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Momentum transfer in the combined release and radiation effects satellite plasma injection experiments: The role of parallel electric fields

机译:动量传递在卫星等离子体注入和释放的联合作用中的作用:平行电场的作用

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Optical observations of the combined release and radiation effects satellite (CRRES) plasma injection experiments have revealed signatures of the coupling processes between the injected and ambient plasmas. The elongation of the ion cloud along the geomagnetic field indicated the presence of parallel electric fields. A dense core of ions polarized and ExB drifted along the satellite trajectory for 6-10 s. In an effort to understand the momentum coupling between the two plasma populations, a three-dimensional hybrid code is used. The simulation, which neglected electron inertia, showed a very efficient transfer of momentum via Alfven waves and the skidding ion core was stopped within 2 s. To reconcile the difference between the observed and simulated skidding times, we propose that the cloud must have been decoupled from the ambient plasma via parallel electric fields. The parallel fields may be associated with inertial Alfven waves propagating in filamentary current layers at the edges of the ion cloud, or due to a variety of possible plasma instabilities. The results of this study can be applied to coupling processes in other geophysical and astrophysical systems such as cometary environments, Io's plasma torus, and the auroral regions of the ionosphere and magnetosphere. (C) 2000 American Institute of Physics. [S1070-664X(00)03209-2]. [References: 26]
机译:组合的释放和辐射效应卫星(CRRES)等离子体注入实验的光学观察揭示了注入的等离子体与周围等离子体之间的耦合过程。离子云沿地磁场的伸长表明存在平行电场。密集的离子极化和ExB核沿卫星轨迹漂移了6-10 s。为了理解两个血浆群体之间的动量耦合,使用了三维混合代码。忽略了电子惯性的模拟显示,通过Alfven波非常有效地传递了动量,并且滑移离子核在2 s内停止。为了调和观测的滑坡时间与模拟的滑坡时间之间的差异,我们建议必须通过并行电场将云与周围的等离子解耦。平行场可能与在离子云边缘的丝状电流层中传播的惯性Alfven波有关,或者是由于各种可能的等离子体不稳定性所致。这项研究的结果可以应用于其他地球物理和天体系统中的耦合过程,例如彗星环境,艾奥的等离子体圆环以及电离层和磁层的极光区域。 (C)2000美国物理研究所。 [S1070-664X(00)03209-2]。 [参考:26]

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