A conventional tokamak's torus resembles a doughnut, but Tokamak Energy's design (the interior of the current version is pictured, plasma-filled, above) looks like a cored apple.
This torus has a set of toroidal electromagnetic coils wrapped around it, paired poloidal coils above and below it, and a solenoid running through the middle (see panel 1).
Here in Oxford, you'll find arguably the most successful fusion experiment on Earth, JET, the Joint European Torus, torus being the technical term for donut, which is how the reactor's shaped.