Inner Magnetospheric Magnetic Dips and Energetic Protons Trapped Therein: Multi-Spacecraft Observations and Simulations
Inner Magnetospheric Magnetic Dips and Energetic Protons Trapped Therein: Multi-Spacecraft Observations and Simulations
复制标题
内部磁层磁倾角和俘获其中的高能质子：多航天器观测和模拟
DOI：
10.1029/2021gl092567
复制
发表时间：
2021
影响因子：
5.2
通讯作者：
Fu Sui-Yan
中科院分区：
文献类型：
--
作者：
Yin Ze-Fan;Zhou Xu-Zhi;Zong Qiu-Gang;Liu Zhi-Yang;Yue Chao;Xiong Ying;Xie Lun;Wang Yong-Fu;Fu Sui-Yan
Localized magnetic field depressions in the inner magnetosphere, known as magnetic dips, are produced by the diamagnetic motion of energetic ions injected via substorm activities. The magnetic dips, if deep enough, can produce a local minimum in the radial profile of the field strength to trap the injected protons. Therefore, the trapped protons would drift at the same speed as the dip propagation, which leads to the simultaneous enhancements of proton fluxes in multiple energy channels at the leading edge of the dip structure. On the trailing side, the reduction of proton fluxes shows dispersive features, which can be attributed to the energy‐dependent drift motion of the injected protons in the absence of the local field minimum. This scenario is examined based on comparisons between multi‐spacecraft observations and test‐particle simulations, and their good agreement validates the scenario to shed new light on the dynamics of the inner magnetosphere‐magnetotail coupled system.
