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       Double_t sl = (timeLED->At(ipmt) - time[ipmt])*channelWidth;
 173       Double_t qt=((TGraph*)fAmpLEDrec.At(ipmt))->Eval(sl/1000.);
 174       Float_t ampLED = qt/Float_t(mv2MIP);
 175       AliDebug(1,Form(" ipmt %i QTC %f ch QTC in MIP %f, time in chann %f (led-cfd) %f in MIPs %f",
 176                       ipmt, adc[ipmt], adc[ipmt]/Float_t(mv2MIP), time[ipmt],sl,ampLED ));
 177
 178       frecpoints->SetTime(ipmt,time[ipmt]);
 179       frecpoints->SetAmp(ipmt,adc[ipmt]/Float_t(mv2MIP));
 180       frecpoints->SetAmpLED(ipmt,ampLED);
 181     }
 182     else {
 183       time[ipmt] = 0;
 184       adc[ipmt] = 0;
 185     }
 186   }
 187
 188   for (Int_t ipmt=0; ipmt<12; ipmt++){
 189     if(time[ipmt] > 1 ) {
 190       if(time[ipmt]<besttimeC){
 191         besttimeC=time[ipmt]; //timeC
 192         pmtBestC=ipmt;
 193       }
 194     }
 195   }
 196   for ( Int_t ipmt=12; ipmt<24; ipmt++){
 197     if(time[ipmt] > 1) {
 198       if(time[ipmt]<besttimeA) {
 199         besttimeA=time[ipmt]; //timeA
 200         pmtBestA=ipmt;}
 201     }
 202   }
 203   if(besttimeA !=999999)  frecpoints->SetTimeBestA(Int_t(besttimeA));
 204   if( besttimeC != 999999 ) frecpoints->SetTimeBestC(Int_t(besttimeC));
 205   AliDebug(1,Form(" besttimeA %f ch,  besttimeC %f ch",besttimeA, besttimeC));
 206   Float_t c = 0.0299792; // cm/ps
 207   Float_t vertex = 0;
 208   if(besttimeA !=999999 && besttimeC != 999999 ){
 209     timeDiff = (besttimeC - besttimeA)*channelWidth;
 210     meanTime = (Float_t((besttimeA + besttimeC -4000)/2) * channelWidth);
 211     //    meanTime = (meanT0 - (besttimeA + besttimeC)/2) * channelWidth;
 212     vertex = c*(timeDiff)/2. + (fdZonA - fdZonC)/2; //-(lenr-lenl))/2;
 213     frecpoints->SetVertex(vertex);
 214     frecpoints->SetMeanTime(Int_t(meanTime));
 215     //online mean
 216     frecpoints->SetOnlineMean(Int_t(onlineMean * channelWidth));
 217     AliDebug(1,Form("  timeDiff %f ps,  meanTime %f ps, vertex %f cm online mean %i ps",timeDiff, meanTime,vertex, Int_t(onlineMean * channelWidth )));
 218
 219   }
 220
 221   //time in each channel as time[ipmt]-MeanTimeinThisChannel(with vertex=0)
 222   /*
 223   for (Int_t ipmt=0; ipmt<24; ipmt++) {
 224     if(time[ipmt]>1) {
 225       //      time[ipmt] = (time[ipmt] - fTime0vertex[ipmt])*channelWidth;
 226       time[ipmt] =Int_t  ( Float_t(time[ipmt]) * channelWidth);
 227       frecpoints->SetTime(ipmt,time[ipmt]);
 228     }
 229   }
 230 */
 231   clustersTree->Fill();
 232
 233   delete timeCFD;
 234   delete timeLED;
 235   delete chargeQT0;
 236   delete chargeQT1;
 237 }
 238
 239
 240 //_______________________________________________________________________
 241
 242 void AliT0Reconstructor::Reconstruct(AliRawReader* rawReader, TTree*recTree) const
 243 {
 244   // T0 raw ->
 245   // T0RecPoint writing
 246
 247   //Q->T-> coefficients !!!! should be measured!!!
