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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$Log$
f74bb6f5 18Revision 1.20 2000/06/30 12:07:49 kowal2
19Updated from the TPC-PreRelease branch
20
73042f01 21Revision 1.19.2.4 2000/06/26 07:39:42 kowal2
22Changes to obey the coding rules
23
24Revision 1.19.2.3 2000/06/25 08:38:41 kowal2
25Splitted from AliTPCtracking
26
27Revision 1.19.2.2 2000/06/16 12:59:28 kowal2
28Changed parameter settings
29
30Revision 1.19.2.1 2000/06/09 07:15:07 kowal2
31
32Defaults loaded automatically (hard-wired)
33Optional parameters can be set via macro called in the constructor
34
35Revision 1.19 2000/04/18 19:00:59 fca
36Small bug fixes to TPC files
37
4d68a14a 38Revision 1.18 2000/04/17 09:37:33 kowal2
39removed obsolete AliTPCDigitsDisplay.C
40
cc80f89e 41Revision 1.17.2.2 2000/04/10 08:15:12 kowal2
42
43New, experimental data structure from M. Ivanov
44New tracking algorithm
45Different pad geometry for different sectors
46Digitization rewritten
47
48Revision 1.17.2.1 2000/04/10 07:56:53 kowal2
49Not used anymore - removed
50
51Revision 1.17 2000/01/19 17:17:30 fca
52Introducing a list of lists of hits -- more hits allowed for detector now
53
1cedd08a 54Revision 1.16 1999/11/05 09:29:23 fca
55Accept only signals > 0
56
921bf71a 57Revision 1.15 1999/10/08 06:26:53 fca
58Removed ClustersIndex - not used anymore
59
e674b993 60Revision 1.14 1999/09/29 09:24:33 fca
61Introduction of the Copyright and cvs Log
62
4c039060 63*/
64
fe4da5cc 65///////////////////////////////////////////////////////////////////////////////
66// //
67// Time Projection Chamber //
68// This class contains the basic functions for the Time Projection Chamber //
69// detector. Functions specific to one particular geometry are //
70// contained in the derived classes //
71// //
72//Begin_Html
73/*
1439f98e 74<img src="picts/AliTPCClass.gif">
fe4da5cc 75*/
76//End_Html
77// //
8c555625 78// //
fe4da5cc 79///////////////////////////////////////////////////////////////////////////////
80
73042f01 81//
82
fe4da5cc 83#include <TMath.h>
84#include <TRandom.h>
85#include <TVector.h>
8c555625 86#include <TMatrix.h>
fe4da5cc 87#include <TGeometry.h>
88#include <TNode.h>
89#include <TTUBS.h>
90#include <TObjectTable.h>
1578254f 91#include "TParticle.h"
fe4da5cc 92#include "AliTPC.h"
73042f01 93#include <TFile.h>
fe4da5cc 94#include "AliRun.h"
95#include <iostream.h>
96#include <fstream.h>
97#include "AliMC.h"
98
cc80f89e 99
73042f01 100#include "AliTPCParamSR.h"
8c555625 101#include "AliTPCPRF2D.h"
102#include "AliTPCRF1D.h"
cc80f89e 103#include "AliDigits.h"
104#include "AliSimDigits.h"
105
106#include "AliTPCDigitsArray.h"
107#include "AliCluster.h"
108#include "AliClusters.h"
109#include "AliTPCClustersRow.h"
110#include "AliTPCClustersArray.h"
8c555625 111
73042f01 112#include "AliTPCcluster.h"
113#include "AliTPCclusterer.h"
114#include "AliTPCtracker.h"
8c555625 115
73042f01 116#include <TInterpreter.h>
1283eee5 117
fe4da5cc 118ClassImp(AliTPC)
119
120//_____________________________________________________________________________
121AliTPC::AliTPC()
122{
123 //
124 // Default constructor
125 //
126 fIshunt = 0;
fe4da5cc 127 fHits = 0;
128 fDigits = 0;
fe4da5cc 129 fNsectors = 0;
cc80f89e 130 //MI changes
131 fDigitsArray = 0;
132 fClustersArray = 0;
73042f01 133 fTPCParam=0;
fe4da5cc 134}
135
136//_____________________________________________________________________________
137AliTPC::AliTPC(const char *name, const char *title)
138 : AliDetector(name,title)
139{
140 //
141 // Standard constructor
142 //
143
144 //
145 // Initialise arrays of hits and digits
146 fHits = new TClonesArray("AliTPChit", 176);
4d68a14a 147 gAlice->AddHitList(fHits);
cc80f89e 148 //MI change
149 fDigitsArray = 0;
150 fClustersArray= 0;
fe4da5cc 151 //
152 // Initialise counters
cc80f89e 153 fNsectors = 0;
cc80f89e 154
fe4da5cc 155 //
156 fIshunt = 0;
157 //
158 // Initialise color attributes
159 SetMarkerColor(kYellow);
73042f01 160
161 //
162 // Set TPC parameters
163 //
164
165 if (!strcmp(title,"Default")) {
166 fTPCParam = new AliTPCParamSR;
167 } else {
168 cerr<<"AliTPC warning: in Config.C you must set non-default parameters\n";
169 fTPCParam=0;
170 }
171
fe4da5cc 172}
173
174//_____________________________________________________________________________
175AliTPC::~AliTPC()
176{
177 //
178 // TPC destructor
179 //
73042f01 180
fe4da5cc 181 fIshunt = 0;
182 delete fHits;
183 delete fDigits;
73042f01 184 delete fTPCParam;
fe4da5cc 185}
186
fe4da5cc 187//_____________________________________________________________________________
188void AliTPC::AddHit(Int_t track, Int_t *vol, Float_t *hits)
189{
190 //
191 // Add a hit to the list
192 //
193 TClonesArray &lhits = *fHits;
194 new(lhits[fNhits++]) AliTPChit(fIshunt,track,vol,hits);
195}
196
fe4da5cc 197//_____________________________________________________________________________
198void AliTPC::BuildGeometry()
199{
cc80f89e 200
fe4da5cc 201 //
202 // Build TPC ROOT TNode geometry for the event display
203 //
73042f01 204 TNode *nNode, *nTop;
fe4da5cc 205 TTUBS *tubs;
206 Int_t i;
207 const int kColorTPC=19;
1283eee5 208 char name[5], title[25];
fe4da5cc 209 const Double_t kDegrad=TMath::Pi()/180;
1283eee5 210 const Double_t kRaddeg=180./TMath::Pi();
211
1283eee5 212
73042f01 213 Float_t innerOpenAngle = fTPCParam->GetInnerAngle();
214 Float_t outerOpenAngle = fTPCParam->GetOuterAngle();
1283eee5 215
73042f01 216 Float_t innerAngleShift = fTPCParam->GetInnerAngleShift();
217 Float_t outerAngleShift = fTPCParam->GetOuterAngleShift();
1283eee5 218
219 Int_t nLo = fTPCParam->GetNInnerSector()/2;
220 Int_t nHi = fTPCParam->GetNOuterSector()/2;
221
73042f01 222 const Double_t kloAng = (Double_t)TMath::Nint(innerOpenAngle*kRaddeg);
223 const Double_t khiAng = (Double_t)TMath::Nint(outerOpenAngle*kRaddeg);
224 const Double_t kloAngSh = (Double_t)TMath::Nint(innerAngleShift*kRaddeg);
225 const Double_t khiAngSh = (Double_t)TMath::Nint(outerAngleShift*kRaddeg);
1283eee5 226
227
73042f01 228 const Double_t kloCorr = 1/TMath::Cos(0.5*kloAng*kDegrad);
229 const Double_t khiCorr = 1/TMath::Cos(0.5*khiAng*kDegrad);
1283eee5 230
231 Double_t rl,ru;
232
233
fe4da5cc 234 //
235 // Get ALICE top node
fe4da5cc 236 //
1283eee5 237
73042f01 238 nTop=gAlice->GetGeometry()->GetNode("alice");
1283eee5 239
240 // inner sectors
241
cc80f89e 242 rl = fTPCParam->GetInnerRadiusLow();
243 ru = fTPCParam->GetInnerRadiusUp();
1283eee5 244
245
fe4da5cc 246 for(i=0;i<nLo;i++) {
247 sprintf(name,"LS%2.2d",i);
1283eee5 248 name[4]='\0';
249 sprintf(title,"TPC low sector %3d",i);
250 title[24]='\0';
251
73042f01 252 tubs = new TTUBS(name,title,"void",rl*kloCorr,ru*kloCorr,250.,
253 kloAng*(i-0.5)+kloAngSh,kloAng*(i+0.5)+kloAngSh);
fe4da5cc 254 tubs->SetNumberOfDivisions(1);
73042f01 255 nTop->cd();
256 nNode = new TNode(name,title,name,0,0,0,"");
257 nNode->SetLineColor(kColorTPC);
258 fNodes->Add(nNode);
fe4da5cc 259 }
1283eee5 260
fe4da5cc 261 // Outer sectors
1283eee5 262
cc80f89e 263 rl = fTPCParam->GetOuterRadiusLow();
264 ru = fTPCParam->GetOuterRadiusUp();
1283eee5 265
fe4da5cc 266 for(i=0;i<nHi;i++) {
267 sprintf(name,"US%2.2d",i);
1283eee5 268 name[4]='\0';
fe4da5cc 269 sprintf(title,"TPC upper sector %d",i);
1283eee5 270 title[24]='\0';
73042f01 271 tubs = new TTUBS(name,title,"void",rl*khiCorr,ru*khiCorr,250,
272 khiAng*(i-0.5)+khiAngSh,khiAng*(i+0.5)+khiAngSh);
fe4da5cc 273 tubs->SetNumberOfDivisions(1);
73042f01 274 nTop->cd();
275 nNode = new TNode(name,title,name,0,0,0,"");
276 nNode->SetLineColor(kColorTPC);
277 fNodes->Add(nNode);
fe4da5cc 278 }
cc80f89e 279
73042f01 280}
1283eee5 281
fe4da5cc 282//_____________________________________________________________________________
283Int_t AliTPC::DistancetoPrimitive(Int_t , Int_t )
284{
285 //
286 // Calculate distance from TPC to mouse on the display
287 // Dummy procedure
288 //
289 return 9999;
290}
291
73042f01 292void AliTPC::Clusters2Tracks(TFile *of) {
3c0f9266 293 //-----------------------------------------------------------------
294 // This is a track finder.
