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The Features of LaB6 Cathode Operation in a Technological Electron-Beam Gun

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Abstract

A problem is considered concerning the variability of the heating parameters of LaB6 disk cathodes in welding electron-beam guns, which is associated with the different emission characteristics of the cathodes and the mounting features of the main cathode. A method for preliminarily assessing the cathode quality is proposed based on plotting the curves of the emission current depending on the heating power. A technique for determining electron work function with the use of the full current method for the evaluation of the cathode-emission characteristics is considered. It is established that the heating modes and the mounting features of a main cathode made of LaB6 can exert a significant effect on the emission characteristics of the main cathode.

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Funding

This work was carried out in the framework of the project “A New-Generation Electron-Beam Gun for Technological Purposes” with the financial support of National Research University “Moscow Power Engineering Institute” via a grant for performing the programs of applied scientific research “Power Engineering”; “Electronics, radio engineering, and IT”; and “Industry 4.0 Technologies for Industry and Robotics” for 2020—2022, project no. 20/22-0000028/42.

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Authors and Affiliations

  1. National Research University “Moscow Power Engineering Institute”, 111250, Moscow, Russia

    I. S. Chulkov, A. L. Goncharov, V. K. Dragunov & I. A. Kharitonov

Authors
  1. I. S. Chulkov
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  2. A. L. Goncharov
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  3. V. K. Dragunov
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  4. I. A. Kharitonov
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Corresponding author

Correspondence to I. S. Chulkov.

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Translated by O. Polyakov

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Chulkov, I.S., Goncharov, A.L., Dragunov, V.K. et al. The Features of LaB6 Cathode Operation in a Technological Electron-Beam Gun. Russ. Electr. Engin. 92, 767–771 (2021). https://doi.org/10.3103/S1068371221120051

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  • DOI: https://doi.org/10.3103/S1068371221120051

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