Parametric plasma instabilities in a low-frequency electromagnetic wave

Journal Article · Sun Nov 01 04:00:00 EST 1981 · Sov. J. Plasma Phys. (Engl. Transl.); (United States)

OSTI ID:5278091

Korzh, A F; Lapshin, V I; Stepanov, K N

Longitudinal waves are analyzed in a low-pressure plasma in an external magnetic field and in the alternating electric and magnetic fields of a large-amplitude fast magnetosonic wave. The magnetosonic wave has a frequency of the order of the ion cyclotron frequency and is propagating nearly across the constant magnetic field. In this situation it is sufficient to consider the effect of the wave's magnetic field on the electrons only. A general dispersion relation is derived to describe parametric effects in such a plasma. The magnetic field of the pump wave causes pronounced changes in the dispersion properties of longitudinal waves of the plasma with a frequency of the order of the ion cyclotron frequency if the displacement of the electrons by the wave magnetic field is of the order of the transverse wavelength. A detailed study is made of the parametric excitation of electron sound. If the wave has weak magnetic field that can change the parametric-resonance conditions, but the maximum growth rate does not change. It is also possible that the wave growth will be suppressed.

• Research Organization: Physicotechnical Institute, Academy of Sciences of the Ukrainian SSR, Khar'kov
• OSTI ID: 5278091
• Journal Information: Sov. J. Plasma Phys. (Engl. Transl.); (United States), Journal Name: Sov. J. Plasma Phys. (Engl. Transl.); (United States) Vol. 7:6; ISSN SJPPD
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700107* -- Fusion Energy-- Plasma Research-- Instabilities
700108 -- Fusion Energy-- Plasma Research-- Wave Phenomena
ELECTRIC FIELDS
ELECTROMAGNETIC RADIATION
HYDROMAGNETIC WAVES
INSTABILITY
LOW-BETA PLASMA
MAGNETIC FIELDS
PARAMETRIC INSTABILITIES
PLASMA
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
RADIATIONS
RESONANCE