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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Estimation of surface flashover threshold in vacuum: from multipactor to discharge plasma
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Estimation of surface flashover threshold in vacuum: from multipactor to discharge plasma

机译：真空中表面闪络阈值的估计：从多移能器放电等离子体

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摘要

We propose a novel theoretical formula to estimate the surface flashover threshold in vacuum using the intrinsic properties of dielectric material as well as dielectric-vacuum configuration. The method is based on an above-surface model called secondary electron emission avalanche (SEEA), where flashover development can be divided into multipactor discharge, out-gassing and an ionization avalanche which eventually leads to a plasma discharge. The transition from SEE-dominated regime to discharge plasma is supposed to be of significance where gas breakdown takes place within a nonuniform desorbed gas cloud in the vicinity of dielectric surface. Flashover occurs when specific space charge multiplication is achieved, yielding the critical pressure and breakdown voltage. The depiction of previous stages involves the secondary electron emission of dielectric materials, desorption and diffusion of adsorbed gas, ambient temperature, electrode structure, etc. Both particle-in-cell simulation and experiment data can corroborate the obtained theoretical results.
机译：我们提出了一种新颖的理论公式，用于使用介电材料的固有性能以及介电真空构造的固有性能来估计真空的表面闪络阈值。该方法基于称为二次电子发射雪崩（SEEA）的上表面型号，其中闪络开发可分为多移液体放电，外辐射和电离雪崩，最终导致等离子体放电。从透视的制度到放电等离子体的过渡应该具有重要性，其中气体损坏在介电表面附近的非均匀解吸气体云中进行。当实现特定空间电荷乘法时，发生闪络，产生临界压力和击穿电压。先前阶段的描绘涉及介电材料的二次电子发射，吸附气体的解吸和扩散，环境温度，电极结构等。粒子内模拟和实验数据都可以证实所获得的理论结果。

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