 // Adopted to Marian's cluster data structure by I.Belikov, CERN,
758 // Jouri.Belikov@cern.ch
759 //----------------------------------------------------------------
760
761 /////////////////////////////////////////////////////////////////////////////
762 //
763 //---------------------------------------------------------------------
764 // ALICE TPC Cluster Parameters
765 //--------------------------------------------------------------------
766
767
768
769 // Cluster width in rphi
770 const Float_t kACrphi=0.18322;
771 const Float_t kBCrphi=0.59551e-3;
772 const Float_t kCCrphi=0.60952e-1;
773 // Cluster width in z
774 const Float_t kACz=0.19081;
775 const Float_t kBCz=0.55938e-3;
776 const Float_t kCCz=0.30428;
777
778 TDirectory *savedir=gDirectory;
779
780 if (!of->IsOpen()) {
781 cerr<<"AliTPC::Hits2Clusters(): output file not open !\n";
782 return;
783 }
3c0f9266 784
cc80f89e 785 if(fTPCParam == 0){
786 printf("AliTPCParam MUST be created firstly\n");
787 return;
788 }
789
73042f01 790 Float_t sigmaRphi,sigmaZ,clRphi,clZ;
fe4da5cc 791 //
1578254f 792 TParticle *particle; // pointer to a given particle
fe4da5cc 793 AliTPChit *tpcHit; // pointer to a sigle TPC hit
39c8eb58 794 Int_t sector;
fe4da5cc 795 Int_t ipart;
796 Float_t xyz[5];
797 Float_t pl,pt,tanth,rpad,ratio;
fe4da5cc 798 Float_t cph,sph;
799
800 //---------------------------------------------------------------
801 // Get the access to the tracks
802 //---------------------------------------------------------------
803
73042f01 804 TTree *tH = gAlice->TreeH();
805 Stat_t ntracks = tH->GetEntries();
73042f01 806
807 //Switch to the output file
808 of->cd();
809
810 fTPCParam->Write(fTPCParam->GetTitle());
811 AliTPCClustersArray carray;
812 carray.Setup(fTPCParam);
813 carray.SetClusterType("AliTPCcluster");
814 carray.MakeTree();
815
816 Int_t nclusters=0; //cluster counter
fe4da5cc 817
818 //------------------------------------------------------------
cc80f89e 819 // Loop over all sectors (72 sectors for 20 deg
820 // segmentation for both lower and upper sectors)
821 // Sectors 0-35 are lower sectors, 0-17 z>0, 17-35 z<0
3c0f9266 822 // Sectors 36-71 are upper sectors, 36-53 z>0, 54-71 z<0
fe4da5cc 823 //
3c0f9266 824 // First cluster for sector 0 starts at "0"
fe4da5cc 825 //------------------------------------------------------------
cc80f89e 826
827 for(Int_t isec=0;isec<fTPCParam->GetNSector();isec++){
8c555625 828 //MI change
cc80f89e 829 fTPCParam->AdjustCosSin(isec,cph,sph);
fe4da5cc 830
831 //------------------------------------------------------------
832 // Loop over tracks
833 //------------------------------------------------------------
834
835 for(Int_t track=0;track<ntracks;track++){
836 ResetHits();
73042f01 837 tH->GetEvent(track);
fe4da5cc 838 //
73042f01 839 // Get number of the TPC hits
fe4da5cc 840 //
39c8eb58 841 // nhits=fHits->GetEntriesFast();
fe4da5cc 842 //
39c8eb58 843
844 tpcHit = (AliTPChit*)FirstHit(-1);
845
fe4da5cc 846 // Loop over hits
847 //
39c8eb58 848 // for(Int_t hit=0;hit<nhits;hit++){
849 //tpcHit=(AliTPChit*)fHits->UncheckedAt(hit);
850
851 while(tpcHit){
852
853 if (tpcHit->fQ == 0.) {
854 tpcHit = (AliTPChit*) NextHit();
855 continue; //information about track (I.Belikov)
856 }
fe4da5cc 857 sector=tpcHit->fSector; // sector number
39c8eb58 858
859
860 // if(sector != isec) continue; //terminate iteration
861
862 if(sector != isec){
863 tpcHit = (AliTPChit*) NextHit();
864 continue;
865 }
94de3818 866 ipart=tpcHit->Track();
2ab0c725 867 particle=gAlice->Particle(ipart);
1578254f 868 pl=particle->Pz();
869 pt=particle->Pt();
fe4da5cc 870 if(pt < 1.e-9) pt=1.e-9;
871 tanth=pl/pt;
872 tanth = TMath::Abs(tanth);
94de3818 873 rpad=TMath::Sqrt(tpcHit->X()*tpcHit->X() + tpcHit->Y()*tpcHit->Y());
fe4da5cc 874 ratio=0.001*rpad/pt; // pt must be in MeV/c - historical reason
73042f01 875
fe4da5cc 876 // space-point resolutions
877
73042f01 878 sigmaRphi=SigmaY2(rpad,tanth,pt);
879 sigmaZ =SigmaZ2(rpad,tanth );
fe4da5cc 880
881 // cluster widths
882
73042f01 883 clRphi=kACrphi-kBCrphi*rpad*tanth+kCCrphi*ratio*ratio;
884 clZ=kACz-kBCz*rpad*tanth+kCCz*tanth*tanth;
fe4da5cc 885
886 // temporary protection
887
73042f01 888 if(sigmaRphi < 0.) sigmaRphi=0.4e-3;
889 if(sigmaZ < 0.) sigmaZ=0.4e-3;
890 if(clRphi < 0.) clRphi=2.5e-3;
891 if(clZ < 0.) clZ=2.5e-5;
fe4da5cc 892
893 //
cc80f89e 894
895 //
896 // smearing --> rotate to the 1 (13) or to the 25 (49) sector,
fe4da5cc 897 // then the inaccuracy in a X-Y plane is only along Y (pad row)!
898 //
94de3818 899 Float_t xprim= tpcHit->X()*cph + tpcHit->Y()*sph;
