Linear theory of a dielectric-loaded rectangular Cerenkov maser with a sheet electron beam

• 作 者: 陈晔 赵鼎 刘文鑫 王勇 万晓声
• 机 构: Key Laboratory of High Power Microwave Sources and Technologies,Institute of Electronics,Chinese Aca
• 出 处: Chinese Physics B
• 发表日期: 2012年10期
• 关键词: dielectric loaded resonant rectangular sheet matching approximate analysed dilut

A three-dimensional model of a dielectric-loaded rectangular Cerenkov maser with a sheet electron beam for the beam-wave interaction is proposed.Based on this model,the hybrid-mode dispersion equation is derived with the Borgnis potential function by using the field-matching method.Its approximate solution is obtained under the assumption of a dilute electron beam.By using the Ansoft high frequency structural simulator(HFSS) code,the electromagnetic field distribution in the interaction structure is given.Through numerical calculations,the effects of beam thickness,beam and dielectric-layer gap distance,beam voltage,and current density on the resonant growth rate are analysed in detail.

A three-dimensional model of a dielectric-loaded rectangular Cerenkov maser with a sheet electron beam for the beam-wave interaction is proposed. Based on this model, the hybrid-mode dispersion equation is derived with the Borgnis potential function by using the field- matching method. Its approximate solution is obtained under the assumption of a dilute electron beam.By using the Ansoft high frequency structural simulator (HFSS) code, the electromagnetic field distribution in the interaction structure is given.Through numerical calculations, the effects of beam thickness , beam and dielectric-layer gap distance, beam voltage, and current density on the resonant growth rate are analyzed in detail.