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A magnetohydrodynamic (MHD) model is applied to the problem of the stability of magnetically confined thermonuclear plasmas of interest in the pursuit of fusion power. Previous studies limited to two-dimensional configurations are here generalized to three-dimensional toroidal plasmas. Using finite Fourier representations in the angle coordinates and finite hybrid elements in the radial direction, we solve the discretized Euler-Lagrange equations to determine the linear stability properties of the plasma.

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