Diffraction of a Waveguide Mode at the Transverse Boundary of Magnetized Plasma

TL;DR

This paper develops a comprehensive theory describing how waveguide modes transform at the boundary between magnetized plasma and vacuum, with applications to plasma-based radiation phenomena.

Contribution

It introduces a general theoretical framework for mode diffraction at plasma boundaries, applicable to Cherenkov radiation in plasma and isotropic media.

Findings

Derived explicit mode transformation formulas.

Applicable to narrow-band Cherenkov radiation.

Provides insights into wave behavior at plasma boundaries.

Abstract

Here we develop a general theory of mode transformation (diffraction) at the flat transverse boundary between cold magnetized electron plasma and isotropic vacuum-like medium inside a circular waveguide. The obtained results can be also directly applied to the narrow-band Cherenkov radiation generated in plasma (or in isotropic medium) by a moving charged particle bunch.