3c0f9266 295 //-----------------------------------------------------------------
73042f01 296 AliTPCtracker::Clusters2Tracks(fTPCParam,of);
fe4da5cc 297}
298
299//_____________________________________________________________________________
300void AliTPC::CreateMaterials()
301{
8c555625 302 //-----------------------------------------------
fe4da5cc 303 // Create Materials for for TPC
8c555625 304 //-----------------------------------------------
305
306 //-----------------------------------------------------------------
307 // Origin: Marek Kowalski IFJ, Krakow, Marek.Kowalski@ifj.edu.pl
308 //-----------------------------------------------------------------
1283eee5 309
73042f01 310 Int_t iSXFLD=gAlice->Field()->Integ();
311 Float_t sXMGMX=gAlice->Field()->Max();
1283eee5 312
313 Float_t amat[5]; // atomic numbers
314 Float_t zmat[5]; // z
315 Float_t wmat[5]; // proportions
316
317 Float_t density;
318
319 // ********************* Gases *******************
320
321 //--------------------------------------------------------------
322 // pure gases
323 //--------------------------------------------------------------
324
325 // Ne
326
327
73042f01 328 Float_t aNe = 20.18;
329 Float_t zNe = 10.;
fe4da5cc 330
1283eee5 331 density = 0.0009;
332
73042f01 333 AliMaterial(20,"Ne",aNe,zNe,density,999.,999.);
1283eee5 334
335 // Ar
336
73042f01 337 Float_t aAr = 39.948;
338 Float_t zAr = 18.;
1283eee5 339
340 density = 0.001782;
341
73042f01 342 AliMaterial(21,"Ar",aAr,zAr,density,999.,999.);
1283eee5 343
73042f01 344 Float_t aPure[2];
fe4da5cc 345
73042f01 346 aPure[0] = aNe;
347 aPure[1] = aAr;
fe4da5cc 348
1283eee5 349
350 //--------------------------------------------------------------
351 // gases - compounds
352 //--------------------------------------------------------------
353
354 Float_t amol[3];
355
356 // CO2
357
358 amat[0]=12.011;
359 amat[1]=15.9994;
360
361 zmat[0]=6.;
362 zmat[1]=8.;
363
364 wmat[0]=1.;
365 wmat[1]=2.;
366
367 density=0.001977;
368
369 amol[0] = amat[0]*wmat[0]+amat[1]*wmat[1];
370
371 AliMixture(10,"CO2",amat,zmat,density,-2,wmat);
372
373 // CF4
374
375 amat[0]=12.011;
376 amat[1]=18.998;
377
378 zmat[0]=6.;
379 zmat[1]=9.;
380
381 wmat[0]=1.;
382 wmat[1]=4.;
383
384 density=0.003034;
385
386 amol[1] = amat[0]*wmat[0]+amat[1]*wmat[1];
387
388 AliMixture(11,"CF4",amat,zmat,density,-2,wmat);
389
390 // CH4
391
392 amat[0]=12.011;
393 amat[1]=1.;
394
395 zmat[0]=6.;
396 zmat[1]=1.;
397
398 wmat[0]=1.;
399 wmat[1]=4.;
400
401 density=0.000717;
402
403 amol[2] = amat[0]*wmat[0]+amat[1]*wmat[1];
404
405 AliMixture(12,"CH4",amat,zmat,density,-2,wmat);
406
407 //----------------------------------------------------------------
408 // gases - mixtures, ID >= 20 pure gases, <= 10 ID < 20 -compounds
409 //----------------------------------------------------------------
410
fe4da5cc 411 char namate[21];
1283eee5 412
413 density = 0.;
414 Float_t am=0;
415 Int_t nc;
416
73042f01 417 Float_t a,z,rho,absl,x0,buf[1];
1283eee5 418 Int_t nbuf;
419
420 for(nc = 0;nc<fNoComp;nc++)
421 {
422
423 // retrive material constants
424
73042f01 425 gMC->Gfmate((*fIdmate)[fMixtComp[nc]],namate,a,z,rho,x0,absl,buf,nbuf);
1283eee5 426
427 amat[nc] = a;
428 zmat[nc] = z;
429
430 Int_t nnc = (fMixtComp[nc]>=20) ? fMixtComp[nc]%20 : fMixtComp[nc]%10;
431
73042f01 432 am += fMixtProp[nc]*((fMixtComp[nc]>=20) ? aPure[nnc] : amol[nnc]);
1283eee5 433 density += fMixtProp[nc]*rho; // density of the mixture
434
435 }
436
437 // mixture proportions by weight!
