Plasma surface interaction

In plasma physics and controlled nuclear fusion, plasma-surface interactions concern the physical, chemical, and mechanical processes at the interface between plasma and solid surfaces. A critical area of ongoing research in magnetic confinement fusion devices, such as tokamaks and stellarators, is understanding the physics of the plasma boundary and its interactions with plasma-facing components (PFCs), typically in the form of divertors or limiters.

Source: Wikipedia — Plasma surface interaction (CC BY-SA 4.0)