太阳风中离子尺度相干电磁回旋波的观测特性及其驱动源诊断

有关电磁回旋波的研究一直是空间/行星际物理中的重要课题，而针对太阳风中离子尺度相干电磁回旋波的研究已成为近几年的研究热点。本项目拟在我们现有研究的基础上，结合 Wind、Cluster、及最新MMs卫星数据，开展（1）深入研究圆偏振相干电磁回旋波的等离子体特性及其能量驱动源；（2）探索线偏振相干电磁回旋波在太阳风中的存在性，并分析其与圆偏振电磁回旋波的异同；（3）探索上述相干电磁回旋波对太阳风粒子的影响，寻找相干电磁回旋波加热当地等离子体的观测信号。本项目将克服现有研究的局限性，采用更合理的技术方法，实现对太阳风中离子尺度相干电磁回旋波能量驱动源的准确诊断，提高人们对离子尺度相干电磁回旋波的认知水平，为未来研究相干电磁回旋波与太阳风湍流的联系乃至研究太阳风加热问题打下基础。

The study about electromagnetic cyclotron waves (ECWs) is an important topic in space/interplanetary physics, and the issue concerning coherent ECWs at ion scales in the solar wind obtains increasing interest in resent years. Based on our previous researches on this issue, this project plans to (1) investigate plasma characteristics for circularly polarized ECWs in depth, and diagnose their energy-driven sources based on theory and observation data; (2) explore whether there are linearly polarized ECWs in the solar wind, and compare their properties with those of circularly polarized ECWs; (3) explore the effect of coherent ECWs on solar wind particles, and find signatures of heating the solar wind through coherent ECWs. The present research shall overcome the limitations of existing studies, and obtain energy-driven sources of the ECWs based on reasonable technical methods. The research could improve our acknowledge for coherent electromagnetic cyclotron waves at ion scales in the solar wind, and should also be helpful to further discuss the relationship between coherent ECWs and the solar wind turbulence, as well as the issue on solar wind heating.