Investigation of -quasi-periodic RF cavity for high power microwave source

The main part of quasi-periodic RF cavity is the periodic structure. With the strong leading magnet field, the relativistic electron beam can produce high power microwave in such cavity. The interaction between the beam and the microwave field can be divided into three processes: electron capture, bunch and electron momentum turning into microwave field. The role of the main part is for electron capture. High efficiency and high microwave power can be obtained with optimized cavity. In this paper, the electron movement is studied under the action of the microwave field in the cavity, and electron capture and bunch are also explored. In the simulation, the output power of 1.3GW is obtained at X-band(9.3GHz) using such cavity driven by ring beam, whose parameters are 760kV and 7kA, and the e