离子声孤子在不均匀等离子体中的传播特性

THE PROPAGATION PROPERTY OF ION-ACOUSTIC SOLITON IN AN INHOMOGENEOUS PLASMA

本文考虑了离子的有限温度和离子与中性分子的碰撞,讨论离子声孤子在电离导致的弱不均匀等离子体中的传播特性,得到自洽的非均匀浓度分布N(x),漂移速度分布V(x)和相应的孤子解,数值计算给出孤子幅度、速度、宽度随位置的变化,所得结果合理并与实验相符。

The propagation property of ion-acoustic soliton in a weakly inhomogeneous plasma caused by ionization is studied. Finite ion temperature and ion-neutral collisions are considered the self consistent, stationary distribution N(x), V(x) and the corresponding soliton solution are obtained, numerical results of soliton amplitude, speed and width dependent on position are given, which are reasonable and consistent with experiments.