Electron velocity space hole modes and narrowband electrostatic noise in the distant tail
Electron velocity space hole modes and narrowband electrostatic noise in the distant tail
复制标题
远尾中的电子速度空穴模式和窄带静电噪声
DOI：
10.1029/gl016i007p00747
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发表时间：
1989
影响因子：
5.2
通讯作者：
M. Ashour‐Abdalla
中科院分区：
文献类型：
--
作者：
F. Coroniti;M. Ashour‐Abdalla
窄带静电噪声（NEN）在远尾慢激波上游经常被观测到。认为NEN是一种由低能电子速度分布中的空穴引起的非标准等离子体波模式。提出了一个非常简单的模型，该模型合理地说明了电子与慢激波的相互作用如何形成空穴。平行电子分布中的正斜率和/或从慢激波上游逃逸的弱高能离子束使空穴模式不稳定。
Narrowband electrostatic noise (NEN) is frequently observed upstream of the slow shocks in the distant tail. It is suggested that NEN represents a nonstandard plasma wave mode which results from a hole in the low energy electron velocity distribution. A very simple model which plausibly indicates how a hole might be formed by the interaction of the electrons with the slow shock is presented. The hole mode is destabilized by a positive slope in the parallel electron distribution and/or by a weak beam of energetic ions which escape upstream from the slow shock.