Fusion plasmas have been hitting the same density wall for 40 years. Push the fuel concentration too high and the reactor fails within seconds, ending the shot in a cascade of instability. That empirical limit, known as the Greenwald density, has been one of fusion’s most frustrating constraints, because the denser the plasma, the more ... Read more The post China’s Fusion Reactor Breaks Density Ceiling That Has Limited Tokamaks for Decades appeared first on SciChi.