celeritas::SplineXsCalculator Class Reference

Find and interpolate cross sections on a uniform log grid with an input spline-order. More...

#include <SplineXsCalculator.hh>

Public Types
Type aliases
using	Energy = Quantity< XsGridData::EnergyUnits >
using	Values = Collection< real_type, Ownership::const_reference, MemSpace::native >

Public Member Functions
CELER_FUNCTION	SplineXsCalculator (XsGridData const &grid, Values const &values, size_type const order)
	Construct from cross section data.
CELER_FUNCTION real_type	operator() (Energy energy) const
	Calculate the cross section. More...
CELER_FUNCTION real_type	operator[] (size_type index) const
	Get the cross section at the given index.
CELER_FUNCTION Energy	energy_min () const
CELER_FUNCTION Energy	energy_max () const

Detailed Description

Find and interpolate cross sections on a uniform log grid with an input spline-order.

Todo:

Currently this is hard-coded to use "cross section grid data" which have energy coordinates uniform in log space. This should be expanded to handle multiple parameterizations of the energy grid (e.g., arbitrary spacing needed for the Livermore sampling) and of the value interpolation (e.g. log interpolation). It might also make sense to get rid of the "prime energy" and just use log-log interpolation instead, or do a piecewise change in the interpolation instead of storing the cross section scaled by the energy.

SplineXsCalculator calc_xs(xs_grid, xs_params.reals, order);
real_type xs = calc_xs(particle);

Member Function Documentation

operator()()

CELER_FUNCTION real_type celeritas::SplineXsCalculator::operator() ( Energy  energy ) const

inline

Calculate the cross section.

If needed, we can add a "log(energy/MeV)" accessor if we constantly reuse that value and don't want to repeat the std::log operation.

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

• SplineXsCalculator.hh