So far ,all the fusion experiments took more energy input than output, not anymore
The MIT team tweaked the “recipe” for nuclear fusion in such a way that the output of power was ten times greater than with the original composition, which consists of 95 percent deuterium ions and 5 percent hydrogen ions, forming plasma heated to incredibly high temperatures in the tokamak from the movement of the ions.
The tokamak produces magnetic fields that keep the superhot plasma inside and keep it moving - and hot - but controlling it for ever-longer periods of time and making it move faster to produce more energy has been a challenge. Now, the MIT scientists may have found the secret ingredient in an isotope of helium, helium-3.