The varying reactor types reflect different strategies for overcoming fusion's intimidating technical barriers. At ITER, the field confining the burning plasma will be 280,000 times as strong as the one around Earth. (Image credit: Science History Images/Alamy Stock Photo) How fusion reactors workĮxisting fusion reactors can be split into two broad categories: inertial confinement reactors like the NIF's, which contain the hot plasma with lasers or particle beams, and magnetic confinement reactors, such as the U.K.-based Joint European Torus (JET), Europe's upcoming International Thermonuclear Experimental Reactor (ITER), and China's Experimental Advanced Superconducting Tokamak (EAST), which sculpt the plasma into various torus shapes with strong magnetic fields. The National Ignition Facility's fusion reactor uses 192 laser beams to focus laser light into a hot-spot the diameter of a human hair.
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