部分填充共振色散介质的波导中的切伦科夫跃迁辐射

Physical Review Special Topics-accelerators and Beams Pub Date : 2015-09-30 DOI:10.1103/PHYSREVSTAB.18.091302

T. Alekhina, A. Tyukhtin, A. A. Grigoreva

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引用次数: 7

摘要

我们分析了带电粒子在圆波导中均匀运动并穿过具有谐振型频散的介电介质和真空区域之间的边界的电磁场。对波导模分量进行了分析和数值研究。结果表明，切伦科夫辐射(CR)可以穿透边界，切伦科夫跃迁辐射(CTR)可以在真空区激发。得到了产生这种效应的条件。结果表明，CTR可以由单模组成(而非色散介质中的CTR是多模)。在广泛的参数范围内，CTR的振幅与CR的振幅相当。所考虑的效应可以用来产生强烈的准单色辐射。

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Cherenkov-transition radiation in a waveguide partly filled with a resonance dispersion medium

We analyze the electromagnetic field of a charged particle that uniformly moves in a circular waveguide and crosses a boundary between a dielectric medium, which possesses frequency dispersion of a resonant type, and a vacuum area. The investigation of the waveguide mode components is analytically and numerically performed. It is shown that Cherenkov radiation (CR) can penetrate through the boundary, and Cherenkov-transition radiation (CTR) can be excited in the vacuum region. The conditions for this effect are obtained. It is shown that the CTR can be composed of a single mode (compared with the CTR in a nondispersive dielectric, which is multimode). The amplitude of the CTR is comparable to the amplitude of CR in an extensive range of parameters. The considered effect can be used to generate intense quasimonochromatic radiation.

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来源期刊

Physical Review Special Topics-accelerators and Beams 物理-物理：核物理

自引率

0.00%

发文量

审稿时长

3-8 weeks

期刊介绍： Physical Review Special Topics - Accelerators and Beams (PRST-AB), is a peer reviewed, purely electronic journal, distributed without charge to readers and funded by contributions from national laboratories. It covers the full range of accelerator science and technology: subsystem and component technologies, beam dynamics; accelerator applications; and design, operation, and improvement of accelerators used in science and industry. This includes accelerators for high-energy and nuclear physics, synchrotron radiation production, spallation neutron sources, medical therapy, and intense beam applications.