Study proposes more efficient path to fusion ignition

[Marlin]

Study proposes more efficient path to fusion ignition

https://www.ans.org/news/2026-10-08/article-8475/study-proposes-more-efficient-path-to-fusion-ignition/

[Core Content]

Physicists at the Princeton Plasma Physics Laboratory have reformulated the Lawson criterion for fusion ignition to create a model incorporating energy losses, radiation, and tungsten impurities. The updated calculations indicate that heating the plasma before raising its density requires less energy and offers a more efficient approach for future reactor designs.

Researchers at Princeton Plasma Physics Laboratory reformulated the criterion to ignite and sustain fusion plasma, and their calculations indicate a pathway to make the process more energy efficient while also demonstrating the impact of effects that can make ignition more difficult, such as small amounts of tungsten in the plasma.

The picture changes: The Lawson criterion, first developed in the 1950s, is an equation evaluating whether a fusion system will produce net energy. Now, PPPL physicists Luis Delgado-Aparicio, Masayuki Ono, and Jonathan Menard have published a Physical Review Letters paper reformulating the criterion and including additional conditions for a more complete theoretical view of plasma behavior.

Read the full article at ans.org:
https://www.ans.org/news/2026-10-08/article-8475/study-proposes-more-efficient-path-to-fusion-ignition/