Thin electron-scale layers at the magnetopause

Details Thin electron-scale layers at the magnetopause Thin electron-scale layers at the magnetopause

Feb 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3103803a&link_type=abstract

Geophysical Research Letters, Volume 31, Issue 3, CiteID L03803

Physics

Plasma Physics

20

Magnetospheric Physics: Electric Fields (2411), Magnetospheric Physics: Magnetopause, Cusp, And Boundary Layers, Space Plasma Physics: Magnetic Reconnection

Scientific paper

We use data from the four Cluster satellites to examine the microphysics of a thin electron-scale layer discovered on the magnetospheric side of the magnetopause. Here the ion and electron motions are decoupled in a layer about 20 km (a few electron scales) wide, including currents and strong electric fields. In this layer the electrons are E × B drifting with the ions as a background, and the region can be described by Hall MHD physics. A unique identification of the source of the thin layer is not possible, but our observations are consistent with recent simulations showing thin layers associated with the separatrix extending far away from a reconnection diffusion region.

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