AliEmcalFastOrMonitorTask.cxx

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 * Copyright(c) 1998-2016, ALICE Experiment at CERN, All rights reserved. *
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 * Author: The ALICE Off-line Project.                                    *
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#include <algorithm>
#include <iostream>
#include <vector>
#include <THashList.h>
#include <TH2.h>
#include <THistManager.h>
#include <TLorentzVector.h>
#include <TMath.h>
#include <TObjArray.h>
#include <TParameter.h>
#include <TVector3.h>

#include "AliEmcalFastOrMonitorTask.h"
#include "AliEMCALGeometry.h"
#include "AliEMCALTriggerConstants.h"
#include "AliInputEventHandler.h"
#include "AliLog.h"
#include "AliOADBContainer.h"
#include "AliVCaloCells.h"
#include "AliVCaloTrigger.h"
#include "AliVEvent.h"
#include "AliVVertex.h"

ClassImp(AliEmcalFastOrMonitorTask)

AliEmcalFastOrMonitorTask::AliEmcalFastOrMonitorTask() :
  AliAnalysisTaskSE(),
  fHistos(nullptr),
  fGeom(nullptr),
  fLocalInitialized(false),
  fOldRun(-1),
  fRequestTrigger(AliVEvent::kAny),
  fCellData(),
  fTriggerPattern(""),
  fMaskedFastors(),
  fMaskedCells(),
  fNameMaskedFastorOADB(),
  fNameMaskedCellOADB("$ALICE_PHYSICS/OADB/EMCAL/EMCALBadChannels.root"),
  fMaskedFastorOADB(nullptr),
  fMaskedCellOADB(nullptr)
{

}

AliEmcalFastOrMonitorTask::AliEmcalFastOrMonitorTask(const char *name) :
  AliAnalysisTaskSE(name),
  fHistos(nullptr),
  fGeom(nullptr),
  fLocalInitialized(false),
  fOldRun(-1),
  fRequestTrigger(AliVEvent::kAny),
  fTriggerPattern(""),
  fMaskedFastors(),
  fMaskedCells(),
  fNameMaskedFastorOADB(),
  fNameMaskedCellOADB("$ALICE_PHYSICS/OADB/EMCAL/EMCALBadChannels.root"),
  fMaskedFastorOADB(nullptr),
  fMaskedCellOADB(nullptr)
{
  DefineOutput(1, TList::Class());
}

AliEmcalFastOrMonitorTask::~AliEmcalFastOrMonitorTask() {
  if(fMaskedFastorOADB) delete fMaskedFastorOADB;
  if(fMaskedCellOADB) delete fMaskedCellOADB;
}

void AliEmcalFastOrMonitorTask::UserCreateOutputObjects() {
  fHistos = new THistManager("fastOrHistos");

  const int kMaxCol = 48, kMaxRow = 104, kMaxFastOr = kMaxRow * kMaxCol;

  fHistos->CreateTH1("hEvents", "Number of events", 1, 0.5, 1.5);
  fHistos->CreateTH1("hFastOrFrequencyL0", "FastOr frequency at Level0", kMaxFastOr, -0.5, kMaxFastOr - 0.5);
  fHistos->CreateTH1("hFastOrFrequencyL1", "FastOr frequency at Level1", kMaxFastOr, -0.5, kMaxFastOr - 0.5);
  fHistos->CreateTH2("hFastOrAmplitude", "FastOr amplitudes", kMaxFastOr, -0.5, kMaxFastOr - 0.5, 513, -0.5, 512.5);
  fHistos->CreateTH2("hFastOrTimeSum", "FastOr time sum", kMaxFastOr, -0.5, kMaxFastOr - 0.5, 2049, -0.5, 2048.5);
  fHistos->CreateTH2("hFastOrTransverseTimeSum", "FastOr transverse time sum", kMaxFastOr, -0.5, kMaxFastOr - 0.5, 2049, -0.5, 2048.5);
  fHistos->CreateTH2("hFastOrNL0Times", "FastOr Number of L0 times", kMaxFastOr, -0.5, kMaxFastOr - 0.5, 16, -0.5, 15.5);
  fHistos->CreateTH2("hFastOrColRowFrequencyL0", "FastOr Frequency (col-row) at Level1", kMaxCol, -0.5, kMaxCol - 0.5, kMaxRow, -0.5, kMaxRow - 0.5);
  fHistos->CreateTH2("hFastOrColRowFrequencyL1", "FastOr Frequency (col-row) at Level0", kMaxCol, -0.5, kMaxCol - 0.5, kMaxRow, -0.5, kMaxRow - 0.5);
  fHistos->CreateTH2("hEnergyFastorCell", "Sum of cell energy vs. fastor Energy", 1000, 0., 20., 1000 , 0., 20.);

