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Title: Deuterium retention and out-gassing from beryllium oxide on beryllium

Journal Article · · Journal of Nuclear Materials
 [1];  [2];  [1];  [2];  [1]
  1. Max Planck Inst. for Plasmaphysics, Garching (Germany)
  2. 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.

Research Organization:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC04-94AL85000
OSTI ID:
1140769
Report Number(s):
SAND-2014-0642J; PII: S0022311514003729; TRN: US1600452
Journal Information:
Journal of Nuclear Materials, Vol. 453, Issue 1-3; ISSN 0022-3115
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 7 works
Citation information provided by
Web of Science

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Cited By (2)

Molecular dynamics simulation of beryllium oxide irradiated by deuterium ions: sputtering and reflection journal March 2019
Optimization on producibility improvement and the recycling process of neutron multipliers for fusion applications journal November 2019

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