Generation of rising‐tone chorus in a two‐dimensional mirror field by using the general curvilinear PIC code

DOI Web Site Web Site 被引用文献5件
  • Yangguang Ke
    CAS Key Laboratory of Geospace Environment, Department of Geophysics and Planetary Science University of Science and Technology of China Hefei China
  • Xinliang Gao
    CAS Key Laboratory of Geospace Environment, Department of Geophysics and Planetary Science University of Science and Technology of China Hefei China
  • Quanming Lu
    CAS Key Laboratory of Geospace Environment, Department of Geophysics and Planetary Science University of Science and Technology of China Hefei China
  • Xueyi Wang
    Physics Department Auburn University Auburn Alabama USA
  • Shui Wang
    CAS Key Laboratory of Geospace Environment, Department of Geophysics and Planetary Science University of Science and Technology of China Hefei China

書誌事項

公開日
2017-08
権利情報
  • http://onlinelibrary.wiley.com/termsAndConditions#vor
DOI
  • 10.1002/2017ja024178
公開者
American Geophysical Union (AGU)

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説明

<jats:title>Abstract</jats:title><jats:p>Recently, the generation of rising‐tone chorus has been implemented with one‐dimensional (1‐D) particle‐in‐cell (PIC) simulations in an inhomogeneous background magnetic field, where both the propagation of waves and motion of electrons are simply forced to be parallel to the background magnetic field. In this paper, we have developed a two‐dimensional (2‐D) general curvilinear PIC simulation code and successfully reproduced rising‐tone chorus waves excited from an anisotropic electron distribution in a 2‐D mirror field. Our simulation results show that whistler waves are mainly generated around the magnetic equator and continuously gain growth during their propagation toward higher‐latitude regions. The rising‐tone chorus waves are observed off the magnetic equator, which propagate quasi‐parallel to the background magnetic field with the wave normal angle smaller than 25°. Due to the propagating effect, the wave normal angle of chorus waves is increasing during their propagation toward higher‐latitude regions along an enough curved field line. The chirping rate of chorus waves is found to be larger along a field line with a smaller curvature.</jats:p>

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