Chemical and physical erosion of carbon and metallic substrates containing lithium during low-energy deuterium ion irradiation
作者： M. Nieto-Perez , J.P. Allain , B. Heim , C.N. Taylor
DOI: 10.1016/J.JNUCMAT.2010.10.078
关键词: Desorption 、 Lithium 、 Graphite 、 Irradiation 、 X-ray photoelectron spectroscopy 、 Sputtering 、 Oxide 、 Carbon 、 Analytical chemistry 、 Chemistry
摘要: Abstract Lithium deposition on Grade ATJ graphite substrates and metallic under low-energy D 2 + irradiation are compared. Transient steady-state release rate of ejected species measured for non-lithiated lithiated surfaces. Irradiation fluxes order 1015 cm−2 s−1 exposed samples while monitored with a line-of-sight quadrupole mass spectrometer. For the dominant emission channels D2O HDO indicate importance lithium, water breakdown at surface oxide formation desorption dynamics. Exponential decay in transient is found graphite, indicating that near super-saturation atoms vacuum interface presence lithium atoms. In situ X-ray photoelectron spectroscopy (XPS) analysis corroborates this result. Lithium-coatings Mo demonstrate high sputtering rates; however depleted Li/Mo surfaces quickly recovered when heated to temperatures 500 K.
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