T0/AliT0Reconstructor.cxx

   1
   2
   3 /**************************************************************************
   4  * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
   5  *                                                                        *
   6  * Author: The ALICE Off-line Project.                                    *
   7  * Contributors are mentioned in the code where appropriate.              *
   8  *                                                                        *
   9  * Permission to use, copy, modify and distribute this software and its   *
  10  * documentation strictly for non-commercial purposes is hereby granted   *
  11  * without fee, provided that the above copyright notice appears in all   *
  12  * copies and that both the copyright notice and this permission notice   *
  13  * appear in the supporting documentation. The authors make no claims     *
  14  * about the suitability of this software for any purpose. It is          *
  15  * provided "as is" without express or implied warranty.                  *
  16  **************************************************************************/
  17
  18 /* $Id$ */
  19 /*********************************************************************
  20  *  T0 reconstruction and filling ESD
  21  *  - reconstruct mean time (interation time)
  22  *  - vertex position
  23  *  -  multiplicity
  24  ********************************************************************/
  25
  26 #include <AliESDEvent.h>
  27 #include "AliLog.h"
  28 #include "AliT0RecPoint.h"
  29 #include "AliRawReader.h"
  30 #include "AliT0RawReader.h"
  31 #include "AliT0digit.h"
  32 #include "AliT0Reconstructor.h"
  33 #include "AliT0Parameters.h"
  34 #include "AliT0Calibrator.h"
  35 #include "AliESDfriend.h"
  36 #include "AliESDTZEROfriend.h"
  37 #include "AliLog.h"
  38 #include "AliCDBEntry.h"
  39 #include "AliCDBManager.h"
  40 #include "AliCTPTimeParams.h"
  41 #include "AliLHCClockPhase.h"
  42 #include "AliT0CalibSeasonTimeShift.h"
  43
  44 #include <TArrayI.h>
  45 #include <TGraph.h>
  46 #include <TMath.h>
  47 #include <Riostream.h>
  48
  49 ClassImp(AliT0Reconstructor)
  50
  51   AliT0Reconstructor:: AliT0Reconstructor(): AliReconstructor(),
  52                                              fdZonA(0),
  53                                              fdZonC(0),
  54                                              fZposition(0),
  55                                              fParam(NULL),
  56                                              fAmpLEDrec(),
  57                                              fQTC(0),
  58                                              fAmpLED(0),
  59                                              fCalib(),
  60                                              fLatencyHPTDC(9000),
  61                                              fLatencyL1(0),
  62                                              fLatencyL1A(0),
  63                                              fLatencyL1C(0),
  64                                              fGRPdelays(0),
  65                                              fTimeMeanShift(0x0),
  66                                              fTimeSigmaShift(0x0),
  67                                              fESDTZEROfriend(NULL)
