Experimental study of mini-magnetosphere
| Autor: | V. M. Antonov, A. V. Melekhov, Shaikhislamov I F, V. G. Posukh, A. G. Ponomarenko, Yu. P. Zakharov, E. L. Boyarintsev |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Physics
Magnetosphere FOS: Physical sciences Ion current Plasma Condensed Matter Physics Space Physics (physics.space-ph) Physics - Plasma Physics Computational physics Magnetic field Plasma Physics (physics.plasm-ph) Current sheet Dipole Nuclear Energy and Engineering Physics - Space Physics Physics::Space Physics Electric current Magnetic dipole |
| Popis: | Magnetosphere at ion kinetic scales, or mini-magnetosphere, possesses unusual features as predicted by numerical simulations. However, there are practically no data on the subject from space observations and the data which are available are far too incomplete. In the present work we describe results of laboratory experiment on interaction of plasma flow with magnetic dipole with parameters such that ion inertia length is smaller than a size of observed magnetosphere. A detailed structure of non-coplanar or out-of-plane component of magnetic field has been obtained in meridian plane. Independence of this component on dipole moment reversal, as was reported in previous work, has been verified. In the tail distinct lobes and central current sheet have been observed. It was found that lobe regions adjacent to boundary layer are dominated by non-coplanar component of magnetic field. Tail-ward oriented electric current in plasma associated with that component appears to be equal to ion current in the frontal part of magnetosphere and in the tail current sheet implying that electrons are stationary in those regions while ions flow by. Obtained data strongly support the proposed model of mini-magnetosphere based on two-fluid effects as described by the Hall term. |
| Databáze: | OpenAIRE |
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