@article{677a58ded59449b8abe9c5ae777d5eeb,
title = "The effects of electron cyclotron absorption in powerful narrow-band sub-THz oscillators exploiting volume and surface modes",
abstract = "We present the theory, design and numerical modeling of novel, pulsed sub-THz oscillators based on cylindrical, two-dimensional (2D) periodic surface lattice (PSL) interaction cavities. Investigation of the electronic efficiency and power dependence on the magnitude of the magnetic guide field and the electron beam current is investigated. While cyclotron absorption effects have been studied in low order, 1D BWOs, few studies have considered cyclotron absorption in highly overmoded, 2D-PSL oscillators. Here we investigate certain behavior associated with cyclotron absorption in 2D-PSL devices with over 400 modes. This electron cyclotron absorption is shown to be a universal process, independent of frequency and transverse cavity size. Dispersive behavior shows minimal group velocity at the point of interaction and demonstrates similarities with degenerate band edge phenomena. In this work, the fundamental mode selection mechanism relies on the coupling of high-order volume and surface waves. Good agreement between theory and modeling is presented.",
keywords = "Cherenkov, electron beam, mm-wave, mode coupling, periodic structure, cyclotron absorption, radiation source, terahertz",
author = "MacLachlan, {A. J.} and Robertson, {C. W.} and Cross, {A. W.} and Phelps, {A. D. R.}",
note = "{\textcopyright} 2023 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.",
year = "2023",
month = feb,
day = "20",
doi = "10.1109/TED.2023.3244160",
language = "English",
journal = "IEEE Transactions on Electron Devices",
issn = "0018-9383",
}