T0/AliT0Reconstructor.cxx

   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 /* $Id$ */
  17 /*********************************************************************
  18  *  T0 reconstruction and filling ESD
  19  *  - reconstruct mean time (interation time)
  20  *  - vertex position
  21  *  -  multiplicity
  22  ********************************************************************/
  23
  24 #include <AliESDEvent.h>
  25 #include "AliLog.h"
  26 #include "AliT0RecPoint.h"
  27 #include "AliRawReader.h"
  28 #include "AliT0RawReader.h"
  29 #include "AliT0digit.h"
  30 #include "AliT0Reconstructor.h"
  31 #include "AliT0Parameters.h"
  32 #include "AliT0Calibrator.h"
  33
  34 #include <TArrayI.h>
  35 #include <TGraph.h>
  36 #include <TMath.h>
  37 #include <Riostream.h>
  38
  39 ClassImp(AliT0Reconstructor)
  40
  41   AliT0Reconstructor:: AliT0Reconstructor(): AliReconstructor(),
  42                                              fdZonA(0),
  43                                              fdZonC(0),
  44                                              fZposition(0),
  45                                              fParam(NULL),
  46                                              fAmpLEDrec(),
  47                                              fQTC(0),
  48                                              fAmpLED(0),
  49                                              fCalib()
  50 {
  51   //constructor
  52
  53  AliDebug(1,"Start reconstructor ");
  54
  55   fParam = AliT0Parameters::Instance();
  56   fParam->Init();
  57    TString option = GetOption();
  58
  59   for (Int_t i=0; i<24; i++){
  60         TGraph* gr = fParam ->GetAmpLEDRec(i);
  61         if (gr) fAmpLEDrec.AddAtAndExpand(gr,i) ;
  62           TGraph* gr1 = fParam ->GetAmpLED(i);
  63           if (gr1) fAmpLED.AddAtAndExpand(gr1,i) ;
  64           TGraph* gr2 = fParam ->GetQTC(i);
  65           if (gr2) fQTC.AddAtAndExpand(gr2,i) ;
  66
  67   }
  68
  69   fdZonC = TMath::Abs(fParam->GetZPositionShift("T0/C/PMT1"));
  70   fdZonA = TMath::Abs(fParam->GetZPositionShift("T0/A/PMT15"));
  71   fCalib = new AliT0Calibrator();
  72
  73 }
  74 //____________________________________________________________________
  75
  76 AliT0Reconstructor::AliT0Reconstructor(const AliT0Reconstructor &r):
  77   AliReconstructor(r),
  78                                              fdZonA(0),
  79                                              fdZonC(0),
  80                                              fZposition(0),
  81                                              fParam(NULL),
  82                                              fAmpLEDrec(),
  83                                              fQTC(0),
  84                                              fAmpLED(0),
  85                                              fCalib()
  86
  87  {
  88   //
  89   // AliT0Reconstructor copy constructor
  90   //
  91
  92   ((AliT0Reconstructor &) r).Copy(*this);
  93
  94 }
  95
  96 //_____________________________________________________________________________
  97 AliT0Reconstructor &AliT0Reconstructor::operator=(const AliT0Reconstructor &r)
  98 {
  99   //
 100   // Assignment operator
 101   //
 102
 103   if (this != &r) ((AliT0Reconstructor &) r).Copy(*this);
 104   return *this;
 105
 106 }
 107
 108 //_____________________________________________________________________________
 109
 110 void AliT0Reconstructor::Reconstruct(TTree*digitsTree, TTree*clustersTree) const
 111
 112 {