900 Float_t yprim=-tpcHit->X()*sph + tpcHit->Y()*cph;
73042f01 901 xyz[0]=gRandom->Gaus(yprim,TMath::Sqrt(sigmaRphi)); // y
902 Float_t alpha=(isec < fTPCParam->GetNInnerSector()) ?
903 fTPCParam->GetInnerAngle() : fTPCParam->GetOuterAngle();
904 Float_t ymax=xprim*TMath::Tan(0.5*alpha);
905 if (TMath::Abs(xyz[0])>ymax) xyz[0]=yprim;
94de3818 906 xyz[1]=gRandom->Gaus(tpcHit->Z(),TMath::Sqrt(sigmaZ)); // z
907 if (TMath::Abs(xyz[1])>fTPCParam->GetZLength()) xyz[1]=tpcHit->Z();
39c8eb58 908 xyz[2]=sigmaRphi; // fSigmaY2
909 xyz[3]=sigmaZ; // fSigmaZ2
910 xyz[4]=tpcHit->fQ; // q
73042f01 911
912 AliTPCClustersRow *clrow=carray.GetRow(sector,tpcHit->fPadRow);
913 if (!clrow) clrow=carray.CreateRow(sector,tpcHit->fPadRow);
914
94de3818 915 Int_t tracks[3]={tpcHit->Track(), -1, -1};
39c8eb58 916 AliTPCcluster cluster(tracks,xyz);
73042f01 917
918 clrow->InsertCluster(&cluster); nclusters++;
919
39c8eb58 920 tpcHit = (AliTPChit*)NextHit();
921
922
fe4da5cc 923 } // end of loop over hits
73042f01 924
925 } // end of loop over tracks
926
927 Int_t nrows=fTPCParam->GetNRow(isec);
928 for (Int_t irow=0; irow<nrows; irow++) {
929 AliTPCClustersRow *clrow=carray.GetRow(isec,irow);
930 if (!clrow) continue;
931 carray.StoreRow(isec,irow);
932 carray.ClearRow(isec,irow);
933 }
934
cc80f89e 935 } // end of loop over sectors
73042f01 936
937 cerr<<"Number of made clusters : "<<nclusters<<" \n";
938
939 carray.GetTree()->Write();
940
941 savedir->cd(); //switch back to the input file
cc80f89e 942
943} // end of function
944
945//_________________________________________________________________
946void AliTPC::Hits2ExactClustersSector(Int_t isec)
947{
948 //--------------------------------------------------------
949 //calculate exact cross point of track and given pad row
950 //resulting values are expressed in "digit" coordinata
951 //--------------------------------------------------------
952
953 //-----------------------------------------------------------------
954 // Origin: Marian Ivanov GSI Darmstadt, m.ivanov@gsi.de
955 //-----------------------------------------------------------------
956 //
957 if (fClustersArray==0){
958 return;
959 }
960 //
961 TParticle *particle; // pointer to a given particle
962 AliTPChit *tpcHit; // pointer to a sigle TPC hit
cc80f89e 963 Int_t sector,nhits;
964 Int_t ipart;
73042f01 965 const Int_t kcmaxhits=30000;
966 TVector * xxxx = new TVector(kcmaxhits*4);
cc80f89e 967 TVector & xxx = *xxxx;
73042f01 968 Int_t maxhits = kcmaxhits;
cc80f89e 969 //construct array for each padrow
970 for (Int_t i=0; i<fTPCParam->GetNRow(isec);i++)
971 fClustersArray->CreateRow(isec,i);
fe4da5cc 972
cc80f89e 973 //---------------------------------------------------------------
974 // Get the access to the tracks
975 //---------------------------------------------------------------
976
73042f01 977 TTree *tH = gAlice->TreeH();
978 Stat_t ntracks = tH->GetEntries();
2ab0c725 979 Int_t npart = gAlice->GetNtrack();
cc80f89e 980
981 //------------------------------------------------------------
982 // Loop over tracks
983 //------------------------------------------------------------
fe4da5cc 984
cc80f89e 985 for(Int_t track=0;track<ntracks;track++){
986 ResetHits();
73042f01 987 tH->GetEvent(track);
cc80f89e 988 //
989 // Get number of the TPC hits and a pointer
990 // to the particles
991 //
992 nhits=fHits->GetEntriesFast();
993 //
994 // Loop over hits
995 //
996 Int_t currentIndex=0;
997 Int_t lastrow=-1; //last writen row
998 for(Int_t hit=0;hit<nhits;hit++){
999 tpcHit=(AliTPChit*)fHits->UncheckedAt(hit);
1000 if (tpcHit==0) continue;
1001 sector=tpcHit->fSector; // sector number
1002 if(sector != isec) continue;
94de3818 1003 ipart=tpcHit->Track();
2ab0c725 1004 if (ipart<npart) particle=gAlice->Particle(ipart);
cc80f89e 1005
1006 //find row number
1007
94de3818 1008 Float_t x[3]={tpcHit->X(),tpcHit->Y(),tpcHit->Z()};
cc80f89e 1009 Int_t index[3]={1,isec,0};
1010 Int_t currentrow = fTPCParam->GetPadRow(x,index) ;
1011 if (currentrow<0) continue;
1012 if (lastrow<0) lastrow=currentrow;
1013 if (currentrow==lastrow){
1014 if ( currentIndex>=maxhits){
73042f01 1015 maxhits+=kcmaxhits;
cc80f89e 1016 xxx.ResizeTo(4*maxhits);
1017 }
1018 xxx(currentIndex*4)=x[0];
1019 xxx(currentIndex*4+1)=x[1];
1020 xxx(currentIndex*4+2)=x[2];
1021 xxx(currentIndex*4+3)=tpcHit->fQ;
1022 currentIndex++;
1023 }
1024 else
1025 if (currentIndex>2){
1026 Float_t sumx=0;
1027 Float_t sumx2=0;
1028 Float_t sumx3=0;
1029 Float_t sumx4=0;
1030 Float_t sumy=0;
1031 Float_t sumxy=0;
1032 Float_t sumx2y=0;
1033 Float_t sumz=0;
1034 Float_t sumxz=0;
1035 Float_t sumx2z=0;
1036 Float_t sumq=0;
1037 for (Int_t index=0;index<currentIndex;index++){
1038 Float_t x,x2,x3,x4;
1039 x=x2=x3=x4=xxx(index*4);
1040 x2*=x;
1041 x3*=x2;
1042 x4*=x3;
1043 sumx+=x;
1044 sumx2+=x2;
1045 sumx3+=x3;
1046 sumx4+=x4;
1047 sumy+=xxx(index*4+1);
1048 sumxy+=xxx(index*4+1)*x;
1049 sumx2y+=xxx(index*4+1)*x2;
1050 sumz+=xxx(index*4+2);
1051 sumxz+=xxx(index*4+2)*x;
1052 sumx2z+=xxx(index*4+2)*x2;
1053 sumq+=xxx(index*4+3);
1054 }
73042f01 1055 Float_t centralPad = (fTPCParam->GetNPads(isec,lastrow)-1)/2;
cc80f89e 1056 Float_t det=currentIndex*(sumx2*sumx4-sumx3*sumx3)-sumx*(sumx*sumx4-sumx2*sumx3)+
1057 sumx2*(sumx*sumx3-sumx2*sumx2);
1058
1059 Float_t detay=sumy*(sumx2*sumx4-sumx3*sumx3)-sumx*(sumxy*sumx4-sumx2y*sumx3)+
1060 sumx2*(sumxy*sumx3-sumx2y*sumx2);
1061 Float_t detaz=sumz*(sumx2*sumx4-sumx3*sumx3)-sumx*(sumxz*sumx4-sumx2z*sumx3)+
1062 sumx2*(sumxz*sumx3-sumx2z*sumx2);
1063
1064 Float_t detby=currentIndex*(sumxy*sumx4-sumx2y*sumx3)-sumy*(sumx*sumx4-sumx2*sumx3)+
1065 sumx2*(sumx*sumx2y-sumx2*sumxy);
1066 Float_t detbz=currentIndex*(sumxz*sumx4-sumx2z*sumx3)-sumz*(sumx*sumx4-sumx2*sumx3)+
1067 sumx2*(sumx*sumx2z-sumx2*sumxz);
1068
73042f01 1069 Float_t y=detay/det+centralPad;
cc80f89e 1070 Float_t z=detaz/det;
1071 Float_t by=detby/det; //y angle
1072 Float_t bz=detbz/det; //z angle
1073 sumy/=Float_t(currentIndex);
1074 sumz/=Float_t(currentIndex);
2b06d5c3 1075 AliComplexCluster cl;
cc80f89e 1076 cl.fX=z;
1077 cl.fY=y;
1078 cl.fQ=sumq;
1079 cl.fSigmaX2=bz;
1080 cl.fSigmaY2=by;
1081 cl.fTracks[0]=ipart;
1082
1083 AliTPCClustersRow * row = (fClustersArray->GetRow(isec,lastrow));
1084 if (row!=0) row->InsertCluster(&cl);
1085 currentIndex=0;
1086 lastrow=currentrow;
1087 } //end of calculating cluster for given row
1088
1089
1090
1091 } // end of loop over hits
1092 } // end of loop over tracks
1093 //write padrows to tree
1094 for (Int_t ii=0; ii<fTPCParam->GetNRow(isec);ii++) {
1095 fClustersArray->StoreRow(isec,ii);
1096 fClustersArray->ClearRow(isec,ii);
1097 }
1098 xxxx->Delete();
1099
fe4da5cc 1100}
2ab0c725 1101//___________________________________________
1102void AliTPC::SDigits2Digits()
1103{
1104 AliTPCParamSR *param=(AliTPCParamSR*)gDirectory->Get("75x40_100x60");
1105 AliTPCPRF2D * prfinner = new AliTPCPRF2D;
1106 AliTPCPRF2D * prfouter = new AliTPCPRF2D;
1107 AliTPCRF1D * rf = new AliTPCRF1D(kTRUE);
1108
1109 TDirectory *cwd = gDirectory;
1110 rf->SetGauss(param->GetZSigma(),param->GetZWidth(),1.);
1111 rf->SetOffset(3*param->GetZSigma());
1112 rf->Update();
1113 TFile *f=TFile::Open("$ALICE_ROOT/TPC/AliTPCprf2d.root");
1114 if (!f->IsOpen()) {
1115 cerr<<"Can't open $ALICE_ROOT/TPC/AliTPCprf2d.root !\n";
1116 exit(3);
1117 }
1118 prfinner->Read("prf_07504_Gati_056068_d02");
1119 prfouter->Read("prf_10006_Gati_047051_d03");
1120 f->Close();
1121 cwd->cd();
1122
1123 param->SetInnerPRF(prfinner);
1124 param->SetOuterPRF(prfouter);
1125 param->SetTimeRF(rf);
1126
1127 SetParam(param);
1128
1129 cerr<<"Digitizing TPC...\n";
1130
1131 //setup TPCDigitsArray
1132 AliTPCDigitsArray *arr = new AliTPCDigitsArray;
1133 arr->SetClass("AliSimDigits");
1134 arr->Setup(param);
1135 SetParam(param);
1136
1137 arr->MakeTree(fDigitsFile);
1138
1139 SetDigitsArray(arr);
1140
1141 Hits2Digits();
1142
1143 // Hits2DigitsSector(1);
1144 // Hits2DigitsSector(2);
1145 // Hits2DigitsSector(3);
1146 // Hits2DigitsSector(1+18);
1147 // Hits2DigitsSector(2+18);
1148 // Hits2DigitsSector(3+18);
1149
1150 // Hits2DigitsSector(36+1);
1151 // Hits2DigitsSector(36+2);
1152 // Hits2DigitsSector(36+3);
1153 // Hits2DigitsSector(36+1+18);
1154 // Hits2DigitsSector(36+2+18);
1155 // Hits2DigitsSector(36+3+18);
1156
1157 //write results
1158
1159 char treeName[100];
1160 sprintf(treeName,"TreeD_%s",param->GetTitle());
1161 GetDigitsArray()->GetTree()->Write(treeName,TObject::kOverwrite);
1162}
fe4da5cc 1163
cc80f89e 1164//__________________________________________________________________
8c555625 1165void AliTPC::Hits2Digits()
1166{
8c555625 1167 //----------------------------------------------------
cc80f89e 1168 // Loop over all sectors
1169 //----------------------------------------------------
1170
1171 if(fTPCParam == 0){
1172 printf("AliTPCParam MUST be created firstly\n");
1173 return;
1174 }
1175
1176 for(Int_t isec=0;isec<fTPCParam->GetNSector();isec++) Hits2DigitsSector(isec);
1177
8c555625 1178}
1179
1180
fe4da5cc 1181//_____________________________________________________________________________
8c555625 1182void AliTPC::Hits2DigitsSector(Int_t isec)
fe4da5cc 1183{
8c555625 1184 //-------------------------------------------------------------------
fe4da5cc 1185 // TPC conversion from hits to digits.
