E. M. Choi, C. D. Marchewka
This study reports experimental results from a 110 GHz gyrotron oscillator at the Massachusetts Institute of Technology, achieving an output power of 1.67 MW with an efficiency of 42% when operated at 97 kV and 41 A for 3 seconds in the TE22,6 mode. The results represent a significant enhancement over an earlier cavity design, which produced 1.43 MW of power at 37% efficiency. The improvements in performance are attributed to a cavity redesign featuring a reduced output taper angle and lower ohmic loss, which effectively minimized competition with the nearby TE19,7 mode. Experimental findings align well with a theoretical analysis based on starting current simulations, confirming that reduced mode competition plays a key role in the enhanced efficiency. These advancements are expected to facilitate the development of long pulse and continuous wave (CW) versions of the 110 GHz gyrotron, which could be pivotal for applications in electron cyclotron heating and current drive in magnetically confined plasma experiments.
@article{f5298e8f-2492-424f-89d7-714a12bafb7e,
title={Experimental results for a 1 5 MW 110 GH},
author={E. M. Choi and C. D. Marchewka},
year={2026},
language={en}
}TY - JOUR TI - Experimental results for a 1 5 MW 110 GH AU - E. M. Choi AU - C. D. Marchewka PY - 2026 LA - en ER -
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