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Optimization of the Magnetron-Injection Gun for a High-Power Planar Millimeter-Wave Gyrotron

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Radiophysics and Quantum Electronics Aims and scope

We have developed a method for optimization of a planar magnetron-injection gun (MIG) with allowance for the three-dimensional configuration of the electron-optical system and the electron drift in crossed fields, which is transverse to the direction of the translational beam propagation direction. Recommendations are given on how to minimize the spread of transverse velocities with retaining the pitch factor, which is acceptable for efficient electron-wave interaction. The influence of roughness of the emission surface on the parameters and the operation regime of the planar MIG is studied. The optimal electrode configurations of a planar MIG have been found for a gyrotron with an operating frequency of 140 GHz at the first cyclotron-frequency harmonic with an accelerating voltage of 50 kV, a current of 30 A, and a magnetic-field compression of 36. These confirm good electric strength of the gun and manufacturability of the design of the planar electron-optical system. The obtained calculated distribution of the transverse velocities in a ribbon helical electron beam ensures the possibility of selective excitation of the high-order working mode TE11, 1 of a planar electrodynamic system and an output radiation power of several hundreds of kilowatts.

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Authors and Affiliations

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

    V. N. Manuilov, V. Yu. Zaslavsky, A. N. Kuftin & K.A. Leshcheva

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

    V. N. Manuilov, V. Yu. Zaslavsky & K.A. Leshcheva

Authors
  1. V. N. Manuilov
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  2. V. Yu. Zaslavsky
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  3. A. N. Kuftin
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  4. K.A. Leshcheva
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Corresponding author

Correspondence to V. Yu. Zaslavsky.

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Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika, Vol. 64, No. 4, pp. 253–264, April 2021. Russian DOI: 10.52452/00213462_2021_64_04_253

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Manuilov, V.N., Zaslavsky, V.Y., Kuftin, A.N. et al. Optimization of the Magnetron-Injection Gun for a High-Power Planar Millimeter-Wave Gyrotron. Radiophys Quantum El 64, 229–239 (2021). https://doi.org/10.1007/s11141-021-10126-3

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  • DOI: https://doi.org/10.1007/s11141-021-10126-3

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