  // Helper histograms checking the mask status of cells and FastORs
  fHistos->CreateTH1("hMaskedFastors", "Index of masked FastOR; FastOR index; Counts", 3001, -0.5, 3000.5);
  fHistos->CreateTH1("hMaskedCells", "Index of masked cell; Cell index; Counts", 20001, -0.5, 20000.5);
  fHistos->CreateTH1("hCellEnergyCount", "Counts of non-0 cell entries; Cell index; Counts", 20001, -0.5, 20000.5);

  // THnSparse for fastor-by-fastor energy decalibration
  TAxis fastorIDAxis(4992, -0.5, 4991.5), offlineaxis(200, 0., 20.), onlineaxis(200, 0., 20.), cellmaskaxis(5, -0.5, 4.5);
  const TAxis *sparseaxis[4] = {&fastorIDAxis, &offlineaxis, &onlineaxis, &cellmaskaxis};
  fastorIDAxis.SetNameTitle("fastorAbsID", "FastOR abs. ID");
  offlineaxis.SetNameTitle("offlinenergy", "E_{2x2 cells} (GeV)");
  onlineaxis.SetNameTitle("onlineenergy", "E_{FastOR} (GeV)");
  cellmaskaxis.SetNameTitle("maskedcells", "Number of masked cells");
  fHistos->CreateTHnSparse("hFastOrEnergyOfflineOnline", "FastOr Offline vs Online energy", 4, sparseaxis);

  PostData(1, fHistos->GetListOfHistograms());
}

void AliEmcalFastOrMonitorTask::ExecOnce(){
  fGeom = AliEMCALGeometry::GetInstanceFromRunNumber(InputEvent()->GetRunNumber());

  int nrow = fGeom->GetTriggerMappingVersion() == 2 ? 104 : 64;
  fCellData.Allocate(48, nrow);

  if(fNameMaskedCellOADB.Length()){
    fMaskedCellOADB = new AliOADBContainer("AliEMCALBadChannels");
    fMaskedCellOADB->InitFromFile(fNameMaskedCellOADB, "AliEMCALBadChannels");
  }

  if(fNameMaskedFastorOADB.Length()){
    fMaskedFastorOADB = new AliOADBContainer("AliEmcalMaskedFastors");
    fMaskedFastorOADB->InitFromFile(fNameMaskedFastorOADB, "AliEmcalMaskedFastors");
  }
}

void AliEmcalFastOrMonitorTask::RunChanged(Int_t newrun){
  // Load masked FastOR data
  if(fMaskedFastorOADB){
    AliInfoStream() << "Loading masked cells for run " << newrun << std::endl;
    fMaskedFastors.clear();
    TObjArray *maskedfastors = static_cast<TObjArray *>(fMaskedFastorOADB->GetObject(newrun));
    if(maskedfastors && maskedfastors->GetEntries()){
      for(auto masked : *maskedfastors){
        TParameter<int> *fastOrAbsID = static_cast<TParameter<int> *>(masked);
        fMaskedFastors.push_back(fastOrAbsID->GetVal());
        fHistos->FillTH1("hMaskedFastors", fastOrAbsID->GetVal());
      }
      std::sort(fMaskedFastors.begin(), fMaskedFastors.end(), std::less<int>());
    }
  }

  // Load masked cell data
  if(fMaskedCellOADB){
    AliInfoStream() << "Loading masked cells for run " << newrun << std::endl;
    fMaskedCells.clear();
    TObjArray *maskhistos = static_cast<TObjArray *>(fMaskedCellOADB->GetObject(newrun));
    if(maskhistos && maskhistos->GetEntries()){
      for(auto mod : *maskhistos){
        TH2 *modhist = static_cast<TH2 *>(mod);
        TString modname = modhist->GetName();
        AliDebugStream(1) << "Reading bad channels from histogram " << modname << std::endl;
        modname.ReplaceAll("EMCALBadChannelMap_Mod", "");
        Int_t modid = modname.Atoi();
        for(int icol = 0; icol < 48; icol++){
          for(int irow = 0; irow < 24; irow++){
            if(modhist->GetBinContent(icol, irow) > 0.){
              int cellindex = fGeom->GetAbsCellIdFromCellIndexes(modid, irow, icol);
              fMaskedCells.push_back(cellindex);
              fHistos->FillTH1("hMaskedCells", cellindex);
            }
          }
        }
      }
      std::sort(fMaskedCells.begin(), fMaskedCells.end(), std::less<int>());
    }
  }
}

void AliEmcalFastOrMonitorTask::UserExec(Option_t *) {
  if(!fLocalInitialized){
    ExecOnce();
    fLocalInitialized = true;
  }

  // Run change
  if(InputEvent()->GetRunNumber() != fOldRun){
    RunChanged(InputEvent()->GetRunNumber());
    fOldRun = InputEvent()->GetRunNumber();
  }

  // Check trigger
  if(!(fInputHandler->IsEventSelected() & fRequestTrigger)) return;
  if(fTriggerPattern.Length()){
    if(!TString(InputEvent()->GetFiredTriggerClasses()).Contains(fTriggerPattern)) return;
  }

  const AliVVertex *vtx = fInputEvent->GetPrimaryVertex();
  Double_t vtxpos[3];
  vtx->GetXYZ(vtxpos);

