  When a spin-splitting field is introduced to a thin film superconductor, the
spin currents polarized along the field couples to energy currents that can
only decay via inelastic scattering. We study spin and energy injection into
such a superconductor where spin-orbit impurity scattering yields inverse
spin-Hall and spin-swapping currents. We show that the combined presence of a
spin-splitting field, superconductivity, and inelastic scattering gives rise to
a strong enhancement of the ordinary inverse spin-Hall effect, as well as
unique inverse spin-Hall and spin-swapping signals orders of magnitude stronger
than the ordinary inverse spin-Hall signal. These can be completely controlled
by the orientation of the spin-splitting field, resulting in a long-range
charge and spin accumulations detectable much further from the injector than in
the normal-state. While the enhanced inverse spin-Hall signals offer a major
improvement in spin detection sensitivity, the unique spin-swap signals can be
utilized for designing devices where both the spin and current directions are
controlled and altered throughout the geometry.
