[Table of Contents]

Plasma and Fusion Research

Volume 6, 2401026 (2011)

Regular Articles

Effect of Ion Composition on Oblique Magnetosonic Waves
Yuichi KONDO and Mieko TOIDA
Department of Physics, Nagoya University, Nagoya 464-8602, Japan
(Received 6 December 2010 / Accepted 13 January 2011 / Published 1 July 2011)


The effects of ion composition on oblique magnetosonic waves in a two-ion-species plasma are studied theoretically and numerically. First, it is analytically shown that the KdV equation for the low-frequency mode, the lower branch of magnetosonic waves, is valid for amplitudes ε < ε(l−)max, where ε(l−)max is a measure of the upper limit of the amplitude of the rarefactive solitary pulse of the low-frequency mode and is given as a function of the propagation angle of the wave θ, the density ratio and cyclotron frequency ratio of two ion species. The value of ε(l−)max increases with decreasing θ. Next, with electromagnetic particle simulations, the nonlinear evolution of the low- and high-frequency modes is examined. It is demonstrated that shorter-wavelength low- and high-frequency-mode waves are generated from a long-wavelength low-frequency-mode pulse if its amplitude ε exceeds ε(l−)max.


magnetosonic wave, nonlinear wave, soliton, KdV equation, multi-ion-species plasma

DOI: 10.1585/pfr.6.2401026


  • [1] S.J. Buchsbaum, Phys. Fluids 3, 418 (1960).
  • [2] M. Toida and Y. Ohsawa, J. Phys. Soc. Jpn. 63, 573, (1994).
  • [3] M. Toida, Y. Ohsawa and T. Jyounouchi, Phys. Plasmas 2, 3329 (1995).
  • [4] M. Toida, H. Higashino and Y. Ohsawa, J. Phys. Soc. Jpn. 76, 104502 (2007).
  • [5] S. Irie and Y. Ohsawa, Phys. Plasmas 10, 1255 (2003).

This paper may be cited as follows:

Yuichi KONDO and Mieko TOIDA, Plasma Fusion Res. 6, 2401026 (2011).