8c555625 1186 //-------------------------------------------------------------------
1187
1188 //-----------------------------------------------------------------
1189 // Origin: Marek Kowalski IFJ, Krakow, Marek.Kowalski@ifj.edu.pl
1190 //-----------------------------------------------------------------
1191
fe4da5cc 1192 //-------------------------------------------------------
8c555625 1193 // Get the access to the track hits
fe4da5cc 1194 //-------------------------------------------------------
8c555625 1195
cc80f89e 1196
73042f01 1197 TTree *tH = gAlice->TreeH(); // pointer to the hits tree
1198 Stat_t ntracks = tH->GetEntries();
8c555625 1199
1200 if( ntracks > 0){
1201
1202 //-------------------------------------------
1203 // Only if there are any tracks...
1204 //-------------------------------------------
1205
8c555625 1206 TObjArray **row;
fe4da5cc 1207
5a28a08f 1208 //printf("*** Processing sector number %d ***\n",isec);
8c555625 1209
1210 Int_t nrows =fTPCParam->GetNRow(isec);
1211
1212 row= new TObjArray* [nrows];
fe4da5cc 1213
73042f01 1214 MakeSector(isec,nrows,tH,ntracks,row);
8c555625 1215
1216 //--------------------------------------------------------
1217 // Digitize this sector, row by row
1218 // row[i] is the pointer to the TObjArray of TVectors,
1219 // each one containing electrons accepted on this
1220 // row, assigned into tracks
1221 //--------------------------------------------------------
1222
1223 Int_t i;
1224
2ab0c725 1225 if (fDigitsArray->GetTree()==0) fDigitsArray->MakeTree(fDigitsFile);
8c555625 1226
cc80f89e 1227 for (i=0;i<nrows;i++){
8c555625 1228
5a28a08f 1229 AliDigits * dig = fDigitsArray->CreateRow(isec,i);
8c555625 1230
cc80f89e 1231 DigitizeRow(i,isec,row);
8c555625 1232
cc80f89e 1233 fDigitsArray->StoreRow(isec,i);
8c555625 1234
73042f01 1235 Int_t ndig = dig->GetDigitSize();
5a28a08f 1236
cc80f89e 1237
5a28a08f 1238 //printf("*** Sector, row, compressed digits %d %d %d ***\n",isec,i,ndig);
cc80f89e 1239
1240 fDigitsArray->ClearRow(isec,i);
8c555625 1241
cc80f89e 1242
8c555625 1243 } // end of the sector digitization
8c555625 1244
cc80f89e 1245 for(i=0;i<nrows;i++){
39c8eb58 1246 row[i]->Delete();
1247 delete row[i];
cc80f89e 1248 }
1249
8c555625 1250 delete [] row; // delete the array of pointers to TObjArray-s
1251
1252 } // ntracks >0
8c555625 1253
cc80f89e 1254} // end of Hits2DigitsSector
8c555625 1255
8c555625 1256
8c555625 1257//_____________________________________________________________________________
cc80f89e 1258void AliTPC::DigitizeRow(Int_t irow,Int_t isec,TObjArray **rows)
8c555625 1259{
1260 //-----------------------------------------------------------
1261 // Single row digitization, coupling from the neighbouring
1262 // rows taken into account
1263 //-----------------------------------------------------------
1264
1265 //-----------------------------------------------------------------
1266 // Origin: Marek Kowalski IFJ, Krakow, Marek.Kowalski@ifj.edu.pl
cc80f89e 1267 // Modified: Marian Ivanov GSI Darmstadt, m.ivanov@gsi.de
8c555625 1268 //-----------------------------------------------------------------
1269
1270
8c555625 1271 Float_t zerosup = fTPCParam->GetZeroSup();
1272 Int_t nrows =fTPCParam->GetNRow(isec);
cc80f89e 1273 fCurrentIndex[1]= isec;
8c555625 1274
8c555625 1275
73042f01 1276 Int_t nofPads = fTPCParam->GetNPads(isec,irow);
1277 Int_t nofTbins = fTPCParam->GetMaxTBin();
1278 Int_t indexRange[4];
8c555625 1279 //
1280 // Integrated signal for this row
1281 // and a single track signal
cc80f89e 1282 //
73042f01 1283 TMatrix *m1 = new TMatrix(0,nofPads,0,nofTbins); // integrated
1284 TMatrix *m2 = new TMatrix(0,nofPads,0,nofTbins); // single
8c555625 1285 //
73042f01 1286 TMatrix &total = *m1;
8c555625 1287
1288 // Array of pointers to the label-signal list
1289
73042f01 1290 Int_t nofDigits = nofPads*nofTbins; // number of digits for this row
1291 Float_t **pList = new Float_t* [nofDigits];
8c555625 1292
1293 Int_t lp;
cc80f89e 1294 Int_t i1;
73042f01 1295 for(lp=0;lp<nofDigits;lp++)pList[lp]=0; // set all pointers to NULL
8c555625 1296 //
cc80f89e 1297 //calculate signal
1298 //
1299 Int_t row1 = TMath::Max(irow-fTPCParam->GetNCrossRows(),0);
1300 Int_t row2 = TMath::Min(irow+fTPCParam->GetNCrossRows(),nrows-1);
1301 for (Int_t row= row1;row<=row2;row++){
1302 Int_t nTracks= rows[row]->GetEntries();
1303 for (i1=0;i1<nTracks;i1++){
1304 fCurrentIndex[2]= row;
1305 fCurrentIndex[3]=irow;
1306 if (row==irow){
1307 m2->Zero(); // clear single track signal matrix
73042f01 1308 Float_t trackLabel = GetSignal(rows[row],i1,m2,m1,indexRange);
1309 GetList(trackLabel,nofPads,m2,indexRange,pList);
cc80f89e 1310 }
73042f01 1311 else GetSignal(rows[row],i1,0,m1,indexRange);
cc80f89e 1312 }
8c555625 1313 }
cc80f89e 1314
8c555625 1315 Int_t tracks[3];
8c555625 1316
cc80f89e 1317 AliDigits *dig = fDigitsArray->GetRow(isec,irow);
73042f01 1318 for(Int_t ip=0;ip<nofPads;ip++){
1319 for(Int_t it=0;it<nofTbins;it++){
8c555625 1320
73042f01 1321 Float_t q = total(ip,it);
8c555625 1322
73042f01 1323 Int_t gi =it*nofPads+ip; // global index
8c555625 1324
cc80f89e 1325 q = gRandom->Gaus(q,fTPCParam->GetNoise()*fTPCParam->GetNoiseNormFac());
8c555625 1326
cc80f89e 1327 q = (Int_t)q;
1328
1329 if(q <=zerosup) continue; // do not fill zeros
73042f01 1330 if(q > fTPCParam->GetADCSat()) q = fTPCParam->GetADCSat(); // saturation
8c555625 1331
1332 //
1333 // "real" signal or electronic noise (list = -1)?
