Thermal electron acceleration by localized bursts of electric field in the radiation belts
Thermal electron acceleration by localized bursts of electric field in the radiation belts
复制标题
辐射带中局部电场爆发的热电子加速
DOI：
10.1002/2014gl061248
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发表时间：
2014
影响因子：
5.2
通讯作者：
V. Krasnoselskikh
中科院分区：
文献类型：
--
作者：
A. Artemyev;O. Agapitov;F. Mozer;V. Krasnoselskikh
在本文中，我们研究的共振相互作用的热电子10-100电子伏特的静电场，导致电子加速到千伏能量的突发。这个单一的爆发包含一个符号的大的平行电场和一个符号相反的小得多、持续时间更长的平行电场。货车艾伦探测器航天器经常观测地球外辐射带中空间局部爆发的集群。这些结构大多远离地磁赤道传播，并具有类似孤立子的非线性电子声波的特性：传播速度约为冷电子的热速度（约3000- 10，000 km/s），电场局部化的空间尺度沿着场线约为热电子的德拜半径（约50 -30 km）。我们模拟这些电场结构和冷背景电子的非线性共振相互作用。
In this paper we investigate the resonant interaction of thermal ∼10–100 eV electrons with a burst of electrostatic field that results in electron acceleration to kilovolt energies. This single burst contains a large parallel electric field of one sign and a much smaller, longer‐lasting parallel field of the opposite sign. The Van Allen Probe spacecraft often observes clusters of spatially localized bursts in the Earth's outer radiation belts. These structures propagate mostly away from the geomagnetic equator and share properties of soliton‐like nonlinear electron acoustic waves: a velocity of propagation is about the thermal velocity of cold electrons (∼3000–10,000 km/s), and a spatial scale of electric field localization along the field lines is about the Debye radius of hot electrons (∼5–30 km). We model the nonlinear resonant interaction of these electric field structures and cold background electrons.