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"
35 ClassImp(AliT0Calibrator)
37 //____________________________________________________________________
38 AliT0Calibrator::AliT0Calibrator():TNamed(),
44 AliT0Parameters* param = AliT0Parameters::Instance();
47 fChannelWidth = param->GetChannelWidth() ;
49 for (Int_t i=0; i<24; i++){
50 fTimeDelayCFD[i] = Int_t (param->GetTimeDelayCFD(i));
51 TGraph* fu = param ->GetWalk(i);
52 fWalk.AddAtAndExpand(fu,i);
57 //_____________________________________________________________________________
59 AliT0Calibrator::AliT0Calibrator(const AliT0Calibrator &r): TNamed(),
65 // AliT0calibartor copy constructor
68 ((AliT0Calibrator &) r).Copy(*this);
72 //_____________________________________________________________________________
73 AliT0Calibrator &AliT0Calibrator::operator=(const AliT0Calibrator &r)
76 // Assignment operator
79 if (this != &r) ((AliT0Calibrator &) r).Copy(*this);
86 //____________________________________________________________________
87 Int_t AliT0Calibrator::WalkCorrection(Int_t ipmt, Int_t qt, Int_t time)
89 //slewing correcion and equalizing channels
91 Int_t timeEq=0, timeWalk=0;
92 TGraph *fu1=(TGraph*) fWalk.At(ipmt);
93 Float_t walk=fu1->Eval(Float_t(qt));
94 TH1F*hr=fu1->GetHistogram();
95 Float_t maxValue=hr->GetMaximum(50);
96 timeWalk = time + Int_t((maxValue-walk)/fChannelWidth) ;
97 timeEq= timeWalk - (fTimeDelayCFD[ipmt]-fTimeDelayCFD[0]);
98 AliDebug(10,Form(" time before %i timeWalk %i , qt %i timeEq %i \n ",
99 time,timeWalk, qt, timeEq ));