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首页> 外文会议>IEEE International Conference on Plasma Sciences >Enhanced efficiency of atomic oxygen generation in a single-electrode, 5NS pulsed microplasma jet
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Enhanced efficiency of atomic oxygen generation in a single-electrode, 5NS pulsed microplasma jet

机译：单电极5NS脉冲微等离子体射流中原子氧生成效率的提高

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A single-electrode, 5 millimeter long, 500 micrometer-in width, helium plasma jet was generated in ambient atmosphere when the electrode was excited with 5 ns, 8 kV pulses at 500 Hz. Optical emission spectroscopy (OES) showed that the production of excited atomic oxygen increased by a factor of 2 for the 5 ns pulsed plasma jet when compared with that for a 164 ns pulsed plasma jet operating at the same voltage, amplitude, and flow conditions. This signifies an enhanced efficiency of atomic oxygen production using the 5 ns pulsed plasma with faster rise time, as the energy per pulse was 0.12 mJ, which had only 8 % more energy per pulse than that of the longer pulsed version. Emission due to excited species including He, O, H, OH, N (C-B) and N (B-X) were observed in both of the discharges within the first 1 mm (from the tip of the electrode) of the jet. All of the emissions, except from that of N2 second positive system, decayed rapidly with the distance. Analysis of the rovibronic emission from N2 (CB) showed both the nanosecond plasma jets have a rotational temperature of 300 K and a vibrational temperature of 3000 K.
机译：当在500 Hz下用5 ns，8 kV脉冲激发电极时，在环境气氛中会生成一个5毫米长，宽500微米宽的单电极氦等离子体射流。光学发射光谱法（OES）表明，与在相同电压，振幅和流量条件下运行的164 ns脉冲等离子体射流相比，对于5 ns脉冲等离子体射流，激发原子氧的产生增加了2倍。这表示使用5 ns脉冲等离子体以更快的上升时间提高了原子氧的生产效率，因为每个脉冲的能量为0.12 mJ，每个脉冲的能量仅比较长脉冲的能量高8％。在射流的前1毫米（从电极尖端开始）内的两次放电中均观察到由于激发物质（包括He，O，H，OH，N（C-B）和N（B-X））而引起的发射。除了N2第二正系统的排放以外，所有排放都随距离而迅速衰减。对来自N2（CB）的旋转振子发射的分析表明，纳秒级等离子体射流的旋转温度均为300 K，振动温度为3000 K.

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