Formation of a quasi-one-dimensional current sheet in the laboratory experiment and in the Earth’s magnetotail

Yushkov, E.V.; Frank, A.G.; Artemyev, A.V.; Petrukovich, A.A.; Vasko, I.Y.

Авторы: Yushkov E.V., Frank A.G., Artemyev A.V., Petrukovich A.A., Vasko I.Y.
Журнал: Plasma Physics Reports
Том: 41
Номер: 1
Год издания: 2015
Издательство: Maik Nauka/Interperiodica Publishing
Местоположение издательства: Russian Federation
Первая страница: 71
Последняя страница: 87
DOI: 10.1134/S1063780X15010055
Аннотация: Two-dimensional current sheets (CSs) generated in the CS-3D laboratory device are considered. Results obtained in the laboratory experiment are compared with spacecraft observations of CSs in the Earth’s magnetotail. The longitudinal and transverse CS structures, as well as CS evolution during the thinning process are studied. It is demonstrated that the CSs obtained in the laboratory experiments and those observed by spacecraft possess common properties: they have the same dimensionless spatial scales, similar distributions of the normal component of the magnetic field along the sheet, and similar ratios between the current density and the normal component of the magnetic field. The results of comparison allow one to guess some details of the structure and dynamics of the Earth’s magnetotail CS. In particular, on the basis of the laboratory experiment, it is concluded that the formation of a quasi-one-dimensional CS in the magnetotail at distances of x ∼ −15R E from the Earth (where R E is the Earth’ radius) is accompanied by the growth of the amplitude B 0 of the tangential component of the magnetic field and that the field B 0 in the quasi-stationary state increases tailward. The critical value of the current density is likely equal to j 0. The current density cannot substantially exceed this value. Moreover, the CS thickness cannot be substantially smaller then the ion Larmor radius or the ion inertial length.
Добавил в систему: Юшков Егор Владиславович

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Formation of a quasi-one-dimensional current sheet in the laboratory experiment and in the Earth’s magnetotailстатья