Stabilization of ballooning modes by nonparaxial cells

An analysis is made of the effect of high-curvature stabilizing nonparaxial elements (cells) on the MHD plasma stability in open confinement systems and in confinement systems with closed magnetic field lines. It is shown that the population of particles trapped in such cells has a stabilizing effec...

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Bibliographic Details
Published in:Plasma physics reports 2005-01, Vol.31 (1), p.3-13
Main Authors: Arsenin, V. V., Zvonkov, A. V., Skovoroda, A. A.
Format: Article
Language:English
Subjects:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BALLOONING INSTABILITY
FLUTE INSTABILITY
MAGNETIC FIELDS
MAGNETOHYDRODYNAMICS
PLASMA
PLASMA CONFINEMENT
STABILIZATION
TRAPPING
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Summary:An analysis is made of the effect of high-curvature stabilizing nonparaxial elements (cells) on the MHD plasma stability in open confinement systems and in confinement systems with closed magnetic field lines. It is shown that the population of particles trapped in such cells has a stabilizing effect not only on convective (flute) modes but also on ballooning modes, which govern the maximum possible {beta} value. In the kinetic approach, which distinguishes between the effects of trapped and passing particles, the maximum possible {beta} values consistent with stability can be much higher than those predicted by the MHD model.
ISSN:1063-780X
1562-6938
DOI:10.1134/1.1856704