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Anonymous
>>273105 It's the Tokamak, which is a device for holding plasma in a torus (doughnut shape). It's what's being used to try and harness nuclear fusion as a useful source of energy.
Basically the fusion happens in a plasma, but so much energy is released that the plasma gets more and more energetic and forces its way to the outside of the Tokamac. If we can stop it doing this then it's clean cheap energy from here on in. :-)
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