A radiating one-dimensional current sheet configuration

Details A radiating one-dimensional current sheet configuration A radiating one-dimensional current sheet configuration

Sep 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993jgr....9815355p&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 98, no. A9, p. 15,355-15,363.

Physics

9

Collisionless Plasmas, Current Sheets, Magnetohydrodynamic Waves, Plasma Interactions, Wave Propagation, Current Density, Ion Motion, Iterative Solution, Mathematical Models

Scientific paper

The structure of the x-independent (one-dimensional) forced current sheet including a self consistent By component is investigated for the case of small normal field component, Bz/B0 much less than 1. A hybrid (kinetic ions, massless fluid electrons) simulation model is used to demonstrate that such a current sheet has a time-dependent structure which radiates incompressible Alfven waves with amplitude of the order of the asymptotic (lobe) field strength B0. The central density enhancement acts as the source of a propagating wavetrain in which Bx rotates into By and back again. One of the characteristic signatures of the radiating current sheet is the presence of a reversal in Bx (or By) without a corresponding increase in density.

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