Fu, G. Y.Isaev, M.Ku, L. P.Mikhailov, M.Redi, M. H.Sanchez, R.Subbotin, A.Cooper, W. A.Hirshman, S. P.Monticello, D. A.Reiman, A.Zarnstorff, M.2008-04-162008-04-162008-04-16200710.13182/FST07-A1300https://infoscience.epfl.ch/handle/20.500.14299/22420WOS:00024442240000510163The ideal magnetohydrodynamic (MHD) stability of the National Compact Stellarator Experiment (NCSX) is extensively analyzed using the most advanced three-dimensional MHD codes. It is shown that the NCSX is stable to finite-n MHD modes, including the vertical mode, external kink modes and ballooning modes. However, high-n external kink modes that peak near the plasma edge are found to be weakly unstable. A global calculation shows that finite-n ballooning modes are significantly more stable than the local infinite-n modes.text::journal::journal article::research article