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Current Limitations for the Axially Symmetric Hollow Electron Beam in the Drift Tubes of Millimeter-Wave Vacuum Electronic Devices

  • Radiophysics, Electronics, Acoustics
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Moscow University Physics Bulletin Aims and scope

Abstract

The conditions for ensuring the equilibrium steady-state of a high-density hollow electron beam transported in cylindrical drift tubes and focused by a uniform magnetic field are investigated. The results of numerical calculations of the currents limited due to the longitudinal deceleration of electrons by the space charge and the violation of equilibrium transverse magnetic focusing conditions when transporting beams of different configurations in klystron-type devices are presented. The limitations of the working length of the device associated with the excitation of diocotron instability are estimated. The calculation results were compared with the data obtained by the quasi-3D Arsenal—MSU computer code and by the approximate analytical formulas of other authors.

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Funding

This work was supported by the Ministry of Science and Higher Education as part of the work on the State Assignment of the Federal Research Center Crystallography and Photonics.

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Correspondence to V. Y. Rodyakin.

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Russian Text © The Author(s), 2019, published in Vestnik Moskovskogo Universiteta, Seriya 3: Fizika, Astronomiya, 2019, No. 6, pp. 41–46.

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Rodyakin, V.Y., Pikunov, V.M. & Aksenov, V.N. Current Limitations for the Axially Symmetric Hollow Electron Beam in the Drift Tubes of Millimeter-Wave Vacuum Electronic Devices. Moscow Univ. Phys. 74, 614–619 (2019). https://doi.org/10.3103/S0027134919060225

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  • DOI: https://doi.org/10.3103/S0027134919060225

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