Internal structure of a magnetic flux rope from Cluster observations

Details Internal structure of a magnetic flux rope from Cluster observations Internal structure of a magnetic flux rope from Cluster observations

Apr 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3407102l&link_type=abstract

Geophysical Research Letters, Volume 34, Issue 7, CiteID L07102

Physics

4

Magnetospheric Physics: Plasma Waves And Instabilities (2471), Magnetospheric Physics: Magnetic Storms And Substorms (7954), Magnetospheric Physics: Magnetotail

Scientific paper

We investigate a magnetic flux rope (MFR) observed by Cluster in the magnetotail during a substorm on 2001 August 22. The MFR was aligned with its principal axis closely along the dawn-dusk direction and had a small size of ~2 R E with a total current of ~0.8 MA. The four spacecraft traversed the MFR at different distances from its center based on the magnetic field signature. This fortuitous situation reveals the irregular magnetic field structure in its inner core, which is a feature reported here for the first time. At the leading edge, the y-component of the electric field was dawnward against the current density direction (dynamo action) and the x-component of the Lorentz force was Earthward. These parameters reversed in direction at its trailing edge (load).

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