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
  38 ClassImp(AliT0Reconstructor)
  39
  40   AliT0Reconstructor:: AliT0Reconstructor(): AliReconstructor(),
  41                                              fdZonA(0),
  42                                              fdZonC(0),
  43                                              fZposition(0),
  44                                              fParam(NULL),
  45                                              fAmpLEDrec()
  46 {
  47   //constructor
  48
  49  AliDebug(1,"Start reconstructor ");
  50
  51   fParam = AliT0Parameters::Instance();
  52   fParam->Init();
  53   for (Int_t i=0; i<24; i++){
  54     TGraph* gr = fParam ->GetAmpLEDRec(i);
  55     fAmpLEDrec.AddAtAndExpand(gr,i) ;
  56 //    fTime0vertex[i]= fParam->GetTimeV0(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) ) ;
 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   TArrayI * timeCFD = new TArrayI(24);
 222   TArrayI * timeLED = new TArrayI(24);
 223   TArrayI * chargeQT0 = new TArrayI(24);
 224   TArrayI * chargeQT1 = new TArrayI(24);
 225
 226    for (Int_t i=0; i<110; i++) {
 227      allData[i][0]=0;
 228    }
 229
 230    AliT0RawReader myrawreader(rawReader);
 231    if (!myrawreader.Next())
 232      AliDebug(1,Form(" no raw data found!! %i", myrawreader.Next()));
 233    for (Int_t i=0; i<110; i++) {
 234      allData[i][0]=myrawreader.GetData(i,0);
 235    }
 236   AliT0Calibrator *calib = new AliT0Calibrator();
 237
 238   //  Int_t mV2Mip = param->GetmV2Mip();
 239   //mV2Mip = param->GetmV2Mip();
 240   Float_t channelWidth = fParam->GetChannelWidth() ;
 241
 242   Int_t meanT0 = fParam->GetMeanT0();
 243
 244   for (Int_t in=0; in<24; in++)
 245      {
 246        timeLED->AddAt(allData[in+1][0],in);
 247        timeCFD->AddAt(allData[in+25][0],in);
 248        chargeQT1->AddAt(allData[in+57][0],in);
 249        chargeQT0->AddAt(allData[in+80][0],in);
 250        AliDebug(10, Form(" readed Raw %i %i %i %i %i", in, timeLED->At(in),timeCFD->At(in),chargeQT0->At(in),chargeQT1->At(in)));
 251      }
 252
 253   Float_t besttimeA=999999;
 254   Float_t besttimeC=999999;
 255   Int_t pmtBestA=99999;
 256   Int_t pmtBestC=99999;
 257   Float_t timeDiff=999999, meanTime=0;
 258
 259
 260   AliT0RecPoint* frecpoints= new AliT0RecPoint ();
 261
 262   recTree->Branch( "T0", "AliT0RecPoint" ,&frecpoints, 405,1);
 263
 264
 265   Float_t time[24], adc[24];
 266   for (Int_t ipmt=0; ipmt<24; ipmt++) {
 267     if(timeCFD->At(ipmt)>0 ){
 268       Double_t qt0 = Double_t(chargeQT0->At(ipmt));
 269       Double_t qt1 = Double_t(chargeQT1->At(ipmt));
 270       if((qt1-qt0)>0)  adc[ipmt] = TMath::Exp( Double_t (channelWidth*(qt1-qt0)/1000));
 271       //      time[ipmt] = channelWidth * (calib-> WalkCorrection( ipmt,qt1 , timeCFD->At(ipmt) ) ) ;
 272       time[ipmt] = calib-> WalkCorrection( ipmt,Int_t(qt1) , timeCFD->At(ipmt) ) ;
 273       Double_t sl = (timeLED->At(ipmt) - time[ipmt])*channelWidth;
 274       Double_t qt=((TGraph*)fAmpLEDrec.At(ipmt))->Eval(sl/1000.);
 275       frecpoints->SetTime(ipmt,time[ipmt]);
 276       frecpoints->SetAmp(ipmt,adc[ipmt]);
 277       frecpoints->SetAmpLED(ipmt,qt);
 278     AliDebug(1,Form(" QTC %f mv,  QTC  %f MIPS time in chann %f time %f ",adc[ipmt], adc[ipmt]/50.,time[ipmt], time[ipmt]*channelWidth));
 279
 280     }
 281     else {
 282       time[ipmt] = 0;
