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   //  Int_t meanT0 = fParam->GetMeanT0();
 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 = c*(timeDiff)/2. + (fdZonA - fdZonC)/2; //-(lenr-lenl))/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   //time in each channel as time[ipmt]-MeanTimeinThisChannel(with vertex=0)
 228   /*
 229   for (Int_t ipmt=0; ipmt<24; ipmt++) {
 230     if(time[ipmt]>1) {
 231       //      time[ipmt] = (time[ipmt] - fTime0vertex[ipmt])*channelWidth;
 232       time[ipmt] =Int_t  ( Float_t(time[ipmt]) * channelWidth);
 233       frecpoints->SetTime(ipmt,time[ipmt]);
 234     }
 235   }
 236 */
 237   clustersTree->Fill();
 238
 239   delete timeCFD;
 240   delete timeLED;
 241   delete chargeQT0;
 242   delete chargeQT1;
 243 }
 244
 245
 246 //_______________________________________________________________________
 247
 248 void AliT0Reconstructor::Reconstruct(AliRawReader* rawReader, TTree*recTree) const
 249 {
 250   // T0 raw ->
 251   // T0RecPoint writing
 252
 253   //Q->T-> coefficients !!!! should be measured!!!
 254   Int_t allData[110][5];
 255
 256   Int_t timeCFD[24], timeLED[24], chargeQT0[24], chargeQT1[24];
 257   TString option = GetOption();
 258   AliDebug(10,Form("Option: %s\n", option.Data()));
 259
 260
 261   for (Int_t i0=0; i0<105; i0++)
 262     {
 263       for (Int_t j0=0; j0<5; j0++) allData[i0][j0]=0;
 264     }
 265
 266   Float_t besttimeA=9999999;
 267   Float_t besttimeC=9999999;
 268   Int_t pmtBestA=99999;
 269   Int_t pmtBestC=99999;
 270   Float_t timeDiff=9999999, meanTime=0;
 271   Double_t qt=0;
 272   Int_t mv2MIP = fParam-> GetmV2Mip();
 273   UInt_t type =rawReader->GetType();
 274
 275   AliT0RecPoint* frecpoints= new AliT0RecPoint ();
 276
 277   recTree->Branch( "T0", "AliT0RecPoint" ,&frecpoints, 405,1);
 278
 279
 280   AliDebug(10," before read data ");
 281   AliT0RawReader myrawreader(rawReader);
 282   if (!myrawreader.Next())
 283     AliDebug(1,Form(" no raw data found!!"));
 284   else
 285     {
 286       for (Int_t i=0; i<105; i++) {
 287         for (Int_t iHit=0; iHit<5; iHit++)
 288           {
 289             allData[i][iHit] = myrawreader.GetData(i,iHit);
 290           }
 291       }
 292
 293       Float_t channelWidth = fParam->GetChannelWidth() ;
 294
 295       //       Int_t meanT0 = fParam->GetMeanT0();
 296       if(option == "pdc"){
 297         for (Int_t in=0; in<24; in++)
 298           {
 299
 300             timeLED[in] = allData[in+1][0] ;
 301             timeCFD[in] = allData[in+25][0] ;
 302             chargeQT1[in] = allData[in+57][0] ;
 303              chargeQT0[in] = allData[in+81][0] ;
 304           }
 305        }
 306
 307       if(option == "cosmic" && type == 7 )
 308         {
 309
 310           for (Int_t in=0; in<12; in++)
 311             {
 312               timeCFD[in] = allData[in+1][0] ;
 313               timeCFD[in+12] = allData[in+56+1][0] ;
 314               timeLED[in] = allData[in+12+1][0] ;
 315               timeLED[in+12] = allData[in+68+1][0] ;
 316             }
 317
 318           for (Int_t in=0; in<12;  in++)
 319             {
 320               chargeQT1[in]=allData[2*in+25][0];
 321               chargeQT0[in]=allData[2*in+26][0];
 322             }
 323
 324            for (Int_t in=12; in<24;  in++)
 325              {
 326                chargeQT1[in]=allData[2*in+57][0];
