石英管对空气中锥-板结构纳秒脉冲放电的影响

报道了石英管对大气压下空气中锥-板电极结构纳秒脉冲放电的影响实验研究.实验过程中发现将石英管纵向移动位置,放电会出现四种明显不同的形貌状态,对其机理进行了初步的探讨.利用发射光谱诊断了其转动和振动温度(分别为295和2200 K),表明该等离子体具有高度非平衡度.还进一步提出大气压下空气中产生类辉光放电的有效途径. 关键词： 纳秒脉冲放电 空气 纵向介质 非平衡等离子体

Influence of quartz tube on the nanosecond pulsed discharge in a cone-to-plane air gap

This letter reports on the experimental investigation of the influence of a quartz tube on the nanosecond pulsed discharge in a cone-to-plane air gap, with the quartz tube inserted between the electrodes in the direction parallel to the electric field. While the tube is moved along the axies of the electric field, four different phenomena appear, of which the possible mechanism is discussed. The characteristics of the discharges are diagnosed by optical methods. For five conditions, the rotational temperatures are all 295 K, and the vibration temperatures are all 2200 K, the results mentioned above demonstrate that the plasmas generated in different conditions are in a nonequilibrium state each. Furthermore, a way to produce raise to a uniform glow-like discharge mode is proposed.