首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Chorus acceleration of radiation belt relativistic electrons during March 2013 geomagnetic storm
【24h】

Chorus acceleration of radiation belt relativistic electrons during March 2013 geomagnetic storm

机译:2013年3月地磁暴期间辐射带相对论电子的合唱加速

获取原文
获取原文并翻译 | 示例
           

摘要

The recent launching of Van Allen probes provides an unprecedent opportunity to investigate variations of the radiation belt relativistic electrons. During the 17–19 March 2013 storm, the Van Allen probes simultaneously detected strong chorus waves and substantial increases in fluxes of relativistic (2?4.5 MeV) electrons around L = 4.5. Chorus waves occurred within the lower band 0.1–0.5f_(ce) (the electron equatorial gyrofrequency), with a peak spectral density ~ 10~(?4) nT~2/Hz. Correspondingly, relativistic electron fluxes increased by a factor of 10~2–10~3 during the recovery phase compared to the main phase levels. By means of a Gaussian fit to the observed chorus spectra, the drift and bounce-averaged diffusion coefficients are calculated and then used to solve a 2-D Fokker-Planck diffusion equation. Numerical simulations demonstrate that the lower-band chorus waves indeed produce such huge enhancements in relativistic electron fluxes within 15 h, fitting well with the observation.
机译:Van Allen探针的最新推出为研究辐射带相对论电子的变化提供了前所未有的机会。在2013年3月17日至19日的暴风雨中,Van Allen探测器同时检测到强合唱波,并且相对论电子(2?4.5 MeV)的电子通量在L = 4.5附近显着增加。合唱波出现在电子赤道回旋频率0.1–0.5f_(ce)的较低频带内,峰值频谱密度约为10〜(?4)nT〜2 / Hz。相对地,相对论电子通量在恢复阶段与主相水平相比增加了10〜2–10〜3。通过对观察到的合唱谱进行高斯拟合,计算漂移和反弹平均扩散系数,然后将其用于求解二维Fokker-Planck扩散方程。数值模拟表明,低频带合唱波确实在15 h内产生了相对论电子通量的如此巨大的增强,与观测值非常吻合。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号