Instability of the sheath-plasma resonance

Details Instability of the sheath-plasma resonance Instability of the sheath-plasma resonance

Feb 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988phrvl..60..704s&link_type=abstract

Physical Review Letters (ISSN 0031-9007), vol. 60, Feb. 22, 1988, p. 704-707.

Physics

47

Magnetohydrodynamic Stability, Plasma Electrodes, Plasma Resonance, Cold Plasmas, Plasma Frequencies

Scientific paper

An electrode with a positive dc bias inserted into a Maxwellian plasma is observed to generate coherent high-frequency oscillations at the sheath-plasma antiresonance frequency (omega of less than about omega sub pe). The phenomenon is explained by a negative resistance associated with the finite electron transit time through the sheath. Harmonics of the fundamental are radiated as electromagnetic waves but are clearly shown not to be caused by electron orbital instabilities.

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