1334 //
1335
1336 for(Int_t j1=0;j1<3;j1++){
1337 tracks[j1] = (pList[gi]) ?(Int_t)(*(pList[gi]+j1)) : -1;
1338 }
1339
cc80f89e 1340//Begin_Html
1341/*
1342 <A NAME="AliDigits"></A>
1343 using of AliDigits object
1344*/
1345//End_Html
1346 dig->SetDigitFast((Short_t)q,it,ip);
1347 if (fDigitsArray->IsSimulated())
1348 {
1349 ((AliSimDigits*)dig)->SetTrackIDFast(tracks[0],it,ip,0);
1350 ((AliSimDigits*)dig)->SetTrackIDFast(tracks[1],it,ip,1);
1351 ((AliSimDigits*)dig)->SetTrackIDFast(tracks[2],it,ip,2);
1352 }
1353
8c555625 1354
1355 } // end of loop over time buckets
1356 } // end of lop over pads
1357
1358 //
1359 // This row has been digitized, delete nonused stuff
1360 //
1361
73042f01 1362 for(lp=0;lp<nofDigits;lp++){
8c555625 1363 if(pList[lp]) delete [] pList[lp];
1364 }
1365
1366 delete [] pList;
1367
1368 delete m1;
1369 delete m2;
cc80f89e 1370 // delete m3;
8c555625 1371
1372} // end of DigitizeRow
cc80f89e 1373
8c555625 1374//_____________________________________________________________________________
cc80f89e 1375
1376Float_t AliTPC::GetSignal(TObjArray *p1, Int_t ntr, TMatrix *m1, TMatrix *m2,
73042f01 1377 Int_t *indexRange)
8c555625 1378{
1379
1380 //---------------------------------------------------------------
1381 // Calculates 2-D signal (pad,time) for a single track,
1382 // returns a pointer to the signal matrix and the track label
1383 // No digitization is performed at this level!!!
1384 //---------------------------------------------------------------
1385
1386 //-----------------------------------------------------------------
1387 // Origin: Marek Kowalski IFJ, Krakow, Marek.Kowalski@ifj.edu.pl
cc80f89e 1388 // Modified: Marian Ivanov
8c555625 1389 //-----------------------------------------------------------------
1390
1391 TVector *tv;
8c555625 1392
8c555625 1393 tv = (TVector*)p1->At(ntr); // pointer to a track
1394 TVector &v = *tv;
1395
1396 Float_t label = v(0);
73042f01 1397 Int_t centralPad = (fTPCParam->GetNPads(fCurrentIndex[1],fCurrentIndex[3])-1)/2;
8c555625 1398
8c555625 1399 Int_t nElectrons = (tv->GetNrows()-1)/4;
73042f01 1400 indexRange[0]=9999; // min pad
1401 indexRange[1]=-1; // max pad
1402 indexRange[2]=9999; //min time
1403 indexRange[3]=-1; // max time
8c555625 1404
cc80f89e 1405 // Float_t IneffFactor = 0.5; // inefficiency in the gain close to the edge, as above
1406
1407 TMatrix &signal = *m1;
1408 TMatrix &total = *m2;
8c555625 1409 //
1410 // Loop over all electrons
1411 //
8c555625 1412 for(Int_t nel=0; nel<nElectrons; nel++){
cc80f89e 1413 Int_t idx=nel*4;
1414 Float_t aval = v(idx+4);
1415 Float_t eltoadcfac=aval*fTPCParam->GetTotalNormFac();
1416 Float_t xyz[3]={v(idx+1),v(idx+2),v(idx+3)};
1417 Int_t n = fTPCParam->CalcResponse(xyz,fCurrentIndex,fCurrentIndex[3]);
8c555625 1418
cc80f89e 1419 if (n>0) for (Int_t i =0; i<n; i++){
1420 Int_t *index = fTPCParam->GetResBin(i);
73042f01 1421 Int_t pad=index[1]+centralPad; //in digit coordinates central pad has coordinate 0
cc80f89e 1422 if ( ( pad<(fTPCParam->GetNPads(fCurrentIndex[1],fCurrentIndex[3]))) && (pad>0)) {
1423 Int_t time=index[2];
1424 Float_t weight = fTPCParam->GetResWeight(i); //we normalise response to ADC channel
1425 weight *= eltoadcfac;
1426
1427 if (m1!=0) signal(pad,time)+=weight;
1428 total(pad,time)+=weight;
73042f01 1429 indexRange[0]=TMath::Min(indexRange[0],pad);
1430 indexRange[1]=TMath::Max(indexRange[1],pad);
1431 indexRange[2]=TMath::Min(indexRange[2],time);
1432 indexRange[3]=TMath::Max(indexRange[3],time);
cc80f89e 1433 }
1434 }
8c555625 1435 } // end of loop over electrons
cc80f89e 1436
8c555625 1437 return label; // returns track label when finished
1438}
1439
1440//_____________________________________________________________________________
73042f01 1441void AliTPC::GetList(Float_t label,Int_t np,TMatrix *m,Int_t *indexRange,
8c555625 1442 Float_t **pList)
1443{
1444 //----------------------------------------------------------------------
1445 // Updates the list of tracks contributing to digits for a given row
1446 //----------------------------------------------------------------------
1447
1448 //-----------------------------------------------------------------
1449 // Origin: Marek Kowalski IFJ, Krakow, Marek.Kowalski@ifj.edu.pl
1450 //-----------------------------------------------------------------
1451
1452 TMatrix &signal = *m;
1453
1454 // lop over nonzero digits
1455
73042f01 1456 for(Int_t it=indexRange[2];it<indexRange[3]+1;it++){
1457 for(Int_t ip=indexRange[0];ip<indexRange[1]+1;ip++){
8c555625 1458
1459
921bf71a 1460 // accept only the contribution larger than 500 electrons (1/2 s_noise)
1461
cc80f89e 1462 if(signal(ip,it)<0.5) continue;
921bf71a 1463
1464
73042f01 1465 Int_t globalIndex = it*np+ip; // globalIndex starts from 0!
8c555625 1466
73042f01 1467 if(!pList[globalIndex]){
8c555625 1468
1469 //
1470 // Create new list (6 elements - 3 signals and 3 labels),
8c555625 1471 //
1472
73042f01 1473 pList[globalIndex] = new Float_t [6];
8c555625 1474
1475 // set list to -1
1476
73042f01 1477 *pList[globalIndex] = -1.;
1478 *(pList[globalIndex]+1) = -1.;
1479 *(pList[globalIndex]+2) = -1.;
1480 *(pList[globalIndex]+3) = -1.;
1481 *(pList[globalIndex]+4) = -1.;
1482 *(pList[globalIndex]+5) = -1.;
8c555625 1483
1484
73042f01 1485 *pList[globalIndex] = label;
1486 *(pList[globalIndex]+3) = signal(ip,it);
8c555625 1487 }
1488 else{
1489
1490 // check the signal magnitude
1491
73042f01 1492 Float_t highest = *(pList[globalIndex]+3);
1493 Float_t middle = *(pList[globalIndex]+4);
1494 Float_t lowest = *(pList[globalIndex]+5);
8c555625 1495
1496 //
1497 // compare the new signal with already existing list
1498 //
1499
1500 if(signal(ip,it)<lowest) continue; // neglect this track
1501
1502 //
1503
1504 if (signal(ip,it)>highest){
73042f01 1505 *(pList[globalIndex]+5) = middle;
1506 *(pList[globalIndex]+4) = highest;
1507 *(pList[globalIndex]+3) = signal(ip,it);
8c555625 1508
73042f01 1509 *(pList[globalIndex]+2) = *(pList[globalIndex]+1);
1510 *(pList[globalIndex]+1) = *pList[globalIndex];
1511 *pList[globalIndex] = label;
8c555625 1512 }
1513 else if (signal(ip,it)>middle){
73042f01 1514 *(pList[globalIndex]+5) = middle;
1515 *(pList[globalIndex]+4) = signal(ip,it);
8c555625 1516
73042f01 1517 *(pList[globalIndex]+2) = *(pList[globalIndex]+1);
1518 *(pList[globalIndex]+1) = label;
8c555625 1519 }
1520 else{
73042f01 1521 *(pList[globalIndex]+5) = signal(ip,it);
1522 *(pList[globalIndex]+2) = label;
8c555625 1523 }
1524 }
1525
1526 } // end of loop over pads
1527 } // end of loop over time bins
1528
1529
1530
8c555625 1531}//end of GetList
1532//___________________________________________________________________
1533void AliTPC::MakeSector(Int_t isec,Int_t nrows,TTree *TH,
1534 Stat_t ntracks,TObjArray **row)
1535{
1536
1537 //-----------------------------------------------------------------
1538 // Prepares the sector digitization, creates the vectors of
1539 // tracks for each row of this sector. The track vector
1540 // contains the track label and the position of electrons.