  68
  69 {
  70   //constructor
  71   AliCDBEntry *entry = AliCDBManager::Instance()->Get("GRP/CTP/CTPtiming");
  72   if (!entry) AliFatal("CTP timing parameters are not found in OCDB !");
  73   AliCTPTimeParams *ctpParams = (AliCTPTimeParams*)entry->GetObject();
  74   Float_t l1Delay = (Float_t)ctpParams->GetDelayL1L0()*25.0;
  75
  76   AliCDBEntry *entry1 = AliCDBManager::Instance()->Get("GRP/CTP/TimeAlign");
  77   if (!entry1) AliFatal("CTP time-alignment is not found in OCDB !");
  78   AliCTPTimeParams *ctpTimeAlign = (AliCTPTimeParams*)entry1->GetObject();
  79   l1Delay += ((Float_t)ctpTimeAlign->GetDelayL1L0()*25.0);
  80
  81   AliCDBEntry *entry4 = AliCDBManager::Instance()->Get("GRP/Calib/LHCClockPhase");
  82   if (!entry4) AliFatal("LHC clock-phase shift is not found in OCDB !");
  83   AliLHCClockPhase *phase = (AliLHCClockPhase*)entry4->GetObject();
  84
  85   fGRPdelays = l1Delay - phase->GetMeanPhase();
  86
  87   AliCDBEntry *entry5 = AliCDBManager::Instance()->Get("T0/Calib/TimeAdjust");
  88   if (entry5) {
  89     AliT0CalibSeasonTimeShift *timeshift = (AliT0CalibSeasonTimeShift*)entry5->GetObject();
  90     fTimeMeanShift = timeshift->GetT0Means();
  91     fTimeSigmaShift  = timeshift->GetT0Sigmas();
  92      timeshift->Print();
  93   }
  94   else
  95     AliWarning("Time Adjust is not found in OCDB !");
  96
  97   fParam = AliT0Parameters::Instance();
  98   fParam->Init();
  99
 100   for (Int_t i=0; i<24; i++){
 101         TGraph* gr = fParam ->GetAmpLEDRec(i);
 102         if (gr) fAmpLEDrec.AddAtAndExpand(gr,i) ;
 103           TGraph* gr1 = fParam ->GetAmpLED(i);
 104           if (gr1) fAmpLED.AddAtAndExpand(gr1,i) ;
 105           TGraph* gr2 = fParam ->GetQTC(i);
 106           if (gr2) fQTC.AddAtAndExpand(gr2,i) ;
 107   }
 108
 109   fLatencyL1 = fParam->GetLatencyL1();
 110   fLatencyL1A = fParam->GetLatencyL1A();
 111   fLatencyL1C = fParam->GetLatencyL1C();
 112   fLatencyHPTDC = fParam->GetLatencyHPTDC();
 113   AliDebug(2,Form(" LatencyL1 %f latencyL1A %f latencyL1C %f latencyHPTDC %f \n",fLatencyL1, fLatencyL1A, fLatencyL1C, fLatencyHPTDC));
 114
 115   // fdZonC = TMath::Abs(fParam->GetZPositionShift("T0/C/PMT1"));
 116   //fdZonA = TMath::Abs(fParam->GetZPositionShift("T0/A/PMT15"));
 117   //here real Z position
 118   fdZonC = TMath::Abs(fParam->GetZPosition("T0/C/PMT1"));
 119   fdZonA = TMath::Abs(fParam->GetZPosition("T0/A/PMT15"));
 120
 121   fCalib = new AliT0Calibrator();
 122   fESDTZEROfriend = new AliESDTZEROfriend();
 123
 124 }
 125
 126 //_____________________________________________________________________________
 127 void AliT0Reconstructor::Reconstruct(TTree*digitsTree, TTree*clustersTree) const
 128
 129 {
 130   // T0 digits reconstruction
 131   Int_t refAmp = Int_t (GetRecoParam()->GetRefAmp());
 132
 133   TArrayI * timeCFD = new TArrayI(24);
 134   TArrayI * timeLED = new TArrayI(24);
 135   TArrayI * chargeQT0 = new TArrayI(24);
 136   TArrayI * chargeQT1 = new TArrayI(24);
 137
 138
 139   Float_t channelWidth = fParam->GetChannelWidth() ;
 140   Float_t meanVertex = fParam->GetMeanVertex();
 141   Float_t c = 0.0299792; // cm/ps
 142   Double32_t vertex = 9999999;
 143   Double32_t timeDiff=999999, meanTime=999999, timeclock=999999;
