Mode-Converting Corrugations for Cavities of Second-Harmonic Gyrotrons with Improved Performance
Mode-converting longitudinal corrugations are used as a means of improving the selectivity properties of cavities for second-harmonic gyrotrons. As an example, 100-kW 0.3-THz second-harmonic gyrotron is considered. For the operating second-harmonic mode and most dangerous first-harmonic competing modes, the eigenvalues, ohmic losses and beam-wave coupling coefficients are investigated with respect to dimensions of a corrugated cavity. The most optimal parameters are found for a gyrotron cavity with mode-converting corrugations, which ensure the widest range of a single mode operation for the 0.3-THz second-harmonic gyrotron. It is shown that, in this range, the gyrotron output power can be increased up to 180 kW. It is found that output mode purity of the 0.3-THz second-harmonic gyrotron falls off due to mode-converting corrugations, which induce undesirable coupling of the operating mode with neighboring Bloch harmonics in the output section of the gyrotron cavity.
R.J. Temkin, Int. J. Terahertz Sci. Technol. 7(1), 1-9 (2014), https://doi.org/10.11906/TST.001-009.2014.03.01.
M.Y. Glyavin, T. Idehara, and S.P. Sabchevski, IEEE Trans. Terahertz Sci. Technol. 5(5), 788-797 (2015), https://doi.org/10.1109/TTHZ.2015.2442836.
M. Blank, P. Borchard, S. Cauffman, K. Felch, M. Rosay, and L. Tometich, Int. J. Terahertz Sci. Technol. 7(4), 177-186 (2016), https://doi.org/10.11906/TST.177-186.2016.12.17.
M. Thumm, J. Infrared Millim. Terahertz Waves 41(1), 1-140 (2020), https://doi.org/10.1007/s10762-019-00631-y.
T. Notake, T. Saito, Y. Tatematsu, A. Fujii, S. Ogasawara, L. Agusu, I. Ogawa, T. Idehara, and V.N. Manuilov, Phys. Rev. Lett. 103(22), 225002 (2009), https://doi.org/10.1103/PhysRevLett.103.225002.
T. Saito, N. Yamada, S. Ikeuti, S. Ogasawara, Y. Tatematsu, R. Ikeda, I. Ogawa, T. Idehara, V.N. Manuilov, T. Shimozuma, S. Kubo, M. Nishiura, K. Tanaka, and K. Kawahata, Phys. Plasmas 19(6), 063106 (2012), https://doi.org/10.1063/1.4729316.
T. Saito, S. Tanaka, R. Shinbayashi, Y. Tatematsu, Y. Yamaguchi, M. Fukunari, S. Kubo, T. Shimozuma, K. Tanaka, and M. Nishiura, Plasma Fusion Res. 14, 1406104 (2019), https://doi.org/10.1585/pfr.14.1406104.
K.A. Avramides, C.T. Iatrou, and J.L. Vomvoridis, IEEE Trans. Plasma Sci. 32(3), 917-928 (2004), https://doi.org/10.1109/TPS.2004.828781.
K.A. Avramides, J.L. Vomvoridis, and C.T. Iatrou, in: AIP Conference Proceedings 807, 264-270 (2006), https://doi.org/10.1063/1.2158787.
V.I. Shcherbinin, V.I. Tkachenko, K.A. Avramidis, and J. Jelonnek, IEEE Trans. Electron Devices 66(12), 5313-5320 (2019), https://doi.org/10.1109/TED.2019.2944647.
V.I. Shcherbinin, Y.K. Moskvitina, K.A. Avramidis and J. Jelonnek, IEEE Trans. Electron Devices 67(7), 2933-2939 (2020), https://doi.org/10.1109/TED.2020.2996179.
V.I. Shcherbinin, K.A. Avramidis, M. Thumm and J. Jelonnek, J. Infrared Millim. Terahertz Waves 42(1), 93-105 (2021), https://doi.org/10.1007/s10762-020-00760-9.
T.I. Tkachova, V.I. Shcherbinin, and V.I. Tkachenko, J. Infrared Millim. Terahertz Waves 40(10), 1021-1034 (2019), https://doi.org/10.1007/s10762-019-00623-y.
T.I. Tkachova, V.I. Shcherbinin, V.I. Tkachenko, Z.C. Ioannidis, M. Thumm, and J. Jelonnek, J. Infrared Millim. Terahertz Waves 42(3), 260-274 (2021), https://doi.org/10.1007/s10762-021-00772-z.
J.B. Davies, Proc. IEE-Part C 109(15), 162-171 (1962), https://doi.org/10.1049/pi-c.1962.0022.
T. Scharten, J. Nellen, and F. van den Bogaart, Proc. IEE-Part H 128(3), 117-123 (1981), https://doi.org/10.1049/ip-h-1.1981.0019.
C.T. Iatrou, S. Kern, and A.B. Pavelyev, IEEE Trans. Microw. Theory Techn. 44(1), 56-64 (1996), https://doi.org/10.1109/22.481385.
V.I. Shcherbinin, and V.I. Tkachenko, J. Infrared Millim. Terahertz Waves 38(7), 838-852 (2017), https://doi.org/10.1007/s10762-017-0386-x.
V.I. Shcherbinin, B.A. Kochetov, A.V. Hlushchenko, and V.I. Tkachenko, IEEE Trans. Microw. Theory Techn. 67(2), 577-583 (2019), https://doi.org/10.1109/TMTT.2018.2882493.
T.I. Tkachova, V.I. Shcherbinin, and V.I. Tkachenko, in: Proc. Int. Conf. Math. Methods Electromagn. Theory (MMET’2018) (Kyiv, Ukraine, 2018), pp. 238-241, https://doi.org/10.1109/MMET.2018.8460433.
T.I. Tkachova, V.I. Shcherbinin, and V.I. Tkachenko, Problems Atomic Sci. Technol. 6(118), 67-70 (2018), http://dspace.nbuv.gov.ua/handle/123456789/148829.
T.I. Tkachova, V.I. Shcherbinin, and V.I. Tkachenko, Problems Atomic Sci. Technol. 4(122), 31-34 (2019).
V.I. Shcherbinin, A.V. Hlushchenko, A.V. Maksimenko, and V.I. Tkachenko, IEEE Trans. Electron Devices 64(9), 3898-3903 (2017), https://doi.org/10.1109/TED.2017.2730252.
Copyright (c) 2021 Tetiana Tkachova, Vitalii Shcherbinin, Viktor Tkachenko
This work is licensed under a Creative Commons Attribution 4.0 International License.
Authors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).