1541 //-----------------------------------------------------------------
1542
1543 //-----------------------------------------------------------------
1544 // Origin: Marek Kowalski IFJ, Krakow, Marek.Kowalski@ifj.edu.pl
1545 //-----------------------------------------------------------------
1546
cc80f89e 1547 Float_t gasgain = fTPCParam->GetGasGain();
8c555625 1548 Int_t i;
cc80f89e 1549 Float_t xyz[4];
8c555625 1550
1551 AliTPChit *tpcHit; // pointer to a sigle TPC hit
39c8eb58 1552 //MI change
1553 TBranch * branch=0;
1554 if (fHitType&2) branch = TH->GetBranch("TPC2");
1555 else branch = TH->GetBranch("TPC");
1556
8c555625 1557
1558 //----------------------------------------------
1559 // Create TObjArray-s, one for each row,
1560 // each TObjArray will store the TVectors
1561 // of electrons, one TVector per each track.
1562 //----------------------------------------------
1563
f74bb6f5 1564 Int_t *nofElectrons = new Int_t [nrows]; // electron counter for each row
1565 TVector **tracks = new TVector* [nrows]; //pointers to the track vectors
8c555625 1566 for(i=0; i<nrows; i++){
1567 row[i] = new TObjArray;
f74bb6f5 1568 nofElectrons[i]=0;
1569 tracks[i]=0;
8c555625 1570 }
8c555625 1571
37831078 1572
1573
8c555625 1574 //--------------------------------------------------------------------
1575 // Loop over tracks, the "track" contains the full history
1576 //--------------------------------------------------------------------
1577
1578 Int_t previousTrack,currentTrack;
1579 previousTrack = -1; // nothing to store so far!
1580
1581 for(Int_t track=0;track<ntracks;track++){
39c8eb58 1582 Bool_t isInSector=kTRUE;
8c555625 1583 ResetHits();
1584
39c8eb58 1585 if (fHitType&2) {
1586 isInSector=kFALSE;
1587 TBranch * br = TH->GetBranch("fTrackHitsInfo");
1588 br->GetEvent(track);
1589 AliObjectArray * ar = fTrackHits->fTrackHitsInfo;
1590 for (UInt_t j=0;j<ar->GetSize();j++){
1591 if ( ((AliTrackHitsInfo*)ar->At(j))->fVolumeID==isec) isInSector=kTRUE;
1592 }
1593 }
1594 if (!isInSector) continue;
1595 //MI change
1596 branch->GetEntry(track); // get next track
1597
1598 //M.I. changes
8c555625 1599
39c8eb58 1600 tpcHit = (AliTPChit*)FirstHit(-1);
8c555625 1601
1602 //--------------------------------------------------------------
1603 // Loop over hits
1604 //--------------------------------------------------------------
1605
8c555625 1606
39c8eb58 1607 while(tpcHit){
8c555625 1608
1609 Int_t sector=tpcHit->fSector; // sector number
39c8eb58 1610 // if(sector != isec) continue;
1611 if(sector != isec){
1612 tpcHit = (AliTPChit*) NextHit();
1613 continue;
1614 }
8c555625 1615
94de3818 1616 currentTrack = tpcHit->Track(); // track number
39c8eb58 1617
1618
8c555625 1619 if(currentTrack != previousTrack){
1620
1621 // store already filled fTrack
1622
1623 for(i=0;i<nrows;i++){
1624 if(previousTrack != -1){
73042f01 1625 if(nofElectrons[i]>0){
cc80f89e 1626 TVector &v = *tracks[i];
8c555625 1627 v(0) = previousTrack;
73042f01 1628 tracks[i]->ResizeTo(4*nofElectrons[i]+1); // shrink if necessary
cc80f89e 1629 row[i]->Add(tracks[i]);
8c555625 1630 }
1631 else{
cc80f89e 1632 delete tracks[i]; // delete empty TVector
1633 tracks[i]=0;
8c555625 1634 }
1635 }
1636
73042f01 1637 nofElectrons[i]=0;
cc80f89e 1638 tracks[i] = new TVector(481); // TVectors for the next fTrack
8c555625 1639
1640 } // end of loop over rows
1641
1642 previousTrack=currentTrack; // update track label
1643 }
1644
73042f01 1645 Int_t qI = (Int_t) (tpcHit->fQ); // energy loss (number of electrons)
8c555625 1646
1647 //---------------------------------------------------
1648 // Calculate the electron attachment probability
1649 //---------------------------------------------------
1650
cc80f89e 1651
94de3818 1652 Float_t time = 1.e6*(fTPCParam->GetZLength()-TMath::Abs(tpcHit->Z()))
cc80f89e 1653 /fTPCParam->GetDriftV();
8c555625 1654 // in microseconds!
73042f01 1655 Float_t attProb = fTPCParam->GetAttCoef()*
8c555625 1656 fTPCParam->GetOxyCont()*time; // fraction!
1657
1658 //-----------------------------------------------
1659 // Loop over electrons
1660 //-----------------------------------------------
cc80f89e 1661 Int_t index[3];
1662 index[1]=isec;
73042f01 1663 for(Int_t nel=0;nel<qI;nel++){
8c555625 1664 // skip if electron lost due to the attachment
73042f01 1665 if((gRandom->Rndm(0)) < attProb) continue; // electron lost!
94de3818 1666 xyz[0]=tpcHit->X();
1667 xyz[1]=tpcHit->Y();
1705494b 1668 xyz[2]=tpcHit->Z();
1669 //
1670 // protection for the nonphysical avalanche size (10**6 maximum)
1671 //
710dacf5 1672 Double_t rn=TMath::Max(gRandom->Rndm(0),1.93e-22);
1673 xyz[3]= (Float_t) (-gasgain*TMath::Log(rn));
cc80f89e 1674 index[0]=1;
1675
1676 TransportElectron(xyz,index); //MI change -august
73042f01 1677 Int_t rowNumber;
cc80f89e 1678 fTPCParam->GetPadRow(xyz,index); //MI change august
73042f01 1679 rowNumber = index[2];
cc80f89e 1680 //transform position to local digit coordinates
1681 //relative to nearest pad row
73042f01 1682 if ((rowNumber<0)||rowNumber>=fTPCParam->GetNRow(isec)) continue;
1683 nofElectrons[rowNumber]++;
8c555625 1684 //----------------------------------
1685 // Expand vector if necessary
1686 //----------------------------------
73042f01 1687 if(nofElectrons[rowNumber]>120){
1688 Int_t range = tracks[rowNumber]->GetNrows();
1689 if((nofElectrons[rowNumber])>(range-1)/4){
cc80f89e 1690
73042f01 1691 tracks[rowNumber]->ResizeTo(range+400); // Add 100 electrons
fe4da5cc 1692 }
1693 }
1694
73042f01 1695 TVector &v = *tracks[rowNumber];
1696 Int_t idx = 4*nofElectrons[rowNumber]-3;
8c555625 1697
cc80f89e 1698 v(idx)= xyz[0]; // X - pad row coordinate
1699 v(idx+1)=xyz[1]; // Y - pad coordinate (along the pad-row)
1700 v(idx+2)=xyz[2]; // Z - time bin coordinate
1701 v(idx+3)=xyz[3]; // avalanche size
8c555625 1702 } // end of loop over electrons
39c8eb58 1703
1704 tpcHit = (AliTPChit*)NextHit();
8c555625 1705
1706 } // end of loop over hits
1707 } // end of loop over tracks
1708
1709 //
1710 // store remaining track (the last one) if not empty
1711 //
1712
1713 for(i=0;i<nrows;i++){
73042f01 1714 if(nofElectrons[i]>0){
cc80f89e 1715 TVector &v = *tracks[i];
8c555625 1716 v(0) = previousTrack;
73042f01 1717 tracks[i]->ResizeTo(4*nofElectrons[i]+1); // shrink if necessary
cc80f89e 1718 row[i]->Add(tracks[i]);
fe4da5cc 1719 }
1720 else{
cc80f89e 1721 delete tracks[i];
1722 tracks[i]=0;
8c555625 1723 }
1724 }
1725
cc80f89e 1726 delete [] tracks;
73042f01 1727 delete [] nofElectrons;
8c555625 1728
8c555625 1729
cc80f89e 1730} // end of MakeSector
8c555625 1731
fe4da5cc 1732
1733//_____________________________________________________________________________
1734void AliTPC::Init()
1735{
1736 //
1737 // Initialise TPC detector after definition of geometry
1738 //
1739 Int_t i;
1740 //
1741 printf("\n");
1742 for(i=0;i<35;i++) printf("*");
1743 printf(" TPC_INIT ");
1744 for(i=0;i<35;i++) printf("*");
1745 printf("\n");
1746 //
1747 for(i=0;i<80;i++) printf("*");
1748 printf("\n");
1749}
1750
1751//_____________________________________________________________________________
2ab0c725 1752void AliTPC::MakeBranch(Option_t* option, char *file)
fe4da5cc 1753{
1754 //
1755 // Create Tree branches for the TPC.
