T0/AliT0Reconstructor.cxx

   1
   2 /**************************************************************************
   3  * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
   4  *                                                                        *
   5  * Author: The ALICE Off-line Project.                                    *
   6  * Contributors are mentioned in the code where appropriate.              *
   7  *                                                                        *
   8  * Permission to use, copy, modify and distribute this software and its   *
   9  * documentation strictly for non-commercial purposes is hereby granted   *
  10  * without fee, provided that the above copyright notice appears in all   *
  11  * copies and that both the copyright notice and this permission notice   *
  12  * appear in the supporting documentation. The authors make no claims     *
  13  * about the suitability of this software for any purpose. It is          *
  14  * provided "as is" without express or implied warranty.                  *
  15  **************************************************************************/
  16
  17 /* $Id$ */
  18 /*********************************************************************
  19  *  T0 reconstruction and filling ESD
  20  *  - reconstruct mean time (interation time)
  21  *  - vertex position
  22  *  -  multiplicity
  23  ********************************************************************/
  24
  25 #include <AliESDEvent.h>
  26 #include "AliLog.h"
  27 #include "AliT0RecPoint.h"
  28 #include "AliRawReader.h"
  29 #include "AliT0RawReader.h"
  30 #include "AliT0digit.h"
  31 #include "AliT0Reconstructor.h"
  32 #include "AliT0Parameters.h"
  33 #include "AliT0Calibrator.h"
  34 #include "AliESDfriend.h"
  35 #include "AliESDTZEROfriend.h"
  36 #include "AliLog.h"
  37 #include "AliCDBEntry.h"
  38 #include "AliCDBManager.h"
  39 #include "AliCTPTimeParams.h"
  40 #include "AliLHCClockPhase.h"
  41 #include "AliT0CalibSeasonTimeShift.h"
  42
  43 #include <TArrayI.h>
  44 #include <TGraph.h>
  45 #include <TMath.h>
  46 #include <Riostream.h>
  47
  48 ClassImp(AliT0Reconstructor)
  49
  50   AliT0Reconstructor:: AliT0Reconstructor(): AliReconstructor(),
  51                                              fdZonA(0),
  52                                              fdZonC(0),
  53                                              fZposition(0),
  54                                              fParam(NULL),
  55                                              fAmpLEDrec(),
  56                                              fQTC(0),
  57                                              fAmpLED(0),
  58                                              fCalib(),
  59                                              fLatencyHPTDC(9000),
  60                                              fLatencyL1(0),
  61                                              fLatencyL1A(0),
  62                                              fLatencyL1C(0),
  63                                              fGRPdelays(0),
  64                                              fTimeMeanShift(0x0),
