CSCDbStripConditions.cc

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#include "CondFormats/CSCObjects/interface/CSCChannelTranslator.h"
#include "CondFormats/DataRecord/interface/CSCDBCrosstalkRcd.h"
#include "CondFormats/DataRecord/interface/CSCDBGainsRcd.h"
#include "CondFormats/DataRecord/interface/CSCDBNoiseMatrixRcd.h"
#include "CondFormats/DataRecord/interface/CSCDBPedestalsRcd.h"
#include "DataFormats/MuonDetId/interface/CSCDetId.h"
#include "FWCore/Utilities/interface/Exception.h"
#include "SimMuon/CSCDigitizer/src/CSCDbStripConditions.h"

CSCDbStripConditions::CSCDbStripConditions(const edm::ParameterSet &pset, edm::ConsumesCollector cc)
    : CSCStripConditions(),
      theConditions(pset, cc),
      theCapacitiveCrosstalk(pset.getParameter<double>("capacativeCrosstalk")),
      theResistiveCrosstalkScaling(pset.getParameter<double>("resistiveCrosstalkScaling")),
      theGainsConstant(pset.getParameter<double>("gainsConstant")),
      doCorrelatedNoise_(pset.getParameter<bool>("doCorrelatedNoise")) {
  //  theCapacitiveCrosstalk = = 1/maxslope/maxsignal) = 1/ (0.00231/0.143);
  // Howoever, need a bit more.  Maybe the slope gets smeared?
}

CSCDbStripConditions::~CSCDbStripConditions() {
  if (theNoisifier != nullptr)
    delete theNoisifier;
}

void CSCDbStripConditions::initializeEvent(const edm::EventSetup &es) { theConditions.initializeEvent(es); }

float CSCDbStripConditions::gain(const CSCDetId &id, int channel) const {
  return theConditions.gain(id, channel) * theGainsConstant;
}

float CSCDbStripConditions::pedestal(const CSCDetId &id, int channel) const {
  return theConditions.pedestal(id, channel);
}

float CSCDbStripConditions::pedestalSigma(const CSCDetId &id, int channel) const {
  return theConditions.pedestalSigma(id, channel);
}

void CSCDbStripConditions::crosstalk(
    const CSCDetId &id, int channel, double stripLength, bool leftRight, float &capacitive, float &resistive) const {
  resistive = theConditions.crosstalkIntercept(id, channel, leftRight) * theResistiveCrosstalkScaling;
  float slope = theConditions.crosstalkSlope(id, channel, leftRight);
  // ns before the peak where slope is max
  float maxSlopeTime = 60.;
  // some confusion about +/-
  float capacitiveFraction = fabs(slope) * maxSlopeTime;
  // theCapacitiveCrosstalk is the number needed for 100% xtalk, so
  capacitive = theCapacitiveCrosstalk * capacitiveFraction;
}

void CSCDbStripConditions::fetchNoisifier(const CSCDetId &id, int istrip) {
  std::vector<float> me(12);                          // buffer for matrix elements
  theConditions.noiseMatrixElements(id, istrip, me);  // fill it

  CSCCorrelatedNoiseMatrix matrix;
  // TODO get the pedestals right
  matrix(2, 2) = me[0];   // item.elem33;
  matrix(3, 3) = me[3];   // item.elem44;
  matrix(4, 4) = me[6];   // item.elem55;
  matrix(5, 5) = me[9];   // item.elem66;
  matrix(6, 6) = me[11];  // item.elem77;

  if (doCorrelatedNoise_) {
    matrix(2, 3) = me[1];   // item.elem34;
    matrix(2, 4) = me[2];   // item.elem35;
    matrix(3, 4) = me[4];   // item.elem45;
    matrix(3, 5) = me[5];   // item.elem46;
    matrix(4, 5) = me[7];   // item.elem56;
    matrix(4, 6) = me[8];   // item.elem57;
    matrix(5, 6) = me[10];  // item.elem67;
  }

  // the other diagonal elements can just come from the pedestal sigma
  float sigma = pedestalSigma(id, istrip);
  //@@  float scaVariance = 2 * sigma * sigma;
  //@@ The '2 *' IS strictly correct, but currently the value in the cond db is
  // 2x too large since
  //@@ it is the rms of the distribution of pedestals of all 8 time samples
  // rather than the rms of
  //@@ the average of the first two time samples
  float scaVariance = sigma * sigma;
  matrix(0, 0) = matrix(1, 1) = matrix(7, 7) = scaVariance;

  // unknown neighbors can be the average of the known neighbors
  // float avgNeighbor = (matrix(2,3)+matrix(3,4)+matrix(4,5)+matrix(5,6))/4.;
  // float avg2away = (matrix(2,4)+matrix(3,5)+matrix(4,6))/3.;
  // matrix(0,1) = matrix(1,2) = matrix(6,7) = avgNeighbor;
  // matrix(0,2) = matrix(1,3) = matrix(5,7) = avg2away;

  if (theNoisifier != nullptr)
    delete theNoisifier;
  theNoisifier = new CSCCorrelatedNoisifier(matrix);
}

bool CSCDbStripConditions::isInBadChamber(const CSCDetId &id) const { return theConditions.isInBadChamber(id); }