438
439 for(nc = 0;nc<fNoComp;nc++)
440 {
441
442 Int_t nnc = (fMixtComp[nc]>=20) ? fMixtComp[nc]%20 : fMixtComp[nc]%10;
443
73042f01 444 wmat[nc] = fMixtProp[nc]*((fMixtComp[nc]>=20) ? aPure[nnc] : amol[nnc])/am;
1283eee5 445
446 }
fe4da5cc 447
1283eee5 448 AliMixture(31,"Drift gas 1",amat,zmat,density,fNoComp,wmat);
449 AliMixture(32,"Drift gas 2",amat,zmat,density,fNoComp,wmat);
450 AliMixture(33,"Drift gas 3",amat,zmat,density,fNoComp,wmat);
451
73042f01 452 AliMedium(2, "Drift gas 1", 31, 0, iSXFLD, sXMGMX, 10., 999.,.1, .001, .001);
453 AliMedium(3, "Drift gas 2", 32, 0, iSXFLD, sXMGMX, 10., 999.,.1, .001, .001);
454 AliMedium(4, "Drift gas 3", 33, 1, iSXFLD, sXMGMX, 10., 999.,.1, .001, .001);
1283eee5 455
456 // Air
457
458 AliMaterial(24, "Air", 14.61, 7.3, .001205, 30420., 67500.);
459
73042f01 460 AliMedium(24, "Air", 24, 0, iSXFLD, sXMGMX, 10., .1, .1, .1, .1);
1283eee5 461
462 //----------------------------------------------------------------------
463 // solid materials
464 //----------------------------------------------------------------------
465
466 // Al
467
468 AliMaterial(30, "Al", 26.98, 13., 2.7, 8.9, 37.2);
469
73042f01 470 AliMedium(0, "Al",30, 0, iSXFLD, sXMGMX, 10., .1, .1, .1, .1);
1283eee5 471
472 // Si
473
474 AliMaterial(31, "Si", 28.086, 14.,2.33, 9.36, 999.);
475
73042f01 476 AliMedium(7, "Al",31, 0, iSXFLD, sXMGMX, 10., .1, .1, .1, .1);
fe4da5cc 477
1283eee5 478
479 // Mylar C5H4O2
480
481 amat[0]=12.011;
482 amat[1]=1.;
483 amat[2]=15.9994;
484
485 zmat[0]=6.;
486 zmat[1]=1.;
487 zmat[2]=8.;
488
489 wmat[0]=5.;
490 wmat[1]=4.;
491 wmat[2]=2.;
492
493 density = 1.39;
fe4da5cc 494
1283eee5 495 AliMixture(32, "Mylar",amat,zmat,density,-3,wmat);
496
73042f01 497 AliMedium(5, "Mylar",32, 0, iSXFLD, sXMGMX, 10., .1, .1, .001, .01);
1283eee5 498
499
500
501
502 // Carbon (normal)
503
504 AliMaterial(33,"C normal",12.011,6.,2.265,18.8,999.);
505
73042f01 506 AliMedium(6,"C normal",33,0, iSXFLD, sXMGMX, 10., .1, .1, .001, .01);
1283eee5 507
508 // G10 for inner and outr field cage
509 // G10 is 60% SiO2 + 40% epoxy, right now I use A and Z for SiO2
510
511 Float_t rhoFactor;
512
513 amat[0]=28.086;
514 amat[1]=15.9994;
515
516 zmat[0]=14.;
517 zmat[1]=8.;
518
519 wmat[0]=1.;
520 wmat[1]=2.;
521
522 density = 1.7;
fe4da5cc 523
1283eee5 524
525 AliMixture(34,"G10 aux.",amat,zmat,density,-2,wmat);
526
527
73042f01 528 gMC->Gfmate((*fIdmate)[34],namate,a,z,rho,x0,absl,buf,nbuf);
1283eee5 529
530 Float_t thickX0 = 0.0052; // field cage in X0 units
fe4da5cc 531
1283eee5 532 Float_t thick = 2.; // in cm
533
73042f01 534 x0=19.4; // G10
1283eee5 535
73042f01 536 rhoFactor = x0*thickX0/thick;
1283eee5 537 density = rho*rhoFactor;
538
539 AliMaterial(35,"G10-fc",a,z,density,999.,999.);
540
73042f01 541 AliMedium(8,"G10-fc",35,0, iSXFLD, sXMGMX, 10., .1, .1, .001, .01);
1283eee5 542
543 thickX0 = 0.0027; // inner vessel (eta <0.9)
544 thick=0.5;
73042f01 545 rhoFactor = x0*thickX0/thick;
1283eee5 546 density = rho*rhoFactor;
547
548 AliMaterial(36,"G10-iv",a,z,density,999.,999.);
549
73042f01 550 AliMedium(9,"G10-iv",36,0, iSXFLD, sXMGMX, 10., .1, .1, .001, .01);
1283eee5 551
552 // Carbon fibre
fe4da5cc 553
73042f01 554 gMC->Gfmate((*fIdmate)[33],namate,a,z,rho,x0,absl,buf,nbuf);
1283eee5 555
556 thickX0 = 0.0133; // outer vessel
557 thick=3.0;
73042f01 558 rhoFactor = x0*thickX0/thick;
1283eee5 559 density = rho*rhoFactor;
560
561
562 AliMaterial(37,"C-ov",a,z,density,999.,999.);
563
73042f01 564 AliMedium(10,"C-ov",37,0, iSXFLD, sXMGMX, 10., .1, .1, .001, .01);
1283eee5 565
566 thickX0=0.015; // inner vessel (cone, eta > 0.9)
567 thick=1.5;
73042f01 568 rhoFactor = x0*thickX0/thick;
1283eee5 569 density = rho*rhoFactor;
570
571 AliMaterial(38,"C-ivc",a,z,density,999.,999.);
572
73042f01 573 AliMedium(11,"C-ivc",38,0, iSXFLD, sXMGMX, 10., .1, .1, .001, .01);
1283eee5 574
575 //
576
73042f01 577 AliMedium(12,"CO2",10,0, iSXFLD, sXMGMX, 10., 999.,.1, .001, .001);
1283eee5 578
fe4da5cc 579}
580
fe4da5cc 581
73042f01 582void AliTPC::Digits2Clusters(TFile *of)
fe4da5cc 583{
3c0f9266 584 //-----------------------------------------------------------------
585 // This is a simple cluster finder.
3c0f9266 586 //-----------------------------------------------------------------
73042f01 587 AliTPCclusterer::Digits2Clusters(fTPCParam,of);
fe4da5cc 588}
589
73042f01 590extern Double_t SigmaY2(Double_t, Double_t, Double_t);
591extern Double_t SigmaZ2(Double_t, Double_t);
fe4da5cc 592//_____________________________________________________________________________
73042f01 593void AliTPC::Hits2Clusters(TFile *of)
fe4da5cc 594{
8c555625 595 //--------------------------------------------------------
fe4da5cc 596 // TPC simple cluster generator from hits
597 // obtained from the TPC Fast Simulator
8c555625 598 // The point errors are taken from the parametrization
599 //--------------------------------------------------------
600
601 //-----------------------------------------------------------------
602 // Origin: Marek Kowalski IFJ, Krakow, Marek.Kowalski@ifj.edu.pl
603 //-----------------------------------------------------------------
73042f01 604 // Adopted to Marian's cluster data structure by I.Belikov, CERN,
605 // Jouri.Belikov@cern.ch
606 //----------------------------------------------------------------
607
608 /////////////////////////////////////////////////////////////////////////////
609 //
610 //---------------------------------------------------------------------
611 // ALICE TPC Cluster Parameters
612 //--------------------------------------------------------------------
613
614
615
616 // Cluster width in rphi
617 const Float_t kACrphi=0.18322;
618 const Float_t kBCrphi=0.59551e-3;
619 const Float_t kCCrphi=0.60952e-1;
620 // Cluster width in z
621 const Float_t kACz=0.19081;
622 const Float_t kBCz=0.55938e-3;
623 const Float_t kCCz=0.30428;
624
625 TDirectory *savedir=gDirectory;
626
627 if (!of->IsOpen()) {
628 cerr<<"AliTPC::Hits2Clusters(): output file not open !\n";
629 return;
630 }
3c0f9266 631
cc80f89e 632 if(fTPCParam == 0){
633 printf("AliTPCParam MUST be created firstly\n");
634 return;
635 }
636
73042f01 637 Float_t sigmaRphi,sigmaZ,clRphi,clZ;
fe4da5cc 638 //
1578254f 639 TParticle *particle; // pointer to a given particle
fe4da5cc 640 AliTPChit *tpcHit; // pointer to a sigle TPC hit
73042f01 641 TClonesArray *particles; //pointer to the particle list
fe4da5cc 642 Int_t sector,nhits;
643 Int_t ipart;
644 Float_t xyz[5];
645 Float_t pl,pt,tanth,rpad,ratio;
fe4da5cc 646 Float_t cph,sph;
647
648 //---------------------------------------------------------------
649 // Get the access to the tracks
650 //---------------------------------------------------------------
651
73042f01 652 TTree *tH = gAlice->TreeH();
653 Stat_t ntracks = tH->GetEntries();
654 particles=gAlice->Particles();
655
656 //Switch to the output file
657 of->cd();
658
659 fTPCParam->Write(fTPCParam->GetTitle());
660 AliTPCClustersArray carray;
661 carray.Setup(fTPCParam);
662 carray.SetClusterType("AliTPCcluster");
663 carray.MakeTree();
664
665 Int_t nclusters=0; //cluster counter
fe4da5cc 666
667 //------------------------------------------------------------
cc80f89e 668 // Loop over all sectors (72 sectors for 20 deg
669 // segmentation for both lower and upper sectors)
670 // Sectors 0-35 are lower sectors, 0-17 z>0, 17-35 z<0
3c0f9266 671 // Sectors 36-71 are upper sectors, 36-53 z>0, 54-71 z<0
fe4da5cc 672 //
3c0f9266 673 // First cluster for sector 0 starts at "0"
fe4da5cc 674 //------------------------------------------------------------
cc80f89e 675
676 for(Int_t isec=0;isec<fTPCParam->GetNSector();isec++){
8c555625 677 //MI change
cc80f89e 678 fTPCParam->AdjustCosSin(isec,cph,sph);
fe4da5cc 679
680 //------------------------------------------------------------
681 // Loop over tracks
682 //------------------------------------------------------------
683
684 for(Int_t track=0;track<ntracks;track++){
685 ResetHits();
73042f01 686 tH->GetEvent(track);
fe4da5cc 687 //
73042f01 688 // Get number of the TPC hits
fe4da5cc 689 //
690 nhits=fHits->GetEntriesFast();
fe4da5cc 691 //
692 // Loop over hits
693 //
694 for(Int_t hit=0;hit<nhits;hit++){
695 tpcHit=(AliTPChit*)fHits->UncheckedAt(hit);
cc80f89e 696 if (tpcHit->fQ == 0.) continue; //information about track (I.Belikov)
fe4da5cc 697 sector=tpcHit->fSector; // sector number
698 if(sector != isec) continue; //terminate iteration
699 ipart=tpcHit->fTrack;
73042f01 700 particle=(TParticle*)particles->UncheckedAt(ipart);
1578254f 701 pl=particle->Pz();
702 pt=particle->Pt();
fe4da5cc 703 if(pt < 1.e-9) pt=1.e-9;
704 tanth=pl/pt;
705 tanth = TMath::Abs(tanth);
706 rpad=TMath::Sqrt(tpcHit->fX*tpcHit->fX + tpcHit->fY*tpcHit->fY);
707 ratio=0.001*rpad/pt; // pt must be in MeV/c - historical reason
73042f01 708
fe4da5cc 709 // space-point resolutions
710
73042f01 711 sigmaRphi=SigmaY2(rpad,tanth,pt);
712 sigmaZ =SigmaZ2(rpad,tanth );
fe4da5cc 713
714 // cluster widths
715
73042f01 716 clRphi=kACrphi-kBCrphi*rpad*tanth+kCCrphi*ratio*ratio;
717 clZ=kACz-kBCz*rpad*tanth+kCCz*tanth*tanth;
fe4da5cc 718
719 // temporary protection
720
73042f01 721 if(sigmaRphi < 0.) sigmaRphi=0.4e-3;
722 if(sigmaZ < 0.) sigmaZ=0.4e-3;
723 if(clRphi < 0.) clRphi=2.5e-3;
724 if(clZ < 0.) clZ=2.5e-5;
fe4da5cc 725
726 //
cc80f89e 727
728 //
729 // smearing --> rotate to the 1 (13) or to the 25 (49) sector,
fe4da5cc 730 // then the inaccuracy in a X-Y plane is only along Y (pad row)!
