Theory and simulation of the Rayleigh-Taylor instability in the large Larmor radius

The theory and first nonlinear simulations of the Rayleigh-Taylor instability in the limit of large ion Larmor radius are presented. It is shown that in the limit of large Larmor radius, the Rayleigh-Taylor instability evolves much faster and in a dramatically different manner than in the limit of small Larmor radius.