Study of deuterium retention on lithiated tungsten exposed to high-flux deuterium plasma using laser-induced breakdown spectroscopy

Study of deuterium retention on lithiated tungsten exposed to high-flux deuterium plasma using laser-induced breakdown spectroscopy
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使用激光诱导击穿光谱研究暴露于高通量氘等离子体的锂化钨的氘保留

DOI:
10.1016/j.fusengdes.2014.04.071
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发表时间:
2014-10
影响因子:
1.7
通讯作者:
van der Meiden, H. J.
van der Meiden, H. J.
中科院分区:
工程技术3区
文献类型:
--
作者:
Zhang, Chenfei;Ding, Hongbin;De Temmerman, G.;van der Meiden, H. J.

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钨正在考虑用作热核实验堆偏滤器区域的面向等离子体的材料。在EAST这样的长脉冲托卡马克中,锂离子可以显著提高等离子体性能。锂化钨的研究对于理解锂离子对EAST的调节作用是非常重要的,因为在EAST中,钨将被用作面向等离子体的材料。本文研究了锂化钨与高通量氚等离子体相互作用过程中的几个重要问题,如锂化钨与高通量氚等离子体的相互作用、锂化钨的元素分布、锂化钨的化学状态等。在线性等离子体模拟装置Magnum-PSI中,首次用原位激光诱导击穿光谱(LIBS)研究了纯钨和锂化钨中的氚保留。结果表明,在氚等离子体暴露后,氚在锂化层中的滞留可以达到饱和,并且锂化层中的锂与氘发生化学结合。此外,锂离子还能抑制钨表面的起泡。这些结果对于LIBS作为托卡马克面向等离子体组件的诊断技术的应用具有一定的参考价值。
Tungsten is under consideration for use as a plasma-facing material in the divertor region of ITER. Lithiation can significantly improve plasma performance in long-pulse tokamaks like EAST. The investigation of lithiated tungsten is important for understanding the lithium conditioning effects for EAST, where tungsten will be used as a plasma-facing material. In this paper, a few important issues of lithiated tungsten interacting with high-flux deuterium plasma have been studied, such as the effect of lithiation on deuterium retention, the profile of elemental distribution, and the chemical state of lithiated tungsten. Deuterium retention inside both pure and lithiated tungsten has been investigated for the first time in the linear plasma simulator Magnum-PSI by in-situ laser induced breakdown spectroscopy (LIBS). The results indicate that, after deuterium plasma exposure, deuterium retention could be saturated in the lithiation layer, and the lithium in the lithiated layer is chemically bound with deuterium. Moreover, the lithiation can inhibit the blistering on the tungsten surface. These results can be valuable for the application of LIBS as a diagnostic technique for plasma-facing components of tokamaks.
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发表时间: 2012-02
期刊: Nuclear Fusion
影响因子: 3.3
作者:
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发表时间: 2013-02
影响因子: 3.1
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发表时间: 2013-09
期刊: Spectrochimica Acta Part B: Atomic Spectroscopy
影响因子: --
作者:
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DOI: 10.1088/1009-0630/12/6/02
发表时间: 2010-12
影响因子: 1.7
作者:
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DOI: 10.1063/1.4719688
发表时间: 2012-05
期刊: Physics of Plasmas
影响因子: 2.2
作者:
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