Study of open cavity filled with plasma density grating

The dielectric open cavity filled with the plasma is studied. The plasma de nsity grating formed by the slow wave modulation influences the resonant pa rameters. Based on an equivalent model of the plasma density grating, a dis persion relation is derived and the resonant frequency, the diffraction Q v alue, and the field function are calculated, The field magnitude in the slo w-wave region increases greatly as the plasma density increases, which can help to explain the enhancement of the beam-wave interaction efficiency.