AI Insight
Physicists at General Atomics have successfully demonstrated helicon current drive in a tokamak fusion reactor for the first time. The team showed that radio waves can be directed to travel around the donut-shaped reactor and be absorbed by the confined plasma, generating an electric current within it. This achievement represents a clear experimental validation of a theoretical mechanism that has been proposed for sustaining plasma currents in fusion devices.
Why it matters
This breakthrough could enable fusion reactors to operate continuously rather than in pulses, addressing one of the major engineering challenges in developing commercially viable fusion power plants. The ability to sustain plasma current using radio waves could eliminate the need for intermittent operation cycles that currently limit reactor efficiency and longevity.
Understand the Science
For the first time, a team of physicists in the U.S. has clearly demonstrated a “helicon current drive” in a nuclear fusion experiment. Led by Jeff Lestz at General Atomics, San Diego, the team took advantage of the latest advances in tokamak technology to show that radio waves steered to travel around the donut-shaped device can be absorbed by its confined plasma, driving an electric current inside it.
Source: Radio waves drive a fusion plasma current that could help reactors run continuously