０．３～１．０ｃｍの正極性不平等空気ギャップでの一次コロナの統計的開始メカニズム

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タイトル別名
  • The Statistical Inception Mechanism of the First Corona in Positive Non-Uniform Air Gaps Ranging 0.3 to 1.0 cm
  • 0 3 1 0cm ノ セイキョクセイ フビョウドウ クウキ ギャップ デ ノ 1ジ コロナ ノ トウケイテキ カイシ メカニズム

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The aim of this paper is to understand the statistical inception mechanism of the first corona in positive non-uniform air gaps ranging 0.3˜1.0 cm. We calculated first how the spatial distributions of negative ion density depend on the gap length, UV irradiation and the concentration of water vapor using the steady state continuity equation for ion flow states. Next the cumulative probability of the first corona inception as a function of the statistical time lags was evaluated from the critical volume model in which initial electrons are provided by collisional detachment of negative ions. Furthermore, we also measured the cumulative probability of the corona inception under similar experimental conditions.<br>From comparison between the numerical and experimental results and their discussions, it was found that in the short range of gap length, negative ions produced near the cathode associated with positive ion bombardment play an important role in the statistical inception mechanism of the first corona. And also, much higher probability of corona inception in the case of UV irradiation was attributed to a number of negative ion produced near the cathode through the photo emission process.

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