Deuterium retention and out-gassing from beryllium oxide on beryllium
Abstract
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.
- Authors:
-
- Max Planck Inst. for Plasmaphysics, Garching (Germany)
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Publication Date:
- Research Org.:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA)
- OSTI Identifier:
- 1140769
- Report Number(s):
- SAND-2014-0642J
Journal ID: ISSN 0022-3115; PII: S0022311514003729; TRN: US1600452
- Grant/Contract Number:
- AC04-94AL85000
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Nuclear Materials
- Additional Journal Information:
- Journal Volume: 453; Journal Issue: 1-3; Journal ID: ISSN 0022-3115
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 07 ISOTOPE AND RADIATION SOURCES
Citation Formats
Roth, J., Wampler, W. R., Oberkofler, M., van Deusen, S., and Elgeti, S. Deuterium retention and out-gassing from beryllium oxide on beryllium. United States: N. p., 2014.
Web. doi:10.1016/j.jnucmat.2014.06.015.
Roth, J., Wampler, W. R., Oberkofler, M., van Deusen, S., & Elgeti, S. Deuterium retention and out-gassing from beryllium oxide on beryllium. United States. https://doi.org/10.1016/j.jnucmat.2014.06.015
Roth, J., Wampler, W. R., Oberkofler, M., van Deusen, S., and Elgeti, S. Fri .
"Deuterium retention and out-gassing from beryllium oxide on beryllium". United States. https://doi.org/10.1016/j.jnucmat.2014.06.015. https://www.osti.gov/servlets/purl/1140769.
@article{osti_1140769,
title = {Deuterium retention and out-gassing from beryllium oxide on beryllium},
author = {Roth, J. and Wampler, W. R. and Oberkofler, M. and van Deusen, S. and Elgeti, S.},
abstractNote = {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.},
doi = {10.1016/j.jnucmat.2014.06.015},
journal = {Journal of Nuclear Materials},
number = 1-3,
volume = 453,
place = {United States},
year = {Fri Jun 27 00:00:00 EDT 2014},
month = {Fri Jun 27 00:00:00 EDT 2014}
}
Web of Science
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