T0/AliT0CalibTimeEq.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   *
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  10  * copies and that both the copyright notice and this permission notice   *
  11  * appear in the supporting documentation. The authors make no claims     *
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  13  * provided "as is" without express or implied warranty.                  *
  14  **************************************************************************/
  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   Double_t mean=0, meanver=0;
 113   Double_t rms=0, rmsver=0;
 114   Int_t nent=0;
 115   Bool_t ok=false;
 116   Int_t npeaks = 20;
 117   Int_t sigma=3;
 118   Bool_t down=false;
 119   Int_t index[20];
 120   Int_t nfound=0;
 121   gFile = TFile::Open(filePhys);
 122   if(!gFile) {
 123     AliError("No input PHYS data found ");
 124   }
 125   else
 126     {
 127       //    gFile->ls();
 128       ok=true;
 129       Char_t buf1[30];
 130       for (Int_t i=0; i<24; i++)
 131         {
 132           sprintf(buf1,"CFD1minCFD%d",i+1);
 133           TH1F *cfd = (TH1F*) gFile->Get(buf1);
 134           if(!cfd) AliWarning(Form("no histograms collected by PHYS DA for channel %i", i));
 135           //      printf(" i = %d buf1 = %s\n", i, buf1);
 136           if(cfd) {
 137             TSpectrum *s = new TSpectrum(2*npeaks,1);
 138             nfound = s->Search(cfd,sigma," ",0.1);
 139             if(nfound!=0){
 140               Float_t *xpeak = s->GetPositionX();
 141               TMath::Sort(nfound, xpeak, index,down);
 142               Float_t xp = xpeak[index[0]];
 143               Double_t hmax = xp+3*sigma;
 144               Double_t hmin = xp-3*sigma;
 145               cfd->GetXaxis()->SetRangeUser(hmin-20,hmax+20);
 146               mean=cfd->GetMean();
 147               rms=cfd->GetRMS();
 148               nent=cfd->GetEntries();
 149               if(nent<500 || rms>20. ) {
 150                 ok=false;
 151                 AliWarning(Form("Data is not good enouph in PMT %i - mean %f rsm %f nentries %i", i,mean, rms, 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,mean);
 164            SetTimeEqRms(i,rms);
 165           if (cfd) delete cfd;
 166         }
 167       TH1F *ver = (TH1F*) gFile->Get("hVertex");
 168       if(!ver) AliWarning("no T0 histogram collected by PHYS DA ");
 169       if(ver) {
 170         meanver = ver->GetMean();
 171         rmsver = ver->GetRMS();
 172       }
 173       SetMeanVertex(meanver);
 174       SetRmsVertex(rmsver);
 175
 176       gFile->Close();
 177       delete gFile;
 178
 179     }
 180     return ok;
 181 }
 182
 183