The TEXTOR helium self-pumping experiment: Design, plans, and supporting ion-beam data on helium retention in nickel
The TEXTOR helium self-pumping experiment: Design, plans, and supporting ion-beam data on helium retention in nickel
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TEXTOR 氦自泵实验：设计、计划和支持镍中氦保留的离子束数据
DOI：
10.1016/0022-3115(90)90119-8
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发表时间：
1990
影响因子：
3.1
通讯作者：
D. Walsh
中科院分区：
文献类型：
--
作者：
J. Brooks;R. Nygren;K. Dippel;B. Doyle;K. Finken;Y. Hirooka;A. Krauss;R. Mattas;R. Mcgrath;David L. Smith;D. Walsh
目前正在TEXTOR进行一项演示托卡马克中氦自泵的原理验证实验。该实验将使用安装在改进的ALT-I限制器头中的氦自泵模块。该模块由两个约25 × 25 cm 2的加热镍合金捕集板、镍沉积灯丝阵列和相关诊断器组成。在等离子体发射之间，将在两个捕获板上沉积约50 μ m镍的涂层。在发射过程中，氦和氢离子将通过约3 cm宽的入口槽撞击板。氦的去除能力，由于捕获在镍中，将被评估为各种等离子体conditions.In支持的托卡马克实验，捕获的氦在一个范围内的离子注量和表面温度，并在随后的暴露于氢，测量在离子束实验中使用蒸发的镍表面类似于预期的TEXTOR。此外，保留的H和他暴露后的镍表面的混合He/H等离子体已被测量。结果似乎是有利的，显示出高的氦捕获（~ 10- 50%He/Ni）和很少或没有被氢释放。TEXTOR实验计划于1991年开始。
A proof-of-principle experiment to demonstrate helium self-pumping in a tokamak is being undertaken in TEXTOR. The experiment will use a helium self-pumping module installed in a modified ALT-I limiter head. The module consists of two, ~ 25 × 25 cm2heated nickel alloy trapping plates, a nickel deposition filament array, and associated diagnostics. Between plasma shots a coating of ~ 50Ånickel will be deposited on the two trapping plates. During a shot helium and hydrogen ions will impinge on the plates through a ~ 3 cm wide entrance slot. The helium removal capability, due to trapping in the nickel, will be assessed for a variety of plasma conditions.In support of the tokamak experiment, the trapping of helium over a range of ion fluences and surface temperatures, and detrapping during subsequent exposure to hydrogen, were measured in ion beam experiments using evaporated nickel surfaces similar to that expected in TEXTOR. Also, the retention of H and He after exposure of a nickel surface to mixed He/H plasmas has been measured. The results appear favorable, showing high helium trapping (~ 10–50% He/Ni) and little or no detrapping by hydrogen. The TEXTOR experiment is planned to begin in 1991.