Anomalous diffusion in magnetoactive plasma in the presence of a lower- and upper-hybrid pump wave

It is shown that the parametric coupling of lower-hybrid waves with purely damped convective cells leads to a purely growing instability. Under these parametric instability conditions we found that the magnitude of the diffus ion coefficient obtained is essentially greater than the corresponding one for the case of a stable plasma when the external pump wave is absent. We a lso investigated the inhomogeneous magnetized plasma with a density gradien t. We assume that such a plasma is subjected to the upper-hybrid pump wave which decays into the daughter upper-hybrid and electron drift waves. It is shown, in the region above the instability threshold, that the turbulent d iffusion coefficient grows with an increasing density gradient and the inte nsity of the pump wave and is independent of the magnetic field.