Abstract
Using a simplified approach, a self-consistent modeling of beam–wave interaction in a complex cavity is performed to evaluate the performance of the complex cavity second-harmonic 0.4-THz gyrotron developed at the University of Fukui. For this gyrotron, the quantitative analysis of an adverse effect of small manufacturing errors of the complex cavity on mode selection, output power, and output mode purity is done. To improve the robustness of gyrotron operation to manufacturing errors, a novel complex cavity formed by coupled smooth-walled and corrugated cylindrical resonators is considered. The novel cavity is a hybrid between conventional cylindrical and standard complex cavities and therefore offers the benefit of a tradeoff between engineering tolerance and mode selection.
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Acknowledgements
The work of V. I. Shcherbinin was supported by the Alexander von Humboldt Foundation via the Georg Forster Research Fellowship for Experienced Researchers and Philipp Schwartz Initiative for Researchers at Risk. The work of T. I. Tkachova and A. V. Maksimenko was supported by the Grant of the National Academy of Sciences of Ukraine to Research Laboratories/Groups of Young Scientists of the National Academy of Sciences of Ukraine for Conducting Research in Priority Areas of Science and Technology in 2022–2023.
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Partial financial support was received from the Alexander von Humboldt Foundation and the National Academy of Sciences of Ukraine.
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All authors contributed to the study conception and design. Material preparation, data collection, and analysis were performed by Vitalii I. Shcherbinin. The first draft of the manuscript was written by Vitalii I. Shcherbinin, and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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Shcherbinin, V.I., Tkachova, T.I., Maksimenko, A.V. et al. A Novel Complex Cavity for Second-Harmonic Subterahertz Gyrotrons: a Tradeoff Between Engineering Tolerance and Mode Selection. J Infrared Milli Terahz Waves 43, 957–971 (2022). https://doi.org/10.1007/s10762-022-00888-w
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DOI: https://doi.org/10.1007/s10762-022-00888-w