Convective filamentation instability of circularly polarized Alfvén waves

Spencer Kuo, M. H. Whang, G. Schmidt

Research output: Contribution to journalArticle

Abstract

A convective instability that leads to the filamentation of large-amplitude Alfvén waves and generates nonoscillatory spatially growing density fluctuations is investigated by using a two-fluid plasma model. Based on linear perturbation analysis for a four-wave parametric coupling process, the dispersion relations of the instability for both a right- and left-hand circularly polarized Alfvén pump are derived. They are then solved numerically for the dependences of the threshold fields and growth rates on the wavenumber k of the nonoscillatory mode, the beta of the plasma, and the frequency of the pumps, for both right- and left-hand circularly polarized Alfvén pumps. The relevance of the proposed instability with some observations in the space plasmas is discussed.

Original languageEnglish (US)
Pages (from-to)734-740
Number of pages7
JournalPhysics of Fluids B
Volume1
Issue number4
StatePublished - 1989

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Pumps
pumps
Plasmas
Plasma stability
space plasmas
perturbation
Fluids
thresholds
fluids

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Mechanics of Materials
  • Computational Mechanics
  • Fluid Flow and Transfer Processes

Cite this

Convective filamentation instability of circularly polarized Alfvén waves. / Kuo, Spencer; Whang, M. H.; Schmidt, G.

In: Physics of Fluids B, Vol. 1, No. 4, 1989, p. 734-740.

Research output: Contribution to journalArticle

Kuo, Spencer ; Whang, M. H. ; Schmidt, G. / Convective filamentation instability of circularly polarized Alfvén waves. In: Physics of Fluids B. 1989 ; Vol. 1, No. 4. pp. 734-740.
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