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Title: Particle-in-cell simulation study of the scaling of asymmetric magnetic reconnection with in-plane flow shear

Abstract

We investigate magnetic reconnection in systems simultaneously containing asymmetric (anti-parallel) magnetic fields, asymmetric plasma densities and temperatures, and arbitrary in-plane bulk flow of plasma in the upstream regions. Such configurations are common in the high-latitudes of Earth's magnetopause and in tokamaks. We investigate the convection speed of the X-line, the scaling of the reconnection rate, and the condition for which the flow suppresses reconnection as a function of upstream flow speeds. We use two-dimensional particle-in-cell simulations to capture the mixing of plasma in the outflow regions better than is possible in fluid modeling. We perform simulations with asymmetric magnetic fields, simulations with asymmetric densities, and simulations with magnetopause-like parameters where both are asymmetric. For flow speeds below the predicted cutoff velocity, we find good scaling agreement with the theory presented in Doss et al. [J. Geophys. Res. 120, 7748 (2015)]. Applications to planetary magnetospheres, tokamaks, and the solar wind are discussed.

Authors:
;  [1];  [2]
  1. Department of Physics and Astronomy, West Virginia University, Morgantown, West Virginia 26506 (United States)
  2. Department of Physics and Institute for Research in Electronics and Applied Physics, University of Maryland, College Park, Maryland 20742 (United States)
Publication Date:
OSTI Identifier:
22599936
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 23; Journal Issue: 8; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ASYMMETRY; COMPUTERIZED SIMULATION; CONVECTION; FLUIDS; MAGNETIC FIELDS; MAGNETIC RECONNECTION; MAGNETOPAUSE; PARTICLES; PLANETARY MAGNETOSPHERES; PLASMA DENSITY; SCALING; SHEAR; SOLAR WIND; TOKAMAK DEVICES; TWO-DIMENSIONAL CALCULATIONS; VELOCITY

Citation Formats

Doss, C. E., Cassak, P. A., E-mail: Paul.Cassak@mail.wvu.edu, and Swisdak, M. Particle-in-cell simulation study of the scaling of asymmetric magnetic reconnection with in-plane flow shear. United States: N. p., 2016. Web. doi:10.1063/1.4960324.
Doss, C. E., Cassak, P. A., E-mail: Paul.Cassak@mail.wvu.edu, & Swisdak, M. Particle-in-cell simulation study of the scaling of asymmetric magnetic reconnection with in-plane flow shear. United States. doi:10.1063/1.4960324.
Doss, C. E., Cassak, P. A., E-mail: Paul.Cassak@mail.wvu.edu, and Swisdak, M. Mon . "Particle-in-cell simulation study of the scaling of asymmetric magnetic reconnection with in-plane flow shear". United States. doi:10.1063/1.4960324.
@article{osti_22599936,
title = {Particle-in-cell simulation study of the scaling of asymmetric magnetic reconnection with in-plane flow shear},
author = {Doss, C. E. and Cassak, P. A., E-mail: Paul.Cassak@mail.wvu.edu and Swisdak, M.},
abstractNote = {We investigate magnetic reconnection in systems simultaneously containing asymmetric (anti-parallel) magnetic fields, asymmetric plasma densities and temperatures, and arbitrary in-plane bulk flow of plasma in the upstream regions. Such configurations are common in the high-latitudes of Earth's magnetopause and in tokamaks. We investigate the convection speed of the X-line, the scaling of the reconnection rate, and the condition for which the flow suppresses reconnection as a function of upstream flow speeds. We use two-dimensional particle-in-cell simulations to capture the mixing of plasma in the outflow regions better than is possible in fluid modeling. We perform simulations with asymmetric magnetic fields, simulations with asymmetric densities, and simulations with magnetopause-like parameters where both are asymmetric. For flow speeds below the predicted cutoff velocity, we find good scaling agreement with the theory presented in Doss et al. [J. Geophys. Res. 120, 7748 (2015)]. Applications to planetary magnetospheres, tokamaks, and the solar wind are discussed.},
doi = {10.1063/1.4960324},
journal = {Physics of Plasmas},
number = 8,
volume = 23,
place = {United States},
year = {Mon Aug 15 00:00:00 EDT 2016},
month = {Mon Aug 15 00:00:00 EDT 2016}
}