Nonlinear ion-drift waves in a nonuniform plasma with nonzero ion-temperature-gradient effects

It is shown that Grad hydrodynamics dan be used for the description of nonl inear ion-drift waves in a low beta plasma. The set of nonlinear equations which allows us to describe both the ion polarization drift and the nonzero ion Larmor;radius effects is derived. The presence of a nonzero ion temper ature gradient induces a corresponding perpendicular thermal flux which in turn substantially modifies; the transverse stress tensor. Thus, the descri ption of effects associated with the perpendicular ion polarization drift d emands corrections in the magnetic viscosity due to the nonzero thermal flu x. (C) 2001 American Institute of Physics. [DOI: 10.1063/1.1316764].