Journal
JOURNAL OF INFRARED MILLIMETER AND TERAHERTZ WAVES
Volume 43, Issue 1-2, Pages 1-47Publisher
SPRINGER
DOI: 10.1007/s10762-022-00845-7
Keywords
Gyrotron; THz gyrotrons; Mode interaction; Mode competition; Multimode operation; Mode selection; Advanced gyrotron concepts
Funding
- [0030-2021-0001]
- [0030-2021-0027]
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The study of mode interaction in gyrotrons is important for understanding the physical principles and optimizing gyro-devices. With advancements in terahertz frequencies, the competition between modes has become pronounced. This overview presents the evolution and progress of these investigations, supporting the development of high-performance gyrotrons for emerging applications.
The studies on mode interaction in gyrotrons had always been an active field of research due to their theoretical and practical importance for better understanding of the underlying physical principles and the development and optimization of various gyro-devices. However, lately, the problems that stem from the mode interaction have become more pronounced and severe due to the recently demonstrated advancement of gyrotrons towards higher (terahertz) frequencies at which, for keeping the same power level, the gyrotrons should operate in higher order modes. So the mode spectrum of the gyrotron cavity is significantly denser, and, hence, the mode competition is inevitable. In this overview, we present both the evolution and the progress of these investigations that assist the further development of high-performance sub-THz and THz gyrotrons for numerous novel and emerging applications in the broad fields of science and technologies. The targeted readership of this paper includes not only the experts in gyrotron development but rather a wider community of specialists working on other vacuum microwave devices seeking a synergy between different research fields.
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