H-mode (High-confinement mode)

H-mode, or High-confinement mode, is a state in fusion reactors where plasma—the superhot, ionized gas—is confined more effectively, leading to higher energy retention. This improved confinement results in increased plasma temperature and pressure, making fusion reactions more efficient. Achieving H-mode typically involves applying a specific magnetic field pattern, which creates a boundary called a transport barrier near the plasma edge. This barrier reduces energy and particle losses, enhancing overall stability and performance of the reactor. H-mode operation is crucial for advancing fusion energy as a practical and sustainable power source.