The National Ignition Facility achieves ignition in a fusion reactor.
It was touted as a “major scientific breakthrough” and, it seems, the rumors were true: On Tuesday, scientists at Lawrence Livermore National Laboratory announced that they have, for the first time, achieved net energy gain in a controlled fusion experiment.
“We have taken the first tentative steps toward a clean energy source that could revolutionize the world,” Jill Hruby, administrator of the National Nuclear Security Administration, said in a press conference Tuesday.
The triumph comes courtesy of the National Ignition Facility at LLNL in San Francisco. This facility has long tried to master nuclear fusion — a process that powers the sun and other stars — in an effort to harness the massive amounts of energy released during the reaction because, as Hruby points out, all that energy is “clean” energy.
Despite decades of effort, however, there had been a major kink in these fusion experiments: the amount of energy used to achieve fusion has far outweighed the energy coming out. As part of the NIF mission, scientists had long hoped to achieve “ignition,” where the energy output is “greater than or equal to laser drive energy.”
Some experts have remained skeptical that such a feat was even possible with fusion reactors currently in operation. But slowly, NIF pushed forward. In August last year, LLNL revealed it had come close to this threshold by generating around 1.3 megajoules (a measure of energy) against a laser drive using 1.9 megajoules.
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