Wave propagation in an ion beamplasma system
Abstract
Analytical and numerical calculations of wave propagation in stable and unstable ionbeamplasma systems are reported. The linearized Vlasov equation and a zeroorder distribution function are used in the computations, and the governing equations are solved as a boundaryvalue problem. Propagation characteristics of ionacoustic waves in the beamplasma system are studied by numerical calculation of the density perturbation, with special attention given to the difference between the propagation of waves generated by a velocity modulation and a density modulation of the ion beam. It is found that the wave propagation characteristics are strongly dependent on the form of modulation, that a perturbation experiences initial growth and subsequent amplitude modulation in the case of velocity modulation, and that density modulation produces only a monotonically decaying amplitude. These theoretical results are shown to be in excellent agreement with the experimental observations of Sato et al. (1977).
 Publication:

Plasma Physics
 Pub Date:
 February 1979
 DOI:
 10.1088/00321028/21/2/006
 Bibcode:
 1979PlPh...21..173J
 Keywords:

 Ion Beams;
 Magnetohydrodynamic Stability;
 Plasma Waves;
 PlasmaParticle Interactions;
 Wave Propagation;
 Equations Of Motion;
 Ion Acoustic Waves;
 Perturbation Theory;
 Poisson Equation;
 Vlasov Equations;
 Plasma Physics