Gyromap for a two-dimensional Hamiltonian fluid model derived from Braginskii’s closure for magnetized plasmas

We consider a plasma described by means of a two-dimensional fluid model across a constant but non-uniform magnetic field B=B(x,y)z∧. The dynamical evolution of the density and the vorticity takes into account the interchange instability and magnetic field inhomogeneities. First, in order to describe the finite Larmor radius effects, we apply the gyromap to build a Hamiltonian model with ion temperature from a cold-ion model. Second, we show that the gyromap is justified using Braginskii’s closure for the stress tensor as well as an apt ordering on the fluctuating quantities.