Fast reconnection in high-Lundquist-number plasmas due to the plasmoid Instability

A. Bhattacharjee, Yi Min Huang, H. Yang, B. Rogers

Research output: Contribution to journalArticle

294 Scopus citations

Abstract

Thin current sheets in systems of large size that exceed a critical value of the Lundquist number are unstable to a super-Alfvénic tearing instability, referred to hereafter as the plasmoid instability. The scaling of the growth rate of the most rapidly growing plasmoid instability with respect to the Lundquist number is shown to follow from the classical dispersion relation for tearing modes. As a result of this instability, the system realizes a nonlinear reconnection rate that appears to be weakly dependent on the Lundquist number, and larger than the Sweet-Parker rate by nearly an order of magnitude (for the range of Lundquist numbers considered). This regime of fast reconnection is realizable in a dynamic and highly unstable thin current sheet, without requiring the current sheet to be turbulent.

Original languageEnglish (US)
Article number112102
Number of pages1
JournalPhysics of Plasmas
Volume16
Issue number11
DOIs
StatePublished - Dec 16 2009
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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