Nonlinearly driven oscillations in the gyrotron traveling-wave amplifier

被引：3
|
作者：
Chiu, C. C. [1 ]
Pao, K. F. [1 ]
Yan, Y. C. [1 ]
Chu, K. R. [1 ]
Barnett, L. R. [2 ]
Luhmann, N. C. [2 ]
机构：
[1] Natl Tsing Hua Univ, Dept Phys, Hsinchu, Taiwan
[2] Univ Calif Davis, Dept Appl Sci, Davis, CA 95616 USA
来源：
PHYSICS OF PLASMAS | 2008年 / 15卷 / 12期
关键词：
gyrotrons; plasma nonlinear processes; plasma oscillations; travelling wave amplifiers; travelling wave tubes;
D O I：
10.1063/1.3050073
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：
By delivering unprecedented power and gain, the gyrotron traveling-wave amplifier (gyro-TWT) offers great promise for advanced millimeter wave radars. However, the underlying physics of this complex nonlinear system is yet to be fully elucidated. Here, we report a new phenomenon in the form of nonlinearly driven oscillations. A zero-drive stable gyro-TWT is shown to be susceptible to a considerably reduced dynamic range at the band edge, followed by a sudden transition into driven oscillations and then a hysteresis effect. An analysis of this unexpected behavior and its physical interpretation are presented.
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页数：4
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