New stationary solutions of the nonlinear drift wave equation

A new type of nonlinear wave modes which occur as the electrostatic drift waves in an inhomogeneous magnetized plasma is presented. The existence of a new type of spiky solitary wave and an explosive mode with the negative potential are predicted as stationary solutions of this equation. These solutions are a consequence of a density gradient and not connected with a temperature gradient. Using these nonlinear wave modes, the solitary structure and the explosive event concerning nonlinear drift waves propagating in interplanetary space and the Earth's magnetosphere, are understandable. (author)