Ray Tracing Study of Electromagnetic Ion Cyclotron Waves Associated with Bi-Ion Frequencies  

作　　者：周庆华 杨昶 贺艺华 刘斯 周晓萍 唐立军 肖伏良 

机构地区：[1]School of Physics and Electronic Sciences, Changsha University of Science and Technology

出　　处：《Plasma Science and Technology》2014年第6期577-581,共5页等离子体科学和技术（英文版）

基　　金：supported by National Natural Science Foundation of China(Nos.40925014,41204114,and 41274165);the Aid Program for Scienceand Technology Innovative Research Team in Higher Educational Institutions of Hunan Province,China;the Construct Program of theKey Discipline in Hunan Province,China

摘　　要：Ray tracing study of electromagnetic ion cyclotron （EMIC） waves is conducted based on a realistic plasma density model. The simulation result shows that EMIC waves propagate away from the equatorial source region to higher latitudes basically along geomagnetic field lines, and are reflected at the region where their frequency matches the local bi-ion frequency. H＋ band suffers H＋-He＋ bi-ion frequency reflection at lower latitudes, whereas He＋ band suffers He＋-O＋ bi-ion frequency reflection at higher latitudes. Moreover, the concentration of heavy ions slightly affects the bi-ion frequencies and then slightly determines the reflection location of ray paths of EMIC waves. The current results present the first detailed study on the propagation characteristics of EMIC waves associated with bi-ion frequencies.Ray tracing study of electromagnetic ion cyclotron （EMIC） waves is conducted based on a realistic plasma density model. The simulation result shows that EMIC waves propagate away from the equatorial source region to higher latitudes basically along geomagnetic field lines, and are reflected at the region where their frequency matches the local bi-ion frequency. H＋ band suffers H＋-He＋ bi-ion frequency reflection at lower latitudes, whereas He＋ band suffers He＋-O＋ bi-ion frequency reflection at higher latitudes. Moreover, the concentration of heavy ions slightly affects the bi-ion frequencies and then slightly determines the reflection location of ray paths of EMIC waves. The current results present the first detailed study on the propagation characteristics of EMIC waves associated with bi-ion frequencies.

关 键 词：ray tracing electromagnetic ion cyclotron waves bi-ion frequency 

分 类 号：O53[理学—等离子体物理]