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The effect of fine multilayered structuring on the resonant periods of global sausage (m=0), fast magnetoacoustic oscillations of coronal loops is studied for the straight magnetic slab model filled with a zero-β plasma. The slab is considered to have a one-dimensional inhomogeneity of the Alfvén speed in the direction perpendicular to the axis of the slab, which coincides with the equilibrium, straight,...
The possibility of remote diagnostics of coronal structures with impulsively-generated short-period fast magnetoacoustic wave trains is demonstrated. An initially broad-band, aperiodic fast magnetoacoustic perturbation guided by a 1D plasma inhomogeneity develops into a quasi-periodic wave train with a well-pronounced frequency and amplitude modulation. The quasi-periodicity results from the geometrical...
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