 144
 145
 146   AliDebug(1,Form("Start DIGITS reconstruction "));
 147
 148
 149   TBranch *brDigits=digitsTree->GetBranch("T0");
 150   AliT0digit *fDigits = new AliT0digit() ;
 151   if (brDigits) {
 152     brDigits->SetAddress(&fDigits);
 153   }else{
 154     AliError(Form("EXEC Branch T0 digits not found"));
 155      return;
 156   }
 157
 158   digitsTree->GetEvent(0);
 159   digitsTree->GetEntry(0);
 160   brDigits->GetEntry(0);
 161   fDigits->GetTimeCFD(*timeCFD);
 162   fDigits->GetTimeLED(*timeLED);
 163   fDigits->GetQT0(*chargeQT0);
 164   fDigits->GetQT1(*chargeQT1);
 165   Int_t onlineMean =  fDigits->MeanTime();
 166
 167   Bool_t tr[5];
 168   for (Int_t i=0; i<5; i++) tr[i]=false;
 169
 170   Double32_t besttimeA=999999;
 171   Double32_t besttimeC=999999;
 172   Int_t pmtBestA=99999;
 173   Int_t pmtBestC=99999;
 174
 175   AliT0RecPoint* frecpoints= new AliT0RecPoint ();
 176   clustersTree->Branch( "T0", "AliT0RecPoint" ,&frecpoints);
 177
 178   Float_t time[24], adc[24];
 179   for (Int_t ipmt=0; ipmt<24; ipmt++) {
 180     if(timeCFD->At(ipmt)>0 ){
 181      if(( chargeQT1->At(ipmt) - chargeQT0->At(ipmt))>0)
 182         adc[ipmt] = chargeQT1->At(ipmt) - chargeQT0->At(ipmt);
 183       else
 184         adc[ipmt] = 0;
 185
 186      time[ipmt] = fCalib-> WalkCorrection(refAmp, ipmt, Int_t(adc[ipmt]),  timeCFD->At(ipmt)) ;
 187
 188       Double_t sl = Double_t(timeLED->At(ipmt) - timeCFD->At(ipmt));
 189       //    time[ipmt] = fCalib-> WalkCorrection( refAmp,ipmt, Int_t(sl),  timeCFD->At(ipmt) ) ;
 190       AliDebug(5,Form(" ipmt %i QTC %i , time in chann %i (led-cfd) %i ",
 191                        ipmt, Int_t(adc[ipmt]) ,Int_t(time[ipmt]),Int_t( sl)));
 192
 193       Double_t ampMip =((TGraph*)fAmpLED.At(ipmt))->Eval(sl);
 194       Double_t qtMip = ((TGraph*)fQTC.At(ipmt))->Eval(adc[ipmt]);
 195       AliDebug(5,Form("  Amlitude in MIPS LED %f ,  QTC %f in channels %f\n ",ampMip,qtMip, adc[ipmt]));
 196
 197       frecpoints->SetTime(ipmt, Float_t(time[ipmt]) );
 198       frecpoints->SetAmpLED(ipmt, Float_t( ampMip)); //for cosmic &pp beam
 199       frecpoints->SetAmp(ipmt, Float_t(qtMip));
 200
 201     }
 202     else {
 203       time[ipmt] = 0;
 204       adc[ipmt] = 0;
 205     }
 206   }
 207
 208   for (Int_t ipmt=0; ipmt<12; ipmt++){
 209     if(time[ipmt] > 1 ) {
 210       if(time[ipmt]<besttimeC){
 211         besttimeC=time[ipmt]; //timeC
 212         pmtBestC=ipmt;
 213       }
 214     }
 215   }
 216   for ( Int_t ipmt=12; ipmt<24; ipmt++){
 217     if(time[ipmt] > 1) {
 218       if(time[ipmt]<besttimeA) {
 219         besttimeA=time[ipmt]; //timeA
 220         pmtBestA=ipmt;}
 221     }
 222   }
 223   if(besttimeA < 999999) {
 224     frecpoints->SetTimeBestA(Int_t(besttimeA *channelWidth - fdZonA/c));
 225     tr[1]=true;
 226   }
 227   if( besttimeC < 999999 ) {
 228     frecpoints->SetTimeBestC(Int_t(besttimeC *channelWidth - fdZonA/c));
 229     tr[2]=true;
 230   }
 231   AliDebug(5,Form(" besttimeA %f ch,  besttimeC %f ch",besttimeA, besttimeC));
 232   if(besttimeA <999999 && besttimeC < 999999 ){
 233     //    timeDiff = (besttimeC - besttimeA)*channelWidth;
 234     timeDiff = (besttimeA - besttimeC)*channelWidth;