  65                                              fTimeSigmaShift(0x0),
  66                                              fESDTZEROfriend(NULL)
  67
  68 {
  69   //constructor
  70   AliCDBEntry *entry = AliCDBManager::Instance()->Get("GRP/CTP/CTPtiming");
  71   if (!entry) AliFatal("CTP timing parameters are not found in OCDB !");
  72   AliCTPTimeParams *ctpParams = (AliCTPTimeParams*)entry->GetObject();
  73   Float_t l1Delay = (Float_t)ctpParams->GetDelayL1L0()*25.0;
  74
  75   AliCDBEntry *entry1 = AliCDBManager::Instance()->Get("GRP/CTP/TimeAlign");
  76   if (!entry1) AliFatal("CTP time-alignment is not found in OCDB !");
  77   AliCTPTimeParams *ctpTimeAlign = (AliCTPTimeParams*)entry1->GetObject();
  78   l1Delay += ((Float_t)ctpTimeAlign->GetDelayL1L0()*25.0);
  79
  80   AliCDBEntry *entry4 = AliCDBManager::Instance()->Get("GRP/Calib/LHCClockPhase");
  81   if (!entry4) AliFatal("LHC clock-phase shift is not found in OCDB !");
  82   AliLHCClockPhase *phase = (AliLHCClockPhase*)entry4->GetObject();
  83
  84   fGRPdelays = l1Delay - phase->GetMeanPhase();
  85
  86   AliCDBEntry *entry5 = AliCDBManager::Instance()->Get("T0/Calib/TimeAdjust");
  87   if (entry5) {
  88     AliT0CalibSeasonTimeShift *timeshift = (AliT0CalibSeasonTimeShift*)entry5->GetObject();
  89     fTimeMeanShift = timeshift->GetT0Means();
  90     fTimeSigmaShift  = timeshift->GetT0Sigmas();
  91      timeshift->Print();
  92   }
  93   else
  94     AliWarning("Time Adjust is not found in OCDB !");
  95
  96   fParam = AliT0Parameters::Instance();
  97   fParam->Init();
  98
  99   for (Int_t i=0; i<24; i++){
 100         TGraph* gr = fParam ->GetAmpLEDRec(i);
 101         if (gr) fAmpLEDrec.AddAtAndExpand(gr,i) ;
 102           TGraph* gr1 = fParam ->GetAmpLED(i);
 103           if (gr1) fAmpLED.AddAtAndExpand(gr1,i) ;
 104           TGraph* gr2 = fParam ->GetQTC(i);
 105           if (gr2) fQTC.AddAtAndExpand(gr2,i) ;
 106   }
 107
 108   fLatencyL1 = fParam->GetLatencyL1();
 109   fLatencyL1A = fParam->GetLatencyL1A();
 110   fLatencyL1C = fParam->GetLatencyL1C();
 111   fLatencyHPTDC = fParam->GetLatencyHPTDC();
 112   AliDebug(2,Form(" LatencyL1 %f latencyL1A %f latencyL1C %f latencyHPTDC %f \n",fLatencyL1, fLatencyL1A, fLatencyL1C, fLatencyHPTDC));
 113
 114   // fdZonC = TMath::Abs(fParam->GetZPositionShift("T0/C/PMT1"));
 115   //fdZonA = TMath::Abs(fParam->GetZPositionShift("T0/A/PMT15"));
 116   //here real Z position
 117   fdZonC = TMath::Abs(fParam->GetZPosition("T0/C/PMT1"));
 118   fdZonA = TMath::Abs(fParam->GetZPosition("T0/A/PMT15"));
 119
 120   fCalib = new AliT0Calibrator();
 121   fESDTZEROfriend = new AliESDTZEROfriend();
 122
 123 }
 124
 125 //_____________________________________________________________________________
 126 void AliT0Reconstructor::Reconstruct(TTree*digitsTree, TTree*clustersTree) const
 127
 128 {
 129   // T0 digits reconstruction
 130   Int_t refAmp = Int_t (GetRecoParam()->GetRefAmp());
 131
 132   TArrayI * timeCFD = new TArrayI(24);
 133   TArrayI * timeLED = new TArrayI(24);
 134   TArrayI * chargeQT0 = new TArrayI(24);
