Heed::PairProd Class Reference

#include <PairProd.h>

Public Member Functions
	PairProd ()=default
	PairProd (const std::string &file_name, double fw, double ffano=0.19)
double	get_eloss () const
	Calculate energy loss (in eV).
double	get_eloss (const double ecur) const
	Calculate energy loss (in eV) assuming V = wa / 2.
void	print (std::ostream &file, int l) const

Detailed Description

Production of electron-ion pairs by delta-electrons. All energies are assumed in eV. But it seems that it is not strict requirement. If to change this in file "file_name" and in interface, the energies could be in any units.

2003, I. Smirnov

Definition at line 16 of file PairProd.h.

Constructor & Destructor Documentation

PairProd() [1/2]

Heed::PairProd::PairProd ( )

default

PairProd() [2/2]

Heed::PairProd::PairProd	(	const std::string &	file_name,
		double	fw,
		double	ffano = 0.19
	)

Definition at line 16 of file PairProd.cpp.

    : m_w(fw), m_f(ffano) {
  mfunnamep("PairProd::PairProd(const std::string&, double, double)");
 
  std::ifstream file(file_name.c_str());
  if (!file) {
    funnw.ehdr(mcerr);
    mcerr << "cannot open file " << file_name << std::endl;
    spexit(mcerr);
  }
  long q;
  file >> m_wtable >> m_i >> m_j >> m_ftable >> q;
  if (!file.good()) {
    funnw.ehdr(mcerr);
    mcerr << "error at reading file" << std::endl;
    spexit(mcerr);
  }
  std::vector<double> xx(q);
  std::vector<double> yy(q);
  for (long n = 0; n < q; n++) file >> xx[n] >> yy[n];
  pran = PointsRan(xx, yy, m_i, m_j);
  m_k = sqrt(m_f * m_w * m_w / (m_ftable * m_wtable * m_wtable));
  m_s = m_w - m_k * m_wtable;
  // m_s = m_w - m_w / m_f * (2. * m_f - m_ftable);
  // m_k = m_w / (m_f * m_wtable) * (2. * m_f - m_ftable);
}

Member Function Documentation

get_eloss() [1/2]

double Heed::PairProd::get_eloss

(

)

const

Calculate energy loss (in eV).

Definition at line 43 of file PairProd.cpp.

                                 {
  mfunname("double PairProd::get_eloss() const");
  return m_k * pran.ran(SRANLUX()) + m_s;
}

get_eloss() [2/2]

double Heed::PairProd::get_eloss

(

const double

ecur

)

const

Calculate energy loss (in eV) assuming V = wa / 2.

Definition at line 59 of file PairProd.cpp.

                                                   {
  mfunname("double PairProd::get_eloss(const double ecur) const");
  const double e_loss = m_k * pran.ran(SRANLUX()) + m_s;
  constexpr double V_ratio = 0.5;
  const double v = V_ratio * m_w / e_cur; 
  // const double c = 1. / (1. - v);
  const double c = v < 1. ? 1. / (1. - v * v) : DBL_MAX;
  return e_loss * c;
}

print()

void Heed::PairProd::print	(	std::ostream &	file,
		int	l
	)		const

Definition at line 71 of file PairProd.cpp.

                                                  {
  if (l <= 0) return;
  Ifile << "PairProd:\n";
  indn.n += 2;
  Ifile << "W=" << m_w << " Fano factor=" << m_f << '\n';
  Ifile << "W table=" << m_wtable << " Fano factor table=" << m_ftable << '\n';
  Ifile << "I=" << m_i << " J=" << m_j << " k=" << m_k << " s=" << m_s << '\n';
  pran.print(file);
  indn.n -= 2;
}

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

• PairProd.h
• PairProd.cpp