Title

Collisionless Magnetic Reconnection Dynamics With Electron Inertia And Parallel Electron Compressibility

Abstract

Collisionless magnetic reconnection dynamics is considered by including the effects of electron inertia as well as parallel electron compressibility. A fluid treatment is adopted for both electrons and ions. Collisionless plasma dynamics properties near a two-dimensional X-type magnetic neutral line in the steady state are explored. The effects of electron inertia and parallel electron compressibility on the hyperbolicity (or lack thereof) of the magnetic field lines in the neutral layer are discussed. A unified linear tearing-mode formulation incorporating both electron inertia and parallel electron compressibility is given. The parallel-electron-compressibility branch is shown to couple in general to the electron-inertia branch in the presence of resistivity. A sufficient condition for linear stability in the Lyapunov sense for steady states of this collisionless plasma system signifying current confinement is deduced. Bounds on the equilibrium current gradient are shown to constitute sufficient conditions for nonlinear stability in the Lyapunov sense for steady states via nonlinear bounds for a suitable perturbation norm. © 2007 Cambridge University Press.

Publication Date

12-1-2007

Publication Title

Journal of Plasma Physics

Volume

73

Issue

6

Number of Pages

857-868

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1017/S0022377806006313

Socpus ID

36248971786 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/36248971786

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