Prompt striations in ionospheric barium clouds due to a velocity space instability
Prompt striations in ionospheric barium clouds due to a velocity space instability
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DOI：
10.1029/ja085ia02p00671
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发表时间：
1980-02
影响因子：
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通讯作者：
D. Simons;M. Pongratz;S. Gary
中科院分区：
文献类型：
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作者：
D. Simons;M. Pongratz;S. Gary
本文发展了漂移损失锥型静电不稳定性的线性理论，适用于布阿罗形电荷钡注入实验的速度分布。数值求解了弗拉索夫等离子体中不稳定性的色散关系。结果表明，低频不稳定性，我们解释为在Buaro和回旋不稳定性，似乎对应于所观察到的离子回旋波动观察到的提示条纹的来源。这些不稳定性比流体理论的漂移不稳定性有更快的增长率，因此提供了更好的描述。
The linear theory of electrostatic instabilities of the drift loss-cone type has been developed for a velocity distribution appropriate to the shaped-charge barium injection experiment Buaro. The dispersion relation for the instability in a Vlasov plasma has been solved numerically. The results show a low-frequency instability that we interpret as the source of prompt striations observed in Buaro and cyclotron instabilities that appear to correspond to observed ion cyclotron fluctuations. These instabilities have much faster growth rates than drift instabilities of fluid theories and therefore provide a better description of the observations.