 235     meanTime = (besttimeA + besttimeC)/2;// * channelWidth);
 236     timeclock = meanTime *channelWidth -fdZonA/c ;
 237     vertex = meanVertex - c*(timeDiff)/2.;// + (fdZonA - fdZonC)/2;
 238     tr[0]=true;
 239   }
 240   frecpoints->SetVertex(vertex);
 241   frecpoints->SetMeanTime(meanTime);
 242   frecpoints->SetT0clock(timeclock);
 243   frecpoints->SetT0Trig(tr);
 244
 245   AliDebug(5,Form("T0 triggers %d %d %d %d %d",tr[0],tr[1],tr[2],tr[3],tr[4]));
 246
 247   //online mean
 248   frecpoints->SetOnlineMean(Int_t(onlineMean));
 249   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));
 250
 251
 252
 253
 254
 255   clustersTree->Fill();
 256
 257   delete timeCFD;
 258   delete timeLED;
 259   delete chargeQT0;
 260   delete chargeQT1;
 261 }
 262
 263
 264 //_______________________________________________________________________
 265
 266 void AliT0Reconstructor::Reconstruct(AliRawReader* rawReader, TTree*recTree) const
 267 {
 268   // T0 raw ->
 269   //
 270   // reference amplitude and time ref. point from reco param
 271
 272   Float_t refAmp = GetRecoParam()->GetRefAmp();
 273   Int_t refPoint = 0;
 274   //Bad channel
 275   Int_t badpmt = GetRecoParam()->GetRefPoint();
 276   Int_t low[110], high[110];
 277
 278   Int_t allData[110][5];
 279
 280   Int_t timeCFD[24], timeLED[24], chargeQT0[24], chargeQT1[24];
 281   Double32_t timeDiff=999999, meanTime=999999, timeclock=9999999;
 282   Float_t c = 29.9792458; // cm/ns
 283   Double32_t vertex = 9999999;
 284   Int_t onlineMean=0;
 285   // Float_t meanVertex = fParam->GetMeanVertex();
 286   Float_t meanVertex = 0;
 287   for (Int_t i0=0; i0<110; i0++)
 288     {
 289       for (Int_t j0=0; j0<5; j0++) allData[i0][j0]=0;
 290       low[i0] = Int_t (GetRecoParam()->GetLow(i0));
 291       high[i0] = Int_t (GetRecoParam()->GetHigh(i0));
 292       }
 293
 294   Double32_t besttimeA=9999999;
 295   Double32_t besttimeC=9999999;
 296   Int_t pmtBestA=99999;
 297   Int_t pmtBestC=99999;
 298
 299   AliT0RecPoint* frecpoints= new AliT0RecPoint ();
 300
 301   recTree->Branch( "T0", "AliT0RecPoint" ,&frecpoints);
 302
 303   AliDebug(10," before read data ");
 304   AliT0RawReader myrawreader(rawReader);
 305
 306   UInt_t type =rawReader->GetType();
 307
 308   if (!myrawreader.Next())
 309     AliDebug(1,Form(" no raw data found!!"));
 310   else
 311     {
 312    for (Int_t i=0; i<24; i++)
 313     {
 314       timeCFD[i]=0; timeLED[i]=0; chargeQT0[i]=0; chargeQT1[i]=0;
 315     }
 316      Int_t fBCID=Int_t (rawReader->GetBCID());
 317       Int_t trmbunch= myrawreader.GetTRMBunchID();
 318       AliDebug(10,Form(" CDH BC ID %i, TRM BC ID %i \n", fBCID, trmbunch ));
 319
 320       if(type == 7  ) {  //only physics
 321         for (Int_t i=0; i<107; i++) {
 322         for (Int_t iHit=0; iHit<5; iHit++)
 323           {
 324             allData[i][iHit] = myrawreader.GetData(i,iHit);
 325           }
 326         }
 327         Int_t ref=0;
 328         if (refPoint>0)
 329           ref = allData[refPoint][0]-5000;
 330
 331         Float_t channelWidth = fParam->GetChannelWidth() ;
 332
 333         //       Int_t meanT0 = fParam->GetMeanT0();
 334
 335         for (Int_t in=0; in<12; in++)
 336           {
 337             for (Int_t iHit=0; iHit<5; iHit++)
