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论文类型：期刊论文
发表时间：2015-08-01
发表刊物：21st International Conference on Plasma-Surface Interactions in Controlled Fusion Devices (PSI)
收录刊物：SCIE、EI、CPCI-S、Scopus
卷号：463
页面范围：363-366
ISSN号：0022-3115
摘要：Molecular dynamics simulations are carried out to investigate the formation, growth and bursting of bubbles in tungsten exposed to the irradiation of an extremely high deuterium flux. It is found that the bubbles form in the region near the location of the implanted ion distribution peaks, and that the effect of the substrate temperature on the bubble formation depth is negligible; it is also found that the percentage of deuterium that is found in D-2 molecules increases as the bubble grows, and that the evolution of the bubble's internal pressure is strongly associated with the properties of its surrounding structure. The simulations display the development of a dome-shaped structure at the tungsten surface during the bubble growth. The merging of two deuterium bubbles is also observed. The present simulations also show that the bubble bursts by generating a partially opened lid, which has already been observed in previous independent experiments. (C) 2014 Elsevier B.V. All rights reserved.