1756 //
1757 Int_t buffersize = 4000;
1758 char branchname[10];
1759 sprintf(branchname,"%s",GetName());
1760
2ab0c725 1761 AliDetector::MakeBranch(option,file);
fe4da5cc 1762
5cf7bbad 1763 const char *d = strstr(option,"D");
fe4da5cc 1764
73042f01 1765 if (fDigits && gAlice->TreeD() && d) {
2ab0c725 1766 gAlice->MakeBranchInTree(gAlice->TreeD(),
1767 branchname, &fDigits, buffersize, file) ;
fe4da5cc 1768 }
39c8eb58 1769
2ab0c725 1770 if (fHitType&2) MakeBranch2(option,file); // MI change 14.09.2000
fe4da5cc 1771}
1772
1773//_____________________________________________________________________________
1774void AliTPC::ResetDigits()
1775{
1776 //
1777 // Reset number of digits and the digits array for this detector
fe4da5cc 1778 //
1779 fNdigits = 0;
cc80f89e 1780 if (fDigits) fDigits->Clear();
fe4da5cc 1781}
1782
1783//_____________________________________________________________________________
1784void AliTPC::SetSecAL(Int_t sec)
1785{
8c555625 1786 //---------------------------------------------------
fe4da5cc 1787 // Activate/deactivate selection for lower sectors
8c555625 1788 //---------------------------------------------------
1789
1790 //-----------------------------------------------------------------
1791 // Origin: Marek Kowalski IFJ, Krakow, Marek.Kowalski@ifj.edu.pl
1792 //-----------------------------------------------------------------
1793
fe4da5cc 1794 fSecAL = sec;
1795}
1796
1797//_____________________________________________________________________________
1798void AliTPC::SetSecAU(Int_t sec)
1799{
8c555625 1800 //----------------------------------------------------
fe4da5cc 1801 // Activate/deactivate selection for upper sectors
8c555625 1802 //---------------------------------------------------
1803
1804 //-----------------------------------------------------------------
1805 // Origin: Marek Kowalski IFJ, Krakow, Marek.Kowalski@ifj.edu.pl
1806 //-----------------------------------------------------------------
1807
fe4da5cc 1808 fSecAU = sec;
1809}
1810
1811//_____________________________________________________________________________
1812void AliTPC::SetSecLows(Int_t s1,Int_t s2,Int_t s3,Int_t s4,Int_t s5, Int_t s6)
1813{
8c555625 1814 //----------------------------------------
fe4da5cc 1815 // Select active lower sectors
8c555625 1816 //----------------------------------------
1817
1818 //-----------------------------------------------------------------
1819 // Origin: Marek Kowalski IFJ, Krakow, Marek.Kowalski@ifj.edu.pl
1820 //-----------------------------------------------------------------
1821
fe4da5cc 1822 fSecLows[0] = s1;
1823 fSecLows[1] = s2;
1824 fSecLows[2] = s3;
1825 fSecLows[3] = s4;
1826 fSecLows[4] = s5;
1827 fSecLows[5] = s6;
1828}
1829
1830//_____________________________________________________________________________
1831void AliTPC::SetSecUps(Int_t s1,Int_t s2,Int_t s3,Int_t s4,Int_t s5, Int_t s6,
1832 Int_t s7, Int_t s8 ,Int_t s9 ,Int_t s10,
1833 Int_t s11 , Int_t s12)
1834{
8c555625 1835 //--------------------------------
fe4da5cc 1836 // Select active upper sectors
8c555625 1837 //--------------------------------
1838
1839 //-----------------------------------------------------------------
1840 // Origin: Marek Kowalski IFJ, Krakow, Marek.Kowalski@ifj.edu.pl
1841 //-----------------------------------------------------------------
1842
fe4da5cc 1843 fSecUps[0] = s1;
1844 fSecUps[1] = s2;
1845 fSecUps[2] = s3;
1846 fSecUps[3] = s4;
1847 fSecUps[4] = s5;
1848 fSecUps[5] = s6;
1849 fSecUps[6] = s7;
1850 fSecUps[7] = s8;
1851 fSecUps[8] = s9;
1852 fSecUps[9] = s10;
1853 fSecUps[10] = s11;
1854 fSecUps[11] = s12;
1855}
1856
1857//_____________________________________________________________________________
1858void AliTPC::SetSens(Int_t sens)
1859{
8c555625 1860
1861 //-------------------------------------------------------------
1862 // Activates/deactivates the sensitive strips at the center of
1863 // the pad row -- this is for the space-point resolution calculations
1864 //-------------------------------------------------------------
1865
1866 //-----------------------------------------------------------------
1867 // Origin: Marek Kowalski IFJ, Krakow, Marek.Kowalski@ifj.edu.pl
1868 //-----------------------------------------------------------------
1869
fe4da5cc 1870 fSens = sens;
1871}
2b06d5c3 1872
4b0fdcad 1873
73042f01 1874void AliTPC::SetSide(Float_t side=0.)
4b0fdcad 1875{
73042f01 1876 // choice of the TPC side
1877
4b0fdcad 1878 fSide = side;
1879
1880}
1283eee5 1881//____________________________________________________________________________
1882void AliTPC::SetGasMixt(Int_t nc,Int_t c1,Int_t c2,Int_t c3,Float_t p1,
1883 Float_t p2,Float_t p3)
1884{
fe4da5cc 1885
73042f01 1886 // gax mixture definition
1887
1283eee5 1888 fNoComp = nc;
1889
1890 fMixtComp[0]=c1;
1891 fMixtComp[1]=c2;
1892 fMixtComp[2]=c3;
1893
1894 fMixtProp[0]=p1;
1895 fMixtProp[1]=p2;
1896 fMixtProp[2]=p3;
1897
1898
cc80f89e 1899}
1900//_____________________________________________________________________________
1901
1902void AliTPC::TransportElectron(Float_t *xyz, Int_t *index)
1903{
1904 //
1905 // electron transport taking into account:
1906 // 1. diffusion,
1907 // 2.ExB at the wires
1908 // 3. nonisochronity
1909 //
1910 // xyz and index must be already transformed to system 1
1911 //
1912
1913 fTPCParam->Transform1to2(xyz,index);
1914
1915 //add diffusion
1916 Float_t driftl=xyz[2];
1917 if(driftl<0.01) driftl=0.01;
1918 driftl=TMath::Sqrt(driftl);
73042f01 1919 Float_t sigT = driftl*(fTPCParam->GetDiffT());
1920 Float_t sigL = driftl*(fTPCParam->GetDiffL());
1921 xyz[0]=gRandom->Gaus(xyz[0],sigT);
1922 xyz[1]=gRandom->Gaus(xyz[1],sigT);
1923 xyz[2]=gRandom->Gaus(xyz[2],sigL);
cc80f89e 1924
1925 // ExB
1926
1927 if (fTPCParam->GetMWPCReadout()==kTRUE){
1928 Float_t x1=xyz[0];
1929 fTPCParam->Transform2to2NearestWire(xyz,index);
1930 Float_t dx=xyz[0]-x1;
1931 xyz[1]+=dx*(fTPCParam->GetOmegaTau());
1932 }
1933 //add nonisochronity (not implemented yet)
1934
1283eee5 1935}
fe4da5cc 1936
fe4da5cc 1937ClassImp(AliTPCdigit)
1938
1939//_____________________________________________________________________________
1940AliTPCdigit::AliTPCdigit(Int_t *tracks, Int_t *digits):
1941 AliDigit(tracks)
1942{
1943 //
1944 // Creates a TPC digit object
