Author:
Lei Chao-Jun ,Yu Sheng ,Li Hong-Fu ,Niu Xin-Jian ,Liu Ying-Hui ,Hou Shen-Yong ,Zhang Tian-Zhong , ,
Abstract
The mode competition is the problem to be solved urgently in high-order mode gyrotron. Based on the generalized theory of transmission line, a group of first order transmission line equations that can accurately describe the coupling modes in a gradually-varying cavity is studied. Through analysing the expressions of the coupling coefficients between the various modes, a gradual-varying cavity for a gyrotron is designed. It is proved that the power in spurious modes in this novel cavity may be kept far below that in the line-joint cavity. The normalized amplitudes of non-operating modes can reach -100 dB in cavity and -88.6 dB in travelling wave guide.
Publisher
Acta Physica Sinica, Chinese Physical Society and Institute of Physics, Chinese Academy of Sciences
Subject
General Physics and Astronomy
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