A bit late to the party but I found this video illuminating: https://www.youtube.com/watch?v=vqmoFzbZYEM https://www.youtube.com/watch?v=vqmoFzbZYEM Basically

A bit late to the party but I found this video illuminating: https://www.youtube.com/watch?v=vqmoFzbZYEM https://www.youtube.com/watch?v=vqmoFzbZYEM Basically (if I understood correctly) it has to do with confining the plasma within the torus without the need of an electrical magnetic field (which is what the Tokamak uses).