A Novel Complex Cavity for Second-Harmonic Subterahertz Gyrotrons: a Tradeoff Between Engineering Tolerance and Mode Selection

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...

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Bibliographic Details
Published in:Journal of infrared, millimeter and terahertz waves millimeter and terahertz waves, 2022-12, Vol.43 (11-12), p.957-971
Main Authors: Shcherbinin, Vitalii I., Tkachova, Tetiana I., Maksimenko, Aleksandr V., Thumm, Manfred, Jelonnek, John
Format: Article
Language:English
Subjects:
Cavity resonators
Classical Electrodynamics
Cyclotron resonance devices
Electrical Engineering
Electronics and Microelectronics
Engineering
Errors
Instrumentation
Manufacturing
Modal choice
Performance evaluation
Quantitative analysis
Radiation
Tradeoffs
Wave interaction
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Summary: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.
ISSN:1866-6892
1866-6906
DOI:10.1007/s10762-022-00888-w