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首页> 外文期刊>Japanese journal of applied physics >Anisotropic Graphite Erosion in Low-Temperature and High-Density Deuterium Plasma
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Anisotropic Graphite Erosion in Low-Temperature and High-Density Deuterium Plasma

机译：低温高密度氘等离子体中的各向异性石墨腐蚀

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摘要

The interaction between a hydrogen plasma and carbon materials is one of the important issues in low-temperature plasmas for both nuclear fusion science and plasma processing. To investigate the anisotropic characteristics of graphite erosion by deuterium bombardment, highly oriented pyrolytic graphite (HOPG) was exposed to deuterium plasmas in a newly developed toroidal plasma device. Two different plasmas with electron temperatures were used for irradiation: an ionizing plasma with an electron temperature of ～3eV and a recombining plasma with an extremely low electron temperature of ～0.1 Ev. Irradiations reveal clear differences between the ionizing and recombining plasmas. By surface analysis using scanning electron microscopy and Raman spectroscopy, it was found that the HOPG irradiated with the ionizing plasma has more severe damage than that irradiated with the recombining plasma. The anisotropic characteristics of graphite erosion are discussed on the basis of the results of the comparison with molecular dynamics simulation.
机译：氢等离子体与碳材料之间的相互作用是用于核聚变科学和等离子体处理的低温等离子体中的重要问题之一。为了研究氘轰击引起的石墨腐蚀的各向异性特征，在新开发的环形等离子体装置中，将高度取向的热解石墨（HOPG）暴露于氘等离子体中。两种不同的电子温度等离子体用于辐照：电子温度为〜3eV的电离等离子体和电子温度为〜0.1 Ev的极低复合离子。辐射揭示了电离和重组等离子体之间的明显差异。通过使用扫描电子显微镜和拉曼光谱的表面分析，发现用电离等离子体辐照的HOPG具有比用重组等离子体辐照的HOPG更严重的损伤。在与分子动力学模拟比较结果的基础上，讨论了石墨腐蚀的各向异性特征。

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  • 来源
    《Japanese journal of applied physics》 |2012年第1issue2期|p.01AB03.1-01AB03.5|共5页
  • 作者

    Masahiro Teraoka; Noriyasu Ohno; Shin Kajita; Toshihiro Nishiwaki; Atsushi M. Ito; Hiroaki Nakamura;

  • 作者单位

    Department of Engineering and Science, Nagoya University, Nagoya 464-8603, Japan;

    Department of Engineering and Science, Nagoya University, Nagoya 464-8603, Japan;

    EcoTopia Science Institute, Nagoya University, Nagoya 464-8603, Japan;

    Department of Engineering and Science, Nagoya University, Nagoya 464-8603, Japan;

    National Institute for Fusion Science, Toki, Gifu 509-5292, Japan;

    National Institute for Fusion Science, Toki, Gifu 509-5292, Japan;

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