Hall current effect on tearing mode instability

Details Hall current effect on tearing mode instability Hall current effect on tearing mode instability

Jun 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983georl..10..475t&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 10, June 1983, p. 475-478.

Physics

120

Geomagnetism, Hall Effect, Magnetohydrodynamic Stability, Space Plasmas, Tearing Modes (Plasmas), Collisional Plasmas, Eigenvectors, Geomagnetic Tail, Magnetopause

Scientific paper

From a linear 2-D eigenmode analysis, it is found that the Hall current effect on collisional tearing mode instability becomes important for the thin magnetic reversal layer whose width is comparable to the ion inertia length; Hall currents produce a three-dimensional field structure and increase the reconnection (growth) rate. Since the magnetaic reversal layer widths both in the magnetopause and in the magnetotail are reported to become as thin as the ion inertial length (several hundred km) when the reconnection process is supposed to occur, the Hall current effect may explain the appearance of the dawn-dusk component of the magnetic field in the magnetotail reconnection region.

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