It's another step closer to a dream of fusion providing the world with clean, abundant energy.
the process that powers stars—nuclear fusion—and created more energy than they put in. Now, physicists and engineers at the same facility, the National Ignition Facility at Northern California’s Lawrence Livermore National Laboratory, appear to have successfully created an energy-gaining fusion experiment for the second time.
There are multiple ways of achieving fusion, and NIF works with one, called inertial confinement fusion . In NIF’s setup, a high-powered laser beam splits into 192 smaller beams, showering a capsule that scientists call a hohlraum. Inside the hohlraum’s walls, this barrage spawns X-rays that crash into the capsule’s filling: a pellet of deuterium and tritium, super-squeezing it at temperatures and pressures more intense than the sun’s, initiating fusion.
“We also repeat things, not just to see if they repeat, but also to see the sensitivities,” Whyte says. “Seeing the variability and the differences of those from experiment to experiment is really exciting.”
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