Princeton Plasma Physics Laboratory

By John Greenwald, PPPL

Magnetic forces ripple throughout the universe, from the fields surrounding planets to the gasses filling galaxies, and can be launched by a phenomenon called the Biermann battery …
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The same fusion reactions that power the sun also occur inside a tokamak, a device that uses magnetic fields to confine and control plasmas of 100-plus million degrees. Under extreme …
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Fusion, the energy that powers the stars, might one day provide abundant energy here on Earth.

In a nuclear fusion reactor, the hot, charged gas known as plasma reaches out …
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