Large ohmic losses in the cavities of terahertz gyrotrons may lead to the overlapping of the axial mode spectra. In a number of gyrotron experiments, this effect has been used to provide a fairly broadband frequency tuning by changing appropriately the operating magnetic field and/or accelerating voltage of the gyrotron. Similar to the systems with nonfixed axial structure of the RF electromagnetic field and low diffraction quality, which are due to weak reflections of the operating wave from the collector end of the electrodynamic system, this changing leads to a monotonic change in the axial index of the operating wave and transition from the gyrotron regime to the gyro-BWO regime. According to a theoretical comparison of these two methods performed on the basis of generalization of self-consistent gyrotron equations with allowance for variations in the axial electron momenta, low-reflection systems can provide a higher efficiency and monotonicity of the frequency tuning.
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E.A.Nanni, A.B.Barnes, R.G.Griffin, and R. J.Temkin, IEEE Trans. THz Sci. Tech., 1, No. 1, 145 (2011).
R. G. Griffin and T. F. Prisner, Phys. Chem., 12, No. 22, 5737 (2010).
V. Bratman, M. Glyavin, T. Idehara, et al., IEEE Trans. Plasma Sci., 36, No. 1, 36 (2008).
V. L. Bratman, M.Yu.Glyavin, Yu.K.Kalynov, et al., Int. J. IR MM THz Waves, 32, No. 3, 371 (2011).
V. L. Bratman, A. G. Litvak, and E. V. Suvorov, Phys. Usp., 54, No. 8, 837 (2011).
G.Ya. Levin, A. I.Borodkin, A.Ya.Kirichenko, et al., Clinotron [in Russian], Naukova Dumka, Kiev (1992).
V. L.Bratman, B. S.Dumesh, and A. E.Fedotov, IEEE Trans. Plasma Sci., 38, No. 6, 1466 (2010).
B. Steer, A.Roitman, P.Horoyski, et al., Extended-Interaction Klystron Technology at Millimeter and Submillimeter Wavelengths; http://www.cpii.com/docs/related/40/EIK.
M.K. Hornstein, V. S. Bajaj, R. G. Griffin, et al., IEEE Trans. Electron. Devices, 52, 798 (2010).
T. H.Chang, C.T. Fan, K. F. Pao, et al., Appl. Phys. Lett., 90, 191501 (2007).
A. C.Torrezan, H. Seo-Tae, M.A. Shapiro, et al., Proc. 33rd Int. Conf. on Infrared, Millimeter and Terahertz Waves, Pasadena, September 15–19, 2008, p. 1.
T. H.Chang, T. Idehara, I.Ogawa, et al., J. Appl. Phys., 105, 063304 (2009).
A.C.Torrezan, M. A. Shapiro, J.R. Sirigiri, et al., IEEE Trans. Electron Devices, 58, No. 8, 2777 (2011).
V. L. Bratman. M. A. Moiseev, M. I. Petelin, and R. ´E. Erm, Radiophys. Quantum Electron., 16, No. 4, 474 (1973).
V. L. Bratman, Radiophys. Quantum Electron., 17, No. 10, 1181 (1974).
V. L. Bratman and M. A. Moiseev, Radiophys. Quantum Electron., 18, No. 7, 772 (1975).
V. L. Bratman, S. L. Novozhilov, and M. I.Petelin, ´ Elektronnaya Tekhnika, Ser. 1, No. 11, 46 (1976).
V. L. Bratman, M. A. Moiseev, and M. I. Petelin, Gyrotrons [in Russian], Inst. Appl. Phys. SSSR, Gorky (1981), p. 122.
N. A. Zavol’sky, V.E. Zapevalov, M.A.Moiseev, and A. S. Sedov, in Proc. XV Sci. Conf. Radiophys. Dedicated to the 110th Anniversary of A.A.Andronov’s Birthday, May 10–13, 2011 [in Russian], NNSU, Nizhny Novgorod, (2011), p. 43.
E. V. Blokhina, Complex dynamic regimes in distributed systems of the electron flux–electromagnetic wave type with a nonfixed field structure [in Russian], Ph.D. Thesis (phys.& math), Saratov (2005).
S. N. Vlasov, G. M. Zhislin, I.M.Orlova, et al., Radiophys. Quantum Electron., 12, No. 8, 972 (1969).
B. Z.Katsenelenbaum, Theory of Nonregular Waveguides with Slowly Varying Parameters [in Russian], Akad. Nauk SSSR, Moscow (1961).
V. L.Bratman, N. S.Ginzburg, G. S.Nusinovich, et al., Int. J. Electron., 51, 541 (1981).
N. S.Ginzburg, G. S.Nusinovich, and N.A. Zavolsky, Int. J. Electron., 61, 881 (1986).
V. E. Zapevalov, M. A. Moiseev, and N. A. Zavolsky, in: Proc. 38th Int. Conf. Infrared, Millimeter, and Terahertz Waves, IRMMW-THz, 1–6 September 2013, Mainz, Germany, 6665709.
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Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika, Vol. 58, No. 9, pp. 732–746, September 2015.
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Bratman, V.L., Savilov, A.V. & Chang, T.H. Possibilities for Continuous Frequency Tuning in Terahertz Gyrotrons with Nontunable Electrodynamic Systems. Radiophys Quantum El 58, 660–672 (2016). https://doi.org/10.1007/s11141-016-9638-1
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DOI: https://doi.org/10.1007/s11141-016-9638-1