T0/AliT0CalibWalk.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 ///////////////////////////////////////////////////////////////////////////////
  19 //                                                                           //
  20 // class T0 walk correction      Alla Maevskaya alla@inr.ru 20.11.2007        //
  21 //                                                                           //
  22 ///////////////////////////////////////////////////////////////////////////////
  23
  24 #include "AliT0CalibWalk.h"
  25 #include "AliLog.h"
  26
  27 #include <TObjArray.h>
  28 #include <TGraph.h>
  29 #include <TFile.h>
  30 #include <TH2F.h>
  31 #include <TMath.h>
  32 #include <TSystem.h>
  33 #include <Riostream.h>
  34 #include <TSpectrum.h>
  35 #include <TProfile.h>
  36 #include <TF1.h>
  37
  38 ClassImp(AliT0CalibWalk)
  39
  40 //________________________________________________________________
  41   AliT0CalibWalk::AliT0CalibWalk():   TNamed(),
  42                                       fWalk(0),
  43                                       fAmpLEDRec(0),
  44                                       fQTC(0),
  45                                       fAmpLED(0)
  46 {
  47   //
  48 }
  49
  50 //________________________________________________________________
  51 AliT0CalibWalk::AliT0CalibWalk(const char* name):TNamed(),
  52                                       fWalk(0),
  53                                       fAmpLEDRec(0),                                                                  fQTC(0),
  54                                       fAmpLED(0)
  55
  56 {
  57   TString namst = "Calib_";
  58   namst += name;
  59   SetName(namst.Data());
  60   SetTitle(namst.Data());
  61
  62 }
  63
  64 //________________________________________________________________
  65 AliT0CalibWalk::AliT0CalibWalk(const AliT0CalibWalk& calibda) :
  66   TNamed(calibda),
  67   fWalk(0),
  68   fAmpLEDRec(0),
  69   fQTC(0),
  70   fAmpLED(0)
  71
  72 {
  73 // copy constructor
  74   SetName(calibda.GetName());
  75   SetTitle(calibda.GetName());
  76
  77
  78 }
  79
  80 //________________________________________________________________
  81 AliT0CalibWalk &AliT0CalibWalk::operator =(const AliT0CalibWalk& calibda)
  82 {
  83 // assignment operator
  84   SetName(calibda.GetName());
  85   SetTitle(calibda.GetName());
  86
  87   return *this;
  88 }
  89
  90 //________________________________________________________________
  91 AliT0CalibWalk::~AliT0CalibWalk()
  92 {
  93   //
  94 }
  95 //________________________________________________________________
  96
  97 Bool_t AliT0CalibWalk::MakeWalkCorrGraph(const char *laserFile)
  98 {
  99   //make walk corerction for preprocessor
 100   Float_t sigma,cfdmean, qtmean, ledmean;
 101   Bool_t ok=true;
 102   Float_t   mips[50];
 103
 104   gFile = TFile::Open(laserFile);
 105   if(!gFile) {
 106     AliError("No input laser data found ");
 107   }
 108   else
 109     {
 110       //      gFile->ls();
 111       TH1F* hAmp = (TH1F*) gFile->Get("hAmpLaser");
 112       Int_t nmips=0;
 113       for (Int_t ibin=0; ibin<2000; ibin++) {
 114         Float_t bincont = hAmp->GetBinContent(ibin);
 115         if(bincont>0){
 116           mips[nmips] = hAmp->GetXaxis()->GetBinCenter(ibin);
 117           cout<<ibin<<" bincont "<<bincont<<" amp "<< mips[nmips]<<endl;
 118           nmips++;
 119         }
 120       }
 121
 122       if (nmips<17) {
 123         ok=false;
 124         return ok;
 125       }
 126
 127       Float_t x1[50], y1[50];
 128       Float_t x2[50], xx2[50],y2[50];
 129       Float_t xx1[50],yy1[50], xx[50];
 130
 131       Float_t cfd0 = 0;
 132
 133       for (Int_t ii=0; ii<nmips; ii++)
 134         x1[ii] = y1[ii] = x2[ii] = y2[ii] = 0;
 135
 136       for (Int_t i=0; i<24; i++)
 137         {
 138           cfd0 = 0;
 139           for (Int_t im=0; im<nmips; im++)
 140             {
 141               TString cfd = Form("hCFD%i_%i",i+1,im+1);
 142               TString qtc = Form("hQTC%i_%i",i+1,im+1);
 143               TString led = Form("hLED%i_%i",i+1,im+1);
 144
 145               TH1F *hCFD = (TH1F*) gFile->Get(cfd.Data()) ;
 146               TH1F *hLED = (TH1F*) gFile->Get(led.Data());
 147               TH1F *hQTC = (TH1F*) gFile->Get(qtc.Data()) ;
 148               //              hCFD->SetDirectory(0);
 149               //              hQTC->SetDirectory(0);
