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Reduced D trapping by plasma-implanted He nanobubbles in radiation damaged tungsten

机译：通过等离子体植入的D捕获的纳米杆菌在辐射损坏钨中减少

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摘要

The presence of a plasma-implanted helium nanobubble layer significantly reduces deuterium (D) retention in undamaged commercial ITER grade tungsten (W). In this paper, we show evidence that this phenomenon can survive displacement damage. A He plasma exposure (sample temperature 643 K, ion flux 10(22) m(-2) s(-1) at 100eV, fluence 10(25) m(-2)) pre-treatment was performed to create a thin He nanobubble layer in the first similar to 15 nm of ITER grade W samples. Samples were then irradiated by 5 MeV Cu ions at room temperature to create 0.001 to 0.1 dpa with peak damage rates occurring about 860nm below the sample surface. Samples without He plasma exposure pre-treatment were also irradiated by 5 MeV Cu ions to provide a controlled baseline. All samples were subsequently exposed to D plasma at 373 K to a fluence of 10(24) m(-2). Nuclear reaction analysis results show that across a range of peak dpa ranging from 0.001 to 0.1 dpa, D retention inventory in the samples with He plasma exposure pre-treatment is reduced by a factor of two compared to samples without He plasma exposure pre-treatment. Transmission electron microscopy directly showed a surviving nanobubble layer after 0.1 dpa damage. However, the thickness of the bubble layer appears to have been reduced. The results suggest that the plasma-implanted He nanobubble layer can survive radiation damage and still function to reduce D diffusion and retention in tungsten-based plasma facing components.
机译：血浆植入氦纳米蜂制层的存在显着降低了未损坏的商业浸渍级钨（W）中的氘（D）保留。在本文中，我们证明了这种现象可以存活位移损伤。在100eV的血浆暴露（样品温度643k，离子通量10（22）m（-2）（-2）（-2）s（-1），流量10（25）m（-2））进行预处理以产生薄的他在第一种类似于15nm的浸渍级W样品中的纳米胶浆层。然后将样品在室温下在室温下照射5meV Cu离子，以产生约860nm的峰值损伤率的0.001至0.1dPa在样品表面下发生约860nm。没有他血浆暴露预处理的样品也被5meV Cu离子照射，以提供受控基线。随后将所有样品暴露于D血浆，在373k到注量10（24）m（-2）。核反应分析结果表明，在血浆暴露预处理的样品中，在样品中的一系列峰DPA，与样品的样品中的D保留库存减少了两倍，而没有血浆暴露预处理。透射电子显微镜直接在0.1dPa损伤后直接显示出存活的纳米泡层。然而，似乎气泡层的厚度已经减少。结果表明，等离子体植入的HE纳米蜂块层可以存活辐射损伤，仍然可以降低基于钨的等离子体组件的D扩散和保留。

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  • 来源
    《Nuclear fusion》 |2019年第6期|066040.1-066040.7|共7页
  • 作者

    Bai Q.; Zheng P. F.; Xu M.; Tynan G. R.; Simmonds M. J.; Doerner R. P.; Xu C.; Zhu J. P.; Fu E. G.;

  • 作者单位

    Southwestern Inst Phys Chengdu 610041 Sichuan Peoples R China;

    Southwestern Inst Phys Chengdu 610041 Sichuan Peoples R China;

    Southwestern Inst Phys Chengdu 610041 Sichuan Peoples R China;

    Southwestern Inst Phys Chengdu 610041 Sichuan Peoples R China|Univ Calif San Diego Ctr Energy Res La Jolla CA 92093 USA|Univ Calif San Diego Dept Mech & Aerosp Engn La Jolla CA 92093 USA;

    Univ Calif San Diego Ctr Energy Res La Jolla CA 92093 USA;

    Univ Calif San Diego Ctr Energy Res La Jolla CA 92093 USA;

    Peking Univ Sch Phys State Key Lab Nucl Phys & Technol Beijing 100871 Peoples R China;

    Peking Univ Sch Phys State Key Lab Nucl Phys & Technol Beijing 100871 Peoples R China;

    Peking Univ Sch Phys State Key Lab Nucl Phys & Technol Beijing 100871 Peoples R China;

  • 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

    He nanobubble; radiation damage; deuterium retention; tungsten;

    机译：他纳米博布;辐射损伤;氘保留;钨;

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