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arXiv 1306.4794physics.plasm-ph
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氮在氦atmospheric pressure微等离子体中的热输运

Heat transport of nitrogen in helium atmospheric pressure microplasma

Shaofeng Xu, Xiaoxia Zhong

摘要:

在空气中,通过氦气注入,在水面和金属毛细管之间产生了稳定的直流大气压正常辉光放电。多次独立重复实验表明,当气体流量从20 sccm增加到80 sccm,放电电流从11 mA减小到3 mA时,氮气的振动温度从3200 K升高到4622 K,旋转温度从1270 K降低到570 K。此外,还发现在非平衡态氦微等离子体中,氮分子的振动度比转动度优先获得能量。

英文摘要:

Stable DC atmospheric pressure normal glow discharges in ambient air were produced between the water surface and the metallic capillary coupled with influx of helium gas. Multiple independent repeated trials indicated that vibrational temperature of nitrogen rises from 3200 to 4622 K, and rotational temperature of nitrogen decreases from 1270 to 570 K as gas flux increasing from 20 to 80 sccm and discharge current decreasing from 11 to 3 mA. Furthermore, it was found that the vibrational degree of the nitrogen molecule has priority to gain energy than the rotational degree of nitrogen molecule in nonequilibrium helium microplasma.

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