2024-03-28T10:59:46Z
https://nagoya.repo.nii.ac.jp/oai
oai:nagoya.repo.nii.ac.jp:00007111
2023-01-16T03:52:38Z
336:695:696
Damping of magnetohydrodynamic disturbances in multi-ion-species plasmas
Toida, Mieko
Yoshiya, Takashi
Ohsawa, Yukiharu
open access
Copyright (2006) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
The evolution of macroscopic magnetohydrodynamic disturbances across a magnetic field is studied, with particular attention to the effect of multiple ion species. Analyses are carried out on disturbances where the initial magnetic profiles are sinusoidal. Both the theory and electromagnetic simulations show that, in a single-ion-species plasma, the disturbance is undamped, with its energy oscillating between the magnetic field and ion velocity. In a multi-ion-species plasma, however, it is initially damped, owing to the phase mixing of the magnetosonic mode and the modes having ion-ion hybrid cutoff frequencies. Furthermore, it is found from long-time simulations that the amplitude of the disturbance continues to decrease in a multi-ion-species plasma. This is due to nonlinear mode couplings. The magnetic energy is irreversibly transferred to the ions.
American Institute of Physics
2006-04
eng
journal article
VoR
http://hdl.handle.net/2237/8785
https://nagoya.repo.nii.ac.jp/records/7111
https://doi.org/10.1063/1.2188404
1070-664X
PHYSICS OF PLASMAS
13
4
042302
042302
https://nagoya.repo.nii.ac.jp/record/7111/files/PhysPlasmas_13-42302.pdf
application/pdf
357.8 kB
2018-02-19