Vortex chains in development of interchange instability in plasma with velocity shear

We study a strongly nonlinear stage in the development of interchange instability of an inhomogeneous plasma with a velocity shear, placed in an external magnetic field. We show that, apart from the previously known localized solutions in the form of vortices, it is possible to find analytical solutions in the form of vortex chains, whose parts, for x > 0, and x < 0, travel with different velocities. (orig.)