Plasma and momentum transport processes in the vicinity of a magnetic island in a tokamak

K. C. Shaing, C. C. Hegna, J. D. Callen, W. A. Houlberg

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)

Abstract

In the vicinity of a magnetic island in tokamaks, the toroidal symmetry in the magnitude of the magnetic field |B| is broken. This leads to enhanced radial transport fluxes and momentum dissipation. The radial electric field can be determined from the quasineutrality condition, or equivalently the momentum equation, on the island magnetic surface. The equation that governs the radial electric field is nonlinear and can have bifurcated solutions. This may suppress turbulence fluctuations and improve plasma confinement. The theory remains valid for a rotating island with an appropriate re-interpretation of the radial electric field.

Original languageEnglish
Pages (from-to)258-261
Number of pages4
JournalNuclear Fusion
Volume43
Issue number4
DOIs
Publication statusPublished - 2003 Apr 1

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Condensed Matter Physics

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