PPPL-3357 is available in <a href="PPPL-3357.pdf">pdf</a> or 
<a href="PPPL-3357.ps">postscript</a> formats.
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<b>MHD Stability Calculations of High-beta Quasi-axisymmetric Stellarators</b>

<p>G.Y. Fu, L.P. Ku, N. Pomphrey, M.H. Redi, C. Kessel, D.A. Monticello, A. Reiman, M. Hughes, W.A. Cooper, and C. Nuehrenberg</p>

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<b>Date of PPPL Report:</b> September 27, 1999</p>

<b>Conference Paper:</b> Presented at the 17th International Atomic Energy Agency (IAEA) Conference of Fusion Energy 1998 (Yokohama, Japan, October 19-24, 1998), conference proceedings to be published by Nuclear Fusion.</p>

<p>
The MHD stability of quasi-axisymmetric compact stellarators is investigated. It is shown
that bootstrap current driven external kink modes can be stabilized by a combination of edge
magnetic shear and appropriate 3-D plasma boundary shaping while maintaining good quasi-
axisymmetry. The results demonstrate that there exists a new class of stellarators with quasi-axisymmetry, large bootstrap current, high MHD beta limit, and compact size.
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