A novel coaxial Ku-band transit radiation oscillator without external guiding magnetic field

作者：Ling, Junpu^*; Zhang, Jiande; He, Juntao; Jiang, Tao

来源：Physics of Plasmas, 2014, 21(2): 023114.

DOI：10.1063/1.4866148

A novel coaxial transit radiation oscillator without external guiding magnetic field is designed to generate high power microwave at Ku-band. By using a coaxial structure, the space-charge potential energy is suppressed significantly, that is good for enhancing efficient beam-wave interaction. In order to improve the transmission stability of the unmagnetized intense relativistic electron beam, a Pierce-like cathode is employed in the novel device. By contrast with conventional relativistic microwave generators, this kind of device has the advantages of high stability, non-guiding magnetic field, and high efficiency. Moreover, with the coaxial design, it is possible to improve the power-handing capacity by increasing the radial dimension of the Ku-band device. With a 550 keV and 7.5 kA electron beam, a 1.25 GW microwave pulse at 12.08 GHz has been obtained in the simulation. The power conversion efficiency is about 30%.

• 出版日期2014-2
• 单位中国人民解放军国防科学技术大学