Magnetic holes are magnetoplasma structures very similar to the classical θ–pinch. They are widely observed in the space plasma and identified by the substantial magnetic field depressions on scales from magnetohydrodynamic range to electron scales. In this paper, we develop the kinetic models of cylindrically symmetric magnetic holes with sub-ion scales using two types of charged particle distribution functions (both current-carrying and background plasma populations are included). We demonstrate that developed magnetic holes have configurations very similar to those revealed in the recent spacecraft observations in the Earth magnetosphere: both localized electron currents and strong radial electric fields are found at the magnetic hole boundary. We demonstrate that for realistic plasma parameters, the inclusion of ion currents into the model produces magnetic holes with double-scale magnetic field profile. We find that the magnetic hole depth (amplitude of the magnetic field depression) depends on the magnetic hole typical radius. Possible applications of developed models are discussed.
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December 2016
Research Article|
December 19 2016
Kinetic models of sub-ion cylindrical magnetic hole
P. I. Shustov;
P. I. Shustov
a)
1
Space Research Institute
, RAS, Moscow, Russia
2Department of Physics,
Moscow State University
, Moscow, Russia
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A. V. Artemyev
;
A. V. Artemyev
b)
1
Space Research Institute
, RAS, Moscow, Russia
3Institute of Geophysics and Planetary Physics,
University of California
, Los Angeles, California 90095, USA
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I. Y. Vasko;
I. Y. Vasko
1
Space Research Institute
, RAS, Moscow, Russia
4
Space Sciences Laboratory of University of California
, Berkeley, California 94720, USA
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E. V. Yushkov
E. V. Yushkov
1
Space Research Institute
, RAS, Moscow, Russia
2Department of Physics,
Moscow State University
, Moscow, Russia
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a)
Electronic mail: [email protected]
b)
Electronic mail: [email protected]
Phys. Plasmas 23, 122903 (2016)
Article history
Received:
October 24 2016
Accepted:
November 28 2016
Citation
P. I. Shustov, A. V. Artemyev, I. Y. Vasko, E. V. Yushkov; Kinetic models of sub-ion cylindrical magnetic hole. Phys. Plasmas 1 December 2016; 23 (12): 122903. https://doi.org/10.1063/1.4972093
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