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 <iostream.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 {
  48   //constructor
  49
  50  AliDebug(1,"Start reconstructor ");
  51
  52   fParam = AliT0Parameters::Instance();
  53   fParam->Init();
  54   for (Int_t i=0; i<24; i++){
  55     TGraph* gr = fParam ->GetAmpLEDRec(i);
  56     fAmpLEDrec.AddAtAndExpand(gr,i) ;
  57   }
  58   fdZonC = TMath::Abs(fParam->GetZPositionShift("T0/C/PMT1"));
  59   fdZonA = TMath::Abs(fParam->GetZPositionShift("T0/A/PMT15"));
  60
  61 }
  62 //____________________________________________________________________
  63
  64 AliT0Reconstructor::AliT0Reconstructor(const AliT0Reconstructor &r):
  65   AliReconstructor(r),
  66                                              fdZonA(0),
  67                                              fdZonC(0),
  68                                              fZposition(0),
  69                                              fParam(NULL),
  70   fAmpLEDrec()
  71  {
  72   //
  73   // AliT0Reconstructor copy constructor
  74   //
  75
  76   ((AliT0Reconstructor &) r).Copy(*this);
  77
  78 }
  79
  80 //_____________________________________________________________________________
  81 AliT0Reconstructor &AliT0Reconstructor::operator=(const AliT0Reconstructor &r)
  82 {
  83   //
  84   // Assignment operator
  85   //
  86
  87   if (this != &r) ((AliT0Reconstructor &) r).Copy(*this);
  88   return *this;
  89
  90 }
  91
  92 //_____________________________________________________________________________
  93
  94 void AliT0Reconstructor::Reconstruct(TTree*digitsTree, TTree*clustersTree) const
  95
  96 {
  97   // T0 digits reconstruction
  98   // T0RecPoint writing
  99
 100
 101   TArrayI * timeCFD = new TArrayI(24);
 102   TArrayI * timeLED = new TArrayI(24);
 103   TArrayI * chargeQT0 = new TArrayI(24);
 104   TArrayI * chargeQT1 = new TArrayI(24);
 105
 106   AliT0Calibrator *calib=new AliT0Calibrator();
 107
 108   //  Int_t mV2Mip = param->GetmV2Mip();
 109   //mV2Mip = param->GetmV2Mip();
 110   Float_t channelWidth = fParam->GetChannelWidth() ;
 111   Int_t meanT0 = fParam->GetMeanT0();
 112
 113   AliDebug(1,Form("Start DIGITS reconstruction "));
 114
 115   TBranch *brDigits=digitsTree->GetBranch("T0");
 116   AliT0digit *fDigits = new AliT0digit() ;
 117   if (brDigits) {
 118     brDigits->SetAddress(&fDigits);
 119   }else{
 120     AliError(Form("EXEC Branch T0 digits not found"));
 121      return;
 122   }
 123
 124   digitsTree->GetEvent(0);
 125   digitsTree->GetEntry(0);
 126   brDigits->GetEntry(0);
 127   fDigits->GetTimeCFD(*timeCFD);
 128   fDigits->GetTimeLED(*timeLED);
 129   fDigits->GetQT0(*chargeQT0);
 130   fDigits->GetQT1(*chargeQT1);
 131
 132
 133   Float_t besttimeA=999999;
 134   Float_t besttimeC=999999;
 135   Int_t pmtBestA=99999;
 136   Int_t pmtBestC=99999;
 137   Float_t timeDiff=999999, meanTime=0;
 138
 139
 140
