T0/AliT0CalibTimeEq.cxx

   1 /**************************************************************************
   2  * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
   3  *                                                                        *
   4  * Author: The ALICE Off-line Project.                                    *
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  15
  16 /* $Id$ */
  17
  18 ///////////////////////////////////////////////////////////////////////////////
  19 //                                                                           //
  20 // class for T0 calibration                       TM-AC-AM_6-02-2006
  21 // equalize time shift for each time CFD channel
  22 //                                                                           //
  23 ///////////////////////////////////////////////////////////////////////////////
  24
  25 #include "AliT0CalibTimeEq.h"
  26 #include "AliLog.h"
  27 #include <TFile.h>
  28 #include <TMath.h>
  29 #include <TF1.h>
  30 #include <TSpectrum.h>
  31 #include <TProfile.h>
  32 #include <iostream>
  33
  34 ClassImp(AliT0CalibTimeEq)
  35
  36 //________________________________________________________________
  37   AliT0CalibTimeEq::AliT0CalibTimeEq():TNamed(),
  38                                        fMeanVertex(0),
  39                                        fRmsVertex(0)
  40 {
  41   //
  42
  43 }
  44
  45 //________________________________________________________________
  46 AliT0CalibTimeEq::AliT0CalibTimeEq(const char* name):TNamed(),
  47                                        fMeanVertex(0),
  48                                        fRmsVertex(0)
  49 {
  50   //constructor
  51
  52   TString namst = "Calib_";
  53   namst += name;
  54   SetName(namst.Data());
  55   SetTitle(namst.Data());
  56 }
  57
  58 //________________________________________________________________
  59 AliT0CalibTimeEq::AliT0CalibTimeEq(const AliT0CalibTimeEq& calibda):TNamed(calibda),
  60                                        fMeanVertex(0),
  61                                        fRmsVertex(0)
  62 {
  63 // copy constructor
  64   SetName(calibda.GetName());
  65   SetTitle(calibda.GetName());
  66
  67
  68 }
  69
  70 //________________________________________________________________
  71 AliT0CalibTimeEq &AliT0CalibTimeEq::operator =(const AliT0CalibTimeEq& calibda)
  72 {
  73 // assignment operator
  74   SetName(calibda.GetName());
  75   SetTitle(calibda.GetName());
  76
  77   return *this;
  78 }
  79
  80 //________________________________________________________________
  81 AliT0CalibTimeEq::~AliT0CalibTimeEq()
  82 {
  83   //
  84   // destrictor
  85 }
  86 //________________________________________________________________
  87 void AliT0CalibTimeEq::Reset()
  88 {
  89   //reset values
  90
  91   memset(fCFDvalue,0,120*sizeof(Float_t));
  92   memset(fTimeEq,1,24*sizeof(Float_t));
  93 }
  94
  95
  96 //________________________________________________________________
  97 void  AliT0CalibTimeEq::Print(Option_t*) const
  98 {
  99   // print time values
 100
 101   printf("\n    ----    PM Arrays       ----\n\n");
 102   printf(" Time delay CFD \n");
 103   for (Int_t i=0; i<24; i++) printf(" CFD  %f ",fTimeEq[i]);
 104   printf("\n Mean Vertex %f \n", fMeanVertex);
 105 }
 106
 107
 108 //________________________________________________________________
 109 Bool_t AliT0CalibTimeEq::ComputeOnlineParams(const char* filePhys)
 110 {
 111   // compute online equalized time
 112   Float_t meandiff, sigmadiff, meanver, meancfdtime, sigmacfdtime;
 113   Double_t rms=0, rmsver=0, rmscfd=0;
 114   Int_t nent=0;
 115   Bool_t ok=false;
 116   gFile = TFile::Open(filePhys);
 117   if(!gFile) {
 118     AliError("No input PHYS data found ");
 119   }
 120   else
 121     {
 122       //    gFile->ls();
 123       ok=true;
 124       for (Int_t i=0; i<24; i++)
 125         {
 126           TH1F *cfd = (TH1F*) gFile->Get(Form("CFD1minCFD%d",i+1));
 127           TH1F *cfdtime = (TH1F*) gFile->Get(Form("CFD%d",i+1));
 128           if(!cfd) AliWarning(Form("no histograms collected by PHYS DA for channel %i", i));
 129           //      printf(" i = %d buf1 = %s\n", i, buf1);
 130           if(cfd) {
 131             GetMeanAndSigma(cfd, meandiff, sigmadiff);
 132             nent=cfd->GetEntries();
 133             if(nent<500 || cfd->GetRMS()>20. ) {
 134               ok=false;
 135               AliWarning(Form("Data is not good enouph in PMT %i - mean %f rsm %f nentries %i", i,meandiff,sigmadiff , nent));
 136
 137             }
 138             else
 139               {
 140                 ok=false;
 141                 AliWarning(Form("Data is not good enouph in PMT %i , no clean peak", i));
 142               }
 143             if(!cfd) AliWarning(Form("no histograms collected by PHYS DA for channel %i", i));
 144           }
 145             //      printf(" i = %d buf1 = %s\n", i, buf1);
 146           if(cfdtime) {
 147             GetMeanAndSigma(cfdtime,meancfdtime, sigmacfdtime);
 148             nent=cfdtime->GetEntries();
 149             if(nent<500 || sigmacfdtime>30. ) {
