Two Dimensional Simulation of Amplitude Modulated Electron Plasma Waves

Zhou Meng; Deng Xiaohua; Y. Pang; S. Y. Li; R. X. Tang; J.F. Wang; Z.G. Yuan

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Two Dimensional Simulation of Amplitude Modulated Electron Plasma Waves

Zhou Meng #,Deng Xiaohua *,Y. Pang,S. Y. Li,R. X. Tang,J.F. Wang,Z.G. Yuan

School of Electronic and Information, Wuhan University

*Correspondence author

#Submitted by

Subject:

Funding: the National Changjiang Scholarship Project at Wuhan University，National Science Foundation of China，the Outstanding Young Scientist Founding of China（No.40390151, 40574073, 40574074，40325012）

Opened online:19 December 2007

Accepted by: none

Citation: Zhou Meng,Deng Xiaohua,Y. Pang.Two Dimensional Simulation of Amplitude Modulated Electron Plasma Waves[OL]. [19 December 2007] http://en.paper.edu.cn/en_releasepaper/content/17123

Highly modulated waves near electron plasma frequency with both parallel and perpendicular polarization have been observed near diffusion region at dayside and in the tail region. In this paper, two dimensional Particle-In-Cell (PIC) simulation was performed to study the possible generation mechanism of these modulated electron plasma waves. It is shown that weak beam instability could generate the modulated Langmuir wave and the ambient magnetic field plays an important role in the formation of modulation. When the weak beam has loss cone distribution, highly modulated upper hybrid waves are generated and propagate with large angle to the ambient magnetic field. The properties of these modulated waves are discussed and compared with observations.

Keywords:PIC simulation, amplitude modulated wave, Langmuir wave, upper hybrid wave

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