731 //
73042f01 732 Float_t xprim= tpcHit->fX*cph + tpcHit->fY*sph;
fe4da5cc 733 Float_t yprim=-tpcHit->fX*sph + tpcHit->fY*cph;
73042f01 734 xyz[0]=gRandom->Gaus(yprim,TMath::Sqrt(sigmaRphi)); // y
735 Float_t alpha=(isec < fTPCParam->GetNInnerSector()) ?
736 fTPCParam->GetInnerAngle() : fTPCParam->GetOuterAngle();
737 Float_t ymax=xprim*TMath::Tan(0.5*alpha);
738 if (TMath::Abs(xyz[0])>ymax) xyz[0]=yprim;
739 xyz[1]=gRandom->Gaus(tpcHit->fZ,TMath::Sqrt(sigmaZ)); // z
740 if (TMath::Abs(xyz[1])>fTPCParam->GetZLength()) xyz[1]=tpcHit->fZ;
cc80f89e 741 xyz[2]=tpcHit->fQ; // q
73042f01 742 xyz[3]=sigmaRphi; // fSigmaY2
743 xyz[4]=sigmaZ; // fSigmaZ2
744
745 AliTPCClustersRow *clrow=carray.GetRow(sector,tpcHit->fPadRow);
746 if (!clrow) clrow=carray.CreateRow(sector,tpcHit->fPadRow);
747
748 Int_t tracks[3]={tpcHit->fTrack, -1, -1};
749 AliTPCcluster cluster(xyz,tracks);
750
751 clrow->InsertCluster(&cluster); nclusters++;
752
fe4da5cc 753 } // end of loop over hits
73042f01 754
755 } // end of loop over tracks
756
757 Int_t nrows=fTPCParam->GetNRow(isec);
758 for (Int_t irow=0; irow<nrows; irow++) {
759 AliTPCClustersRow *clrow=carray.GetRow(isec,irow);
760 if (!clrow) continue;
761 carray.StoreRow(isec,irow);
762 carray.ClearRow(isec,irow);
763 }
764
cc80f89e 765 } // end of loop over sectors
73042f01 766
767 cerr<<"Number of made clusters : "<<nclusters<<" \n";
768
769 carray.GetTree()->Write();
770
771 savedir->cd(); //switch back to the input file
cc80f89e 772
773} // end of function
774
775//_________________________________________________________________
776void AliTPC::Hits2ExactClustersSector(Int_t isec)
777{
778 //--------------------------------------------------------
779 //calculate exact cross point of track and given pad row
780 //resulting values are expressed in "digit" coordinata
781 //--------------------------------------------------------
782
783 //-----------------------------------------------------------------
784 // Origin: Marian Ivanov GSI Darmstadt, m.ivanov@gsi.de
785 //-----------------------------------------------------------------
786 //
787 if (fClustersArray==0){
788 return;
789 }
790 //
791 TParticle *particle; // pointer to a given particle
792 AliTPChit *tpcHit; // pointer to a sigle TPC hit
73042f01 793 TClonesArray *particles; //pointer to the particle list
cc80f89e 794 Int_t sector,nhits;
795 Int_t ipart;
73042f01 796 const Int_t kcmaxhits=30000;
797 TVector * xxxx = new TVector(kcmaxhits*4);
cc80f89e 798 TVector & xxx = *xxxx;
73042f01 799 Int_t maxhits = kcmaxhits;
cc80f89e 800 //construct array for each padrow
801 for (Int_t i=0; i<fTPCParam->GetNRow(isec);i++)
802 fClustersArray->CreateRow(isec,i);
fe4da5cc 803
cc80f89e 804 //---------------------------------------------------------------
805 // Get the access to the tracks
806 //---------------------------------------------------------------
807
73042f01 808 TTree *tH = gAlice->TreeH();
809 Stat_t ntracks = tH->GetEntries();
810 particles=gAlice->Particles();
811 Int_t npart = particles->GetEntriesFast();
cc80f89e 812
813 //------------------------------------------------------------
814 // Loop over tracks
815 //------------------------------------------------------------
fe4da5cc 816
cc80f89e 817 for(Int_t track=0;track<ntracks;track++){
818 ResetHits();
73042f01 819 tH->GetEvent(track);
cc80f89e 820 //
821 // Get number of the TPC hits and a pointer
822 // to the particles
823 //
824 nhits=fHits->GetEntriesFast();
825 //
826 // Loop over hits
827 //
828 Int_t currentIndex=0;
829 Int_t lastrow=-1; //last writen row
830 for(Int_t hit=0;hit<nhits;hit++){
831 tpcHit=(AliTPChit*)fHits->UncheckedAt(hit);
832 if (tpcHit==0) continue;
833 sector=tpcHit->fSector; // sector number
834 if(sector != isec) continue;
835 ipart=tpcHit->fTrack;
73042f01 836 if (ipart<npart) particle=(TParticle*)particles->UncheckedAt(ipart);
cc80f89e 837
838 //find row number
839
840 Float_t x[3]={tpcHit->fX,tpcHit->fY,tpcHit->fZ};
841 Int_t index[3]={1,isec,0};
842 Int_t currentrow = fTPCParam->GetPadRow(x,index) ;
843 if (currentrow<0) continue;
844 if (lastrow<0) lastrow=currentrow;
845 if (currentrow==lastrow){
846 if ( currentIndex>=maxhits){
73042f01 847 maxhits+=kcmaxhits;
cc80f89e 848 xxx.ResizeTo(4*maxhits);
849 }
850 xxx(currentIndex*4)=x[0];
851 xxx(currentIndex*4+1)=x[1];
852 xxx(currentIndex*4+2)=x[2];
853 xxx(currentIndex*4+3)=tpcHit->fQ;
854 currentIndex++;
855 }
856 else
857 if (currentIndex>2){
858 Float_t sumx=0;
859 Float_t sumx2=0;
860 Float_t sumx3=0;
861 Float_t sumx4=0;
862 Float_t sumy=0;
863 Float_t sumxy=0;
864 Float_t sumx2y=0;
865 Float_t sumz=0;
866 Float_t sumxz=0;
867 Float_t sumx2z=0;
868 Float_t sumq=0;
869 for (Int_t index=0;index<currentIndex;index++){
870 Float_t x,x2,x3,x4;
871 x=x2=x3=x4=xxx(index*4);
872 x2*=x;
873 x3*=x2;
874 x4*=x3;
875 sumx+=x;
876 sumx2+=x2;
877 sumx3+=x3;
878 sumx4+=x4;
879 sumy+=xxx(index*4+1);
880 sumxy+=xxx(index*4+1)*x;
881 sumx2y+=xxx(index*4+1)*x2;
882 sumz+=xxx(index*4+2);
883 sumxz+=xxx(index*4+2)*x;
884 sumx2z+=xxx(index*4+2)*x2;
885 sumq+=xxx(index*4+3);
886 }
73042f01 887 Float_t centralPad = (fTPCParam->GetNPads(isec,lastrow)-1)/2;
cc80f89e 888 Float_t det=currentIndex*(sumx2*sumx4-sumx3*sumx3)-sumx*(sumx*sumx4-sumx2*sumx3)+
889 sumx2*(sumx*sumx3-sumx2*sumx2);
890
891 Float_t detay=sumy*(sumx2*sumx4-sumx3*sumx3)-sumx*(sumxy*sumx4-sumx2y*sumx3)+
892 sumx2*(sumxy*sumx3-sumx2y*sumx2);
893 Float_t detaz=sumz*(sumx2*sumx4-sumx3*sumx3)-sumx*(sumxz*sumx4-sumx2z*sumx3)+
894 sumx2*(sumxz*sumx3-sumx2z*sumx2);
895
896 Float_t detby=currentIndex*(sumxy*sumx4-sumx2y*sumx3)-sumy*(sumx*sumx4-sumx2*sumx3)+
897 sumx2*(sumx*sumx2y-sumx2*sumxy);
898 Float_t detbz=currentIndex*(sumxz*sumx4-sumx2z*sumx3)-sumz*(sumx*sumx4-sumx2*sumx3)+
899 sumx2*(sumx*sumx2z-sumx2*sumxz);
900
73042f01 901 Float_t y=detay/det+centralPad;
cc80f89e 902 Float_t z=detaz/det;
903 Float_t by=detby/det; //y angle
904 Float_t bz=detbz/det; //z angle
905 sumy/=Float_t(currentIndex);
906 sumz/=Float_t(currentIndex);
907 AliCluster cl;
908 cl.fX=z;
909 cl.fY=y;
910 cl.fQ=sumq;
911 cl.fSigmaX2=bz;
912 cl.fSigmaY2=by;
913 cl.fTracks[0]=ipart;
914
915 AliTPCClustersRow * row = (fClustersArray->GetRow(isec,lastrow));
916 if (row!=0) row->InsertCluster(&cl);
917 currentIndex=0;
918 lastrow=currentrow;
919 } //end of calculating cluster for given row
920
921
922
923 } // end of loop over hits