1945 //
1946 fSector = digits[0];
1947 fPadRow = digits[1];
1948 fPad = digits[2];
1949 fTime = digits[3];
1950 fSignal = digits[4];
1951}
1952
1953
1954ClassImp(AliTPChit)
1955
1956//_____________________________________________________________________________
1957AliTPChit::AliTPChit(Int_t shunt, Int_t track, Int_t *vol, Float_t *hits):
1958AliHit(shunt,track)
1959{
1960 //
1961 // Creates a TPC hit object
1962 //
1963 fSector = vol[0];
1964 fPadRow = vol[1];
1965 fX = hits[0];
1966 fY = hits[1];
1967 fZ = hits[2];
1968 fQ = hits[3];
1969}
1970
8c555625 1971
39c8eb58 1972//________________________________________________________________________
1973// Additional code because of the AliTPCTrackHits
1974
2ab0c725 1975void AliTPC::MakeBranch2(Option_t *option,char *file)
39c8eb58 1976{
1977 //
1978 // Create a new branch in the current Root Tree
1979 // The branch of fHits is automatically split
1980 // MI change 14.09.2000
1981 if (fHitType&2==0) return;
1982 char branchname[10];
1983 sprintf(branchname,"%s2",GetName());
1984 //
1985 // Get the pointer to the header
5cf7bbad 1986 const char *cH = strstr(option,"H");
39c8eb58 1987 //
1988 if (fTrackHits && gAlice->TreeH() && cH) {
39c8eb58 1989 AliObjectBranch * branch = new AliObjectBranch(branchname,"AliTPCTrackHits",&fTrackHits,
1990 gAlice->TreeH(),fBufferSize,1);
1991 gAlice->TreeH()->GetListOfBranches()->Add(branch);
1992 printf("* AliDetector::MakeBranch * Making Branch %s for trackhits\n",branchname);
2ab0c725 1993 if (file) {
1994 TBranch *b = gAlice->TreeH()->GetBranch(branchname);
1995 TDirectory *wd = gDirectory;
1996 b->SetFile(file);
1997 TIter next( b->GetListOfBranches());
1998 while ((b=(TBranch*)next())) {
1999 b->SetFile(file);
2000 }
2001 wd->cd();
2002 cout << "Diverting branch " << branchname << " to file " << file << endl;
2003 }
39c8eb58 2004 }
2005}
2006
2007void AliTPC::SetTreeAddress()
2008{
2009 if (fHitType&1) AliDetector::SetTreeAddress();
2010 if (fHitType&2) SetTreeAddress2();
2011}
2012
2013void AliTPC::SetTreeAddress2()
2014{
2015 //
2016 // Set branch address for the TrackHits Tree
2017 //
2018 TBranch *branch;
2019 char branchname[20];
2020 sprintf(branchname,"%s2",GetName());
2021 //
2022 // Branch address for hit tree
2023 TTree *treeH = gAlice->TreeH();
2024 if (treeH) {
2025 branch = treeH->GetBranch(branchname);
2026 if (branch) branch->SetAddress(&fTrackHits);
2027 }
2028}
2029
2030void AliTPC::FinishPrimary()
2031{
2032 if (fTrackHits) fTrackHits->FlushHitStack();
2033}
2034
2035
2036void AliTPC::AddHit2(Int_t track, Int_t *vol, Float_t *hits)
2037{
2038 //
2039 // add hit to the list
39c8eb58 2040 Int_t rtrack;
2041 if (fIshunt) {
2042 int primary = gAlice->GetPrimary(track);
2ab0c725 2043 gAlice->Particle(primary)->SetBit(kKeepBit);
39c8eb58 2044 rtrack=primary;
2045 } else {
2046 rtrack=track;
2047 gAlice->FlagTrack(track);
2048 }
2049 //AliTPChit *hit = (AliTPChit*)fHits->UncheckedAt(fNhits-1);
2050 //if (hit->fTrack!=rtrack)
2051 // cout<<"bad track number\n";
2052 if (fTrackHits)
2053 fTrackHits->AddHitKartez(vol[0],rtrack, hits[0],
2054 hits[1],hits[2],(Int_t)hits[3]);
2055}
2056
2057void AliTPC::ResetHits()
2058{
2059 if (fHitType&1) AliDetector::ResetHits();
2060 if (fHitType&2) ResetHits2();
2061}
2062
2063void AliTPC::ResetHits2()
2064{
2065 //
2066 //reset hits
2067 if (fTrackHits) fTrackHits->Clear();
2068}
2069
2070AliHit* AliTPC::FirstHit(Int_t track)
2071{
2072 if (fHitType&2) return FirstHit2(track);
2073 return AliDetector::FirstHit(track);
2074}
2075AliHit* AliTPC::NextHit()
2076{
2077 if (fHitType&2) return NextHit2();
2078 return AliDetector::NextHit();
2079}
2080
2081AliHit* AliTPC::FirstHit2(Int_t track)
2082{
2083 //
2084 // Initialise the hit iterator
2085 // Return the address of the first hit for track
2086 // If track>=0 the track is read from disk
2087 // while if track<0 the first hit of the current
2088 // track is returned
2089 //
2090 if(track>=0) {
2091 gAlice->ResetHits();
2092 gAlice->TreeH()->GetEvent(track);
2093 }
2094 //
2095 if (fTrackHits) {
2096 fTrackHits->First();
2097 return fTrackHits->GetHit();
2098 }
2099 else return 0;
2100}
2101
2102AliHit* AliTPC::NextHit2()
2103{
2104 //
2105 //Return the next hit for the current track
2106
2107 if (fTrackHits) {
2108 fTrackHits->Next();
2109 return fTrackHits->GetHit();
2110 }
2111 else
2112 return 0;
2113}
2114
2115void AliTPC::LoadPoints(Int_t)
2116{
2117 //
2118 Int_t a = 0;
f2e8b846 2119 /* if(fHitType==1) return AliDetector::LoadPoints(a);
39c8eb58 2120 LoadPoints2(a);
f2e8b846 2121 */
2122 if(fHitType==1) AliDetector::LoadPoints(a);
2123 else LoadPoints2(a);
2124
39c8eb58 2125 // LoadPoints3(a);
2126
2127}
2128
2129
2130void AliTPC::RemapTrackHitIDs(Int_t *map)
2131{
2132 if (!fTrackHits) return;
2133 AliObjectArray * arr = fTrackHits->fTrackHitsInfo;
2134 for (UInt_t i=0;i<arr->GetSize();i++){
2135 AliTrackHitsInfo * info = (AliTrackHitsInfo *)(arr->At(i));
2136 info->fTrackID = map[info->fTrackID];
2137 }
2138
2139}
2140
2141
2142//_____________________________________________________________________________
2143void AliTPC::LoadPoints2(Int_t)
2144{
2145 //
2146 // Store x, y, z of all hits in memory
2147 //
2148 if (fTrackHits == 0) return;
2149 //
2150 Int_t nhits = fTrackHits->GetEntriesFast();
2151 if (nhits == 0) return;
2152 Int_t tracks = gAlice->GetNtrack();
2153 if (fPoints == 0) fPoints = new TObjArray(tracks);
2154 AliHit *ahit;
2155 //
2156 Int_t *ntrk=new Int_t[tracks];
2157 Int_t *limi=new Int_t[tracks];
2158 Float_t **coor=new Float_t*[tracks];
2159 for(Int_t i=0;i<tracks;i++) {
2160 ntrk[i]=0;
2161 coor[i]=0;
2162 limi[i]=0;
2163 }
2164 //
2165 AliPoints *points = 0;
2166 Float_t *fp=0;
2167 Int_t trk;
2168 Int_t chunk=nhits/4+1;
2169 //
2170 // Loop over all the hits and store their position
2171 //
2172 ahit = FirstHit2(-1);
2173 //for (Int_t hit=0;hit<nhits;hit++) {
2174 while (ahit){
2175 // ahit = (AliHit*)fHits->UncheckedAt(hit);
2176 trk=ahit->GetTrack();
2177 if(ntrk[trk]==limi[trk]) {
2178 //
2179 // Initialise a new track
2180 fp=new Float_t[3*(limi[trk]+chunk)];
2181 if(coor[trk]) {
2182 memcpy(fp,coor[trk],sizeof(Float_t)*3*limi[trk]);
2183 delete [] coor[trk];
2184 }
2185 limi[trk]+=chunk;
2186 coor[trk] = fp;
2187 } else {
2188 fp = coor[trk];
