Computer simulation of a Cerenkov interaction between obliquely propagating whistler mode waves and an electron beam

Journal Article · Tue Jan 01 04:00:00 EST 1980 · Phys. Fluids; (United States)

DOI:https://doi.org/10.1063/1.862837· OSTI ID:5540168

Kumagai, H; Hashimoto, K; Kimura, I; Matsumoto, H

A Cerenkov type wave-particle interaction between an obliquely propagating whistler mode wave and an electron beam has been investigated by a computer simulation experiment. A one-dimensional electromagnetic simulation code which is especially designed to deal with the obliquely propagating wave is used. Two cases of such a wave-particle interaction have been investigated. In the first case no initial wave is assumed to exist in the simulation model space. In the second case, an obliquely propagating whistler mode wave with a finite amplitude is initially assumed to exist. In both cases after linear wave growth, nonlinear saturation and amplitude oscillation are observed. This nonlinear behavior of the interaction can be interpreted by particle trapping in the wave potential well just as in the case of longitudinal electrostatic waves. Waves excited by Cerenkov radiation from the beam electrons develop as a coherent wave due to the instability and propagate in the magnetized plasma. By the oblique beam-plasma interaction, electromagnetic waves can be amplified. Amplification of the waves observed by this computer simulation may be closely related to VLF hiss noise occurring in the earth's magnetosphere.

• Research Organization: Department of Electrical Engineering II, Kyoto University, Kyoto 606, Japan
• OSTI ID: 5540168
• Journal Information: Phys. Fluids; (United States), Journal Name: Phys. Fluids; (United States) Vol. 23:1; ISSN PFLDA
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700108* -- Fusion Energy-- Plasma Research-- Wave Phenomena
ANALYTICAL SOLUTION
BEAM-PLASMA SYSTEMS
BEAMS
CHERENKOV RADIATION
COLD PLASMA
COMPUTER CALCULATIONS
DIFFERENTIAL EQUATIONS
EARTH ATMOSPHERE
ELECTROMAGNETIC RADIATION
ELECTRON BEAMS
EQUATIONS
EQUATIONS OF MOTION
FOURIER TRANSFORMATION
INSTABILITY
INTEGRAL TRANSFORMATIONS
INTERACTIONS
LAPLACE TRANSFORMATION
LEPTON BEAMS
MAGNETIC FIELDS
MAGNETOSPHERE
MAXWELL EQUATIONS
NOISE
NONLINEAR PROBLEMS
ONE-DIMENSIONAL CALCULATIONS
PARTICLE BEAMS
PLASMA
PLASMA INSTABILITY
PLASMA SIMULATION
RADIATIONS
RADIO NOISE
RADIOWAVE RADIATION
SATURATION
TRANSFORMATIONS
WHISTLERS