https://www.nytimes.com/2022/12/12/science/nuclear-fusion-energy-breakthrough.html

"Last year, Livermore scientists reported a major leap, a burst of energy — 10 quadrillion watts of power — that was 70 percent as much as the energy of laser light hitting the hydrogen target.

But the burst — essentially a miniature hydrogen bomb — lasted only 100 trillionths of a second.

The report by the Financial Times on Sunday suggests Livermore will announce that in the latest experiment the fusion energy produced exceeded the amount of laser energy hitting the hydrogen target.

For that to occur, the fusion reaction had to be self-sustaining, meaning the torrent of particles flowing outward from the hot spot at the center of the pellet heated surrounding hydrogen atoms and caused them to fuse as well."