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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >On the current density limiting effect in SF_6-based mixtures
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On the current density limiting effect in SF_6-based mixtures

机译:基于SF_6的混合物中的电流密度限制效应

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This paper reports on the investigation of the current density limiting effect in a self-sustained volume discharge in SF_6-based mixtures due to a self-action of the discharge current on the media it passes through. The mechanism of this phenomenon in terms of electron-impact dissociation is examined. The argument is advanced that in the planar geometry the limiting effect treated may provoke triggering a spatially uniform volume discharge in the media stated even in the absence of pre-ionization. It is shown that the dissociation mathematics developed by the authors allows the quantitative estimation of the averaged expenditures of energy per formation of a dissociation fragment. Specifically, when applied to pure SF_6 this finding enables the assessment of the energy spent for F-atom formation. For the first time the influence of current pulse duration on the discharge voltage has been experimentally revealed. Both thorough qualitative and quantitative considerations including relevant numerical simulation have been performed.
机译:本文报告了对基于SF_6混合物的自持体积放电中电流密度限制作用的研究,这是由于放电电流对其所通过的介质的自作用所致。研究了这种现象在电子碰撞解离方面的机理。提出了这样的论点,即在平面几何形状中,即使没有预电离,所处理的限制效应也可能引起所述介质中空间均匀的体积放电。结果表明,作者开发的解离数学可以定量估算每次形成解离片段的平均能量消耗。具体而言,当将其应用于纯SF_6时,该发现可以评估用于F原子形成的能量。首次通过实验揭示了电流脉冲持续时间对放电电压的影响。已经进行了彻底的定性和定量考虑,包括相关的数值模拟。

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