Retention properties of plasma particles in tungsten exposed to LHD divertor plasmas
Retention properties of plasma particles in tungsten exposed to LHD divertor plasmas
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DOI：
10.1016/j.jnucmat.2007.01.040
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发表时间：
2007-06
影响因子：
3.1
通讯作者：
M. Tokitani;M. Miyamoto;K. Tokunaga;T. Fujiwara;N. Yoshida;S. Masuzaki;N. Ashikawa;T. Morisaki;M. Shoji;A. Komori;S. Nagata;B. Tsuchiya
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文献类型：
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作者：
M. Tokitani;M. Miyamoto;K. Tokunaga;T. Fujiwara;N. Yoshida;S. Masuzaki;N. Ashikawa;T. Morisaki;M. Shoji;A. Komori;S. Nagata;B. Tsuchiya
为了研究偏滤器等离子体对钨中等离子体粒子的滞留特性，在LHD中将钨样品暴露在长脉冲氦或氢偏滤器等离子体中进行了材料探测实验。曝光后，用离子束分析技术对注入的氦原子和氢原子进行了定量分析。虽然入射能量很低，但证实了等离子体粒子的显著保留。在氦偏滤器实验的情况下，位于打击点(保留率最高)的样品，氦原子的总留存量估计为1.2×1020He/m2，氦原子的深度分布约为25 nm。这比TRIM-CODE对200 eV-He+辐照的计算结果要深得多。在氢的情况下，在敲击点处氢的总保留量估计为3×1019H/m2(最低保留量)。
To study retention properties of plasma particles in tungsten exposed to divertor plasmas, material probe experiments were carried out by exposing tungsten specimens to long pulse helium or hydrogen divertor plasma in LHD. After the exposure, the quantitative analysis of the implanted helium and hydrogen atoms were conducted by using ion beam analytical techniques. Though the incidence energies were very low, remarkable retention of plasma particles were confirmed. In the case of helium divertor experiment, the specimen which located at the strike point (highest retention), the total retained helium atoms were estimated to be 1.2×1020He/m2, and depth profile of helium atoms reached to about 25nm. It is the much deeper range than that of the calculated results of 200eV-He+irradiation by TRIM-code. In the case of hydrogen, the total retention of hydrogen at the strike point was estimated to be 3×1019H/m2(lowest retention).