Research Progress on Plasma-Wall Interactions in a Magnetic Confinement Tokamak

Fusion energy is a potential clean and safe energy resource,and its realization will play a key role on the energy resource requirement in China.At present,the magnetic confinement Tokamak is considered as the most promising method to realize the controlled thermonuclear fusion.However,two bottleneck problems exist for Tokamak.One is how to produce the high-parameter steady-state plasma,and the other is how to choose the key materials in Tokamak as well as the future reactor.Understanding of process and mechanism for Plasma Wall Interaction(PWI) is generally thought as a necessary way to solve the material problem.PWI is also regarded as one of the key issues for the success of International Thermonuclear Experimental Reactor(ITER),because it directly determines safety of the ITER operation,RD process of wall materials,and the life cycle of future wall in ITER.In this paper,we review the recent progress in PWI,and further elucidate its development and the key problems we have to face in the future.