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Title: 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:
 [1];  [2];  [1];  [2];  [1]
  1. Max Planck Inst. for Plasmaphysics, Garching (Germany)
  2. 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:
Journal Article: 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. doi: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. doi: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},
issn = {0022-3115},
number = 1-3,
volume = 453,
place = {United States},
year = {2014},
month = {6}
}

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Cited by: 2 works
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