Kinetic instability of ion acoustic mode in permeating plasmas

J. Vranjes, S. Poedts, Zahida Ehsan

doi:10.1063/1.3174435

Kinetic instability of ion acoustic mode in permeating plasmas

DOI PDF 被引用文献1件

J. Vranjes

K. U. Leuven 1 Center for Plasma Astrophysics and Leuven Mathematical Modeling and Computational Science Center (LMCC), , Celestijnenlaan 200B, 3001 Leuven, Belgium
S. Poedts

K. U. Leuven 1 Center for Plasma Astrophysics and Leuven Mathematical Modeling and Computational Science Center (LMCC), , Celestijnenlaan 200B, 3001 Leuven, Belgium
Zahida Ehsan

GC University 2 Salam Chair in Department of Physics, , Lahore 54000, Pakistan and Plasma Physics Group, Blackett Laboratory, , London SW7 2AZ, United Kingdom

抄録

<jats:p>In plasmas with electron drift (current) relative to static ions, the ion acoustic wave is subject to the kinetic instability which takes place if the directed electron speed exceeds the ion acoustic speed. The instability threshold becomes different in the case of one quasineutral electron-ion plasma propagating through another static quasineutral (target) plasma. The threshold velocity of the propagating plasma may be well below the ion acoustic speed of the static plasma. Such a currentless instability may frequently be expected in space and astrophysical plasmas.</jats:p>