924 } // end of loop over tracks
925 //write padrows to tree
926 for (Int_t ii=0; ii<fTPCParam->GetNRow(isec);ii++) {
927 fClustersArray->StoreRow(isec,ii);
928 fClustersArray->ClearRow(isec,ii);
929 }
930 xxxx->Delete();
931
fe4da5cc 932}
933
cc80f89e 934//__________________________________________________________________
8c555625 935void AliTPC::Hits2Digits()
936{
8c555625 937 //----------------------------------------------------
cc80f89e 938 // Loop over all sectors
939 //----------------------------------------------------
940
941 if(fTPCParam == 0){
942 printf("AliTPCParam MUST be created firstly\n");
943 return;
944 }
945
946 for(Int_t isec=0;isec<fTPCParam->GetNSector();isec++) Hits2DigitsSector(isec);
947
8c555625 948}
949
950
fe4da5cc 951//_____________________________________________________________________________
8c555625 952void AliTPC::Hits2DigitsSector(Int_t isec)
fe4da5cc 953{
8c555625 954 //-------------------------------------------------------------------
fe4da5cc 955 // TPC conversion from hits to digits.
8c555625 956 //-------------------------------------------------------------------
957
958 //-----------------------------------------------------------------
959 // Origin: Marek Kowalski IFJ, Krakow, Marek.Kowalski@ifj.edu.pl
960 //-----------------------------------------------------------------
961
fe4da5cc 962 //-------------------------------------------------------
8c555625 963 // Get the access to the track hits
fe4da5cc 964 //-------------------------------------------------------
8c555625 965
cc80f89e 966
73042f01 967 TTree *tH = gAlice->TreeH(); // pointer to the hits tree
968 Stat_t ntracks = tH->GetEntries();
8c555625 969
970 if( ntracks > 0){
971
972 //-------------------------------------------
973 // Only if there are any tracks...
974 //-------------------------------------------
975
8c555625 976 TObjArray **row;
fe4da5cc 977
8c555625 978 printf("*** Processing sector number %d ***\n",isec);
979
980 Int_t nrows =fTPCParam->GetNRow(isec);
981
982 row= new TObjArray* [nrows];
fe4da5cc 983
73042f01 984 MakeSector(isec,nrows,tH,ntracks,row);
8c555625 985
986 //--------------------------------------------------------
987 // Digitize this sector, row by row
988 // row[i] is the pointer to the TObjArray of TVectors,
989 // each one containing electrons accepted on this
990 // row, assigned into tracks
991 //--------------------------------------------------------
992
993 Int_t i;
994
cc80f89e 995 if (fDigitsArray->GetTree()==0) fDigitsArray->MakeTree();
8c555625 996
cc80f89e 997 for (i=0;i<nrows;i++){
8c555625 998
cc80f89e 999 AliDigits * dig = fDigitsArray->CreateRow(isec,i);
8c555625 1000
cc80f89e 1001 DigitizeRow(i,isec,row);
8c555625 1002
cc80f89e 1003 fDigitsArray->StoreRow(isec,i);
8c555625 1004
73042f01 1005 Int_t ndig = dig->GetDigitSize();
cc80f89e 1006
1007 printf("*** Sector, row, compressed digits %d %d %d ***\n",isec,i,ndig);
1008
1009 fDigitsArray->ClearRow(isec,i);
8c555625 1010
cc80f89e 1011
8c555625 1012 } // end of the sector digitization
8c555625 1013
cc80f89e 1014 for(i=0;i<nrows;i++){
1015 row[i]->Delete();
1016 }
1017
8c555625 1018 delete [] row; // delete the array of pointers to TObjArray-s
1019
1020 } // ntracks >0
8c555625 1021
cc80f89e 1022} // end of Hits2DigitsSector
8c555625 1023
8c555625 1024
8c555625 1025//_____________________________________________________________________________
cc80f89e 1026void AliTPC::DigitizeRow(Int_t irow,Int_t isec,TObjArray **rows)
8c555625 1027{
1028 //-----------------------------------------------------------
1029 // Single row digitization, coupling from the neighbouring
1030 // rows taken into account
1031 //-----------------------------------------------------------
1032
1033 //-----------------------------------------------------------------
1034 // Origin: Marek Kowalski IFJ, Krakow, Marek.Kowalski@ifj.edu.pl
cc80f89e 1035 // Modified: Marian Ivanov GSI Darmstadt, m.ivanov@gsi.de
8c555625 1036 //-----------------------------------------------------------------
1037
1038
8c555625 1039 Float_t zerosup = fTPCParam->GetZeroSup();
1040 Int_t nrows =fTPCParam->GetNRow(isec);
cc80f89e 1041 fCurrentIndex[1]= isec;
8c555625 1042
8c555625 1043
73042f01 1044 Int_t nofPads = fTPCParam->GetNPads(isec,irow);
1045 Int_t nofTbins = fTPCParam->GetMaxTBin();
1046 Int_t indexRange[4];
8c555625 1047 //
1048 // Integrated signal for this row
1049 // and a single track signal
cc80f89e 1050 //
73042f01 1051 TMatrix *m1 = new TMatrix(0,nofPads,0,nofTbins); // integrated
1052 TMatrix *m2 = new TMatrix(0,nofPads,0,nofTbins); // single
8c555625 1053 //
73042f01 1054 TMatrix &total = *m1;
8c555625 1055
1056 // Array of pointers to the label-signal list
1057
73042f01 1058 Int_t nofDigits = nofPads*nofTbins; // number of digits for this row
1059 Float_t **pList = new Float_t* [nofDigits];
8c555625 1060
1061 Int_t lp;
cc80f89e 1062 Int_t i1;
73042f01 1063 for(lp=0;lp<nofDigits;lp++)pList[lp]=0; // set all pointers to NULL
8c555625 1064 //
cc80f89e 1065 //calculate signal
1066 //
1067 Int_t row1 = TMath::Max(irow-fTPCParam->GetNCrossRows(),0);
1068 Int_t row2 = TMath::Min(irow+fTPCParam->GetNCrossRows(),nrows-1);
1069 for (Int_t row= row1;row<=row2;row++){
1070 Int_t nTracks= rows[row]->GetEntries();
1071 for (i1=0;i1<nTracks;i1++){
1072 fCurrentIndex[2]= row;
1073 fCurrentIndex[3]=irow;
1074 if (row==irow){
1075 m2->Zero(); // clear single track signal matrix
73042f01 1076 Float_t trackLabel = GetSignal(rows[row],i1,m2,m1,indexRange);
1077 GetList(trackLabel,nofPads,m2,indexRange,pList);
cc80f89e 1078 }
73042f01 1079 else GetSignal(rows[row],i1,0,m1,indexRange);
cc80f89e 1080 }
8c555625 1081 }
cc80f89e 1082
8c555625 1083 Int_t tracks[3];
8c555625 1084
cc80f89e 1085 AliDigits *dig = fDigitsArray->GetRow(isec,irow);
73042f01 1086 for(Int_t ip=0;ip<nofPads;ip++){
1087 for(Int_t it=0;it<nofTbins;it++){
8c555625 1088
73042f01 1089 Float_t q = total(ip,it);
8c555625 1090
73042f01 1091 Int_t gi =it*nofPads+ip; // global index
8c555625 1092
cc80f89e 1093 q = gRandom->Gaus(q,fTPCParam->GetNoise()*fTPCParam->GetNoiseNormFac());
8c555625 1094
cc80f89e 1095 q = (Int_t)q;
1096
1097 if(q <=zerosup) continue; // do not fill zeros
73042f01 1098 if(q > fTPCParam->GetADCSat()) q = fTPCParam->GetADCSat(); // saturation
8c555625 1099
1100 //
1101 // "real" signal or electronic noise (list = -1)?