 135   TArrayI * chargeQT1 = new TArrayI(24);
 136
 137
 138   Float_t channelWidth = fParam->GetChannelWidth() ;
 139   Float_t meanVertex = fParam->GetMeanVertex();
 140   Float_t c = 0.0299792; // cm/ps
 141   Double32_t vertex = 9999999;
 142   Double32_t timeDiff=999999, meanTime=999999, timeclock=999999;
 143
 144
 145   AliDebug(1,Form("Start DIGITS reconstruction "));
 146
 147
 148   TBranch *brDigits=digitsTree->GetBranch("T0");
 149   AliT0digit *fDigits = new AliT0digit() ;
 150   if (brDigits) {
 151     brDigits->SetAddress(&fDigits);
 152   }else{
 153     AliError(Form("EXEC Branch T0 digits not found"));
 154      return;
 155   }
 156
 157   digitsTree->GetEvent(0);
 158   digitsTree->GetEntry(0);
 159   brDigits->GetEntry(0);
 160   fDigits->GetTimeCFD(*timeCFD);
 161   fDigits->GetTimeLED(*timeLED);
 162   fDigits->GetQT0(*chargeQT0);
 163   fDigits->GetQT1(*chargeQT1);
 164   Int_t onlineMean =  fDigits->MeanTime();
 165
 166   Bool_t tr[5];
 167   for (Int_t i=0; i<5; i++) tr[i]=false;
 168
 169   Double32_t besttimeA=999999;
 170   Double32_t besttimeC=999999;
 171   Int_t pmtBestA=99999;
 172   Int_t pmtBestC=99999;
 173
 174   AliT0RecPoint* frecpoints= new AliT0RecPoint ();
 175   clustersTree->Branch( "T0", "AliT0RecPoint" ,&frecpoints);
 176
 177   Float_t time[24], adc[24];
 178   for (Int_t ipmt=0; ipmt<24; ipmt++) {
 179     if(timeCFD->At(ipmt)>0 ){
 180      if(( chargeQT1->At(ipmt) - chargeQT0->At(ipmt))>0)
 181         adc[ipmt] = chargeQT1->At(ipmt) - chargeQT0->At(ipmt);
 182       else
 183         adc[ipmt] = 0;
 184
 185      time[ipmt] = fCalib-> WalkCorrection(refAmp, ipmt, Int_t(adc[ipmt]),  timeCFD->At(ipmt)) ;
 186
 187       Double_t sl = Double_t(timeLED->At(ipmt) - timeCFD->At(ipmt));
 188       //    time[ipmt] = fCalib-> WalkCorrection( refAmp,ipmt, Int_t(sl),  timeCFD->At(ipmt) ) ;
 189       AliDebug(5,Form(" ipmt %i QTC %i , time in chann %i (led-cfd) %i ",
 190                        ipmt, Int_t(adc[ipmt]) ,Int_t(time[ipmt]),Int_t( sl)));
 191
 192       Double_t ampMip =((TGraph*)fAmpLED.At(ipmt))->Eval(sl);
 193       Double_t qtMip = ((TGraph*)fQTC.At(ipmt))->Eval(adc[ipmt]);
 194       AliDebug(5,Form("  Amlitude in MIPS LED %f ,  QTC %f in channels %f\n ",ampMip,qtMip, adc[ipmt]));
 195
 196       frecpoints->SetTime(ipmt, Float_t(time[ipmt]) );
 197       frecpoints->SetAmpLED(ipmt, Float_t( ampMip)); //for cosmic &pp beam
 198       frecpoints->SetAmp(ipmt, Float_t(qtMip));
 199
 200     }
 201     else {
 202       time[ipmt] = 0;
 203       adc[ipmt] = 0;
 204     }
 205   }
 206
 207   for (Int_t ipmt=0; ipmt<12; ipmt++){
 208     if(time[ipmt] > 1 ) {
 209       if(time[ipmt]<besttimeC){
 210         besttimeC=time[ipmt]; //timeC
 211         pmtBestC=ipmt;
 212       }
 213     }
 214   }
 215   for ( Int_t ipmt=12; ipmt<24; ipmt++){
 216     if(time[ipmt] > 1) {
 217       if(time[ipmt]<besttimeA) {
 218         besttimeA=time[ipmt]; //timeA
 219         pmtBestA=ipmt;}
 220     }
 221   }
 222   if(besttimeA < 999999) {
 223     frecpoints->SetTimeBestA(Int_t(besttimeA *channelWidth - fdZonA/c));
 224     tr[1]=true;
 225   }
