摘要
给出了部分电离束流-等离子体系统中频率低于离子回旋频率的低频束流波的色散关系,讨论了其不稳定性存在的条件。并且发现:当系统中的中性粒子与离子碰撞频繁时,中性粒子将转化为等离子体质元的一部分参与运动;而当碰撞频率远低于波频时,中性粒子的存在与否对低频束流波的传播及其不稳定性没有影响。
The dispersion relations of the waves with frequency less than the ion cyclo-tron frequency in a partially ionized stream-plasma system are obtained. The insta-bilities of all the waves and the role of the neutral particles are discussed in detail.It is demonstrated that when the neutral particles undergo strong collisions withthe ions, i. e. the collision frequency is greater than the wave frequency, they willbehave like charged particles, and when they undergo weak collisions, they willhave no influence upon the propagation or the instabilities of the low frequencywaves.
出处
《复旦学报（自然科学版）》
CAS
CSCD
北大核心
1990年第4期454-457,共4页
Journal of Fudan University：Natural Science
关键词
等离子体
流动
波
不稳定性
约束
plasma confinement
streams
plasma wave
plasma instability.
