The effect of an electric field induced by a time-dependent ring current on the particle drift motion期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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The effect of an electric field induced by a time-dependent ring current on the particle drift motion

Authors:	C S Wang and J S Kim

Institution:	Department of Atmospheric Science, State University of New York at Albany, Albany, New York 12222, U.S.A.

Abstract:	The effect of an electric field induced by a rapidly decaying ring current on the motion of charged particles in the magnetosphere has been investigated using Euler potentials. For a model consisting of the earth dipole and the symmetric ring current, the electric field satisfies the condition E . B = 0. Under this circumstance, the E × B drift of the particle can be identified as the motion of the magnetic field lines and vice versa. The time dependent electric field induced can be evaluated in a Spherical polar coordinate system by the formula where and β are Euler potentials. A model calculation on the particle drift velocity v_D = E × B/B² shows that the radial component of the drift velocity is in good agreement with those deduced from whistler duct studies.

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