EAST's Density Breakthrough: Fusion's New Frontier Unlocked

China's EAST tokamak has experimentally verified a density-free plasma regime, sustaining densities 1.3–1.65 times the Greenwald limit without instability. This shatters a core tokamak constraint, accelerating paths to ignition and commercial fusion. Amid rising global investments, it reshapes clean energy geopolitics and decarbonization timelines.