JFIT::JK40 Struct Reference

Auxiliary class for converting various rates to expectation values of the number of hits within a given time interval. More...

#include <JK40.hh>

Inheritance diagram for JFIT::JK40:

Public Types
typedef std::vector< double >	JL1_t
	Type definition of expectation values of number of multiple hits. More...

Public Member Functions
	JK40 ()
	Default constructor. More...
	JK40 (const JTimeRange &T_ns, const double R_Hz)
	Constructor for single PMT. More...
	JK40 (const JTimeRange &T_ns, const size_t numberOfPMTs, const JK40Rates &rates_Hz)
	Constructor for modules. More...
double	getY0 () const
	Get expectation value for number of single hits. More...
double	getY1 (const size_t M) const
	Get expectation value for number of multiple hits. More...
double	getP (size_t M) const
	Get probability to observe a hit with given multiplicity. More...

Protected Attributes
double	__y0
	expectation value of number of single hits More...
JL1_t	__y1
	expectation values of number of multiple hits More...

Detailed Description

Auxiliary class for converting various rates to expectation values of the number of hits within a given time interval.

Definition at line 30 of file JK40.hh.

Member Typedef Documentation

typedef std::vector<double> JFIT::JK40::JL1_t

Type definition of expectation values of number of multiple hits.

Definition at line 34 of file JK40.hh.

Constructor & Destructor Documentation

JFIT::JK40::JK40 ( )

inline

Default constructor.

Definition at line 40 of file JK40.hh.

           :
      __y0(0.0),
      __y1()
    {}

JFIT::JK40::JK40 ( const JTimeRange &  T_ns, const double  R_Hz  )

inline

Constructor for single PMT.

Parameters

T_ns	time range [ns]
R_Hz	K40 singles rate [Hz]

Definition at line 52 of file JK40.hh.

                                 :
      __y0(0.0),
      __y1()
    {
      const double T_s = (T_ns.getUpperLimit() - T_ns.getLowerLimit()) * 1.0e-9;   // period [s]
      
      __y0 = R_Hz * T_s;
    }

JFIT::JK40::JK40 ( const JTimeRange &  T_ns, const size_t  numberOfPMTs, const JK40Rates &  rates_Hz  )

inline

Constructor for modules.

Parameters

T_ns	time range [ns]
numberOfPMTs	number of PMTs in module
rates_Hz	K40 singles and multiples rates [Hz]

Definition at line 70 of file JK40.hh.

                                     :
      __y0(0.0),
      __y1()
    {
      const double T_s = (T_ns.getUpperLimit() - T_ns.getLowerLimit())* 1.0e-9;   // period [s]
      
      __y0 = numberOfPMTs * rates_Hz.getSinglesRate() * T_s;

      // genuine coincidences
      
      for (size_t M = rates_Hz.getLowerL1Multiplicity(); M <= rates_Hz.getUpperL1Multiplicity(); ++M) {
        __y1.push_back(rates_Hz.getMultiplesRate(M) * T_s);
      }

      // random coincidences
      
      if (__y1.empty()) {
        __y1.push_back(0.0);
      }

      __y1[0] +=  __y0 * (1.0 - exp(-__y0));
    }

Member Function Documentation

double JFIT::JK40::getY0 ( ) const

inline

Get expectation value for number of single hits.

Returns

expectation value

Definition at line 101 of file JK40.hh.

    {
      return __y0;
    }

double JFIT::JK40::getY1 ( const size_t  M ) const

inline

Get expectation value for number of multiple hits.

Parameters

M	multiplicity (M >= 2)

Returns

expectation value

Definition at line 113 of file JK40.hh.

    {
      if (M >= 2 && M - 2 < __y1.size()) 
        return __y1[M-2];
      else
        return 0.0;
    }

double JFIT::JK40::getP ( size_t  M ) const

inline

Get probability to observe a hit with given multiplicity.

Note that if M = 0, the probability corresponds to observing no hits.

Parameters

M	multiplicity (M >= 0)

Returns

probability

Definition at line 129 of file JK40.hh.

    {
      double expval = 0.0;
      
      if (M < 2)
        expval = getY0();
      else
        expval = getY1(M);

      return JFIT::getP(expval, M != 0);
    }

Member Data Documentation

double JFIT::JK40::__y0

protected

expectation value of number of single hits

Definition at line 142 of file JK40.hh.

JL1_t JFIT::JK40::__y1

protected

expectation values of number of multiple hits

Definition at line 143 of file JK40.hh.

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The documentation for this struct was generated from the following file:

• JK40.hh