 327                chargeQT0[in]=allData[2*in+58][0];
 328              }
 329
 330          } //cosmic with physics event
 331        for (Int_t in=0; in<24; in++)
 332          AliDebug(10, Form(" readed Raw %i %i %i %i %i",
 333                            in, timeLED[in],timeCFD[in],chargeQT0[in],chargeQT1[in]));
 334        Int_t onlineMean = allData[49][0];
 335
 336        Float_t time[24], adc[24];
 337        for (Int_t ipmt=0; ipmt<24; ipmt++) {
 338          if(timeCFD[ipmt]>0 && timeLED[ipmt]>0){
 339            //for simulated data
 340            if(option == "pdc"){
 341              Double_t qt0 = Double_t(chargeQT0[ipmt]);
 342              Double_t qt1 = Double_t(chargeQT1[ipmt]);
 343              if((qt1-qt0)>0)  adc[ipmt] = Int_t(TMath::Exp( Double_t (channelWidth*(qt1-qt0)/1000.)));
 344              time[ipmt] = fCalib-> WalkCorrection( ipmt,Int_t(qt1) , timeCFD[ipmt], "pdc" ) ;
 345              Double_t sl = (timeLED[ipmt] - time[ipmt])*channelWidth;
 346              //pp collison
 347              if( adc[ipmt]/Float_t(mv2MIP) < 20)
 348                {
 349                  if(fAmpLEDrec.At(ipmt))
 350                    qt=((TGraph*)fAmpLEDrec.At(ipmt))->Eval(sl/1000.);
 351                }
 352              else //PbPb
 353                { AliDebug(1,Form(" amplitude %f MIPs on PMT %i, write QTC in both ", (adc[ipmt]/Float_t(mv2MIP)), ipmt));
 354                  qt=adc[ipmt]/Float_t(mv2MIP);}
 355
 356              frecpoints->SetTime(ipmt,time[ipmt]);
 357              frecpoints->SetAmp(ipmt,adc[ipmt]/Float_t(mv2MIP));
 358              frecpoints->SetAmpLED(ipmt,qt/Float_t(mv2MIP));
 359              AliDebug(10,Form(" QTC %f mv,  time in chann %f ampLED %f",adc[ipmt] ,time[ipmt], qt));
 360              AliDebug(10,Form("  Amlitude in MIPS LED %f ,  QTC %f \n ", adc[ipmt]/Float_t(mv2MIP),qt/Float_t(mv2MIP)));
 361            }
 362
 363
 364              //for physics  data
 365            if(option == "cosmic" && type == 7) {
 366              if(( chargeQT1[ipmt] - chargeQT0[ipmt])>0)
 367                adc[ipmt] = chargeQT1[ipmt] - chargeQT0[ipmt];
 368              else
 369                adc[ipmt] = 0;
 370              //      time[ipmt] = fCalib-> WalkCorrection( ipmt, adc[ipmt], timeCFD[ipmt],"cosmic" ) ;
 371
 372              Double_t sl = timeLED[ipmt] - timeCFD[ipmt];
 373              time[ipmt] = fCalib-> WalkCorrection( ipmt, Int_t(sl), timeCFD[ipmt],"cosmic" ) ;
 374              time[ipmt] = time[ipmt] - allData[0][0] + 5000;
 375              AliDebug(10,Form(" ipmt %i QTC %i , time in chann %i (led-cfd) %i ",
 376                               ipmt, Int_t(adc[ipmt]) ,Int_t(time[ipmt]),Int_t( sl)));
 377              Double_t ampMip =( (TGraph*)fAmpLED.At(ipmt))->Eval(sl);
 378              Double_t qtMip = ((TGraph*)fQTC.At(ipmt))->Eval(adc[ipmt]);
 379              AliDebug(10,Form("  Amlitude in MIPS LED %f ,  QTC %f \n ",ampMip,qtMip));
 380
 381              frecpoints->SetTime(ipmt, Float_t(time[ipmt]) );
 382              frecpoints->SetAmp(ipmt, Float_t( ampMip)); //for cosmic &pp beam
 383              frecpoints->SetAmpLED(ipmt, Float_t(qtMip));
 384            } //if physic data end
 385
 386          }
 387          else {
 388            time[ipmt] = 0;
 389            adc[ipmt] = 0;
 390          }
 391        }
 392
 393        for (Int_t ipmt=0; ipmt<12; ipmt++){
 394          if(time[ipmt] > 1 ) {
