Excitation of Oxygen Ion Cyclotron Harmonic Waves in the Inner Magnetosphere: Hybrid Simulations

Liu，Kaijun1; Min，Kyungguk2; Feng，Bolu1; Wang，Yan1

2020-10-28

10.1029/2020GL090575

GEOPHYSICAL RESEARCH LETTERS   影响因子和分区

0094-8276

1944-8007

Hybrid simulations are carried out to investigate the excitation of oxygen ion cyclotron harmonic waves observed in the inner magnetosphere. The simulations show that these waves can be excited by energetic oxygen ions of a ring-like velocity distribution. The excited waves have properties consistent with observations, but their nearly perpendicular propagation disagrees with the quasi-parallel propagation from the singular value decomposition (SVD) analysis reported earlier. By performing the same SVD analysis on the simulated waves in a three-dimensional simulation, it is demonstrated that the superposition of multiple waves with different azimuthal angles can cause the commonly used SVD analysis of wave propagation to yield incorrectly small wave normal angles. In addition, the results show that the enhanced waves scatter oxygen ions mainly along v through cyclotron resonance. The waves may also scatter energetic radiation belt electrons through bounce resonance and transit time scattering, similar to fast magnetosonic waves.

electron scattering hybrid simulation ion Bernstein wave oxygen ion cyclotron harmonic wave singular value decomposition method

SCI ; EI

英语

第一 ; 通讯

Strategic Priority Research Program of Chinese Academy of Sciences[XDB 41000000] ; NSFC[41974168] ; Shenzhen Science and Technology Program[JCYJ20190809153407516]

Geology

Geosciences, Multidisciplinary

WOS:000586497000059

AMER GEOPHYSICAL UNION

20204409438279

Ions ; Electron scattering ; Cyclotrons ; Electron cyclotron resonance ; Harmonic analysis ; Oxygen ; Radiation belts ; Cyclotron radiation ; Singular value decomposition

Chemical Products Generally:804 ; Mathematics:921 ; Numerical Methods:921.6 ; Atomic and Molecular Physics:931.3 ; Particle Accelerators:932.1.1

GEOSCIENCES

2-s2.0-85094589352

Scopus

1.Department of Earth and Space Sciences,Southern University of Science and Technology,Shenzhen,China
2.Department of Astronomy and Space Science,Chungnam National University,Daejeon,South Korea

Liu，Kaijun,Min，Kyungguk,Feng，Bolu,et al. Excitation of Oxygen Ion Cyclotron Harmonic Waves in the Inner Magnetosphere: Hybrid Simulations[J]. GEOPHYSICAL RESEARCH LETTERS,2020,47(20).

Liu，Kaijun,Min，Kyungguk,Feng，Bolu,&Wang，Yan.(2020).Excitation of Oxygen Ion Cyclotron Harmonic Waves in the Inner Magnetosphere: Hybrid Simulations.GEOPHYSICAL RESEARCH LETTERS,47(20).

Liu，Kaijun,et al."Excitation of Oxygen Ion Cyclotron Harmonic Waves in the Inner Magnetosphere: Hybrid Simulations".GEOPHYSICAL RESEARCH LETTERS 47.20(2020).