Secretary of Energy Jennifer Granholm, center, joined from left by Arati Prabhakar, the president's science adviser, and National Nuclear Security Administration Deputy Administrator for Defense Programs Marvin Adams, discusses a major scientific breakthrough in fusion research that was made at the lab in California, during a news conference at the Department of Energy in Washington, Tuesday, Dec. 13, 2022.
Nuclear fusion is the reaction in which two light atomic nuclei combine to form a single heavier one and release massive amounts of energy — the same energy that is used in thermonuclear weapons. Harnessing it for civilian energy has been a goal of researchers in several countries for half a century or more.
“This milestone moves us one significant step closer to the possibility of zero-carbon abundant energy powering our society,” Granholm said. “We got out 3.15 megajoules, we input 2.05 megajoules in the laser,” said Mark Herrmann, who is the Lawrence Livermore National Laboratory’s program director for weapon physics and design, in an expert panel discussion that followed the announcement. “That’s never been done before in any fusion laboratory anywhere in the world.”“I want to be clear, ultimately this experiment drew about 300 megajoules from the grid,” Herrmann said. “The laser wasn’t designed to be efficient.
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