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It has been suggested, that reconnecting ballooning modes in which electron inertia replaces resistvity in a non-ideal magnetohydrodynamic Ohm's law can have substantial growth rates in low collisionality regime. Numerical calculation, albeit necessarily at unrealistically large values of collisionless skin depth, showed that strongly growing balloning modes exist at beta values which are below the ideal beta limit. In order to investigate stability at more realistic values of the collisionless skin depth we exploit an analytic approach. As in the case of resistive ballooning modes, we find that inertial balloning modes are stabilized by favourable average curvature effects at moderate values, the stability index for resistive balloning.

Additional information

Authors: COONOR J W, UKAEA Fusion Association, Culham Science Centre, Abingdon, Oxon (GB);HASTIE R J, UKAEA Fusion Association, Culham Science Centre, Abingdon, Oxon (GB)
Bibliographic Reference: Report: EN (1999) 10pp.
Availability: Available from the Librarian, UKAEA, Culham Laboratory, Abingdon, Oxon (GB)
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