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Depth profiling of the modification induced by high-flux deuterium plasma in tungsten and tungsten-tantalum alloys

(2014) NUCLEAR FUSION. 54(12).
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Abstract
The present work reports the results of an experimental study of the depth distribution and fluence dependence of deuterium plasma-induced material modification of tungsten and tungsten-tantalum alloys. Plasma-induced damage was created by exposure to high-flux deuterium plasma in the plasma generator Pilot-PSI, followed by the degassing and subsequent decoration of created defects with deuterium by another plasma exposure. The depth distribution of deuterium from the decorating exposure reflects the distribution of plasma-induced defects. Depth profiling of this decorating deuterium, was performed by nuclear reaction analysis. It was found that plasma-induced material modification, which manifested itself as an increase of the deuterium concentration in the samples pre-exposed with high-flux plasma in comparison to the samples without such pre-exposure extends down to more than 5 mu m from the surface. This increase features a tendency to saturation with increasing fluence of the damaging high-flux plasma. Over the entire probing range, with the exception of the narrow surface region and the deep region beyond 5 mu m, the deuterium content is lower in pre-exposed W-Ta than in similarly pre-exposed W. Sub-surface features formed as a result of high-flux plasma exposure were studied with the help of focused ion beam cross-sectioning. W was found to contain plasma-induced cavities down to much larger depth than W-Ta.
Keywords
deuterium retention, RETENTION, linear plasma generator Pilot-PSI, tungsten, tungsten-tantalum

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Chicago
Zayachuk, Yevhen, A Manhard, MHJ t’ Hoen, W Jacob, PAZ van Emmichoven, and Guido Van Oost. 2014. “Depth Profiling of the Modification Induced by High-flux Deuterium Plasma in Tungsten and Tungsten-tantalum Alloys.” Nuclear Fusion 54 (12).
APA
Zayachuk, Y., Manhard, A., t’ Hoen, M., Jacob, W., van Emmichoven, P., & Van Oost, G. (2014). Depth profiling of the modification induced by high-flux deuterium plasma in tungsten and tungsten-tantalum alloys. NUCLEAR FUSION, 54(12).
Vancouver
1.
Zayachuk Y, Manhard A, t’ Hoen M, Jacob W, van Emmichoven P, Van Oost G. Depth profiling of the modification induced by high-flux deuterium plasma in tungsten and tungsten-tantalum alloys. NUCLEAR FUSION. 2014;54(12).
MLA
Zayachuk, Yevhen et al. “Depth Profiling of the Modification Induced by High-flux Deuterium Plasma in Tungsten and Tungsten-tantalum Alloys.” NUCLEAR FUSION 54.12 (2014): n. pag. Print.
@article{5878435,
  abstract     = {The present work reports the results of an experimental study of the depth distribution and fluence dependence of deuterium plasma-induced material modification of tungsten and tungsten-tantalum alloys. Plasma-induced damage was created by exposure to high-flux deuterium plasma in the plasma generator Pilot-PSI, followed by the degassing and subsequent decoration of created defects with deuterium by another plasma exposure. The depth distribution of deuterium from the decorating exposure reflects the distribution of plasma-induced defects. Depth profiling of this decorating deuterium, was performed by nuclear reaction analysis. It was found that plasma-induced material modification, which manifested itself as an increase of the deuterium concentration in the samples pre-exposed with high-flux plasma in comparison to the samples without such pre-exposure extends down to more than 5 mu m from the surface. This increase features a tendency to saturation with increasing fluence of the damaging high-flux plasma. Over the entire probing range, with the exception of the narrow surface region and the deep region beyond 5 mu m, the deuterium content is lower in pre-exposed W-Ta than in similarly pre-exposed W. Sub-surface features formed as a result of high-flux plasma exposure were studied with the help of focused ion beam cross-sectioning. W was found to contain plasma-induced cavities down to much larger depth than W-Ta.},
  articleno    = {123013},
  author       = {Zayachuk, Yevhen and Manhard, A and t'Hoen, MHJ and Jacob, W and van Emmichoven, PAZ and Van Oost, Guido},
  issn         = {0029-5515},
  journal      = {NUCLEAR FUSION},
  language     = {eng},
  number       = {12},
  pages        = {6},
  title        = {Depth profiling of the modification induced by high-flux deuterium plasma in tungsten and tungsten-tantalum alloys},
  url          = {http://dx.doi.org/10.1088/0029-5515/54/12/123013},
  volume       = {54},
  year         = {2014},
}

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