  The ability to separate large volumes of mixed species based on atomic mass
appears desirable for a variety of emerging applications with high societal
impact. One possibility to meet this objective consists in leveraging mass
differential effects in rotating plasmas. Beyond conventional centrifugation,
rotating plasmas offer in principle additional ways to separate elements based
on mass. Single ion orbits show that ion radial mass separation in a uniform
magnetized plasma column can be achieved by applying a tailored electric
potential profile across the column, or by driving a rotating magnetic field
within the column. Furthermore, magnetic pressure and centrifugal effects can
be combined in a non-uniform geometry to separate ions based on mass along the
field lines. Practical application of these separation schemes hinges on the
ability to produce the desirable electric and magnetic field configuration
within the plasma column.
