+++ /dev/null
-/**************************************************************************
- * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
- * *
- * Author: The ALICE Off-line Project. *
- * Contributors are mentioned in the code where appropriate. *
- * *
- * Permission to use, copy, modify and distribute this software and its *
- * documentation strictly for non-commercial purposes is hereby granted *
- * without fee, provided that the above copyright notice appears in all *
- * copies and that both the copyright notice and this permission notice *
- * appear in the supporting documentation. The authors make no claims *
- * about the suitability of this software for any purpose. It is *
- * provided "as is" without express or implied warranty. *
- **************************************************************************/
-
-//_________________________________________________________________________
-// AliAODCaloCluster extension for PHOS to recalculate cluster
-// parameters in case of recalibration.
-//*--
-//*-- Author: Dmitri Peressounko (RRC KI)
-
-
-// --- ROOT system ---
-#include "TVector3.h"
-#include "TMath.h"
-
-// --- Standard library ---
-
-// --- AliRoot header files ---
-#include "AliLog.h"
-#include "AliPHOSGeometry.h"
-#include "AliPHOSPIDv1.h"
-#include "AliPHOSReconstructor.h"
-#include "AliPHOSAodCluster.h"
-#include "AliPHOSCalibData.h"
-#include "AliAODCaloCells.h"
-
-ClassImp(AliPHOSAodCluster)
-
-//____________________________________________________________________________
-AliPHOSAodCluster::AliPHOSAodCluster() :
- AliAODCaloCluster(),fRecalibrated(0)
-{
- // ctor
-}
-//____________________________________________________________________________
-AliPHOSAodCluster::AliPHOSAodCluster(const AliAODCaloCluster & clu) :
- AliAODCaloCluster(clu),fRecalibrated(0)
-{
- // cpy ctor
-}
-
-//____________________________________________________________________________
-AliPHOSAodCluster::~AliPHOSAodCluster()
-{
- // dtor
-}
-//____________________________________________________________________________
-void AliPHOSAodCluster::Recalibrate(AliPHOSCalibData * calibData,AliAODCaloCells *phsCells){
- //If not done yet, apply recalibration coefficients to energies list
- //NOTE that after recalibration fCellsAmpFraction contains not FRACTION but FULL energy
-
- if(fRecalibrated)
- return ;
-
- if(!calibData)
- return ;
-
- AliPHOSGeometry * phosgeom = AliPHOSGeometry::GetInstance() ;
- if(!phosgeom)
- AliFatal("AliPHOSGeometry was not contructed\n") ;
-
- Double32_t * cellsAmpFraction = GetCellsAmplitudeFraction();
-
- for(Int_t i=0; i < GetNCells(); i++){
- Int_t relId[4];
- phosgeom->AbsToRelNumbering(GetCellAbsId(i),relId) ;
- Int_t module = relId[0];
- Int_t column = relId[3];
- Int_t row = relId[2];
- Double_t energy = phsCells->GetCellAmplitude(GetCellAbsId(i)) ;
- cellsAmpFraction[i]*=energy*calibData->GetADCchannelEmc(module,column,row);
- }
-
- SetCellsAmplitudeFraction(cellsAmpFraction);
- fRecalibrated=kTRUE;
-}
-//____________________________________________________________________________
-void AliPHOSAodCluster::EvalAll(Float_t logWeight, TVector3 &vtx){
- //If recalibrated - recalculate all cluster parameters
- if(!fRecalibrated)
- return ;
-
- EvalEnergy() ; //Energy should be evaluated first
- EvalCoord(logWeight, vtx) ;
-
-}
-//____________________________________________________________________________
-void AliPHOSAodCluster::EvalEnergy(){
- if(!fRecalibrated) // no need to recalibrate
- return ;
-
- Float_t energy=0. ;
- for(Int_t iDigit=0; iDigit < GetNCells(); iDigit++) {
- energy+=GetCellAmplitudeFraction(iDigit) ;
- }
-
- SetE(energy);
- //Correct for nonlinearity later
-
-}
-//____________________________________________________________________________
-void AliPHOSAodCluster::EnergyCorrection(){
- //apply nonlinearity correction same as in AliPHOSPIDv1.