 226   if( besttimeC < 999999 ) {
 227     frecpoints->SetTimeBestC(Int_t(besttimeC *channelWidth - fdZonA/c));
 228     tr[2]=true;
 229   }
 230   AliDebug(5,Form(" besttimeA %f ch,  besttimeC %f ch",besttimeA, besttimeC));
 231   if(besttimeA <999999 && besttimeC < 999999 ){
 232     //    timeDiff = (besttimeC - besttimeA)*channelWidth;
 233     timeDiff = (besttimeA - besttimeC)*channelWidth;
 234     meanTime = (besttimeA + besttimeC)/2;// * channelWidth);
 235     timeclock = meanTime *channelWidth -fdZonA/c ;
 236     vertex = meanVertex - c*(timeDiff)/2.;// + (fdZonA - fdZonC)/2;
 237     tr[0]=true;
 238   }
 239   frecpoints->SetVertex(vertex);
 240   frecpoints->SetMeanTime(meanTime);
 241   frecpoints->SetT0clock(timeclock);
 242   frecpoints->SetT0Trig(tr);
 243
 244   AliDebug(5,Form("T0 triggers %d %d %d %d %d",tr[0],tr[1],tr[2],tr[3],tr[4]));
 245
 246   //online mean
 247   frecpoints->SetOnlineMean(Int_t(onlineMean));
 248   AliDebug(10,Form("  timeDiff %f #channel,  meanTime %f #channel, vertex %f cm online mean %i timeclock %f ps",timeDiff, meanTime,vertex, Int_t(onlineMean), timeclock));
 249
 250
 251
 252
 253
 254   clustersTree->Fill();
 255
 256   delete timeCFD;
 257   delete timeLED;
 258   delete chargeQT0;
 259   delete chargeQT1;
 260 }
 261
 262
 263 //_______________________________________________________________________
 264
 265 void AliT0Reconstructor::Reconstruct(AliRawReader* rawReader, TTree*recTree) const
 266 {
 267   // T0 raw ->
 268   //
 269   // reference amplitude and time ref. point from reco param
 270
 271   Float_t refAmp = GetRecoParam()->GetRefAmp();
 272   Int_t refPoint = 0;
 273   //Bad channel
 274   Int_t badpmt = GetRecoParam()->GetRefPoint();
 275   Int_t low[110], high[110];
 276
 277   Int_t allData[110][5];
 278
 279   Int_t timeCFD[24], timeLED[24], chargeQT0[24], chargeQT1[24];
 280   Double32_t timeDiff=999999, meanTime=999999, timeclock=999999;
 281   Float_t c = 29.9792458; // cm/ns
 282   Double32_t vertex = 9999999;
 283   Int_t onlineMean=0;
 284   // Float_t meanVertex = fParam->GetMeanVertex();
 285   Float_t meanVertex = 0;
 286   for (Int_t i0=0; i0<110; i0++)
 287     {
 288       for (Int_t j0=0; j0<5; j0++) allData[i0][j0]=0;
 289       low[i0] = Int_t (GetRecoParam()->GetLow(i0));
 290       high[i0] = Int_t (GetRecoParam()->GetHigh(i0));
 291      }
 292
 293   Double32_t besttimeA=9999999;
 294   Double32_t besttimeC=9999999;
 295   Int_t pmtBestA=99999;
 296   Int_t pmtBestC=99999;
 297
 298   AliT0RecPoint* frecpoints= new AliT0RecPoint ();
 299
 300   recTree->Branch( "T0", "AliT0RecPoint" ,&frecpoints);
 301
 302   AliDebug(10," before read data ");
 303   AliT0RawReader myrawreader(rawReader);
 304
 305   UInt_t type =rawReader->GetType();
 306
 307   if (!myrawreader.Next())
 308     AliDebug(1,Form(" no raw data found!!"));
 309   else
 310     {
 311    for (Int_t i=0; i<24; i++)
 312     {
 313       timeCFD[i]=0; timeLED[i]=0; chargeQT0[i]=0; chargeQT1[i]=0;
 314     }
 315      Int_t fBCID=Int_t (rawReader->GetBCID());
 316       Int_t trmbunch= myrawreader.GetTRMBunchID();
