Generation of high frequency O-wave in inhomogeneous plasma in presence of drift wave turbulence

Summary form only given. Amplification of high-frequency O-wave in presence of drift wave turbulence has been considered. The thermal particles which are found to be strongly in phase relation with drift wave turbulence field may be accelerated and these accelerated particles transfer their momentum to O-wave (nonresonant) through a modulated field. This mechanism of wave amplification called Plasma Maser effect was predicted by Nambu as well as by Tsytovich, Stenflo and Wilhelmsson some time back. In this paper, we have considered Maxwellian distribution function of spatially inhomogeneous plasma under standard local approximation and the Fourier components of fluctuating parts of distribution function which arise due to drift wave turbulence field have been estimated. The interaction of O-wave with drift wave turbulence field is considered as the perturbation to the weakly turbulent plasma and subsequently the Fourier components of various fluctuating parts of particle distribution function due to the perturbation has been estimated. The growth rate of O-wave is obtained from the nonlinear dispersion relation using Maxwell´s equation. It has been observed that O-wave may be amplified at the expense of drift wave turbulent energy.