Threshold Currents of Vacuum Arcs With Tungsten and Copper Cathodes

P. S. Mikhailov; I. L. Muzyukin; I. V. Uimanov; D. L. Shmelev; S. A. Barengolts

doi:10.1049/hve2.70151

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Threshold Currents of Vacuum Arcs With Tungsten and Copper Cathodes

更新时间：2026-10-08

- Threshold Currents of Vacuum Arcs With Tungsten and Copper Cathodes
- High Voltage Vol. 11, Issue 4, (2026)
- 作者机构：
  
  1. Institute of Electrophysics, RAS UB, Yekaterinburg,Russia
  2. Ural Federal University, Yekaterinburg,Russia
  3. A.M. Prokhorov Institute of General Physics, RAS,Moscow,Russia
  4. .N. Lebedev Physical Institute, RAS, Moscow,P,Russia
- 作者简介：
- 基金信息：
- DOI：10.1049/hve2.70151
  CLC：
- Published：2026
- 稿件说明：
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P. S. Mikhailov, I. L. Muzyukin, I. V. Uimanov, et al. Threshold Currents of Vacuum Arcs With Tungsten and Copper Cathodes[J]. High Voltage, 2026, 11(4).
DOI：

P. S. Mikhailov, I. L. Muzyukin, I. V. Uimanov, et al. Threshold Currents of Vacuum Arcs With Tungsten and Copper Cathodes[J]. High Voltage, 2026, 11(4). DOI： 10.1049/hve2.70151.

摘要

Abstract

This paper presents the results of an experimental study aimed at determining the threshold current for triggering a vacuum arc discharge

the probability of arc ignition and the average arc operation time depending on the current for tungsten and copper electrodes. It has been shown that the cutoff current of a vacuum arc varies widely under constant experimental conditions. The threshold current for tungsten cathodes is higher than for copper ones. For both materials

there is a nonzero probability of arc ignition at currents significantly lower than the average threshold. At the same time

the exponential dependence of the average arc operation time on the current is preserved.

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