TOPHitRateCounter Class Reference

Class for monitoring beam background hit rates of TOP. More...

#include <TOPHitRateCounter.h>

Inheritance diagram for TOPHitRateCounter:

Collaboration diagram for TOPHitRateCounter:

Classes
struct	TreeStruct
	tree structure More...

Public Member Functions
	TOPHitRateCounter (double timeOffset, double timeWindow)
	Constructor. More...
virtual void	initialize (TTree *tree) override
	Class initializer: set branch addresses and other staf. More...
virtual void	clear () override
	Clear time-stamp buffer to prepare for 'accumulate'.
virtual void	accumulate (unsigned timeStamp) override
	Accumulate hits. More...
virtual void	normalize (unsigned timeStamp) override
	Normalize accumulated hits (e.g. More...

Private Member Functions
void	setActiveFractions ()
	Sets fractions of active channels.

Private Attributes
double	m_timeOffset = 0
	time offset of hits [ns]
double	m_timeWindow = 0
	time window in which to count hits [ns]
TreeStruct	m_rates
	tree variables
std::map< unsigned, TreeStruct >	m_buffer
	average rates in time stamps
StoreArray< TOPDigit >	m_digits
	collection of digits
DBObjPtr< TOPCalChannelMask >	m_channelMask
	channel mask
TH1F *	m_hits = 0
	time distribution of hits in wide range
TH1F *	m_hitsInWindow = 0
	time distribution of hits inside timeWindow
double	m_activeFractions [16] = {0}
	fractions of active channels in slots
double	m_activeTotal = 0
	total fraction of active channels

Detailed Description

Class for monitoring beam background hit rates of TOP.

Hit rates are given in MHz per PMT and are already corrected for different pixel efficiencies and masked-out pixels.

Definition at line 43 of file TOPHitRateCounter.h.

Constructor & Destructor Documentation

TOPHitRateCounter()

TOPHitRateCounter ( double  timeOffset, double  timeWindow  )

inline

Constructor.

Parameters

timeOffset	time offset to be subtracted from hit times [ns]
timeWindow	time window (full size) in which to count hits [ns]

Definition at line 73 of file TOPHitRateCounter.h.

           :
 

Member Function Documentation

accumulate()

void accumulate ( unsigned  timeStamp )

overridevirtual

Accumulate hits.

Parameters

timeStamp

time stamp

Implements HitRateBase.

Definition at line 56 of file TOPHitRateCounter.cc.

    {
      // check if data are available
      if (not m_digits.isValid()) return;
 
      // get buffer element
      auto& rates = m_buffer[timeStamp];
 
      // increment event counter
      rates.numEvents++;
 
      // accumulate hits (weighted by efficiency correction)
      const auto* topgp = TOP::TOPGeometryPar::Instance();
      for (const auto& digit : m_digits) {
        if (digit.getHitQuality() != TOPDigit::c_Good) continue;
        m_hits->Fill(digit.getTime());
 
        if (fabs(digit.getTime() - m_timeOffset) > m_timeWindow / 2) continue;
        m_hitsInWindow->Fill(digit.getTime());
 
        auto effi = topgp->getRelativePixelEfficiency(digit.getModuleID(),
                                                      digit.getPixelID());
        float wt = std::min(1.0 / effi, 10.0);
        rates.slotRates[digit.getModuleID() - 1] += wt;
        rates.averageRate += wt;
      }
 
      // set flag to true to indicate the rates are valid
      rates.valid = true;
 
    }

initialize()

void initialize ( TTree *  tree )

overridevirtual

Class initializer: set branch addresses and other staf.

Parameters

tree	a valid TTree pointer

Implements HitRateBase.

Definition at line 28 of file TOPHitRateCounter.cc.

normalize()

void normalize ( unsigned  timeStamp )

overridevirtual

Normalize accumulated hits (e.g.

transform to rates) and prepare for TTree::Fill

Parameters

timeStamp

time stamp

Implements HitRateBase.

Definition at line 88 of file TOPHitRateCounter.cc.

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

• background/modules/BeamBkgHitRateMonitor/include/TOPHitRateCounter.h
• background/modules/BeamBkgHitRateMonitor/src/TOPHitRateCounter.cc