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Erosion of tungsten surfaces in He and Ar/He plasma

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Abstract

Irradiation tests of tungsten surface were performed with He and He/Ar plasma generated by microwave electron cyclotron resonance. Thickness loss was used as the erosion rate of tungsten surface under the plasma irradiation. The results revealed that the thickness loss increased linearly with negative bias. SEM images proved that the addition of Ar apparently increased the plasma erosion. The thickness loss increased sharply with the Ar fraction of Ar/He mixture when it was <20 %, where the increasing slope of thickness loss lowered down gradually.

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Acknowledgments

This work was supported by the National Magnetic Confinement Fusion Program (Grant No. 2013GB109003).

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Beijing University of Technology, Beijing, 100124, China

    Chao Li, Bo Wang & Zi-Long Zhang

  2. The Third Laboratory, Research and Test Center, Hangtiankegong Corporation, Beijing, 100854, China

    Li-Xia Zhang

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  1. Chao Li
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  2. Bo Wang
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Correspondence to Bo Wang.

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Li, C., Wang, B., Zhang, ZL. et al. Erosion of tungsten surfaces in He and Ar/He plasma. NUCL SCI TECH 27, 37 (2016). https://doi.org/10.1007/s41365-016-0049-y

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  • DOI: https://doi.org/10.1007/s41365-016-0049-y

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