 113   // T0 digits reconstruction
 114   // T0RecPoint writing
 115
 116
 117   TArrayI * timeCFD = new TArrayI(24);
 118   TArrayI * timeLED = new TArrayI(24);
 119   TArrayI * chargeQT0 = new TArrayI(24);
 120   TArrayI * chargeQT1 = new TArrayI(24);
 121
 122
 123   //  Int_t mV2Mip = param->GetmV2Mip();
 124   //mV2Mip = param->GetmV2Mip();
 125   Float_t channelWidth = fParam->GetChannelWidth() ;
 126   Float_t meanVertex = fParam->GetMeanVertex();
 127
 128   AliDebug(1,Form("Start DIGITS reconstruction "));
 129
 130
 131  TBranch *brDigits=digitsTree->GetBranch("T0");
 132   AliT0digit *fDigits = new AliT0digit() ;
 133   if (brDigits) {
 134     brDigits->SetAddress(&fDigits);
 135   }else{
 136     AliError(Form("EXEC Branch T0 digits not found"));
 137      return;
 138   }
 139
 140   digitsTree->GetEvent(0);
 141   digitsTree->GetEntry(0);
 142   brDigits->GetEntry(0);
 143   fDigits->GetTimeCFD(*timeCFD);
 144   fDigits->GetTimeLED(*timeLED);
 145   fDigits->GetQT0(*chargeQT0);
 146   fDigits->GetQT1(*chargeQT1);
 147   Int_t onlineMean =  fDigits->MeanTime();
 148
 149
 150   Float_t besttimeA=999999;
 151   Float_t besttimeC=999999;
 152   Int_t pmtBestA=99999;
 153   Int_t pmtBestC=99999;
 154   Float_t timeDiff=999999, meanTime=0;
 155
 156   Int_t mv2MIP = fParam-> GetmV2Mip();
 157
 158
 159   AliT0RecPoint* frecpoints= new AliT0RecPoint ();
 160   clustersTree->Branch( "T0", "AliT0RecPoint" ,&frecpoints, 405,1);
 161
 162   Float_t time[24], adc[24];
 163   for (Int_t ipmt=0; ipmt<24; ipmt++) {
 164     if(timeCFD->At(ipmt)>0 ){
 165       Double_t qt0 = Double_t(chargeQT0->At(ipmt));
 166       Double_t qt1 = Double_t(chargeQT1->At(ipmt));
 167       if((qt1-qt0)>0)  adc[ipmt] = Int_t (TMath::Exp( Double_t (channelWidth*(qt1-qt0)/1000)));
 168
 169       time[ipmt] = fCalib-> WalkCorrection( ipmt, Int_t(qt1) , timeCFD->At(ipmt), "pdc" ) ;
 170
 171       //LED
 172       Float_t ampLED;    //LED
 173       Double_t sl = (timeLED->At(ipmt) - time[ipmt])*channelWidth;
 174       if( adc[ipmt]/Float_t(mv2MIP) < 20)
 175         {
 176           Double_t qt=((TGraph*)fAmpLEDrec.At(ipmt))->Eval(sl/1000.);
 177           ampLED = qt/Float_t(mv2MIP);
 178           AliDebug(1,Form(" ipmt %i QTC %f ch QTC in MIP %f, time in chann %f (led-cfd) %f in MIPs %f",
 179                           ipmt, adc[ipmt], adc[ipmt]/Float_t(mv2MIP), time[ipmt],sl,ampLED ));
 180         }
 181       else
 182         { AliDebug(1,Form(" amplitude %f MIPs on PMT %i, write QTC in both ", (adc[ipmt]/Float_t(mv2MIP)), ipmt));
 183           ampLED=adc[ipmt]/Float_t(mv2MIP);}
 184       frecpoints->SetTime(ipmt,time[ipmt]);
 185       frecpoints->SetAmp(ipmt,adc[ipmt]/Float_t(mv2MIP));
 186       frecpoints->SetAmpLED(ipmt,ampLED);
 187     }
 188     else {
 189       time[ipmt] = 0;
 190       adc[ipmt] = 0;
 191     }
 192   }
 193
 194   for (Int_t ipmt=0; ipmt<12; ipmt++){
 195     if(time[ipmt] > 1 ) {
 196       if(time[ipmt]<besttimeC){
 197         besttimeC=time[ipmt]; //timeC
 198         pmtBestC=ipmt;
 199       }
 200     }
 201   }
 202   for ( Int_t ipmt=12; ipmt<24; ipmt++){
 203     if(time[ipmt] > 1) {
 204       if(time[ipmt]<besttimeA) {
 205         besttimeA=time[ipmt]; //timeA
 206         pmtBestA=ipmt;}
 207     }
 208   }
 209   if(besttimeA !=999999)  frecpoints->SetTimeBestA(Int_t(besttimeA));
 210   if( besttimeC != 999999 ) frecpoints->SetTimeBestC(Int_t(besttimeC));
 211   AliDebug(1,Form(" besttimeA %f ch,  besttimeC %f ch",besttimeA, besttimeC));
