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Emissivity of a multibeam electron gun with a glassy carbon field-emission cathode

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Abstract

A multibeam triode electron gun with a glassy carbon field-emission cathode that is intended for an O-type microwave amplifier is studied. The electric field strength and the current density at the microtips versus the distance to the center of a cell of the cathode–grid unit are calculated. Calculation data are compared with experimental results. It is shown that about 70% of the cathode current in each cell is accounted for by microtips arranged in a circumferential ring no wider than 20 μm. The field-emission current density inside the ring exceeds 40 A/cm2, and the current per microtip equals 43.1 μA.

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Authors and Affiliations

  1. Research and Production Enterprise Almaz, ul. Panfilova 1, Saratov, 410033, Russia

    N. A. Bushuev, A. A. Nikolaev, P. D. Shalaev & V. I. Shesterkin

  2. Chernyshevskii State University, Astrakhanskaya ul. 83, Saratov, 410012, Russia

    O. E. Glukhova, D. V. Ivanov & A. S. Kolesnikova

  3. Kotel’nikov Institute of Radio Engineering and Electronics, Saratov Branch, Russian Academy of Sciences, ul. Zelenaya 38, Saratov, 410019, Russia

    Yu. A. Grigor’ev

Authors
  1. N. A. Bushuev
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  2. O. E. Glukhova
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  3. Yu. A. Grigor’ev
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  4. D. V. Ivanov
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  5. A. S. Kolesnikova
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  6. A. A. Nikolaev
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  7. P. D. Shalaev
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  8. V. I. Shesterkin
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Corresponding author

Correspondence to V. I. Shesterkin.

Additional information

Original Russian Text © N.A. Bushuev, O.E. Glukhova, Yu.A. Grigor’ev, D.V. Ivanov, A.S. Kolesnikova, A.A. Nikolaev, P.D. Shalaev, V.I. Shesterkin, 2016, published in Zhurnal Tekhnicheskoi Fiziki, 2016, Vol. 61, No. 2, pp. 134–139.

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Bushuev, N.A., Glukhova, O.E., Grigor’ev, Y.A. et al. Emissivity of a multibeam electron gun with a glassy carbon field-emission cathode. Tech. Phys. 61, 290–295 (2016). https://doi.org/10.1134/S1063784216020080

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  • DOI: https://doi.org/10.1134/S1063784216020080

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