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首页> 外文会议>IEEE International Conference on Plasma Science >Developing Process Of Surface Flashover Along Solid Insulating Materials Under Repetitive Nanosecond Pulses In Nitrogen
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Developing Process Of Surface Flashover Along Solid Insulating Materials Under Repetitive Nanosecond Pulses In Nitrogen

机译：氮气中反复纳秒脉冲作用下沿固体绝缘材料表面闪蒸的形成过程

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. This paper concerns the developing process of surface flashover along solid insulting material under repetitive nanosecond pulses in nitrogen. A high voltage generator is designed to provide repetitive pulses on the symmetrical finger-electrode and insulating materal (Nylon66 and PMMA) flashover configuration. The generator is capable of generating pulsees with 25 kV in amplitude 5 ns in rise time, 11 ns in pulse width and 0-10 kHz in repetitive frequency. The dynamic discharge emitted light is captured by a photomultiplier (PMT) The whole developing process of surface flashover can be divided into three stages; the withstanding stage, the enhancement stage and the stable stage. In the flashover enhancement stage, both the flashover voltage and the discharge formation time lag decrease with successive pulses. The flashover votlage approaches gradually to the DC flashover value in the stable stage. It is found that the flashover process is dependent on the pulse parameters including the amplitude and the repetitive frequency. The number of pulses the material can withstand decreases rapidly with the increase of the repetition rate. The relationship between flashover process and material surface condition is also discussed. In depth comprehension of surface flashover mechanism along solid insulating material under repetitive nanosecond pulses can be obtained through the basic developing process features. The active ions accumulation characteristic (in gas and material surface) may be the indispensable reason for the flashover developing process under repetitive nanosecond pules.
机译：。本文涉及在氮中重复的纳秒脉冲下沿固体绝缘材料的表面飞弧的发展过程。高压发生器设计用于在对称的指状电极和绝缘材料（Nylon66和PMMA）闪络配置上提供重复脉冲。该发生器能够产生幅度为25 kV的脉冲，其上升时间为5 ns，脉冲宽度为11 ns，重复频率为0-10 kHz。动态放电发出的光由光电倍增管（PMT）捕获。表面闪络的整个显影过程可分为三个阶段；第二个阶段是表面放电。承受阶段，增强阶段和稳定阶段。在闪络增强阶段，闪络电压和放电形成时间滞后都随着连续脉冲而减小。在稳定阶段，闪络电压逐渐接近直流闪络值。发现闪络过程取决于包括幅度和重复频率的脉冲参数。随着重复率的增加，材料可以承受的脉冲数迅速减少。还讨论了闪络过程与材料表面状况之间的关系。通过基本的显影工艺特征，可以得到在重复的纳秒脉冲作用下沿着固体绝缘材料的表面闪络机制的深入理解。活性离子积累特性（在气体和材料表面）可能是重复纳秒脉冲在闪蒸显影过程中必不可少的原因。

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