This article describe the two separate efforts at using this technique in building such a facility, and it appears to not cost more than $10 billion and years of delay (yes, I'm looking at you, ITER!).
That's where the spherical tokamaks come in. The delightfully exotic term refers to a kind of device that can contain superheated plasma in powerful magnetic fields. These devices represent our species' best shot at generating those stellar temperatures we need to achieve nuclear fusion.
Right now, the two most advanced spherical tokamaks in the world are the National Spherical Torus Experiment-Upgrade (NSTX-U) at PPPL, and the Mega Ampere Spherical Tokamak (MAST) at the Culham Centre for Fusion Energy in the U.K.
At this stage, we need as many alternatives as we can afford. I'm glad we're not putting all our eggs in ITER, because I'm getting tired of it already.
Zz.
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