 283       adc[ipmt] = 0;
 284     }
 285   }
 286
 287   for (Int_t ipmt=0; ipmt<12; ipmt++){
 288     if(time[ipmt] > 1 ) {
 289       if(time[ipmt]<besttimeC){
 290         besttimeC=time[ipmt]; //timeC
 291         pmtBestC=ipmt;
 292       }
 293     }
 294   }
 295   for ( Int_t ipmt=12; ipmt<24; ipmt++){
 296     if(time[ipmt] > 1) {
 297       if(time[ipmt]<besttimeA) {
 298         besttimeA=time[ipmt]; //timeA
 299         pmtBestA=ipmt;}
 300     }
 301   }
 302   if(besttimeA !=999999)  frecpoints->SetTimeBestA(Int_t(besttimeA));
 303   if( besttimeC != 999999 ) frecpoints->SetTimeBestC(Int_t(besttimeC));
 304   AliDebug(1,Form(" besttimeA %f ps,  besttimeC %f ps",besttimeA, besttimeC));
 305   Float_t c = 0.0299792; // cm/ps
 306   Float_t vertex = 0;
 307   if(besttimeA !=999999 && besttimeC != 999999 ){
 308     timeDiff = (besttimeC - besttimeA)*channelWidth;
 309     meanTime = (meanT0 - (besttimeA + besttimeC)/2) * channelWidth;
 310     vertex = c*(timeDiff)/2. + (fdZonA - fdZonC)/2; //-(lenr-lenl))/2;
 311     AliDebug(1,Form("  timeDiff %f ps,  meanTime %f ps, vertex %f cm",timeDiff, meanTime,vertex ));
 312     frecpoints->SetVertex(vertex);
 313     frecpoints->SetMeanTime(Int_t(meanTime));
 314
 315   }
 316   //time in each channel as time[ipmt]-MeanTimeinThisChannel(with vertex=0)
 317   /*
 318   for (Int_t ipmt=0; ipmt<24; ipmt++) {
 319     if(time[ipmt]>1) {
 320       time[ipmt] = (time[ipmt] - fTime0vertex[ipmt])*channelWidth;
 321       frecpoints->SetTime(ipmt,time[ipmt]);
 322     }
 323     }
 324   */
 325   recTree->Fill();
 326
 327
 328   delete timeCFD;
 329   delete timeLED;
 330   delete chargeQT0;
 331   delete chargeQT1;
 332
 333 }
 334 //____________________________________________________________
 335
 336 void AliT0Reconstructor::FillESD(TTree */*digitsTree*/, TTree *clustersTree, AliESDEvent *pESD) const
 337 {
 338
 339   /***************************************************
 340   Resonstruct digits to vertex position
 341   ****************************************************/
 342
 343   AliDebug(1,Form("Start FillESD T0"));
 344
 345   TTree *treeR = clustersTree;
 346
 347    AliT0RecPoint* frecpoints= new AliT0RecPoint ();
 348     if (!frecpoints) {
 349     AliError("Reconstruct Fill ESD >> no recpoints found");
 350     return;
 351   }
 352
 353   AliDebug(1,Form("Start FillESD T0"));
 354   TBranch *brRec = treeR->GetBranch("T0");
 355   if (brRec) {
 356     brRec->SetAddress(&frecpoints);
 357   }else{
 358     AliError(Form("EXEC Branch T0 rec not found"));
 359     return;
 360   }
 361
 362     brRec->GetEntry(0);
 363     Float_t amp[24], time[24];
 364     Float_t  zPosition = frecpoints -> GetVertex();
 365     Float_t timeStart = frecpoints -> GetMeanTime() ;
 366     for ( Int_t i=0; i<24; i++) {
 367       time[i] = Float_t (frecpoints -> GetTime(i)); // ps to ns
 368       amp[i] = frecpoints -> GetAmp(i);
 369     }
 370     pESD->SetT0zVertex(zPosition); //vertex Z position
 371     pESD->SetT0(timeStart);        // interaction time
 372     pESD->SetT0time(time);         // best TOF on each PMT
 373     pESD->SetT0amplitude(amp);     // number of particles(MIPs) on each PMT
 374
 375     AliDebug(1,Form(" Z position %f cm,  T0  %f ps",zPosition , timeStart));
 376
 377 } // vertex in 3 sigma
 378
 379
 380
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 382
 383