The virtual cathode as a transient double sheath

descriptionPublicationkeyboard_double_arrow_right Article 15 Sep 1988 English Publisher:AIP PublishingJournal:Journal of Applied Physics, volume 64, pages 2,927-2,933 (issn: 0021-8979, eissn: 1089-7550,

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Authors: T. Intrator; M. H. Cho; E. Y. Wang; N. Hershkowitz; D. Diebold; J. DeKock;

doi: 10.1063/1.341552

The virtual cathode as a transient double sheath

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Abstract

The two-dimensional plasma potential measurements are given of a space-charge dominated double sheath near a hot cathode. Laboratory data show that a virtual cathode is a self-consistent solution only for a transient cathode-plasma system. Slow charge exchange ions get trapped in the potential dip that forms the virtual cathode and eventually destroy it.

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