Deuterium retention and out-gassing from beryllium oxide on beryllium

Roth, J.; Wampler, W. R.; Oberkofler, M.; van Deusen, S.; Elgeti, S.

doi:10.1016/j.jnucmat.2014.06.015

Deuterium retention and out-gassing from beryllium oxide on beryllium

Journal Article · Fri Jun 27 00:00:00 EDT 2014 · Journal of Nuclear Materials

DOI:https://doi.org/10.1016/j.jnucmat.2014.06.015· OSTI ID:1140769

Roth, J. ^[1]; Wampler, W. R. ^[2]; Oberkofler, M. ^[1]; van Deusen, S. ^[2]; Elgeti, S. ^[1]

Max Planck Inst. for Plasmaphysics, Garching (Germany)
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

We studied the desorption of D implanted into Be with a superficial oxide layer. We found that the different oxide thicknesses and implantation at different energies resulted in a strong variation of the fraction stopped within the oxide layer. Thermal desorption of D was subsequently performed, intermitted by nuclear reaction analysis for assessment of the D depth distributions and total retained amounts. Moreover, for the conditions, where part of the D was deposited in the Be substrate, a sharp decrease of the retained amount of D occurs around 200 °C. This is attributed to the release from metallic Be. Correspondingly, the D and O depth profiles show that above 200 °C the remaining D is only retained in the BeO layer. Apparently, the superficial BeO layer does not act as a diffusion barrier for D that is released from the metallic substrate. The retained amount of D deposited within the BeO layer decreases steadily and is not completely released at 350 °C, the foreseen bake-out temperature in ITER.

View Accepted Manuscript (DOE)

Research Organization:: Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC04-94AL85000

OSTI ID:: 1140769

Alternate ID(s):: OSTI ID: 22398310

Report Number(s):: SAND--2014-0642J; PII: S0022311514003729

Journal Information:: Journal of Nuclear Materials, Journal Name: Journal of Nuclear Materials Journal Issue: 1-3 Vol. 453; ISSN 0022-3115

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Molecular dynamics simulation of beryllium oxide irradiated by deuterium ions: sputtering and reflection Hodille, E. A.; Byggmästar, J.; Safi, E. Journal of Physics: Condensed Matter, Vol. 31, Issue 18 https://doi.org/10.1088/1361-648x/ab04d7	journal	March 2019

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