Nonlinear cascade processes in magnetized plasma with temperature anisotropy

A simplified nonlinear gyrokinetic formalism has been developed for general distribution functions and general magnetic perturbations. It has been found that the nonlinear coupling strength for low frequency electromagnetic modes in plasma with unisotropic temperature is larger than for the isotropic case for small Larmor radius. A nonlinear cascade where the pump mode is the mode with intermediate parallel phase velocity has been found. (authors)