 317       AliDebug(10,Form(" CDH BC ID %i, TRM BC ID %i \n", fBCID, trmbunch ));
 318
 319       if(type == 7  ) {  //only physics
 320         for (Int_t i=0; i<107; i++) {
 321         for (Int_t iHit=0; iHit<5; iHit++)
 322           {
 323             allData[i][iHit] = myrawreader.GetData(i,iHit);
 324           }
 325         }
 326         Int_t ref=0;
 327         if (refPoint>0)
 328           ref = allData[refPoint][0]-5000;
 329
 330         Float_t channelWidth = fParam->GetChannelWidth() ;
 331
 332         //       Int_t meanT0 = fParam->GetMeanT0();
 333
 334         for (Int_t in=0; in<12; in++)
 335           {
 336             for (Int_t iHit=0; iHit<5; iHit++)
 337               {
 338                 if(allData[in+1][iHit] > low[in+1] &&
 339                    allData[in+1][iHit] < high[in+1])
 340                   {
 341                     timeCFD[in] = allData[in+1][iHit] ;
 342                     cout<<" low "<<low[in+1]<<" high "<<high[in+1]<<endl;
 343                     break;
 344                   }
 345               }
 346             for (Int_t iHit=0; iHit<5; iHit++)
 347               {
 348                 if(allData[in+12+1][iHit] > low[in+12+1] &&
 349                    allData[in+1+12][iHit] < high[in+12+1])
 350                   {
 351                         timeLED[in] = allData[in+12+1][iHit] ;
 352                         break;
 353                   }
 354               }
 355             for (Int_t iHit=0; iHit<5; iHit++)
 356               {
 357                 if(allData[in+1+56][iHit] > low[in+1+56] &&
 358                    allData[in+1+56][iHit] < high[in+1+56])
 359                   {
 360                     timeCFD[in+12] = allData[in+56+1][iHit] ;
 361                     cout<<" low "<<low[in+1+56]<<" high "<<high[in+1+56]<<endl;
 362                     break;
 363                   }
 364               }
 365
 366             for (Int_t iHit=0; iHit<5; iHit++)
 367               {
 368                 if(allData[in+1+68][iHit] > low[in+1+68] &&
 369                    allData[in+1+68][iHit] < high[in+1+68])
 370                   {
 371
 372                     timeLED[in+12] = allData[in+68+1][iHit] ;
 373                     break;
 374                   }
 375               }
 376             AliDebug(5, Form(" readed i %i cfdC %i cfdA %i ledC %i ledA%i ",
 377                               in, timeCFD[in],timeCFD[in+12],timeLED[in],
 378                               timeLED[in+12]));
 379
 380           }
 381
 382
 383         for (Int_t in=0; in<12;  in++)
 384           {
 385             chargeQT0[in]=allData[2*in+25][0];
 386             chargeQT1[in]=allData[2*in+26][0];
 387             AliDebug(10, Form(" readed Raw %i %i %i",
 388                               in, chargeQT0[in],chargeQT1[in]));
 389           }
 390         for (Int_t in=12; in<24;  in++)
 391           {
 392             chargeQT0[in]=allData[2*in+57][0];
 393             chargeQT1[in]=allData[2*in+58][0];
 394             AliDebug(10, Form(" readed Raw %i %i %i",
 395                               in, chargeQT0[in],chargeQT1[in]));
 396
 397           }
 398
