Measurement of deuterium and tritium retentions on the surface of JT-60 divertor tiles by means of nuclear reaction analysis
Measurement of deuterium and tritium retentions on the surface of JT-60 divertor tiles by means of nuclear reaction analysis
复制标题
通过核反应分析测量 JT-60 偏滤器瓦表面的氘和氚保留量
DOI：
10.1016/j.jnucmat.2004.04.292
复制
发表时间：
2004
影响因子：
3.1
通讯作者：
T. Nishitani
中科院分区：
文献类型：
--
作者：
K. Ochiai;T. Hayashi;C. Kutsukake;Y. Gotoh;K. Masaki;T. Arai;N. Miya;T. Nishitani
测量氘和氚在面向等离子体材料上的滞留量和深度分布对于了解等离子体-壁相互作用是很重要的。利用能量可调的氘束建立了核反应分析（NRA）。利用NRA方法，获得了DD燃烧辐照JT-60偏滤器石墨瓦表面的氘、氚深度分布。NRA方法表明，两种不同的表面保留的氘的平均浓度分别为1.3× 1016和0.3× 1016 cm −2。在JT-60 U W型偏滤器的圆顶单元瓦上测量了T（d，α）n反应产生的α粒子，测得的氚活度约为18 kBq/cm ~ 2。用NRA获得的α谱的峰值能量约为1.2MeV。这一结果意味着高能tritons注入偏滤器石墨瓦。
It is important to measure retentions and depth profiles of deuterium and tritium on plasma facing materials to understand plasma-wall interactions. The nuclear reaction analysis (NRA) has been established using a deuteron beam with an adjustable energy. By means of the NRA, depth profiles of deuterium and tritium on the surface of JT-60 divertor graphite tiles irradiated with DD burning were obtained. The NRA method showed that the average concentrations of the deuterium retained in the surface of two different were 1.3×1016and 0.3×1016cm−2. α-particles from the T(d, α)n reaction were measured from a dome unit tile of JT-60U W-shaped divertor and the measured activity of tritium was about 18 kBq/cm2. The peak energy of the α spectrum obtained with the NRA was about 1.2 MeV. This result implies that energetic tritons were implanted in the divertor graphite tile.