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Suppressed D retention by H Co-implantation in RAFM steels: coupling effects of H
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DOI：10.1016/j.nme.2026.102096.png)
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Abstract
En 中文
The deuterium (D) retention in reduced-activation ferritic/martensitic (RAFM) steels under simultaneous hydrogen (H) and D plasma exposure was investigated, with a focus on the coupling effects of pre-existing displacement damage. Controlled damage profiles were introduced via heavy-ion irradiation using 4.5 MeV and 387 MeV Fe ions. The results indicate that heavy-ion irradiation significantly enhances D retention and induce high-temperature desorption above 1000 K. Crucially, the co-introduction of H effectively suppresses D retention, especially in the high-temperature regime. These findings imply that in a D-tritium (T) fusion environment, the co-existence of multiple hydrogen isotopes may naturally mitigate T retention, offering positive implications for T management and safety in future fusion reactors.
Keywords:
Deuterium retention
RAFM steels
Heavy ion irradiation
Isotope effect
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