Responses of geostationary orbit energetic electron fluxes to chorus waves under different geomagnetic conditions

作     者：ZHOU XiaoPing XIAO FuLiang HE YiHua YANG Chang ZHOU QingHua 

作者机构：ZHANG ZeLongGAO ZhongLei & DING YuanHui School of Physics and Electronic SciencesChangsha University of Science and Technology 

出 版 物：《Science China Earth Sciences》 (中国科学（地球科学英文版）)

年 卷 期：2013年第56卷第11期

页      面：2006-2014页

核心收录：

学科分类：070802[理学-空间物理学] 07[理学] 0708[理学-地球物理学] 0704[理学-天文学] 

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.40925014&41274165) Aid Program for Science and Technology Innovative Research Team in Higher Educational Institutions of Hunan Province the Construct Program of the Key Discipline inHunan Province 

主　　题：energetic electron flux chorus waves wave-particle interaction geomagnetic condition 

摘      要：We investigate the flux evolution of geostationary orbit energetic electrons during a strong storm on 24 August 2005(event A,the storm index Dst50 nT,average AE=320 nT).Data collected by LANL and GOES-12 satellites show that energetic electron fluxes increase by a factor of 10 during the recovery phase compared to the prestorm level for both events A and *** the substorm continued,the Cluster C4 satellite observed strong whistler-mode chorus waves(with spectral density approaching 10 5nT2/Hz).The wave amplitude correlates with the substorm AE index,but is less correlated with the storm Dst *** a Gaussian distribution fitting method,we solve the Fokker-Planck diffusion equation governing the wave-particle *** results demonstrate that chorus waves efficiently accelerate^1 MeV energetic electrons,particularly at high pitch *** calculated acceleration time scale and amplitude are comparable to *** results provide new observational support for chorus-driven acceleration of radiation belt energetic electrons.