Computer Science – Sound
Scientific paper
Nov 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005ssrv..121..343s&link_type=abstract
Space Science Reviews, Volume 121, Issue 1-4, pp. 343-351
Computer Science
Sound
2
Shear Flows, Plasma Instabilities, Kinetic AlfvÉ, N Wave, Ion-Sound Wave
Scientific paper
We study instabilities driven by a sheared plasma flow in the low-frequency domain. Two unstable branches are found: the ion-sound mode and the kinetic Alfvén mode. Both instabilities are aperiodic. The ion-sound instability does not depend on the plasma β (gas/magnetic pressure ratio) and has a maximum growth rate of about 0.1 of the velocity gradient dV 0/dx. On the other hand, the kinetic Alfvén instability is stronger for larger β and dominates the ion-sound instability for β > 0.05. Possible applications for space plasmas are shortly discussed.
Goossens Marcel
Siversky Taras
Voitenko Yuriy
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