Dynamics of hydrogenic retention in molybdenum: First results from DIONISOS
2007; Elsevier BV; Volume: 363-365; Linguagem: Inglês
10.1016/j.jnucmat.2007.01.135
ISSN1873-4820
AutoresG.M. Wright, D.G. Whyte, B. Lipschultz, R. Doerner, J.G. Kulpin,
Tópico(s)Nuclear Materials and Properties
ResumoThe DIONISOS (Dynamics of ION Implantation and Sputtering of Surfaces) experiment is described. DIONISOS features steady-state plasma exposure of material surfaces, with simultaneous, in situ, non-destructive depth profiling on the same surfaces with ion beam analysis (IBA). A steady-state RF helicon plasma source produces a fusion 'edge-like' low temperature (T ∼ 1–10 eV), high-density (⩽1017–18 m−3), steady-state, cylindrical, plasma (ϕ ∼ 50 mm). The exposure stage allows for the control of sample surface temperature (300–800 K), incident ion energy (10–500 eV), and ion beam and magnetic field incident angle (360° rotation), during bombardment with high plasma flux (∼1020–1022 s−1 m−2). First results from DIONISOS show a large and evolving concentration of deuterium (∼1000 appm) trapped deep (∼5 μm) in molybdenum. IBA during plasma exposures shows the surface dynamic deuterium inventory increased by a factor of 2 over the 'long-term' trapped inventory at an incident ion flux density of ∼1.5 × 1021 D/m2 s.
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