A drift model of interchange instability

E. S. Benilov, O. A. Power

Research output: Contribution to journalArticlepeer-review

Abstract

A set of asymptotic equations is derived, describing the dynamics of the flute mode in a magnetized plasma with cold ions, under a "local" approximation (i.e., near a particular point). The asymptotic set is then used to calculate the growth rate of interchange instability in the slab model. It is shown that, unlike the magnetohydrodynamic ordering, the drift one allows instability to occur for either sign of the pressure gradient (i.e., for both "bad" and "good" curvature of the magnetic field). It is also demonstrated that finite beta gives rise to an extra instability that does not exist in the small-beta limit.

Original languageEnglish
Article number082101
JournalPhysics of Plasmas
Volume14
Issue number8
DOIs
Publication statusPublished - 2007

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