Terahertz radiation from electrons moving through a waveguide with variable radius, based on Smith-Purcell and Cherenkov mechanisms. Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms Volume 309, 201

In this work we suggest as a source of terahertz radiation a waveguide - dielectric pipe with periodic internal radius and electrons moving through it. The resulting radiation is the sum of Cherenkov and Smith-Purcell ones. The intensities of radiation from the dielectric pipe with periodic internal radius and with the constant one are compared. It is shown that the radiation from periodic internal structure may be several times more intensive than that from usual pipe with the smooth internal surface. Also, the spectral-angular distribution of radiation is shown to oscillate with the radius of the waveguide, both for periodically changed and for straight internal channel. © 2013 Elsevier B.V. All rights reserved.
Author keywords
Cherenkov radiation; Dielectric waveguide; Smith-Purcell effect; Terahertz radiation
Indexed keywords
Cherenkov mechanisms; Cherenkov radiations; Internal channel; Internal structure; Internal surfaces; Smith-Purcell effect; Spectral-angular distribution; Terahertz radiation