
1,100 Plasma Shots Reveal Four Paths to Commercial Fusion
The UK's spherical tokamak MAST Upgrade has simultaneously suppressed ELM instabilities—which damage fusion reactor walls—using four independent methods, while recording its highest-ever plasma pressure. The results feed directly into the design of STEP, the UK's prototype fusion reactor targeted for operation in 2040, though extrapolation to ITER scale remains unverified.