 395            if(time[ipmt]<besttimeC){
 396              besttimeC=time[ipmt]; //timeC
 397              pmtBestC=ipmt;
 398            }
 399          }
 400        }
 401        for ( Int_t ipmt=12; ipmt<24; ipmt++){
 402          if(time[ipmt] > 1) {
 403            if(time[ipmt]<besttimeA) {
 404              besttimeA=time[ipmt]; //timeA
 405              pmtBestA=ipmt;}
 406          }
 407        }
 408        if(besttimeA !=9999999)  frecpoints->SetTimeBestA(Int_t(besttimeA));
 409        if( besttimeC != 9999999 ) frecpoints->SetTimeBestC(Int_t(besttimeC));
 410        AliDebug(1,Form(" besttimeA %f ps,  besttimeC %f ps",besttimeA, besttimeC));
 411        Float_t c = 0.0299792; // cm/ps
 412        Float_t vertex = 99999;
 413        if(besttimeA <9999999 && besttimeC < 9999999 ){
 414          timeDiff = ( besttimeC - besttimeA) *channelWidth;
 415          if(option == "pdc"){
 416            //      meanTime = (besttimeA + besttimeC)/2 * channelWidth;
 417            meanTime = (besttimeA + besttimeC-4000.)/2 * channelWidth;
 418            onlineMean = Int_t (onlineMean * channelWidth);
 419          }
 420          if(option == "cosmic") {
 421            meanTime =  Float_t((besttimeA + besttimeC)/2);
 422            onlineMean = onlineMean -allData[0][0];;
 423          }
 424          vertex = c*(timeDiff)/2.+ (fdZonA - fdZonC)/2;
 425          frecpoints->SetVertex(vertex);
 426          frecpoints->SetMeanTime(Int_t(meanTime));
 427          AliDebug(1,Form("  timeDiff %f ps,  meanTime %f ps, vertex %f cm online mean %i ",timeDiff, meanTime,vertex, onlineMean));
 428
 429        }
 430     } // if (else )raw data
 431          recTree->Fill();
 432          if(frecpoints) delete frecpoints;
 433 }
 434
 435
 436 //____________________________________________________________
 437
 438 void AliT0Reconstructor::FillESD(TTree */*digitsTree*/, TTree *clustersTree, AliESDEvent *pESD) const
 439 {
 440
 441   /***************************************************
 442   Resonstruct digits to vertex position
 443   ****************************************************/
 444
 445   AliDebug(1,Form("Start FillESD T0"));
 446
 447   TTree *treeR = clustersTree;
 448
 449    AliT0RecPoint* frecpoints= new AliT0RecPoint ();
 450     if (!frecpoints) {
 451     AliError("Reconstruct Fill ESD >> no recpoints found");
 452     return;
 453   }
 454
 455   AliDebug(1,Form("Start FillESD T0"));
 456   TBranch *brRec = treeR->GetBranch("T0");
 457   if (brRec) {
 458     brRec->SetAddress(&frecpoints);
 459   }else{
 460     AliError(Form("EXEC Branch T0 rec not found"));
 461     return;
 462   }
 463
 464     brRec->GetEntry(0);
 465     Float_t amp[24], time[24];
 466     Float_t  zPosition = frecpoints -> GetVertex();
 467     Float_t timeStart = frecpoints -> GetMeanTime() ;
 468     for ( Int_t i=0; i<24; i++) {
 469       time[i] = Float_t (frecpoints -> GetTime(i)); // ps to ns
 470       amp[i] = frecpoints -> GetAmp(i);
 471     }
 472     pESD->SetT0zVertex(zPosition); //vertex Z position
 473     pESD->SetT0(timeStart);        // interaction time
 474     pESD->SetT0time(time);         // best TOF on each PMT
 475     pESD->SetT0amplitude(amp);     // number of particles(MIPs) on each PMT
 476
 477     AliDebug(1,Form(" Z position %f cm,  T0  %f ps",zPosition , timeStart));
 478
 479 } // vertex in 3 sigma
 480
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 485