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  • Buyanova, M., et al. (författare)
  • Influence of secondary emission yield on the saturation properties of multipactor discharges between two parallel metal plates
  • 2010
  • Ingår i: Physics of Plasmas. - 1070-664X. ; 17:4
  • Tidskriftsartikel (refereegranskat)abstract
    • A detailed numerical simulation analysis is made of the saturation stage of multipactor discharges between two infinite parallel metal plates in vacuum exposed to a rf voltage. The main physical effect causing saturation of the multipactor discharge is increased space charge, as the electron density becomes large. It is found that the properties of the saturation stage depend crucially on the value of the secondary emission yield of the metal surfaces. Below a certain threshold value, the discharge has a two-sided character, but at this threshold the discharge makes an abrupt transition into two decoupled single-sided multipactor discharges containing significantly increased electron densities. The result of the numerical simulations gives a good picture of the saturation properties of the multipactor discharge and is also supplemented by an approximate analytical investigation that highlights and explains the characteristic properties of the observed saturation behavior.
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  • Kossyi, I.A., et al. (författare)
  • Electrical breakdown in space-borne microwave equipment
  • 2010
  • Ingår i: Europhysics News. - 0531-7479. ; 41:6
  • Tidskriftsartikel (refereegranskat)abstract
    • An experimental and numerical investigation is made of multipactor discharges in a coaxial waveguide. Particular attention is given to the determination of the multipactor threshold and the distribution of the impact energy of the electrons. Simulations are carried out for different parameters of the secondary emission coefficient of the electrode surfaces. This makes it possible to determine these parameters through a comparison between the numerical and experimental results. The comparison also shows that the observed multipactor is mainly of polyphase (non-resonant) nature and represents a mixture of single- and double-surface multipactor discharges.
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