The influence of various frequency chorus waves on electron dynamics in radiation belts  

作　　者：HE JiaBei JIN Yu Yue XIAO FuLiang HE ZhaoGuo YANG Chang XIE YanQiong HE Qian WANG ChengZhi SHANG XiongJun LIU Si ZHOU QingHua ZHANG Sai 

机构地区：[1]School of Physics and Electronic Sciences,Changsha University of Science and Technology,Changsha 410114,China [2]CAS Key Laboratory of Geospace Environment,University of Science and Technology of China,Hefei 230026,China [3]Planetary Environmental and Astrobiological Research L aboratory(PEARL).School of Atmospheric Sciences,Sun Yat-sen University,Zhuhai 519082,China [4]College of Meteorology and Oceanography,National University of Defense Technology,Nanjing 211101,China

出　　处：《Science China(Technological Sciences)》2021年第4期890-897,共8页中国科学（技术科学英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.41531072,41974212,41774194,42074198 and42004141);the Hunan Provincial Natural Science Foundation of China(Grant No.2018JJ2425);the Foundation of Education Bureau of Hunan Province for Distinguished Young Scientists(Grant No.20B004);the Specialized Research Fund for CAS Key Laboratories。

摘　　要：Non-adiabatic behaviour induced by the chorus-electron interaction is an important contributor to the radiation belt dynamics,and largely relies on wave frequency distribution.During the geomagnetic storm on August 2,2016,upper-band,lower-band and extremely low frequency(ELF)chorus waves were simultaneously observed within one orbit period of the Van Allen Probe B.Numerical simulations are performed to investigate the electron evolution by the observed chorus with different frequencies.The results show that various frequency chorus waves have different effects on electron dynamics.For chorus in the range f≈0.3 fce–0.7 fce,energy diffusion is the dominant process in electron evolutions.For chorus in the range 0.1 fce≤f≤0.25 fce,the pitch angle diffusion tends to be comparable to energy diffusion for Ek>0.5 MeV.For ELF chorus below 0.1 fce,the pitch angle diffusion rate is much above the energy diffusion rate,leading to potential scattering losses.

关 键 词：various frequency chorus relativistic electrons radiation belts numerical simulation 

分 类 号：P353.4[天文地球—空间物理学]