The Current-Free Electric Double Layer in a Coronal Magnetic Funnel

Details The Current-Free Electric Double Layer in a Coronal Magnetic Funnel The Current-Free Electric Double Layer in a Coronal Magnetic Funnel

Apr 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006apj...640l.199b&link_type=abstract

The Astrophysical Journal, Volume 640, Issue 2, pp. L199-L202.

Astronomy and Astrophysics

Astronomy

31

Acceleration Of Particles, Magnetic Fields, Plasmas, Sun: Corona, Sun: Transition Region

Scientific paper

Current-free double layers (CFDLs) have been recently discovered in a number of laboratory devices, when a low collisional plasma is forced to expand from a high magnetic field source region to a low magnetic field diffusion region. This experimental setup bears a striking resemblance to the natural conditions prevailing in the magnetic funnels of the solar corona. It was commonly thought that magnetic-field-aligned potential disruptions were driven by electron currents, although the theoretical possibility of a CDFL has been known of for some time. Given its recent experimental verification, we make here a contribution to solar plasma physics by investigating the possibility of CFDLs in coronal funnels, which have much in common with the laboratory experiments. Therefore, CFDLs may play an important role in supplying and accelerating plasma in coronal funnels.

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