cientists have taken the next big stride in nuclear fusion technology with the switch-on of the Japanese Torus-60 Super Advanced (JT-60SA), the current record holder for the world’s largest tokamak. Situated at Japan’s National Institutes for Quantum Science and Technology (QST), the tokomak has produced plasma volumes up to 135-cubic-metres and has been created in a collaboration between the European Union’s Fusion for Energy and QST. The word ‘tokamak’ comes from the Russian acronym for ‘toroidal chambers with magnetic coils’, and like others of its kind, JT-60SA generates energy by harnessing the power of nuclear fusion reactions. To achieve this, a fuel of superheated deuterium and hydrogen is injected into the doughnut-shaped vacuum chamber at the core of the
