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Double-Layer Slit Cavities for Wideband Frequency Tuning in Terahertz Gyrotrons

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Abstract

We propose a new type of a gyrotron cavity comprising the external and internal cylindrical resonators with azimuthally periodical axial slits. A theory of such a cavity is presented together with the eigenmode computation, which confirms its high mode selectivity. In 3D simulations using the particle-in-cells method, we compare the output characteristics of 0.5 THz gyrotrons with 0.1 to 1 kW output power. We demonstrate that as compared to a conventional solid wall cavity, the use of the novel-type cavity allows the smooth frequency tuning band to be increased by an order of magnitude and more.

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Funding

This work was supported by the Institute of Applied Physics of the Russian Academy of Sciences (IAP RAS) Project through the Program “Development of engineering, technology and scientific research in the field of atomic energy until 2024” under Grant 0030–2021-0027.

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Authors and Affiliations

  1. Institute of Applied Physics RAS, Niznhy Novgorod, Russia

    R. M. Rozental, Yu. Yu. Danilov, A. N. Leontyev, A. M. Malkin & D. Yu. Shchegolkov

  2. Laboratory of Intensive Millimeter Wave Sources, Nizhny Novgorod State University, Nizhny Novgorod, Russia

    R. M. Rozental

  3. Advanced School of General and Applied Physics, Nizhny Novgorod State University, Nizhny Novgorod, Russia

    A. M. Malkin

  4. Moscow Engineering Physics Institute, Moscow, Russia

    V. P. Tarakanov

  5. Joint Institute for High Temperatures RAS, Moscow, Russia

    V. P. Tarakanov

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  1. R. M. Rozental
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Rozental, R.M., Danilov, Y.Y., Leontyev, A.N. et al. Double-Layer Slit Cavities for Wideband Frequency Tuning in Terahertz Gyrotrons. J Infrared Milli Terahz Waves 43, 654–669 (2022). https://doi.org/10.1007/s10762-022-00876-0

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