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Title: Characterizing Ion Flows Across a Magnetotail Dipolarization Jet: Characterizing Ion Flows Across a Magnetotail Dipolarization Jet

Abstract

The structure of dipolarization jets with finite width in the dawn-dusk direction relevant to magnetic reconnection in the Earth's magnetotail is explored with particle-in-cell simulations. We carry out Riemann simulations of the evolution of the jet in the dawn-dusk, north-south plane to investigate the dependence of the jet structure on the jet width in the dawn-dusk direction. We find that the magnetic field and Earth-directed ion flow structure depend on the dawn-dusk width. A reversal in the usual Hall magnetic field near the center of the current sheet on the duskside of larger jets is observed. For small widths, the maximum velocity of the earthward flow is significantly reduced below the theoretical limit of the upstream Alfvén speed. However, the ion flow speed approaches this limit once the width exceeds the ion Larmor radius based on the normal magnetic field, $B^z$.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]
  1. Univ. of Maryland, College Park, MD (United States). Inst. for Research in Electronics and Applied Physics
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1544238
Grant/Contract Number:  
NNX14AC78G
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Geophysical Research. Space Physics
Additional Journal Information:
Journal Volume: 123; Journal Issue: 8; Journal ID: ISSN 2169-9380
Publisher:
American Geophysical Union
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS

Citation Formats

Arnold, H., Swisdak, M., and Drake, J. F. Characterizing Ion Flows Across a Magnetotail Dipolarization Jet: Characterizing Ion Flows Across a Magnetotail Dipolarization Jet. United States: N. p., 2018. Web. doi:10.1029/2018JA025604.
Arnold, H., Swisdak, M., & Drake, J. F. Characterizing Ion Flows Across a Magnetotail Dipolarization Jet: Characterizing Ion Flows Across a Magnetotail Dipolarization Jet. United States. doi:10.1029/2018JA025604.
Arnold, H., Swisdak, M., and Drake, J. F. Tue . "Characterizing Ion Flows Across a Magnetotail Dipolarization Jet: Characterizing Ion Flows Across a Magnetotail Dipolarization Jet". United States. doi:10.1029/2018JA025604. https://www.osti.gov/servlets/purl/1544238.
@article{osti_1544238,
title = {Characterizing Ion Flows Across a Magnetotail Dipolarization Jet: Characterizing Ion Flows Across a Magnetotail Dipolarization Jet},
author = {Arnold, H. and Swisdak, M. and Drake, J. F.},
abstractNote = {The structure of dipolarization jets with finite width in the dawn-dusk direction relevant to magnetic reconnection in the Earth's magnetotail is explored with particle-in-cell simulations. We carry out Riemann simulations of the evolution of the jet in the dawn-dusk, north-south plane to investigate the dependence of the jet structure on the jet width in the dawn-dusk direction. We find that the magnetic field and Earth-directed ion flow structure depend on the dawn-dusk width. A reversal in the usual Hall magnetic field near the center of the current sheet on the duskside of larger jets is observed. For small widths, the maximum velocity of the earthward flow is significantly reduced below the theoretical limit of the upstream Alfvén speed. However, the ion flow speed approaches this limit once the width exceeds the ion Larmor radius based on the normal magnetic field, $B^z$.},
doi = {10.1029/2018JA025604},
journal = {Journal of Geophysical Research. Space Physics},
number = 8,
volume = 123,
place = {United States},
year = {2018},
month = {7}
}

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Cited by: 3 works
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