Study on the mode suppression of a high-order mode gyrotron

被引：0

作者：

Lei, Chao-Jun ^{[1
,2
]}

Liu, Ying-Hui ^{[1
]}

Yu, Sheng ^{[1
]}

Li, Hong-Fu ^{[1
]}

Zhao, Qi-Xiang ^{[1
]}

机构：

[1] Terahertz Science and Technology Research Center, University of Electronics Science and Technology of China, Chengdu

[2] The Chinese People's Armed Police Force Academy, Langfang, 065000, Hebei

来源：

Dianzi Keji Daxue Xuebao/Journal of the University of Electronic Science and Technology of China | 2015年 / 44卷 / 05期

关键词：

Efficiency; Gyrotron; High-order mode; Suppression; Terahertz;

D O I：

10.3969/j.issn.1001-0548.2015.05.010

中图分类号：

学科分类号：

摘要：

High-order mode gyrotron oscillators are promising sources of the high power of millimeter wave and sub-millimeter wave electromagnetic radiation. The characters of the high-order mode gyrotron are affected by the intense mode competition. The competition modes in the gyrotron are divided into the modes with the same number of an azimuthal index and the modes with the different number of an azimuthal index, which are called the parasitic modes and the transient modes respectively in this paper. The methods of the mode suppression are discussed when the TE32,5 mode is regarded as the operating mode of a 0.4 THz high-order mode gyrotron. The parasitic modes can be suppressed efficiently by designing a gradually tapered cavity. Though studying the beam-wave coupling coefficient and the start currents of the relative modes, and then selecting the operating mode carefully, the transient modes can be avoided by putting up properly the parameters of the electron beam: the beam voltage, beam current, pitch factor and beam radius of the guiding center. ©, 2015, Univ. of Electronic Science and Technology of China. All right reserved.

引用

页码：695 / 699

页数：4

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