强激光与粒子束, 2004, 16 (7): 918, 网络出版: 2006-05-15   

螺旋线行波管返波自激振荡的研究

Study of suppressing backward-wave oscillation in a helix traveling wave tube
作者单位
1 电子科技大学,物理电子学院,大功率微波国家重点实验室,四川,成都,610054
2 四川大学,应用物理系,四川,成都,610065
摘要
在2维小信号模型的基础上,分析了均匀和周期永久聚焦磁场对抑制返波自激振荡的影响.研究结果表明:改变聚焦磁场的幅值或周期来增加起振长度是可能的, 而且不会改变基波的互作用条件.与此同时,对起振长度、初始非同步速度参量随皮尔斯增益参量、空间电荷参量、损耗参量等的变化,以及在超宽带行波管中当存在两个或多个角向非对称空间谐波时,起振长度、初始非同步速度参量随周期永久聚焦磁场的变化进行了研究.优化设计聚焦磁场、电子注和螺旋线慢波系统的参量可以对螺旋线行波管的稳定性分析提供必要的依据.
Abstract
The influence of uniform magnetic field or PPM(periodic permanent magnetic) field on suppressing BWO(back-wave oscillation) is analyzed on the basis of the 2-D small signal model. It shows that it is possible to increase the start oscillation length by tailoring magnetic field's amplitude and its period without changing the synchronous condition of the fundamental wave;in the meantime, when there are two or more azimuthally asymmetric space harmonics in the high power broad-band helix TWT(traveling wave tube), the influences of the Pierce's gain parameter, space charge parameter, and loss parameter on the start oscillation length and real starting asynchronous velocity parameter are also analyzed. Thus the optimum values of the focusing magnetic field, electron beam and helical slow wave system can be obtained. The theory presented here can provide a strong basis for design of the helix TWT.
参考文献

[1] Johnson H R.Backward-wave oscillators[A].Proc IRE[C].1955.684-697.

[2] Haddad G I,Bevensee R M.Start-oscillation of tapered backward-wave oscillators[J].IEEE Transaction on ED,1963,10:389-393.

[3] Haddad G I,Rowe J E.Efficiency of tapered backward-wave oscillators[J].IEEE Transaction on ED,1964,11:20-30.

[4] Haddad G I,Rowe J E.Start-oscillation conditions in nonuniform backward wave oscillators [J].IEEE Transaction on ED,1964.11:31-37.

[5] Nilsson B O,hagstr Zm C E.A two-wave theory of traveling-wave tubes and backward-wave oscillators[J].IEEE Transaction on ED,1975,22:869-880.

[6] 杨金生,张金玲,陈庆有,等.提高行波管的返波起振电流[J].电子学报,2000,28(12):102-104.
Yang J S,Zhang J L,Chen Q Y,et al.How to enhance the start oscillation current of the backward-wave in a TWT.Acta Electroinica Sinica,2000,28(12):102-104.

[7] Sangster A J,Swan A,Livingston E P.Backward-wave suppression in a very wide-band helix traveling-wave tube using a slow waveguide filter[A].IEE Proceedings-H[C].1991,138:79-85.

[8] Belyavskiy E D,Goncharov I A,Martynyuk A E.et al.Backward-wave self-excitation of the magnetically focused helix traveling wave tube[J].Electronnaya Technika Ser I,Electronika SVCh,1974,3:60-65.

[9] Belyavskiy E D,Goncharov I A,Martynyuk A E,et al.Two-dimensional small-signal Analysis of Backward-wave oscillation in a helix traveling-wave tube under Brillouin-flow,periodic permanent magnetic focusing[J].IEEE Transactions on ED,2001,48(8):1727-1736.

[10] Branch G M,Mihran T G.Plasma frequency reduction factors in electron Beams[J].IRE Transactions -Electron Devices,1955,2(2):3-11.

[11] 段兆云,宫玉彬,王文祥,等.考虑螺旋带径向厚度的螺旋线慢波系统的研究[J].强激光与粒子束,2002,14(6):905-910.
Duan Z Y,Gong Y B,Wang W X,et al.Study of helix slow wave structure take the radial thickness into account.High Power Laser and Particle Beams,2002,14(6):905-910.

段兆云, 宫玉彬, 王文祥, 唐昌建, 魏彦玉, 黄民智. 螺旋线行波管返波自激振荡的研究[J]. 强激光与粒子束, 2004, 16(7): 918. DUAN Zhao-yun, GONG Yu-bin, WANG Wen-xiang, TANG Cang-jian, WEI Yan-yu, HUANG Min-zhi. Study of suppressing backward-wave oscillation in a helix traveling wave tube[J]. High Power Laser and Particle Beams, 2004, 16(7): 918.

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