Electromagnetic cyclotron instabilities in bi-Kappa distributed plasmas: a quasilinear approach

M. Lazar, P.H. Yoon, B. Eliasson

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Abstract

Anisotropic bi-Kappa distributed plasmas, as encountered in the solar wind and planetary magnetospheres,are susceptible to a variety of kinetic instabilities including the cyclotron instabilities driven by an excess ofperpendicular temperature T⊥ > T∥ (where ∥, ⊥ denote directions relative to the mean magnetic field). Theseinstabilities have been extensively investigated in the past, mainly limiting to a linear stability analysis. Abouttheir quasilinear (weakly nonlinear) development some insights have been revealed by numerical simulationsusing PIC and Vlasov solvers. This paper presents a self-consistent analytical approach, which provides forboth the electron and proton cyclotron instabilities an extended picture of the quasilinear time evolution ofthe anisotropic temperatures as well as the wave energy densities. 
Original languageEnglish
Article number042110
Number of pages11
JournalPhysics of Plasmas
Volume24
Issue number4
DOIs
Publication statusPublished - 10 Apr 2017

Keywords

  • distributed plasmas
  • solar wind
  • magnetosphere

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