The toroidal field coils will operate together, in effect, as a single magnet: the most powerful magnet ever made. They will generate a total magnetic energy of 41 gigajoules.

As noted in the paper by [P. Helander] et al., the use of permanent magnets can substantially simplify the magnetic-field coils of a stellarator, which are then primarily used for the toroidal ...

Magnetic fields in the halo of the Milky Way have a toroidal structure, extending in the radius range of 6000 light-year to 50,000 light-year from the Galaxy center.