This is a computer drawing of the prototype, which attaches current-carrying handles to either end of the central plasma. Credit: T. Jarboe, Univ. of Washington

Mug handles could help hot plasma give lower-cost, controllable fusion energy

October 11, 2012 by Hannah Hickey

(—New hardware lets engineers maintain the plasma used in fusion reactors in an energy-efficient, stable manner, making the system potentially attractive for use in fusion power plants.

Researchers around the world are working on an efficient, reliable way to contain the plasma used in fusion reactors, potentially bringing down the cost of this promising but technically elusive energy source. A new finding from the University of Washington could help contain and stabilize the plasma using as little as 1 percent of the energy required by current methods.

“All of a sudden the current energy goes from being almost too much to almost negligible,” said lead author Thomas Jarboe, a UW professor of aeronautics and astronautics. He presents the findings this week at the International Atomic Energy Association’s 24th annual Fusion Energy Conference in San Diego.

The new equipment looks like handles on a coffee mug – except they attach to a vessel containing a million-degree plasma that is literally too hot to handle. Most people know about nuclear fission, the commercial type of nuclear power generated from splitting large atoms in two. Still under research is nuclear fusion, which smashes two small atoms together, releasing energy without requiring rare elements or generating radioactive waste.

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