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Simulation of thermal instability in non-uniformities on the surface of cathodes of vacuum arcs
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Orientador(es)
Resumo(s)
Instability stemming from the strong dependence
of electron emission current on the local surface
temperature plays an important role in current transfer to
hot cathodes of arc discharges. In the case of vacuum arcs,
this instability may lead to micro explosions on cathode
surface even if the surface is planar. This work is
concerned with numerical simulation of effect produced by
surface non-uniformities. It is found that the effect is
non-trivial: the presence of surface non-uniformities can
not only accelerate the development of the instability,
which is what one would expect intuitively, but also slow it
down and even suppress.
Descrição
Palavras-chave
Vacuum arcs Cathodes Thermal instability . Faculdade de Ciências Exatas e da Engenharia
Contexto Educativo
Citação
Cunha, M. D., Benilov, M. S., Hartmann, W., & Wenzel, N. (2016, September). Simulation of thermal instability in non-uniformities on the surface of cathodes of vacuum arcs. In 2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV) (Vol. 1, pp. 1-4). IEEE.
Editora
IEEE