Vortex dynamics in inhomogeneous plasmas

The dynamics of vortical structures in magnetized plasmas with nonuniform d ensity is investigated numerically. In particular the dynamics of monopolar vortices is considered and the results are discussed in terms of the conse rvation of potential vorticity. It is found that individual vortex structur es tend to transport density up the gradient in contrast to structures embe dded in developed turbulence, which on the average will lead to a flattenin g of the density gradient. The role of vortical structures in connection wi th electrostatic plasma turbulence and the associated cross-field plasma tr ansport is also addressed.