Stability of high-beta large-aspect-ratio tokamaks

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High-beta (β»ε/q2) large-aspect-ratio (ε«1) tokamak equilibria are shown to be always stable to ideal magnetohydrodynamics (MHD) modes that are localized about a flux surface. Both the ballooning and interchange modes are shown to be stable. This work uses the analytic high-beta large-aspect-ratio tokamak equilibria developed by Cowley et al. [Phys. Fluids B 3, 2069 (1991)], which are valid for arbitrary pressure and safety factor profiles. The stability results make no assumption about these profiles nor the shape of the boundary.

Original languageEnglish (US)
Pages (from-to)3357-3362
Number of pages6
JournalPhysics of Fluids B
Issue number12
StatePublished - 1991

All Science Journal Classification (ASJC) codes

  • Computational Mechanics
  • Condensed Matter Physics
  • Mechanics of Materials
  • General Physics and Astronomy
  • Fluid Flow and Transfer Processes


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