 212   Float_t c = 0.0299792; // cm/ps
 213   Float_t vertex = 0;
 214   if(besttimeA !=999999 && besttimeC != 999999 ){
 215     timeDiff = (besttimeC - besttimeA)*channelWidth;
 216     meanTime = (Float_t((besttimeA + besttimeC -4000)/2) * channelWidth);
 217     //    meanTime = (meanT0 - (besttimeA + besttimeC)/2) * channelWidth;
 218     vertex = meanVertex - c*(timeDiff)/2. + (fdZonA - fdZonC)/2;
 219     frecpoints->SetVertex(vertex);
 220     frecpoints->SetMeanTime(Int_t(meanTime));
 221     //online mean
 222     frecpoints->SetOnlineMean(Int_t(onlineMean * channelWidth));
 223     AliDebug(1,Form("  timeDiff %f ps,  meanTime %f ps, vertex %f cm online mean %i ps",timeDiff, meanTime,vertex, Int_t(onlineMean * channelWidth )));
 224
 225   }
 226
 227   clustersTree->Fill();
 228
 229   delete timeCFD;
 230   delete timeLED;
 231   delete chargeQT0;
 232   delete chargeQT1;
 233 }
 234
 235
 236 //_______________________________________________________________________
 237
 238 void AliT0Reconstructor::Reconstruct(AliRawReader* rawReader, TTree*recTree) const
 239 {
 240   // T0 raw ->
 241   // T0RecPoint writing
 242
 243   //Q->T-> coefficients !!!! should be measured!!!
 244   Int_t allData[110][5];
 245
 246   Int_t timeCFD[24], timeLED[24], chargeQT0[24], chargeQT1[24];
 247   TString option = GetOption();
 248   AliDebug(10,Form("Option: %s\n", option.Data()));
 249
 250
 251   for (Int_t i0=0; i0<105; i0++)
 252     {
 253       for (Int_t j0=0; j0<5; j0++) allData[i0][j0]=0;
 254     }
 255
 256   Float_t besttimeA=9999999;
 257   Float_t besttimeC=9999999;
 258   Int_t pmtBestA=99999;
 259   Int_t pmtBestC=99999;
 260   Float_t timeDiff=9999999, meanTime=0;
 261   Double_t qt=0;
 262   Int_t mv2MIP = fParam-> GetmV2Mip();
 263   Float_t meanVertex = fParam->GetMeanVertex();
 264
 265   //  UInt_t type =rawReader->GetType();
 266
 267   AliT0RecPoint* frecpoints= new AliT0RecPoint ();
 268
 269   recTree->Branch( "T0", "AliT0RecPoint" ,&frecpoints, 405,1);
 270
 271
 272   AliDebug(10," before read data ");
 273   AliT0RawReader myrawreader(rawReader);
 274   if (!myrawreader.Next())
 275     AliDebug(1,Form(" no raw data found!!"));
 276   else
 277     {
 278       for (Int_t i=0; i<105; i++) {
 279         for (Int_t iHit=0; iHit<5; iHit++)
 280           {
 281             allData[i][iHit] = myrawreader.GetData(i,iHit);
 282           }
 283       }
 284
 285       Float_t channelWidth = fParam->GetChannelWidth() ;
 286
 287       //       Int_t meanT0 = fParam->GetMeanT0();
 288       if(option == "pdc"){
 289         for (Int_t in=0; in<24; in++)
 290           {
 291
 292             timeLED[in] = allData[in+1][0] ;
 293             timeCFD[in] = allData[in+25][0] ;
 294             chargeQT1[in] = allData[in+57][0] ;
 295              chargeQT0[in] = allData[in+81][0] ;
 296           }
 297        }
 298
 299       if(option == "cosmic"  ) //&& type == 7 )
 300         {
 301
 302           for (Int_t in=0; in<12; in++)
 303             {
 304               timeCFD[in] = allData[in+1][0] ;
 305               timeCFD[in+12] = allData[in+56+1][0] ;
 306               timeLED[in] = allData[in+12+1][0] ;
 307               timeLED[in+12] = allData[in+68+1][0] ;
 308             }
 309
 310           for (Int_t in=0; in<12;  in++)
 311             {
 312               chargeQT1[in]=allData[2*in+25][0];
 313               chargeQT0[in]=allData[2*in+26][0];
 314             }
 315
