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HcalHitCorrection Class Reference

Applies a correction for time slewing Makes bigger signals come at a delayed time. More...

#include <SimCalorimetry/HcalSimAlgos/interface/HcalHitCorrection.h>

Inheritance diagram for HcalHitCorrection:

List of all members.

Public Types
typedef std::map< DetId, double >	ChargeSumsByChannel
Public Member Functions
double	charge (const PCaloHit &hit) const
	how much charge we expect from this hit
void	clear ()
virtual void	correct (PCaloHit &hit) const
	applies the delay to the hit
double	delay (const PCaloHit &hit) const
	how much delay this hit will get
void	fillChargeSums (MixCollection< PCaloHit > &hits)
	HcalHitCorrection (const CaloVSimParameterMap *parameterMap)
int	timeBin (const PCaloHit &hit) const
	which time bin the peak of the signal will fall in
double	timeOfFlight (const DetId &id) const
	simple average approximation
virtual	~HcalHitCorrection ()
Private Attributes
ChargeSumsByChannel	theChargeSumsForTimeBin [10]
const CaloVSimParameterMap *	theParameterMap

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Detailed Description

Applies a correction for time slewing Makes bigger signals come at a delayed time.

Rick Wilkinson

Definition at line 17 of file HcalHitCorrection.h.

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Member Typedef Documentation

typedef std::map<DetId, double> HcalHitCorrection::ChargeSumsByChannel

Definition at line 20 of file HcalHitCorrection.h.

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Constructor & Destructor Documentation

HcalHitCorrection::HcalHitCorrection

(

const CaloVSimParameterMap *

parameterMap

)

Definition at line 10 of file HcalHitCorrection.cc.

: theParameterMap(parameterMap)
{
}

virtual HcalHitCorrection::~HcalHitCorrection

(

)

[inline, virtual]

Definition at line 23 of file HcalHitCorrection.h.

{}

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Member Function Documentation

double HcalHitCorrection::charge

(

const PCaloHit &

hit

)

const

how much charge we expect from this hit

Definition at line 41 of file HcalHitCorrection.cc.

References detId, PCaloHit::energy(), PCaloHit::id(), python::trackProbabilityAnalysis_cff::parameters, CaloSimParameters::simHitToPhotoelectrons(), CaloVSimParameterMap::simParameters(), and theParameterMap.

Referenced by delay(), and fillChargeSums().

{
  DetId detId(hit.id());
  const CaloSimParameters & parameters = theParameterMap->simParameters(detId);
  double simHitToCharge = parameters.simHitToPhotoelectrons()
                        * parameters.photoelectronsToAnalog();
  return hit.energy() * simHitToCharge;
}

void HcalHitCorrection::clear

(

void

)

Definition at line 33 of file HcalHitCorrection.cc.

References i, and theChargeSumsForTimeBin.

Referenced by HcalDigiProducer::produce().

{
  for(int i = 0; i < 10; ++i)
  {
    theChargeSumsForTimeBin[i].clear();
  }
}

void HcalHitCorrection::correct

(

PCaloHit &

hit

)

const [virtual]

applies the delay to the hit

Implements CaloVHitCorrection.

Definition at line 84 of file HcalHitCorrection.cc.

References delay(), PCaloHit::energyEM(), PCaloHit::energyHad(), PCaloHit::geantTrackId(), PCaloHit::id(), and PCaloHit::time().

                                                    {
  // replace the hit with a new one, with a time delay
  hit = PCaloHit(hit.id(), hit.energyEM(), hit.energyHad(), hit.time()+delay(hit), hit.geantTrackId());
}

double HcalHitCorrection::delay

(

const PCaloHit &

hit

)

const

how much delay this hit will get

Definition at line 51 of file HcalHitCorrection.cc.

References DetId::Calo, charge(), HcalTimeSlew::delay(), DetId::det(), detId, end, Exception, HcalForward, HcalOuter, PCaloHit::id(), LogDebug, HcalTimeSlew::Medium, HcalTimeSlew::Slow, HcalZDCDetId::SubdetectorId, DetId::subdetId(), theChargeSumsForTimeBin, and timeBin().

Referenced by correct().

