Direct Observation of Acceleration and Thermalization of Beam Electrons Caused by Double Layers in the Earth's Plasma Sheet
Direct Observation of Acceleration and Thermalization of Beam Electrons Caused by Double Layers in the Earth's Plasma Sheet
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直接观测地球等离子体片双层引起的束流电子的加速和热化
DOI：
10.1029/2022gl099483
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发表时间：
2022-06
影响因子：
5.2
通讯作者：
Shiyong Huang
中科院分区：
文献类型：
--
作者：
Zhigang Yuan;Yue Dong;Shiyong Huang;Zuxiang Xue;Shiyong Huang
我们报告了对地球磁尾等离子体层中电子束加速和热化的详细过程的直接观察。通过四颗磁层多尺度（MMS）卫星的观测，发现双层结构的势能与通过双层结构的束流电子的平均平行能量的增强基本一致，表明双层结构对束流电子有加速作用。随后，同时观察到德拜尺度平行电场湍流和平行温度的升高，表明静电平行湍流使束流电子热化。这些观测结果表明，DL是控制地球磁尾等离子体层中束流电子加速和热化的关键过程。
We report direct observations of the detailed processes for the acceleration and thermalization of beam electrons in the plasma sheet of the Earth’s magnetotail. With observations from the four Magnetospheric Multiscale (MMS) satellites, the potential of a double layer (DL) structure is found to be mostly consistent with enhancements of the averaged parallel energy of the beam electrons passing through the DL structure, demonstrating that beam electrons are accelerated by the DL structure. Thereafter, Debye-scale parallel electric field turbulence and an increase of the parallel temperature are simultaneously observed, implying that electrostatic parallel turbulence thermalizes beam electrons. These observations imply that the DL is a key process controlling the acceleration and thermalization of beam electrons in the plasma sheet of the Earth’s magnetotail.
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影响因子：
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作者：
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通讯作者：
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影响因子：
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KRUSKAL, MD
影响因子：
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