 316            for (Int_t in=12; in<24;  in++)
 317              {
 318                chargeQT1[in]=allData[2*in+57][0];
 319                chargeQT0[in]=allData[2*in+58][0];
 320              }
 321
 322          } //cosmic with physics event
 323        for (Int_t in=0; in<24; in++)
 324          AliDebug(10, Form(" readed Raw %i %i %i %i %i",
 325                            in, timeLED[in],timeCFD[in],chargeQT0[in],chargeQT1[in]));
 326        Int_t onlineMean = allData[49][0];
 327
 328        Float_t time[24], adc[24];
 329        for (Int_t ipmt=0; ipmt<24; ipmt++) {
 330          if(timeCFD[ipmt]>0 && timeLED[ipmt]>0){
 331            //for simulated data
 332            if(option == "pdc"){
 333              Double_t qt0 = Double_t(chargeQT0[ipmt]);
 334              Double_t qt1 = Double_t(chargeQT1[ipmt]);
 335              if((qt1-qt0)>0)  adc[ipmt] = Int_t(TMath::Exp( Double_t (channelWidth*(qt1-qt0)/1000.)));
 336              time[ipmt] = fCalib-> WalkCorrection( ipmt,Int_t(qt1) , timeCFD[ipmt], "pdc" ) ;
 337              Double_t sl = (timeLED[ipmt] - time[ipmt])*channelWidth;
 338              //pp collison
 339              if( adc[ipmt]/Float_t(mv2MIP) < 20)
 340                {
 341                  if(fAmpLEDrec.At(ipmt))
 342                    qt=((TGraph*)fAmpLEDrec.At(ipmt))->Eval(sl/1000.);
 343                }
 344              else //PbPb
 345                { AliDebug(1,Form(" amplitude %f MIPs on PMT %i, write QTC in both ", (adc[ipmt]/Float_t(mv2MIP)), ipmt));
 346                  qt=adc[ipmt]/Float_t(mv2MIP);}
 347
 348              frecpoints->SetTime(ipmt,time[ipmt]);
 349              frecpoints->SetAmp(ipmt,adc[ipmt]/Float_t(mv2MIP));
 350              frecpoints->SetAmpLED(ipmt,qt/Float_t(mv2MIP));
 351              AliDebug(10,Form(" QTC %f mv,  time in chann %f ampLED %f",adc[ipmt] ,time[ipmt], qt));
 352              AliDebug(10,Form("  Amlitude in MIPS LED %f ,  QTC %f \n ", adc[ipmt]/Float_t(mv2MIP),qt/Float_t(mv2MIP)));
 353            }
 354
 355
 356              //for physics  data
 357            if(option == "cosmic") // && type == 7)
 358              {
 359              if(( chargeQT1[ipmt] - chargeQT0[ipmt])>0)
 360                adc[ipmt] = chargeQT1[ipmt] - chargeQT0[ipmt];
 361              else
 362                adc[ipmt] = 0;
 363              //      time[ipmt] = fCalib-> WalkCorrection( ipmt, adc[ipmt], timeCFD[ipmt],"cosmic" ) ;
 364
 365              Double_t sl = timeLED[ipmt] - timeCFD[ipmt];
 366              time[ipmt] = fCalib-> WalkCorrection( ipmt, Int_t(sl), timeCFD[ipmt],"cosmic" ) ;
 367              AliDebug(10,Form(" ipmt %i QTC %i , time in chann %i (led-cfd) %i ",
 368                               ipmt, Int_t(adc[ipmt]) ,Int_t(time[ipmt]),Int_t( sl)));
 369              Double_t ampMip =( (TGraph*)fAmpLED.At(ipmt))->Eval(sl);
 370              Double_t qtMip = ((TGraph*)fQTC.At(ipmt))->Eval(adc[ipmt]);
 371              AliDebug(10,Form("  Amlitude in MIPS LED %f ,  QTC %f \n ",ampMip,qtMip));
 372
 373              frecpoints->SetTime(ipmt, Float_t(time[ipmt]) );
 374              frecpoints->SetAmp(ipmt, Float_t( ampMip)); //for cosmic &pp beam
 375              frecpoints->SetAmpLED(ipmt, Float_t(qtMip));
 376            } //if physic data end
 377
 378          }
 379          else {
 380            time[ipmt] = 0;
 381            adc[ipmt] = 0;
 382          }
 383        }
 384
 385        for (Int_t ipmt=0; ipmt<12; ipmt++){
 386          if(time[ipmt] > 1 ) {
