Design of a High-Harmonic Gyrotron With a Permanent Magnet System

Author

Shou Xi Xu ; Pu Kun Liu ; Liu, G.F. ; Geng, Z.H. ; Chao Hai Du ; Shi, S.H. ; Wang, Huifang ; Gu, Wanyi ; Zhang, S.C.

Author_Institution

Key Lab. of High Power Microwave Sources & Technol., Inst. of Electron., Beijing, China

Volume

60

Issue

10

fYear

2013

fDate

Oct. 2013

Firstpage

3570

Lastpage

3575

Abstract

This paper presents the conceptual design of a W-band high-harmonic gyrotron oscillator with a permanent magnet system. Mode selection, cavity design, beam-wave interaction calculations, electron-optical system, and quasi-optical mode converter output system are described. The gyrotron operates at the third harmonic of the electron cyclotron frequency with the beam interacting with a TE₀₂ circular electric mode. The permanent magnet system provided the maximum axial magnetic field of ~ 1.19 T in the cavity region of the gyrotron. In the simulations, an output power of 14 kW has been obtained at a beam voltage of 40 kV with beam current of 3 A, corresponding to an efficiency of 11.7% through optimizing system parameters.

Keywords

convertors; cyclotrons; gyrotrons; harmonic oscillators (circuits); permanent magnets; TE₀₂ circular electric mode; W-band high-harmonic gyrotron oscillator; beam-wave interaction calculation; cavity design; current 3 A; efficiency 11.7 percent; electron cyclotron frequency; electron-optical system; maximum axial magnetic field; parameter optimization; permanent magnet system; power 41 kW; quasioptical mode converter output system; voltage 40 kV; Cavity resonators; Gyrotrons; Harmonic analysis; Magnetic resonance; Oscillators; Power generation; Saturation magnetization; Permanent magnet system; W-band gyrotron; third-harmonic operation;

fLanguage

English

Journal_Title

Electron Devices, IEEE Transactions on

Publisher

ieee

ISSN

0018-9383

Type

jour

DOI

10.1109/TED.2013.2276858

Filename

6582670