2189 }
2190 fp[3*ntrk[trk] ] = ahit->X();
2191 fp[3*ntrk[trk]+1] = ahit->Y();
2192 fp[3*ntrk[trk]+2] = ahit->Z();
2193 ntrk[trk]++;
2194 ahit = NextHit2();
2195 }
2196 //
2197 for(trk=0; trk<tracks; ++trk) {
2198 if(ntrk[trk]) {
2199 points = new AliPoints();
2200 points->SetMarkerColor(GetMarkerColor());
2201 points->SetMarkerSize(GetMarkerSize());
2202 points->SetDetector(this);
2203 points->SetParticle(trk);
2204 points->SetPolyMarker(ntrk[trk],coor[trk],GetMarkerStyle());
2205 fPoints->AddAt(points,trk);
2206 delete [] coor[trk];
2207 coor[trk]=0;
2208 }
2209 }
2210 delete [] coor;
2211 delete [] ntrk;
2212 delete [] limi;
2213}
2214
2215
2216//_____________________________________________________________________________
2217void AliTPC::LoadPoints3(Int_t)
2218{
2219 //
2220 // Store x, y, z of all hits in memory
2221 // - only intersection point with pad row
2222 if (fTrackHits == 0) return;
2223 //
2224 Int_t nhits = fTrackHits->GetEntriesFast();
2225 if (nhits == 0) return;
2226 Int_t tracks = gAlice->GetNtrack();
2227 if (fPoints == 0) fPoints = new TObjArray(2*tracks);
2228 fPoints->Expand(2*tracks);
2229 AliHit *ahit;
2230 //
2231 Int_t *ntrk=new Int_t[tracks];
2232 Int_t *limi=new Int_t[tracks];
2233 Float_t **coor=new Float_t*[tracks];
2234 for(Int_t i=0;i<tracks;i++) {
2235 ntrk[i]=0;
2236 coor[i]=0;
2237 limi[i]=0;
2238 }
2239 //
2240 AliPoints *points = 0;
2241 Float_t *fp=0;
2242 Int_t trk;
2243 Int_t chunk=nhits/4+1;
2244 //
2245 // Loop over all the hits and store their position
2246 //
2247 ahit = FirstHit2(-1);
2248 //for (Int_t hit=0;hit<nhits;hit++) {
2249
2250 Int_t lastrow = -1;
2251 while (ahit){
2252 // ahit = (AliHit*)fHits->UncheckedAt(hit);
2253 trk=ahit->GetTrack();
2254 Float_t x[3]={ahit->X(),ahit->Y(),ahit->Z()};
2255 Int_t index[3]={1,((AliTPChit*)ahit)->fSector,0};
2256 Int_t currentrow = fTPCParam->GetPadRow(x,index) ;
2257 if (currentrow!=lastrow){
2258 lastrow = currentrow;
2259 //later calculate intersection point
2260 if(ntrk[trk]==limi[trk]) {
2261 //
2262 // Initialise a new track
2263 fp=new Float_t[3*(limi[trk]+chunk)];
2264 if(coor[trk]) {
2265 memcpy(fp,coor[trk],sizeof(Float_t)*3*limi[trk]);
2266 delete [] coor[trk];
2267 }
2268 limi[trk]+=chunk;
2269 coor[trk] = fp;
2270 } else {
2271 fp = coor[trk];
2272 }
2273 fp[3*ntrk[trk] ] = ahit->X();
2274 fp[3*ntrk[trk]+1] = ahit->Y();
2275 fp[3*ntrk[trk]+2] = ahit->Z();
2276 ntrk[trk]++;
2277 }
2278 ahit = NextHit2();
2279 }
2280
2281 //
2282 for(trk=0; trk<tracks; ++trk) {
2283 if(ntrk[trk]) {
2284 points = new AliPoints();
2285 points->SetMarkerColor(GetMarkerColor()+1);
2286 points->SetMarkerStyle(5);
2287 points->SetMarkerSize(0.2);
2288 points->SetDetector(this);
2289 points->SetParticle(trk);
2290 // points->SetPolyMarker(ntrk[trk],coor[trk],GetMarkerStyle()20);
2291 points->SetPolyMarker(ntrk[trk],coor[trk],30);
2292 fPoints->AddAt(points,tracks+trk);
2293 delete [] coor[trk];
2294 coor[trk]=0;
2295 }
2296 }
2297 delete [] coor;
2298 delete [] ntrk;
2299 delete [] limi;
2300}
2301
2302
2303
2304void AliTPC::FindTrackHitsIntersection(TClonesArray * arr)
2305{
2306
2307 //
2308 //fill clones array with intersection of current point with the
2309 //middle of the row
2310 Int_t sector;
2311 Int_t ipart;
2312
2313 const Int_t kcmaxhits=30000;
2314 TVector * xxxx = new TVector(kcmaxhits*4);
2315 TVector & xxx = *xxxx;
2316 Int_t maxhits = kcmaxhits;
2317
2318 //
2319 AliTPChit * tpcHit=0;
2320 tpcHit = (AliTPChit*)FirstHit2(-1);
2321 Int_t currentIndex=0;
2322 Int_t lastrow=-1; //last writen row
2323
2324 while (tpcHit){
2325 if (tpcHit==0) continue;
2326 sector=tpcHit->fSector; // sector number
2327 ipart=tpcHit->Track();
2328
2329 //find row number
2330
2331 Float_t x[3]={tpcHit->X(),tpcHit->Y(),tpcHit->Z()};
2332 Int_t index[3]={1,sector,0};
2333 Int_t currentrow = fTPCParam->GetPadRow(x,index) ;
2334 if (currentrow<0) continue;
2335 if (lastrow<0) lastrow=currentrow;
2336 if (currentrow==lastrow){
2337 if ( currentIndex>=maxhits){
2338 maxhits+=kcmaxhits;
2339 xxx.ResizeTo(4*maxhits);
2340 }
2341 xxx(currentIndex*4)=x[0];
2342 xxx(currentIndex*4+1)=x[1];
2343 xxx(currentIndex*4+2)=x[2];
2344 xxx(currentIndex*4+3)=tpcHit->fQ;
2345 currentIndex++;
2346 }
2347 else
2348 if (currentIndex>2){
2349 Float_t sumx=0;
2350 Float_t sumx2=0;
2351 Float_t sumx3=0;
2352 Float_t sumx4=0;
2353 Float_t sumy=0;
2354 Float_t sumxy=0;
2355 Float_t sumx2y=0;
2356 Float_t sumz=0;
2357 Float_t sumxz=0;
2358 Float_t sumx2z=0;
2359 Float_t sumq=0;
2360 for (Int_t index=0;index<currentIndex;index++){
2361 Float_t x,x2,x3,x4;
2362 x=x2=x3=x4=xxx(index*4);
2363 x2*=x;
2364 x3*=x2;
2365 x4*=x3;
2366 sumx+=x;
2367 sumx2+=x2;
2368 sumx3+=x3;
2369 sumx4+=x4;
2370 sumy+=xxx(index*4+1);
2371 sumxy+=xxx(index*4+1)*x;
2372 sumx2y+=xxx(index*4+1)*x2;
2373 sumz+=xxx(index*4+2);
2374 sumxz+=xxx(index*4+2)*x;
2375 sumx2z+=xxx(index*4+2)*x2;
2376 sumq+=xxx(index*4+3);
2377 }
2378 Float_t centralPad = (fTPCParam->GetNPads(sector,lastrow)-1)/2;
2379 Float_t det=currentIndex*(sumx2*sumx4-sumx3*sumx3)-sumx*(sumx*sumx4-sumx2*sumx3)+
2380 sumx2*(sumx*sumx3-sumx2*sumx2);
2381
2382 Float_t detay=sumy*(sumx2*sumx4-sumx3*sumx3)-sumx*(sumxy*sumx4-sumx2y*sumx3)+
2383 sumx2*(sumxy*sumx3-sumx2y*sumx2);
2384 Float_t detaz=sumz*(sumx2*sumx4-sumx3*sumx3)-sumx*(sumxz*sumx4-sumx2z*sumx3)+
2385 sumx2*(sumxz*sumx3-sumx2z*sumx2);
2386
2387 Float_t detby=currentIndex*(sumxy*sumx4-sumx2y*sumx3)-sumy*(sumx*sumx4-sumx2*sumx3)+
2388 sumx2*(sumx*sumx2y-sumx2*sumxy);
2389 Float_t detbz=currentIndex*(sumxz*sumx4-sumx2z*sumx3)-sumz*(sumx*sumx4-sumx2*sumx3)+
2390 sumx2*(sumx*sumx2z-sumx2*sumxz);
2391
2392 Float_t y=detay/det+centralPad;
2393 Float_t z=detaz/det;
2394 Float_t by=detby/det; //y angle
2395 Float_t bz=detbz/det; //z angle
2396 sumy/=Float_t(currentIndex);
2397 sumz/=Float_t(currentIndex);
2398
2399 AliComplexCluster cl;
2400 cl.fX=z;
2401 cl.fY=y;
2402 cl.fQ=sumq;
2403 cl.fSigmaX2=bz;
2404 cl.fSigmaY2=by;
2405 cl.fTracks[0]=ipart;
2406
2407 AliTPCClustersRow * row = (fClustersArray->GetRow(sector,lastrow));
2408 if (row!=0) row->InsertCluster(&cl);
2409 currentIndex=0;
2410 lastrow=currentrow;
2411 } //end of calculating cluster for given row
2412
2413 } // end of loop over hits
2414 xxxx->Delete();
2415
2416
2417
2418}