Effects of magnetic separatrix and pressure pedestal on finite beta external kink–tearing modes
- 1 May 1986
- journal article
- research article
- Published by AIP Publishing in Physics of Fluids
- Vol. 29 (5), 1629-1632
- https://doi.org/10.1063/1.865679
Abstract
The roles of a magnetic separatrix and of a steep‐edge pressure gradient on finite beta external kink and tearing modes in tokamaks are examined by using a newly developed initial value code. For fixed profiles of current density and pressure, the separatrix is found to have a weak effect on the linear characteristics of the global mode. The presence of a steep pressure gradient at the plasma edge reduces the overall growth rate in a similar fashion for both cases with and without the separatrix.Keywords
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