1102 //
1103
1104 for(Int_t j1=0;j1<3;j1++){
1105 tracks[j1] = (pList[gi]) ?(Int_t)(*(pList[gi]+j1)) : -1;
1106 }
1107
cc80f89e 1108//Begin_Html
1109/*
1110 <A NAME="AliDigits"></A>
1111 using of AliDigits object
1112*/
1113//End_Html
1114 dig->SetDigitFast((Short_t)q,it,ip);
1115 if (fDigitsArray->IsSimulated())
1116 {
1117 ((AliSimDigits*)dig)->SetTrackIDFast(tracks[0],it,ip,0);
1118 ((AliSimDigits*)dig)->SetTrackIDFast(tracks[1],it,ip,1);
1119 ((AliSimDigits*)dig)->SetTrackIDFast(tracks[2],it,ip,2);
1120 }
1121
8c555625 1122
1123 } // end of loop over time buckets
1124 } // end of lop over pads
1125
1126 //
1127 // This row has been digitized, delete nonused stuff
1128 //
1129
73042f01 1130 for(lp=0;lp<nofDigits;lp++){
8c555625 1131 if(pList[lp]) delete [] pList[lp];
1132 }
1133
1134 delete [] pList;
1135
1136 delete m1;
1137 delete m2;
cc80f89e 1138 // delete m3;
8c555625 1139
1140} // end of DigitizeRow
cc80f89e 1141
8c555625 1142//_____________________________________________________________________________
cc80f89e 1143
1144Float_t AliTPC::GetSignal(TObjArray *p1, Int_t ntr, TMatrix *m1, TMatrix *m2,
73042f01 1145 Int_t *indexRange)
8c555625 1146{
1147
1148 //---------------------------------------------------------------
1149 // Calculates 2-D signal (pad,time) for a single track,
1150 // returns a pointer to the signal matrix and the track label
1151 // No digitization is performed at this level!!!
1152 //---------------------------------------------------------------
1153
1154 //-----------------------------------------------------------------
1155 // Origin: Marek Kowalski IFJ, Krakow, Marek.Kowalski@ifj.edu.pl
cc80f89e 1156 // Modified: Marian Ivanov
8c555625 1157 //-----------------------------------------------------------------
1158
1159 TVector *tv;
8c555625 1160
8c555625 1161 tv = (TVector*)p1->At(ntr); // pointer to a track
1162 TVector &v = *tv;
1163
1164 Float_t label = v(0);
73042f01 1165 Int_t centralPad = (fTPCParam->GetNPads(fCurrentIndex[1],fCurrentIndex[3])-1)/2;
8c555625 1166
8c555625 1167 Int_t nElectrons = (tv->GetNrows()-1)/4;
73042f01 1168 indexRange[0]=9999; // min pad
1169 indexRange[1]=-1; // max pad
1170 indexRange[2]=9999; //min time
1171 indexRange[3]=-1; // max time
8c555625 1172
cc80f89e 1173 // Float_t IneffFactor = 0.5; // inefficiency in the gain close to the edge, as above
1174
1175 TMatrix &signal = *m1;
1176 TMatrix &total = *m2;
8c555625 1177 //
1178 // Loop over all electrons
1179 //
8c555625 1180 for(Int_t nel=0; nel<nElectrons; nel++){
cc80f89e 1181 Int_t idx=nel*4;
1182 Float_t aval = v(idx+4);
1183 Float_t eltoadcfac=aval*fTPCParam->GetTotalNormFac();
1184 Float_t xyz[3]={v(idx+1),v(idx+2),v(idx+3)};
1185 Int_t n = fTPCParam->CalcResponse(xyz,fCurrentIndex,fCurrentIndex[3]);
8c555625 1186
cc80f89e 1187 if (n>0) for (Int_t i =0; i<n; i++){
1188 Int_t *index = fTPCParam->GetResBin(i);
73042f01 1189 Int_t pad=index[1]+centralPad; //in digit coordinates central pad has coordinate 0
cc80f89e 1190 if ( ( pad<(fTPCParam->GetNPads(fCurrentIndex[1],fCurrentIndex[3]))) && (pad>0)) {
1191 Int_t time=index[2];
1192 Float_t weight = fTPCParam->GetResWeight(i); //we normalise response to ADC channel
1193 weight *= eltoadcfac;
1194
1195 if (m1!=0) signal(pad,time)+=weight;
1196 total(pad,time)+=weight;
73042f01 1197 indexRange[0]=TMath::Min(indexRange[0],pad);
1198 indexRange[1]=TMath::Max(indexRange[1],pad);
1199 indexRange[2]=TMath::Min(indexRange[2],time);
1200 indexRange[3]=TMath::Max(indexRange[3],time);
cc80f89e 1201 }
1202 }
8c555625 1203 } // end of loop over electrons
cc80f89e 1204
8c555625 1205 return label; // returns track label when finished
1206}
1207
1208//_____________________________________________________________________________
73042f01 1209void AliTPC::GetList(Float_t label,Int_t np,TMatrix *m,Int_t *indexRange,
8c555625 1210 Float_t **pList)
1211{
1212 //----------------------------------------------------------------------
1213 // Updates the list of tracks contributing to digits for a given row
1214 //----------------------------------------------------------------------
1215
1216 //-----------------------------------------------------------------
1217 // Origin: Marek Kowalski IFJ, Krakow, Marek.Kowalski@ifj.edu.pl
1218 //-----------------------------------------------------------------
1219
1220 TMatrix &signal = *m;
1221
1222 // lop over nonzero digits
1223
73042f01 1224 for(Int_t it=indexRange[2];it<indexRange[3]+1;it++){
1225 for(Int_t ip=indexRange[0];ip<indexRange[1]+1;ip++){
8c555625 1226
1227
921bf71a 1228 // accept only the contribution larger than 500 electrons (1/2 s_noise)
1229
cc80f89e 1230 if(signal(ip,it)<0.5) continue;
921bf71a 1231
1232
73042f01 1233 Int_t globalIndex = it*np+ip; // globalIndex starts from 0!
8c555625 1234
73042f01 1235 if(!pList[globalIndex]){
8c555625 1236
1237 //
1238 // Create new list (6 elements - 3 signals and 3 labels),
8c555625 1239 //
1240
73042f01 1241 pList[globalIndex] = new Float_t [6];
8c555625 1242
1243 // set list to -1
1244
73042f01 1245 *pList[globalIndex] = -1.;
1246 *(pList[globalIndex]+1) = -1.;
1247 *(pList[globalIndex]+2) = -1.;
1248 *(pList[globalIndex]+3) = -1.;
1249 *(pList[globalIndex]+4) = -1.;
1250 *(pList[globalIndex]+5) = -1.;
8c555625 1251
1252
73042f01 1253 *pList[globalIndex] = label;
1254 *(pList[globalIndex]+3) = signal(ip,it);
8c555625 1255 }
1256 else{
1257
1258 // check the signal magnitude
1259
73042f01 1260 Float_t highest = *(pList[globalIndex]+3);
1261 Float_t middle = *(pList[globalIndex]+4);
1262 Float_t lowest = *(pList[globalIndex]+5);
8c555625 1263
1264 //
1265 // compare the new signal with already existing list
1266 //
1267
1268 if(signal(ip,it)<lowest) continue; // neglect this track
1269
1270 //
1271
1272 if (signal(ip,it)>highest){
73042f01 1273 *(pList[globalIndex]+5) = middle;
1274 *(pList[globalIndex]+4) = highest;
1275 *(pList[globalIndex]+3) = signal(ip,it);
8c555625 1276
73042f01 1277 *(pList[globalIndex]+2) = *(pList[globalIndex]+1);
1278 *(pList[globalIndex]+1) = *pList[globalIndex];
1279 *pList[globalIndex] = label;
8c555625 1280 }
1281 else if (signal(ip,it)>middle){
73042f01 1282 *(pList[globalIndex]+5) = middle;
1283 *(pList[globalIndex]+4) = signal(ip,it);
8c555625 1284
73042f01 1285 *(pList[globalIndex]+2) = *(pList[globalIndex]+1);
1286 *(pList[globalIndex]+1) = label;
8c555625 1287 }
1288 else{
73042f01 1289 *(pList[globalIndex]+5) = signal(ip,it);
1290 *(pList[globalIndex]+2) = label;
8c555625 1291 }
1292 }
1293
1294 } // end of loop over pads
1295 } // end of loop over time bins
1296
1297
1298
8c555625 1299}//end of GetList
1300//___________________________________________________________________
1301void AliTPC::MakeSector(Int_t isec,Int_t nrows,TTree *TH,
1302 Stat_t ntracks,TObjArray **row)
1303{
1304
1305 //-----------------------------------------------------------------
1306 // Prepares the sector digitization, creates the vectors of
1307 // tracks for each row of this sector. The track vector
1308 // contains the track label and the position of electrons.
