Theory of Ballooning Modes in Tokamaks with Finite Shear

Ballooning instabilities in Tokamaks of arbitrary cross section and finite shear are studied. 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-o...

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Veröffentlicht in:	Phys. Rev. Lett.; (United States) 1977-10, Vol.39 (15), p.943-946
Hauptverfasser:	Dobrott, D., Nelson, D. B., Greene, J. M., Glasser, A. H., Chance, M. S., Frieman, E. A.
Format:	Artikel
Sprache:	eng
Schlagworte:	70 PLASMA PHYSICS AND FUSION TECHNOLOGY 700101 - Fusion Energy- Plasma Research- Confinement, Heating, & Production 700107 - Fusion Energy- Plasma Research- Instabilities CLOSED PLASMA DEVICES FLUID MECHANICS HYDRODYNAMICS INSTABILITY MAGNETIC FIELDS MAGNETOHYDRODYNAMICS MECHANICS PLASMA INSTABILITY PLASMA MICROINSTABILITIES SHEAR THERMONUCLEAR DEVICES TOKAMAK DEVICES
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Zusammenfassung:	Ballooning instabilities in Tokamaks of arbitrary cross section and finite shear are studied. 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 PEST two-dimensional MHD stability code.
ISSN:	0031-9007
DOI:	10.1103/PhysRevLett.39.943