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Hot doughnut

发布时间:2019-03-07 01:20:15来源:未知点击:

The plasma in a tokamak fusion reactor is so hot, only pulsed transformers have so far been able to generate magnetic fields strong enough to contain it. Now Swiss physicists have shown that beaming powerful microwaves into a doughnut-shaped tokamak can create a strong, steady magnetic field—a significant step towards a practical reactor (Physical Review Letters, vol 84, p 3322). A team at the Swiss Federal Institute of Technology in Lausanne ran their microwave source for two seconds,