The magnet is strong enough to lift an aircraft carrier six feet into the air and weighs around 1,000 tons.
The base of what will be the world's biggest reactor has been put in position.
Algorithms are increasingly being deployed to predict disruptions that could potentially occur during fusion experiments and may help turn the long-discussed energy source into reality, experts say.
It is hoped the nuclear fusion device will help scientists overcome a key problem in harnessing plasma inside tokamaks.
The team at Los Alamos National Laboratory will fire "supersonic jets of ionized gas" at a chamber to compress fusion fuel.
That's six times as hot as the center of the sun and a major breakthrough for nuclear fusion.
Being able to control plasma that is hotter than the Sun is notoriously difficult.
"Finding a star can at times be harder than finding a planet."
Scientists may have solved one major problem that comes up when building a fusion reactor—runaway electrons.