 338               {
 339                 if(allData[in+1][iHit] > low[in+1] &&
 340                    allData[in+1][iHit] < high[in+1])
 341                   {
 342                     timeCFD[in] = allData[in+1][iHit] ;
 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                     break;
 362                   }
 363               }
 364
 365             for (Int_t iHit=0; iHit<5; iHit++)
 366               {
 367                 if(allData[in+1+68][iHit] > low[in+1+68] &&
 368                    allData[in+1+68][iHit] < high[in+1+68])
 369                   {
 370
 371                     timeLED[in+12] = allData[in+68+1][iHit] ;
 372                     break;
 373                   }
 374               }
 375             AliDebug(5, Form(" readed i %i cfdC %i cfdA %i ledC %i ledA%i ",
 376                               in, timeCFD[in],timeCFD[in+12],timeLED[in],
 377                               timeLED[in+12]));
 378
 379           }
 380
 381
 382         for (Int_t in=0; in<12;  in++)
 383           {
 384             chargeQT0[in]=allData[2*in+25][0];
 385             chargeQT1[in]=allData[2*in+26][0];
 386             AliDebug(10, Form(" readed Raw %i %i %i",
 387                               in, chargeQT0[in],chargeQT1[in]));
 388           }
 389         for (Int_t in=12; in<24;  in++)
 390           {
 391             chargeQT0[in]=allData[2*in+57][0];
 392             chargeQT1[in]=allData[2*in+58][0];
 393             AliDebug(10, Form(" readed Raw %i %i %i",
 394                               in, chargeQT0[in],chargeQT1[in]));
 395
 396           }
 397
 398         for (Int_t iHit=0; iHit<5; iHit++)
 399           {
 400               if(allData[49][iHit] > low[49] &&
 401                  allData[49][iHit] < high[49]){
 402                 onlineMean = allData[49][iHit];
 403                 break;
 404               }
 405           }
 406         Double32_t time[24], adc[24],  noncalibtime[24];
 407         for (Int_t ipmt=0; ipmt<24; ipmt++) {
 408           if(timeCFD[ipmt]>0 ){
 409            //for simulated data
 410              //for physics  data
 411            if(( chargeQT0[ipmt] - chargeQT1[ipmt])>0)  {
 412              adc[ipmt] = chargeQT0[ipmt] - chargeQT1[ipmt];
 413            }
 414            else
 415              adc[ipmt] = 0;
 416            time[ipmt] = fCalib-> WalkCorrection(Int_t (refAmp), ipmt, Int_t(adc[ipmt]), timeCFD[ipmt] ) ;
 417
 418            Double_t sl = timeLED[ipmt] - timeCFD[ipmt];
 419            // time[ipmt] = fCalib-> WalkCorrection( refAmp,ipmt, Int_t(sl), timeCFD[ipmt] ) ;
 420            AliDebug(5,Form(" ipmt %i QTC %i , time in chann %i (led-cfd) %i ",
 421                             ipmt, Int_t(adc[ipmt]) ,Int_t(time[ipmt]),Int_t( sl)));
 422            Double_t ampMip =( (TGraph*)fAmpLED.At(ipmt))->Eval(sl);
 423            Double_t qtMip = ((TGraph*)fQTC.At(ipmt))->Eval(adc[ipmt]);
 424            AliDebug(10,Form("  Amlitude in MIPS LED %f ; QTC %f;  in channels %f\n ",ampMip,qtMip, adc[ipmt]));
 425            //bad peak removing
 426              frecpoints->SetTime(ipmt, Float_t(time[ipmt]) );
 427              // frecpoints->SetTime(ipmt,Double32_t(timeCFD[ipmt]));
 428              frecpoints->SetAmp(ipmt, Double32_t( qtMip)); //for cosmic &pp beam
