CSCStripDigiValidation.cc

Go to the documentation of this file.

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

CSCStripDigiValidation::CSCStripDigiValidation(const edm::InputTag &inputTag, edm::ConsumesCollector &&iC)
    : CSCBaseValidation(inputTag),
      thePedestalSum(0),
      thePedestalCovarianceSum(0),
      thePedestalCount(0),
      thePedestalTimeCorrelationPlot(nullptr),
      thePedestalNeighborCorrelationPlot(nullptr),
      theNDigisPerChamberPlot(nullptr) {
  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);
}