 399         for (Int_t iHit=0; iHit<5; iHit++)
 400           {
 401               if(allData[49][iHit] > low[49] &&
 402                  allData[49][iHit] < high[49]){
 403                 onlineMean = allData[49][iHit];
 404                 break;
 405               }
 406           }
 407         Double32_t time[24], adc[24],  noncalibtime[24];
 408         for (Int_t ipmt=0; ipmt<24; ipmt++) {
 409           if(timeCFD[ipmt]>0 ){
 410            //for simulated data
 411              //for physics  data
 412            if(( chargeQT0[ipmt] - chargeQT1[ipmt])>0)  {
 413              adc[ipmt] = chargeQT0[ipmt] - chargeQT1[ipmt];
 414            }
 415            else
 416              adc[ipmt] = 0;
 417            time[ipmt] = fCalib-> WalkCorrection(Int_t (refAmp), ipmt, Int_t(adc[ipmt]), timeCFD[ipmt] ) ;
 418
 419            Double_t sl = timeLED[ipmt] - timeCFD[ipmt];
 420            // time[ipmt] = fCalib-> WalkCorrection( refAmp,ipmt, Int_t(sl), timeCFD[ipmt] ) ;
 421            AliDebug(5,Form(" ipmt %i QTC %i , time in chann %i (led-cfd) %i ",
 422                             ipmt, Int_t(adc[ipmt]) ,Int_t(time[ipmt]),Int_t( sl)));
 423            Double_t ampMip =( (TGraph*)fAmpLED.At(ipmt))->Eval(sl);
 424            Double_t qtMip = ((TGraph*)fQTC.At(ipmt))->Eval(adc[ipmt]);
 425            AliDebug(10,Form("  Amlitude in MIPS LED %f ; QTC %f;  in channels %f\n ",ampMip,qtMip, adc[ipmt]));
 426            //bad peak removing
 427              frecpoints->SetTime(ipmt, Float_t(time[ipmt]) );
 428              // frecpoints->SetTime(ipmt,Double32_t(timeCFD[ipmt]));
 429              frecpoints->SetAmp(ipmt, Double32_t( qtMip)); //for cosmic &pp beam
 430              frecpoints->SetAmpLED(ipmt, Double32_t(ampMip));
 431              noncalibtime[ipmt]= Double32_t (timeCFD[ipmt]);
 432          }
 433          else {
 434            time[ipmt] = 0;
 435            adc[ipmt] = 0;
 436            noncalibtime[ipmt] = 0;
 437          }
 438        }
 439        fESDTZEROfriend->SetT0timeCorr(noncalibtime) ;
 440        for (Int_t ipmt=0; ipmt<12; ipmt++){
 441          if(time[ipmt] > 1 && ipmt != badpmt && adc[ipmt]>0.1 )
 442            {
 443              if(time[ipmt]<besttimeC){
 444                   besttimeC=time[ipmt]; //timeC
 445                   pmtBestC=ipmt;
 446              }
 447            }
 448        }
 449        for ( Int_t ipmt=12; ipmt<24; ipmt++)
 450          {
 451            if(time[ipmt] > 1 && ipmt != badpmt && adc[ipmt]>0.1)
 452              {
 453                if(time[ipmt]<besttimeA) {
 454                  besttimeA=time[ipmt]; //timeA
 455                  pmtBestA=ipmt;
 456                }
 457              }
 458          }
 459        if(besttimeA < 999999)
 460          frecpoints->SetTimeBestA(besttimeA * channelWidth - 1000.*fLatencyHPTDC + 1000.*fLatencyL1A - 1000.*fGRPdelays - fTimeMeanShift[1]);
 461
 462        if( besttimeC < 999999 )
 463          frecpoints->SetTimeBestC(besttimeC * channelWidth - 1000.*fLatencyHPTDC +1000.*fLatencyL1C - 1000.*fGRPdelays - fTimeMeanShift[2]);
