A method of increasing the selectivity of highly-oversized open cavities is experimentally demonstrated in the electron cyclotron maser (gyrotron) operating at the second cyclotron harmonic in a high transverse mode (presumably, TE58,13) of a circular cylindrical cavity at a frequency near 1.2 THz in the magnetic field of 24 T. This method is purely electrodynamical and based on a simple deformation of the cavity wall. The proposed approach paves the way for increase of the gyrotron frequencies and for enhancing the selectivity of open cavities in other applications.

中文翻译：

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太赫兹二次谐波回旋加速器中选择性超大腔的演示

一种提高大尺寸开放腔选择性的方法在电子回旋脉泽（回旋加速器）中进行了实验证明，该电子回旋脉泽（回旋加速器）在圆柱形腔的高横向模式（可能是 TE58,13）中以接近频率的第二回旋谐波运行在 24 T 的磁场中为 1.2 THz。这种方法是纯电动的，基于空腔壁的简单变形。所提出的方法为增加回旋管频率和增强其他应用中开放腔的选择性铺平了道路。