Researchers identify a potentially lower-energy route to fusion ignition

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  Researchers at the U.S. Department of Energy’s Princeton Plasma Physics Laboratory have identified a potentially lower-energy route to fusion ignition.

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  Their calculations suggest heating plasma before making it denser could reduce the energy needed to reach ignition.

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  The work expands the Lawson criterion by incorporating four additional factors that influence fusion performance.

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  The researchers identified the Cordey saddle, a relatively accessible point on the boundary between plasma that needs outside heating and plasma that can sustain its own fusion reactions.

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  The findings were published in Physical Review Letters.

Who

PPPL physicists Luis Delgado-Aparicio, Masayuki Ono and Jonathan Menard.

What

They developed a more comprehensive version of the Lawson criterion and identified a potentially more energy-efficient route to fusion ignition.

When

The findings were published on October 10, 2026.

Where

Princeton Plasma Physics Laboratory, United States.

Why

To identify a more efficient way to reach the conditions for a self-sustaining fusion reaction.

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