 429              frecpoints->SetAmpLED(ipmt, Double32_t(ampMip));
 430              noncalibtime[ipmt]= Double32_t (timeCFD[ipmt]);
 431          }
 432          else {
 433            time[ipmt] = 0;
 434            adc[ipmt] = 0;
 435            noncalibtime[ipmt] = 0;
 436          }
 437        }
 438        fESDTZEROfriend->SetT0timeCorr(noncalibtime) ;
 439        for (Int_t ipmt=0; ipmt<12; ipmt++){
 440          if(time[ipmt] > 1 && ipmt != badpmt && adc[ipmt]>0.1 )
 441            {
 442              if(time[ipmt]<besttimeC){
 443                   besttimeC=time[ipmt]; //timeC
 444                   pmtBestC=ipmt;
 445              }
 446            }
 447        }
 448        for ( Int_t ipmt=12; ipmt<24; ipmt++)
 449          {
 450            if(time[ipmt] > 1 && ipmt != badpmt && adc[ipmt]>0.1)
 451              {
 452                if(time[ipmt]<besttimeA) {
 453                  besttimeA=time[ipmt]; //timeA
 454                  pmtBestA=ipmt;
 455                }
 456              }
 457          }
 458        if(besttimeA < 999999)
 459          frecpoints->SetTimeBestA(besttimeA * channelWidth - 1000.*fLatencyHPTDC + 1000.*fLatencyL1A - 1000.*fGRPdelays - fTimeMeanShift[1]);
 460
 461        if( besttimeC < 999999 )
 462          frecpoints->SetTimeBestC(besttimeC * channelWidth - 1000.*fLatencyHPTDC +1000.*fLatencyL1C - 1000.*fGRPdelays - fTimeMeanShift[2]);
 463        AliDebug(5,Form(" pmtA %i besttimeA %f shift A %f ps, pmtC %i besttimeC %f shiftC %f ps",
 464                        pmtBestA,besttimeA, fTimeMeanShift[1],
 465
 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 %i \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=-1;
 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>0 ) {
 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   pESD->SetT0(multA); // for backward compatubility
 584   pESD->SetT0clock(multC); // for backward compatubility
 585
 586   for(Int_t i=0; i<3; i++)
 587     pESD->SetT0TOF(i,timeClock[i]);   // interaction time (ns)
 588   pESD->SetT0time(time);         // best TOF on each PMT
 589   pESD->SetT0amplitude(ampQTC);     // number of particles(MIPs) on each PMT
 590
 591   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));
 592
 593   if (pESD) {
 594
 595     AliESDfriend *fr = (AliESDfriend*)pESD->FindListObject("AliESDfriend");
 596     if (fr) {
 597       AliDebug(1, Form("Writing TZERO friend data to ESD tree"));
 598
 599       //     if (ncont>2) {
 600         tcorr = fESDTZEROfriend->GetT0timeCorr();
 601         for ( Int_t i=0; i<24; i++) {
 602           if(i<12 && time[i]>1) timecorr[i] = tcorr[i] -  shift/channelWidth;
 603           if(i>11 && time[i]>1) timecorr[i] = tcorr[i] +  shift/channelWidth;
 604           if(time[i]>1)   AliDebug(10,Form("T0 friend : time %f  ampQTC %f ampLED %f \n", timecorr[i], ampQTC[i], amp[i]));
 605         }
 606         fESDTZEROfriend->SetT0timeCorr( timecorr) ;
 607         fESDTZEROfriend->SetT0ampLEDminCFD(amp);
 608         fESDTZEROfriend->SetT0ampQTC(ampQTC);
 609         fr->SetTZEROfriend(fESDTZEROfriend);
 610         //      }//
 611     }
 612   }
 613
 614
 615
 616 } // vertex in 3 sigma
 617
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