Neoclassical tearing dynamo and self-sustainment of a bootstrapped tokamak

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Abstract

The dynamo effect due to neoclassical tearing modes is considered. It is found that the global constraints on energy and helicity balance require a redefinition of the dynamo field in neoclassical magnetohydrodynamics. The parallel dynamo field is calculated from the boundary-layer equations governing tearing modes. This dynamo effect can sustain a completely bootstrapped tokamak. A typical steady-state current profile has a core region of weak pressure gradients surrounded by a region of strong pressure gradients, where the current profile is entirely due to the bootstrap effect.

Original languageEnglish (US)
Pages (from-to)3661-3667
Number of pages7
JournalPhysics of Fluids B
Volume5
Issue number10
DOIs
StatePublished - Jan 1 1993
Externally publishedYes

All Science Journal Classification (ASJC) codes

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

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