 248   Int_t allData[110][5];
 249
 250   Int_t timeCFD[24], timeLED[24], chargeQT0[24], chargeQT1[24];
 251   TString option = GetOption();
 252    AliDebug(10,Form("Option: %s\n", option.Data()));
 253
 254    for (Int_t i0=0; i0<105; i0++)
 255      {
 256        for (Int_t j0=0; j0<5; j0++) allData[i0][j0]=0;
 257      }
 258
 259    Float_t besttimeA=9999999;
 260    Float_t besttimeC=9999999;
 261    Int_t pmtBestA=99999;
 262    Int_t pmtBestC=99999;
 263    Float_t timeDiff=9999999, meanTime=0;
 264    Double_t qt=0;
 265     Int_t mv2MIP = fParam-> GetmV2Mip();
 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+80][0] ;
 296            }
 297        }
 298
 299        if(option == "cosmic") {
 300          for (Int_t in=0; in<12; in++)
 301            {
 302              timeCFD[in] = allData[in+1][0] ;
 303              timeCFD[in+12] = allData[in+56+1][0] ;
 304              timeLED[in] = allData[in+12+1][0] ;
 305              timeLED[in+12] = allData[in+68+1][0] ;
 306            }
 307
 308          for (Int_t in=0; in<12;  in++)
 309            {
 310              chargeQT1[in]=allData[2*in+25][0];
 311              chargeQT0[in]=allData[2*in+26][0];
 312            }
 313
 314          for (Int_t in=12; in<24;  in++)
 315            {
 316              chargeQT1[in]=allData[2*in+57][0];
 317              chargeQT0[in]=allData[2*in+58][0];
 318            }
 319
 320        }
 321        for (Int_t in=0; in<24; in++)
 322          AliDebug(10, Form(" readed Raw %i %i %i %i %i",
 323                            in, timeLED[in],timeCFD[in],chargeQT0[in],chargeQT1[in]));
 324        Int_t onlineMean = allData[49][0];
 325
 326        Float_t time[24], adc[24];
 327        for (Int_t ipmt=0; ipmt<24; ipmt++) {
 328          if(timeCFD[ipmt]>0 && timeLED[ipmt]>0){
 329
 330            if(option == "pdc"){
 331              Double_t qt0 = Double_t(chargeQT0[ipmt]);
 332              Double_t qt1 = Double_t(chargeQT1[ipmt]);
 333              if((qt1-qt0)>0)  adc[ipmt] = Int_t(TMath::Exp( Double_t (channelWidth*(qt1-qt0)/1000.)));
 334              time[ipmt] = fCalib-> WalkCorrection( ipmt,Int_t(qt1) , timeCFD[ipmt], "pdc" ) ;
 335              Double_t sl = (timeLED[ipmt] - time[ipmt])*channelWidth;
 336              if(fAmpLEDrec.At(ipmt))
 337                qt=((TGraph*)fAmpLEDrec.At(ipmt))->Eval(sl/1000.);
 338              frecpoints->SetTime(ipmt,time[ipmt]);
 339              frecpoints->SetAmp(ipmt,adc[ipmt]/Float_t(mv2MIP));
 340              frecpoints->SetAmpLED(ipmt,qt/Float_t(mv2MIP));
 341              AliDebug(10,Form(" QTC %f mv,  time in chann %f ampLED %f",adc[ipmt] ,time[ipmt], qt));
 342              AliDebug(10,Form("  Amlitude in MIPS LED %f ,  QTC %f \n ", adc[ipmt]/Float_t(mv2MIP),qt/Float_t(mv2MIP)));
 343            }
 344            if(option == "cosmic") {
 345              //      if(ipmt == 15) continue; //skip crashed PMT
 346              if(( chargeQT1[ipmt] - chargeQT0[ipmt])>0)
 347                adc[ipmt] = chargeQT1[ipmt] - chargeQT0[ipmt];
 348              else
 349                adc[ipmt] = 0;
 350              //      time[ipmt] = fCalib-> WalkCorrection( ipmt, adc[ipmt], timeCFD[ipmt],"cosmic" ) ;
 351
 352              Double_t sl = timeLED[ipmt] - timeCFD[ipmt];
 353              time[ipmt] = fCalib-> WalkCorrection( ipmt, Int_t(sl), timeCFD[ipmt],"cosmic" ) ;
 354              //  if(fAmpLEDrec.At(ipmt))
 355              // qt=((TGraph*)fAmpLEDrec.At(ipmt))->Eval(sl);
 356              time[ipmt] = time[ipmt] - allData[0][0] + 5000;
 357              AliDebug(10,Form(" ipmt %i QTC %i , time in chann %i (led-cfd) %i ",
 358                               ipmt, Int_t(adc[ipmt]) ,Int_t(time[ipmt]),Int_t( sl)));
 359              Double_t ampMip =( (TGraph*)fAmpLED.At(ipmt))->Eval(sl);
 360              Double_t qtMip = ((TGraph*)fQTC.At(ipmt))->Eval(adc[ipmt]);
 361              AliDebug(10,Form("  Amlitude in MIPS LED %f ,  QTC %f \n ",ampMip,qtMip));
