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Influence of the Foucault Currents on Excitation of the Magnetic Field and Dynamics of Formation of Helical Electron Beams in Pulse Gyrotrons

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Radiophysics and Quantum Electronics Aims and scope

We have developed a method for calculation of the pulsed magnetic field in a sophisticated system of solenoids powered by time-shifted current pulses. The method served as the basis for analysis of the temporal dynamics of magnetic-field variations both in the region of formation of the helical electron beam, and in the space of its interaction with the microwave field in a relativistic gyrotron. It is shown that at some time instants, the degree of the field nonuniformity in the operating space of the gyrotron can reach 20%. The time interval is found, during which the magnetic field in the cavity is uniform. In the experimental process, this allows one to determine the time instant at which a high-voltage pulse is fed in for generation of microwave radiation. The calculated distributions of the magnetic field are compared with the experimental data. We have also developed a method for calculation of the time evolution of the parameters of a helical electron beam formed by a magnetron-injection gun with a pulsed magnetic field, calculated the velocity distribution in the electron beam, and found the time interval, during which a beam with the parameters acceptable for generation is formed.

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Authors and Affiliations

  1. Institute of Applied Physics of the Russian Academy of Sciences, Nizhny Novgorod, Russia

    V. N. Manuilov, P. D. Likhterova, E. V. Ilyakov, I. S. Kulagin & V. Yu. Zaslavsky

  2. N. I. Lobachevsky Nizhny Novgorod State University, Nizhny Novgorod, Russia

    V. N. Manuilov, P. D. Likhterova & V. Yu. Zaslavsky

Authors
  1. V. N. Manuilov
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  2. P. D. Likhterova
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  3. E. V. Ilyakov
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  4. I. S. Kulagin
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  5. V. Yu. Zaslavsky
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Correspondence to P. D. Likhterova.

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Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika, Vol. 65, Nos. 5–6, pp. 465–474, May–June 2022. Russian DOI: https://doi.org/10.52452/00213462_2022_65_05_465

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Manuilov, V.N., Likhterova, P.D., Ilyakov, E.V. et al. Influence of the Foucault Currents on Excitation of the Magnetic Field and Dynamics of Formation of Helical Electron Beams in Pulse Gyrotrons. Radiophys Quantum El 65, 425–433 (2022). https://doi.org/10.1007/s11141-023-10224-4

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  • DOI: https://doi.org/10.1007/s11141-023-10224-4

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