聚变等离子体条件下钨材料表面微纳尺度损伤研究

在等离子体作用下壁材料会产生损伤失效行为，减少壁材料的使用寿命，影响中心等离子体的运行，因此等离子体与壁材料的相互作用是托卡马克聚变装置运行过程中一个必须解决的关键问题之一，尤其在以长脉冲高参数运行的新一代聚变装置中更是如此。本申请针对等离子体作用下壁材料的损伤问题，采用低能、高束流氘等离子体辐照，研究在不同能量、束流和剂量条件下钨材料微纳尺度的损伤行为，认识钨材料微纳尺度的损伤规律，揭示钨材料表面（亚微米、微米）气泡、纳米泡和纳米组织形成机理，阐明表面气泡、纳米泡和纳米组织之间的关联，为壁材料研发和托卡马克装置运行提供理论指导。

The tokamak wall materials will suffer damages when exposed to plasma, which will reduce the lifetime of wall materials and has negative effects on the operation of plasma, so the plasma wall interactions will be one of the important problems that must be solved during the operation of fusion devices, especially for the new generation devices operating with long pulse and high parameter plasma. This application is aimed to solve the damages problem of wall materials exposed to plasma. We will irradiate the tungsten materials with low temperature high flux Deuterium plasma, and research on the micro- and nano- scale damage behavior of tungsten materials under different ion energy, flux and fluence conditions. The research objectives are to understand the micro- and nano- scale damage law of tungsten,reveal the formation mechanisms of blisters(submicro- and micro scale), nano bubbles, and nano structure, and clarify the relationship between blisters, nano bubbles and nano structure. The result of this research can provide theoretical guidance for the research and design of materials and the operation of tokamak devices.