Higher-order mode operation of a high-power gyrotron

Author

Zhang, Shi-Chan

Author_Institution

Inst. of Photoelectron., Southwest Jiaotong Univ., Sichuan, China

Volume

2

fYear

2001

fDate

3-6 Dec. 2001

Firstpage

787

Abstract

A gyrokinetic analysis is presented to determine the influence of electron beam eccentricity on the power and starting current of a coaxial cavity gyrotron, which operates in a higher-order mode TE_31.17.1 with a frequency of 165 GHz. It is found that the starting current becomes larger because of the existence of the electron-beam eccentricity. Especially, the power is decreased substantially by electron beam eccentricity, for example, down to 93% of the power without any eccentricity even if the eccentricity is only 1% of the outer conductor radius. The acceptable range of electron beam voltage and operating magnetic field for the establishment of the electromagnetic oscillation is narrowed by electron-beam eccentricity.

Keywords

electromagnetic oscillations; gyrotrons; millimetre wave tubes; relativistic electron beam tubes; starting; 165 GHz; TE/sub 31.17.1/ mode; coaxial cavity gyrotron; electromagnetic oscillation; electron beam eccentricity; electron beam voltage; gyrokinetic analysis; high-power gyrotron; higher-order mode operation; operating magnetic field; outer conductor radius; relativistic electron beam; starting current; Coaxial components; Conductors; Electromagnetic fields; Electron beams; Frequency; Gyrotrons; Magnetic analysis; Magnetic fields; Oscillators; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference, 2001. APMC 2001. 2001 Asia-Pacific

Conference_Location

Taipei, Taiwan

Print_ISBN

0-7803-7138-0

Type

conf

DOI

10.1109/APMC.2001.985488

Filename

985488