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

被引：23

作者：

Ling, Junpu ^{[1
]}

Zhang, Jiande ^{[1
]}

He, Juntao ^{[1
]}

Jiang, Tao ^{[1
]}

机构：

[1] Natl Univ Def Technol, Coll Photoelect Sci & Engn, Changsha 410073, Hunan, Peoples R China

来源：

PHYSICS OF PLASMAS | 2014年 / 21卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Microwaves - Potential energy - Electron beams - Microwave oscillators;

D O I：

10.1063/1.4866148

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

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%. (C) 2014 AIP Publishing LLC.

引用

页数：7

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