Influence of density gradient on absorption of upper hybrid pump energy in turbulent plasma

Summary form only given, as follows. In the present report on the basis of kinetic fluctuation theory we study the absorption of an upper hybrid wave in magnetized inhomogeneous plasma with density gradient. We have calculated the effective collision frequency V/sub eff/ in the turbulent state of such a plasma when the amplitude of pump wave E/sub 0/ exceeds the parametric instability threshold E/sub th/. As it turns out V/sub eff//spl Gt/V/sub ei/ where V/sub ei/ is the electron-ion collision frequency. We have thus deduced the efficiency for the absorption of upper hybrid wave energy in a plasma, as the absorbed power is proportional to V/sub eff/ E/sub 0//sup 2/. Our results can thus be of interest for upper hybrid heating of plasmas.