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Simulation of High Current Vacuum Arc with Hybrid Cathode Attachment

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Bulletin of the Russian Academy of Sciences: Physics Aims and scope

Abstract

A model of the hybrid cathode attachment of a high-current vacuum arc with a characteristic average current density at the cathode of 105–106 A/cm2, in which multiple rapidly moving cathode spots and a quasi-stationary thermal spot coexist, is proposed. The numerical simulation of the formation and expansion of a plasma jet with a hybrid cathode attachment showed that the model can explain the sharp increase in the mass of the plasma jet and cathode erosion observed in experiments on magnetic implosion. Characteristic signs of the occurrence of hybrid cathode attachment, which can be verified experimentally, are predicted.

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Funding

The research was supported by the Russian Science Foundation under grant no. 23-19-00360 (https:// rscf.ru/project/23-19-00360).

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Authors and Affiliations

  1. Institute of Electrophysics, Ural Branch, Russian Academy of Sciences, 620016, Yekaterinburg, Russia

    D. L. Shmelev & I. V. Uimanov

  2. Ural Federal University, 620002, Yekaterinburg, Russia

    D. L. Shmelev

  3. Prokhorov General Physics Institute, Russian Academy of Sciences, 119991, Moscow, Russia

    S. A. Barengolts

Authors
  1. D. L. Shmelev
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  2. S. A. Barengolts
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  3. I. V. Uimanov
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Correspondence to D. L. Shmelev.

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Shmelev, D.L., Barengolts, S.A. & Uimanov, I.V. Simulation of High Current Vacuum Arc with Hybrid Cathode Attachment. Bull. Russ. Acad. Sci. Phys. 87 (Suppl 2), S169–S174 (2023). https://doi.org/10.1134/S1062873823704567

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  • DOI: https://doi.org/10.1134/S1062873823704567

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