A large circular metal device, JT-60SA, surrounded by other metal machinery
JT-60SA is a tokamak in Japan, currently the largest fusion reactor in the world.
  • Japan's experimental nuclear fusion reactor is up and running.
  • JT-60SA is currently the most powerful experimental fusion reactor in operation.
  • It's a different device than NIF's, which had a fusion breakthrough last year.

Nuclear fusion has the potential to revolutionize the world by creating abundant, emissions-free energy.