 387            if(time[ipmt]<besttimeC){
 388              besttimeC=time[ipmt]; //timeC
 389              pmtBestC=ipmt;
 390            }
 391          }
 392        }
 393        for ( Int_t ipmt=12; ipmt<24; ipmt++){
 394          if(time[ipmt] > 1) {
 395            if(time[ipmt]<besttimeA) {
 396              besttimeA=time[ipmt]; //timeA
 397              pmtBestA=ipmt;}
 398          }
 399        }
 400        if(besttimeA !=9999999)  frecpoints->SetTimeBestA(Int_t(besttimeA));
 401        if( besttimeC != 9999999 ) frecpoints->SetTimeBestC(Int_t(besttimeC));
 402        AliDebug(1,Form(" besttimeA %f ps,  besttimeC %f ps",besttimeA, besttimeC));
 403        Float_t c = 0.0299792; // cm/ps
 404        Float_t vertex = 99999;
 405        if(besttimeA <9999999 && besttimeC < 9999999 ){
 406          timeDiff = ( besttimeC - besttimeA) *channelWidth;
 407          if(option == "pdc"){
 408            //      meanTime = (besttimeA + besttimeC)/2 * channelWidth;
 409            meanTime = (besttimeA + besttimeC-4000.)/2 * channelWidth;
 410            onlineMean = Int_t (onlineMean * channelWidth);
 411          }
 412          if(option == "cosmic") {
 413            meanTime =  Float_t((besttimeA + besttimeC)/2);
 414            onlineMean = onlineMean ;
 415          }
 416          vertex =  meanVertex -c*(timeDiff)/2.; //+ (fdZonA - fdZonC)/2;
 417          frecpoints->SetVertex(vertex);
 418          frecpoints->SetMeanTime(Int_t(meanTime));
 419          frecpoints->SetOnlineMean(Int_t(onlineMean));
 420          AliDebug(1,Form("  timeDiff %f ps,  meanTime %f ps, vertex %f cm online mean %i ",timeDiff, meanTime,vertex, onlineMean));
 421
 422        }
 423     } // if (else )raw data
 424          recTree->Fill();
 425          if(frecpoints) delete frecpoints;
 426 }
 427
 428
 429 //____________________________________________________________
 430
 431 void AliT0Reconstructor::FillESD(TTree */*digitsTree*/, TTree *clustersTree, AliESDEvent *pESD) const
 432 {
 433
 434   /***************************************************
 435   Resonstruct digits to vertex position
 436   ****************************************************/
 437
 438   AliDebug(1,Form("Start FillESD T0"));
 439
 440   TTree *treeR = clustersTree;
 441
 442    AliT0RecPoint* frecpoints= new AliT0RecPoint ();
 443     if (!frecpoints) {
 444     AliError("Reconstruct Fill ESD >> no recpoints found");
 445     return;
 446   }
 447
 448   AliDebug(1,Form("Start FillESD T0"));
 449   TBranch *brRec = treeR->GetBranch("T0");
 450   if (brRec) {
 451     brRec->SetAddress(&frecpoints);
 452   }else{
 453     AliError(Form("EXEC Branch T0 rec not found"));
 454     return;
 455   }
 456
 457     brRec->GetEntry(0);
 458     Float_t amp[24], time[24];
 459     Float_t  zPosition = frecpoints -> GetVertex();
 460     Float_t timeStart = frecpoints -> GetMeanTime() ;
 461     for ( Int_t i=0; i<24; i++) {
 462       time[i] = Float_t (frecpoints -> GetTime(i)); // ps to ns
 463       amp[i] = frecpoints -> GetAmp(i);
 464     }
 465     pESD->SetT0zVertex(zPosition); //vertex Z position
 466     pESD->SetT0(timeStart);        // interaction time
 467     pESD->SetT0time(time);         // best TOF on each PMT
 468     pESD->SetT0amplitude(amp);     // number of particles(MIPs) on each PMT
 469
 470     AliDebug(1,Form(" Z position %f cm,  T0  %f ps",zPosition , timeStart));
 471
 472 } // vertex in 3 sigma
 473
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