The machine is under constant development as Tokamak Energy races to build something commercially viable.
This latest upgrade includes coating the inside of the ST40 with lithium.
Researchsuggeststhe element can help the walls of fusion reactors better withstand extreme temperatures.

The project is slated to commence next year.
The$52mn in funding will be divided equally among all three partners.
Story bySion Geschwindt
Sion is a freelance science and technology reporter, specialising in climate and energy.
