  Enhancement of minor ions such as $^3$He and heavy ions in flare-associated
solar energetic particle (SEP) events remains one of the major puzzles in
heliophysics. In this work, we use 3D hybrid simulations (kinetic protons and
fluid electrons) to investigate particle energization in a turbulent low-beta
environment similar to solar flares. It is shown that in this regime the
injected large-amplitude Alfv\'en waves develop into compressible and
anisotropic turbulence, which efficiently heats thermal ions of different
species. We find that temperature increase of heavy ions is inversely
proportional to the charge to mass ratio, which is consistent with observations
of impulsive SEP events. Further analysis reveals that ions are energized by
interacting with nearly perpendicular magnetosonic waves near proton inertial
scale.