1309 //-----------------------------------------------------------------
1310
1311 //-----------------------------------------------------------------
1312 // Origin: Marek Kowalski IFJ, Krakow, Marek.Kowalski@ifj.edu.pl
1313 //-----------------------------------------------------------------
1314
cc80f89e 1315 Float_t gasgain = fTPCParam->GetGasGain();
8c555625 1316 Int_t i;
cc80f89e 1317 Float_t xyz[4];
8c555625 1318
1319 AliTPChit *tpcHit; // pointer to a sigle TPC hit
1320
1321 //----------------------------------------------
1322 // Create TObjArray-s, one for each row,
1323 // each TObjArray will store the TVectors
1324 // of electrons, one TVector per each track.
1325 //----------------------------------------------
1326
f74bb6f5 1327 Int_t *nofElectrons = new Int_t [nrows]; // electron counter for each row
1328 TVector **tracks = new TVector* [nrows]; //pointers to the track vectors
8c555625 1329 for(i=0; i<nrows; i++){
1330 row[i] = new TObjArray;
f74bb6f5 1331 nofElectrons[i]=0;
1332 tracks[i]=0;
8c555625 1333 }
8c555625 1334
1335 //--------------------------------------------------------------------
1336 // Loop over tracks, the "track" contains the full history
1337 //--------------------------------------------------------------------
1338
1339 Int_t previousTrack,currentTrack;
1340 previousTrack = -1; // nothing to store so far!
1341
1342 for(Int_t track=0;track<ntracks;track++){
1343
1344 ResetHits();
1345
1346 TH->GetEvent(track); // get next track
1347 Int_t nhits = fHits->GetEntriesFast(); // get number of hits for this track
1348
1349 if(nhits == 0) continue; // no hits in the TPC for this track
1350
1351 //--------------------------------------------------------------
1352 // Loop over hits
1353 //--------------------------------------------------------------
1354
1355 for(Int_t hit=0;hit<nhits;hit++){
1356
1357 tpcHit = (AliTPChit*)fHits->UncheckedAt(hit); // get a pointer to a hit
1358
1359 Int_t sector=tpcHit->fSector; // sector number
cc80f89e 1360 if(sector != isec) continue;
8c555625 1361
1362 currentTrack = tpcHit->fTrack; // track number
1363 if(currentTrack != previousTrack){
1364
1365 // store already filled fTrack
1366
1367 for(i=0;i<nrows;i++){
1368 if(previousTrack != -1){
73042f01 1369 if(nofElectrons[i]>0){
cc80f89e 1370 TVector &v = *tracks[i];
8c555625 1371 v(0) = previousTrack;
73042f01 1372 tracks[i]->ResizeTo(4*nofElectrons[i]+1); // shrink if necessary
cc80f89e 1373 row[i]->Add(tracks[i]);
8c555625 1374 }
1375 else{
cc80f89e 1376 delete tracks[i]; // delete empty TVector
1377 tracks[i]=0;
8c555625 1378 }
1379 }
1380
73042f01 1381 nofElectrons[i]=0;
cc80f89e 1382 tracks[i] = new TVector(481); // TVectors for the next fTrack
8c555625 1383
1384 } // end of loop over rows
1385
1386 previousTrack=currentTrack; // update track label
1387 }
1388
73042f01 1389 Int_t qI = (Int_t) (tpcHit->fQ); // energy loss (number of electrons)
8c555625 1390
1391 //---------------------------------------------------
1392 // Calculate the electron attachment probability
1393 //---------------------------------------------------
1394
cc80f89e 1395
1396 Float_t time = 1.e6*(fTPCParam->GetZLength()-TMath::Abs(tpcHit->fZ))
1397 /fTPCParam->GetDriftV();
8c555625 1398 // in microseconds!
73042f01 1399 Float_t attProb = fTPCParam->GetAttCoef()*
8c555625 1400 fTPCParam->GetOxyCont()*time; // fraction!
1401
1402 //-----------------------------------------------
1403 // Loop over electrons
1404 //-----------------------------------------------
cc80f89e 1405 Int_t index[3];
1406 index[1]=isec;
73042f01 1407 for(Int_t nel=0;nel<qI;nel++){
8c555625 1408 // skip if electron lost due to the attachment
73042f01 1409 if((gRandom->Rndm(0)) < attProb) continue; // electron lost!
8c555625 1410 xyz[0]=tpcHit->fX;
1411 xyz[1]=tpcHit->fY;
cc80f89e 1412 xyz[2]=tpcHit->fZ;
1413 xyz[3]= (Float_t) (-gasgain*TMath::Log(gRandom->Rndm()));
1414 index[0]=1;
1415
1416 TransportElectron(xyz,index); //MI change -august
73042f01 1417 Int_t rowNumber;
cc80f89e 1418 fTPCParam->GetPadRow(xyz,index); //MI change august
73042f01 1419 rowNumber = index[2];
cc80f89e 1420 //transform position to local digit coordinates
1421 //relative to nearest pad row
73042f01 1422 if ((rowNumber<0)||rowNumber>=fTPCParam->GetNRow(isec)) continue;
1423 nofElectrons[rowNumber]++;
8c555625 1424 //----------------------------------
1425 // Expand vector if necessary
1426 //----------------------------------
73042f01 1427 if(nofElectrons[rowNumber]>120){
1428 Int_t range = tracks[rowNumber]->GetNrows();
1429 if((nofElectrons[rowNumber])>(range-1)/4){
cc80f89e 1430
73042f01 1431 tracks[rowNumber]->ResizeTo(range+400); // Add 100 electrons
fe4da5cc 1432 }
1433 }
1434
73042f01 1435 TVector &v = *tracks[rowNumber];
1436 Int_t idx = 4*nofElectrons[rowNumber]-3;
8c555625 1437
cc80f89e 1438 v(idx)= xyz[0]; // X - pad row coordinate
1439 v(idx+1)=xyz[1]; // Y - pad coordinate (along the pad-row)
1440 v(idx+2)=xyz[2]; // Z - time bin coordinate
1441 v(idx+3)=xyz[3]; // avalanche size
8c555625 1442 } // end of loop over electrons
1443
1444 } // end of loop over hits
1445 } // end of loop over tracks
1446
1447 //
1448 // store remaining track (the last one) if not empty
1449 //
1450
1451 for(i=0;i<nrows;i++){
73042f01 1452 if(nofElectrons[i]>0){
cc80f89e 1453 TVector &v = *tracks[i];
8c555625 1454 v(0) = previousTrack;
73042f01 1455 tracks[i]->ResizeTo(4*nofElectrons[i]+1); // shrink if necessary
cc80f89e 1456 row[i]->Add(tracks[i]);
fe4da5cc 1457 }
1458 else{
cc80f89e 1459 delete tracks[i];
1460 tracks[i]=0;
8c555625 1461 }
1462 }
1463
cc80f89e 1464 delete [] tracks;
73042f01 1465 delete [] nofElectrons;
8c555625 1466
8c555625 1467
cc80f89e 1468} // end of MakeSector
8c555625 1469
fe4da5cc 1470
1471//_____________________________________________________________________________
1472void AliTPC::Init()
1473{
1474 //
1475 // Initialise TPC detector after definition of geometry
1476 //
1477 Int_t i;
1478 //
1479 printf("\n");
1480 for(i=0;i<35;i++) printf("*");
1481 printf(" TPC_INIT ");
1482 for(i=0;i<35;i++) printf("*");
1483 printf("\n");
1484 //
1485 for(i=0;i<80;i++) printf("*");
1486 printf("\n");
1487}
1488
1489//_____________________________________________________________________________
1490void AliTPC::MakeBranch(Option_t* option)
1491{
1492 //
1493 // Create Tree branches for the TPC.
