Spectral stability of Alfven filament chains

The two-fluid model of nonlinear Alfven perturbations has singular solutions in the form of current-vortex filaments. We investigate analytically and numerically the spectral stability of single and double rows of filaments. Staggered and non-staggered double rows (von Karman streets) are studied. It is shown that in contrast to Euler and geostrophic vortices, single rows of Alfven filaments are stable with respect to short-wavelength perturbations. Both staggered and unstaggered streets can be completely stable within certain ranges of parameters.