Aspect angle dependence of mean Doppler velocities of 1‐m auroral plasma waves
Aspect angle dependence of mean Doppler velocities of 1‐m auroral plasma waves
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DOI：
10.1029/ja091ia09p10173
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发表时间：
1986-09
影响因子：
--
通讯作者：
E. Nielsen
中科院分区：
文献类型：
--
作者：
E. Nielsen
本文测量了极光E区双流不稳定性激发的1米不稳定等离子体波的平均相速度随视角的变化。归一化函数与预测的相速度在不稳定性阈值处的变化一致。为了调和的观测与理论预测的功能关系的激发远远超过阈值，一个有效的电子碰撞频率6倍的电子中性碰撞频率是必需的。
The mean phase velocity of 1-m unstable plasma waves, excited by the two-stream instability in the auroral E region, has been measured as a function of aspect angle. The normalized function is consistent with the predicted variation of the phase velocity at threshold of the instability. To reconcile the observations with theoretical predictions of the functional relationship for excitation far beyond threshold, an effective electron collision frequency 6 times the electron-neutral collision frequency is required.