Electromagnetic effects on parametric instabilities of Langmuir waves

Journal Article · Tue Mar 01 04:00:00 EST 1988 · Phys. Fluids; (United States)

DOI:https://doi.org/10.1063/1.866836· OSTI ID:5471236

Akimoto, K

Electromagnetic effects on parametric instabilities of Langmuir waves in unmagnetized plasmas are investigated. A fully electromagnetic treatment of these instabilities removes discontinuities of frequencies that are found to be present in the wave vector space of the electrostatic dispersion equation. Furthermore, it was found that a pair of novel parametric instabilities of Langmuir pump waves emerge owing to the electromagnetic effects. Both of them excite electromagnetic plasma waves near the plasma frequency. One of them is the hybrid modulational instability, which is a four-wave up-conversion process. As the wave vector of the pump wave increases the hybrid parametric decay instability becomes dominant. This is a three-wave down-conversion instability, which has been investigated previously (Space Sci. Rev. 26, 3 (1980); Phys. Rev. A 27, 552 (1983); Astrophys. J. 308, 954 (1986)).

• Research Organization: Earth and Space Sciences Division and Applied Theoretical Physics Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
• OSTI ID: 5471236
• Journal Information: Phys. Fluids; (United States), Journal Name: Phys. Fluids; (United States) Vol. 31:3; ISSN PFLDA
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700107* -- Fusion Energy-- Plasma Research-- Instabilities
CONVERSION
DIFFERENTIAL EQUATIONS
ELECTROMAGNETISM
EQUATIONS
EQUATIONS OF MOTION
EQUATIONS OF STATE
INSTABILITY
MAGNETISM
MAXWELL EQUATIONS
PARAMETRIC INSTABILITIES
PARTIAL DIFFERENTIAL EQUATIONS
PLASMA
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
PLASMA WAVES