A broadband gyrotron backward-wave oscillator with tapered interaction structure and magnetic field

被引：4

作者：

Li, G. D. ^{[1
]}

Chang, P. C. ^{[1
]}

Chen, H. Y. ^{[2
]}

Chiang, W. Y. ^{[1
]}

Fan, C. T. ^{[2
]}

Lin, P. N. ^{[1
]}

Kao, S. H. ^{[1
]}

Lin, Y. N. ^{[1
]}

Huang, Y. J. ^{[1
]}

Barnett, L. R. ^{[1
]}

Chu, K. R. ^{[1
]}

机构：

[1] Natl Taiwan Univ, Dept Phys, Taipei 106, Taiwan

[2] Wave Power Technol, Zhunan, Miaoli, Taiwan

来源：

PHYSICS OF PLASMAS | 2015年 / 22卷 / 11期

关键词：

EFFICIENCY ENHANCEMENT; HIGH-POWER; GUIDE; MECHANISMS; BEHAVIOR; TWT;

D O I：

10.1063/1.4934996

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：

The gyro-monotron and gyrotron backward-wave oscillator (gyro-BWO) are the two oscillator versions of gyrotrons. While serving different functions, they are also radically different in the RF field formation mechanisms. The gyro-monotron RF field profile is essentially fixed by the resonant interaction structure, while the gyro-BWO possesses an extra degree of freedom in that the axial RF field profile is self-determined by the beam-wave interaction in a waveguide structure. The present study examines ways to utilize the latter feature for bandwidth broadening with a tapered magnetic field, while also employing a tapered waveguide to enhance the interaction efficiency. We begin with a mode competition analysis, which suggests the theoretical feasibility of broadband frequency tuning in single-mode operation. It is then shown in theory that, by controlling the RF field profile with an up-or down-tapered magnetic field, the gyro-BWO is capable of efficient operation with a much improved tunable bandwidth. (C) 2015 AIP Publishing LLC.

引用

页数：8

共 41 条

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