 141   AliT0RecPoint* frecpoints= new AliT0RecPoint ();
 142   clustersTree->Branch( "T0", "AliT0RecPoint" ,&frecpoints, 405,1);
 143
 144   Float_t time[24], adc[24];
 145   for (Int_t ipmt=0; ipmt<24; ipmt++) {
 146     if(timeCFD->At(ipmt)>0 ){
 147       Double_t qt0 = Double_t(chargeQT0->At(ipmt));
 148       Double_t qt1 = Double_t(chargeQT1->At(ipmt));
 149       if((qt1-qt0)>0)  adc[ipmt] = TMath::Exp( Double_t (channelWidth*(qt1-qt0)/1000));
 150       time[ipmt] = calib-> WalkCorrection( ipmt, Int_t(qt1) , timeCFD->At(ipmt), "pdc" ) ;
 151
 152       //LED
 153       Double_t sl = (timeLED->At(ipmt) - time[ipmt])*channelWidth;
 154       Double_t qt=((TGraph*)fAmpLEDrec.At(ipmt))->Eval(sl/1000.);
 155       frecpoints->SetTime(ipmt,time[ipmt]);
 156       frecpoints->SetAmp(ipmt,adc[ipmt]);
 157       frecpoints->SetAmpLED(ipmt,qt);
 158     }
 159     else {
 160       time[ipmt] = 0;
 161       adc[ipmt] = 0;
 162     }
 163   }
 164
 165   for (Int_t ipmt=0; ipmt<12; ipmt++){
 166     if(time[ipmt] > 1 ) {
 167       if(time[ipmt]<besttimeC){
 168         besttimeC=time[ipmt]; //timeC
 169         pmtBestC=ipmt;
 170       }
 171     }
 172   }
 173   for ( Int_t ipmt=12; ipmt<24; ipmt++){
 174     if(time[ipmt] > 1) {
 175       if(time[ipmt]<besttimeA) {
 176         besttimeA=time[ipmt]; //timeA
 177         pmtBestA=ipmt;}
 178     }
 179   }
 180   if(besttimeA !=999999)  frecpoints->SetTimeBestA(Int_t(besttimeA));
 181   if( besttimeC != 999999 ) frecpoints->SetTimeBestC(Int_t(besttimeC));
 182   AliDebug(1,Form(" besttimeA %f ps,  besttimeC %f ps",besttimeA, besttimeC));
 183   Float_t c = 0.0299792; // cm/ps
 184   Float_t vertex = 0;
 185   if(besttimeA !=999999 && besttimeC != 999999 ){
 186     timeDiff =(besttimeC - besttimeA)*channelWidth;
 187     meanTime = (meanT0 - (besttimeA + besttimeC)/2) * channelWidth;
 188     vertex = c*(timeDiff)/2. + (fdZonA - fdZonC)/2; //-(lenr-lenl))/2;
 189     AliDebug(1,Form("  timeDiff %f ps,  meanTime %f ps, vertex %f cm",timeDiff, meanTime,vertex ));
 190     frecpoints->SetVertex(vertex);
 191     frecpoints->SetMeanTime(Int_t(meanTime));
 192
 193   }
 194   //time in each channel as time[ipmt]-MeanTimeinThisChannel(with vertex=0)
 195   for (Int_t ipmt=0; ipmt<24; ipmt++) {
 196     if(time[ipmt]>1) {
 197 //      time[ipmt] = (time[ipmt] - fTime0vertex[ipmt])*channelWidth;
 198       time[ipmt] = time[ipmt] * channelWidth;
 199       frecpoints->SetTime(ipmt,time[ipmt]);
 200     }
 201   }
 202   clustersTree->Fill();
 203
 204   delete timeCFD;
 205   delete timeLED;
 206   delete chargeQT0;
 207   delete chargeQT1;
 208 }
 209
 210
 211 //_______________________________________________________________________
 212
 213 void AliT0Reconstructor::Reconstruct(AliRawReader* rawReader, TTree*recTree) const
 214 {
 215   // T0 raw ->
 216   // T0RecPoint writing
 217
 218   //Q->T-> coefficients !!!! should be measured!!!