  LoadEventCellData();

  fHistos->FillTH1("hEvents", 1);

  AliVCaloTrigger *triggerdata = InputEvent()->GetCaloTrigger("EMCAL");
  triggerdata->Reset();
  Int_t nl0times, l1timesum, fastOrID, globCol, globRow;
  Float_t amp;
  while(triggerdata->Next()){
    triggerdata->GetAmplitude(amp);
    triggerdata->GetNL0Times(nl0times);
    triggerdata->GetL1TimeSum(l1timesum);
    triggerdata->GetPosition(globCol, globRow);
    fGeom->GetTriggerMapping()->GetAbsFastORIndexFromPositionInEMCAL(globCol, globRow, fastOrID);
    if(amp > 1e-5){
      fHistos->FillTH2("hFastOrColRowFrequencyL0", globCol, globRow);
      fHistos->FillTH1("hFastOrFrequencyL0", fastOrID);
    }
    if(l1timesum){
      fHistos->FillTH2("hFastOrColRowFrequencyL1", globCol, globRow);
      fHistos->FillTH1("hFastOrFrequencyL1", fastOrID);
    }
    if(std::find(fMaskedFastors.begin(), fMaskedFastors.end(), fastOrID) == fMaskedFastors.end()){
      fHistos->FillTH2("hFastOrAmplitude", fastOrID, amp);
      fHistos->FillTH2("hFastOrTimeSum", fastOrID, l1timesum);
      fHistos->FillTH2("hFastOrNL0Times", fastOrID, nl0times);
      fHistos->FillTH2("hFastOrTransverseTimeSum", fastOrID, GetTransverseTimeSum(fastOrID, l1timesum, vtxpos));
      fHistos->FillTH2("hEnergyFastorCell", fCellData(globCol, globRow), l1timesum * EMCALTrigger::kEMCL1ADCtoGeV);
      int ncellmasked = 0;
      int fastorCells[4];
      fGeom->GetTriggerMapping()->GetCellIndexFromFastORIndex(fastOrID, fastorCells);
      for(int icell = 0; icell < 4; icell++){
        if(std::find(fMaskedCells.begin(), fMaskedCells.end(), fastorCells[icell]) != fMaskedCells.end()) ncellmasked++;
      }
      double energydata[4] = {
            static_cast<double>(fastOrID),
            fCellData(globCol, globRow),
            l1timesum * EMCALTrigger::kEMCL1ADCtoGeV,
            static_cast<double>(ncellmasked)
      };
      fHistos->FillTHnSparse("hFastOrEnergyOfflineOnline", energydata);
    }
  }

  PostData(1, fHistos->GetListOfHistograms());
}

void AliEmcalFastOrMonitorTask::LoadEventCellData(){
   fCellData.Reset();
   AliVCaloCells *emccells = InputEvent()->GetEMCALCells();
   for(int icell = 0; icell < emccells->GetNumberOfCells(); icell++){
     int position = emccells->GetCellNumber(icell);
     double amplitude = emccells->GetAmplitude(icell);
     if(amplitude > 0){
       fHistos->FillTH1("hCellEnergyCount", position);
       if(std::find(fMaskedCells.begin(), fMaskedCells.end(), position) != fMaskedCells.end()){
         AliErrorStream() << "Non-0 cell energy " << amplitude << " found for masked cell " << position << std::endl;
       }
       int absFastor, col, row;
       fGeom->GetTriggerMapping()->GetFastORIndexFromCellIndex(position, absFastor);
       fGeom->GetPositionInEMCALFromAbsFastORIndex(absFastor, col, row);
       fCellData(col, row) += amplitude;
     }
   }
}

Double_t AliEmcalFastOrMonitorTask::GetTransverseTimeSum(Int_t fastorAbsID, Double_t adc, const Double_t *vertex) const{
  Int_t cellIDs[4];
  fGeom->GetTriggerMapping()->GetCellIndexFromFastORIndex(fastorAbsID, cellIDs);
  std::vector<double> eta, phi;
  for(int i = 0l; i < 4; i++){
    double etatmp, phitmp;
    fGeom->EtaPhiFromIndex(cellIDs[i], etatmp, phitmp);
    eta.push_back(etatmp);
    phi.push_back(phitmp);
  }

  // Calculate FastOR position: for the approximation take mean eta and phi
  // Radius is taken from the geometry
  TVector3 fastorPos, vertexPos(vertex[0], vertex[1], vertex[2]);
  fastorPos.SetPtEtaPhi(fGeom->GetIPDistance(), TMath::Mean(eta.begin(), eta.end()), TMath::Mean(phi.begin(), phi.end()));
  fastorPos -= vertexPos;

  TLorentzVector evec(fastorPos, adc);
  return evec.Et();
}