Kourakis I, Shukla P K
Institut für Theoretische Physik IV, Fakultät für Physik und Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany.
Phys Rev E Stat Nonlin Soft Matter Phys. 2004 Mar;69(3 Pt 2):036411. doi: 10.1103/PhysRevE.69.036411. Epub 2004 Mar 31.
Theoretical and numerical studies are presented of the amplitude modulation of electron-acoustic waves (EAWs) propagating in space plasmas whose constituents are inertial cold electrons, Boltzmann distributed hot electrons, and stationary ions. Perturbations oblique to the carrier EAW propagation direction have been considered. The stability analysis, based on a nonlinear Schrödinger equation, reveals that the EAW may become unstable; the stability criteria depend on the angle theta between the modulation and propagation directions. Different types of localized EA excitations are shown to exist.
本文给出了在由惯性冷电子、玻尔兹曼分布的热电子和静止离子组成的空间等离子体中传播的电子声波（EAWs）幅度调制的理论和数值研究。考虑了与载波EAW传播方向倾斜的扰动。基于非线性薛定谔方程的稳定性分析表明，EAW可能变得不稳定；稳定性判据取决于调制方向和传播方向之间的夹角θ。结果表明存在不同类型的局域EA激发。
