 The magnetic flux surfaces are toroidal, with the current being totally toroidal at the core of the torus and totally poloidal at the surface of the torus.This is similar to the field configuration of a tokamak, except that the field-producing coils are simpler and do not penetrate the plasma torus.Note that, unlike most plasma structures, the Lorentz force and the Magnus force, 
formula_3, 
play equivalent roles.