CSCStripDigiValidation.cc

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#include "Validation/MuonCSCDigis/src/CSCStripDigiValidation.h"
#include "DataFormats/Common/interface/Handle.h"
#include "FWCore/MessageLogger/interface/MessageLogger.h"
#include "DQMServices/Core/interface/DQMStore.h"


CSCStripDigiValidation::CSCStripDigiValidation(const edm::InputTag & inputTag,
                                               edm::ConsumesCollector && iC):
  CSCBaseValidation(inputTag),
  thePedestalSum(0),
  thePedestalCovarianceSum(0),
  thePedestalCount(0),
  thePedestalTimeCorrelationPlot(0),
  thePedestalNeighborCorrelationPlot(0),
  theNDigisPerChamberPlot(0)
{
  strips_Token_ = iC.consumes<CSCStripDigiCollection>(inputTag);
}

CSCStripDigiValidation::~CSCStripDigiValidation()
{
}

void CSCStripDigiValidation::bookHistograms(DQMStore::IBooker & iBooker,
                                            bool doSim)
{
  thePedestalPlot = iBooker.book1D("CSCPedestal", "CSC Pedestal ", 400, 550, 650);
  theAmplitudePlot = iBooker.book1D("CSCStripAmplitude", "CSC Strip Amplitude", 200, 0, 2000);
  theRatio4to5Plot = iBooker.book1D("CSCStrip4to5", "CSC Strip Ratio tbin 4 to tbin 5", 100, 0, 1);
  theRatio6to5Plot = iBooker.book1D("CSCStrip6to5", "CSC Strip Ratio tbin 6 to tbin 5", 120, 0, 1.2);
  theNDigisPerLayerPlot = iBooker.book1D("CSCStripDigisPerLayer", "Number of CSC Strip Digis per layer", 48, 0, 48);
  theNDigisPerEventPlot = iBooker.book1D("CSCStripDigisPerEvent", "Number of CSC Strip Digis per event", 100, 0, 500); 
  if(doSim) {
    for(int i = 0; i < 10; ++i)
    {
      char title1[200];
      sprintf(title1, "CSCStripDigiResolution%d", i+1);
      theResolutionPlots[i] = iBooker.book1D(title1, title1, 100, -5, 5);
    }
  }
}

void CSCStripDigiValidation::analyze(const edm::Event& e,
                                     const edm::EventSetup&)
{
  edm::Handle<CSCStripDigiCollection> strips;
  e.getByToken(strips_Token_, strips);
  if (!strips.isValid()) {
    edm::LogError("CSCDigiValidation") << "Cannot get strips by label "
                                       << theInputTag.encode();
  }

 unsigned nDigisPerEvent = 0;

 for (CSCStripDigiCollection::DigiRangeIterator j=strips->begin(); j!=strips->end(); j++) {
    std::vector<CSCStripDigi>::const_iterator digiItr = (*j).second.first;
    std::vector<CSCStripDigi>::const_iterator last = (*j).second.second;
    int nDigis = last-digiItr;
    nDigisPerEvent += nDigis;
    theNDigisPerLayerPlot->Fill(nDigis);

    double maxAmplitude = 0.;
    // int maxStrip = 0;

    for( ; digiItr != last; ++digiItr) {
      // average up the pedestals
      std::vector<int> adcCounts = digiItr->getADCCounts();
      thePedestalSum += adcCounts[0];
      thePedestalSum += adcCounts[1];
      thePedestalCount += 2;
      float pedestal = thePedestalSum/thePedestalCount;
      if(adcCounts[4]-pedestal > maxAmplitude)
      {
      //  maxStrip = digiItr->getStrip();
        maxAmplitude = adcCounts[4]-pedestal;
      }

      // if we have enough pedestal statistics
      if(thePedestalCount > 100)
      {
        fillPedestalPlots(*digiItr);

        // see if it's big enough to count as "signal"
        if(adcCounts[5] > (thePedestalSum/thePedestalCount + 100))
        {
          fillSignalPlots(*digiItr);
        }
      }
    }
  } // loop over digis

  theNDigisPerEventPlot->Fill(nDigisPerEvent);
}


void CSCStripDigiValidation::fillPedestalPlots(const CSCStripDigi & digi)
{
  std::vector<int> adcCounts = digi.getADCCounts();
  thePedestalPlot->Fill(adcCounts[0]);
  thePedestalPlot->Fill(adcCounts[1]);
}



void CSCStripDigiValidation::fillSignalPlots(const CSCStripDigi & digi)
{
  std::vector<int> adcCounts = digi.getADCCounts();
  float pedestal = thePedestalSum/thePedestalCount;
  theAmplitudePlot->Fill(adcCounts[4] - pedestal);
  theRatio4to5Plot->Fill( (adcCounts[3]-pedestal) / (adcCounts[4]-pedestal) );
  theRatio6to5Plot->Fill( (adcCounts[5]-pedestal) / (adcCounts[4]-pedestal) );
}


void CSCStripDigiValidation::plotResolution(const PSimHit & hit, int strip,
                                           const CSCLayer * layer, int chamberType)
{
  double hitX = hit.localPosition().x();
  double hitY = hit.localPosition().y();
  double digiX = layer->geometry()->xOfStrip(strip, hitY);
  theResolutionPlots[chamberType-1]->Fill(digiX - hitX);
}