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Equivalent cylinder model for describing the field of a low-voltage electron gun

  • Proceedings of the XXII Russian Conference on Electron Microscopy EM-2008
  • Published:
Bulletin of the Russian Academy of Sciences: Physics Aims and scope

Abstract

Problems of electron gun operation at low voltages are discussed. The gun characteristics are analyzed within the equivalent cylinder model. A formula for the cut-off voltage is obtained. The minimum crossover size is determined by the cathode depth for low potentials in the Wehnelt bore. The dependences of the minimal crossover size on bias are plotted for different geometries.

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Authors and Affiliations

  1. Moscow State Institute of Radio Engineering Electronics and Automation, pr. Vernadskogo 78, Moscow, 119454, Russia

    O. D. Potapkin

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  1. O. D. Potapkin
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Correspondence to O. D. Potapkin.

Additional information

Original Russian Text © O.D. Potapkin, 2009, published in Izvestiya Rossiiskoi Akademii Nauk. Seriya Fizicheskaya, 2009, Vol. 73, No. 4, pp. 503–507.

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Potapkin, O.D. Equivalent cylinder model for describing the field of a low-voltage electron gun. Bull. Russ. Acad. Sci. Phys. 73, 478–481 (2009). https://doi.org/10.3103/S1062873809040091

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  • DOI: https://doi.org/10.3103/S1062873809040091

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