[Table of Contents]

Plasma and Fusion Research

Volume 10, 3403075 (2015)

Regular Articles

Material Temperature Dependence of the Retention and Sputtering Yield of Single-Crystal Graphite under Hydrogen Plasma Irradiation
Seiki SAITO, Masayuki TOKITANI1) and Hiroaki NAKAMURA1)
National Institute of Technology, Kushiro College, 2-32-1 Otanoshike-Nishi, Kushiro 084-0916, Japan
1)
National Institute for Fusion Science, 322-6 Oroshi-cho, Toki, Gifu 509-5292, Japan
(Received 25 November 2014 / Accepted 31 March 2015 / Published 25 September 2015)

Abstract

Carbon is a candidate material for divertor plates in nuclear fusion devices. To investigate the erosion and hydrogen retention in carbon at the atomic scale, we performed molecular simulations of hydrogen injection into single-crystal graphite considering the thermal vibration of the target atoms, the diffusion of incident atoms in the target material, and the structural relaxation of the target material. Then, the dependence of hydrogen retention and sputtering yield on material temperature was investigated in detail.

Keywords

plasma-material interaction, graphite, hydrogen plasma, molecular simulation, binary collision approximation

DOI: 10.1585/pfr.10.3403075

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This paper may be cited as follows:

Seiki SAITO, Masayuki TOKITANI and Hiroaki NAKAMURA, Plasma Fusion Res. 10, 3403075 (2015).