Detuning effect of negative ions on oscillating-two-stream instabilities of electromagnetic waves

Journal Article · Sun Sep 01 00:00:00 EDT 1996 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.871593· OSTI ID:286967

Cho, G S; Park, J R; Lee, J Y; Kong, H J ^[1]

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1. Department of Physics and Laser Science Research Center, Korea Advanced Institute of Science and Technology (KAIST), 373-1 Kusong-dong Yusong-gu Taejon 305-701, South (Korea)

It is proved analytically in the three-fluid theory of a plasma that the effect of negative ions on the oscillating-two-stream instability results in a change of the frequency mismatch between the electromagnetic pump and the electron plasma wave. Ion thermal and collision terms are assumed to be negligible. This negative ion effect can completely detune and suppress the instability, if the number density ratio of negative to positive ions is greater than 2({ital v}{sup 2}{sub 0}/{ital v}{sup 2}{sub th}), where {ital v}{sub 0} is the oscillation velocity amplitude of electrons under the pump and {ital v}{sub th} is the electron thermal speed. {copyright} {ital 1996 American Institute of Physics.}

• OSTI ID: 286967
• Journal Information: Physics of Plasmas, Vol. 3, Issue 9; Other Information: PBD: Sep 1996
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION
TWO-STREAM INSTABILITY
ELECTROMAGNETIC FIELDS
ELECTRON PLASMA WAVES
DISPERSION RELATIONS
PLASMA FLUID EQUATIONS