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Current sheet bending as destabilizing factor in magnetotail dynamics. / Korovinskiy, D. B.; Semenov, V. S.; Erkaev, N.; Ivanov, I. B.; Kiehas, S. A.

In: Physics of Plasmas, Vol. 25, No. 9, 092901, 01.09.2018.

Research output: Contribution to journal › Article › peer-review

Harvard

Korovinskiy, DB, Semenov, VS, Erkaev, N, Ivanov, IB & Kiehas, SA 2018, 'Current sheet bending as destabilizing factor in magnetotail dynamics', Physics of Plasmas, vol. 25, no. 9, 092901. https://doi.org/10.1063/1.5046175

APA

Korovinskiy, D. B., Semenov, V. S., Erkaev, N., Ivanov, I. B., & Kiehas, S. A. (2018). Current sheet bending as destabilizing factor in magnetotail dynamics. Physics of Plasmas, 25(9), [092901]. https://doi.org/10.1063/1.5046175

Vancouver

Korovinskiy DB, Semenov VS, Erkaev N, Ivanov IB, Kiehas SA. Current sheet bending as destabilizing factor in magnetotail dynamics. Physics of Plasmas. 2018 Sep 1;25(9). 092901. https://doi.org/10.1063/1.5046175

Author

Korovinskiy, D. B. ; Semenov, V. S. ; Erkaev, N. ; Ivanov, I. B. ; Kiehas, S. A. / Current sheet bending as destabilizing factor in magnetotail dynamics. In: Physics of Plasmas. 2018 ; Vol. 25, No. 9.

BibTeX

@article{5b2abf3400614cfba322b1512cbef7f6,
title = "Current sheet bending as destabilizing factor in magnetotail dynamics",
abstract = "The problem of the magnetohydrodynamical stability of bent magnetotail current sheets is considered by means of 2.5-dimensional numerical simulations. This study is focused on the cross-tail transversal mode, modeling the magnetotail flapping motions, at the background of the Kan-like magneto-plasma equilibrium. It is found that in symmetrical current sheets, both stable and unstable branches of the solution may coexist; the growth rate of the unstable mode is rather small, so that the sheet may be considered as stable at the substorm timescale. With the increasing dipole tilt angle, the sheet bends and the growth rate rises. For sufficiently large tilt angles, the stable branch of the solution disappears. Thereby, the sheet destabilization timescale shortens for an order of magnitude, down to several minutes. The analysis of the background parameters has shown that stability loss is not related to buoyancy; it is controlled by the cross-sheet distribution of the total pressure. (C) 2018 Author(s).",
keywords = "MAGNETIC-FIELD, SOLAR-WIND, PLASMA SHEET, STABILITY, EQUILIBRIA, INSTABILITY, EARTH, TAIL",
author = "Korovinskiy, {D. B.} and Semenov, {V. S.} and N. Erkaev and Ivanov, {I. B.} and Kiehas, {S. A.}",
year = "2018",
month = sep,
day = "1",
doi = "10.1063/1.5046175",
language = "Английский",
volume = "25",
journal = "Physics of Plasmas",
issn = "1070-664X",
publisher = "American Institute of Physics",
number = "9",

}

RIS

TY - JOUR

T1 - Current sheet bending as destabilizing factor in magnetotail dynamics

AU - Korovinskiy, D. B.

AU - Semenov, V. S.

AU - Erkaev, N.

AU - Ivanov, I. B.

AU - Kiehas, S. A.

PY - 2018/9/1

Y1 - 2018/9/1

N2 - The problem of the magnetohydrodynamical stability of bent magnetotail current sheets is considered by means of 2.5-dimensional numerical simulations. This study is focused on the cross-tail transversal mode, modeling the magnetotail flapping motions, at the background of the Kan-like magneto-plasma equilibrium. It is found that in symmetrical current sheets, both stable and unstable branches of the solution may coexist; the growth rate of the unstable mode is rather small, so that the sheet may be considered as stable at the substorm timescale. With the increasing dipole tilt angle, the sheet bends and the growth rate rises. For sufficiently large tilt angles, the stable branch of the solution disappears. Thereby, the sheet destabilization timescale shortens for an order of magnitude, down to several minutes. The analysis of the background parameters has shown that stability loss is not related to buoyancy; it is controlled by the cross-sheet distribution of the total pressure. (C) 2018 Author(s).

AB - The problem of the magnetohydrodynamical stability of bent magnetotail current sheets is considered by means of 2.5-dimensional numerical simulations. This study is focused on the cross-tail transversal mode, modeling the magnetotail flapping motions, at the background of the Kan-like magneto-plasma equilibrium. It is found that in symmetrical current sheets, both stable and unstable branches of the solution may coexist; the growth rate of the unstable mode is rather small, so that the sheet may be considered as stable at the substorm timescale. With the increasing dipole tilt angle, the sheet bends and the growth rate rises. For sufficiently large tilt angles, the stable branch of the solution disappears. Thereby, the sheet destabilization timescale shortens for an order of magnitude, down to several minutes. The analysis of the background parameters has shown that stability loss is not related to buoyancy; it is controlled by the cross-sheet distribution of the total pressure. (C) 2018 Author(s).

KW - MAGNETIC-FIELD

KW - SOLAR-WIND

KW - PLASMA SHEET

KW - STABILITY

KW - EQUILIBRIA

KW - INSTABILITY

KW - EARTH

KW - TAIL

UR - http://www.scopus.com/inward/record.url?scp=85053165152&partnerID=8YFLogxK

UR - http://www.mendeley.com/research/current-sheet-bending-destabilizing-factor-magnetotail-dynamics

U2 - 10.1063/1.5046175

DO - 10.1063/1.5046175

M3 - статья

VL - 25

JO - Physics of Plasmas

JF - Physics of Plasmas

SN - 1070-664X

IS - 9

M1 - 092901

ER -

ID: 35127955