1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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 **************************************************************************/
17 /***********************************************************************
18 * this class doing calibration during reconstruction
20 * - equalizing channels
21 * - applying walk corrections
23 * Alla.Maevskaya@cern.ch
25 **********************************************************************/
27 //#include <Riostream.h>
30 #include "AliT0Parameters.h"
31 #include "AliT0Calibrator.h"
34 //#include "iostream.h"
36 ClassImp(AliT0Calibrator)
38 //____________________________________________________________________
39 AliT0Calibrator::AliT0Calibrator():TNamed(),
45 AliT0Parameters* param = AliT0Parameters::Instance();
48 fChannelWidth = param->GetChannelWidth() ;
50 for (Int_t i=0; i<24; i++){
51 fTimeDelayCFD[i] = Int_t (param->GetTimeDelayCFD(i));
52 TGraph* fu = param ->GetWalk(i);
53 fWalk.AddAtAndExpand(fu,i);
58 //_____________________________________________________________________________
60 AliT0Calibrator::AliT0Calibrator(const AliT0Calibrator &r): TNamed(),
66 // AliT0calibartor copy constructor
69 ((AliT0Calibrator &) r).Copy(*this);
73 //_____________________________________________________________________________
74 AliT0Calibrator &AliT0Calibrator::operator=(const AliT0Calibrator &r)
77 // Assignment operator
80 if (this != &r) ((AliT0Calibrator &) r).Copy(*this);
87 //____________________________________________________________________
88 Int_t AliT0Calibrator::WalkCorrection(Int_t ipmt, Int_t qt, Int_t time, TString option)
90 //slewing correcion and equalizing channels
94 Int_t timeEq=0, timeWalk=0;
95 TGraph *fu1=(TGraph*) fWalk.At(ipmt);
97 walk=fu1->Eval(Float_t(qt));
98 TH1F*hr=fu1->GetHistogram();
99 maxValue=hr->GetMaximum(50);
101 if (option == "pdc") {
102 timeWalk = time + Int_t((maxValue-walk)/fChannelWidth) ;
103 timeEq= timeWalk - (fTimeDelayCFD[ipmt]-fTimeDelayCFD[0]);
105 if (option == "cosmic") {
106 timeWalk = time + Int_t((maxValue-walk)) ;
107 if (ipmt<12) timeEq= timeWalk - (fTimeDelayCFD[ipmt]-fTimeDelayCFD[0]);
108 if (ipmt>11) timeEq= timeWalk - (fTimeDelayCFD[ipmt]-fTimeDelayCFD[12]);
110 AliDebug(10,Form(" ipmt %i time before %i timeWalk %i , qt %i timeEq %i \n ",
111 ipmt, time,timeWalk, qt, timeEq ));