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Energetic ion dynamics in Jupiter's plasma sheet

机译:木星等离子体片中的高能离子动力学

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摘要

A systematic study of energetic ion trajectories in Jupiter's plasma sheet region predicts a significant role for both regular and stochastic types of motion and reveals several aspects of the ion dynamics that aid in the interpretation of Galileo observations. The motion is generally confined to the vicinity of the current sheet in a way that is proportional to the variable current sheet thickness as seen in the particle and field data. The radial extent of the trajectories increases with rigidity and initial radial distance from the planet, explaining the corresponding lack of high-rigidity ions and decreasing radial gradients at lower rigidity. Ion intensity increases associated with changes in current sheet thickness suggest an acceleration region at ∼25 to 30 R_J. Energy dispersion in ion events at larger radial distances can be explained by such a source combined with elastic ion scattering.
机译:对木星等离子片区域中高能离子轨迹的系统研究预测了规则运动和随机运动的重要作用,并揭示了有助于解释伽利略观测的离子动力学的几个方面。通常以与粒子和场数据中所见的可变电流板厚度成比例的方式将运动限制在电流板附近。轨迹的径向范围随刚度和与行星的初始径向距离而增加,这解释了相应的缺乏高刚度离子和在较低刚度时径向梯度减小的情况。离子强度的增加与当前薄板厚度的变化有关,表明在约25至30 R_J处有一个加速区域。离子事件中在较大径向距离处的能量分散可以通过这种源与弹性离子散射结合来解释。

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