ÌÒÖ­Ó°Ôº

​One of the biggest challenges facing fusion physicists is controlling the plasma inside a tokamak reactor.

Plasma — a gas of the fuels that are heated to start the fusion process — is difficult to keep stable, and seeks to escape the magnetic field that confines it within the machine. This results in 'instabilities' which make the plasma wobble and fluctuate, taking energy away from it and affecting the tokamak's performance.