  Numerical simulations of hysteretic ac losses in a tubular
superconductor/paramagnet heterostructure subject to an oscillating transverse
magnetic field are performed within the quasistatic approach, calling upon the
COMSOL finite-element software package and exploiting
magnetostatic-electrostatic analogues. It is shown that one-sided magnetic
shielding of a thin, type-II superconducting tube by a coaxial paramagnetic
support results in a slight increase of hysteretic ac losses as compared to
those for a vacuum environment, when the support is placed inside; a
spectacular shielding effect with a possible reduction of hysteretic ac losses
by orders of magnitude, however, ensues, depending on the magnetic permeability
and the amplitude of the applied magnetic field, when the support is placed
outside.
