@inproceedings{1f10a8204d3f4c9080af69ba04da0e45,
title = "Quasi-optical output for a high gain, broadband W-band amplifier",
abstract = "The gyrotron-traveling wave amplifier (gyro-TWA), operating in W-band has previously been shown to provide an unsaturated output power of 3.4 kW over a 3-dB bandwidth of 9196.5 GHz in single pulse (350 ns) operation. The output section of the gyro-TWA was critical to maintaining the amplifier stability due to the 37 dB gain from a single gain section. This paper presents the re-design of the gyro-TWA output section suitable for several percent duty cycle and wideband operation over 90-100 GHz. We describe the design of the: wideband smooth output feedhorn, which couples to a fundamental Gaussian mode; the electron beam collector (forming part of the output horn), and the vacuum window. The feedhorn simulations predict a calculated >98% Gaussian efficiency and better than -30 dB return loss. The vacuum window is a multilayer design comprising three window discs: two quartz and one alumina. The predicted return loss is lower than -30 dB over the operating range.",
author = "Donaldson, {C. R.} and Smith, {G. M.} and Robertson, {D. A.} and Robertson, {C. W.} and L. Zhang and P. MacInnes and Whyte, {C. G.}",
note = "Publisher Copyright: {\textcopyright} 2022 IEEE.; 47th International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2022 ; Conference date: 28-08-2022 Through 02-09-2022",
year = "2022",
month = sep,
day = "26",
doi = "10.1109/IRMMW-THz50927.2022.9895885",
language = "English",
series = "International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz",
publisher = "IEEE Computer Society",
booktitle = "IRMMW-THz 2022 - 47th International Conference on Infrared, Millimeter and Terahertz Waves",
address = "United States",
}