 150               ok=false;
 151               AliWarning(Form("Data is not good enouph in PMT %i CFD data - meancfdtime %f rsm %f nentries %i", i,meancfdtime, sigmacfdtime, nent));
 152
 153             }
 154           }
 155           else
 156             {
 157                 ok=false;
 158                 AliWarning(Form("Data is not good enouph in PMT %i , no clean peak", i));
 159               }
 160
 161
 162
 163           SetTimeEq(i,meandiff);
 164           SetTimeEqRms(i,sigmadiff);
 165           SetCFDvalue(i,0,meancfdtime);
 166           SetCFDvalue(i,0,sigmacfdtime);
 167           if (cfd) delete cfd;
 168           if (cfdtime) delete cfdtime;
 169
 170         }
 171       TH1F *ver = (TH1F*) gFile->Get("hVertex");
 172       if(!ver) AliWarning("no T0 histogram collected by PHYS DA ");
 173       if(ver) {
 174         meanver = ver->GetMean();
 175         rmsver = ver->GetRMS();
 176       }
 177       SetMeanVertex(meanver);
 178       SetRmsVertex(rmsver);
 179
 180       gFile->Close();
 181       delete gFile;
 182
 183     }
 184     return ok;
 185 }
 186
 187 //________________________________________________________________
 188 Bool_t AliT0CalibTimeEq::ComputeOfflineParams(const char* filePhys)
 189 {
 190   // compute online equalized time
 191   Float_t meandiff, sigmadiff, meanver, meancfdtime, sigmacfdtime;
 192   Double_t rms=0, rmsver=0, rmscfd=0;
 193   Int_t nent=0;
 194   Bool_t ok=false;
 195    gFile = TFile::Open(filePhys);
 196   if(!gFile) {
 197     AliError("No input PHYS data found ");
 198   }
 199   else
 200     {
 201       //    gFile->ls();
 202       ok=true;
 203       TObjArray * TzeroObj = (TObjArray*) gFile->Get("fTzeroObject");
 204       for (Int_t i=0; i<24; i++)
 205         {
 206           TH1F *cfddiff = (TH1F*)TzeroObj->At(i);
 207           TH1F *cfdtime = (TH1F*)TzeroObj->At(i+24);
 208           if(!cfddiff) AliWarning(Form("no histograms collected by PHYS DA for channel %i", i));
 209           //      printf(" i = %d buf1 = %s\n", i, buf1);
 210           if(cfddiff) {
 211             GetMeanAndSigma(cfddiff,meandiff, sigmadiff);
 212             nent=cfddiff->GetEntries();
 213             if(nent<500 || cfddiff->GetRMS()>20. ) {
 214               ok=false;
 215               AliWarning(Form("Data is not good enouph in PMT %i - mean %f rsm %f nentries %i", i,meandiff,sigmadiff, nent));
 216
 217             }
 218             else
 219               {
 220                 ok=false;
 221                 AliWarning(Form("Data is not good enouph in PMT %i , no clean peak", i));
 222               }
 223           if(!cfdtime) AliWarning(Form("no histograms collected by PHYS DA for channel %i", i));
 224           //      printf(" i = %d buf1 = %s\n", i, buf1);
 225           if(cfdtime) {
 226             GetMeanAndSigma(cfdtime,meancfdtime, sigmacfdtime);
 227             nent=cfdtime->GetEntries();
 228             if(nent<500 || cfdtime->GetRMS()>30. ) {
 229               ok=false;
 230               AliWarning(Form("Data is not good enouph in PMT %i CFD data - mean %f rsm %f nentries %i", i,meancfdtime, sigmacfdtime, nent));
 231
 232             }
 233           }
 234           else
 235             {
 236                 ok=false;
 237                 AliWarning(Form("Data is not good enouph in PMT %i , no clean peak", i));
 238               }
 239           }
 240
 241
 242           SetTimeEq(i,meandiff);
 243           SetTimeEqRms(i,sigmadiff);
 244           SetCFDvalue(i,0,meancfdtime);
 245           SetCFDvalue(i,0,sigmacfdtime);
 246           if (cfddiff) delete cfddiff;
 247           if (cfdtime) delete cfdtime;
 248
 249         }
 250       TH1F *ver = (TH1F*) gFile->Get("hVertex");
 251       if(!ver) AliWarning("no T0 histogram collected by PHYS DA ");
 252       if(ver) {
 253         meanver = ver->GetMean();
 254         rmsver = ver->GetRMS();
 255       }
 256       SetMeanVertex(meanver);
 257       SetRmsVertex(rmsver);
 258
 259       gFile->Close();
 260       delete gFile;
 261
 262     }
 263     return ok;
 264 }
 265
 266 //________________________________________________________________________
 267 void AliT0CalibTimeEq::GetMeanAndSigma(TH1F* hist,  Float_t &mean, Float_t &sigma) {
 268
 269   const double threshold = 0.5;  // threshold level with respect to maximum bin
 270   const double window = 5.;  //fit window
 271   double norm  = hist->Integral();  // normalize to one count
 272   hist->Scale(1./norm);
 273
 274   double meanEstimate, sigmaEstimate;
 275   int maxBin;
 276   maxBin        =  hist->GetMaximumBin(); //position of maximum
 277   meanEstimate  =  hist->GetBinCenter( maxBin); // mean of gaussian sitting in maximum
 278   sigmaEstimate = hist->GetRMS();
 279   TF1* fit= new TF1("fit","gaus", meanEstimate - window*sigmaEstimate, meanEstimate + window*sigmaEstimate);
 280   fit->SetParameters(hist->GetBinContent(maxBin), meanEstimate, sigmaEstimate);
 281   hist->Fit("fit","R");
 282
 283   mean  = (Float_t) fit->GetParameter(1);
 284   sigma = (Float_t) fit->GetParameter(2);
 285
 286   delete fit;
 287 }
 288
 289