Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2016, Vol. 27 ›› Issue (2): 37 doi: 10.1007/s41365-016-0049-y

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Erosion of tungsten surfaces in He and Ar/He plasma

Chao Li 1, Bo Wang 1, Zi-Long Zhang 1, Li-Xia Zhang 2   

  1. 1 Department of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China
    2 The Third Laboratory, Research and Test Center, Hangtiankegong Corporation, Beijing 100854, China
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Chao Li, Bo Wang, Zi-Long Zhang, Li-Xia Zhang. Erosion of tungsten surfaces in He and Ar/He plasma.Nuclear Science and Techniques, 2016, 27(2): 37     doi: 10.1007/s41365-016-0049-y

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.

Key words: Plasma-facing material (PFM), Erosion, ECR, Plasma irradiation, Tungsten