The convergence of analytic high- Β equilibrium in a finite aspect ratio tokamak

R. Y. Neches, S. C. Cowley, P. A. Gourdain, J. N. Leboeuf

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Abstract

The characteristics of near-unity- Β equilibria are investigated with two codes. CUBE is a multigrid Grad-Shafranov solver [Gourdain, J. Comput. Phys. 216, 275 (2006)], and Ophidian was written to compute solutions using analytic unity- Β equilibria [Cowley, Phys. Fluids B 3, 2066 (1991)]. Results from each method are qualitatively and quantitatively compared across a spectrum of mutually relevant parameters. These comparisons corroborate the theoretical results and provide benchmarks for high-resolution numerical results available from CUBE. Both tools facilitate the exploration of the properties of high- Β equilibria, such as a highly diamagnetic plasma and its ramifications for stability and transport.

Original languageEnglish (US)
Article number122504
JournalPhysics of Plasmas
Volume15
Issue number12
DOIs
StatePublished - Dec 1 2008
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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