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Dispersion in dielectric-lined waveguides designed for terahertz-driven deflection of electron beams

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Article number144102
<mark>Journal publication date</mark>5/04/2021
<mark>Journal</mark>Applied Physics Letters
Issue number14
Volume118
Number of pages5
Publication StatusPublished
<mark>Original language</mark>English

Abstract

We have developed dielectric-lined rectangular waveguide structures for terahertz (THz)-driven ultrafast deflection of 100 keV electron beams. The structures were designed to achieve THz phase velocity matching with co-propagating electron bunches. The phase-matching capability was experimentally confirmed through time-frequency analysis of the broadband coherent THz transmission measured by electro-optic sampling. The analysis determined both the frequency-dependent propagation constants in the electron interaction region and the propagation characteristics of the integrated THz tapered coupler. © 2021 Author(s).