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Probing helium nano-bubble formation in tungsten with grazing incidence small angle x-ray scattering

机译:用掠入射小角度X射线散射探测钨中氦纳米气泡的形成

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摘要

Helium nano-bubble formation in plasma facing materials has emerged as a major concern for the next-step fusion experiment ITER, where helium plasmas will be used during the tokamak's start-up phase. Here, we demonstrate that grazing incidence small-angle x-ray scattering is a powerful technique for the analysis of helium nano-bubble formation in tungsten. We measured helium bubbles with sizes between 1.5-2.5 nm in tungsten exposed to helium plasma at 700 ℃, where a smaller number of larger bubbles were also observed. Depth distributions can be estimated by taking successive measurements across a range of x-ray incidence angles. Compared with traditional approaches in the field, such as transmission electron microscopy, this technique provides information across a much larger volume with high statistical precision, whilst also being non-destructive.
机译:面向等离子体的材料中氦纳米气泡的形成已成为下一步聚变实验ITER的主要关注点,该实验将在托卡马克的启动阶段使用氦等离子体。在这里,我们证明掠入射小角度X射线散射是分析钨中氦纳米气泡形成的有力技术。我们在700℃下暴露于氦等离子体中的钨中测量了大小在1.5-2.5 nm之间的氦气泡,其中还观察到少量较大的气泡。可以通过在一系列X射线入射角上进行连续测量来估计深度分布。与本领域中的传统方法(例如透射电子显微镜)相比,该技术以高统计精度在更大的体积上提供了信息,同时还具有无损检测的功能。

著录项

  • 来源
    《Nuclear fusion》 |2015年第4期|042001.1-042001.5|共5页
  • 作者单位

    Research School of Physics and Engineering, Australian National University, Canberra, Australia;

    Research School of Physics and Engineering, Australian National University, Canberra, Australia;

    Center for Energy Research, University of California in San Diego, CA, USA;

    Australian Synchrotron, Melbourne, Australia;

    Research School of Physics and Engineering, Australian National University, Canberra, Australia;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    tungsten; helium nano-bubbles; GISAXS; helium damage;

    机译:钨氦纳米气泡GISAXS;氦气损害;
  • 入库时间 2022-08-18 00:42:32

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