Effects of background gas impurities during D+ irradiation on D trapping in single crystal tungsten

Poon, M.C.; Macaulay-Newcombe, R.G.; Davis, James W.; Haasz, A.A.

doi:10.1016/j.jnucmat.2004.09.042

Cited by 31 publications

(44 citation statements)

References 10 publications

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“…A review of hydrogen bubbles in metals by Condon and Schober [22] outlines some possible cavity formation mechanisms. The mechanism of near-surface plastic deformation caused by deuterium supersaturation within the near-surface layer was considered by Poon [23] for the explanation of TDS spectra for W single crystals irradiated with 500 eV D ions.…”

Section: Resultsmentioning

confidence: 99%

Depth distribution of deuterium in single- and polycrystalline tungsten up to depths of several micrometers

Alimov

Roth

Mayer

2005

Journal of Nuclear Materials

137

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Section: Resultsmentioning

confidence: 99%

Depth distribution of deuterium in single- and polycrystalline tungsten up to depths of several micrometers

Alimov

Roth

Mayer

2005

Journal of Nuclear Materials

137

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“…In literature, various defect types have been identified in the temperature range 400-650K, i.e., dislocations and grain boundaries [25] [26], and single vacancies (with one [26] [27] or two D atoms trapped [28]). The high temperature peak is usually associated with deuterium trapped in vacancy clusters [22] [25] [29].…”

Section: Thermal Desorption Spectroscopymentioning

confidence: 99%

Saturation of deuterium retention in self-damaged tungsten exposed to high-flux plasmas

Hoen¹,

Tyburska-Püschel²,

Ertl³

et al. 2012

Nucl. Fusion

103

110

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Abstract. Polycrystalline, annealed tungsten targets were bombarded with 12.3 MeV W 4+ ions to various damage levels. Deuterium was implanted by high-flux plasmas in Pilot-PSI ( >10 24 m -2 s -1 ) at a surface temperature below 525 K. Deuterium retention has been studied by Nuclear Reaction Analysis and by Thermal Desorption Spectroscopy. We found that deuterium retention is strongly enhanced by the tungsten bombardment and that saturation occurs at a W 4+ fluence of about 3·10 17 m -2 . The maximum deuterium concentration in the damaged region was measured to be 1.4 at.%. This is in accordance with other experiments that were carried out at much lower fluxes. We therefore conclude that the saturation behaviour and the maximum retention are not affected by the high fluxes used in our experiments.A simple geometric model is presented that assumes that the saturation solely originates in the tungsten irradiation and that explains it in terms of overlapping saturated volumes. The saturated volume per incident MeV ion amounts to 3·10 4 nm 3 . From our results, we are able to obtain an approximate value for the average occupation number of the vacancies.

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“…There are only indications that the vacuum conditions during D ion irradiation could influence deuterium retention in single crystal tungsten: a higher level of background impurities leads to a higher D retention [32,43].…”

Section: Introductionmentioning

confidence: 99%

Deuterium retention in tungsten exposed to low-energy, high-flux clean and carbon-seeded deuterium plasmas

Alimov¹,

Roth²,

Causey³

et al. 2008

Journal of Nuclear Materials

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Effects of background gas impurities during D+ irradiation on D trapping in single crystal tungsten

Cited by 31 publications

References 10 publications

Depth distribution of deuterium in single- and polycrystalline tungsten up to depths of several micrometers

Depth distribution of deuterium in single- and polycrystalline tungsten up to depths of several micrometers

Saturation of deuterium retention in self-damaged tungsten exposed to high-flux plasmas

Deuterium retention in tungsten exposed to low-energy, high-flux clean and carbon-seeded deuterium plasmas

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