Potential structure around the Cassini spacecraft near the orbit of Enceladus
Potential structure around the Cassini spacecraft near the orbit of Enceladus
复制标题
土卫二轨道附近卡西尼号航天器周围的潜在结构
DOI：
10.1063/1.3486523
复制
发表时间：
2010
影响因子：
2.2
通讯作者：
V. Yaroshenko
中科院分区：
文献类型：
--
作者：
J. Olson;W. Miloch;S. Ratynskaia;V. Yaroshenko
我们提出了对流动等离子体中物体周围潜在结构的数值模拟结果，以及与卡西尼号航天器穿过土卫二轨道附近的土星等离子体盘相关的参数。二维和三维细胞内粒子代码已被使用，允许模拟航天器主体通过其表面收集电荷来自洽地发展潜力。讨论了密度和电势分布对环境等离子体密度、电子温度和离子漂移速度的依赖性。将模拟中发现的航天器漂浮势值与卡西尼朗缪尔探测器特性分析推导出的值进行比较。
We present the results of numerical simulations of the potential structure around an object in a streaming plasma with parameters relevant for the Cassini spacecraft passing through Saturn's plasma disk near the orbit of Enceladus. Two- and three-dimensional particle-in-cell codes have been used allowing the potential of the simulated spacecraft body to develop self-consistently through the collection of charge by its surface. The dependence of the density and potential profiles on ambient plasma density, electron temperature, and ion drift speed is discussed. The spacecraft floating potential values, found in the simulations, are compared to those deduced from the analysis of Cassini Langmuir probe characteristics.