We analyze the electromagnetic field of a bunch that moves uniformly in a circular metal waveguide and crosses a boundary between a vacuum area and an area filled with an anisotropic dispersive nonmagnetic medium. The medium is characterized by the diagonal dielectric permittivity tensor with components possessing frequency dispersion of plasma types. The investigation of the waveguide mode components is performed with the methods of the complex variable function theory. It is shown that in compliance with the parameters of the medium, Cherenkov radiation (CR) generated in the filled area of the waveguide can have reversed direction in relation to the bunch motion. CR can penetrate into the vacuum area of the waveguide, that is, the intensive reversed Cherenkov-transition radiation (RCTR) can be generated. The main properties of this radiation are described, and essential differences from the RCTR in the case of isotropic left-handed medium are revealed.

中文翻译：

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部分填充各向异性色散介质的波导中的逆切伦科夫跃迁辐射


我们分析了在圆形金属波导中均匀移动并穿过真空区域和填充各向异性色散非磁性介质的区域之间的边界的束的电磁场。该介质的特征在于对角介电常数张量，其成分具有等离子体类型的频率色散。采用复变函数理论的方法对波导模式分量进行了研究。结果表明，根据介质参数，波导填充区域中产生的切伦科夫辐射 (CR) 可以具有与束团运动相关的相反方向。 CR可以穿透波导的真空区域，即可以产生强烈的逆切伦科夫跃迁辐射（RCTR）。描述了这种辐射的主要特性，并揭示了与各向同性左手介质情况下的 RCTR 的本质区别。