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Influence of Perturbations in the Axial Symmetry on Formation of Helical Electron Beams in a System with the Reversed Magnetic Field

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Abstract

We perform three-dimensional numerical simulation of the electron-optical system (EOS) with the reversed magnetic field, which is designed for a large-orbit gyrotron (GBO) operated in a wide frequency range of 0.26–0.65 GHz, within the framework of a static model and analyze the influence of perturbations in the axial symmetry of electrodes and the magnetic field on the parameters of the axis-encircling electron beam. It is shown that the most significant perturbation of the parameters of the helical electron beam (HEB) is determined by the radial displacement of the cathode and the tilt of the cathode coil, which ensures the reversal of the magnetic field. Analytical estimations are presented, which allow determining the corresponding margins for the development of such systems.

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Acknowledgements

The authors are grateful to E.V. Ilyakov and A.V. Savilov for their reviewing the manuscript and providing useful comments.

Funding

This work was supported by Grant 17-19-01605 of the Russian Science Foundation.

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Authors and Affiliations

  1. Institute of Applied Physics of the Russian Academy of Sciences, 46, Ulyanov Street, Nizhny Novgorod, Russia, 603950

    Yu. K. Kalynov, V. N. Manuilov & V. Yu. Zaslavsky

  2. N.I. Lobachevsky State University of Nizhny Novgorod, 23 Gagarin Prospect, Nizhny Novgorod, Russia, 603950

    V. N. Manuilov & V. Yu. Zaslavsky

Authors
  1. Yu. K. Kalynov
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  2. V. N. Manuilov
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  3. V. Yu. Zaslavsky
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Correspondence to V. N. Manuilov.

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Kalynov, Y.K., Manuilov, V.N. & Zaslavsky, V.Y. Influence of Perturbations in the Axial Symmetry on Formation of Helical Electron Beams in a System with the Reversed Magnetic Field. J Infrared Milli Terahz Waves 39, 738–748 (2018). https://doi.org/10.1007/s10762-018-0508-0

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