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The double sheath on cathodes of discharges burning in cathode vapour
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Autores
Orientador(es)
Resumo(s)
The model of a collisionless near-cathode space-charge sheath with ionization of atoms
emitted by the cathode surface is considered. Numerical calculations showed that the
mathematical problem is solvable and its solution is unique. In the framework of this model,
the sheath represents a double layer with a potential maximum, with the ions which are
produced before the maximum returning to the cathode surface and those produced after the
maximum escaping into the plasma. Numerical results are given in a form to be readily
applicable in analysis of discharges burning in cathode vapour, such as vacuum arcs. In
particular, the results indicate that the ion backflow coefficient in such discharges exceeds 0.5,
in agreement with values extracted from the experiment.
Descrição
Palavras-chave
Double sheath Cathodes of discharges Cathode vapour . Faculdade de Ciências Extas e da Engenharia
Contexto Educativo
Citação
Benilov, M. S., & Benilova, L. G. (2010). The double sheath on cathodes of discharges burning in cathode vapour. Journal of Physics D: Applied Physics, 43(34), 345204. DOI: 10.1088/0022-3727/43/34/345204
Editora
IOP Publishing