- SetE(AliPHOSReconstructor::CorrectNonlinearity(E())) ;
-}
-//____________________________________________________________________________
-void AliPHOSAodCluster::EvalPID(AliPHOSPIDv1 * /*pid*/){
- //re-evaluate identification parameters
-// pid->CalculatePID(E(),GetDispersion(),GetEmcCpvDistance(),GetTOF(),GetPID()) ;
-// pid->CalculatePID(E(),GetDispersion(),GetM20(),GetM02(),GetEmcCpvDistance(),GetTOF(),GetPID()) ;
-}
-//____________________________________________________________________________
-void AliPHOSAodCluster::EvalCoord(Float_t logWeight, TVector3 &vtx)
-{
- // Calculates new center of gravity in the local PHOS-module coordinates
- // and tranfers into global ALICE coordinates
- // Calculates Dispersion and main axis
- if(!fRecalibrated) // no need to recalibrate
- return ;
-
- Float_t wtot = 0. ;
- Int_t relid[4] ;
- Int_t phosMod=0 ;
- Float_t xMean = 0. ;
- Float_t zMean = 0. ;
-
- AliPHOSGeometry * phosgeom = AliPHOSGeometry::GetInstance() ;
- if(!phosgeom)
- AliFatal("AliPHOSGeometry was not contructed\n") ;
-
- for(Int_t iDigit=0; iDigit < GetNCells(); iDigit++) {
- Float_t xi ;
- Float_t zi ;
- phosgeom->AbsToRelNumbering(GetCellAbsId(iDigit), relid) ;
- phosgeom->RelPosInModule(relid, xi, zi);
- phosMod=relid[0] ;
- Double_t ei=GetCellAmplitudeFraction(iDigit) ;
- if (E() > 0 && ei > 0) {
- Float_t w = TMath::Max( 0., logWeight + TMath::Log(ei/E()) ) ;
- xMean+= xi * w ;
- zMean+= zi * w ;
- wtot += w ;
- }
- else
- AliError(Form("Wrong energy %f and/or amplitude %f\n", ei, E()));
- }
- if (wtot>0) {
- xMean /= wtot ;
- zMean /= wtot ;
- }
- else
- AliError(Form("Wrong weight %f\n", wtot));
-
-
-// Calculates the dispersion and second momenta
- Double_t d=0. ;
- Double_t dxx = 0.;
- Double_t dzz = 0.;
- Double_t dxz = 0.;
- for(Int_t iDigit=0; iDigit < GetNCells(); iDigit++) {
- Float_t xi ;
- Float_t zi ;
- phosgeom->AbsToRelNumbering(GetCellAbsId(iDigit), relid) ;
- phosgeom->RelPosInModule(relid, xi, zi);
- Double_t ei=GetCellAmplitudeFraction(iDigit) ;
- if (E() > 0 && ei > 0) {
- Float_t w = TMath::Max( 0., logWeight + TMath::Log(ei/E()) ) ;
- d += w*((xi-xMean)*(xi-xMean) + (zi-zMean)*(zi-zMean) ) ;
- dxx += w * xi * xi ;
- dzz += w * zi * zi ;
- dxz += w * xi * zi ;
- }
- else
- AliError(Form("Wrong energy %f and/or amplitude %f\n", ei, E()));
- }
-
- if (wtot>0) {
- d /= wtot ;
- dxx /= wtot ;
- dzz /= wtot ;
- dxz /= wtot ;
- dxx -= xMean * xMean ;
- dzz -= zMean * zMean ;
- dxz -= xMean * zMean ;
- SetM02(0.5 * (dxx + dzz) + TMath::Sqrt( 0.25 * (dxx - dzz) * (dxx - dzz) + dxz * dxz )) ;
- SetM20(0.5 * (dxx + dzz) - TMath::Sqrt( 0.25 * (dxx - dzz) * (dxx - dzz) + dxz * dxz ));
- }
- else{
- AliError(Form("Wrong weight %f\n", wtot));
- d=0. ;
- SetM20(0.) ;
- SetM02(0.) ;
- }
-
- if (d>=0)
- SetDispersion(TMath::Sqrt(d)) ;
- else
- SetDispersion(0) ;
-
-
- // Correction for the depth of the shower starting point (TDR p 127)
- Float_t para = 0.925 ;
- Float_t parb = 6.52 ;
-
- TVector3 vInc ;
- phosgeom->GetIncidentVector(vtx,phosMod,xMean,zMean,vInc) ;
-
- Float_t depthx = 0.;
- Float_t depthz = 0.;
- if (E()>0&&vInc.Y()!=0.) {
- depthx = ( para * TMath::Log(E()) + parb ) * vInc.X()/TMath::Abs(vInc.Y()) ;
- depthz = ( para * TMath::Log(E()) + parb ) * vInc.Z()/TMath::Abs(vInc.Y()) ;
- }
- else
- AliError(Form("Wrong amplitude %f\n", E()));
-
- xMean-= depthx ;
- zMean-= depthz ;
-
- //Go to the global system
- TVector3 gps ;
- phosgeom->Local2Global(phosMod, xMean, zMean, gps) ;
- SetPositionAt(gps[0],0) ;
- SetPositionAt(gps[1],1) ;
- SetPositionAt(gps[2],2) ;
-}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff