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Title: 3D electrostatic gyrokinetic electron and fully kinetic ion simulation of lower-hybrid drift instability of Harris current sheet

Abstract

The eigenmode stability properties of three-dimensional lower-hybrid-drift-instabilities (LHDI) in a Harris current sheet with a small but finite guide magnetic field have been systematically studied by employing the gyrokinetic electron and fully kinetic ion (GeFi) particle-in-cell (PIC) simulation model with a realistic ion-to-electron mass ratio m i/m e. In contrast to the fully kinetic PIC simulation scheme, the fast electron cyclotron motion and plasma oscillations are systematically removed in the GeFi model, and hence one can employ the realistic m i/m e. The GeFi simulations are benchmarked against and show excellent agreement with both the fully kinetic PIC simulation and the analytical eigenmode theory. Our studies indicate that, for small wavenumbers, ky, along the current direction, the most unstable eigenmodes are peaked at the location where $$\vec{k}$$• $$\vec{B}$$ =0, consistent with previous analytical and simulation studies. Here, $$\vec{B}$$ is the equilibrium magnetic field and $$\vec{k}$$ is the wavevector perpendicular to the nonuniformity direction. As ky increases, however, the most unstable eigenmodes are found to be peaked at $$\vec{k}$$ •$$\vec{B}$$ ≠0. Additionally, the simulation results indicate that varying m i/m e, the current sheet width, and the guide magnetic field can affect the stability of LHDI. Simulations with the varying mass ratio confirm the lower hybrid frequency and wave number scalings.

Authors:
 [1];  [1];  [1];  [2];  [3]
  1. Auburn Univ., AL (United States). Dept. of Physics
  2. Univ. of California, Irvine, CA (United States). Dept. of Physics and Astronomy; Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  3. Univ. of California, Irvine, CA (United States). Dept. of Physics and Astronomy; Zhejiang Univ., Hangzhou (China). Institute for Fusion Theory and Simulation
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1305900
Alternate Identifier(s):
OSTI ID: 1260992
Report Number(s):
LLNL-JRNL-698885
Journal ID: ISSN 1070-664X; PHPAEN
Grant/Contract Number:  
AC52-07NA27344; SC0010486
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 23; Journal Issue: 7; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION; normal modes; magnetic fields; electrostatics; magnetic reconnection; particle-in-cell method

Citation Formats

Wang, Zhenyu, Lin, Yu, Wang, Xueyi, Tummel, Kurt, and Chen, Liu. 3D electrostatic gyrokinetic electron and fully kinetic ion simulation of lower-hybrid drift instability of Harris current sheet. United States: N. p., 2016. Web. doi:10.1063/1.4954830.
Wang, Zhenyu, Lin, Yu, Wang, Xueyi, Tummel, Kurt, & Chen, Liu. 3D electrostatic gyrokinetic electron and fully kinetic ion simulation of lower-hybrid drift instability of Harris current sheet. United States. doi:10.1063/1.4954830.
Wang, Zhenyu, Lin, Yu, Wang, Xueyi, Tummel, Kurt, and Chen, Liu. Thu . "3D electrostatic gyrokinetic electron and fully kinetic ion simulation of lower-hybrid drift instability of Harris current sheet". United States. doi:10.1063/1.4954830. https://www.osti.gov/servlets/purl/1305900.
@article{osti_1305900,
title = {3D electrostatic gyrokinetic electron and fully kinetic ion simulation of lower-hybrid drift instability of Harris current sheet},
author = {Wang, Zhenyu and Lin, Yu and Wang, Xueyi and Tummel, Kurt and Chen, Liu},
abstractNote = {The eigenmode stability properties of three-dimensional lower-hybrid-drift-instabilities (LHDI) in a Harris current sheet with a small but finite guide magnetic field have been systematically studied by employing the gyrokinetic electron and fully kinetic ion (GeFi) particle-in-cell (PIC) simulation model with a realistic ion-to-electron mass ratio mi/me. In contrast to the fully kinetic PIC simulation scheme, the fast electron cyclotron motion and plasma oscillations are systematically removed in the GeFi model, and hence one can employ the realistic mi/me. The GeFi simulations are benchmarked against and show excellent agreement with both the fully kinetic PIC simulation and the analytical eigenmode theory. Our studies indicate that, for small wavenumbers, ky, along the current direction, the most unstable eigenmodes are peaked at the location where $\vec{k}$• $\vec{B}$ =0, consistent with previous analytical and simulation studies. Here, $\vec{B}$ is the equilibrium magnetic field and $\vec{k}$ is the wavevector perpendicular to the nonuniformity direction. As ky increases, however, the most unstable eigenmodes are found to be peaked at $\vec{k}$ •$\vec{B}$ ≠0. Additionally, the simulation results indicate that varying mi/me, the current sheet width, and the guide magnetic field can affect the stability of LHDI. Simulations with the varying mass ratio confirm the lower hybrid frequency and wave number scalings.},
doi = {10.1063/1.4954830},
journal = {Physics of Plasmas},
number = 7,
volume = 23,
place = {United States},
year = {Thu Jul 07 00:00:00 EDT 2016},
month = {Thu Jul 07 00:00:00 EDT 2016}
}

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