phot::ScintTimeLAr Class Reference

#include <ScintTimeLAr.h>

Inheritance diagram for phot::ScintTimeLAr:

Public Member Functions
	ScintTimeLAr (fhicl::ParameterSet const &pset)
void	GenScintTime (bool is_fast, CLHEP::HepRandomEngine &engine)
Public Member Functions inherited from phot::ScintTime
virtual	~ScintTime ()=default
double	GetScintTime () const

Private Member Functions
double	single_exp (double t, double tau2) const
double	bi_exp (double t, double tau1, double tau2) const

Private Attributes
int	LogLevel
double	SRTime
double	SDTime
double	FRTime
double	FDTime

Additional Inherited Members
Protected Attributes inherited from phot::ScintTime
double	timing { 0.0 }

Detailed Description

Definition at line 20 of file ScintTimeLAr.h.

Constructor & Destructor Documentation

phot::ScintTimeLAr::ScintTimeLAr ( fhicl::ParameterSet const &  pset )

explicit

Definition at line 19 of file ScintTimeLAr.cc.

    : LogLevel{pset.get<int>("LogLevel")}
    , SRTime{pset.get<double>("SlowRisingTime", 0.0)}
    , SDTime{pset.get<double>("SlowDecayTime",  0.0)}
    , FRTime{pset.get<double>("FastRisingTime", 0.0)}
    , FDTime{pset.get<double>("FastDecayTime",  0.0)}
  {
    if ( LogLevel >= 1 ) {
      std::cout << "ScintTimeLAr Tool configure:" << std::endl;
      std::cout << "Fast rising time: "   << FRTime
                << ", Fast decay time: "  << FDTime
                << ", Slow rising time: " << SRTime
                << ", Slow decay time: "  << SDTime
                << std::endl;
    }
  }

Member Function Documentation

double phot::ScintTimeLAr::bi_exp ( double  t, double  tau1, double  tau2  ) const

private

Definition at line 43 of file ScintTimeLAr.cc.

  {
    return (((std::exp((-1.0 * t) / tau2) * (1.0 - std::exp((-1.0 * t) / tau1))) / tau2) / tau2) * (tau1 + tau2);
  }

void phot::ScintTimeLAr::GenScintTime ( bool  is_fast, CLHEP::HepRandomEngine &  engine  )

virtual

Implements phot::ScintTime.

Definition at line 54 of file ScintTimeLAr.cc.

  {
    double tau1;
    double tau2;

    if(is_fast) {
      tau1 = FRTime;
      tau2 = FDTime;
    }
    else {
      tau1 = SRTime;
      tau2 = SDTime;
    }

    CLHEP::RandFlat randflatscinttime{engine};

    if ((tau1 < 1e-8) || (tau1 == -1.0)) {
      timing = -tau2 * std::log(randflatscinttime());
      return;
    }

    //ran1, ran2 = random numbers for the algorithm
    while (1) {
      auto ran1 = randflatscinttime();
      auto ran2 = randflatscinttime();
      auto d = (tau1 + tau2) / tau2;
      auto t = -tau2 * std::log(1 - ran1);
      auto g = d * single_exp(t, tau2);
      if (ran2 <= bi_exp(t, tau1, tau2) / g) {
        timing = t;
        return;
      }
    }
  }

double phot::ScintTimeLAr::single_exp ( double  t, double  tau2  ) const

private

Definition at line 37 of file ScintTimeLAr.cc.

  {
    return std::exp((-1.0 * t) / tau2) / tau2;
  }

Member Data Documentation

double phot::ScintTimeLAr::FDTime

private

Definition at line 33 of file ScintTimeLAr.h.

double phot::ScintTimeLAr::FRTime

private

Definition at line 32 of file ScintTimeLAr.h.

int phot::ScintTimeLAr::LogLevel

private

Definition at line 27 of file ScintTimeLAr.h.

double phot::ScintTimeLAr::SDTime

private

Definition at line 31 of file ScintTimeLAr.h.

double phot::ScintTimeLAr::SRTime

private

Definition at line 30 of file ScintTimeLAr.h.

---

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

• ScintTimeLAr.h
• ScintTimeLAr.cc