First measurements of aluminum erosion by neutral particles on EAST tokamak
First measurements of aluminum erosion by neutral particles on EAST tokamak
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DOI：
10.1016/j.nme.2021.100938
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发表时间：
2021-02
影响因子：
2.6
通讯作者：
Lin Mu;R. Ding;N. Liu;Hai Xie;B. Gao;Junxiu Chen
中科院分区：
文献类型：
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作者：
Lin Mu;R. Ding;N. Liu;Hai Xie;B. Gao;Junxiu Chen
为了评估托卡马克运行期间中性粒子对第一壁材料的侵蚀效果，在2018年和2019年的EAST战役中，铝(Al)涂层样品暴露在一系列等离子体放电中。为了避免带电粒子入射，样品被安装在一个钼(Mo)圆柱套中，并放置在远离主等离子体的位置。用卢瑟福背散射光谱仪(RBS)测量了等离子体曝光前后铝层的侵蚀厚度。两次活动中样品的平均净侵蚀速率分别约为1.18亿×1013个原子cm−2s−1和4.64x×1013个原子cm−2s−1。不同的等离子体密度和加热功率可能会导致不同的烧蚀速率。在不同密度条件下，用中性分布理论计算的冲蚀率与实验结果吻合较好。
To evaluate the erosion effects of neutral particles on the first wall materials during tokamak operation, aluminum (Al) coated samples were exposed to a sequence of plasma discharges in 2018 and 2019 EAST campaigns. In order to avoid the incidence of charged particles, the samples were installed in a molybdenum (Mo) cylindrical sleeve and positioned far from the main plasma. The erosion thicknesses of Al layer were measured by Rutherford Backscattering Spectrometry (RBS) before and after the plasma exposure. The average net erosion rates of the samples in the two campaigns are around 1.18 × 1013atoms cm−2s−1and 4.64 × 1013atoms cm−2s−1, respectively. The different erosion rate may mainly result from different plasma density and heating power. The theoretical calculated erosion rates using the neutral distribution under different density conditions are in fair agreement with the experimental results.