Particle-in-Cell Simulation of Electron Cyclotron Harmonic Waves Driven by a Loss Cone Distribution

Wu，Yifan1,2,3; Tao，Xin1,2,3; Liu，Xu4; Chen，Lunjin4; Xie，Huasheng5,6; Liu，Kaijun7; Horne，Richard, B.8

2020-05-16

10.1029/2020GL087649

GEOPHYSICAL RESEARCH LETTERS   影响因子和分区

0094-8276

1944-8007

Electron Cyclotron Harmonic (ECH) waves driven by a loss cone distribution are studied in this work by self-consistent particle-in-cell simulations. These waves have been suggested to play an important role in diffuse auroral precipitation in the outer magnetosphere. However, particle simulation of this instability is difficult because the saturation amplitude of the wave driven by a realistic size loss cone distribution is very small. In this work we use an extraordinarily large number of particles to reduce simulation noise so that the growth and saturation of ECH waves can be investigated. Our simulation results are consistent with linear theory in terms of growth rate, and with observation in terms of wave amplitude. We demonstrate that the heating of cold electrons is negligible and nonresonant, different from previous conclusions, and suggest that the saturation of the wave is caused by the filling of the loss cone of hot electrons.

ECH waves electrostatic wave loss cone distribution magnetosphere PIC simulation

SCI ; EI

英语

其他

NSFC[41674174][41631071][41474142][41974168] ; B-type Strategic Priority Program of the Chinese Academy of Sciences[XDB41000000] ; UK National Environment Research Council Highlight Topic Grant[NE/P10738X/1]

Geology

Geosciences, Multidisciplinary

WOS:000536639500009

AMER GEOPHYSICAL UNION

20202008654805

Electron beams ; Magnetosphere ; Plasma simulation ; Growth rate ; Cyclotrons ; Hot electrons

Atmospheric Properties:443.1 ; Electricity: Basic Concepts and Phenomena:701.1 ; Magnetism: Basic Concepts and Phenomena:701.2 ; Particle Accelerators:932.1.1 ; Plasma Physics:932.3

GEOSCIENCES

2-s2.0-85084506959

Scopus

1.CAS Key Laboratory of Geospace Environment,Department of Geophysics and Planetary Sciences,University of Science and Technology of China,Hefei,China
2.CAS Center for Excellence in Comparative Planetology,Hefei,China
3.Anhui Mengcheng Geophysics National Observation and Research Station,Mengcheng,China
4.Department of Physics,University of Texas at Dallas,Dallas,United States
5.Hebei Key Laboratory of Compact Fusion,Langfang,China
6.ENN Science and Technology Development Co.,Ltd.,Langfang,China
7.Department of Earth and Space Sciences,Southern University of Science and Technology,Shenzhen,China
8.British Antarctic Survey,Cambridge,United Kingdom

Wu，Yifan,Tao，Xin,Liu，Xu,et al. Particle-in-Cell Simulation of Electron Cyclotron Harmonic Waves Driven by a Loss Cone Distribution[J]. GEOPHYSICAL RESEARCH LETTERS,2020,47(9).

Wu，Yifan.,Tao，Xin.,Liu，Xu.,Chen，Lunjin.,Xie，Huasheng.,...&Horne，Richard, B..(2020).Particle-in-Cell Simulation of Electron Cyclotron Harmonic Waves Driven by a Loss Cone Distribution.GEOPHYSICAL RESEARCH LETTERS,47(9).

Wu，Yifan,et al."Particle-in-Cell Simulation of Electron Cyclotron Harmonic Waves Driven by a Loss Cone Distribution".GEOPHYSICAL RESEARCH LETTERS 47.9(2020).