Theory of Ballooning Modes in Tokamaks with Finite Shear
- 10 October 1977
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 39 (15) , 943-946
- https://doi.org/10.1103/physrevlett.39.943
Abstract
We studied ballooning instabilities in tokamaks of arbitrary cross section and finite shear. These azimuthally localized, ideal magnetohydrodynamic modes have large toroidal-mode numbers, but finite variation along the field and across the flux surfaces. Stability is determined by solving a second-order ordinary differential equation on each flux surface, subject to the proper boundary conditions. Qualitative agreement is achieved with the Princeton pest stability code.Keywords
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