 150               //              hLED->SetDirectory(0);
 151               if(!hCFD )
 152                 AliWarning(Form(" no CFD data in LASER DA for channel %i for amplitude %f MIPs",i,mips[im]));
 153               if(!hQTC )
 154                 AliWarning(Form(" no QTC correction data in LASER DA for channel %i for amplitude %f MIPs",i,mips[im]));
 155               if(!hLED)
 156                 AliWarning(Form(" no LED correction data in LASER DA for channel %i for amplitude %f MIPs",i,mips[im]));
 157               if( hCFD && hCFD->GetEntries()<500 ) {
 158                 ok=false;
 159                 printf("no peak in CFD spectrum for PMT %i amplitude %i\n",i,im);
 160                 return ok;
 161               }
 162               if(hCFD && hCFD->GetEntries()>500 ) {
 163                 if( hCFD->GetRMS() >= 1.5)
 164                   GetMeanAndSigma(hCFD, cfdmean, sigma);
 165                 else
 166                   cfdmean = hCFD->GetMean();
 167
 168                 Int_t   maxBin = hCFD->GetMaximumBin();
 169                 Double_t  meanEstimate = hCFD->GetBinCenter( maxBin);
 170                 if(TMath::Abs(meanEstimate - cfdmean) > 20 ) cfdmean = meanEstimate;
 171                 if (im == 0) cfd0 = cfdmean;
 172                 y1[im] =  cfdmean - cfd0;
 173               }
 174               if(hQTC && hQTC->GetEntries()>500) {
 175                 GetMeanAndSigma(hQTC, qtmean, sigma);
 176
 177                 x1[im] = qtmean;
 178                 if( x1[im] == 0) {
 179                   ok=false;
 180                   printf("no peak in QTC signal for PMT %i amplitude %i\n",i,im);
 181                   return ok;
 182                 }
 183               }
 184
 185               if( hLED && hLED->GetEntries()>500) {
 186                 GetMeanAndSigma(hLED, ledmean, sigma);
 187               }
 188               else
 189                 {
 190                   ok=false;
 191                   printf("no peak in LED spectrum for PMT %i amplitude %i\n",i,im);
 192                   return ok;
 193                 }
 194               x2[im] = ledmean;
 195               xx2[im] = x2[nmips-im-1];
 196
 197                 xx[im]=mips[im];
 198                 if (hQTC) delete  hQTC;
 199                 if (hCFD) delete  hCFD;
 200                 if (hLED) delete  hLED;
 201
 202             }
 203
 204           for (Int_t imi=0; imi<nmips; imi++)
 205             {
 206               yy1[imi] = Float_t (mips[nmips-imi-1]);
 207               xx1[imi] = x2[nmips-imi-1];
 208               //              cout<<" LED rev "<<i<<" "<<imi<<" "<<xx1[imi]<<" "<< yy1[imi]<<"nmips-imi-1 = "<< nmips-imi-1<<endl;
 209             }
 210
 211           if(i==0) cout<<"Making graphs..."<<endl;
 212
 213       TGraph *grwalkqtc = new TGraph (nmips,x1,y1);
 214       grwalkqtc->SetTitle(Form("PMT%i",i));
 215       TGraph *grwalkled = new TGraph (nmips,x2,y1);
 216       grwalkled->SetTitle(Form("PMT%i",i));
 217       fWalk.AddAtAndExpand(grwalkqtc,i);
 218       fAmpLEDRec.AddAtAndExpand(grwalkled,i);
 219       //          cout<<" add walk "<<i<<endl;
 220
 221       //fit amplitude graphs to make comparison wth new one
 222       TGraph *grampled = new TGraph (nmips,xx1,yy1);
 223       TGraph *grqtc = new TGraph (nmips,x1,xx);
 224       fQTC.AddAtAndExpand(grqtc,i);
 225       fAmpLED.AddAtAndExpand(grampled,i);
 226       //          cout<<" add amp "<<i<<endl;
 227
 228       if(i==23)
 229         cout<<"Graphs created..."<<endl;
 230         }
 231     } //if gFile exits
 232
 233   return ok;
 234 }
 235
 236 void AliT0CalibWalk::GetMeanAndSigma(TH1F* hist, Float_t &mean, Float_t &sigma)
 237 {
 238
 239   const double window = 2.;  //fit window
 240
 241   double meanEstimate, sigmaEstimate;
 242   int maxBin;
 243   maxBin        =  hist->GetMaximumBin(); //position of maximum
 244   meanEstimate  =  hist->GetBinCenter( maxBin); // mean of gaussian sitting in maximum
 245   sigmaEstimate = hist->GetRMS();
 246   TF1* fit= new TF1("fit","gaus", meanEstimate - window*sigmaEstimate, meanEstimate + window*sigmaEstimate);
 247   fit->SetParameters(hist->GetBinContent(maxBin), meanEstimate, sigmaEstimate);
 248   hist->Fit("fit","RQ","Q");
 249
 250   mean  = (Float_t) fit->GetParameter(1);
 251   sigma = (Float_t) fit->GetParameter(2);
 252
 253   delete fit;
 254 }
 255
 256
 257