Interaction dynamics of electrostatic solitary waves
Interaction dynamics of electrostatic solitary waves
复制标题
静电孤立波的相互作用动力学
DOI：
10.5194/npg-6-205-1999
复制
发表时间：
1999
期刊：
影响因子：
--
通讯作者：
Y. Omura
中科院分区：
文献类型：
--
作者：
V. L. Krasovsky;H. Matsumoto;Y. Omura
研究了无碰撞等离子体中非线性静电脉冲与电子相位密度空穴的相互作用。从两个静电孤立波系统的能量平衡出发，分析了相互作用的一个基本事件。它建立了系统的一个固有属性是一个特定的不可逆性所造成的非绝热修改的内部结构的孔和它们的有效加热的过程中的相互作用。这种动力学不可逆性与包含空穴的被捕获电子的相位混合以及在变化的自洽势威尔斯中的振荡密切相关。由于不可逆性，孤立波的“碰撞”应被视为“非弹性”的。这就解释了在数值模拟中经常观察到的相密度洞的合并和相应的孤立波耦合的一般趋势。
Interaction of nonlinear electrostatic pulses associated with electron phase density holes moving in a collisionless plasma is studied. An elementary event of the interaction is analyzed on the basis of the energy balance in the system consisting of two electrostatic solitary waves. It is established that an intrinsic property of the system is a specific irreversibility caused by a nonadiabatic modification of the internal structure of the holes and their effective heating in the process of the interaction. This dynamical irreversibility is closely connected with phase mixing of the trapped electrons comprising the holes and oscillating in the varying self-consistent potential wells. As a consequence of the irreversibility, the "collisions" of the solitary waves should be treated as "inelastic" ones. This explains the general tendency to the merging of the phase density holes frequently observed in numerical simulation and to corresponding coupling of the solitary waves.