This is the moment the UK’s JET fusion reactor sustained a plasma reaction for 5.2 seconds
Now, during the last days of its four-decade-long life, JET has set a new record for the most energy created in a single fusion reaction. JET's new record is the latest milestone in an exciting few years for fusion. With each milestone, fusion scientists inch closer — slowly, very slowly, but steadily — toward constructing a commercial fusion power plant that can plug into the grid.
Using 0.2 milligrams of fuel (about a hundred thousandth of an ounce) JET sustained high fusion power for 5 seconds and created 69 megajoules of energy. That's about enough to power an average home for maybe a few minutes. Neither of these parameters seems Earth-shattering, but they are indeed numbers for fusion scientists to celebrate.