The coaxial cavity can rarefy the mode spectrum and restrain the mode competition, which is beneficial to the mode selection of high-frequency and high-power gyrotron. However, the misaligned insert would result in frequency shift and a decrease in interaction efficiency. Besides, the ohmic loss on the cavity walls would become uneven, which deteriorates the long pulse operation of the gyrotron. In this article, the effects of the insert structural parameters on the characteristics of the cavity, the beam–wave interaction, and the ohmic loss distribution on the cavity walls in a coaxial cavity with a small misalignment of insert are discussed. An optimal design of coaxial resonator is presented to reduce the influence of a slightly misaligned insert on the output characteristics of the resonator.

中文翻译：

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带有未对准插入件的同轴回旋管腔分析

同轴腔可以使模谱变稀，抑制模竞争，有利于高频大功率回旋管的模态选择。然而，未对准的插入物会导致频移和交互效率的降低。此外，腔壁上的欧姆损耗会变得不均匀，这会恶化回旋管的长脉冲操作。在本文中，讨论了插入件结构参数对腔体特性的影响、波束相互作用以及插入件未对准的同轴腔体中腔壁上的欧姆损耗分布。提出了一种同轴谐振器的优化设计，以减少略微未对准的插入件对谐振器输出特性的影响。