Random dust charge fluctuations in the near‐Enceladus plasma
Random dust charge fluctuations in the near‐Enceladus plasma
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土卫二附近等离子体中的随机尘埃电荷波动
DOI：
10.1002/2014ja020008
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
H. Lühr
中科院分区：
文献类型：
--
作者：
V. Yaroshenko;H. Lühr
随机尘埃电荷波动已经根据卡西尼号关于近土卫二等离子体环境的数据进行了研究。对波动时间尺度的估计表明，这一过程对从冰冷的卫星发出的颗粒可能很重要。分析模型预测，在土卫二尘埃等离子体中，大多数颗粒获得了波动的负电荷，但可能会出现少数带正电的粒子。这种效应的概率主要取决于尘埃/等离子体数密度的比值。我们的研究结果似乎得到了卡西尼等离子体光谱仪测量的带电颗粒分布在E3和E5羽飞。这些理论结果也可以为磁层内粒子动力学的复杂过程提供新的认识。
Stochastic dust charge fluctuations have been studied in the light of Cassini data on the near‐Enceladus plasma environment. Estimates of fluctuation time scales showed that this process can be of importance for the grains emanating from the icy moon. The analytical modeling predicts that in the dust‐loaded Enceladus plasma a majority of the grains acquires fluctuating negative charges, but there might appear a minority of positively charged particles. The probability of this effect mostly depends on the ratio of the dust/plasma number densities. Our findings appear to be supported by the available Cassini Plasma Spectrometer measurements of the charged grain distributions during E3 and E5 plume flybys. The theoretical results can also provide new insights into the intricate process of particle dynamics in the inner magnetosphere.
土卫二环面中的尘埃充电
DOI：
10.1002/2013ja019213
发表时间：
2014
期刊：
Journal of Geophysical Research: Space Physics
影响因子：
--
作者：
Yaroshenko;Miloch
通讯作者：
Miloch