Transport in sheared stochastic magnetic fields

Research output: Contribution to journalArticle

Abstract

The transport of test particles in a stochastic magnetic field with a sheared component is studied. Two stages in the particle dynamics are distinguished depending on whether the collisional effects perpendicular to the main field are negligible or not. Whenever the perpendicular collisions are unimportant, the particles show a subdiffusive behavior which is slower in the presence of shear. The particle dynamics is then inhomogeneous and non-Markovian and no diffusion coefficient may be properly defined. When the perpendicular collision frequency is small, this subdiffusive stage may be very long. In the truly asymptotic stage, however, the perpendicular collisions must be accounted for and the particle motion eventually becomes diffusive. Here again, however, the shear is shown to reduce the anomalous diffusion coefficient of the system.

Original languageEnglish (US)
Pages (from-to)270-276
Number of pages7
JournalPhysics of Plasmas
Volume4
Issue number2
StatePublished - 1997

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magnetic fields
collisions
diffusion coefficient
shear
particle motion

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Condensed Matter Physics

Cite this

Transport in sheared stochastic magnetic fields. / Vanden Eijnden, Eric; Balescu, R.

In: Physics of Plasmas, Vol. 4, No. 2, 1997, p. 270-276.

Research output: Contribution to journalArticle

Vanden Eijnden, Eric ; Balescu, R. / Transport in sheared stochastic magnetic fields. In: Physics of Plasmas. 1997 ; Vol. 4, No. 2. pp. 270-276.
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