An analysis of its performance showed its containment capacity did, indeed, match a tokamak's.

ECONOMIST: Fusion power

Though destructive, the flood of neutrons produced by a tokamak is (or, rather, should be) the source of its power.

ECONOMIST: How to get an energy rush without doughnuts

In a full-scale tokamak this heat would be tapped to boil water, which would then drive steam turbines to generate electricity.

ECONOMIST: How to get an energy rush without doughnuts

The reason stellarators fell out of fashion was that their magnetic fields used to leak plasma faster than those of a tokamak.

ECONOMIST: Fusion power

That technique uses a magnetic field to hold large volumes of the same isotopes of hydrogen inside a doughnut-shaped vessel, called a tokamak.

ECONOMIST: Nuclear fusion