Researchers have utilized Alfvén waves to mitigate runaway electrons in tokamak fusion devices, offering significant implications for future fusion energy projects, including the ITER in France. Scientists led by Chang Liu of the Princeton Plasma Physics Laboratory (PPPL) have unveiled a promisin
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“These discoveries provide a comprehensive explanation for the direct observation of Alfvén waves in disruption experiments,” said Liu, a staff researcher at PPPL and lead author of a paper that details the results inResearchers derived a theory for the remarkable circularity of these interactions. The results aligned well with runaways in experiments on the DIII-D National Fusion Facility, a DOE tokamak that General Atomics operates for the Office of Science.
Fusion reactions combine light elements in the form of plasma — the hot, charged state of matter composed of free electrons and atomic nuclei called ions — to release the vast energy that powers the sun and stars. Mitigating the risk of disruptions and runaway electrons would thus provide a singular benefit for tokamak facilities designed to reproduce the process.
Nuclear fusion energy could be a pivotal sustainable energy source to complement renewables. The world’s largest fusion experiment, ITER, is being built in France. Credit: ITER Organization
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