Instability of current sheets and formation of plasmoid chains

Details Instability of current sheets and formation of plasmoid chains Instability of current sheets and formation of plasmoid chains

2007-03-24

arxiv.org/abs/astro-ph/0703631v2

Phys. Plasmas 14, 100703, (2007)

Astronomy and Astrophysics

Astrophysics

revtex, 4 pages, 4 figures

Scientific paper

10.1063/1.2783986

Current sheets formed in magnetic reconnection events are found to be
unstable to high-wavenumber perturbations. The instability is very fast: its
maximum growth rate scales as S^{1/4} v_A/L, where L is the length of the
sheet, v_A the Alfven speed and S the Lundquist number. As a result, a chain of
plasmoids (secondary islands) is formed, whose number scales as S^{3/8}.

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