 464        AliDebug(5,Form(" pmtA %i besttimeA %f shift A %f ps, pmtC %i besttimeC %f shiftC %f ps",
 465                        pmtBestA,besttimeA, fTimeMeanShift[1],
 466                        pmtBestC,  besttimeC,fTimeMeanShift[2]));
 467         if(besttimeA <999999 && besttimeC < 999999 ){
 468          timeDiff = ( besttimeA - besttimeC)* 0.001* channelWidth + fLatencyL1A - fLatencyL1C;
 469          timeclock = channelWidth * Float_t( besttimeA+besttimeC)/2. - 1000.*fLatencyHPTDC + 1000.*fLatencyL1 - 1000.*fGRPdelays - fTimeMeanShift[0];
 470          meanTime = (besttimeA+besttimeC-2.*Float_t(ref))/2.;
 471          vertex =  meanVertex - c*(timeDiff)/2. ; //+ (fdZonA - fdZonC)/2;
 472         }
 473       }  //if phys event
 474       AliDebug(10,Form("  timeDiff %f #channel,  meanTime %f #channel, TOFmean%f  vertex %f cm meanVertex %f online mean %f \n",timeDiff, meanTime,timeclock, vertex,meanVertex, onlineMean));
 475       frecpoints->SetT0clock(timeclock);
 476       frecpoints->SetVertex(vertex);
 477       frecpoints->SetMeanTime(meanTime);
 478       frecpoints->SetOnlineMean(Int_t(onlineMean));
 479         // Set triggers
 480
 481       Bool_t tr[5];
 482       Int_t trchan[5]= {50,51,52,55,56};
 483       for (Int_t i=0; i<5; i++) tr[i]=false;
 484       for (Int_t itr=0; itr<5; itr++) {
 485         for (Int_t iHit=0; iHit<5; iHit++)
 486           {
 487             Int_t trr=trchan[itr];
 488             if( allData[trr][iHit] > 0) tr[itr]=true;
 489           }
 490       }
 491       frecpoints->SetT0Trig(tr);
 492
 493       //Set MPD
 494       if(allData[53][0]>0 && allData[54][0])
 495         frecpoints->SetMultA(allData[53][0]-allData[54][0]);
 496         if(allData[105][0]>0 && allData[106][0])
 497           frecpoints->SetMultC(allData[105][0]-allData[106][0]);
 498
 499
 500     } // if (else )raw data
 501   recTree->Fill();
 502   if(frecpoints) delete frecpoints;
 503 }
 504
 505
 506   //____________________________________________________________
 507
 508   void AliT0Reconstructor::FillESD(TTree */*digitsTree*/, TTree *clustersTree, AliESDEvent *pESD) const
 509   {
 510
 511   /***************************************************
 512   Resonstruct digits to vertex position
 513   ****************************************************/
 514
 515   AliDebug(1,Form("Start FillESD T0"));
 516   Float_t channelWidth = fParam->GetChannelWidth() ;
 517   Float_t c = 0.0299792458; // cm/ps
 518   Float_t currentVertex=0, shift=0;
 519   Int_t ncont=0;
 520   const AliESDVertex* vertex = pESD->GetPrimaryVertex();
 521   if (!vertex)        vertex = pESD->GetPrimaryVertexSPD();
 522   if (!vertex)        vertex = pESD->GetPrimaryVertexTPC();
 523   if (!vertex)        vertex = pESD->GetVertex();
 524
 525   if (vertex) {
 526     AliDebug(2, Form("Got %s (%s) from ESD: %f",
 527                     vertex->GetName(), vertex->GetTitle(), vertex->GetZ()));
 528     currentVertex = vertex->GetZ();
 529
 530     ncont = vertex->GetNContributors();
 531     //  cout<<"@@ spdver "<<spdver<<" ncont "<<ncont<<endl;
 532     if(ncont>2 ) {
 533       shift = currentVertex/c;
 534     }
 535   }
