Phys. Rev. Lett. 87, 035001 (2001) [4 pages]Loss of Second-Ballooning Stability in Three-Dimensional Equilibria |
PRL Celebrates 50 Years
This Week's Milestone Letters are from 1981: |
C. C. Hegna1 and S. R. Hudson2
1Departments of Physics and Engineering Physics, University of Wisconsin, Madison, Wisconsin 53706-1687
2Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543
Received 13 March 2001; published 27 June 2001
The effect of three-dimensional geometry on the stability boundaries of ideal ballooning modes is investigated. In particular, the relationship between the symmetry properties of the local shear and the magnetic curvature is addressed for quasisymmetric configurations. The presence of symmetry breaking terms in the local shear can produce localized ballooning instabilities in regions of small average magnetic shear which lower first-ballooning stability thresholds and can potentially eliminate the second stability regime.
©2001 The American Physical Society
URL: http://link.aps.org/abstract/PRL/v87/e035001
DOI: 10.1103/PhysRevLett.87.035001
PACS: 52.35.Py, 52.30.-q, 52.55.Dy, 52.55.Hc
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