Novel transit-time oscillator (TTO) combining advantages of radial-line and axial TTO

doi:10.1088/1674-1056/28/8/085201

Abstract A novel transit-time oscillator (TTO) is proposed in this paper. An axial cathode which has been widely used in high power microwave (HPM) source and an extractor with radial feature are adopted. In this way, the inherent advantages of axial and radial TTO, both of which can be utilized as high-quality intense relativistic electron beam (IREB), can be generated and the power capacity is also increased. The working mode is π/2 mode of TM₀₁ based on small-signal theory, and under the same energy storage, the maximum electric field in extractor decreases 16.3%. Besides, by utilizing the natural bending of the solenoid, this TTO saves over 60% of the length required by the uniform magnetic field, and consequently reduces the energy consumed by solenoid. The PIC simulation shows that by using 1.0-T decreasing magnetic field generated by the shorter solenoid, 3.37-GW microwave at 12.43 GHz is generated with 620-kV and 13.27-kA input, and the overall conversion efficiency is 41%.

Keywords: axial TTO radial-feature extractor larger power capacity shorter uniform magnetic field

Received: 02 April 2019
Revised: 21 May 2019
Accepted manuscript online:

PACS:

52.35.Fp

(Electrostatic waves and oscillations (e.g., ion-acoustic waves))

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 61701516).

Corresponding Authors: Jun-Tao He
E-mail: hejuntao12@163.com

Cite this article:

Wei-Li Xu(徐伟力), Jun-Tao He(贺军涛), Jun-Pu Ling(令钧溥), Li-Li Song(宋莉莉), Bing-Fang Deng(邓秉方), Ouzhixiong Dai(戴欧志雄), Xing-Jun Ge(葛行军) Novel transit-time oscillator (TTO) combining advantages of radial-line and axial TTO 2019 Chin. Phys. B 28 085201

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Novel transit-time oscillator (TTO) combining advantages of radial-line and axial TTO

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