Weakly nonlinear ion sound waves in gravitational systems
Plasma Physics
2020-05-06 v1
Abstract
Ion sound waves are studied in a plasma subject to gravitational field. Such systems are interesting by exhibiting a wave growth that is a result of energy flux conservation in inhomogeneous systems. The increasing wave amplitude gives rise to an enhanced interaction between waves and plasma particles that can be modeled by a modified Korteweg-de Vries equation. Analytical results are compared with numerical Particle-in-Cell simulations of the problem. Our code assumes isothermally Boltzmann distributed electrons while the ion component is treated as a collection of individual particles interacting through collective electric fields. Deviations from quasi neutrality are allowed for.
Cite
@article{arxiv.1912.09173,
title = {Weakly nonlinear ion sound waves in gravitational systems},
author = {P. Guio and H. L. Pecseli},
journal= {arXiv preprint arXiv:1912.09173},
year = {2020}
}
Comments
30 pages, 9 figures