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M.N. Rosenbluth1 and M.N. Bussac1
Published under licence by IOP Publishing Ltd
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Citation M.N. Rosenbluth and M.N. Bussac 1979 Nucl. Fusion 19 489
DOI 10.1088/0029-5515/19/4/007
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The 'Spheromak', an optimal force-free spherical plasma configuration, is analysed for its MHD stability properties. It is shown that flattened ellipse (oblimak) with 
= k
(k independent of 
) should be stable against all magnetically driven MHD and resistive tearing modes if surrounded by a conducting wall at about rw/r0 = 1.15. β's of at least 2% can be stably confined, equivalent to 20% in tokamaks.