 536   TTree *treeR = clustersTree;
 537
 538   AliT0RecPoint* frecpoints= new AliT0RecPoint ();
 539   if (!frecpoints) {
 540     AliError("Reconstruct Fill ESD >> no recpoints found");
 541     return;
 542   }
 543
 544   AliDebug(1,Form("Start FillESD T0"));
 545   TBranch *brRec = treeR->GetBranch("T0");
 546   if (brRec) {
 547     brRec->SetAddress(&frecpoints);
 548   }else{
 549     AliError(Form("EXEC Branch T0 rec not found"));
 550     return;
 551   }
 552
 553   brRec->GetEntry(0);
 554   Double32_t amp[24], time[24], ampQTC[24], timecorr[24];
 555   Double32_t* tcorr;
 556   for(Int_t i=0; i<24; i++)
 557     amp[i]=time[i]=ampQTC[i]=timecorr[i]=0;
 558
 559
 560   Double32_t timeClock[3];
 561   Double32_t zPosition = frecpoints -> GetVertex();
 562   Double32_t timeStart = frecpoints -> GetMeanTime();
 563   timeClock[0] = frecpoints -> GetT0clock() ;
 564   timeClock[1] = frecpoints -> GetBestTimeA() + shift;
 565   timeClock[2] = frecpoints -> GetBestTimeC() - shift;
 566   for ( Int_t i=0; i<24; i++) {
 567     time[i] =  frecpoints -> GetTime(i); // ps to ns
 568     if ( time[i] >1) {
 569       ampQTC[i] = frecpoints -> GetAmp(i);
 570       amp[i] = frecpoints -> AmpLED(i);
 571       AliDebug(1,Form("T0: time %f  ampQTC %f ampLED %f \n", time[i], ampQTC[i], amp[i]));
 572    }
 573   }
 574   Int_t trig= frecpoints ->GetT0Trig();
 575   pESD->SetT0Trig(trig);
 576
 577   pESD->SetT0zVertex(zPosition); //vertex Z position
 578
 579   Double32_t multA=frecpoints ->GetMultA();
 580   Double32_t multC=frecpoints ->GetMultC();
 581   //  pESD->SetT0MultC(multC);        // multiplicity Cside
 582   //  pESD->SetT0MultA(multA);        // multiplicity Aside
 583
 584   for(Int_t i=0; i<3; i++)
 585     pESD->SetT0TOF(i,timeClock[i]);   // interaction time (ns)
 586   pESD->SetT0time(time);         // best TOF on each PMT
 587   pESD->SetT0amplitude(ampQTC);     // number of particles(MIPs) on each PMT
 588
 589   AliDebug(1,Form("T0: Vertex %f (T0A+T0C)/2 %f #channels T0signal %f ns OrA %f ns OrC %f T0trig %i\n",zPosition, timeStart, timeClock[0], timeClock[1], timeClock[2], trig));
 590
 591   if (pESD) {
 592
 593     AliESDfriend *fr = (AliESDfriend*)pESD->FindListObject("AliESDfriend");
 594     if (fr) {
 595       AliDebug(1, Form("Writing TZERO friend data to ESD tree"));
 596
 597       //     if (ncont>2) {
 598         tcorr = fESDTZEROfriend->GetT0timeCorr();
 599         for ( Int_t i=0; i<24; i++) {
 600           if(i<12 && time[i]>1) timecorr[i] = tcorr[i] -  shift/channelWidth;
 601           if(i>11 && time[i]>1) timecorr[i] = tcorr[i] +  shift/channelWidth;
 602           if(time[i]>1)   AliDebug(10,Form("T0 friend : time %f  ampQTC %f ampLED %f \n", timecorr[i], ampQTC[i], amp[i]));
 603         }
 604         fESDTZEROfriend->SetT0timeCorr( timecorr) ;
 605         fESDTZEROfriend->SetT0ampLEDminCFD(amp);
 606         fESDTZEROfriend->SetT0ampQTC(ampQTC);
 607         fr->SetTZEROfriend(fESDTZEROfriend);
 608         //      }//
 609     }
 610   }
 611
 612
 613
 614 } // vertex in 3 sigma
 615
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