 362
 363              frecpoints->SetTime(ipmt, Float_t(time[ipmt]) );
 364              frecpoints->SetAmp(ipmt, Float_t( ampMip)); //for cosmic &pp beam
 365              frecpoints->SetAmpLED(ipmt, Float_t(qtMip));
 366
 367
 368            }
 369
 370          }
 371          else {
 372            time[ipmt] = 0;
 373            adc[ipmt] = 0;
 374          }
 375        }
 376
 377        for (Int_t ipmt=0; ipmt<12; ipmt++){
 378          if(time[ipmt] > 1 ) {
 379            if(time[ipmt]<besttimeC){
 380              besttimeC=time[ipmt]; //timeC
 381              pmtBestC=ipmt;
 382            }
 383          }
 384        }
 385        for ( Int_t ipmt=12; ipmt<24; ipmt++){
 386          if(time[ipmt] > 1) {
 387            if(time[ipmt]<besttimeA) {
 388              besttimeA=time[ipmt]; //timeA
 389              pmtBestA=ipmt;}
 390          }
 391        }
 392        if(besttimeA !=9999999)  frecpoints->SetTimeBestA(Int_t(besttimeA));
 393        if( besttimeC != 9999999 ) frecpoints->SetTimeBestC(Int_t(besttimeC));
 394        AliDebug(1,Form(" besttimeA %f ps,  besttimeC %f ps",besttimeA, besttimeC));
 395        Float_t c = 0.0299792; // cm/ps
 396        Float_t vertex = 99999;
 397        if(besttimeA <9999999 && besttimeC < 9999999 ){
 398          timeDiff = ( besttimeC - besttimeA) *channelWidth;
 399          if(option == "pdc"){
 400            //      meanTime = (besttimeA + besttimeC)/2 * channelWidth;
 401            meanTime = (besttimeA + besttimeC-4000.)/2 * channelWidth;
 402            onlineMean = Int_t (onlineMean * channelWidth);
 403          }
 404          if(option == "cosmic") {
 405            meanTime =  Float_t((besttimeA + besttimeC)/2);
 406            onlineMean = onlineMean -allData[0][0];;
 407          }
 408          vertex = c*(timeDiff)/2.+ (fdZonA - fdZonC)/2;
 409          frecpoints->SetVertex(vertex);
 410          frecpoints->SetMeanTime(Int_t(meanTime));
 411          AliDebug(1,Form("  timeDiff %f ps,  meanTime %f ps, vertex %f cm online mean %i ",timeDiff, meanTime,vertex, onlineMean));
 412
 413        }
 414      } // if (else )raw data
 415    recTree->Fill();
 416    if(frecpoints) delete frecpoints;
 417 }
 418 //____________________________________________________________
 419
 420 void AliT0Reconstructor::FillESD(TTree */*digitsTree*/, TTree *clustersTree, AliESDEvent *pESD) const
 421 {
 422
 423   /***************************************************
 424   Resonstruct digits to vertex position
 425   ****************************************************/
 426
 427   AliDebug(1,Form("Start FillESD T0"));
 428
 429   TTree *treeR = clustersTree;
 430
 431    AliT0RecPoint* frecpoints= new AliT0RecPoint ();
 432     if (!frecpoints) {
 433     AliError("Reconstruct Fill ESD >> no recpoints found");
 434     return;
 435   }
 436
 437   AliDebug(1,Form("Start FillESD T0"));
 438   TBranch *brRec = treeR->GetBranch("T0");
 439   if (brRec) {
 440     brRec->SetAddress(&frecpoints);
 441   }else{
 442     AliError(Form("EXEC Branch T0 rec not found"));
 443     return;
 444   }
 445
 446     brRec->GetEntry(0);
 447     Float_t amp[24], time[24];
 448     Float_t  zPosition = frecpoints -> GetVertex();
 449     Float_t timeStart = frecpoints -> GetMeanTime() ;
 450     for ( Int_t i=0; i<24; i++) {
 451       time[i] = Float_t (frecpoints -> GetTime(i)); // ps to ns
 452       amp[i] = frecpoints -> GetAmp(i);
 453     }
 454     pESD->SetT0zVertex(zPosition); //vertex Z position
 455     pESD->SetT0(timeStart);        // interaction time
 456     pESD->SetT0time(time);         // best TOF on each PMT
 457     pESD->SetT0amplitude(amp);     // number of particles(MIPs) on each PMT
 458
 459     AliDebug(1,Form(" Z position %f cm,  T0  %f ps",zPosition , timeStart));
 460
 461 } // vertex in 3 sigma
 462
 463
 464
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 466
 467