Effects of Helium Ions on Hydrogen Isotope Behavior in Tungsten
Effects of Helium Ions on Hydrogen Isotope Behavior in Tungsten
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DOI：
10.13182/fst09-a8881
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发表时间：
2009-07
影响因子：
0.9
通讯作者：
Y. Ueda;H. Kashiwagi;M. Fukumoto;Y. Ohtsuka;N. Yoshida
中科院分区：
文献类型：
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作者：
Y. Ueda;H. Kashiwagi;M. Fukumoto;Y. Ohtsuka;N. Yoshida
研究了氢碳混合离子束同时辐照对钨鼓泡的影响。结果表明，在1 keV氢碳混合离子束（C：0.8-1.0%）中仅加入0.1%的He离子，就能减少或完全抑制气泡的形成（在473 K和653 K和723 K）。为了获得更详细的结果，使用两个离子源，用不同能量的H和He离子辐照钨。在He能量为0.6 keV（1.5 keV H&C）时，观察到显著的起泡，而在He能量为1.0 keV和1.5 keV时，起泡形成受到抑制。这些结果表明，He气泡层减少了氢通过该层的扩散。在653 K时，He泡的尺寸约为1-2 nm，体积率约为1.2%。为了评估ITER钨壁中的T保留，应该包括这种影响。
Simultaneous irradiation effects of He on tungsten blistering with hydrogen and carbon mixed ion beam were investigated. It was found that only 0.1% addition of He ions to 1 keV H and C mixed ion beam (C:0.8-1.0%) reduced (at 473 K) or completely suppressed (at 653 K and 723 K) blister formation. In order to obtain more detailed result, two ion sources were used to irradiate tungsten with H and He ions with different energies. In the He energy of 0.6 keV (1.5 keV H&C),significant blistering was observed, while in the He energies of 1.0 keV and 1.5 keV, blister formation was suppressed. These results suggested that a He bubble layer reduced hydrogen diffusion through the layer. A He bubble size and a volume rate were about 1-2 nm and ˜2% at 653 K, respectively. To evaluate T retention in the ITER tungsten wall, this effect should be included.