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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Simultaneous Cross-Energy Ion Response and Wave Generation After the Impact of an Interplanetary Shock
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Simultaneous Cross-Energy Ion Response and Wave Generation After the Impact of an Interplanetary Shock

机译：Simultaneous Cross-Energy Ion Response and Wave Generation After the Impact of an Interplanetary Shock

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Interplanetary (IP) shocks have substantial impact on particles and electromagnetic fields when arriving at the Earth's magnetosphere. In this study, we have examined the dynamics of cross-energy ions and plasma waves observed by Van Allen Probe B near the equator at the noon sector inside the geosynchronous orbit after the impact of an IP shock on 27 February 2014. We found that the Ultra-Low Frequency (ULF) and electromagnetic ion cyclotron (EMIC) waves are induced, and the differential fluxes of protons of various energies have different responses after the IP shock arrival. The perpendicular flux increased dramatically for low-energy ions (10–100 eV) due to the electric field drift and betatron acceleration. These adiabatic processes also accounted for the evident proton flux decrease at 30–80 keV energies and increase at energies higher than 100 keV, caused by the positive or negative gradient in phase space density before the IP shock arrival. The short-lived ULF waves triggered by the IP shock also interacted with the ~100 keV protons, resulting in the stripes in their pitch angle distribution. The anisotropic distribution of >50 keV protons excited EMIC waves after the shock arrival. This study provides a comprehensive picture of the IP shock effects on the ions of different energies and plasma waves inside the geosynchronous orbit, which shed new lights on the cross-energy responses of ions and plasma waves in the inner magnetosphere to solar wind discontinuities.
机译：星际(IP)冲击产生实质性的影响在粒子和电磁场到达地球的磁气圈。研究中,我们研究的动态cross-energy离子和等离子体波观测到范艾伦辐射探测器B在中午赤道附近部门内后的地球同步轨道于2014年2月27日IP冲击的影响。发现超低频(ULF)和电磁离子回旋波位的诱导,微分的质子通量各种能量有不同的反应IP冲击后到来。对低能离子通量急剧增加(10 - 100 eV)由于电场漂移电子感应加速器加速。也占了明显质子通量减少在30 - 80 keV能量和增加高于100 keV能量,造成的积极或消极的梯度相空间密度在IP冲击到来之前。短暂的ULF波IP引发的冲击也与~ 100 keV质子,导致螺旋角的条纹分布。keV质子兴奋后位的海浪冲击的到来。的照片的IP冲击对离子的影响不同的能量和内等离子体波地球同步轨道,新灯cross-energy反应的离子和等离子体波内磁气圈的太阳风不连续。

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