Plasma-material interaction in IR-T1 tokamak

摘要

The interaction between plasma and material is the one of the main challenge for the construction of a fusion reactor. For this purpose, it is very important to choose a properties hard material with properties as high hardness, low nuclear activation, high thermal conductivity and unique optical properties. In this paper, tungsten oxide nanostructure (WO) has been chosen as the best material with excellent physical and chemical properties. The first results of WO coating effect on the improvement of first wall material of IR-T1 Tokamk have been reported in this paper. The synthesis of WO nanostructure on the stainless steel 316L (S.S. 316L) was carry out by the Hot Filament Chemical Vapor Deposition (HFCVD) method. In order to study of the coating effect s, these samples were exposed to 200 shots of IR-T1 hydrogen plasma with 6 second duration time. Effect of plasma explosion on the structural and optical properties of these samples has been investigated using X-Ray Diffraction (XRD), Field Emission Scanning Electron Microscopy (FESEM) and UV-Vis spectrophotometer. The results show that WO nanostructure coating on S.S. 316L using the HFCVD is a useful method for improvement of optical and physical properties of first-wall material in IR-T1. Details of the experiment will be discussed in the full paper.