Accelerated/reduced growth of tungsten fuzz by deposition of metals
Accelerated/reduced growth of tungsten fuzz by deposition of metals
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DOI：
10.1016/j.jnucmat.2021.152844
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发表时间：
2021-02-05
影响因子：
3.1
通讯作者：
Ohno, Noriyasu
中科院分区：
文献类型：
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作者：
Kajita, Shin;Morgan, Thomas;Ohno, Noriyasu
从氦（He）等离子体辐照钨在Magnum-PSI设备中进行，氦等离子体诱导的纤维状纳米结构（绒毛）上的金属沉积的影响进行了讨论。发现如果存在来自源的显著金属杂质，则在等离子体圆柱体的中心处不形成绒毛。金属杂质（主要是钼和铜）的沉积抵消了绒毛的生长。除了来自源的金属的影响之外，我们在样品附近安装了溅射源，以复制聚变装置中的沉积环境。在He通量为1.3 x 10（26）m（-2）时，模糊层的厚度接近7 μ m，约为未沉积时的5倍，表明由于钨的沉积，模糊层的生长速度显着加快。(C)2021爱思唯尔有限公司版权所有。
From the helium (He) plasma irradiations to tungsten performed in the Magnum-PSI device, the effects of deposition of metals on the helium-plasma induced fiberform nanostructures (fuzz) are discussed. It was found that fuzz was not formed at the center of the plasma cylinder if there were significant metallic impurities from the source. Deposition of metallic impurities (mainly molybdenum and copper) counter-acted the growth of fuzz. In addition to the effects of metals from the source, we installed a sputtering source near the sample to replicate the deposition environment in fusion devices. The thickness of fuzzy layer was similar to 7 mu m, which was about five times greater than that without deposition, at the He flux of 1.3 x 10(26) m(-2), suggesting that the growth rate of fuzz layer was significantly accelerated due to the deposition of tungsten. (C) 2021 Elsevier B.V. All rights reserved.