Numerical Simulation Study of Double-Beam Magnetron-Injection Guns for High-Power Gyrotrons

Author

Zhao, Qing ; Dong, AiXiang ; Li, Hongfu ; Luo, Yong ; Wu, XiQiao ; Liu, Shenggang

Author_Institution

Sch. of Phys. Electron., Univ. of Electron. Sci. & Technol. of China, Chengdu

Volume

35

Issue

2

fYear

2007

fDate

4/1/2007 12:00:00 AM

Firstpage

402

Lastpage

406

Abstract

This paper describes the detailed design of the double-beam coaxial magnetron-injection gun (DBMIG) for use in Ka-band coaxial gyrotron with two beams operating in the harmonic mode. The DBMIG operating voltage is 70 kV with a total beam current of 20 A, evenly divided among the beamlets, and provides two 70-kV 10-A beams with a velocity ratio of 1.5. The minimum of the transverse velocity spread and the axial velocity spread are about 3% and 5%, respectively. The emitter current density has been kept below 10 Amiddotcm^-2 (space-charge limited). The primary computational tools used in the design process were the self-consistent particle-in-cell simulation code MAGIC

Keywords

electron guns; gyrotrons; magnetrons; microwave generation; 10 A; 20 A; 70 kV; Ka-band coaxial gyrotron; MAGIC code; axial velocity spread; double-beam magnetron-injection guns; emitter current density; harmonic mode; numerical simulation; particle-in-cell simulation; transverse velocity spread; Cathodes; Coaxial components; Electron beams; Geometrical optics; Geometry; Guns; Gyrotrons; Numerical simulation; Power generation; Voltage; Coaxial gyrotron with two beams (CGTB); MAGIC; double-beam coaxial magnetron-injector gun (DBMIG); magnetron-injector gun (MIG);

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/TPS.2007.892724

Filename

4154915