Escape factors for thermionic cathodes in atomic gases in a wide electric field range
Benilov, M S; Naidis, G V; Petrovic, Z Lj; Radmilovic-Radjenovic, M; Stojkovic, A; Benilov, M S; Departamento de Física, Universidade da Madeira, Largo do Município, 9000 Funchal, Portugal; Naidis, G V; Institute for High Temperatures of the Russian Academy of Sciences, Izhorskaya 13/19, Moscow 125412, Russia; Petrovic, Z Lj; Institute of Physics, POB 68, 11080 Zemun, Belgrade, Serbia; Radmilovic-Radjenovic, M; Institute of Physics, POB 68, 11080 Zemun, Belgrade, Serbia; Stojkovic, A; Institute of Physics, POB 68, 11080 Zemun, Belgrade, Serbia
Журнал:
Journal of Physics D: Applied Physics
Дата:
2006-07-21
Аннотация:
An approximate analytical expression is obtained for the escape factors for thermionically emitting cathodes in atomic gases that is uniformly valid at all values of the reduced electric field. This expression is used for evaluation of the escape factors in neon, helium and mercury. An independent evaluation is performed by means of Monte Carlo simulations. The analytical results are in good agreement with the results of Monte Carlo simulations, both for reflecting and non-reflecting cathodes.
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