1494 //
1495 Int_t buffersize = 4000;
1496 char branchname[10];
1497 sprintf(branchname,"%s",GetName());
1498
1499 AliDetector::MakeBranch(option);
1500
73042f01 1501 char *d = strstr(option,"D");
fe4da5cc 1502
73042f01 1503 if (fDigits && gAlice->TreeD() && d) {
fe4da5cc 1504 gAlice->TreeD()->Branch(branchname,&fDigits, buffersize);
1505 printf("Making Branch %s for digits\n",branchname);
1506 }
fe4da5cc 1507}
1508
1509//_____________________________________________________________________________
1510void AliTPC::ResetDigits()
1511{
1512 //
1513 // Reset number of digits and the digits array for this detector
fe4da5cc 1514 //
1515 fNdigits = 0;
cc80f89e 1516 if (fDigits) fDigits->Clear();
fe4da5cc 1517}
1518
1519//_____________________________________________________________________________
1520void AliTPC::SetSecAL(Int_t sec)
1521{
8c555625 1522 //---------------------------------------------------
fe4da5cc 1523 // Activate/deactivate selection for lower sectors
8c555625 1524 //---------------------------------------------------
1525
1526 //-----------------------------------------------------------------
1527 // Origin: Marek Kowalski IFJ, Krakow, Marek.Kowalski@ifj.edu.pl
1528 //-----------------------------------------------------------------
1529
fe4da5cc 1530 fSecAL = sec;
1531}
1532
1533//_____________________________________________________________________________
1534void AliTPC::SetSecAU(Int_t sec)
1535{
8c555625 1536 //----------------------------------------------------
fe4da5cc 1537 // Activate/deactivate selection for upper sectors
8c555625 1538 //---------------------------------------------------
1539
1540 //-----------------------------------------------------------------
1541 // Origin: Marek Kowalski IFJ, Krakow, Marek.Kowalski@ifj.edu.pl
1542 //-----------------------------------------------------------------
1543
fe4da5cc 1544 fSecAU = sec;
1545}
1546
1547//_____________________________________________________________________________
1548void AliTPC::SetSecLows(Int_t s1,Int_t s2,Int_t s3,Int_t s4,Int_t s5, Int_t s6)
1549{
8c555625 1550 //----------------------------------------
fe4da5cc 1551 // Select active lower sectors
8c555625 1552 //----------------------------------------
1553
1554 //-----------------------------------------------------------------
1555 // Origin: Marek Kowalski IFJ, Krakow, Marek.Kowalski@ifj.edu.pl
1556 //-----------------------------------------------------------------
1557
fe4da5cc 1558 fSecLows[0] = s1;
1559 fSecLows[1] = s2;
1560 fSecLows[2] = s3;
1561 fSecLows[3] = s4;
1562 fSecLows[4] = s5;
1563 fSecLows[5] = s6;
1564}
1565
1566//_____________________________________________________________________________
1567void AliTPC::SetSecUps(Int_t s1,Int_t s2,Int_t s3,Int_t s4,Int_t s5, Int_t s6,
1568 Int_t s7, Int_t s8 ,Int_t s9 ,Int_t s10,
1569 Int_t s11 , Int_t s12)
1570{
8c555625 1571 //--------------------------------
fe4da5cc 1572 // Select active upper sectors
8c555625 1573 //--------------------------------
1574
1575 //-----------------------------------------------------------------
1576 // Origin: Marek Kowalski IFJ, Krakow, Marek.Kowalski@ifj.edu.pl
1577 //-----------------------------------------------------------------
1578
fe4da5cc 1579 fSecUps[0] = s1;
1580 fSecUps[1] = s2;
1581 fSecUps[2] = s3;
1582 fSecUps[3] = s4;
1583 fSecUps[4] = s5;
1584 fSecUps[5] = s6;
1585 fSecUps[6] = s7;
1586 fSecUps[7] = s8;
1587 fSecUps[8] = s9;
1588 fSecUps[9] = s10;
1589 fSecUps[10] = s11;
1590 fSecUps[11] = s12;
1591}
1592
1593//_____________________________________________________________________________
1594void AliTPC::SetSens(Int_t sens)
1595{
8c555625 1596
1597 //-------------------------------------------------------------
1598 // Activates/deactivates the sensitive strips at the center of
1599 // the pad row -- this is for the space-point resolution calculations
1600 //-------------------------------------------------------------
1601
1602 //-----------------------------------------------------------------
1603 // Origin: Marek Kowalski IFJ, Krakow, Marek.Kowalski@ifj.edu.pl
1604 //-----------------------------------------------------------------
1605
fe4da5cc 1606 fSens = sens;
1607}
4b0fdcad 1608
73042f01 1609void AliTPC::SetSide(Float_t side=0.)
4b0fdcad 1610{
73042f01 1611 // choice of the TPC side
1612
4b0fdcad 1613 fSide = side;
1614
1615}
1283eee5 1616//____________________________________________________________________________
1617void AliTPC::SetGasMixt(Int_t nc,Int_t c1,Int_t c2,Int_t c3,Float_t p1,
1618 Float_t p2,Float_t p3)
1619{
fe4da5cc 1620
73042f01 1621 // gax mixture definition
1622
1283eee5 1623 fNoComp = nc;
1624
1625 fMixtComp[0]=c1;
1626 fMixtComp[1]=c2;
1627 fMixtComp[2]=c3;
1628
1629 fMixtProp[0]=p1;
1630 fMixtProp[1]=p2;
1631 fMixtProp[2]=p3;
1632
1633
cc80f89e 1634}
1635//_____________________________________________________________________________
1636
1637void AliTPC::TransportElectron(Float_t *xyz, Int_t *index)
1638{
1639 //
1640 // electron transport taking into account:
1641 // 1. diffusion,
1642 // 2.ExB at the wires
1643 // 3. nonisochronity
1644 //
1645 // xyz and index must be already transformed to system 1
1646 //
1647
1648 fTPCParam->Transform1to2(xyz,index);
1649
1650 //add diffusion
1651 Float_t driftl=xyz[2];
1652 if(driftl<0.01) driftl=0.01;
1653 driftl=TMath::Sqrt(driftl);
73042f01 1654 Float_t sigT = driftl*(fTPCParam->GetDiffT());
1655 Float_t sigL = driftl*(fTPCParam->GetDiffL());
1656 xyz[0]=gRandom->Gaus(xyz[0],sigT);
1657 xyz[1]=gRandom->Gaus(xyz[1],sigT);
1658 xyz[2]=gRandom->Gaus(xyz[2],sigL);
cc80f89e 1659
1660 // ExB
1661
1662 if (fTPCParam->GetMWPCReadout()==kTRUE){
1663 Float_t x1=xyz[0];
1664 fTPCParam->Transform2to2NearestWire(xyz,index);
1665 Float_t dx=xyz[0]-x1;
1666 xyz[1]+=dx*(fTPCParam->GetOmegaTau());
1667 }
1668 //add nonisochronity (not implemented yet)
1669
1283eee5 1670}
fe4da5cc 1671//_____________________________________________________________________________
1672void AliTPC::Streamer(TBuffer &R__b)
1673{
1674 //
1675 // Stream an object of class AliTPC.
1676 //
1677 if (R__b.IsReading()) {
1678 Version_t R__v = R__b.ReadVersion(); if (R__v) { }
1679 AliDetector::Streamer(R__b);
1680 if (R__v < 2) return;
1681 R__b >> fNsectors;
fe4da5cc 1682 } else {
1683 R__b.WriteVersion(AliTPC::IsA());
1684 AliDetector::Streamer(R__b);
1685 R__b << fNsectors;
fe4da5cc 1686 }
1687}
1688
fe4da5cc 1689ClassImp(AliTPCdigit)
1690
1691//_____________________________________________________________________________
1692AliTPCdigit::AliTPCdigit(Int_t *tracks, Int_t *digits):
1693 AliDigit(tracks)
1694{
1695 //
1696 // Creates a TPC digit object
1697 //
1698 fSector = digits[0];
1699 fPadRow = digits[1];
1700 fPad = digits[2];
1701 fTime = digits[3];
1702 fSignal = digits[4];
1703}
1704
1705
1706ClassImp(AliTPChit)
1707
1708//_____________________________________________________________________________
1709AliTPChit::AliTPChit(Int_t shunt, Int_t track, Int_t *vol, Float_t *hits):
1710AliHit(shunt,track)
1711{
1712 //
1713 // Creates a TPC hit object
1714 //
1715 fSector = vol[0];
1716 fPadRow = vol[1];
1717 fX = hits[0];
1718 fY = hits[1];
1719 fZ = hits[2];
1720 fQ = hits[3];
1721}
1722
8c555625 1723