Structure of quasiflute perturbations in a plasma in long closed magnetic traps

Structure of nonlocal quasiflute perturbations, which by low but finite pressures in long closed magnetic traps are often more dangerous as compared to MGD traditional perturbations, is considered. Examples of experimental equations, potential energy of which always tends to the minimum, are plotted and dynamics of perturbation structure changes according to the increase of mode number is shown. Relatively simple mode perturbations, potential energy of which tends to the same value as the energy of the most dangerous perturbations, are also plotted