Ion acoustic mode in permeating plasmas

15th International Congress on Plasma Physics; 13th Latin American Workshop on Plasma Physics

Vranjes, J.^1 ; Poedts, S.^1

Center for Plasma Astrophysics, Leuven Mathematical Modeling and Computational Science Research Centre (LMCC), Celestijnenlaan 200B, 3001 Leuven, Belgium^1

关键词: Acoustic speed;    Electron drift;    Electron ion plasma;    Ion-acoustic modes;    Kinetic instability;    Static plasma;    Threshold velocity;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/511/1/012010/pdf
DOI  :  10.1088/1742-6596/511/1/012010

来源: IOP

【 摘 要 】

In the presence of an electron drift relative to 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 is very different in the case of one quasi-neutral electron-ion plasma propagating through another quasi-neutral (target) plasma. The threshold velocity of the propagating plasma may be well below the ion acoustic speed of the static plasma.