J. R. Sirigiri, M. A. Shapiro
We present the design and experimental results of a novel quasioptical gyrotron traveling-wave tube (gyro-TWT) amplifier at 140 GHz. The gyro-TWT produced up to 30 kW of peak power in 2/0.0022s pulsed operation at 6 Hz achieving a peak gain of 29 dB, a peak efficiency of 12%, and a bandwidth of 2.3 GHz. The device was operated in a very higher-order mode of an open quasioptical interaction structure, namely, a confocal waveguide. The diffraction loss from the open sidewalls of the confocal waveguide was used to suppress mode competition in this highly overmoded circuit resulting in a stable single-mode operation. The experiment achieved record high power levels at 140 GHz for a gyro-TWT. These experiments demonstrate the effectiveness of using overmoded quasioptical waveguide interaction structures for generating high power in the millimeter and submillimeter wave bands with a gyro-TWT.
@article{36ddb484-a67e-49bd-9e41-dcd664e8b790,
title={High Power 140 GHz Quasioptical Gyrotron},
author={J. R. Sirigiri and M. A. Shapiro},
year={2026},
language={en}
}TY - JOUR TI - High Power 140 GHz Quasioptical Gyrotron AU - J. R. Sirigiri AU - M. A. Shapiro PY - 2026 LA - en ER -
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