 219   Int_t allData[110][5];
 220
 221   Int_t timeCFD[24], timeLED[24], chargeQT0[24], chargeQT1[24];
 222   TString option = GetOption();
 223   AliDebug(1,Form("Option: %s\n", option.Data()));
 224
 225   for (Int_t i0=0; i0<105; i0++)
 226     {
 227       for (Int_t j0=0; j0<5; j0++) allData[i0][j0]=0;
 228     }
 229
 230
 231   AliDebug(10," before read data ");
 232   AliT0RawReader myrawreader(rawReader);
 233   if (!myrawreader.Next())
 234     AliDebug(1,"No T0 raw data found!");
 235
 236   for (Int_t i=0; i<105; i++) {
 237     for (Int_t iHit=0; iHit<5; iHit++)
 238       {
 239         allData[i][iHit] = myrawreader.GetData(i,iHit);
 240       }
 241   }
 242   AliT0Calibrator *calib = new AliT0Calibrator();
 243
 244   //  Int_t mV2Mip = param->GetmV2Mip();
 245   //mV2Mip = param->GetmV2Mip();
 246   Float_t channelWidth = fParam->GetChannelWidth() ;
 247
 248   Int_t meanT0 = fParam->GetMeanT0();
 249   if(option == "pdc"){
 250     for (Int_t in=0; in<24; in++)
 251       {
 252
 253         timeLED[in] = allData[in+1][0];
 254         timeCFD[in] = allData[in+25][0];
 255         chargeQT1[in] = allData[in+57][0];
 256         chargeQT0[in] = allData[in+80][0];
 257       }
 258   }
 259
 260   if(option == "cosmic") {
 261     for (Int_t in=0; in<12; in++)
 262       {
 263         timeCFD[in] = allData[in+1][0];
 264         timeCFD[in+12] = allData[in+1][0];
 265         timeLED[in] = allData[in+12+1][0];
 266         timeLED[in+12] = allData[in+68+1][0];
 267       }
 268
 269     for (Int_t in=0; in<24;  in=in+2)
 270       {
 271       Int_t cc=in/2;
 272       chargeQT1[cc]=allData[in+25][0];
 273       chargeQT0[cc]=allData[in+26][0];
 274       }
 275     for (Int_t in=24; in<48;  in=in+2)
 276     {
 277       Int_t cc=in/2;
 278       chargeQT1[cc]=allData[in+57][0];
 279       chargeQT0[cc]=allData[in+58][0];
 280     }
 281
 282   }
 283     for (Int_t in=0; in<24; in++)
 284        AliDebug(10, Form(" readed Raw %i %i %i %i %i", in, timeLED[in],timeCFD[in],chargeQT0[in],chargeQT1[in]));
 285
 286
 287   Float_t besttimeA=9999999;
 288   Float_t besttimeC=9999999;
 289   Int_t pmtBestA=99999;
 290   Int_t pmtBestC=99999;
 291   Float_t timeDiff=9999999, meanTime=0;
 292   Double_t qt=0;
 293
 294   AliT0RecPoint* frecpoints= new AliT0RecPoint ();
 295
 296   recTree->Branch( "T0", "AliT0RecPoint" ,&frecpoints, 405,1);
 297
 298
 299   Float_t time[24], adc[24];
 300   for (Int_t ipmt=0; ipmt<24; ipmt++) {
 301     if(timeCFD[ipmt]>0 ){
 302
 303       if(option == "pdc"){
 304         Double_t qt0 = Double_t(chargeQT0[ipmt]);
 305         Double_t qt1 = Double_t(chargeQT1[ipmt]);
 306         if((qt1-qt0)>0)  adc[ipmt] = TMath::Exp( Double_t (channelWidth*(qt1-qt0)/1000));
 307
 308         time[ipmt] = calib-> WalkCorrection( ipmt,Int_t(qt1) , timeCFD[ipmt] ) ;
 309         Double_t sl = (timeLED[ipmt] - time[ipmt])*channelWidth;
 310         if(fAmpLEDrec.At(ipmt))
 311           qt=((TGraph*)fAmpLEDrec.At(ipmt))->Eval(sl/1000.);
 312         frecpoints->SetTime(ipmt,time[ipmt]);
 313         frecpoints->SetAmp(ipmt,adc[ipmt]);
 314         frecpoints->SetAmpLED(ipmt,qt);
 315         AliDebug(1,Form(" QTC %f mv,  time in chann %f ",adc[ipmt] ,time[ipmt]));
 316       }
 317       if(option == "cosmic") {
 318         Float_t qt0 = Float_t(chargeQT0[ipmt]);
 319         Float_t qt1 = Float_t(chargeQT1[ipmt]);
 320         if((qt1-qt0)>0)  adc[ipmt] = qt1-qt0;
 321
 322         time[ipmt] = calib-> WalkCorrection( ipmt, Int_t(adc[ipmt]), timeCFD[ipmt] ) ;
 323         Double_t sl = timeLED[ipmt] - time[ipmt];
 324         if(fAmpLEDrec.At(ipmt))
 325           qt=((TGraph*)fAmpLEDrec.At(ipmt))->Eval(sl/1000.);