{
  // HO goes slow, HF shouldn't be used at all
  //ZDC not used for the moment

  DetId detId(hit.id());
  if(detId.det()==DetId::Calo && detId.subdetId()==HcalZDCDetId::SubdetectorId) return 0;
  HcalDetId hcalDetId(hit.id());
  if(hcalDetId.subdet() == HcalForward) return 0;  
  HcalTimeSlew::BiasSetting biasSetting = (hcalDetId.subdet() == HcalOuter) ?
                                          HcalTimeSlew::Slow :
                                          HcalTimeSlew::Medium;
  double delay = 0.;
  int tbin = timeBin(hit);
  if(tbin >= 0 && tbin < 10)
  {
    ChargeSumsByChannel::const_iterator totalChargeItr = theChargeSumsForTimeBin[tbin].find(detId);
    if(totalChargeItr == theChargeSumsForTimeBin[tbin].end())
    {
      throw cms::Exception("HcalHitCorrection") << "Cannot find HCAL charge sum for hit " << hit;
    }
    double totalCharge = totalChargeItr->second;
    delay = HcalTimeSlew::delay(totalCharge, biasSetting);
    LogDebug("HcalHitCorrection") << "TIMESLEWcharge " << charge(hit) 
                                  << "  totalcharge " << totalCharge 
                                  << " olddelay "  << HcalTimeSlew::delay(charge(hit), biasSetting) 
                                  << " newdelay " << delay;
  }

  return delay;
}

void HcalHitCorrection::fillChargeSums

(

MixCollection< PCaloHit > &

hits

)

Definition at line 16 of file HcalHitCorrection.cc.

References MixCollection< T >::begin(), charge(), MixCollection< T >::end(), LogDebug, theChargeSumsForTimeBin, and timeBin().

Referenced by HcalDigiProducer::produce(), and HcalTBDigiProducer::produce().

{
  for(MixCollection<PCaloHit>::MixItr hitItr = hits.begin();
      hitItr != hits.end(); ++hitItr)
  {
    LogDebug("HcalHitCorrection") << "HcalHitCorrection::Hit 0x" << std::hex
                                  << hitItr->id() << std::dec;
    int tbin = timeBin(*hitItr);
    LogDebug("HcalHitCorrection") << "HcalHitCorrection::Hit tbin" << tbin;
    if(tbin >= 0 && tbin < 10) 
    {  
      theChargeSumsForTimeBin[tbin][DetId(hitItr->id())] += charge(*hitItr);
    }
  }
}

int HcalHitCorrection::timeBin

(

const PCaloHit &

hit

)

const

which time bin the peak of the signal will fall in

Definition at line 90 of file HcalHitCorrection.cc.

References CaloSimParameters::binOfMaximum(), PCaloHit::id(), python::trackProbabilityAnalysis_cff::parameters, CaloVSimParameterMap::simParameters(), t, theParameterMap, PCaloHit::time(), timeOfFlight(), and CaloSimParameters::timePhase().

Referenced by delay(), and fillChargeSums().

{
  const CaloSimParameters & parameters = theParameterMap->simParameters(DetId(hit.id()));
  double t = hit.time() - timeOfFlight(DetId(hit.id())) + parameters.timePhase();
  return static_cast<int> (t / 25) + parameters.binOfMaximum() - 1;
}

double HcalHitCorrection::timeOfFlight

(

const DetId &

id

)

const

simple average approximation

Definition at line 98 of file HcalHitCorrection.cc.

References DetId::Calo, DetId::det(), Exception, HcalBarrel, HcalEndcap, HcalForward, HcalOuter, HcalZDCDetId::SubdetectorId, and DetId::subdetId().

Referenced by timeBin().

{
  if(detId.det()==DetId::Calo && detId.subdetId()==HcalZDCDetId::SubdetectorId)
    return 37.666; 
  switch(detId.subdetId())
    {
    case HcalBarrel:
      return 8.4;
      break;
    case HcalEndcap:
      return 13.;
      break;
    case HcalOuter:
      return 18.7;
      break;
    case HcalForward:
      return 37.;
      break;
    default:
      throw cms::Exception("HcalHitCorrection") << "Bad Hcal subdetector " << detId.subdetId();
      break;
    }
}

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Member Data Documentation

ChargeSumsByChannel HcalHitCorrection::theChargeSumsForTimeBin[10] [private]

Definition at line 48 of file HcalHitCorrection.h.

Referenced by clear(), delay(), and fillChargeSums().

const CaloVSimParameterMap* HcalHitCorrection::theParameterMap [private]

Definition at line 46 of file HcalHitCorrection.h.

Referenced by charge(), and timeBin().

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The documentation for this class was generated from the following files:

• SimCalorimetry/HcalSimAlgos/interface/HcalHitCorrection.h
• SimCalorimetry/HcalSimAlgos/src/HcalHitCorrection.cc

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