CONICET | Buscador de Institutos y Recursos Humanos

For a plasma, embedded in a strong external magnetic field, the spatial structures tend to elongate along the field lines. This feature, that allowed a major simplification in the theoretical structure of one fluid magnetohydrodynamics (leading to reduced MHD), is exploited here to derive what may be called the reduced Hall MHD equations (RHMHD) reflecting two fluid effects like the Hall current and the electron pressure. These physical effects, which can be relevant in astrophysical environments and also in fusion plasmas, allow for the propagation of circularly polarized normal modes such as whistlers and shear/ion-cyclotron waves.In this paper we also numerically integrate the RHMHD system of equations to investigate externally driven turbulence.