Metallic droplets removal induced by pulsed laser: For tokamak application

Abstract

During tokamak operation, plasma-wall interactions lead to material erosion process and dusts production. For safety reasons the dusts have to be kept in reasonable quantity. The dusts mobilization is a first step to collect them, and the laser is a promising technique for this application. This paper is focused on metallic and metallic oxide pollutants. To optimize the cleaning, physical mechanisms responsible for dust ejection induced by laser have been identified. These removal mechanisms can be very different as a function of the shape and the nature of the particles. © Owned by the authors, published by EDP Sciences, 2011.