Abstract
Plasma-wall interactions in fusion devices is briefly introduced. In a fusion reactor, a high temperature and high density plasma is confined in so-called closed magnetic surfaces. A relatively low temperature plasma exists outside the closed magnetic surfaces, and that interacts with surfaces of vacuum vessel wall and in-vessel components. By the interactions, erosion of materials of the surfaces, and retention and recycling of plasma particles in and from the surfaces take place, and they affect the fusion plasma. An interesting topic of plasma-wall interaction is dust properties in fusion devices. That is also introduced in this talk.
