The virtual cathode as a transient double sheath

The virtual cathode as a transient double sheath

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 t...

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Veröffentlicht in:Journal of applied physics 1988-09, Vol.64 (6), p.2927-2933
Hauptverfasser: Intrator, T., Cho, M. H., Wang, E. Y., Hershkowitz, N., Diebold, D.
Format: Artikel
Sprache:eng
Schlagworte:
Exact sciences and technology
Physics
Physics of gases, plasmas and electric discharges
Physics of plasmas and electric discharges
Plasma interactions (nonlaser)
Plasma Physics
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Zusammenfassung: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.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.341552