The narrow-band resonance in two-layer metallic round tube

TL;DR

This paper investigates narrow-band resonance in a two-layer circular waveguide caused by a moving particle bunch, exploring its properties, potential applications in terahertz radiation, and proposing an experimental setup.

Contribution

It establishes the connection between narrow-band resonance and the synchronous TM01 mode in a two-layer waveguide, with analytical and numerical analysis of wake functions.

Findings

Resonance linked to the synchronous TM01 mode.

Potential for terahertz radiation source.

Feasibility for two-beam acceleration devices.

Abstract

The regularities of narrow-band resonance in a two-layer circular waveguide due to the radiation of the bunch, moving along its axis are investigated. Its connection with the synchronous component of a two-layer TM01 mode of the waveguide is established. Also performed numerical and analytical calculations of wake functions (particle radiation fields) and are investigated its properties. The possibility of using a two-layer waveguide as a powerful source of quasi-monochromatic terahertz radiation and as an efficient device for the two-beam acceleration is shown. Preliminary experimental scheme is proposed.