H-mode

H-mode, or "High confinement mode," is a state achieved in nuclear fusion experiments using devices like tokamaks. In this mode, the plasma—the hot, ionized gas used for fusion—develops a barrier near its edge that reduces turbulence and energy loss. This leads to improved confinement of heat and particles, allowing the plasma to reach higher temperatures more efficiently. Achieving H-mode is important because it enhances the likelihood of sustaining fusion reactions, bringing us closer to practical and clean energy generation through nuclear fusion.