in simpleton's terms, a tokomak magnetically confines a circulating plasma. I assume the plasma circulates for the same reason that electric current flows in the presence of a changing magnetic field. By looking at the design of a tokomak, I would guess the donut magnets are activated sequentially. Activating one magnet just as the adjacent is reaching peak field strength would propel the particles around. A rough mechanical analogy might be a larger circular rubber tube filled with liquid. Sliding a narrow donut around the tube will propel the water around(although causes of motion are entirely different) But to get to plasma, the gas has to be heated first. But once the gas ionizes, the negative and positive particles have to go in opposite directions because the same magnetic field will push the differently charged particles in opposite directions, right? Or am I fundamentally misunderstanding how electricity is generated? I am ignoring the field generated by ion currents because the opposite current flows would cancel them out. So are there two opposing current flows in a tokomak?