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Title: Turbulence in Three-Dimensional Simulations of Magnetopause Reconnection: TURBULENCE DURING 3-D RECONNECTION

Abstract

We present detailed analysis of the turbulence observed in three-dimensional particle-in- cell simulations of magnetic reconnection at the magnetopause. The parameters are representative of anelectron diffusion region encounter of the Magnetospheric Multiscale (MMS) mission. The turbulence is found to develop around both the magnetic X line and separatrices, is electromagnetic in nature, is characterized by a wave vector k given by kρ e~(m eT e/m iT i) 0.25 with ρ e the electron Larmor radius, and appears to have the ion pressure gradient as its source of free energy. Taken together, these results suggest the instability is a variant of the lower hybrid drift instability. The turbulence produces electric field fluctuations in the out-of-plane direction (the direction of the reconnection electric field) with an amplitude of around ±10 mV/m, which is much greater than the reconnection electric field of around 0.1 mV/m. Such large values of the out-of-plane electric field have been identified in the MMS data. The turbulence in the simulations controls the scale lengths of the density profile and current layers in asymmetric reconnection,driving them closer to $$ \sqrt{} $$ρ eρ i than the ρ e or d e scalings seen in 2-D reconnection simulations, and produces significant anomalous resistivity and viscosit y in the electron diffusion region.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [4]; ORCiD logo [5]
  1. Univ. of Maryland, College Park, MD (United States)
  2. Univ. of Maryland, College Park, MD (United States). Dept. of Physics, the Inst. for Physical Science and Technology, and the Joint Space Science Inst.
  3. Southwest Research Inst. (SwRI), San Antonio, TX (United States)
  4. West Virginia Univ., Morgantown, WV (United States). Dept. of Physics and Astronomy
  5. Univ. of Colorado, Boulder, CO (United States). Dept. of Astrophysical and Planetary Sciences
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
Sponsoring Org.:
USDOE
OSTI Identifier:
1461528
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Geophysical Research. Space Physics
Additional Journal Information:
Journal Volume: 122; Journal Issue: 11; Journal ID: ISSN 2169-9380
Publisher:
American Geophysical Union
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS

Citation Formats

Price, L., Swisdak, M., Drake, J. F., Burch, J. L., Cassak, P. A., and Ergun, R. E. Turbulence in Three-Dimensional Simulations of Magnetopause Reconnection: TURBULENCE DURING 3-D RECONNECTION. United States: N. p., 2017. Web. doi:10.1002/2017JA024227.
Price, L., Swisdak, M., Drake, J. F., Burch, J. L., Cassak, P. A., & Ergun, R. E. Turbulence in Three-Dimensional Simulations of Magnetopause Reconnection: TURBULENCE DURING 3-D RECONNECTION. United States. doi:10.1002/2017JA024227.
Price, L., Swisdak, M., Drake, J. F., Burch, J. L., Cassak, P. A., and Ergun, R. E. Thu . "Turbulence in Three-Dimensional Simulations of Magnetopause Reconnection: TURBULENCE DURING 3-D RECONNECTION". United States. doi:10.1002/2017JA024227. https://www.osti.gov/servlets/purl/1461528.
@article{osti_1461528,
title = {Turbulence in Three-Dimensional Simulations of Magnetopause Reconnection: TURBULENCE DURING 3-D RECONNECTION},
author = {Price, L. and Swisdak, M. and Drake, J. F. and Burch, J. L. and Cassak, P. A. and Ergun, R. E.},
abstractNote = {We present detailed analysis of the turbulence observed in three-dimensional particle-in- cell simulations of magnetic reconnection at the magnetopause. The parameters are representative of anelectron diffusion region encounter of the Magnetospheric Multiscale (MMS) mission. The turbulence is found to develop around both the magnetic X line and separatrices, is electromagnetic in nature, is characterized by a wave vector k given by kρe~(meTe/miTi)0.25 with ρe the electron Larmor radius, and appears to have the ion pressure gradient as its source of free energy. Taken together, these results suggest the instability is a variant of the lower hybrid drift instability. The turbulence produces electric field fluctuations in the out-of-plane direction (the direction of the reconnection electric field) with an amplitude of around ±10 mV/m, which is much greater than the reconnection electric field of around 0.1 mV/m. Such large values of the out-of-plane electric field have been identified in the MMS data. The turbulence in the simulations controls the scale lengths of the density profile and current layers in asymmetric reconnection,driving them closer to $ \sqrt{} $ρeρi than the ρe or de scalings seen in 2-D reconnection simulations, and produces significant anomalous resistivity and viscosit y in the electron diffusion region.},
doi = {10.1002/2017JA024227},
journal = {Journal of Geophysical Research. Space Physics},
number = 11,
volume = 122,
place = {United States},
year = {2017},
month = {10}
}

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