Improvement of linear model of plasma filled dielectric Cerenkov maser

The plasma filled dielectric Cerenkov maser considering the effect of the p lasma grating has been studied. The plasma grating is formed by the modulat ion of the strong fields. According to the plasma-grating model, An equival ent model is constructed. The modified dispersion relation has been derived . The numerical results show that when the modulation over the background p lasma increases, the operation frequency also increases, however, the growt h rate varies slightly. Compared with the calculation results obtained by t reating the plasma as uniform fluids, the calculation results with the equi valent model describe the bounded bandwidth of the dielectric oscillator mo re precisely.