Scientists may have found a shortcut to fusion energy
Princeton Plasma Physics Laboratory may have found a dramatically more efficient route to fusion energy by reversing the traditional approach: heating plasma first, then increasing its density. Their calculations could help future reactors reach self-sustaining fusion with far less energy while avoiding hidden problems that make ignition harder.
Scientists at the U.S. Department of Energy's Princeton Plasma Physics Laboratory (PPPL) have potentially discovered a more efficient method to achieve fusion ignition, a critical step in the pursuit of practical fusion energy. The team, led by physicists Luis Delgado-Aparicio, Masayuki Ono, and Jonathan Menard, has developed a revised version of the Lawson criterion, a mathematical rule that defines the conditions required for fusion ignition.
By incorporating additional factors that influence fusion performance, the researchers have mapped a promising route to ignition that could require substantially less energy than alternative approaches. This new method involves changing the order in which plasma is heated and compressed, starting with heating the plasma before making it denser.
This alternative sequence could significantly reduce the energy needed to reach a self-sustaining fusion reaction, potentially transforming the energy required to reach the desired conditions.
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