 326         frecpoints->SetTime(ipmt,time[ipmt]);
 327         frecpoints->SetAmp(ipmt,adc[ipmt]);
 328         frecpoints->SetAmpLED(ipmt,qt);
 329         AliDebug(10,Form(" ipmt %i QTC %i , time in chann %i led %i ",
 330                         ipmt, Int_t(adc[ipmt]) ,Int_t(time[ipmt]),Int_t( qt)));
 331       }
 332
 333     }
 334     else {
 335       time[ipmt] = 0;
 336       adc[ipmt] = 0;
 337     }
 338   }
 339
 340   for (Int_t ipmt=0; ipmt<12; ipmt++){
 341     if(time[ipmt] > 1 ) {
 342       if(time[ipmt]<besttimeC){
 343         besttimeC=time[ipmt]; //timeC
 344         pmtBestC=ipmt;
 345       }
 346     }
 347   }
 348   for ( Int_t ipmt=12; ipmt<24; ipmt++){
 349     if(time[ipmt] > 1) {
 350       if(time[ipmt]<besttimeA) {
 351         besttimeA=time[ipmt]; //timeA
 352         pmtBestA=ipmt;}
 353     }
 354   }
 355   if(besttimeA !=9999999)  frecpoints->SetTimeBestA(Int_t(besttimeA));
 356   if( besttimeC != 9999999 ) frecpoints->SetTimeBestC(Int_t(besttimeC));
 357   AliDebug(1,Form(" besttimeA %f ps,  besttimeC %f ps",besttimeA, besttimeC));
 358   Float_t c = 0.0299792; // cm/ps
 359   Float_t vertex = 99999;
 360   if(besttimeA <9999999 && besttimeC < 9999999 ){
 361     timeDiff =( besttimeC - besttimeA) *channelWidth;
 362     if(option == "pdc")
 363       meanTime = (meanT0 - (besttimeA + besttimeC)/2) * channelWidth;
 364     if(option == "cosmic")   meanTime =  (besttimeA + besttimeC)/2;
 365     vertex = c*(timeDiff)/2. + (fdZonA - fdZonC)/2;
 366     AliDebug(1,Form("  timeDiff %f ps,  meanTime %f ps, vertex %f cm",timeDiff, meanTime,vertex ));
 367     frecpoints->SetVertex(vertex);
 368     frecpoints->SetMeanTime(Int_t(meanTime));
 369
 370   }
 371   //time in each channel as time[ipmt]-MeanTimeinThisChannel(with vertex=0)
 372   /*
 373   for (Int_t ipmt=0; ipmt<24; ipmt++) {
 374     if(time[ipmt]>1) {
 375       time[ipmt] = (time[ipmt] - fTime0vertex[ipmt])*channelWidth;
 376       frecpoints->SetTime(ipmt,time[ipmt]);
 377     }
 378     }
 379   */
 380   recTree->Fill();
 381 }
 382 //____________________________________________________________
 383
 384 void AliT0Reconstructor::FillESD(TTree */*digitsTree*/, TTree *clustersTree, AliESDEvent *pESD) const
 385 {
 386
 387   /***************************************************
 388   Resonstruct digits to vertex position
 389   ****************************************************/
 390
 391   AliDebug(1,Form("Start FillESD T0"));
 392
 393   TTree *treeR = clustersTree;
 394
 395    AliT0RecPoint* frecpoints= new AliT0RecPoint ();
 396     if (!frecpoints) {
 397     AliError("Reconstruct Fill ESD >> no recpoints found");
 398     return;
 399   }
 400
 401   AliDebug(1,Form("Start FillESD T0"));
 402   TBranch *brRec = treeR->GetBranch("T0");
 403   if (brRec) {
 404     brRec->SetAddress(&frecpoints);
 405   }else{
 406     AliError(Form("EXEC Branch T0 rec not found"));
 407     return;
 408   }
 409
 410     brRec->GetEntry(0);
 411     Float_t amp[24], time[24];
 412     Float_t  zPosition = frecpoints -> GetVertex();
 413     Float_t timeStart = frecpoints -> GetMeanTime() ;
 414     for ( Int_t i=0; i<24; i++) {
 415       time[i] = Float_t (frecpoints -> GetTime(i)); // ps to ns
 416       amp[i] = frecpoints -> GetAmp(i);
 417     }
 418     pESD->SetT0zVertex(zPosition); //vertex Z position
 419     pESD->SetT0(timeStart);        // interaction time
 420     pESD->SetT0time(time);         // best TOF on each PMT
 421     pESD->SetT0amplitude(amp);     // number of particles(MIPs) on each PMT
 422
 423     AliDebug(1,Form(" Z position %f cm,  T0  %f ps",zPosition , timeStart));
 424
 425 } // vertex in 3 sigma
 426
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 430
 431