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<p>We consider the dependence of the conditions of electron runaway in the gas gap on the degree of inhomogeneity of the electric field distribution, which is regulated by using conical cathodes with different opening angles. It is shown that for cones with large angles (weakly inhomogeneous field), the runaway condition is similar to the condition for a uniform field, i.e., the field strength near the cathode must exceed a critical value, which depends on the type of gas and its density. For cones with small angles (strongly inhomogeneous field), this condition is not sufficient: an electron that runs away near the cathode can become a thermal one in a weak field at the periphery. Then for electrons to run away, it is necessary that the voltage applied to the gap exceeds a certain threshold, depending both on the properties of the gas and on the gap width.</p>

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Features of Electron Runaway in a Gas Gap with an Inhomogeneous Electric Field

  • 期刊论文

  • 发表日期：

    2025年4月1日

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  • N. M. Zubarev,
  • O. V. Zubareva,
  • M. I. Yalandin

摘要

We consider the dependence of the conditions of electron runaway in the gas gap on the degree of inhomogeneity of the electric field distribution, which is regulated by using conical cathodes with different opening angles. It is shown that for cones with large angles (weakly inhomogeneous field), the runaway condition is similar to the condition for a uniform field, i.e., the field strength near the cathode must exceed a critical value, which depends on the type of gas and its density. For cones with small angles (strongly inhomogeneous field), this condition is not sufficient: an electron that runs away near the cathode can become a thermal one in a weak field at the periphery. Then for electrons to run away, it is necessary that the voltage applied to the gap exceeds a certain threshold, depending both on the properties of the gas and on the gap width.